WO2015113304A1 - Circuit d'entraînement de moteur et son dispositif - Google Patents

Circuit d'entraînement de moteur et son dispositif Download PDF

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Publication number
WO2015113304A1
WO2015113304A1 PCT/CN2014/071843 CN2014071843W WO2015113304A1 WO 2015113304 A1 WO2015113304 A1 WO 2015113304A1 CN 2014071843 W CN2014071843 W CN 2014071843W WO 2015113304 A1 WO2015113304 A1 WO 2015113304A1
Authority
WO
WIPO (PCT)
Prior art keywords
capacitor
motor drive
drive circuit
electrically connected
rail
Prior art date
Application number
PCT/CN2014/071843
Other languages
English (en)
Inventor
Peter Lonsdale
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to PCT/CN2014/071843 priority Critical patent/WO2015113304A1/fr
Publication of WO2015113304A1 publication Critical patent/WO2015113304A1/fr

Links

Classifications

    • 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

Definitions

  • the present invention relates to a drive circuit, and in particular, to a motor drive circuit and the device thereof.
  • a motor drive circuit can supply electrical power for a motor.
  • a motor drive circuit in the prior art is shown in Fig. 1.
  • the motor drive circuit includes a rectifier module 40, a DC bus module 42, and an inverter module 44.
  • the rectifier module 40 can rectify a 3 phase AC electrical power to a DC electrical power, and apply the DC electrical power to the DC bus module 42.
  • the DC bus module 42 smoothes the DC voltage and then transports it to the inverter module 44. Switch devices in the inverter module 44 inverts the smoothed DC voltage to a 3 -phase AC power supply suitable for the motor to use.
  • a smoothing capacitor C is disposed in the DC bus module 42, which is connected in parallel between a positive rail and a negative rail of the DC bus module.
  • the main functions of the smoothing capacitor C are: providing the charging current for the parasitic capacitance of each switch device in the inverter module 44; smoothing the rectified voltage from the rectifier module 40, to supply a stable current for the inverter module; and storing some electrical energy, so that the motor can respond quickly.
  • the capacitance of the capacitor is higher while the current capacity is lower, and the current capacity is higher while the capacitance is lower.
  • the capacitor with a high capacitance and a high current capacity is expensive and bulky.
  • An object of the present invention is to provide a motor drive circuit which can realize the above functions with smaller size and/or lower cost, or the improved functionality with similar size and/or similar cost.
  • the first aspect of the present invention provides a motor drive circuit, including a rectifier module, a DC bus module, and an inverter module.
  • the rectifier module can rectify AC electrical power and output a DC voltage.
  • the DC bus module can smooth the DC voltage and then output a smoothed DC voltage, and the DC bus module includes a positive rail, a negative rail, a first capacitor unit, and a second capacitor unit.
  • the first capacitor unit includes a first capacitor for charging the parasitic capacitor of each switch devices in the inverter module.
  • the first capacitor is electrically connected between the positive rail and the negative rail.
  • the first capacitor, the positive rail, the inverter module, and the negative rail can be electrically connected as a first current loop.
  • the second capacitor unit includes a second capacitor for smoothing the DC voltage and supplying electrical power to the motor, which is electrically connected between the positive rail and the negative rail.
  • the second capacitor unit, the positive rail, the inverter module, and the negative rail can be electrically connected as a second current loop.
  • the second capacitor unit can ensure that the charging current for charging the parasitic capacitance of the switch devices existed in the second current loop within the current rating of the second capacitor.
  • the second capacitor unit includes a filter inductor and a damping resistor.
  • the second capacitor, the damping resistor, and the filter inductor are connected in series, and then connected between the positive rail and the negative rail.
  • the second capacitor unit includes a filter inductor and a damping resistor.
  • the filter inductor and the damping resistor are connected in series, and then connected in series in the positive rail.
  • One terminal of the second capacitor is electrically connected to one terminal of the damping resistor, and the other terminal of the second capacitor is electrically connected to the negative rail.
  • the second capacitor unit includes a filter inductor and a damping resistor.
  • the filter inductor is connected in series in the positive rail.
