{"id":250,"date":"2026-07-10T05:59:37","date_gmt":"2026-07-10T05:59:37","guid":{"rendered":"https:\/\/industrialelectricmotor.net\/?p=250"},"modified":"2026-07-10T05:59:37","modified_gmt":"2026-07-10T05:59:37","slug":"vfd-motor-for-centrifugal-pump-speed-control","status":"publish","type":"post","link":"https:\/\/industrialelectricmotor.net\/sk\/vfd-motor-for-centrifugal-pump-speed-control\/","title":{"rendered":"VFD motor pre regul\u00e1ciu ot\u00e1\u010dok odstrediv\u00e9ho \u010derpadla"},"content":{"rendered":"
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Korea Ever-Power \u00b7 S\u00e9ria YVF2 \u00b7 Sprievodca \u00fasporou energie pre \u010derpadlo s frekven\u010dn\u00fdm meni\u010dom<\/span><\/p>\n

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VFD motor pre regul\u00e1ciu ot\u00e1\u010dok odstrediv\u00e9ho \u010derpadla:
\nV\u00fdpo\u010det \u00faspory energie a sprievodca n\u00e1vratnos\u0165ou invest\u00edci\u00ed<\/span><\/h1>\n

V\u00fdmena regul\u00e1cie prietoku \u0161krtiacou klapkou za regul\u00e1ciu ot\u00e1\u010dok pomocou VFD na pohonoch odstrediv\u00fdch \u010derpadiel je jednou z najn\u00e1vratnej\u0161\u00edch invest\u00edci\u00ed do energetickej \u00fa\u010dinnosti dostupn\u00fdch v priemyseln\u00fdch a stavebn\u00fdch technik\u00e1ch. Z\u00e1kon o afinite odstrediv\u00fdch \u010derpadiel znamen\u00e1, \u017ee 20-percentn\u00e9 zn\u00ed\u017eenie ot\u00e1\u010dok u\u0161etr\u00ed takmer 49 percent v\u00fdkonu \u010derpadla \u2013 \u00faspora, ktor\u00e1 pri \u010derpadle s v\u00fdkonom 22 kW prev\u00e1dzkovanom 8 000 hod\u00edn ro\u010dne predstavuje viac ako 1 TP4T10 000 ro\u010dn\u00fdch n\u00e1kladov na elektrinu. T\u00e1to pr\u00edru\u010dka poskytuje kompletn\u00fa metodiku v\u00fdpo\u010dtu, anal\u00fdzu doby n\u00e1vratnosti a \u0161pecifik\u00e1ciu motora Korea Ever-Power YVF2 pre projekty moderniz\u00e1cie \u010derpadiel s VFD.<\/p>\n

P \u221d n\u00b3 Kubick\u00e1 \u00faspora<\/span>
\nN\u00e1vratnos\u0165 invest\u00edci\u00ed do 2 rokov<\/span>
\nIC416 Pln\u00fd kr\u00fatiaci moment pri n\u00edzkych ot\u00e1\u010dkach<\/span>
\n\u017diadny vodn\u00fd klad<\/span>
\n0,75 \u2013 200 kW<\/span><\/div>\n<\/div>\n<\/div>\n

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\n
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49%<\/div>\n
\u00daspora energie pri ot\u00e1\u010dkach \u010derpadla 80%<\/div>\n<\/div>\n
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$10,300<\/div>\n
Ro\u010dn\u00e1 \u00faspora, \u010derpadlo 22 kW pri ot\u00e1\u010dkach 80%<\/div>\n<\/div>\n
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< 1 rok<\/div>\n
Typick\u00e1 doba n\u00e1vratnosti dodato\u010dnej in\u0161tal\u00e1cie frekven\u010dn\u00e9ho meni\u010da (VFD)<\/div>\n<\/div>\n
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Nula<\/div>\n
Vodn\u00fd r\u00e1z pri zastaven\u00ed rampy VFD<\/div>\n<\/div>\n
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30+ rokov<\/div>\n
\u017divotnos\u0165 YVF2 s \u00fadr\u017ebou<\/div>\n<\/div>\n<\/div>\n

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\"Regul\u00e1cia<\/p>\n
Invertorov\u00fd motor s\u00e9rie Korea Ever-Power YVF2 pre pohony \u010derpadiel s frekven\u010dn\u00fdm meni\u010dom \u2013 n\u00faten\u00e9 d\u00fachadlo IC416 na strane bez pohonu zabezpe\u010duje pln\u00e9 chladenie pri ak\u00fdchko\u013evek ot\u00e1\u010dkach \u010derpadla, \u010d\u00edm sa zabezpe\u010d\u00ed, \u017ee motor dok\u00e1\u017ee poskytova\u0165 menovit\u00fd kr\u00fatiaci moment v celom rozsahu ot\u00e1\u010dok frekven\u010dn\u00e9ho meni\u010da od minim\u00e1lnej po maxim\u00e1lnu frekvenciu bez tepeln\u00e9ho zn\u00ed\u017eenia v\u00fdkonu.<\/div>\n<\/div>\n

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Obsah<\/div>\n
1. Afinitn\u00fd z\u00e1kon a potenci\u00e1l \u00faspory energie<\/a>
\n2. Pre\u010do \u0161tandardn\u00e9 motory zlyh\u00e1vaj\u00fa na frekven\u010dnom meni\u010di \u010derpadla<\/a>
\n3. YVF2 IC416 pri n\u00edzkej r\u00fdchlosti<\/a>
\n4. V\u00fdpo\u010det \u00faspory energie<\/a>
\n5. Doba n\u00e1vratnosti a n\u00e1vratnos\u0165 invest\u00edci\u00ed do projektu<\/a>
\n6. \u0160pecifik\u00e1cie YVF2 pre frekven\u010dn\u00fd meni\u010d \u010derpadla<\/a>
\n7. Aplik\u00e1cie frekven\u010dn\u00fdch meni\u010dov \u010derpadiel<\/a>
\n8. \u010casto kladen\u00e9 ot\u00e1zky<\/a><\/div>\n<\/div>\n

