SK95397A3 - Frequency converter for the operation of an asynchronous three-phase motor - Google Patents

Frequency converter for the operation of an asynchronous three-phase motor Download PDF

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Publication number
SK95397A3
SK95397A3 SK953-97A SK95397A SK95397A3 SK 95397 A3 SK95397 A3 SK 95397A3 SK 95397 A SK95397 A SK 95397A SK 95397 A3 SK95397 A3 SK 95397A3
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Slovakia
Prior art keywords
frequency converter
frequency
control
converter according
pulse width
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Application number
SK953-97A
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Slovak (sk)
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SK283106B6 (en
Inventor
Frank Willers
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Fhp Motors Gmbh
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Application filed by Fhp Motors Gmbh filed Critical Fhp Motors Gmbh
Publication of SK95397A3 publication Critical patent/SK95397A3/en
Publication of SK283106B6 publication Critical patent/SK283106B6/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • H02M7/53875—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with analogue control of three-phase output
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4902—Pulse width modulation; Pulse position modulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/08—Regulating air supply or draught by power-assisted systems
    • F23N3/082—Regulating air supply or draught by power-assisted systems using electronic means

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Control Of Ac Motors In General (AREA)
  • Inverter Devices (AREA)

Abstract

Frequency converter for supplying asynchronous three-phase AC motor e.g. in glass-blowing furnace pump and blowers The frequency converter has a control element (19) evaluating pulse width modulated (PWM) signals to provide the control pulses for individual power semiconductors within a power output stage (4). The output from an input element (9) providing required values is fed to a characteristic matching stage (13), using a stored characteristic for providing the corresponding control voltage values, fed to a pulse width modulator (15) and a clock generator (17), providing the input signals for the control element.

Description

(57) Anotácia:(57) Annotation:

Jednoduchý a lacný frekvenčný menič na prevádzku asynchrónneho trojfázového motora (3) s riadiacim členom (19) na vyhodnocovanie signálov modulovaných šírkou pulzov a na ich ďalšie vedenie k jednotlivým výkonovým polovodičovým ventilom (27) sa získa tak, že na prispôsobovací člen (13) charakteristiky je privedený signál, zodpovedajúci zadanej menovitej hodnote bez spätnej väzby, že prispôsobovací člen (13) charakteristiky má zaťažovaciu charakteristiku so zapamätanými hodnotami na zisťovanie riadiacich napätí, ktoré sú ako vstupné signály privádzané na člen (15) pulznej štrkovej modulácie a člen (17) na vytváranie taktov, a že na riadiaci člen (19) sú privádzané výstupné signály člena (15) pulznej štrkovej modulácie a člena (17) na vytváranie taktov, pomocou ktorých sú prevádzkové napätie a prevádzkové frekvencie nastaviteľné takým spôsobom, že trojfázový motor (3) pracuje s čo možno najvyšším stupňom účinnosti.A simple and inexpensive frequency converter for operating an asynchronous three-phase motor (3) with a control member (19) for evaluating pulse width modulated signals and for further routing them to individual power semiconductor valves (27) is obtained by a signal corresponding to a given nominal value without feedback is provided that the characteristic matching member (13) has a load characteristic with memorized values for detecting the control voltages that are input to the pulse pebble modulation member (15) and the member (17) and that the output signals of the pulse pebble modulation member (15) and the pulse generating member (17) are output to the control member (19) by which the operating voltage and operating frequencies are adjustable such that the three-phase motor (3) operates. with the highest possible degree m efficiency.

Frekvenčný menič na prevádzku asynchrónneho trojfázového motoraFrequency converter for operation of an asynchronous three-phase motor

LU;il.Ä5.iL...±fi.r.hn.iji.ií.LU il.Ä5.iL ... ± fi.r.hn.iji.ií.

f rekvertnáha na prsvácr kí..;f requisition of the first monkeys ..;

a s y n c h i' ó n n e h o t r o j 'f á z c v é h □ m □ t o r a..a s y n c h i n n h o t t 'z á á c c .. .. .. .. .. ..

n£ilák.ra..i.äí.......s±av.......tg.c.hD_i.ty.n £ p ± ilák.ra..i.äí ....... ....... and tg.c.hD_i.ty.

