WO2019244252A1 - Dispositif de commande de moteur - Google Patents

Dispositif de commande de moteur Download PDF

Info

Publication number
WO2019244252A1
WO2019244252A1 PCT/JP2018/023328 JP2018023328W WO2019244252A1 WO 2019244252 A1 WO2019244252 A1 WO 2019244252A1 JP 2018023328 W JP2018023328 W JP 2018023328W WO 2019244252 A1 WO2019244252 A1 WO 2019244252A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
detection element
current detection
control device
voltage
Prior art date
Application number
PCT/JP2018/023328
Other languages
English (en)
Japanese (ja)
Inventor
裕司 砂田
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2018/023328 priority Critical patent/WO2019244252A1/fr
Priority to JP2020525127A priority patent/JP7023357B2/ja
Publication of WO2019244252A1 publication Critical patent/WO2019244252A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • 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 present invention relates to a motor control device that controls driving of a motor.
  • a three-phase inverter control circuit for realizing a motor control device for controlling a three-phase motor has been composed of six switching elements for switching and a drive circuit thereof, and a resistor called a shunt resistor for detecting a bus current.
  • a resistor called a shunt resistor for detecting a bus current For example, see Patent Document 1.
  • six switching elements for switching and their driving circuits have been concentrated in a module called an inverter power module.
  • the shunt resistor of the motor control device is installed outside the inverter power module.If a large current flows through the shunt resistor, heat is generated.Therefore, use a cement resistor that supports high power as the shunt resistor, or use a chip resistor Has been implemented by implementing a plurality of in parallel. However, the cement resistor corresponding to high power has a large size, and an inductance component parasitic between the wiring patterns and the resistance may increase to cause a malfunction. In addition, by mounting a plurality of chip resistors in parallel, the pattern area per circuit is increased, and the size of the substrate and the design of the substrate pattern are restricted.
  • the present invention has been made in view of the above, and an object of the present invention is to provide a motor control device capable of detecting a bus current with a reduced circuit scale.
  • the present invention provides an upper arm and lower arm switching element for converting a DC voltage to an AC voltage and outputting the AC voltage to a motor, and a driving circuit for driving the switching element. And a current detection element connected to the switching element and detecting a bus current flowing through the switching element. Furthermore, the present invention includes an arithmetic unit that outputs a signal for controlling the switching element to the drive circuit based on a detection value of the current detection element.
  • the motor control device has an effect that the bus current can be detected while suppressing the circuit scale.
  • FIG. 1 is a block diagram illustrating a configuration of a motor control device according to a first embodiment of the present invention.
  • Time chart for explaining the operation of the motor control device according to the first embodiment
  • FIG. 4 is a block diagram illustrating a configuration of a motor control device according to a second embodiment of the present invention.
  • Time chart for explaining the operation of the motor control device according to the second embodiment
  • FIG. 3 is a block diagram illustrating a configuration of a motor control device according to a third embodiment of the present invention.
  • 4 is a graph illustrating a relationship between a loss of the current detection element according to the third embodiment and a bus current.
  • FIG. 9 is a graph showing the relationship between the loss of the current detection element according to the third embodiment and the potential difference between both ends and the bus current.
  • FIG. 2 is a block diagram illustrating a configuration of an MCU according to the first to third embodiments.
  • FIG. 1 is a block diagram illustrating a configuration of the motor control device 101 according to the first embodiment of the present invention.
  • the motor control device 101 includes a bridge diode 2, a main circuit capacitor 3, a changeover switch 14 for switching a cutoff set value, an inverter power module 4, and an arithmetic unit 8 which is an MCU (Micro Controller Unit). .
  • An AC power supply 1 is connected to a bridge diode 2, and an inverter power module 4 drives a motor 5.
  • the inverter power module 4 includes switching elements 4a to 4f and a control IC 4g which is a drive circuit for driving the switching elements 4a to 4f.
  • the switching elements 4a to 4f are composed of upper arm switching elements 4a to 4c and lower arm switching elements 4d to 4f.
  • Each of the switching elements 4a to 4f includes a bootstrap capacitor and a backflow prevention diode.
  • the voltage from the AC power supply 1 is rectified by the bridge diode 2, and the main circuit capacitor 3 is charged.
  • the rectified voltage is smoothed, and a bus voltage of a DC voltage based on the main circuit GND (ground) 6 is generated.
  • the bus voltage is a voltage of the bus voltage terminal 7 based on the main circuit GND6.
  • the power supply voltage 13a is a power supply voltage of the control IC 4g.
  • the arithmetic unit 8 outputs signals 9a to 9f, which are various signal patterns each instructing ON or OFF, to the control IC 4g of the inverter power module 4.
  • the control IC 4g generates drive signals for driving the switching elements 4a to 4f based on the signals 9a to 9f, which are switching signals for inverter control, and applies the generated drive signals to the switching elements 4a to 4f. That is, in accordance with the signals 9a to 9f, the switching elements 4a to 4f are controlled by the control IC 4g such that the switching elements 4a to 4f are turned on or off with an appropriate time width by the power supply voltage 13a and the gate voltage determined by the control GND 15. . As a result, an appropriate voltage is applied to the motor 5 based on the bus voltage, and an appropriate current flows. In order to apply an appropriate voltage to the motor 5 and allow an appropriate current to flow, it is necessary to detect the rotation state of the motor 5.
  • the current detection element 4h is installed inside the inverter power module 4.
  • the current detection element 4h according to the first embodiment is not configured only with a resistance element.