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1. Afinitn\u00fd z\u00e1kon a potenci\u00e1l \u00faspory energie<\/h2>\n

Z\u00e1kon o v\u00fdkone odstrediv\u00e9ho \u010derpadla hovor\u00ed, \u017ee v\u00fdkon na hriadeli \u010derpadla je \u00famern\u00fd tretej mocnine ot\u00e1\u010dok \u010derpadla: P\u2082 = P\u2081 \u00d7 (n\u2082\/n\u2081)\u00b3. Tento kubick\u00fd vz\u0165ah medzi ot\u00e1\u010dkami a v\u00fdkonom je z\u00e1kladom ekonomick\u00e9ho argumentu pre regul\u00e1ciu ot\u00e1\u010dok pomocou frekven\u010dn\u00e9ho meni\u010da (VFD) na pohonoch odstrediv\u00fdch \u010derpadiel. Aj mierne zn\u00ed\u017eenie ot\u00e1\u010dok vedie k ve\u013ek\u00fdm \u00faspor\u00e1m energie, preto\u017ee \u00faspora sa zn\u00e1sobuje kubicky.<\/p>\n

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Zn\u00ed\u017eenie r\u00fdchlosti<\/th>\n% plnej r\u00fdchlosti<\/th>\nV\u00fdkon ako % pri plnej r\u00fdchlosti<\/th>\n\u00daspora energie<\/th>\nZn\u00ed\u017eenie prietoku<\/th>\n<\/tr>\n<\/thead>\n
\u22125%<\/td>\n95%<\/td>\n85.7%<\/td>\n14.3%<\/td>\n5%<\/td>\n<\/tr>\n
\u221210%<\/td>\n90%<\/td>\n72.9%<\/td>\n27.1%<\/td>\n10%<\/td>\n<\/tr>\n
\u221220%<\/td>\n80%<\/td>\n51.2%<\/td>\n48,8% \u2191<\/td>\n20%<\/td>\n<\/tr>\n
\u221230%<\/td>\n70%<\/td>\n34.3%<\/td>\n65.7%<\/td>\n30%<\/td>\n<\/tr>\n
\u221240%<\/td>\n60%<\/td>\n21.6%<\/td>\n78.4%<\/td>\n40%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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Pre\u010do ovl\u00e1danie \u0161krtiacej klapky plytv\u00e1 energiou<\/div>\n

\u0160krtenie v\u00fdtla\u010dn\u00e9ho ventilu \u010derpadla za \u00fa\u010delom zn\u00ed\u017eenia prietoku \u00famerne nezni\u017euje v\u00fdkon spotrebovan\u00fd motorom. Ke\u010f je ventil \u010diasto\u010dne zatvoren\u00fd, \u010derpadlo pracuje na vy\u0161\u0161om bode svojej krivky, \u010do je menej \u00fa\u010dinn\u00e9 ako bod jeho najlep\u0161ej \u00fa\u010dinnosti. Motor na\u010falej spotreb\u00fava takmer pln\u00fd v\u00fdkon, zatia\u013e \u010do v\u00e4\u010d\u0161ina tejto energie sa plytv\u00e1 ako teplo cez obmedzenie ventilu, a nie ako u\u017eito\u010dn\u00e1 hydraulick\u00e1 pr\u00e1ca. Regul\u00e1cia ot\u00e1\u010dok pomocou frekven\u010dn\u00e9ho meni\u010da eliminuje toto plytvanie: \u010derpadlo produkuje presne po\u017eadovan\u00fd prietok pri spr\u00e1vnej v\u00fd\u0161ke a v optim\u00e1lnom bode \u00fa\u010dinnosti na krivke \u010derpadla pre dan\u00fd prev\u00e1dzkov\u00fd stav.<\/p>\n<\/div>\n<\/div>\n

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2. Pre\u010do \u0161tandardn\u00e9 motory zlyh\u00e1vaj\u00fa na pohonoch s frekven\u010dn\u00fdm meni\u010dom \u010derpadla<\/h2>\n
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Prehriatie pri zn\u00ed\u017eenej r\u00fdchlosti<\/div>\n

\u010cerpadlo vybaven\u00e9 meni\u010dom frekvencie (VFD) \u010dasto pracuje pri menovit\u00fdch ot\u00e1\u010dkach 40 a\u017e 801 TP3T po\u010das obdob\u00ed mimo \u0161pi\u010dky. Pri t\u00fdchto zn\u00ed\u017een\u00fdch ot\u00e1\u010dkach vytv\u00e1ra ventil\u00e1tor \u0161tandardn\u00e9ho motora IC411 na hriadeli iba 6 a\u017e 511 TP3T pri plnom pr\u00faden\u00ed chladiaceho vzduchu, pri\u010dom motor mus\u00ed st\u00e1le vytv\u00e1ra\u0165 dostato\u010dn\u00fd kr\u00fatiaci moment na prekonanie trenia \u010derpadla a udr\u017eanie prietoku vzduchu oproti hlave syst\u00e9mu. Zn\u00ed\u017een\u00e9 chladenie v kombin\u00e1cii s pokra\u010duj\u00facim vytv\u00e1ran\u00edm kr\u00fatiaceho momentu sp\u00f4sobuje, \u017ee teplota vinutia prekro\u010d\u00ed limit triedy F, \u010do ur\u00fdch\u013euje starnutie izol\u00e1cie a vedie k pred\u010dasn\u00e9mu zlyhaniu motora v priebehu 2 a\u017e 5 rokov pri prev\u00e1dzke, na ktor\u00fa bol syst\u00e9m \u010derpadla navrhnut\u00fd na 20 alebo viac rokov.<\/p>\n<\/div>\n

