JPS5641787A - Accoustic motor - Google Patents
Accoustic motorInfo
- 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
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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5429010A (en) * | 1977-08-08 | 1979-03-03 | Hitachi Ltd | Rotational speed controller for dc motor |
-
1979
- 1979-09-07 JP JP11420279A patent/JPS5641787A/en active Pending
Patent Citations (1)
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)
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 |
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