Meniče na prevádzkové napätie a prevádzkové frekvencie sú požadovaňé napríklad na prevádzku trojfázových motorov s meniteľným počtom otáčok. Konštrukcia takéhoto meniča pozostáva väčšinou z usmerňovania sieťového napätia·. medziobvodu jednosmerného napätia, ktorý napríklad pozostáva s kondenzátora n a p; o d ľ’ ž a n i. e e n e r' g i e a s t ľ i e d a č a , n a p i” í k 1 a d r i a d .i. a c e i i o z a r j. a d e n i a na vytváranie p c j žad ovan ýc h riadiacich i mp u1zov p r e trojfázové výkontové mostíky a z práve týchto'výkonových môstikov. 'Inverters for operating voltages and operating frequencies are required, for example, for the operation of variable-speed three-phase motors. The design of such a converter consists mostly of rectifying the line voltage. a DC voltage intermediate circuit, which for example consists of a capacitor n and p; o o n '. e e n e r i g i e a d i d a i, n a d i i i d d i i d. i. a c e i i o z a r j. and for creating the desired control points across three-phase power bridges and from these power bridges. '

Zo spisu DE 41 10 225 Al je známy riadiaci postup a riadiace usporiadanie pre striedač, ktorý je zo strany jednosmerného napätia spojený s indukčným strojom a ktorého spínací stav je nastaviteľný riadiacim a regulačným zariadením. Pritom sa mení zložka menovitej hodnoty, vytvárajúca krútiaci moment v závislosti na zvlnení napätia medziobvodu jednosmerného napätia. Tento stav techniky vyžaduje nákladný riadiaci postup.DE 41 10 225 A1 discloses a control process and control arrangement for an inverter which is connected to an induction machine on the DC voltage side and whose switching state is adjustable by the control and regulating device. In this case, the nominal component generating the torque is varied depending on the voltage ripple of the DC link. This prior art requires an expensive management procedure.

Ďalej spis DE 41 01 341 Al zverejňuje frekvenčný menič pre asynchrónny trojfázový motor, v ktorom riadiaca elektronika, iFurthermore, DE 41 01 341 A1 discloses a frequency converter for an asynchronous three-phase motor in which the control electronics i

hlavne mikropočítač, nastavujú prevádzkovú frekvenciu a prevádzkové napätie motora podľa menovitých otáčok. Ak sa odchýlia pritom skutočné otáčky od menovitých otáčok, mikropočítač potom pomocou riadenia šírkou impulzov, budičov a výkonových tranzistorov doregulováva prevádzkové napätie tak, aby' sa skutočné otáčky rovnali otáčkam menovitým. Pre túto reguláciu otáčok je dodatočne vyžadovaný t a c ho generátor ·, čím sa frekvenčný menič p red raží.especially the microcomputer, they set the operating frequency and the operating voltage of the motor according to the rated speed. If the actual speed deviates from the nominal speed, the microcomputer then adjusts the operating voltage by means of pulse width control, drivers and power transistors so that the actual speed is equal to the rated speed. An additional t and c generator is additionally required for this speed control, thereby reducing the frequency converter p.

Esd:šií.±.s.±fä.......ν:ν.πΑ1.ίϊϊ..ώ.ι„ι úlisnou vynálsľ;.: Je vytvoriť frekvenčný menič na prevádzku asychrónneho trojfázového no tern, ktorý sa vy znadu je jednoduchou a lacnou konštrukciou a je vhodný na lacnú hromadnú výrobu,. Táto úloha je riešená znakmi, vyznačenými v patentovom nároku 1.Esd: more. ± .s. ± fä ....... ν: ν.πΑ1.ίϊϊ..ώ.ι "ú vy lis lis ú::: ú Je Je Je Je Je Je Je The bait is a simple and inexpensive design and is suitable for cheap mass production. This object is achieved by the features set forth in claim 1.

