JPS5612892A - Dc motor operated nearly at maximum efficiency automatically selected - Google Patents
Dc motor operated nearly at maximum efficiency automatically selectedInfo
- Publication number
- JPS5612892A JPS5612892A JP8743679A JP8743679A JPS5612892A JP S5612892 A JPS5612892 A JP S5612892A JP 8743679 A JP8743679 A JP 8743679A JP 8743679 A JP8743679 A JP 8743679A JP S5612892 A JPS5612892 A JP S5612892A
- Authority
- JP
- Japan
- Prior art keywords
- maximum efficiency
- shunt field
- field current
- automatically selected
- current value
- 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
- H02P7/282—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 field supply only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
PURPOSE:To operate the DC motor by always automatically selecting the vicinity of the maximum efficiency by detecting the load variation to so control as to become shunt field current value corresponding to be maximum efficiency. CONSTITUTION:The upper and lower limit values of the pulsating current value of a shunt field current IF are set by using the hysteresis characteristics of a Schmitt trigger circuit 10 for controlling the on or off between the emitter and the collector of a transistor Tr 7 by controlling the base of the transistor Tr 7, and the upper and the lower limit values of the set pulsating current value are compared with the shunt field current IF detected through a resistor 8 to set the Tr 7 off or on when the current IF as the pulsating current. If the threshold of the circuit 10 is altered, the mean shunt field current If can be varied. In this manner it can automatically select the vicinity of the maximum efficiency to operate the DC motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8743679A JPS5612892A (en) | 1979-07-12 | 1979-07-12 | Dc motor operated nearly at maximum efficiency automatically selected |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8743679A JPS5612892A (en) | 1979-07-12 | 1979-07-12 | Dc motor operated nearly at maximum efficiency automatically selected |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5612892A true JPS5612892A (en) | 1981-02-07 |
Family
ID=13914809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8743679A Pending JPS5612892A (en) | 1979-07-12 | 1979-07-12 | Dc motor operated nearly at maximum efficiency automatically selected |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5612892A (en) |
-
1979
- 1979-07-12 JP JP8743679A patent/JPS5612892A/en active Pending
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