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Po\u0161kodenie izol\u00e1cie nap\u00e4\u0165ovej \u0161pi\u010dky frekven\u010dn\u00e9ho meni\u010da<\/div>\n

Modern\u00e9 meni\u010de frekvencie (VFD) zalo\u017een\u00e9 na IGBT tranzistoroch sa sp\u00ednaj\u00fa s frekvenciou 2 a\u017e 16 kHz, \u010d\u00edm generuj\u00fa nap\u00e4\u0165ov\u00e9 \u0161pi\u010dky 1 000 a\u017e 1 600 V na svork\u00e1ch motora (zosilnen\u00e9 odrazmi od d\u013a\u017eky k\u00e1bla). \u0160tandardn\u00e1 izol\u00e1cia vinutia motora triedy F je dimenzovan\u00e1 na s\u00ednusov\u00e9 priebehy nap\u00e4tia \u2013 opakovan\u00e9 vysokofrekven\u010dn\u00e9 nap\u00e4\u0165ov\u00e9 \u0161pi\u010dky sp\u00f4sobuj\u00fa \u010diasto\u010dn\u00fd v\u00fdboj v izol\u00e1cii vinutia a postupn\u00e9 preru\u0161enie izol\u00e1cie. Tento poruchov\u00fd re\u017eim \u00faplne ch\u00fdba, ke\u010f motor pracuje na s\u00ednusovom nap\u00e1jan\u00ed s pevnou frekvenciou, ale st\u00e1va sa prim\u00e1rnym mechanizmom poruchy, ke\u010f je \u0161tandardn\u00fd motor pripojen\u00fd k meni\u010du frekvencie bez primeran\u00fdch \u0161pecifik\u00e1ci\u00ed izol\u00e1cie.<\/p>\n<\/div>\n

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Po\u0161kodenie lo\u017eiskov\u00e9ho pr\u00fadu<\/div>\n

S\u00fabe\u017en\u00e9 nap\u00e4tie frekven\u010dn\u00fdch meni\u010dov (VFD) indukuje pr\u00fady na hriadeli, ktor\u00e9 sa vyb\u00edjaj\u00fa cez lo\u017eisk\u00e1 motora a sp\u00f4sobuj\u00fa EDM (elektroeroz\u00edvne obr\u00e1banie) lo\u017eiskov\u00fdch kr\u00fa\u017ekov. To sp\u00f4sobuje charakteristick\u00e9 namrznutie a ryhovanie na povrchu lo\u017eiskov\u00fdch kr\u00fa\u017ekov, zv\u00fd\u0161en\u00e9 vibr\u00e1cie a poruchu lo\u017eiska v priebehu 6 a\u017e 24 mesiacov. Motory \u010derpadiel na VFD bez ochrany proti lo\u017eiskov\u00e9mu pr\u00fadu (izolovan\u00e9 lo\u017eisko NDE alebo uzem\u0148ovac\u00ed kr\u00fa\u017eok hriade\u013ea) zlyh\u00e1vaj\u00fa v d\u00f4sledku po\u0161kodenia lo\u017eiska sk\u00f4r, ako sa porucha izol\u00e1cie stihne prejavi\u0165. Oba mechanizmy poruchy musia by\u0165 s\u00fa\u010dasne rie\u0161en\u00e9 v \u0161pecifik\u00e1cii motora YVF2 pre pohony \u010derpadiel s VFD.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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3. YVF2 IC416 Chladenie pri n\u00edzkych ot\u00e1\u010dkach \u010derpadla<\/h2>\n
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S\u00e9ria k\u00f3rejsk\u00fdch n\u00e1radia Ever-Power YVF2 vyu\u017e\u00edva n\u00faten\u00e9 chladenie IC416 \u2013 samostatn\u00fd nez\u00e1visle nap\u00e1jan\u00fd motor ventil\u00e1tora namontovan\u00fd na strane bez pohonu zabezpe\u010duje kon\u0161tantn\u00fd pr\u00fad chladiaceho vzduchu cez r\u00e1m motora bez oh\u013eadu na ot\u00e1\u010dky hlavn\u00e9ho hriade\u013ea motora. Ke\u010f meni\u010d frekvencie zn\u00ed\u017ei ot\u00e1\u010dky motora \u010derpadla na 50% (25 Hz) pre prev\u00e1dzku s n\u00edzkym za\u0165a\u017een\u00edm, ventil\u00e1tor IC416 na\u010falej poskytuje menovit\u00fd pr\u00fad chladiaceho vzduchu 100%, \u010do umo\u017e\u0148uje n\u00e1radiu YVF2 dosahova\u0165 pln\u00fd menovit\u00fd kr\u00fatiaci moment pri t\u00fdchto zn\u00ed\u017een\u00fdch ot\u00e1\u010dkach bez ak\u00e9hoko\u013evek tepeln\u00e9ho zn\u00ed\u017eenia.<\/p>\n

D\u00fachadlo IC416 je nap\u00e1jan\u00e9 z hlavn\u00e9ho trojf\u00e1zov\u00e9ho zdroja (nie z v\u00fdstupu meni\u010da frekvencie), \u010do zais\u0165uje jeho prev\u00e1dzku pri plnej menovitej r\u00fdchlosti bez oh\u013eadu na frekvenciu meni\u010da frekvencie. V\u00fdkon motora d\u00fachadla je zvy\u010dajne 1\/20 a\u017e 1\/10 menovit\u00e9ho v\u00fdkonu hlavn\u00e9ho motora \u2013 pre YVF2 s v\u00fdkonom 22 kW m\u00e1 d\u00fachadlo pribli\u017ene 0,18 a\u017e 0,37 kW \u2013 a jeho spotreba energie je zanedbate\u013en\u00e1 v porovnan\u00ed s \u00fasporou energie v\u010faka regul\u00e1cii ot\u00e1\u010dok meni\u010da frekvencie na hlavnom pohone \u010derpadla.<\/p>\n<\/div>\n