F'rekvenčný menič p r e asychrónny trojfázový motor sa vyznačuje jedenoduchými a lacnými jednotlivými dielmi, pričom je upustené oč použitia drahého mikroprocesora. Preto nachádza tento menič na prevádzku asychrónnych trojfázových motorov použite v čerpadlách, dúchadlách, hlavne v plynových dúcnadlových horákos h..The frequency converter over an asynchronous three-phase motor is characterized by simple and inexpensive single parts, while the use of an expensive microprocessor is dispensed with. Therefore, this inverter is used to operate asychronous three-phase motors in pumps, blowers, especially gas-fired burner burners.

Daléie výhodné uskutočnenia predmetu vynálezu sú zrejmé z ďalšie h patentových nárokov,.Further advantageous embodiments of the invention are evident from the further claims.

Vynález je ďalej bližšie ' .opísaný na , základe, príkladu uskutočnenia podľa pripojených výkresov, ktoré znázorňujú na obr.. 1 blokovú schému asychrónneho trojfázového motora s frekvenčným meničom a na obr.2 detaily frekvenčného meniča.BRIEF DESCRIPTION OF THE DRAWINGS The invention is described in more detail below with reference to the accompanying drawings, in which: FIG. 1 shows a block diagram of an asynchronous three-phase motor with a frequency converter and FIG. 2 shows details of a frequency converter.

ErlklAdx-iu^J^^ErlklAdx-iu ^ J ^^

Obr. 1 znázorňuje blokovú schému -frekvenčného meniča .1. s riadiacou časťou 2 a výkonovou časťou £ ha prevádzku ) asychrónneho trojfázového motora 3» ktorého otočný hriadeľ 5 je spojený s kolom Z vetráka napríklad na použitie v plynovom clúchadlovom horáku. Frekvenčný menič Z získava vstupné signály zo v s t u pn é h o pr i s p ôso bovaci e ho člena 2., k to rý m sú d o predu d an é menovité hodnoty bez spätnej väzby. Tento vstupný prispôsobovací člen 2 získava menovité hodnoty napríklad z riadiaceho člena U., bližšie neznázorneného riadenia kotla. Menovité hodnoty môžu pritom predstavovať hodnoty pre napätie medzi 0 V až 10 V alebo pre prúd medzi 4 až 20 m A·, pričom otáčky n napríklad hodnote napätia 0 V alebo hodnote prúdu 4 mA a. otáčky n n ma x hodnote napätia 10 '-J, poprípade 20 m A. Tieto menovité hodnoty sú d o pre d lá dané napríklad riadením kotla, a sú :r v s t u p r i ý p i·- i s p? ô s o b o v a c í č 1 e n 2. p ľ i v á d s a. n é n a p r i. s:; p ď s í: j b o v a c:: í č 1 e n .1.3 't::: in a ľ a k t. e r i s t i k y „ T e n t o p r i s p ô s; a b c; v a c í č 1 e n .1.3 í:: in a r a k t a ľ i s t i k y obsahuje zapamätanú c ha rak teris t i k lá na zisťovanie riadiacich napätí, ktoré sú potom ako vstupné signály privádzané na člen .1.3Fig. 1 shows a block diagram of a frequency converter. with a control part 2 and a power part 5 (h and operation) of an asynchronous three-phase motor 3, whose rotary shaft 5 is connected to a fan wheel Z, for example for use in a gas-fired burner. The frequency inverter Z receives the input signals from the actuating member 2, since the predetermined nominal values are without feedback. This input adaptation member 2 obtains nominal values, for example, from a control member U, not shown in detail of the boiler control. The nominal values can be values for voltages between 0 V to 10 V or for currents between 4 and 20 m A ·, the speed n being, for example, a voltage of 0 V or a current of 4 mA a. speed n n and x a voltage value of 10'-J or 20 m A. These nominal values are determined by the boiler control, for example, and are: ô s o c tio n 1 e n 2. n é n a p r i. with:; s: j b o v c c i n e1.3 't ::: in a ľ k t. e r i s t i s' T e n t o p s s; a b c; .1.3....... in., contains a memorized value for detecting control voltages, which are then applied to the .1.3 input signals as input signals.

