EP2789090A2 - Ensemble moteur asynchrone comprenant un convertisseur de fréquence avec séparation de potentiel dans un circuit intermédiaire à tension continue - Google Patents

Ensemble moteur asynchrone comprenant un convertisseur de fréquence avec séparation de potentiel dans un circuit intermédiaire à tension continue

Info

Publication number
EP2789090A2
EP2789090A2 EP12816019.9A EP12816019A EP2789090A2 EP 2789090 A2 EP2789090 A2 EP 2789090A2 EP 12816019 A EP12816019 A EP 12816019A EP 2789090 A2 EP2789090 A2 EP 2789090A2
Authority
EP
European Patent Office
Prior art keywords
frequency converter
asynchronous motor
intermediate circuit
motor unit
bridge rectifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12816019.9A
Other languages
German (de)
English (en)
Inventor
Ralf Kleinodt
Uwe Gehlert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KD ELEKTRONIKSYSTEME GMBH
Original Assignee
KD Elektroniksysteme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KD Elektroniksysteme GmbH filed Critical KD Elektroniksysteme GmbH
Priority to EP12816019.9A priority Critical patent/EP2789090A2/fr
Publication of EP2789090A2 publication Critical patent/EP2789090A2/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/225—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode comprising two stages of AC-AC conversion, e.g. having a high frequency intermediate link
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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
    • 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