  • One terminal of the second capacitor is electrically connected to one terminal of the filter inductor, and the other terminal of the second capacitor is electrically connected to the damping resistor.
  • the other terminal of the damping resistor is electrically connected to the negative rail.
  • the first capacitor can be a film capacitor
  • the second capacitor can be an electrolytic capacitor
  • the first capacitor and the second capacitor can be electrolytic capacitors.
  • the motor drive circuit comprises a pre-charging unit.
  • the pre-charging unit comprises a resistor which is connected in series with the first capacitor unit and the second capacitor unit, and a switch which is connected in parallel with the resistor.
  • the second aspect of the present invention provides a motor drive device, which includes one of the above-mentioned motor drive circuits.
  • Fig. 1 shows a motor drive circuit in the prior art.
  • Fig. 2 is a schematic structural diagram for illustrating an exemplary embodiment of a motor drive circuit.
  • Fig. 3 is a schematic structural diagram for illustrating another exemplary embodiment of the motor drive circuit.
  • Fig. 4 is a schematic structural diagram for illustrating still another exemplary embodiment of the motor drive circuit.
  • Fig. 5 is a schematic structural diagram for illustrating still another exemplary embodiment of the motor drive circuit.
  • Vo 1 , Vo2, Vo3 a 3-phase output DETAILED DESCRIPTION
  • exemplary means “serving as an example, instance, or illustration”, and any drawing or embodiment described as “exemplary” herein should not be explained as a more preferred or advantageous technical solution.
  • Fig. 2 is a schematic structural diagram for illustrating an exemplary embodiment of a motor drive circuit. As shown, the motor drive circuit includes a rectifier module 10, a DC bus module 20, and an inverter module 30.
  • the rectifier module 10 can rectify a 3-phase AC electrical power (Vil, Vi2, Vi3), and output a DC voltage.
  • the rectifier module 10 can use any known 3-phase rectify circuit, which will not be described herein.
  • the rectifier module can rectify a 2-phase AC electrical power, and output a DC voltage.
  • the DC bus module 20 can be input with the DC voltage which is output by the rectifier module 10. Then the DC bus module 20 smoothes the DC voltage and output a smoothed DC voltage, so that the fluctuation of the DC voltage can be reduced.
  • the DC bus module 20 includes a positive rail 22, a negative rail 24, a first capacitor unit 26, and a second capacitor unit 28.
  • the first capacitor unit 26 includes a first capacitor CI .
  • the first capacitor CI is electrically connected to the positive rail 22, and its other terminal is electrically connected to the negative rail 24.
  • the first capacitor CI is of bigger current capacity and smaller capacitance than the second capacitor C2.
  • the first capacitor CI can charge the parasitic capacitor of each switch devices in the inverter module 30, e.g., the first capacitor Clean be a film capacitor or electrolytic capacitor.
  • the first capacitor unit 26, the positive rail 22, the inverter module 30, and the negative rail 24 are electrically connected as a first current loop.
  • the second capacitor unit 28 includes a second capacitor C2.
  • One terminal of the second capacitor C2 is electrically connected to the positive rail 22, and the other terminal of the second capacitor C2 is electrically connected to the negative rail 24.
  • the second capacitor C2 can smooth the DC voltage and supply electrical power to the motor.
  • the second capacitor C2 is of bigger capacitance and smaller current capacity than the first capacitor CI, e.g., the second capacitor C2 can be an electrolytic capacitor.
  • the second capacitor unit 28, the positive rail 22, the inverter module 30, and the negative rail 24 are electrically connected as a second current loop.
  • the second capacitor unit 28 also includes a filter inductor LI and a damping resistor Rl .
  • One terminal of the second capacitor C2 is electrically connected to the positive rail 22, and the other terminal of C2 is electrically connected to one terminal of the damping resistor Rl .
  • the other terminal of the damping resistor Rl which is not electrically connected to the second capacitor C2, is electrically connected to one terminal of the filter inductor LI ; and the other terminal of the filter inductor LI , which is not electrically connected to the damping resistor Rl, is electrically connected to the negative rail 24.
  • the second capacitor C2, the damping resistor Rl and the filter inductor LI are electrically connected in series.
  • the inverter module 30 can be input with the output of the DC bus module 20, the smoothed DC voltage.