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IC416 vs IC411 pri prev\u00e1dzkov\u00fdch ot\u00e1\u010dkach \u010derpadla<\/div>\n\n\n\n\n\n\n\n\n\n
R\u00fdchlos\u0165<\/th>\nIC411 Chladenie<\/th>\nChladenie IC416<\/th>\n<\/tr>\n<\/thead>\n
50 Hz (100%)<\/td>\n100%<\/td>\n100%<\/td>\n<\/tr>\n
40 Hz (80%)<\/td>\n51%<\/td>\n100%<\/td>\n<\/tr>\n
25 Hz (50%)<\/td>\n12.5%<\/td>\n100%<\/td>\n<\/tr>\n
15 Hz (30%)<\/td>\n2.7%<\/td>\n100%<\/td>\n<\/tr>\n
0 Hz (statick\u00e9)<\/td>\n0%<\/td>\n100%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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4. V\u00fdpo\u010det \u00faspory energie \u2013 \u010derpadlo s v\u00fdkonom 22 kW<\/h2>\n
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\u010cerpadlo chladiacej vody pre procesy \u2014 dodato\u010dn\u00e1 mont\u00e1\u017e frekven\u010dn\u00e9ho meni\u010da, \u00faspora energie<\/div>\n
\n
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Syst\u00e9mov\u00e9 parametre:<\/div>\n
Menovit\u00fd v\u00fdkon motora: 22 kW
\n\u00da\u010dinnos\u0165 motora (IE3): 92,61 TP3T
\nRo\u010dn\u00fd po\u010det prev\u00e1dzkov\u00fdch hod\u00edn: 8 000 h\/rok
\nTarifa za elektrinu: $0,13 \/ kWh
\nPriemern\u00fd dopyt ako % pri plnej r\u00fdchlosti: 82%
\nOvl\u00e1danie \u0161krtiacej klapky s plnou r\u00fdchlos\u0165ou: \u00c1no<\/div>\n<\/div>\n
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V\u00fdpo\u010det:<\/div>\n
Aktu\u00e1lny vstupn\u00fd v\u00fdkon (\u0161krtiaca klapka): 22 \u00f7 0,926 = 23,76 kW
\nAktu\u00e1lna ro\u010dn\u00e1 energia: 23,76 \u00d7 8 000 = 190 080 kWh
\nAktu\u00e1lne ro\u010dn\u00e9 n\u00e1klady: 190 080 \u00d7 $0,13 = $24,710<\/strong><\/p>\n

S VFD pri priemernej r\u00fdchlosti 82%:
\nPriemern\u00fd \u00fa\u010dinn\u00edk: (0,82)\u00b3 = 55,1% menovit\u00e9ho v\u00fdkonu
\nVstupn\u00fd v\u00fdkon meni\u010da frekvencie: 23,76 \u00d7 0,551 = 13,09 kW
\nRo\u010dn\u00e1 energia: 13,09 \u00d7 8 000 = 104 720 kWh
\nRo\u010dn\u00e9 n\u00e1klady: 104 720 \u00d7 $0,13 = $13,614<\/strong><\/div>\n<\/div>\n<\/div>\n

\n
\n
$11,096<\/div>\n
Ro\u010dn\u00e1 \u00faspora energie<\/div>\n<\/div>\n
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44.9%<\/div>\n
Zn\u00ed\u017eenie energie<\/div>\n<\/div>\n
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85,360<\/div>\n
u\u0161etren\u00e9 kWh za rok<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

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5. Doba n\u00e1vratnosti a n\u00e1vratnos\u0165 invest\u00edci\u00ed do projektu<\/h2>\n
\n
\n
Typick\u00e9 n\u00e1klady na projekt moderniz\u00e1cie VFD<\/div>\n

Pre vy\u0161\u0161ie uveden\u00fd pr\u00edklad s v\u00fdkonom 22 kW pozost\u00e1va typick\u00e1 dodato\u010dn\u00e1 mont\u00e1\u017e \u010derpadla s frekven\u010dn\u00fdm meni\u010dom (VFD) z: jednotky VFD (22 kW, IP54, mont\u00e1\u017e na panel) $2 500 \u2013 4 000; invertorov\u00e9ho motora YVF2 22 kW $1 200 \u2013 1 800; pr\u00e1ce na v\u00fdmene motora a zarovnan\u00ed spojky $300 \u2013 500; elektrickej in\u0161tal\u00e1cie a uvedenia VFD do prev\u00e1dzky $800 \u2013 1 200; sn\u00edma\u010da tlaku pre PID regul\u00e1ciu (ak e\u0161te nie je nain\u0161talovan\u00fd) $200 \u2013 400. Celkov\u00e9 n\u00e1klady na projekt s\u00fa pribli\u017ene $5 000 \u2013 7 900 v z\u00e1vislosti od podmienok na mieste a existuj\u00facej infra\u0161trukt\u00fary.<\/p>\n

N\u00e1vratnos\u0165 = $6 500 (stredn\u00fd odhad) \u00f7 $11 096 \u00faspora = 0,59 roka (7 mesiacov)<\/strong><\/div>\n<\/div>\n
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\u010eal\u0161ie v\u00fdhody okrem \u00faspory energie<\/div>\n