O odpavedaj úO odpavedaj ú

P lá 1 z n e j ä í r k o vej m o d u 1 á í::: i e a čie n 1.Z na vytváranie taktov,,P a 1 n o r i n o o o o o o o o :: :: i o ch i n 1.Z to create tactics ,,

C h a r' akte r i s t i k a v p r i s p ô s o b o v a c o m č 1 e n e f r e k v e n č n o u n a p ä ť u v c> u c h a r akte r i s t i k o lá a m á na p r í k 1 a d t v a rC h a r t a r i s t o r o s t o n o n o n e n e n e n e n e n e n e n e n e n e r a t r a n t r e n t a r a r t

P a r a t? o 1 y , p r i č o m f r e k v e n c i a f je ú in e r n á napätiu U na kvadrát.P and r and t? o 1 y, where the f and e is effective for the voltage U per square.

vytváranie taktov vytvára ľ i a d i a í::: e h c:? n apatia taktovacie signály napríkladCreating Strokes Creates ::: e h c :? n apatia clock signals for example

H z , ktoré s čí ďa lejH z, with whom

Riadiaci člen ,1.2 získava tiež výstupné signály z č 1 e r i a .1,5 P lá 1 z n e j s í r k o vej m o d u 1 á c: i e, p r i č c m s í rk a pu1 z c 3 v leží pod ľ a z i s ten é ho riadiaceho napätia medzi 10 X až 100 í.The control member 1.2 also receives the output signals from the No. 1 .1.5 P a l 1 of the lower modulation mode, where the cms rk and the pulse 3 are located under the control voltage between 10 X to 100 µ.

V rámci vynálezu 'môže frekvenčná prebiehať tiež lineárne, to znamená napäťová charrakteŕistikaWithin the scope of the invention, the frequency can also be linear, i.e. voltage characteristic

F UF o d s t a t n é je, že frekvenčná napäťová charakteristika je prispôsobená na použitie v lá s p o i' i a d a n í p o h c n o v«F UF is that the frequency voltage characteristic is adapted for use in a wide range of applications.

R i. a d i a c i č 1 e n 19 v y h o d n o c lá je š í r k o u p lá 1 z o v m o d lá i o va n é výstupné signály a zapojuje jednotlivé výkonové polovodičové ventily vo výkonovej časti Výkonová časť 4. môže napríklad pozostávať z troch polovodičových mostíkov. Frekvenčný menič riadi napätie 'motora podľa požadovaných otáčok trojfázového motora Z, pričom obdĺžnikové točivé pole je vytvárané tromi o 120R i. The output section 4, for example, may consist of three semiconductor bridges. The output section 4 may consist of three semiconductor bridges. The frequency converter controls the motor voltage according to the desired speed of the three-phase motor Z, the rectangular rotating field being generated by three 120

I stupňov fázovo posunutými fázami a trojfázový motor 3. pracuje s čo možno najvyšším stupňom účinnosti.The phase-shifted phases and the three-phase motor 3 operate with the highest degree of efficiency.

R i a d i a c: i č 1 e n 19 p o z o s t á v a z p r o g r a m o v a t e ľ n é h o m o d u 1 u ·, hlavne z modulu GAL.C o n i c c i i n n e n e n 19 p o s t o r t o r t o r t o n t o t e n t o n u u, mainly from the GAL module.

Nai riadiaci člen 19 je pripojený výstupný signál n ad prúdového kom par á to ra 21, ktorý je zo strany výstupu, spojený s kondenzátorom 23. a meriacim odporom 25.Our control member 19 is connected to the output signal n of the current comparator 21, which is connected on the output side to the capacitor 23 and the measuring resistor 25.

