JPS5662082A - Amplifying circuit for back electromotive voltage of direct current motor - Google Patents
Amplifying circuit for back electromotive voltage of direct current motorInfo
- Publication number
- JPS5662082A JPS5662082A JP13666479A JP13666479A JPS5662082A JP S5662082 A JPS5662082 A JP S5662082A JP 13666479 A JP13666479 A JP 13666479A JP 13666479 A JP13666479 A JP 13666479A JP S5662082 A JPS5662082 A JP S5662082A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- motor
- voltage
- back electromotive
- electromotive 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.)
- Granted
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
- H02P7/29—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 pulse modulation
- H02P7/291—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 pulse modulation with on-off control between two set points, e.g. controlling by hysteresis
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
PURPOSE:To control speed stably both in a low-speed mode and a high-speed mode by a method wherein the detecting value of back electromotive voltage is amplified greatly when low speed and slightly when high speed by using a semiconductor element, and the output is employed as speed detecting signals. CONSTITUTION:In a circuit which rectifies output from an AC power source 1 by means of diodes D1-D4 and applies the output to a DC motor 2 through a transistor Tr1, a potential dividing circuit of resistors R1 and R2 is connected in parallel with the DC motor 2, and the back electromotive voltage of the DC motor 2 is detected during an OFF period of the Tr1 while the detecting value is inputted to a Tr2 as bias voltage. Rectifying voltage in case of the OFF period of the Tr1 is used as a power source, but the back electromotive voltage as input signals is amplified at an amplification degree being inversely proportional to the speed of the motor because the rectifying voltage is in inverse proportion to the speed of the motor. The output voltage V3 is inputted to a controlling circuit C to control the transistor Tr1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54136664A JPS6042707B2 (en) | 1979-10-23 | 1979-10-23 | Back electromotive voltage amplification circuit for DC motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54136664A JPS6042707B2 (en) | 1979-10-23 | 1979-10-23 | Back electromotive voltage amplification circuit for DC motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5662082A true JPS5662082A (en) | 1981-05-27 |
JPS6042707B2 JPS6042707B2 (en) | 1985-09-24 |
Family
ID=15180603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54136664A Expired JPS6042707B2 (en) | 1979-10-23 | 1979-10-23 | Back electromotive voltage amplification circuit for DC motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6042707B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03143008A (en) * | 1989-10-27 | 1991-06-18 | Mitsubishi Electric Corp | Noise filter |
-
1979
- 1979-10-23 JP JP54136664A patent/JPS6042707B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6042707B2 (en) | 1985-09-24 |
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