Regul\u00e1cia ot\u00e1\u010dok pomocou frekven\u010dn\u00e9ho meni\u010da (VFD) na pohonoch odstrediv\u00fdch \u010derpadiel prin\u00e1\u0161a okrem priamej \u00faspory energie aj \u010fal\u0161ie v\u00fdhody: (1) Elimin\u00e1cia vodn\u00e9ho r\u00e1zu \u2013 VFD spoma\u013euje \u010derpadlo po riadenej rampe, a nie okam\u017eite, \u010d\u00edm zabra\u0148uje tlakov\u00e9mu n\u00e1rastu, ktor\u00fd po\u0161kodzuje ventily, k\u013aby a pr\u00edstrojov\u00e9 vybavenie. (2) Zn\u00ed\u017een\u00e9 opotrebenie \u010derpadla \u2013 prev\u00e1dzka pri zn\u00ed\u017een\u00fdch ot\u00e1\u010dkach zni\u017euje opotrebovanie obe\u017en\u00e9ho kolesa, opotrebovanie tesnen\u00ed a za\u0165a\u017eenie lo\u017e\u00edsk. (3) Pred\u013a\u017een\u00e1 \u017eivotnos\u0165 motora \u2013 zn\u00ed\u017een\u00e9 ot\u00e1\u010dky znamenaj\u00fa ni\u017e\u0161\u00ed pr\u00fad, chladnej\u0161\u00ed motor a dlh\u0161iu \u017eivotnos\u0165 vinutia a lo\u017e\u00edsk. (4) Presn\u00e1 regul\u00e1cia prietoku a tlaku \u2013 VFD dok\u00e1\u017ee modulova\u0165 ot\u00e1\u010dky \u010derpadla v reakcii na procesn\u00fd tlak alebo sign\u00e1l prietoku, \u010d\u00edm sa eliminuje potreba samostatn\u00e9ho regula\u010dn\u00e9ho ventilu na v\u00fdtla\u010dnom potrub\u00ed.<\/p>\n<\/div>\n

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\u0160k\u00e1lovanie v\u00fdpo\u010dtu<\/div>\n

\u00daspora energie sa pri rovnakom zn\u00ed\u017een\u00ed priemernej r\u00fdchlosti \u0161k\u00e1luje pribli\u017ene line\u00e1rne s v\u00fdkonom motora. \u010cerpadlo s v\u00fdkonom 37 kW pri priemernej r\u00fdchlosti 82% u\u0161etr\u00ed pribli\u017ene 18 700 T ro\u010dne; \u010derpadlo s v\u00fdkonom 75 kW u\u0161etr\u00ed 37 800 T ro\u010dne. V pr\u00edpade zariaden\u00ed s viacer\u00fdmi \u010derpadlami na ovl\u00e1danie \u0161krtiacou klapkou m\u00f4\u017ee celkov\u00e1 \u00faspora od\u00f4vodni\u0165 program moderniz\u00e1cie frekven\u010dn\u00fdch meni\u010dov v celom zariaden\u00ed s celkovou n\u00e1vratnos\u0165ou do 2 rokov, a to aj pri konzervat\u00edvne odhadovanom zn\u00ed\u017een\u00ed priemernej r\u00fdchlosti.<\/p>\n

Empirick\u00e9 pravidlo: Ro\u010dn\u00e1 \u00faspora ($) \u2248 Motor kW \u00d7 (1 \u2212 priemern\u00e1 r\u00fdchlos\u0165\u00b3) \u00d7 hodiny \u00d7 $0,13<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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6. \u0160pecifik\u00e1cie YVF2 pre odstrediv\u00e9 \u010derpadlo s frekven\u010dn\u00fdm meni\u010dom<\/h2>\n
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Rad motorov Korea Ever-Power YVF2 m\u00e1 spr\u00e1vnu \u0161pecifik\u00e1ciu motora pre v\u0161etky moderniz\u00e1cie a novostavby odstrediv\u00fdch \u010derpadiel s frekven\u010dn\u00fdm meni\u010dom (VFD). Kombinuje n\u00faten\u00e9 chladenie IC416 pre pln\u00fd kr\u00fatiaci moment pri akejko\u013evek r\u00fdchlosti, izol\u00e1ciu vinutia triedy H pre VFD pre dlhodob\u00fa odolnos\u0165 vo\u010di nap\u00e4\u0165ov\u00fdm \u0161pi\u010dk\u00e1m PWM a \u0161tandardn\u00fa ochranu vinutia termistorom PTC. YVF2 pou\u017e\u00edva rovnak\u00e9 rozmery r\u00e1mu pod\u013ea normy IEC 72-1 ako \u0161tandardn\u00fd rad Y2, \u010do umo\u017e\u0148uje nahradi\u0165 existuj\u00faci motor Y2 pri moderniz\u00e1cii \u010derpadla bez \u00fapravy z\u00e1kladovej dosky \u010derpadla, spojky alebo potrubia. Cel\u00fd rad YVF2 je k dispoz\u00edcii v... Sekcia produktov s meni\u010dov\u00fdm motorom s frekven\u010dn\u00fdm meni\u010dom<\/a>.<\/p>\n<\/div>\n

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YVF2 \u2014 \u00dadaje o pohone \u010derpadla s frekven\u010dn\u00fdm meni\u010dom<\/div>\n\n\n\n\n\n\n\n\n\n\n
Rozsah v\u00fdkonu<\/td>\n0,75 \u2013 200 kW<\/td>\n<\/tr>\n
P\u00f3ly (\u010derpadlo)<\/td>\n2P (2 900 ot.\/min.) alebo 4P (1 450 ot.\/min.)<\/td>\n<\/tr>\n
Chladenie<\/td>\nIC416 n\u00faten\u00e9 d\u00fachadlo<\/td>\n<\/tr>\n
Izol\u00e1cia<\/td>\nTrieda H, formul\u00e1cia pre pou\u017eitie s meni\u010dom frekvencie<\/td>\n<\/tr>\n
Rozsah r\u00fdchlosti<\/td>\n0\u2013120 Hz<\/td>\n<\/tr>\n
PTC termistory<\/td>\n\u0160tandardn\u00e9 3\u00d7 vo vinut\u00ed statora<\/td>\n<\/tr>\n
Ochrana<\/td>\n\u0160tandard IP54<\/td>\n<\/tr>\n
Kompatibilita r\u00e1mu<\/td>\nIEC 72-1 \u2013 rovnak\u00e9 ako s\u00e9ria Y2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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7. Aplik\u00e1cie frekven\u010dn\u00fdch meni\u010dov \u010derpadiel<\/h2>\n\n\n\n
\"Regul\u00e1cia<\/p>\n
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\u010cerpadlo studenej vody pre stavebn\u00e9 slu\u017eby<\/div>\n