  • a specific example of the current detection element 4h is a current detection element that detects a current using a magnetic flux such as DCCT (Direct Current Current Trans).
  • DCCT Direct Current Current Trans
  • the current detection element 4h detects the bus current 12, so that the rotation state of the motor 5 is grasped.
  • the bus current 12 flows from the main circuit capacitor 3 via the bus voltage terminal 7 to the switching elements 4a to 4f and the motor 5, and finally to the main circuit capacitor 3 via the terminal of the main circuit capacitor 3 on the main circuit GND6 side. It is fed back to the circuit capacitor 3.
  • the current detection element 4h When detecting the value of the bus current 12, the current detection element 4h notifies the control IC 4g of a signal 4j indicating the detected current value.
  • the signal 4j which is the current detection signal, is notified to the arithmetic unit 8 as a signal 4p amplified by the amplifier 4t in the control IC 4g. Further, the signal 4j may be notified to the arithmetic unit 8 as it is.
  • the control IC 4g also notifies the arithmetic unit 8 of a cutoff signal 4k indicating cutoff of the operation of the switching elements 4a to 4f, which is a stop of the inverter operation.
  • the changeover switch 14 selects one of the voltage based on the signal 11 which is the cutoff setting signal from the arithmetic unit 8 and the voltage from the power supply voltage 13b and applies the selected voltage to the control IC 4g, so that the drive signal from the control IC 4g is A cutoff set value 4n, which is a current threshold value for stopping output, is set.
  • the cutoff set value 4n is a current threshold value for stopping the inverter operation of the switching elements 4a to 4f in order to prevent the bus current 12 from becoming an overcurrent, and fluctuates according to the voltage value given by the changeover switch 14. That is, the cutoff set value 4n is held by the control IC 4g and is a set value that is variable by the power supply voltage 13b or the signal 11.
  • the cutoff set value 4n is a threshold for the signal 4j indicating the current value of the bus current 12, but may be a threshold for the signal 4p amplified by the amplifier 4t.
  • the changeover switch 14 is installed outside the inverter power module 4, but may be installed inside.
  • the power supply voltage 13b may be the same as or different from the power supply voltage 13a.
  • the motor control device 101 If the motor 5 is overloaded during the operation of the inverter, or if the line between the motors 5 is short-circuited, the bus current 12 increases.
  • the current detecting element 4h detects the increased bus current 12, and when the signal 4j indicating the detected current value reaches the cutoff set value 4n, the control IC 4g stops all or some of the switching elements 4a to 4f and , And outputs the cutoff signal 4k to the arithmetic unit 8.
  • the arithmetic unit 8 stops outputting the signals 9a to 9f to the control IC 4g.
  • FIG. 2 is a time chart for explaining the operation of the motor control device 101 according to the first embodiment. According to the motor control device 101, the following operation is possible.
  • the control IC 4g of the inverter power module 4 performs a power-on reset, which is an initialization operation based on a reset signal generated internally when the power is turned on.
  • the cutoff set value 4n is set to a low value in the control IC 4g.
  • the cutoff set value 4n is set to a value desired to be set at the time of activation.
  • the cutoff set value 4n is switched to a higher set value corresponding to the ⁇ connection.
  • the cutoff set value 4n is set to a low value again.
  • the cutoff set value 4n can be held inside the inverter power module 4.
  • signal processing for stopping the operation of the switching elements 4a to 4f can be performed inside the inverter power module 4.
  • the distance between the control IC 4g and the current detection element 4h can be shortened, and the length of the signal line of the signal 4j can be shortened. Therefore, the pattern design of the control board is also facilitated, the number of components around the inverter power module 4 can be reduced, and the board size can be reduced. That is, the development load and cost can be reduced.
  • the resistance component, the inductance component, and the capacitor component generated in the wiring pattern are reduced, and the operation of the motor control device 101 can be stabilized.
  • FIG. FIG. 3 is a block diagram illustrating a configuration of the motor control device 102 according to the second embodiment of the present invention.
  • the current detection element 4h of the motor control device 101 according to the first embodiment is replaced with a current detection element 4q that is a switching element.
  • a specific example of the current detection element 4q is a MOS-FET (Metal Oxide Semiconductor-Field Effect Transistor) having a higher breakdown voltage and a lower loss than the switching elements 4a to 4f.
  • MOS-FET Metal Oxide Semiconductor-Field Effect Transistor
  • the control IC 4g detects the value of the bus current 12 by causing the control IC 4g to detect a voltage value generated by a resistance value between the drain and the source when a current flows through the current detection element 4q as a signal 4j.
  • the signal 41 from the control IC 4g changes the gate voltage, thereby turning on or off the current detection element 4q.
  • the bus current 12 After the inverter power module 4 is mounted on the control board, if there is a defect that some or all of the switching elements 4a to 4f are short-circuited, the bus current 12 from the main circuit capacitor 3 The current value increases.
  • the current detection element 4h is used as in the first embodiment, a cooperative design between the fuse 10 and the inverter power module 4 is required to prevent heat generation due to the line resistance of each wiring until the fuse 10 is blown.
  • the current detection element 4q which is a switching element is used, the bus current 12 can be cut off by turning off the current detection element 4q. That is, since a means for interrupting the bus current 12 is provided in addition to the fuse 10, a cooperative design between the fuse 10 and the inverter power module 4 becomes unnecessary.
  • FIG. 4 is a time chart for explaining the operation of the motor control device 102 according to the second embodiment. According to the motor control device 102, the following operation is possible.
  • the startup sequence of the inverter power module 4 will be described with reference to FIG.
