JPS5619395A - Dc motor control circuit - Google Patents
Dc motor control circuitInfo
- Publication number
- JPS5619395A JPS5619395A JP9157479A JP9157479A JPS5619395A JP S5619395 A JPS5619395 A JP S5619395A JP 9157479 A JP9157479 A JP 9157479A JP 9157479 A JP9157479 A JP 9157479A JP S5619395 A JPS5619395 A JP S5619395A
- Authority
- JP
- Japan
- Prior art keywords
- voltages
- reference voltages
- control circuit
- motor control
- neutral potential
- 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
Classifications
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
PURPOSE:To remove the affect of an offset of the output voltage and the irregularity of the sensitivity of a magnetic field detector in a DC motor control circuit by limiting the amplifed output voltages of the magnetic field detector within the upper and lower reference voltages wherein two reference voltages vary interlockingly with the neutral potential as a center. CONSTITUTION:The output voltage of the Hall element 30 is amplified by the differential amplifier 48 around the neutral potential VE of the reference voltages VC and VD as a center, is limited at the upper and the lower amplitudes by the diodes 51, 54 to the voltages VC and VD, and applied through power transistors 57, 58 to a stator coil 63. The voltages VC and VD are determined by the base potential vs of a transistor 21. The amplitude of the drive voltage may be altered from the value near the power supply voltage VCC to zero. Further since the neutral potential VE does not alter, the electric powers consumed in the power transistors 57, 59, 61 and 58, 60, 62 are equal.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9157479A JPS5619395A (en) | 1979-07-20 | 1979-07-20 | Dc motor control circuit |
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 |
---|---|---|---|
JP9157479A JPS5619395A (en) | 1979-07-20 | 1979-07-20 | Dc motor control circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5619395A true JPS5619395A (en) | 1981-02-24 |
JPS6159075B2 JPS6159075B2 (en) | 1986-12-15 |
Family
ID=14030295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9157479A Granted JPS5619395A (en) | 1979-07-20 | 1979-07-20 | Dc motor control circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5619395A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4484115A (en) * | 1981-07-14 | 1984-11-20 | Fuji Photo Film Co., Ltd. | Brushless motor |
US4507591A (en) * | 1983-07-26 | 1985-03-26 | Rca Corporation | Linear pulse width to current converter for brushless DC motors |
US4760315A (en) * | 1985-09-20 | 1988-07-26 | Sony Corporation | Brushless motor drive circuit |
-
1979
- 1979-07-20 JP JP9157479A patent/JPS5619395A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4484115A (en) * | 1981-07-14 | 1984-11-20 | Fuji Photo Film Co., Ltd. | Brushless motor |
US4507591A (en) * | 1983-07-26 | 1985-03-26 | Rca Corporation | Linear pulse width to current converter for brushless DC motors |
US4760315A (en) * | 1985-09-20 | 1988-07-26 | Sony Corporation | Brushless motor drive circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS6159075B2 (en) | 1986-12-15 |
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