Prim\u00e1rne a sekund\u00e1rne \u010derpadl\u00e1 chladiacej vody v syst\u00e9moch HVAC komer\u010dn\u00fdch budov s\u00fa aplik\u00e1ciou s najv\u00e4\u010d\u0161\u00edm vplyvom na moderniz\u00e1ciu frekven\u010dn\u00fdch meni\u010dov (VFD) kv\u00f4li ich ve\u013ekosti (7,5 a\u017e 90 kW), nepretr\u017eitej prev\u00e1dzke (8 000 hod\u00edn ro\u010dne) a vysoko variabiln\u00e9mu profilu za\u0165a\u017eenia (pln\u00e9 za\u0165a\u017eenie iba po\u010das \u0161pi\u010dkov\u00fdch letn\u00fdch dn\u00ed). Moderniz\u00e1cia frekven\u010dn\u00fdch meni\u010dov s motormi YVF2 na \u010derpadl\u00e1ch technick\u00fdch zariaden\u00ed budov pravidelne dosahuje 40 a\u017e 60 percentn\u00e9 zn\u00ed\u017eenie spotreby energie \u010derpadla s dobou n\u00e1vratnosti krat\u0161ou ako 12 mesiacov vo v\u00e4\u010d\u0161ine budov s existuj\u00facimi \u0161tart\u00e9rmi \u010derpadiel DOL alebo hviezda-trojuholn\u00edk.<\/p>\n<\/div>\n<\/td>\n

\"YVF2<\/p>\n
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Chladiaca voda pre priemyseln\u00e9 procesy<\/div>\n

\u010cerpadl\u00e1 chladiacej vody pre procesy z\u00e1sobuj\u00face v\u00fdmenn\u00edky tepla, reaktory a chladiace okruhy kompresorov v chemick\u00fdch a v\u00fdrobn\u00fdch z\u00e1vodoch pracuj\u00fa s vysoko premenliv\u00fdm prietokom, preto\u017ee za\u0165a\u017eenie procesov sa men\u00ed v z\u00e1vislosti od v\u00fdrobn\u00e9ho harmonogramu a okolitej teploty. Pohony \u010derpadiel YVF2 modulovan\u00e9 sign\u00e1lom teploty spiato\u010dky chladiacej vody alebo tlakov\u00e9ho rozdielu udr\u017eiavaj\u00fa minim\u00e1lny po\u017eadovan\u00fd chladiaci v\u00fdkon a z\u00e1rove\u0148 zni\u017euj\u00fa spotrebu energie \u010derpadla o 30 a\u017e 50% v porovnan\u00ed s prev\u00e1dzkou s pevn\u00fdmi ot\u00e1\u010dkami a riaden\u00edm obtokov\u00fdm ventilom.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Z\u00e1sobovanie vodou a zvy\u0161ovanie tlaku<\/div>\n

Posil\u0148ovacie \u010derpadl\u00e1 pre mestsk\u00e9 vodovodn\u00e9 syst\u00e9my a tlakov\u00e9 zosil\u0148ova\u010de budov s frekven\u010dn\u00fdm meni\u010dom udr\u017eiavaj\u00fa kon\u0161tantn\u00fd v\u00fdstupn\u00fd tlak v \u0161irokom rozsahu prietoku. YVF2 2-p\u00f3lov\u00fd (2 900 ot.\/min.) 3,0 a\u017e 30 kW pokr\u00fdva v\u00e4\u010d\u0161inu aplik\u00e1ci\u00ed na zvy\u0161ovanie tlaku.<\/p>\n<\/div>\n

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Zavla\u017eovacia \u010derpacia stanica<\/div>\n

Po\u013enohospod\u00e1rske zavla\u017eovacie \u010derpacie stanice s premenliv\u00fdm dopytom po zavla\u017eovan\u00ed a rast\u00facimi hlavn\u00fdmi syst\u00e9mami profituj\u00fa z regul\u00e1cie ot\u00e1\u010dok pomocou frekven\u010dn\u00e9ho meni\u010da (VFD) na udr\u017eanie kon\u0161tantn\u00e9ho v\u00fdtla\u010dn\u00e9ho tlaku pri zmene polohy po\u013en\u00fdch ventilov. YVF2 4-p\u00f3lov\u00fd 11 a\u017e 90 kW pre pohony hlavn\u00fdch zavla\u017eovac\u00edch \u010derpadiel.<\/p>\n<\/div>\n

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Pohotovostn\u00fd obsluha po\u017eiarneho \u010derpadla<\/div>\n

Dopl\u0148uj\u00face \u010derpadlo na udr\u017eiavanie tlaku v po\u017eiarnom syst\u00e9me pracuje preru\u0161ovane pri ve\u013emi n\u00edzkom prietoku, aby kompenzovalo \u00fanik zo syst\u00e9mu. Regul\u00e1cia ot\u00e1\u010dok pomocou frekven\u010dn\u00e9ho meni\u010da eliminuje cyklick\u00e9 zap\u00ednanie a vyp\u00ednanie, udr\u017eiava kon\u0161tantn\u00fd tlak s ove\u013ea men\u0161\u00edm po\u010dtom \u0161tartov a eliminuje tlakov\u00e9 prechody z opakovan\u00e9ho sp\u00fa\u0161\u0165ania DOL.<\/p>\n<\/div>\n

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\u010cerpadlo na sp\u00e4tn\u00fd odvod kondenz\u00e1tu<\/div>\n