Frekvenčný menič 1 podľa vynálezu na prevádzku asychrónneho ŕ Ώ Q t O ľ a ίϊί áFrequency converter 1 according to the invention for the operation of an asynchronous Ώ Ώ t a ϊ ϊ á

Lipu, s ten é OuLip, with that Ou

Jednoduchú a la í::: n ú kcnútrukciL, pretože ípôSo byť použitia o i k n o □ r ď e o v a c a p ara c, e t r ο v..Simple and easy to use, because it can be used in a c a p ara c, e t r ο v ..

F' A T ENTO V ÉF 'A T ENTO V É

Claims (6)

NÁROKY i- ľ e k ve n í: n ý í ti s n .1. č n a p r e v á d z k i..i a s y ri c: h r ó n n s h o t ľ o J f á z c v é h o motora, pričom riadiaci čie? n vy had nocuj e Šírkou pulzov modulované signály a privádza i c n k J ednotl ivým výkonovým polovodičovým' von t i Iíjíji ma n iča, v y z n a č u j ú c i s a tým, ž z: na prispôsobovac :í. člen (13) charakteristiky Je pripojený signál, odpovedájúr i zadanej menovitej hodnote bez spätnej väzby, že P ľ i s p ô s o b o v a ¢::: í čie n ( 1 3) c. h a r a k t s r i s tiky n 1 á zaťaž o v a c:: i u charakteristiku so zapamätávanými hodnotami na zisťovania riadiacich napätí, ktoré sú ako vstupné signály pripojené na člen (15) pulznej ä í rkoveJ modulácie a na člen (17) na vytváranie taktov a že na riadiaci člen (19) sú pripojené výstupné signály č 1 e n a ( 17 ) na v y t v á ľ a n .1 e taktov, p o m o c: o u k t o ľ ý c 1 ί s ú p ľ e v á d z k o v é napätie a prevádzková frekvencia nastaviteľné takým spôsobom, že motor (3) pracuje s čo možno najvyšším stupňom účinnosti.CLAIMS WHAT: OTHERS WITH N .1. S o r i s i i s s y r i c: h r n n s h o t J f a c c o h o engine, whereby the control? The pulse width modulated signals provide input to the single power semiconductor out of the inverter and to the adapters. characteristic element (13) A signal, a response, and a set nominal value without feedback are connected, that P i s p ¢:::::: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 The load characteristics are memorized values for detecting control voltages, which are connected as input signals to the pulse width modulation member (15) and to the pulse generating member (17), and to the control member (15). 19) are connected the output signals of 1 female (17) to the .1 cycle creation, the help of: 1 volt with the operating voltage and operating frequency adjustable in such a way that the motor (3 ) works with the highest degree of efficiency. .21 Frekvenčný menič .potí ľ ä nároku 1, v y '.z n a č u J ú. c i sa t ý m, že frekvenčná napäťová charakteristika Je prispôsobená na P o užitie v usporiadan í p o ho n o v„.21 A frequency converter according to claim 1. characterized in that the frequency voltage characteristic is adapted for use in an arrangement of the 3» Frekvenčný menič podľa nároku 2, vy z. n a č u J ú c: i t ý m, že frekvenčná napäťová c barakteristika má tvar paraboly, napríklad Fý^LP ..3. A frequency converter according to claim 2, wherein the frequency converter is used. characterized in that the frequency voltage characteristic is in the form of a parabola, for example Fy ^ LP. 4.. Frekvenčný menič podľa nároku 2, vyznač u j ú c i s; a t ý m, že frekvenčná to z n amen á FAXJ,.A frequency converter according to claim 2, characterized in that; and in which the frequency is not FAXJ. napäťová charakteristika prebieha lineárne,voltage characteristic is linear, 5F ľ e k. v e n č n ý menič podľa nároku , v y z n a č u J ú. c i. s a t ý m ý že riadiaci člen módu 1 om.5F e e. An inverter according to claim 1. c i. characterized in that the Mode 1 controller is omitted. (19) je programovateľným logickým(19) is a programmable logic 6. Frekvenčný menič podľa nároku n a č u j ú c i s a t ý m, že logický modul je modulom GAL..6. A frequency converter according to claim 1, wherein the logic module is a GAL module. 7., Frekvenčný menič podľa niektorého z predchádzajúcich nárokov·, v y z n a r u j ú c i s a t ý m, ž s na riadiaci či en ( 1f?) jeA frequency converter according to any one of the preceding claims, characterized in that the control unit (1 f ?) Is P r i i-> o J s n ý v ý s t u p n ý s i g n á 1 n a d p r ú d o v é h o k o m p a r á t o r a (21), k t o i- ý je zo strany vstupe spojený s kondenzáte rum '(23) a s moriac im c cíp o r o m (25).In the case of the output signal 1 of the overhead heater (21), which is connected to the rum condensate (23) and the pickling point ( 25). S. Frekvenčný menič podľa niektorého z prúde: hudca j ú c ich nárokov, vyznač u j ú c i sa tým, “e usporiadanie na 'prevádzku a s y n c: In r ó n n y u h t r o j t á z o v ý c h m o t o r o v s a p c:> u živa v č e r p a d 1 á ::: h, dúchadlách, hlavne v olejových ä plynových d ú c had 1ových horákoch.S. A frequency inverter according to any of the following: claim 1, characterized in that the arrangement for the operation of the async is: h, blowers, especially in oil and gas burners. ?\) W-OľV?) W-OľV F! G. 2F! G. 2
SK953-97A 1996-07-12 1997-07-11 Frequency converter for operating an asynchronous three-phase motor SK283106B6 (en)

