JPS5641787A - Accoustic motor - Google Patents

Accoustic motor

Info

Publication number
JPS5641787A
JPS5641787A JP11420279A JP11420279A JPS5641787A JP S5641787 A JPS5641787 A JP S5641787A JP 11420279 A JP11420279 A JP 11420279A JP 11420279 A JP11420279 A JP 11420279A JP S5641787 A JPS5641787 A JP S5641787A
Authority
JP
Japan
Prior art keywords
phase
phases
current
coil
section
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
JP11420279A
Other languages
Japanese (ja)
Inventor
Toshihiko Nakajima
Tadashi Saito
Toshio Osada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11420279A priority Critical patent/JPS5641787A/en
Priority to US06/169,795 priority patent/US4356437A/en
Publication of JPS5641787A publication Critical patent/JPS5641787A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/14—Electronic commutators
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2209/00—Indexing scheme relating to controlling arrangements characterised by the waveform of the supplied voltage or current
    • H02P2209/07—Trapezoidal waveform

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rotational Drive Of Disk (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE:To obtain a highly efficient brushless motor wherein the coil current can be smoothly changed by connecting the coils of two phases among three phases in parallel and connecting the other coil of one phase in series; and by sequentially switching the phases so that the phase that produces the miximum torque is always connected in series. CONSTITUTION:The artificial sine wave output as shown by the broken line is obtained by a rotor position sensor element 1. Said output is sliced so as to have a specified amplitude by an amplitude limiter 8, which is controlled by a DC potential that is obtained by converting the sensed signal of a speed sensor 6 by an F-V converter 7, thereby the trapezoidal wave as shown by a solid line is obtained. The output of the amplitude limiter 8 is applied to one end of a driving coil 3 via a driving transistor 2. In the coil of each phase in the Y connection, the currents of the u and w phases are combined and flow to the v phase in a section A; the current of the u phase flows to the v and w phases in a section B; and the currents u and v phases are combined and flow to the w phase in a section C. The waveform of the current of each phase is similar to the step form which corresponds to the distribution of the magnetic flux density, and the current can be changed smoothly.
JP11420279A 1979-07-20 1979-09-07 Accoustic motor Pending JPS5641787A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP11420279A JPS5641787A (en) 1979-09-07 1979-09-07 Accoustic motor
US06/169,795 US4356437A (en) 1979-07-20 1980-07-17 Control circuit for DC motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11420279A JPS5641787A (en) 1979-09-07 1979-09-07 Accoustic motor

Publications (1)

Publication Number Publication Date
JPS5641787A true JPS5641787A (en) 1981-04-18

Family

ID=14631755

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11420279A Pending JPS5641787A (en) 1979-07-20 1979-09-07 Accoustic motor

Country Status (1)

Country Link
JP (1) JPS5641787A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6271485A (en) * 1985-09-20 1987-04-02 Sony Corp Brushless motor
JPH0391889U (en) * 1989-12-30 1991-09-19

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5429010A (en) * 1977-08-08 1979-03-03 Hitachi Ltd Rotational speed controller for dc motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5429010A (en) * 1977-08-08 1979-03-03 Hitachi Ltd Rotational speed controller for dc motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6271485A (en) * 1985-09-20 1987-04-02 Sony Corp Brushless motor
US4760315A (en) * 1985-09-20 1988-07-26 Sony Corporation Brushless motor drive circuit
JPH0391889U (en) * 1989-12-30 1991-09-19

Similar Documents

Publication Publication Date Title
Gopakumar et al. Split-phase induction motor operation from PWM voltage source inverter
US4546293A (en) Motor control for a brushless DC motor
US5001375A (en) D. C. electric motor
US5012171A (en) Control system for high speed switched reluctance motor
KR880700529A (en) Control method of 3-phase induction motor
JPH04229090A (en) Circuit device for rectifying reaction motor
KR950029169A (en) How to maintain open loop current drive to linear induction motors
JPS5641787A (en) Accoustic motor
Pulle Performance of split-coil switched reluctance drive
Murty Fast response reversible brushless dc drive with regenerative braking
JPH0213556B2 (en)
EP0398222A3 (en) Power generation system
SU1640808A1 (en) Device for sensing angular position of shaft of two-phase synchronous motor with magnetically unbalanced rotor
WO1990016111A1 (en) A device for controlling a reluctance motor
SE9201761D0 (en) PROCEDURE MOVE SPEED CONTROL OF INDUCTION ENGINES
JPS57151292A (en) Controlling system and device for synchronous motor
El Missiry Excitation control of a brushless synchronous motor
SU1695476A1 (en) A c electric drive
TW347609B (en) Method for automatically adjusting parameters of a vector control converter controller
JPH0683585B2 (en) Induction Motor Servo Control System Improves Transient Response by Excitation Angle Control
SU790079A1 (en) Thyratron electric motor
RU2016473C1 (en) Method of control over d c thyratron motor
SU877726A1 (en) Thyratron electric motor
SU1037383A1 (en) Angular displacement pickup
Lajoie-Mazenc Investigation of a convertor-fed reluctance motor