  • the voltage from the AC power supply 1 is rectified by the bridge diode 2, and the main circuit capacitor 3 is charged.
  • the rectified voltage is smoothed, and a bus voltage that is a DC voltage of the bus voltage terminal 7 with respect to the main circuit GND6 is generated.
  • the power supply voltage 13a may be generated and reach the maximum value before the bus voltage reaches the maximum value.
  • the state of the protection register (not shown) provided inside the control IC 4g transitions from the High level to the Low level.
  • the control IC 4g changes the gate voltage of the current detection element 4q at time t5 by changing the signal 41 to turn on the current detection element 4q.
  • the signal 41 is a signal for instructing the ON state or the OFF state of the current detection element 4q.
  • the control IC 4g notifies the arithmetic unit 8 that the inverter operation is possible by switching the cutoff signal 4k from the Low level indicating the cutoff state to the High level indicating the non-cutoff state.
  • the arithmetic unit 8 notified that the inverter operation is possible sends a signal pattern indicating the inverter operation to the control IC 4g using the signals 9a to 9f.
  • the startup sequence of the inverter power module 4 is executed.
  • the control IC 4g Outputs the cutoff signal 4k indicating the cutoff state to the arithmetic unit 8 and changes the signal 41.
  • the control IC 4g changes the gate voltage of the current detection element 4q by changing the signal 41 to control the current detection element 4q to be in the off state. By turning off the current detection element 4q, it is possible to prevent the excessive bus current 12 from continuing to flow.
  • FIG. 5 is a block diagram illustrating a configuration of the motor control device 103 according to the third embodiment of the present invention.
  • the current detection element 4q of the motor control device 102 according to the second embodiment is replaced with a current detection element 4s.
  • the current detecting element 4s has a configuration in which switching elements having different characteristics of loss generated with respect to current are connected in parallel.
  • the current detection element 4s has a configuration in which a MOS-FET 41 and an IGBT (Insulated Gate Bipolar Transistor) 42 are connected in parallel.
  • the control IC 4g detects the value of the bus current 12 by causing the control IC 4g to detect a voltage value generated at both ends of the parallel connection as a signal 4j when a current flows through the current detection element 4s.
  • a changeover switch 4 r connected to the gate electrode of the MOS-FET 41 and the base of the IGBT 42 is provided in the inverter power module 4.
  • the changeover switch 4r can switch which of the MOS-FET 41 and the IGBT 42 is turned on based on the signal 41 from the control IC 4g.
  • the changeover switch 4r can also turn on both the MOS-FET 41 and the IGBT 42 based on the signal 41 from the control IC 4g.
  • FIG. 6 is a graph showing the relationship between the loss of the current detection element 4s and the bus current 12 according to the third embodiment.
  • the loss generated between the drain and the source of the MOS-FET 41 is a value obtained by multiplying the resistance between the drain and the source by the square of the value of the bus current 12. Therefore, when the bus current 12 flowing to the current detection element 4s flows into the MOS-FET 41 by the changeover switch 4r, the relationship between the bus current 12 and the loss of the current detection element 4s changes in a quadratic function.
  • the loss due to the IGBT 42 is a value obtained by multiplying the saturation voltage Vce_sat generated between the collector and the emitter of the IGBT 42 by the value of the bus current 12. Therefore, when the bus current 12 flowing through the current detection element 4s flows into the IGBT 42 by the changeover switch 4r, the relationship between the bus current 12 and the loss of the current detection element 4s changes in a linear function.
  • FIG. 6 there is a value i1 of the bus current 12 where the magnitude relation of the loss value is reversed due to the difference between the behavior of the linear function and the behavior of the quadratic function. Therefore, switching elements having different loss characteristics, such as the current detection element 4s, are arranged in parallel, and further, a changeover switch 4r is provided to switch the element to be used when the bus current 12 becomes the value i1 to the smaller loss. As a result, the occurrence of loss can be effectively suppressed.
  • the control of the changeover switch 4r may be performed by either the control IC 4g or the arithmetic unit 8.
  • FIG. 7 is a graph showing the relationship between the bus current 12 and the loss of the current detection element 4s according to the third embodiment, the potential difference between both ends.
  • the vertical axis of FIG. 7 shows the loss of the current detection element 4s and also shows the potential difference generated at both ends of the path of the bus current 12 of the current detection element 4s.
  • the changeover switch 4r switches so as not to use the element in which the potential difference generated at both ends of the current detection element 4s becomes smaller than the SN ratio allowable value. . That is, in a region of a small potential difference where the SN ratio deteriorates, the switching is performed by the changeover switch 4r so as to use the element having the potential difference equal to or larger than the SN ratio allowable value.
  • the IGBT 42 is used when the bus current 12 is smaller than the value i0 and when the bus current 12 is larger than the value i1.
  • FIG. 8 is a block diagram showing a configuration of the MCU 30 according to the first to third embodiments.
  • the arithmetic unit 8 is realized by the MCU 30.
  • the MCU 30 includes a CPU (Central Processing Unit) 31 for executing calculation and control, a RAM (Random Access Memory) 32 used by the CPU 31 for a work area, a ROM (Read Only Memory) 33 for storing programs and data, and an external device.
  • the system includes an I / O (Input / Output) 34 which is hardware for exchanging signals, and a peripheral device 35 including an oscillator for generating a clock.
  • the control executed by the computing unit 8 described in the first to third embodiments is realized by the CPU 31 executing a program that is software stored in the ROM 33.
  • the ROM 33 may be a nonvolatile memory such as a rewritable flash memory.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inverter Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