  • six switch devices are disposed in the inverter module 30, and through periodically turning on and off these switch devices, the smoothed DC voltage can be chopped, so that the inverter module 30 can output a 3-phase voltage (Vol, Vo2, Vo3) with an adjustable frequency. This 3-phase voltage is applied to a coil of the motor, so that the motor can operate.
  • the switch devices used in the inverter module 30 can be known power electronic switches, such as IGBT and MOSFET. Further, the inverter module 30 can adopt any known circuit topology to chop the smoothed DC voltage and output the 3-phase voltage, which will not be described herein.
  • the first capacitor CI with a high current capacity can charge the parasitic capacitance of the switch devices in the inverter module 30.
  • the charging current of the first capacitor CI which charges the parasitic capacitance, is a high frequency current, and can flow in the first current loop.
  • the second capacitor C2 with a high capacitance can well smooth the DC voltage input to the DC bus module 20, to obtain a smoothed DC voltage with a tiny fluctuation. Also, the second capacitor C2 can have enough storage capacity to instantaneously power the motor, so that the motor has a good transient response. Also, the filter inductor LI and the damping resistor Rl disposed in the second capacitor unit 28 are connected with the second capacitor C2 as a LCR filter circuit. For the charging current for charging the parasitic capacitance, the impedance of the LCR filter circuit is very large, so that the charging current existed in the second current loop is within the current rating of the second capacitor C2, protecting the second capacitor C2 from being damaged.
  • the selection of the filter inductor LI can be done by computing according to the frequency range of the charging current, which will not be described herein.
  • the damping resistor Rl is used to avoid resonance occurring in the second current loop.
  • the resistor value also needs computing according to the charging current, which will not be described herein.
  • Fig. 3 is a schematic structural diagram for illustrating an exemplary embodiment of the motor drive circuit, and the structure thereof same with Fig. 2 will not be described herein.
  • a second capacitor unit 28 includes a second capacitor C2, a filter inductor LI, and a damping resistor Rl .
  • the filter inductor LI and the damping resistor Rl are connected in series, and then connected in series in a positive rail 22.
  • One terminal of the second capacitor C2 is electrically connected to one terminal of the damping resistor Rl, which is not connected to the filter inductor LI, and the other terminal of the second capacitor C2 is electrically connected to a negative rail 24.
  • a second capacitor unit 28 includes a second capacitor C2, a filter inductor LI, and a damping resistor Rl .
  • the filter inductor LI is connected in series in a positive rail 22.
  • One terminal of the second capacitor C2 is electrically connected to one terminal of the filter inductor LI, and the other terminal of the second capacitor C2 is electrically connected to one terminal of the damping resistor Rl .
  • the other terminal of the damping resistor Rl is electrically connected to a negative rail 24.
  • the motor drive circuit comprises a pre-charging unit 21.
  • the pre-charging unit comprises a resistor R2 and a switch S 1.
  • the resistor R2 is connected in series with the first capacitor unit 26 and the second capacitor unit 28, and the switch SI is connected in parallel with the resistor R2.
  • the switch SI of the DC bus module 20 is opened before the power is connected to the motor drive circuit.
  • the resistor R2 of the DC bus module 20 can limit a current flowing across the first capacitor CI and the second capacitor C2.
  • the switch S 1 is closed to bypass the resistor R2 to give a low impedance connection from the rectifier module 10 and the DC bus module 20.
  • the parasitic capacitance of the switch devices in the inverter module can be charged by the first capacitor in the first current loop, the stabilization of the DC voltage and the fast response of the motor can be realized by the second capacitor in the second current loop, and the charging current of the parasitic capacitance existed in the second current loop can be within the current rating of the second capacitance, ensuring that the second capacitor can be used safely.
  • the cost of manufacturing the whole motor drive circuit can be reduced effectively, meanwhile the volume of the capacitor device is reduced effectively, and therefore the size of the whole motor drive circuit can be reduced effectively.
  • the second aspect the present invention provides a motor drive device for driving motors, which includes one of the above-mentioned motor drive circuits. Similarly, such motor drive device can be smaller size and/or lower cost.

