JPS54121187A - Detector for rotating directions and rotating speeds of ac machines - Google Patents

Detector for rotating directions and rotating speeds of ac machines

Info

Publication number
JPS54121187A
JPS54121187A JP2825678A JP2825678A JPS54121187A JP S54121187 A JPS54121187 A JP S54121187A JP 2825678 A JP2825678 A JP 2825678A JP 2825678 A JP2825678 A JP 2825678A JP S54121187 A JPS54121187 A JP S54121187A
Authority
JP
Japan
Prior art keywords
electromotive force
magnetic flux
phase
rotating
operated
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
JP2825678A
Other languages
Japanese (ja)
Other versions
JPS5856435B2 (en
Inventor
Toshihiro Nomura
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP53028256A priority Critical patent/JPS5856435B2/en
Publication of JPS54121187A publication Critical patent/JPS54121187A/en
Publication of JPS5856435B2 publication Critical patent/JPS5856435B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE: To enable the rotating directions and speeds of AC machines to be detected with always stable accuracy by rectifying the electromotive force in synchronization to the rotating vector obtained through operation of the electromotive force.
CONSTITUTION: Electromotive force is operated from the terminal voltage and current of an AC machine 10. From this electromotive force, magnetic flux is operated with a magnetic flux operator 18. The phase of the magnetic flux having been operated is advanced by 90° with a vector rotator 20 so that the magnetic flux having been phase shifted becomes in-phase when it is forward rotation with respect to the electromitive force vector and anti-phase when it is backward rotation. Further an electromotive force rectifier (R1 thru R3, switching elements 22 thru 26, R4, operational amplifier 28) is provided and the electromotive force is synchronously rectified in synchronization to either one of positive or negative half wave of the magnetic flux having been phase-shifted by the rotator 20. From the polarity and magnitude of the rectified output voltage EUVW, the rotating directions and speeds of the AC machine are detected.
COPYRIGHT: (C)1979,JPO&Japio
JP53028256A 1978-03-14 1978-03-14 AC machine rotation direction and rotation speed detection device Expired JPS5856435B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53028256A JPS5856435B2 (en) 1978-03-14 1978-03-14 AC machine rotation direction and rotation speed detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53028256A JPS5856435B2 (en) 1978-03-14 1978-03-14 AC machine rotation direction and rotation speed detection device

Publications (2)

Publication Number Publication Date
JPS54121187A true JPS54121187A (en) 1979-09-20
JPS5856435B2 JPS5856435B2 (en) 1983-12-14

Family

ID=12243478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53028256A Expired JPS5856435B2 (en) 1978-03-14 1978-03-14 AC machine rotation direction and rotation speed detection device

Country Status (1)

Country Link
JP (1) JPS5856435B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5811865A (en) * 1981-07-15 1983-01-22 Aida Eng Ltd Detector for rotation stopping of induction motor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02250326A (en) * 1989-03-23 1990-10-08 Toshiba Ceramics Co Ltd Semiconductor manufacturing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5811865A (en) * 1981-07-15 1983-01-22 Aida Eng Ltd Detector for rotation stopping of induction motor

Also Published As

Publication number Publication date
JPS5856435B2 (en) 1983-12-14

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