Definitions

  • the invention relates to an asynchronous motor unit with a frequency converter.
  • a frequency converter comprises an uncontrolled bridge rectifier, a DC or DC intermediate circuit and an inverter.
  • the mains voltage can be converted one or more phases into an alternating voltage with variable amplitude and / or frequency.
  • inverter topologies for reversible power flow are known. These are all types of energy converters, such as DC / DC converters, AC / DC converters and AC / AC converters.
  • Source and consumers are connected via semiconductor switches with a DC link to a memory element. There are uses certain control principles and switching frequency periods to source and load alternately to the memory element to verbin ⁇ .
  • the storage element may be an RF transformer that galvanically isolates the source and the load.
  • Frequency inverters are used, for example, in the area of air conditioning technology for controlling the air and volume flow of pumps, fans and compressors, in the lifting and conveying technology and in the field of servo drives.
  • the frequency inverters can be adjusted by parameterization to the respective motor to be controlled.
  • a speed-controllable three-phase motor is known, which is provided for operation on a suitable frequency converter.
  • the AC motor has a memory chip as "electronic type plate" on where the relevant drive Motor data is stored.
  • the drive can read the type of engine and its data during commissioning ⁇ exception automatically, so that the control parameters can be selected as appropriate.
  • Various converter topologies are . also known from wind power plants ⁇ They were for example by WANG, YANG, WU HU and in "power Electronic Technology in wind Geneeration system of variable speed - constant Frequency" (2009, 3.
  • Phase transistor with at least one of three stator windings of the three-phase asynchronous and via a respective freewheel ⁇ transistor is connected to a freewheeling collection potential.
  • the stator windings are further connected to the anode of each freewheeling diode.
  • the cathodes of the freewheeling diodes are connected to the freewheeling collection potential.
  • the phase transis ⁇ tors can be turned on and off arbitrarily, without being destroyed by an induction voltage that is above the dielectric strength of the phase transistors.
  • DD 203 442 describes a power converter system for controlling a plurality of interdependent faster electric servomotors.
  • the power converter system comprises a frequency converter with a rectifier, a DC voltage intermediate circuit, an inverter and one or more medium frequency transformers.
  • the one or more medium-frequency transformers are arranged after the inverter in the frequency converter. Depending on the output frequency (0 to Nennfre frequency of the motors), these transformers must have a considerable size, which makes them expensive and limited the use ⁇ fields. Furthermore, a foreign-guided inversion ⁇ circuit is provided between the transformer and motor.
  • Frequency converters with a built-in, all-pole sine-wave filter are known for "smooth operation" of motors. These drives provide a sinusoidal output voltage so that no motor bearing currents occur due to steep voltage ramps.
  • the frequency inverters and integrated sine-wave filters must be selected The activation of the power semiconductors is modified in a program-controlled manner in accordance with the application case.
  • These all-pole sine filters have a high circuit complexity and are not suitable for the simple connection of different motors
  • Technically known frequency converter must be specially adapted by parameterization for the particular application.This happens today mostly by a keyboard / display unit, which is located on Umrich ⁇ ter and the navigation in a menu structure.
  • Particularly complex converters allow programming in a separate programming language or by means of a corresponding graphic program on the PC. Finished data sets are then loaded into the inverter via an interface. It is also customary to store the finished parameter set on a storage medium (eg USB, chip and flash cards), which is plugged into a corresponding interface of the frequency converter and read from this.
  • a storage medium eg USB, chip and flash cards
  • the load-side converters are each a load
  • the mains and load side converters are mechanically separated from each other.
  • Task is based, an asynchronous motor unit with a
  • Windings of the motors suffer damage due to ground potential-related voltage peaks or bearing damage due to relevant leakage currents occur. The one for it
  • required frequency converter is designed to be compact and inexpensive to produce.
  • Asynchronous motor unit with the features of claim 1.
  • An asynchronous motor unit comprises an asynchronous motor and a frequency converter.
  • Frequency converter is used for controlled two-quadrant operation of the asynchronous motor, i. the operation in both directions of rotation is possible, and comprises in an initially known manner an input-side uncontrolled bridge rectifier for
  • the intermediate circuit comprises a capacitor for smoothing the DC voltage and an inductance for suppression.
  • the inverters are controlled bridges with power semiconductor switches, such as IGBT, MOSFET or
  • a known brake chopper circuit in the intermediate circuit is integ ⁇ riert.
  • a consumer of the brake-chopper circuit can also be arranged outside of the frequency converter.
  • a DC / DC controller with galvanic isolation is arranged in the DC intermediate circuit.
  • the Galva nische separation in the DC link is a ground potential-free output voltage available; As a result, in particular earth potential-related voltage spikes on the motor winding are prevented.
  • the compact low-cost frequency converter can be connected without special adaptation to all types of induction motors of the corresponding power class and yet damage to the windings and increased wear of the bearings of the engine is avoided.
  • the circuit complexity for an integrated sine filter can be significantly reduced because steep voltage edges against
  • the DC / DC controller is designed as a push-pull converter.
  • Versus- Clock converters also: push-pull converters
  • the field of switched-mode power supplies are known.
  • the DC / DC controller is a push-pull converter with a half-bridge drive and center point circuit.
  • the advantage of the Halbmaschinenansteue ⁇ tion is the fact that the transformer must be designed only for half the DC link voltage.
  • Studentstra ⁇ constraint ratio of the transformer and the duty cycle of the half bridge control are preferably to be selected such that an almost constant output voltage applied to the induction motor.
  • the control of the inverter is carried out in a known manner by appropriate pulse timing of the semiconductor switch by means of a microcontroller, so that an output voltage is provided ⁇ , which meets the requirements of the engine.
  • the grounded asynchronous motor is connected in a known manner by means of a motor-side EMC filter to the output of the frequency converter.
  • the engine-side filter may further include filter components for sine filtering and du / dt filtering. Such filters are within the skill of the art
  • du / dt filter Sizing and application known.
  • a voltage increase limitation is carried out during the switching moment. Losses, heating and leakage currents are reduced.
  • the du / dt filter becomes
  • the sine filter generates in a known manner from the
  • Fig. 1 a circuit arrangement of an inventive
  • Asynchronous motor unit with a frequency converter and with an asynchronous motor.
  • a circuit arrangement of an asynchronous motor unit according to the invention is shown with a frequency converter according to the invention.
  • the illustrated frequency converter is designed for a power range up to approx. 3kW.
  • the frequency converter comprises an input-side EMC filter 1, which is the three phases LI, L2, L3 of a three-phase
  • the rectifier 2 is an uncontrolled 6-pulse bridge rectifier, which is formed in a known manner from six network diodes Dl to D6.
  • a DC / DC controller 3 is arranged with potential separation.
  • the DC / DC controller 3 is in the illustrated embodiment as a push-pull converter with half bridge control by means of semiconductor switches Ql, Q2 (eg
  • a high-frequency transformer Tl is provided in the rectifier intermediate circuit 3, for example, a reduction ratio transla ⁇ p W: W has S 2 of 24:28:28: W s i. Since the transformers ⁇ tor is operated with high frequency, a smaller transformer can be nuclear (eg 59 ETD) was used. A primary winding of the
  • Transformer Tl is supplied with the rectified, high-frequency, switched by the semiconductor switches Ql, Q2 mains voltage.
  • a secondary winding of the transformer Tl supplies the induced voltage in the galvanically isolated circuit part.
  • a potential is formed by a central tap of the secondary winding ⁇ while the other potential is formed by the two winding ends, which are applied to the input of an inductor LI D8 via two rectifier diodes D7.
  • the inductance LI and a subsequent capacitance C4 serve to suppress interference and to smooth the voltage of the intermediate circuit 3.
  • An optional brake chopper circuit 4 is used for the reduction of energy fed into the intermediate circuit by engine braking in a known manner.
  • the brake chopper circuit 4 comprises at least one switch Q9, with which a consumer Rl can be connected to the intermediate circuit to reduce excess energy in the braking operation of the engine.
  • the consumer Rl can be arranged inside or outside the frequency converter housing.
  • a powered by the secondary winding of the transformer Tl three-phase inverter 5 is also known
  • a motor-side EMC filter 6 is connected, which is connected between the frequency converter and a three-phase asynchronous motor 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un ensemble moteur asynchrone comprenant un convertisseur de fréquence pour la régulation du moteur asynchrone (7). Le convertisseur de fréquence comprend un pont redresseur (2) non commandé côté entrée, un circuit intermédiaire à tension continue et un onduleur (5) côté sortie. Selon l'invention, le circuit intermédiaire à tension continue comprend également un régulateur CC-CC (3) avec séparation galvanique, de sorte qu'une séparation de potentiel entre le pont redresseur (2) et l'onduleur (5) est réalisée.
EP12816019.9A 2011-12-07 2012-12-07 Ensemble moteur asynchrone comprenant un convertisseur de fréquence avec séparation de potentiel dans un circuit intermédiaire à tension continue Withdrawn EP2789090A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12816019.9A EP2789090A2 (fr) 2011-12-07 2012-12-07 Ensemble moteur asynchrone comprenant un convertisseur de fréquence avec séparation de potentiel dans un circuit intermédiaire à tension continue