\u010cerpadl\u00e1 na sp\u00e4tn\u00fd prietok kondenz\u00e1tu pary v priemyseln\u00fdch kotlov\u00fdch syst\u00e9moch. Objem sp\u00e4tn\u00e9ho prietoku kondenz\u00e1tu sa men\u00ed v z\u00e1vislosti od dopytu po pare. Regul\u00e1cia ot\u00e1\u010dok frekven\u010dn\u00e9ho meni\u010da na \u010derpadle kondenz\u00e1tu eliminuje prete\u010denie do odtoku a zni\u017euje opotrebovanie \u010derpadla v d\u00f4sledku \u010dast\u00e9ho zap\u00ednania a vyp\u00ednania v z\u00e1vislosti od plav\u00e1kov\u00e9ho sp\u00edna\u010da hladiny kondenz\u00e1tu.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

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\"Presn\u00e9<\/p>\n

Presn\u00e9 obr\u00e1banie<\/div>\n<\/div>\n
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\"Testovanie<\/p>\n

Test v\u00fdkonu frekven\u010dn\u00e9ho meni\u010da<\/div>\n<\/div>\n
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\"Technick\u00e1<\/p>\n

In\u017einierska podpora<\/div>\n<\/div>\n
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\"Certifik\u00e1cia<\/p>\n

Certifik\u00e1cia CE a ISO<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

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8. \u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
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Moje \u010derpadlo moment\u00e1lne be\u017e\u00ed na pln\u00e9 ot\u00e1\u010dky s \u010diasto\u010dne zatvoren\u00fdm ventilom. Ko\u013eko u\u0161etr\u00edm s frekven\u010dn\u00fdm meni\u010dom (VFD)?<\/div>\n<\/div>\n
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\u00daspora z\u00e1vis\u00ed od toho, o ko\u013eko je \u010derpadlo aktu\u00e1lne \u0161krten\u00e9. Z \u00fadajov prietokomeru a tlakomeru ur\u010dte skuto\u010dn\u00fd prev\u00e1dzkov\u00fd bod \u010derpadla (prietok a dopravn\u00fd tlak) a potom n\u00e1jdite tento bod na v\u00fdkonovej krivke \u010derpadla. V tomto bode od\u010d\u00edtajte v\u00fdkon na hriadeli \u010derpadla (alebo ho vypo\u010d\u00edtajte z \u00fa\u010dinnosti \u010derpadla v tomto bode). Teraz vypo\u010d\u00edtajte, ak\u00e1 r\u00fdchlos\u0165 by poskytla rovnak\u00fd prietok bez \u0161krtenia: nov\u00e1 r\u00fdchlos\u0165 = pln\u00e1 r\u00fdchlos\u0165 \u00d7 (skuto\u010dn\u00fd prietok \u00f7 menovit\u00fd prietok). V\u00fdkon pri novej r\u00fdchlosti je v\u00fdkon pri plnej r\u00fdchlosti \u00d7 (nov\u00e1 r\u00fdchlos\u0165 \u00f7 pln\u00e1 r\u00fdchlos\u0165)\u00b3. Rozdiel predstavuje va\u0161u \u00fasporu. Spravidla plat\u00ed: ak je va\u0161e \u010derpadlo \u0161krten\u00e9 o 15% alebo viac (ventil 70% otvoren\u00fd alebo menej) pri \u010derpadle s v\u00fdkonom nad 11 kW, ktor\u00e9 be\u017e\u00ed viac ako 4 000 hod\u00edn ro\u010dne, je dodato\u010dn\u00e1 mont\u00e1\u017e meni\u010da frekvencie (VFD) takmer ur\u010dite n\u00e1kladovo opodstatnen\u00e1 s n\u00e1vratnos\u0165ou do 2 rokov.<\/p>\n<\/div>\n<\/div>\n

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Ovplyv\u0148uje regul\u00e1cia ot\u00e1\u010dok meni\u010dom frekvencie \u017eivotnos\u0165 tesnenia \u010derpadla?<\/div>\n<\/div>\n
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Regul\u00e1cia ot\u00e1\u010dok pomocou frekven\u010dn\u00e9ho meni\u010da (VFD) vo v\u0161eobecnosti predl\u017euje \u017eivotnos\u0165 tesnenia \u010derpadla v porovnan\u00ed s prev\u00e1dzkou s pevnou r\u00fdchlos\u0165ou a \u0161krtiacou klapkou. Pri zn\u00ed\u017eenej r\u00fdchlosti je tlak na tesnen\u00ed (ktor\u00fd s\u00favis\u00ed s tlakom na v\u00fdtla\u010dnom hrdle \u010derpadla, a teda s druhou mocninou r\u00fdchlosti) ni\u017e\u0161\u00ed, \u010do zni\u017euje tendenciu k \u00faniku tesnenia a za\u0165a\u017eenie \u010delnej plochy tesnenia. Prietok preplachovania tesnenia, ak je \u010derpadlo samo preplachovan\u00e9 z v\u00fdtla\u010dn\u00e9ho hrdla, sa tie\u017e zn\u00ed\u017ei \u2013 overte si, \u010di je minim\u00e1lny odpor\u00fa\u010dan\u00fd prietok preplachovania udr\u017eiavan\u00fd pri najni\u017e\u0161ej o\u010dak\u00e1vanej prev\u00e1dzkovej r\u00fdchlosti. Ak \u010derpadlo pou\u017e\u00edva mechanick\u00e9 tesnenie s pevn\u00fdm pomocn\u00fdm preplachovan\u00edm tesnenia zo samostatn\u00e9ho zdroja, neexistuje \u017eiadne obmedzenie minim\u00e1lnej r\u00fdchlosti z h\u013eadiska preplachovania tesnenia. Pre \u010derpadl\u00e1, ktor\u00e9 \u010dasto pracuj\u00fa pri menovit\u00fdch ot\u00e1\u010dkach pod 30%, overte si u v\u00fdrobcu tesnenia, \u010di je r\u00fdchlos\u0165 preplachovania pri zn\u00ed\u017eenej r\u00fdchlosti vy\u0161\u0161ia ako minim\u00e1lna r\u00fdchlos\u0165 v\u00fdrobcu pre konkr\u00e9tny typ tesnenia.<\/p>\n<\/div>\n<\/div>\n

