KR950021864A - Rotor time constant measurement method of induction motor and its device - Google Patents

Rotor time constant measurement method of induction motor and its device Download PDF

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Publication number
KR950021864A
KR950021864A KR1019930027976A KR930027976A KR950021864A KR 950021864 A KR950021864 A KR 950021864A KR 1019930027976 A KR1019930027976 A KR 1019930027976A KR 930027976 A KR930027976 A KR 930027976A KR 950021864 A KR950021864 A KR 950021864A
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KR
South Korea
Prior art keywords
time constant
rotor
induction motor
phases
switch
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KR1019930027976A
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Korean (ko)
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KR970003821B1 (en
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김연태
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조말수
포항종합체철 주식회사
백덕현
재단법인산업과학기술연구소
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Application filed by 조말수, 포항종합체철 주식회사, 백덕현, 재단법인산업과학기술연구소 filed Critical 조말수
Priority to KR1019930027976A priority Critical patent/KR970003821B1/en
Publication of KR950021864A publication Critical patent/KR950021864A/en
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Publication of KR970003821B1 publication Critical patent/KR970003821B1/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
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

본 발명은 유도전동기의 회전자 시정수 측정수단과 관련된 것으로서, 종래에는 이러한 수단이 제각기 무부하 및 구속실험시에 전력 및 전압값을 구하고 삼상이 인가된 상태에서 억지로 회전자를 회전하지 못하도록 하는 구속상태로 유지시켜야 하는 등의 그 측정작업의 어려움과 많은 시간이 소용되는 등의 문제점이 있었다.The present invention relates to a rotor time constant measuring means of an induction motor. In the related art, these means obtain power and voltage values during no-load and restraint experiments, respectively, and are in a restrained state to prevent the rotor from being forcibly rotated in a state where three phases are applied. There were problems such as the difficulty of the measurement work such as to be maintained and a lot of time is used.

본 발명은 상기 예의 문제점을 개선할 수 있도록 유도전동기(11)의 삼상중 2상에는 직류원(15), 콘덴서(16), 스위치(14)를 구비시켜 스위치(14)의 순간 온오프동작에 의해 발생된 고정자축 전압과 순간전류등을 구하여 회전자 시정수치를 구하는 방법과, 이 스위치(14)수단과 관련하여 회전자시정수를 검출하는 시정수 검출기(12)와 시정수 계산기(13)로 이뤄진 시정수 측정장치를 제공코져 한것이다.The present invention includes a direct current source 15, a condenser 16, and a switch 14 in two of the three phases of the induction motor 11 so as to improve the problems of the above example. A method of obtaining the rotor time constant by calculating the generated stator shaft voltage and instantaneous current, and the time constant detector 12 and the time constant calculator 13 for detecting the rotor time constant in relation to the switch 14 means. It is to provide a time constant measuring device.

Description

유도전동기의 회전자 시정수측정방법 및 그 장치Rotor time constant measurement method of induction motor and its device

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

제1도는 본 발명에 의한 유도전동기의 특성파라미터를 측정하는 시스템의 일실시예도,1 is an embodiment of a system for measuring the characteristic parameters of the induction motor according to the present invention,

제2도는 제1도의 좀더 구체화한 회로 블럭도.2 is a more detailed circuit block diagram of FIG.

Claims (3)

