JPS57166852A - Rotor malfunction detector - Google Patents

Rotor malfunction detector

Info

Publication number
JPS57166852A
JPS57166852A JP56051143A JP5114381A JPS57166852A JP S57166852 A JPS57166852 A JP S57166852A JP 56051143 A JP56051143 A JP 56051143A JP 5114381 A JP5114381 A JP 5114381A JP S57166852 A JPS57166852 A JP S57166852A
Authority
JP
Japan
Prior art keywords
frequency
detecting
pulsating
rotor
shaft voltage
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP56051143A
Other languages
Japanese (ja)
Inventor
Toshiharu Fujiwara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56051143A priority Critical patent/JPS57166852A/en
Publication of JPS57166852A publication Critical patent/JPS57166852A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Induction Machinery (AREA)

Abstract

PURPOSE:To enhance the workability and the reliability of a rotor by detecting a slip frequency and a pulsating frequency of shaft voltage, comparing them and detecting a malfunction when the pulsating frequency becomes twice the slip frequency, thereby early detecting the malfunction of the rotor. CONSTITUTION:A shaft voltage detecting voltmeter 5 is mounted on the rotational shaft of an induction motor 1, and the pulsating frequency of the shaft voltage is detected by a detector 6 from the output of the voltmeter 5. On the other hand, the output from a tachometer 3 connected to the motor 1 and the output from a power source frequency meter 8 connected to a power source 1a are inputted to an arithmetic unit 4, which thus calculates the slip frequency of the motor 1. Further, the unit 4 compares the pulsating frequency of the shaft voltage with the slip frequency, judges as the production of a crack at the rotor conductor when the pulsating frequency becomes twice the slip frequency, thereby detecting the malfunction.
JP56051143A 1981-04-07 1981-04-07 Rotor malfunction detector Pending JPS57166852A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56051143A JPS57166852A (en) 1981-04-07 1981-04-07 Rotor malfunction detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56051143A JPS57166852A (en) 1981-04-07 1981-04-07 Rotor malfunction detector

Publications (1)

Publication Number Publication Date
JPS57166852A true JPS57166852A (en) 1982-10-14

Family

ID=12878596

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56051143A Pending JPS57166852A (en) 1981-04-07 1981-04-07 Rotor malfunction detector

Country Status (1)

Country Link
JP (1) JPS57166852A (en)

Similar Documents

Publication Publication Date Title
SE8503106L (en) SET AND APPARATUS FOR PUMP DEVICE PROTECTION
GB1178629A (en) System for Measurement of Properties on a Rotating Body
SE8701478D0 (en) SET TO DETECT LOSA STATOR WINDOWS IN A ROTATING ELECTRIC MACHINE AND ACOUSTIC MONITORING DEVICE FOR THE DETECTION OF STATOR COOLING IN A ROTATING ELECTRIC MACHINE
JPS57166852A (en) Rotor malfunction detector
JPS57141526A (en) Compensating device for detected torque of electric dynamometer
JPS5768643A (en) Electric motor
SE9402353D0 (en) Procedure for determining torque requirements
JPS57206298A (en) Torque detecting device for inverter driven three-phase induction motor
JPS56153959A (en) Induction machine
JPS57113751A (en) Detector for abnormality of rotor
SU1092437A2 (en) Method of indirect checking of electrical machine air gap non-uniformity
JPS57186952A (en) Monitor for electric rotary machine
JPS55107905A (en) Detector for position and speed of electric motor
DE3463977D1 (en) Process and device for measuring motor slip
JPS5621748A (en) Contact detector
JPS5543963A (en) Motor controller
JPS6486069A (en) Method for diagnosing abnormality of rotational speed detector of electric motor
JPS5753262A (en) Monitor for operation of centrifuge
JPS57148557A (en) Irregular rotation predicting device for rotary electric machine
JPS55159165A (en) Slip detector of induction generator
JPS56108929A (en) Electric dynamometer of torsion shaft type
JPS5661628A (en) Electric dynamometer for testing internal-combustion engine or the like
JPS55162025A (en) Coupling fault detector for rotary shaft system
JPS5714712A (en) Detector for physical quantity
JPS5377551A (en) Position detecting mechanism inspecting apparatus