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M\u00f4\u017ee ten ist\u00fd meni\u010d frekvencie ovl\u00e1da\u0165 dve identick\u00e9 \u010derpadl\u00e1 v re\u017eime prev\u00e1dzky a z\u00e1lo\u017en\u00e9ho re\u017eimu?<\/div>\n<\/div>\n
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Jeden meni\u010d s frekvenciou (VFD) m\u00f4\u017ee nap\u00e1ja\u0165 dva motory YVF2 v re\u017eime prev\u00e1dzky a z\u00e1lo\u017en\u00e9ho re\u017eimu, ale k VFD je mo\u017en\u00e9 naraz pripoji\u0165 iba jeden motor prostredn\u00edctvom manu\u00e1lneho alebo automatick\u00e9ho prep\u00edna\u010da. V\u00fdstup VFD nie je mo\u017en\u00e9 pripoji\u0165 k dvom motorom s\u00fa\u010dasne, preto\u017ee kombinovan\u00fd \u0161tartovac\u00ed pr\u00fad motora by spustil nadpr\u00fadov\u00fa ochranu VFD a porucha jedn\u00e9ho motora by ovplyvnila druh\u00fd. Pri in\u0161tal\u00e1ci\u00e1ch \u010derpadiel v re\u017eime prev\u00e1dzky a z\u00e1lo\u017en\u00e9ho re\u017eimu je \u0161tandardn\u00fd pr\u00edstup: motor 1 pripojen\u00fd k VFD cez motorizovan\u00fd prep\u00edna\u010d; motor 2 pripojen\u00fd k sp\u00fa\u0161\u0165a\u010du priameho obtoku (DOL) cez ten ist\u00fd prep\u00edna\u010d. V testovacom re\u017eime z\u00e1lo\u017en\u00e9ho \u010derpadla prepnite motor 2 k VFD a motor 1 k priamemu obtoku (DOL). To poskytuje pln\u00fa schopnos\u0165 VFD na prev\u00e1dzkovom \u010derpadle a n\u00fadzov\u00fa z\u00e1lo\u017en\u00fa prev\u00e1dzku DOL na z\u00e1lo\u017enom \u010derpadle bez n\u00e1kladov na druh\u00fd VFD. Motor z\u00e1lo\u017en\u00e9ho \u010derpadla by mal by\u0165 YVF2, aj ke\u010f be\u017ene be\u017e\u00ed na z\u00e1lo\u017en\u00fa prev\u00e1dzku DOL, preto\u017ee ak VFD zlyh\u00e1 a z\u00e1lo\u017en\u00e9 \u010derpadlo mus\u00ed be\u017ea\u0165 v re\u017eime prev\u00e1dzky cez DOL bypass, aj z\u00e1lo\u017en\u00e9 \u010derpadlo bude pravdepodobne nakoniec prestavan\u00e9 na prev\u00e1dzku s VFD.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Korea Ever-Power \u00b7 S\u00e9ria YVF2 \u00b7 Pohonn\u00fd motor \u010derpadla s frekven\u010dn\u00fdm meni\u010dom<\/div>\n

Ste pripraven\u00ed vypo\u010d\u00edta\u0165 \u00fasporu energie v\u00e1\u0161ho \u010derpadla s frekven\u010dn\u00fdm meni\u010dom?<\/h2>\n

S\u00e9ria Korea Ever-Power YVF2: n\u00faten\u00e9 chladenie IC416, izol\u00e1cia VFD triedy H, termistory PTC, 0,75 \u2013 200 kW, rovnak\u00e1 kon\u0161trukcia IEC ako Y2 pre dodato\u010dn\u00fa mont\u00e1\u017e. K dispoz\u00edcii je technick\u00e1 podpora pre v\u00e1\u0161 projekt VFD \u010derpadla.<\/p>\n

Zobrazi\u0165 sortiment motorov YVF2<\/a><\/p>\n<\/div>\n<\/div>\n

Upravil Cxm<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Korea Ever-Power \u00b7 YVF2 Series \u00b7 VFD Pump Energy Saving Guide VFD Motor for Centrifugal Pump Speed Control: Energy Saving Calculation and ROI Guide Replacing throttle valve flow control with VFD speed control on centrifugal pump drives is one of the highest-return energy efficiency investments available in industrial and building services. The centrifugal pump affinity […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[28],"tags":[],"class_list":["post-250","post","type-post","status-publish","format-standard","hentry","category-industrial-electric-motor"],"_links":{"self":[{"href":"https:\/\/industrialelectricmotor.net\/sk\/wp-json\/wp\/v2\/posts\/250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/industrialelectricmotor.net\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/industrialelectricmotor.net\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/industrialelectricmotor.net\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/industrialelectricmotor.net\/sk\/wp-json\/wp\/v2\/comments?post=250"}],"version-history":[{"count":1,"href":"https:\/\/industrialelectricmotor.net\/sk\/wp-json\/wp\/v2\/posts\/250\/revisions"}],"predecessor-version":[{"id":252,"href":"https:\/\/industrialelectricmotor.net\/sk\/wp-json\/wp\/v2\/posts\/250\/revisions\/252"}],"wp:attachment":[{"href":"https:\/\/industrialelectricmotor.net\/sk\/wp-json\/wp\/v2\/media?parent=250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/industrialelectricmotor.net\/sk\/wp-json\/wp\/v2\/categories?post=250"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/industrialelectricmotor.net\/sk\/wp-json\/wp\/v2\/tags?post=250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}