유도전동기의 3상중 2상에는 직류원(15)과 콘덴서(16), 스위치(14)등을 구비시키고 이 스위치(14)의 순간 온 및 오프시에 발생된 전류를 ir(off)라 할때, ir(off)=Ioe-t/Tr……(1)를 구하고, 이때의 고정자축 전압파형을 V이라할때,을 구하며, 다시 상기 Tr은 스위치(14)오프시 전압 36.8%시점에서 회전자 시정수를 구하는 방법과, 상기 스위치(14)오프시 순간전압을 측정하여 그때 전압이 Vs(off)라 할때 상기(2)식으로 부터을 유도하고, 여기서 고정자 자화인덕턴스로 부터 구하는 방법을 특징으로 하는 유도전동기의 회전자 시정수 측정방법.Two of the three phases of the induction motor are provided with a DC source 15, a condenser 16, a switch 14 and the like, and when the current generated when the switch 14 is momentarily turned on and off is called ir (off), ir (off) = Ioe -t / Tr ... … (1) is obtained, and when the stator axis voltage waveform is V, Tr is a method of obtaining a rotor time constant at a voltage of 36.8% when the switch 14 is turned off, and measuring the instantaneous voltage at the time of the switch 14 being turned off, when the voltage is Vs (off). From (2) Where stator magnetization inductance Rotor time constant measurement method of an induction motor, characterized in that obtained by the method. 삼상유도전동기(11)의 삼상(a,b,c)중 2상(a,b)에는 직류원(15), 콘덴서(16), 스위치(14)를 구비시키고, 상기 2상(a,b)에는 유도전동기(11)의 고정자측에서 발생된 전압을 검출하는 회전자의 시정수 검출기(12)와, 이 시정수검출기(12)의 출력에 이어져서 회전자 시정수를 계산하는 시정수 계산기(13)를 일체로 갖는 유도전동기의 회전자 시정수측정장치.Two phases (a, b) of the three phases (a, b, c) of the three-phase induction motor 11 are provided with a DC source 15, a condenser 16, a switch 14, and the two phases (a, b) ) Includes a time constant detector 12 of the rotor for detecting the voltage generated on the stator side of the induction motor 11, and a time constant calculator for calculating the rotor time constant following the output of the time constant detector 12. Rotor time constant measuring apparatus of induction motor having integrally (13). 제2항에 있어서, 상기 시정수검출기(12)는 상기 2상(a,b)에 연결시킨 증폭기(12a)와 이 증폭기(12a)의 출력을 제공받는 신호 반전기(12b)및 레벨검출기(12c)와 이 신호반전기(12b) 및 레벨검출기(12c)의 출력을 비교하는 비교기(12d)로 되있고, 시정수계산기(13)는 비교기(12d)의 펄스폭출력이 한입력으로 제공되고 그 타측은 클럭발생기(13c)출력이 제공되는 앤드게이트(13a)와, 이 앤드 게이트(13a)의 출력에 이어져서 시정수를 디지탈로 표시하는 시정수 표시기(13b)로 구성된 것을 특징으로 하는 유도전동기의 회전자 시정수 측정장치.3. The time constant detector (12) according to claim 2, wherein the time constant detector (12) has an amplifier (12a) connected to the two phases (a, b), a signal inverter (12b) and a level detector (12) provided with the output of the amplifier (12a). 12c) and a comparator 12d for comparing the outputs of the signal inverter 12b and the level detector 12c. The time constant calculator 13 has a pulse width output of the comparator 12d provided as one input. The other side is composed of an AND gate 13a provided with a clock generator 13c output, and a time constant indicator 13b that displays the time constant digitally following the output of the AND gate 13a. Rotor time constant measuring device of electric motor. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930027976A 1993-12-16 1993-12-16 Rotor time constant measurement method and the apparatus KR970003821B1 (en)

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Application Number Priority Date Filing Date Title
KR1019930027976A KR970003821B1 (en) 1993-12-16 1993-12-16 Rotor time constant measurement method and the apparatus

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Application Number Priority Date Filing Date Title
KR1019930027976A KR970003821B1 (en) 1993-12-16 1993-12-16 Rotor time constant measurement method and the apparatus

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KR950021864A true KR950021864A (en) 1995-07-26
KR970003821B1 KR970003821B1 (en) 1997-03-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100451370B1 (en) * 2002-03-26 2004-10-06 엘지산전 주식회사 Induction motor rotor time constant estimation apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100451370B1 (en) * 2002-03-26 2004-10-06 엘지산전 주식회사 Induction motor rotor time constant estimation apparatus

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KR970003821B1 (en) 1997-03-22

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