JPS5679958A - Rotating speed detector of electric motor - Google Patents

Rotating speed detector of electric motor

Info

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
Application number
JP15865079A
Other languages
Japanese (ja)
Other versions
JPS608462B2 (en
Inventor
Takuji Kadota
Hiroshi Okamoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP54158650A priority Critical patent/JPS608462B2/en
Publication of JPS5679958A publication Critical patent/JPS5679958A/en
Publication of JPS608462B2 publication Critical patent/JPS608462B2/en
Expired legal-status Critical Current

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
JP54158650A 1979-12-05 1979-12-05 Electric motor rotation speed detection device Expired JPS608462B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
GB1419544A (en) Dc electric motors
US4008425A (en) Motor servo system with multiplier means to drive and servo the motor
SE8307088D0 (en) dc motor
GB1519658A (en) Position control arrangements
GB1485524A (en) Electric motors
GB1371985A (en) Electronic control device in particular for use in a variable- reluctance motor
EP0217599A3 (en) Brushless motor drive circuits
KR860007773A (en) Motor drive
JPS57160385A (en) Rotor position detecting method for brushless direct current motor
JPS5679958A (en) Rotating speed detector of electric motor
US3743902A (en) Brushless dc motor
GB1424208A (en) Commutatorless electric motor electronic commutation system
US3896349A (en) Electric drive for motors interconnected to form a ring circuit
JPS5229917A (en) Detection circuit for position of rotor in commutatorless motor
JPS57180382A (en) Speed controller for 3-phase brushless motor
DE59611100D1 (en) Electronically commutated motor
JPS5830670A (en) Voltage forming device proportional to number of revolution and direction of rotation of direct current driving device
JPS54158629A (en) Controlling device of thyristor motor
JPS5785590A (en) Rotor position detecting system for rotary electric machine
JPS57142563A (en) Rotating speed detection circuit for brushless motor
JPS5574394A (en) Drive unit for motor without commutator
JPH0342325Y2 (en)
KR0162044B1 (en) Circuit for detecting speed in a 3-phase synchronous motor
JPS55139086A (en) Device for controlling commutatorless motor
SU484461A1 (en) Contactless DC Tachogenerator