L'invention concerne un dispositif de commande de moteur (101) comprenant un module de puissance d'onduleur (4) qui comporte : des éléments de commutation (4a à 4f) destinés à un bras supérieur et à un bras inférieur, qui sont destinés à convertir une tension continue en une tension alternative et à soumettre un moteur (5) à la tension alternative ; un circuit intégré de commande (4g), qui active les éléments de commutation (4a à 4f) ; et un élément de détection de courant électrique (4h), qui est connecté aux éléments de commutation (4a à 4f) de façon à détecter un courant de bus circulant à travers les éléments de commutation (4a à 4f). Le dispositif de commande de moteur (101) est en outre pourvu d'une unité de calcul (8) qui soumet des signaux (9a à 9f), utilisés par le circuit intégré de commande (4g) pour commander les éléments de commutation (4a à 4f), au circuit intégré de commande (4g), en fonction d'une valeur détectée de l'élément de détection de courant électrique (4h).
PCT/JP2018/023328 2018-06-19 2018-06-19 Dispositif de commande de moteur WO2019244252A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2018/023328 WO2019244252A1 (fr) 2018-06-19 2018-06-19 Dispositif de commande de moteur
JP2020525127A JP7023357B2 (ja) 2018-06-19 2018-06-19 モータ制御装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/023328 WO2019244252A1 (fr) 2018-06-19 2018-06-19 Dispositif de commande de moteur

