JPS5775590A - Motor drive circuit - Google Patents
Motor drive circuitInfo
- Publication number
- JPS5775590A JPS5775590A JP55148374A JP14837480A JPS5775590A JP S5775590 A JPS5775590 A JP S5775590A JP 55148374 A JP55148374 A JP 55148374A JP 14837480 A JP14837480 A JP 14837480A JP S5775590 A JPS5775590 A JP S5775590A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- signal
- motor drive
- motor
- drive voltage
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
PURPOSE:To obtain a motor driving circuit of electricity-saving type by controlling a variable voltae source so that the voltage between the collectors and the emitters of motor driving transistor group becomes the minimum value in the active region in response to the motor coil terminal voltage detection signal. CONSTITUTION:When the terminal voltage proportional to the rotating speed of a 3-phase brushless motor 1 is raised due to the rise of the rotatig speed, the voltage signal 32 responsive to the voltage between the collector and the emitters of respective phases is lowered, thereby raising the feedback control signal 33 via an opeational amplifier 31, is compared with the output 35 of a triangular wave genertor 34 in a comparator 33 to increase the ON time of the switching transistor 38, thereby raising the motor drive voltage 43. On the contrary, when the motor drive voltage 43 is excessively raised, the detection voltage signal 32 is increased to lower the signal 33. Thus, the ON time of the switching transistor 38 is shortened to lower the motor drive voltage 43.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55148374A JPS5775590A (en) | 1980-10-24 | 1980-10-24 | Motor drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55148374A JPS5775590A (en) | 1980-10-24 | 1980-10-24 | Motor drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5775590A true JPS5775590A (en) | 1982-05-12 |
Family
ID=15451326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55148374A Pending JPS5775590A (en) | 1980-10-24 | 1980-10-24 | Motor drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5775590A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0097916A2 (en) * | 1982-06-25 | 1984-01-11 | Hitachi, Ltd. | Power supply for plural motors |
| JPS6034793U (en) * | 1983-08-11 | 1985-03-09 | 愛知電機株式会社 | Brushless motor drive device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55120387A (en) * | 1979-03-06 | 1980-09-16 | Matsushita Electric Ind Co Ltd | Motor |
-
1980
- 1980-10-24 JP JP55148374A patent/JPS5775590A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55120387A (en) * | 1979-03-06 | 1980-09-16 | Matsushita Electric Ind Co Ltd | Motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0097916A2 (en) * | 1982-06-25 | 1984-01-11 | Hitachi, Ltd. | Power supply for plural motors |
| JPS6034793U (en) * | 1983-08-11 | 1985-03-09 | 愛知電機株式会社 | Brushless motor drive device |
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