JPS5641781A - Direct current motor operated by selecting automatically its efficiency at near maximum value - Google Patents
Direct current motor operated by selecting automatically its efficiency at near maximum valueInfo
- Publication number
- JPS5641781A JPS5641781A JP11614179A JP11614179A JPS5641781A JP S5641781 A JPS5641781 A JP S5641781A JP 11614179 A JP11614179 A JP 11614179A JP 11614179 A JP11614179 A JP 11614179A JP S5641781 A JPS5641781 A JP S5641781A
- Authority
- JP
- Japan
- Prior art keywords
- value
- shunt field
- circuit
- efficiency
- field currents
- 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
- 230000003321 amplification Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
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
- H02P7/298—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 and field supplies
- H02P7/2985—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 and field supplies 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 operate the DC motor and improve the efficiency of operation selecting the efficiency near the miximum value automatically at all times, by a method wherein the shunt field currents of the DC motor are computed in response to output from a load detector, and the shunt field currents are controlled at the optimum value. CONSTITUTION:An adding and subtracting circuit 14 multiplies the angular velocity omega of the DC shunt motor 2 detected by means of an angular velocity detector 11 by a constant C1, and addes a value obtained by multiplication and a constant (Ra.Rf)<1/2> (Ra: the resistance of an armature, Rf: shunt field resistance). A dividing circuit 15 divides a value of the voltage VA of the armature by an output value of the adding and subtracting circuit 14. A differential amplification circuit 16 sets the upper limit value and lower limit value of a Schmidt-trigger circuit 10 in response to deviation between an output value of the dividing circuit 15 and a value of mean shunt field currents If. The Schmidt-trigger circuit 10 interrupts or conducts a transistor 7 at a point of time when the shunt field currents If reach the same value as the upper limit value or the lower limit value set, and controls the shunt field currents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11614179A JPS5641781A (en) | 1979-09-12 | 1979-09-12 | Direct current motor operated by selecting automatically its efficiency at near maximum value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11614179A JPS5641781A (en) | 1979-09-12 | 1979-09-12 | Direct current motor operated by selecting automatically its efficiency at near maximum value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5641781A true JPS5641781A (en) | 1981-04-18 |
Family
ID=14679750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11614179A Pending JPS5641781A (en) | 1979-09-12 | 1979-09-12 | Direct current motor operated by selecting automatically its efficiency at near maximum value |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5641781A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60127261A (en) * | 1983-12-12 | 1985-07-06 | ハリマセラミック株式会社 | Nozzle for molten steel casting |
| JPS63140689A (en) * | 1986-12-01 | 1988-06-13 | Nippon Yusoki Co Ltd | Motor controller |
| GR1000285B (en) * | 1990-01-03 | 1992-05-12 | Nikolaos Margaris | Method and arrangement for determinating the excitation optimal value |
-
1979
- 1979-09-12 JP JP11614179A patent/JPS5641781A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60127261A (en) * | 1983-12-12 | 1985-07-06 | ハリマセラミック株式会社 | Nozzle for molten steel casting |
| JPH0140790B2 (en) * | 1983-12-12 | 1989-08-31 | Harima Seramitsuku Kk | |
| JPS63140689A (en) * | 1986-12-01 | 1988-06-13 | Nippon Yusoki Co Ltd | Motor controller |
| GR1000285B (en) * | 1990-01-03 | 1992-05-12 | Nikolaos Margaris | Method and arrangement for determinating the excitation optimal value |
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