Landscapes

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

Abstract

Dans un circuit d'entraînement de moteur, un module de bus continu (20) possède un rail positif (22), un rail négatif (24), une première unité de condensateur (26), et une seconde unité de condensateur (28). La première unité de condensateur (26) comprend un premier condensateur (CI) pour charger les condensateurs parasites de chaque dispositif de commutation dans le module d'onduleur (30), qui est électriquement connecté entre le rail positif (22) et le rail négatif (24). Le premier condensateur (CI), le rail positif (22), le module d'onduleur (30), et le rail négatif (24) peuvent être électriquement connectés sous la forme d'une première boucle de courant. La seconde unité de condensateur (28) comprend un second condensateur (C2) pour lisser la tension continue et fournir de l'énergie électrique au moteur, qui est électriquement connecté entre le rail positif (22) et le rail négatif (24). La seconde unité de condensateur (28), le rail positif (22), le module d'onduleur (30), et le rail négatif (24) peuvent être connectés électriquement sous la forme d'une seconde boucle de courant.
PCT/CN2014/071843 2014-01-30 2014-01-30 Circuit d'entraînement de moteur et son dispositif WO2015113304A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/071843 WO2015113304A1 (fr) 2014-01-30 2014-01-30 Circuit d'entraînement de moteur et son dispositif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/071843 WO2015113304A1 (fr) 2014-01-30 2014-01-30 Circuit d'entraînement de moteur et son dispositif

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WO2015113304A1 true WO2015113304A1 (fr) 2015-08-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10218262B1 (en) 2017-09-25 2019-02-26 Otis Elevator Company Hybrid direct current link system for a regenerative drive
KR102666805B1 (ko) * 2017-09-25 2024-05-20 오티스 엘리베이터 컴파니 재생 드라이브를 위한 하이브리드 직류 링크 시스템

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5646498A (en) * 1995-08-07 1997-07-08 Eaton Corporation Conducted emission radiation suppression in inverter drives
CN1414692A (zh) * 2002-03-08 2003-04-30 北京利德华福技术有限公司 无谐波污染高压大功率变频器
CN101073197A (zh) * 2004-12-09 2007-11-14 大金工业株式会社 多相电流供给电路、驱动装置、压缩机及空气调和机
CN102422518A (zh) * 2009-06-04 2012-04-18 大金工业株式会社 功率转换装置
CN102739068A (zh) * 2011-03-31 2012-10-17 洛克威尔自动控制技术股份有限公司 接地方案识别方法
CN102761269A (zh) * 2012-06-30 2012-10-31 华为技术有限公司 功率单元及变频器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5646498A (en) * 1995-08-07 1997-07-08 Eaton Corporation Conducted emission radiation suppression in inverter drives
CN1414692A (zh) * 2002-03-08 2003-04-30 北京利德华福技术有限公司 无谐波污染高压大功率变频器
CN101073197A (zh) * 2004-12-09 2007-11-14 大金工业株式会社 多相电流供给电路、驱动装置、压缩机及空气调和机
CN102422518A (zh) * 2009-06-04 2012-04-18 大金工业株式会社 功率转换装置
CN102739068A (zh) * 2011-03-31 2012-10-17 洛克威尔自动控制技术股份有限公司 接地方案识别方法
CN102761269A (zh) * 2012-06-30 2012-10-31 华为技术有限公司 功率单元及变频器

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10218262B1 (en) 2017-09-25 2019-02-26 Otis Elevator Company Hybrid direct current link system for a regenerative drive
CN109599888A (zh) * 2017-09-25 2019-04-09 奥的斯电梯公司 再生驱动器的混合直流链路系统
JP2019062734A (ja) * 2017-09-25 2019-04-18 オーチス エレベータ カンパニーＯｔｉｓ Ｅｌｅｖａｔｏｒ Ｃｏｍｐａｎｙ 回生駆動のためのハイブリッド直流リンクシステム
EP3477849A1 (fr) * 2017-09-25 2019-05-01 Otis Elevator Company Système de liaison de courant continu hybride pour entraînement régénératif
KR102666805B1 (ko) * 2017-09-25 2024-05-20 오티스 엘리베이터 컴파니 재생 드라이브를 위한 하이브리드 직류 링크 시스템

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