JPS54150655A - Detecting trouble of induction motor - Google Patents
Detecting trouble of induction motorInfo
- Publication number
- JPS54150655A JPS54150655A JP5936078A JP5936078A JPS54150655A JP S54150655 A JPS54150655 A JP S54150655A JP 5936078 A JP5936078 A JP 5936078A JP 5936078 A JP5936078 A JP 5936078A JP S54150655 A JPS54150655 A JP S54150655A
- Authority
- JP
- Japan
- Prior art keywords
- current
- induction motor
- primary
- component
- signal
- 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.)
- Granted
Links
Landscapes
- Protection Of Generators And Motors (AREA)
Abstract
PURPOSE: To detect a trouble of the primary or secondary side of an induction motor, by detecting one optional phase current of each of the primary and secondary sides of the induction motor and processing the wave form of the current to detect primary and secondary current components.
CONSTITUTION: A primary current probe 3 is used to detect one optional phase (V1) current of the primary side of the induction motor 1. The detected current signal is changed into an envelope form 8a through a detection circuit 7 and an envelope circuit 8. The envelope form 8a is entered into a band-pass filter 9 to pick out a pulsating component 2sf. This component is converted into a DC signal by an AC-DC converter 10 to obtain a 2sf level 10a. One optional phase (V2) current of the secondary side of the induction motor 1 is then detected by a secondary current probe 5. The detected current signal 5' is applied to a band-pass filter 11 to pick out a 2f(1-a) component. This component is converted into a DC signal by a converter 12 to obtain a 2f(1-a) level 12a. The output levels 10a, 12a are displaced by an indicator 13.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5936078A JPS54150655A (en) | 1978-05-18 | 1978-05-18 | Detecting trouble of induction motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5936078A JPS54150655A (en) | 1978-05-18 | 1978-05-18 | Detecting trouble of induction motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54150655A true JPS54150655A (en) | 1979-11-27 |
JPS6117211B2 JPS6117211B2 (en) | 1986-05-06 |
Family
ID=13111013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5936078A Granted JPS54150655A (en) | 1978-05-18 | 1978-05-18 | Detecting trouble of induction motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54150655A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5678169U (en) * | 1979-11-22 | 1981-06-25 |
-
1978
- 1978-05-18 JP JP5936078A patent/JPS54150655A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5678169U (en) * | 1979-11-22 | 1981-06-25 |
Also Published As
Publication number | Publication date |
---|---|
JPS6117211B2 (en) | 1986-05-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5733355A (en) | Digital speed detector | |
JPS57142568A (en) | Earth trouble detecting device for dc power transmission system | |
JPS53114608A (en) | Defect detector | |
JPS54150655A (en) | Detecting trouble of induction motor | |
JPS54150656A (en) | Detecting trouble of induction motor | |
JPS5343571A (en) | Electric current detector | |
JPS54150657A (en) | Detecting trouble of induction motor | |
JPS5612568A (en) | Body detecting device | |
JPS54149849A (en) | Open-phase protective relay | |
JPS55127885A (en) | Method for detecting missing phase in output of three- phase inverter | |
SU1455376A1 (en) | Apparatus for differential current protection of conversion transformer | |
JPS5315169A (en) | 3-phase ac detection circuit | |
JPS5717236A (en) | Detector for synchronism | |
JPS641348A (en) | Transmitter-receiver | |
JPS5481062A (en) | Relay | |
JPS5596432A (en) | Pressure detector | |
JPS5611365A (en) | Remote measuring method for resistance value of balance cable | |
JPS6378278U (en) | ||
JPS5684567A (en) | Detector for partial discharge | |
JPS54147442A (en) | Relay inspection system for second harmonic detection | |
JPS5725730A (en) | Detecting device of noise intensity | |
JPS5626254A (en) | Eddy current flaw detector | |
JPS55166001A (en) | Position detector | |
JPS54140125A (en) | Brushless exciting device | |
JPS5446320A (en) | Detecting method of slip or slip frequency |