JPS5679958A - Rotating speed detector of electric motor - Google Patents
Rotating speed detector of electric motorInfo
- Publication number
- JPS5679958A JPS5679958A JP15865079A JP15865079A JPS5679958A JP S5679958 A JPS5679958 A JP S5679958A JP 15865079 A JP15865079 A JP 15865079A JP 15865079 A JP15865079 A JP 15865079A JP S5679958 A JPS5679958 A JP S5679958A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- differential circuit
- rotating speed
- electric motor
- speed detector
- 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
Abstract
PURPOSE: To obtain a rotating speed detector of electric motors which is able to change the phase of a gate signal detection point by combining a differential circuit, in which the outputs of the respective phases of a position detector are inputted to the base of transistors, and a current inverting amplifier.
CONSTITUTION: The output of the position detecting part 1 of a rotor is differentially amplified to each phase of 3-phase stator windings 2 by means of a driving part 3, whereby the rotor is driven. The one phase of the 3-phase stator windings 2 is waveform shaped 4 and is connected to a logic gate part 7. Further the position signals of the respective phases of the position detecting part 1 are inputted to a differential circuit 5, and the point advanced by θm from the time t2 (Figure C) is detected by the differential circuit 5 and the current inverting amplifier 6, and if the gate signal (Figure D) of the logic gate part is obtained, the phase controlling eliminating the switching noise at the time t1 such as in Figure B is made possible without requiring the accuracy of assembling a mechanical nonrectifying electric motor.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54158650A JPS608462B2 (en) | 1979-12-05 | 1979-12-05 | Electric motor rotation speed detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54158650A JPS608462B2 (en) | 1979-12-05 | 1979-12-05 | Electric motor rotation speed detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5679958A true JPS5679958A (en) | 1981-06-30 |
JPS608462B2 JPS608462B2 (en) | 1985-03-02 |
Family
ID=15676337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54158650A Expired JPS608462B2 (en) | 1979-12-05 | 1979-12-05 | Electric motor rotation speed detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS608462B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5829384A (en) * | 1981-08-13 | 1983-02-21 | Matsushita Electric Ind Co Ltd | Commutatorless motor |
JPS617293U (en) * | 1984-06-19 | 1986-01-17 | 三洋電機株式会社 | Motor rotation control device |
-
1979
- 1979-12-05 JP JP54158650A patent/JPS608462B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5829384A (en) * | 1981-08-13 | 1983-02-21 | Matsushita Electric Ind Co Ltd | Commutatorless motor |
JPS617293U (en) * | 1984-06-19 | 1986-01-17 | 三洋電機株式会社 | Motor rotation control device |
Also Published As
Publication number | Publication date |
---|---|
JPS608462B2 (en) | 1985-03-02 |
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