Publications (1)

Publication Number Publication Date
WO2019244252A1 true WO2019244252A1 (fr) 2019-12-26

Family

ID=68983898

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/023328 WO2019244252A1 (fr) 2018-06-19 2018-06-19 Dispositif de commande de moteur

Country Status (2)

Country Link
JP (1) JP7023357B2 (fr)
WO (1) WO2019244252A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6043094A (ja) * 1983-08-17 1985-03-07 Mitsubishi Electric Corp エレベ−タの故障時運転装置
JPH04340322A (ja) * 1991-05-14 1992-11-26 Mitsubishi Electric Corp 短絡保護回路
JPH0984280A (ja) * 1995-09-14 1997-03-28 Fujitsu Ltd 電源監視回路
JP2009055693A (ja) * 2007-08-27 2009-03-12 Hitachi Ltd 電力変換装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4340322B1 (ja) 2008-07-16 2009-10-07 株式会社野村総合研究所 グループメンバの位置情報共有システム
JP6043094B2 (ja) 2012-05-30 2016-12-14 辛東主 商品陳列情報集計システム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6043094A (ja) * 1983-08-17 1985-03-07 Mitsubishi Electric Corp エレベ−タの故障時運転装置
JPH04340322A (ja) * 1991-05-14 1992-11-26 Mitsubishi Electric Corp 短絡保護回路
JPH0984280A (ja) * 1995-09-14 1997-03-28 Fujitsu Ltd 電源監視回路
JP2009055693A (ja) * 2007-08-27 2009-03-12 Hitachi Ltd 電力変換装置

Also Published As

Publication number Publication date
JP7023357B2 (ja) 2022-02-21
JPWO2019244252A1 (ja) 2020-12-17

Similar Documents

Publication Publication Date Title
US9059709B2 (en) Gate drive circuit for transistor
JP6822907B2 (ja) 半導体装置、電力変換装置、駆動装置、車両、及び、昇降機
JP2008078816A (ja) 電圧駆動型半導体素子の駆動方法、及び、ゲート駆動回路
JP6349855B2 (ja) 駆動装置
JPWO2019038957A1 (ja) 制御回路および電力変換装置
JP2017079534A (ja) ゲート制御回路
JP2005223308A (ja) 半導体装置および半導体装置モジュール
JP2019110431A (ja) 半導体装置およびパワーモジュール
JP7205091B2 (ja) 半導体装置
US9490794B1 (en) Dynamic shutdown protection circuit
JP2017224999A (ja) 半導体スイッチング素子の保護回路
JP6950828B2 (ja) 駆動回路内蔵型パワーモジュール
JP2007143336A (ja) 半導体装置
WO2019244252A1 (fr) Dispositif de commande de moteur
JP2008043003A (ja) 電圧駆動型半導体素子のゲート駆動装置
JP2005304176A (ja) モータ駆動装置
JP2016213659A (ja) 半導体スイッチ回路
JP2007189828A (ja) 半導体素子の駆動回路
JP6642074B2 (ja) スイッチング素子の駆動装置
JP2006129643A (ja) スイッチング制御装置及び半導体集積回路装置
JP2020150739A (ja) ゲート駆動回路
JP2009060709A (ja) ゲート駆動回路
JP6753348B2 (ja) スイッチング素子の駆動回路
JP4487604B2 (ja) 電力変換装置
US20220014087A1 (en) Switching control circuit, drive control device, and switching control method

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18923670

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2020525127

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18923670

Country of ref document: EP

Kind code of ref document: A1