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DE19628148A DE19628148A1 (en) 1996-07-12 1996-07-12 Frequency converter for operating an asynchronous three-phase motor

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DE19921045B4 (en) * 1998-07-16 2008-02-14 Dreizler, Ulrich, Dipl.-Ing. Burner for combustion of liquid and / or gaseous fuels in combustion plants
DE19903779A1 (en) * 1999-02-01 2000-08-03 Wilo Gmbh Communication between pump and boiler
AT412902B (en) * 2003-09-23 2005-08-25 Vaillant Gmbh METHOD FOR ADJUSTING THE HEATING PERFORMANCE OF A FAN SUPPORTED HEATER
EP1701096A1 (en) * 2005-03-10 2006-09-13 Vaillant GmbH Method for adapting the heater power of a blower-supported heater to the individual pressure losses of a fresh air/exhaust gas pipe
DE102009006803A1 (en) * 2009-01-30 2010-08-05 Amazonen-Werke H. Dreyer Gmbh & Co. Kg Agricultural field sprayer
DE102022203427A1 (en) * 2022-04-06 2023-10-12 BSH Hausgeräte GmbH Method for operating an inverter, inverter and household appliance

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DE4101341A1 (en) * 1991-01-18 1992-07-23 Ako Werke Gmbh & Co Frequency transverter for operating polyphase induction motor - with control electronics to set operating frequency and voltage according to ideal motor speed
DE4102893A1 (en) * 1991-01-31 1992-08-06 Siemens Ag Pulse width modulated three=phase current converter for washing machine motor - has transistors clocked by fundamental frequency of output voltage in half bridges with diodes in one half
DE4110225C2 (en) * 1991-03-28 1994-07-21 Abb Patent Gmbh Control method and control arrangement for an inverter
IT1266377B1 (en) * 1993-05-31 1996-12-27 Merloni Antonio Spa POWER SUPPLY OF INDUCTION ELECTRIC MOTORS BY MEANS OF ELECTRONIC INVERTERS

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ATE207671T1 (en) 2001-11-15
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DE59705048D1 (en) 2001-11-29
EP0823774A1 (en) 1998-02-11

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