JPS5681092A - Speed control circuit for dc motor - Google Patents
Speed control circuit for dc motorInfo
- Publication number
- JPS5681092A JPS5681092A JP15437679A JP15437679A JPS5681092A JP S5681092 A JPS5681092 A JP S5681092A JP 15437679 A JP15437679 A JP 15437679A JP 15437679 A JP15437679 A JP 15437679A JP S5681092 A JPS5681092 A JP S5681092A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- voltage
- circuit
- current mirror
- mirror circuit
- 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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/288—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using variable impedance
- H02P7/2885—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using variable impedance whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
PURPOSE:To prevent the error due to the temperature change in the speed control circuit for the DC motor whose driving current is controlled by a current mirror circuit, by driving the current mirror circuit with the emitter follower of an NPN transistor. CONSTITUTION:A reference voltage is applied to one input of a voltage comparating circuit 12 constituted by transistors Q4, Q5, Q6, and Q7, and the output voltage of the current mirror circuit 16 is fedback to the other input thereof, thereby the counter-electromotive force of the DC motor 10 gets a constant voltage, and the motor is driven at a constant rotational speed. A transistor Q1 which drives the current mirror circuit 16 is driven by the emitter follower of the NPN transistor Q9 which responds to the output signal of the voltage comparing circuit 12. Since the NPN transistor Q9 has a high current amplification factor, the base current of Q1 becomes small, thereby the error due to the temperature change can be minimized.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15437679A JPS5681092A (en) | 1979-11-30 | 1979-11-30 | Speed control circuit for dc motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15437679A JPS5681092A (en) | 1979-11-30 | 1979-11-30 | Speed control circuit for dc motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5681092A true JPS5681092A (en) | 1981-07-02 |
Family
ID=15582795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15437679A Pending JPS5681092A (en) | 1979-11-30 | 1979-11-30 | Speed control circuit for dc motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5681092A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5981300U (en) * | 1982-11-19 | 1984-06-01 | 松下電器産業株式会社 | DC motor speed control device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5469708A (en) * | 1977-11-14 | 1979-06-05 | Matsushita Electric Ind Co Ltd | Speed controller for dc motor |
-
1979
- 1979-11-30 JP JP15437679A patent/JPS5681092A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5469708A (en) * | 1977-11-14 | 1979-06-05 | Matsushita Electric Ind Co Ltd | Speed controller for dc motor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5981300U (en) * | 1982-11-19 | 1984-06-01 | 松下電器産業株式会社 | DC motor speed control device |
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