KR950030457A - Motor DC Braking System for Pulse Width Modulation (PWM) Inverter - Google Patents

Motor DC Braking System for Pulse Width Modulation (PWM) Inverter Download PDF

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Publication number
KR950030457A
KR950030457A KR1019940008217A KR19940008217A KR950030457A KR 950030457 A KR950030457 A KR 950030457A KR 1019940008217 A KR1019940008217 A KR 1019940008217A KR 19940008217 A KR19940008217 A KR 19940008217A KR 950030457 A KR950030457 A KR 950030457A
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South Korea
Prior art keywords
motor
voltage
pulse width
inverter
switching means
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KR1019940008217A
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Korean (ko)
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KR100289710B1 (en
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이상룡
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이대원
삼성항공산업 주식회사
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Publication of KR950030457A publication Critical patent/KR950030457A/en
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    • 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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

본 발명은 펄스 폭 변조(PWM : pulse sidth modulation)인버터에 관한 것으로, 상세하게는 펄스 폭 변조에의한 인버터로 구동하는 교류 전동기를 직류 전류로 제동할 때, 전동기의 회전자계를 감소시키기 위한 인버터의 새로운 출력단의 직류 전류 제어 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulse width modulation (PWM) inverter, and more particularly, to an inverter for reducing a rotating magnetic field of a motor when an AC motor driven by an inverter by pulse width modulation is braked with a DC current. Of the new output stage of the direct current control device.

즉, 본 발명에 따른 펄스 폭 변조 인버터의 전동기 직류 제동 장치는 제어부로 전동기 제동시 출력단을 한데묶어 전동기에 의한 회전 자계를 감쇠시키고, 회전 자계에 의한 유도 전압을 감지하는 전압 감지부를 두어 전압이 일정 레벨로 떨어졌을 때, 전동기 제동용 직류 전류를 인가함으로써, 회전 자계의 감소가 빠르면서도, 직류 제동 개시 시점이 검출 유도 전압에 의해 자동 가변되어 출력 전류의 과대로 인한 인버터의 트립(trip)을 확실하게 방지할 수 있는 효과가 있다.That is, the motor DC braking device of the pulse width modulation inverter according to the present invention attenuates the rotating magnetic field by the motor by braking the output stages together with the control unit, and puts a voltage sensing unit for sensing the induced voltage by the rotating magnetic field so that the voltage is constant. When it falls to the level, by applying a motor braking direct current, the reduction of the rotating magnetic field is fast, and the start point of the DC braking is automatically variable by the detection induced voltage, thereby reliably tripping the inverter due to excessive output current. There is an effect that can be prevented.

Description

펄스 폭 변조(PWM) 인버터의 전동기 직류 제동 장치Motor DC Braking System for Pulse Width Modulation (PWM) Inverter

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명에 따른 PWM 인버터의 블록도, 제4도 및 제6도는 본 발명에 따른 PWM 인버터 브리지부의 직류 제동시의 전류 흐름도, 제8도는 본 발명에 따른 PWM 인버터의 직류 제동시 구동되는 교류 전동기를 직류 전류로 제동하기 위한 순서를 나타내는 플로우챠트.3 is a block diagram of a PWM inverter according to the present invention, FIGS. 4 and 6 are current flow charts during DC braking of the PWM inverter bridge unit according to the present invention, and FIG. 8 is driven during DC braking of the PWM inverter according to the present invention. Flow chart showing the procedure for braking an AC motor with DC current.

Claims (6)