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11192287.8A EP2602925A1 (fr) 2011-12-07 2011-12-07 Convertisseur de fréquence doté d'une séparation de potentiel dans le circuit intermédiaire à tension continue pour le réglage d'un moteur asynchrone
EP12816019.9A EP2789090A2 (fr) 2011-12-07 2012-12-07 Ensemble moteur asynchrone comprenant un convertisseur de fréquence avec séparation de potentiel dans un circuit intermédiaire à tension continue
PCT/EP2012/074758 WO2013083761A2 (fr) 2011-12-07 2012-12-07 Ensemble moteur asynchrone comprenant un convertisseur de fréquence avec séparation de potentiel dans un circuit intermédiaire à tension continue

Publications (1)

Publication Number Publication Date
EP2789090A2 true EP2789090A2 (fr) 2014-10-15

Family

ID=47561530

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11192287.8A Withdrawn EP2602925A1 (fr) 2011-12-07 2011-12-07 Convertisseur de fréquence doté d'une séparation de potentiel dans le circuit intermédiaire à tension continue pour le réglage d'un moteur asynchrone
EP12816019.9A Withdrawn EP2789090A2 (fr) 2011-12-07 2012-12-07 Ensemble moteur asynchrone comprenant un convertisseur de fréquence avec séparation de potentiel dans un circuit intermédiaire à tension continue

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11192287.8A Withdrawn EP2602925A1 (fr) 2011-12-07 2011-12-07 Convertisseur de fréquence doté d'une séparation de potentiel dans le circuit intermédiaire à tension continue pour le réglage d'un moteur asynchrone

Country Status (3)

Country Link
US (1) US9344029B2 (fr)
EP (2) EP2602925A1 (fr)
WO (1) WO2013083761A2 (fr)

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WO2015097733A1 (fr) * 2013-12-24 2015-07-02 株式会社日立産機システム Dispositif de conversion de courant
FI20155709L (fi) * 2015-10-09 2017-04-10 Vacon Oy Rinnakkain kytkettyjen teholaitteiden ohjaus
RU2622394C1 (ru) * 2015-12-16 2017-06-15 федеральное государственное бюджетное образовательное учреждение высшего образования "Алтайский государственный технический университет им. И.И. Ползунова" (АлтГТУ) Реверсивное полупроводниковое устройство регулирования скорости трехфазного асинхронного электродвигателя
CN106556755B (zh) * 2016-10-17 2019-05-03 华讯方舟科技（湖北）有限公司 一种微波变频器输入隔离测试方法及系统
US10855214B2 (en) * 2019-04-09 2020-12-01 Hamilton Sunstrand Corporation Electrical powertrain for aircraft
KR20230021027A (ko) * 2020-06-04 2023-02-13 에테라 테크놀로지스 리미티드 개선된 갈바닉 격리를 갖는 rf 전력원
DE102022127899A1 (de) 2022-07-04 2024-01-04 Schwing Gmbh Elektrische Antriebsvorrichtung für den elektrischen Antrieb einer Autobetonpumpe, Autobetonpumpe und System zum Antrieb einer Autobetonpumpe

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Also Published As

Publication number Publication date
US9344029B2 (en) 2016-05-17
US20140346998A1 (en) 2014-11-27
EP2602925A1 (fr) 2013-06-12
WO2013083761A3 (fr) 2013-08-15
WO2013083761A2 (fr) 2013-06-13

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