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1. (CN107155353) Electric motor diagnosis device

Office : China
Application Number: 201580065394.1 Application Date: 31.03.2015
Publication Number: 107155353 Publication Date: 12.09.2017
Publication Kind : A
Prior PCT appl.: Application Number:PCTJP2015060055 ; Publication Number: Click to see the data
IPC:
G01R 31/34
G01R 31/02
H02P 23/00
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31
Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
34
Testing dynamo-electric machines
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31
Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
02
Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
P
CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS OR REACTORS OR CHOKE COILS
23
Arrangements or methods for the control of ac-motors characterised by a control method other than vector control
Applicants: MITSUBISHI ELECTRIC CORPORATION
Inventors: MIYAUCHI TOSHIHIKO
KANEMARU MAKOTO
MORI MITSUGI
TSUKIMA MITSURU
Priority Data: 2014-249621 10.12.2014 JP
Title: (EN) Electric motor diagnosis device
(ZH) 电动机的诊断装置
Abstract: front page image
(EN) Short-circuit diagnosis devices for electric motor stator windings have had a problem wherein because calculation parameters are influenced by load torque fluctuation, power imbalance, and contact failure, it is difficult to correctly and highly accurately detect a winding short-circuit. The present invention is provided with a logical operation unit (10) that receives the output of a current detection circuit (9) for detecting the current of an electric motor (6) and a voltage detection circuit (8) for detecting the voltage of the electric motor (6) and a display unit (13) and external output unit (15) for respectively providing an abnormality indication and external notification when the logical operation unit (10) detects an abnormality in the electric motor. Through voltage and current analysis of the electric motor, the logical operation unit (10) distinguishes power supply imbalance and identifies and detects a winding short circuit on the basis of reverse-phase current, reverse-phase voltage, positive-phase current, and reverse phase admittance even if a load torque varies while the electric motor is operating.
(ZH) 本发明的技术问题是:在电动机的定子绕组的短路诊断装置中,由于负载转矩变化、电源不平衡、接触不良故障,会影响计算参数,其结果难以高精度地正确检测绕组短路故障。本发明的电动机的诊断装置包括:检测电动机(6)的电流的电流检测电路(9);输入来自检测电动机(6)的电压的电压检测电路(8)的输出并对电动机的绕组短路异常进行判定的逻辑运算部(10);在逻辑运算部(10)检测出电动机异常时显示异常情况的显示部(13);以及将异常情况通知给外部的外部输出部(15),逻辑运算部(10)通过电动机的电压和电流分析,根据反相电流、反相电压、正相电流、反相导纳,即使在电动机运行中负载转矩发生变化时也对电源不平衡进行区分,从而判定并检测绕组短路。
Also published as:
JPWO2016092871KR1020170074986JP6099852EP3232215IN201747019235ID2018/00730
TH1701001492AWO/2016/092871