역방향의 전압으로부터 그 자체를 보호하기 위한 병렬 연결된 프리 휠링 수단을 가지는 소정의 개 수의 브리지형으로 접속된 스위칭 수단과, 상기 스위칭 수단을 구동하기 위한 구동 수단과, 상기 구동수단에 펄스 폭 제어를 위한 펄스 폭 변조 발생 수단과, 그 부하로서 전동기를 구비하여 된 펄스 폭 변조 인버터의 전동기 직류 제동 장치에 있어서, 상기 브리지형의 스위칭 수단으로부터 상기 전동기의 회전에 의해 상기 브리지형의 스위칭 수단에 유기되는 유도 전압을 감지하기 위한 전압 감지 수단과, 상기 전압 감지 수단으로부터 출력된 전압을 소정의 기준 전압과 비교하여 주는 전압 비교 수단과, 상기 전압 비교 수단에서 출력된 비교 신호에 따라 상기 브리지형의 스위칭 수단을 제어하기 위한 신호를 제어 신호를 상기 구동 수단에 제공하는 제어 수단을 포함하여 된 것을 특징으로 하는 펄스 폭 변조 인버터의 전동기 직류 제동 장치.A predetermined number of bridged connected switching means having parallel connected freewheeling means for protecting itself from reverse voltage, drive means for driving the switching means, and pulse width control to the drive means. An electric motor DC brake apparatus of a pulse width modulated inverter provided with a pulse width modulation generating means and a motor as a load thereof, wherein the bridge type switching means is induced by rotation of the motor from the bridge switching means. Voltage sensing means for sensing an induced voltage, voltage comparing means for comparing the voltage output from the voltage sensing means with a predetermined reference voltage, and switching means of the bridge type according to the comparison signal output from the voltage comparing means. Providing a control signal to the driving means for a signal for controlling A motor direct current braking device for a pulse width modulated inverter, comprising means for example. 제1항에 있어서, 전압 감지부는 상기 전동기의 회전 자계에 의해 유기되는 유기 전압을 주파수로 변조하여 주는 주파수 변조 수단을 구비하는 점에 특징이 있는 펄스 폭 인버터의 전동기 직류 제동 장치.2. The motor DC brake device according to claim 1, wherein the voltage sensing unit includes frequency modulating means for modulating the induced voltage induced by the rotating magnetic field of the motor into a frequency. 제1항에 있어서, 전압 비교 수단은 상기 제어부 내에서 상기 주파수 변조 수단에서 출력된 주파수 변조 전압 신호의 클럭수를 카운트하여 기준 전압의 클럭수와 비교 판단하는 프로그램 형태로 된 것을 특징으로 하는 펄스 폭 인버터의 전동기 직류 제동 장치.2. The pulse width of claim 1, wherein the voltage comparing means has a pulse width in the control unit in which the clock number of the frequency modulated voltage signal output from the frequency modulating means is counted and compared with the clock number of the reference voltage. DC motor braking device of the inverter. 제1항에 있어서, 제어 수단은, 상기 브리지형의 스위칭 수단의 소정의 시간 동안 출력 차단시 이 스위칭 수단의 브리지 일측부의 스위칭 수단은 전부 온 시키고 다른 일측부는 전부 오프시키거나 또는 그 반대로 하도록 제어하는 점에 특징이 있는 펄스 폭 인버터의 전동기 직류 제동 장치.The control means according to claim 1, wherein the control means controls the switching means of one side of the bridge of the switching means to be turned on and the other side to be turned off or vice versa when the output is interrupted for a predetermined time of the bridge type switching means. DC motor braking device for pulse width inverters characterized by 제1항에 있어서, 제어 수단은, 소정의 시간 동안 상기 스위칭 수단의 출력을 차단하여 상기 전동기의 회전 자계에 의한 유도 전압이 소정의 값으로 떨어진 다음, 상기 전동기 제동용 직류 전류 인가시, 상기 스위칭 수단들의 브리지 일측부의 하나의 스위칭 수단은 오프시키고, 상기 브리지의 다른 일측부에서는 상기 오프된 스위칭 수단가 직렬 접속된 스위칭 수단만 온 시키는 제어를 하는 점에 특징이 있는 펄스 폭 인버터의 전동기 직류 제동 장치.The switching device according to claim 1, wherein the control means cuts off the output of the switching means for a predetermined time so that the induced voltage by the rotating magnetic field of the motor drops to a predetermined value, and then, when the DC current for braking the motor is applied, the switching. The motor direct current braking device of the pulse width inverter, characterized in that one switching means on one side of the bridge of the means is turned off, and on the other side of the bridge, the off switching means controls only the switching means connected in series. . 제1항에 있어서, 전압 비교 수단의 상기 소정의 기준 전압은 상기 전동기의 회전자계에 의한 유도 전압이 상기 전동기 제동용 직류 전류를 인가할 수 있을 만큼 떨어졌을 때의 전압이 상기 전압 감지 수단에 감지된 값보다 소정의 크기만큼 작은 값으로 설정된 것을 특징으로 하는 펄스 폭 인버터의 전동기 직류 제동 장치.2. The voltage detecting means of claim 1, wherein the predetermined reference voltage of the voltage comparing means detects a voltage when the induced voltage by the rotating magnetic field of the motor drops enough to apply the electric motor braking direct current. An electric motor DC brake of a pulse width inverter, characterized in that it is set to a value smaller than a predetermined value. ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019940008217A 1994-04-19 1994-04-19 Dc braking apparatus for braking motor of pulse width modulation inverter KR100289710B1 (en)

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KR1019940008217A KR100289710B1 (en) 1994-04-19 1994-04-19 Dc braking apparatus for braking motor of pulse width modulation inverter

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KR1019940008217A KR100289710B1 (en) 1994-04-19 1994-04-19 Dc braking apparatus for braking motor of pulse width modulation inverter

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100320179B1 (en) * 1999-02-01 2002-01-10 구자홍 Speed control apparatus by variable frequency for induction motor
KR100497547B1 (en) * 2001-05-18 2005-06-23 마츠시타 덴끼 산교 가부시키가이샤 Inverter apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100408063B1 (en) * 2001-07-09 2003-12-03 엘지전자 주식회사 Braking method of washing machine using sensorless bldc motor
JP5372705B2 (en) * 2009-11-04 2013-12-18 株式会社日立産機システム Power converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100320179B1 (en) * 1999-02-01 2002-01-10 구자홍 Speed control apparatus by variable frequency for induction motor
KR100497547B1 (en) * 2001-05-18 2005-06-23 마츠시타 덴끼 산교 가부시키가이샤 Inverter apparatus

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