JPS57129193A - Current detector for dc electric machine - Google Patents

Current detector for dc electric machine

Info

Publication number
JPS57129193A
JPS57129193A JP56011676A JP1167681A JPS57129193A JP S57129193 A JPS57129193 A JP S57129193A JP 56011676 A JP56011676 A JP 56011676A JP 1167681 A JP1167681 A JP 1167681A JP S57129193 A JPS57129193 A JP S57129193A
Authority
JP
Japan
Prior art keywords
signal
voltage
rectifier
voltage signal
electric machine
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
Application number
JP56011676A
Other languages
Japanese (ja)
Inventor
Yasumasa Tofuji
Sumio Kobayashi
Juichi Ninomiya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56011676A priority Critical patent/JPS57129193A/en
Publication of JPS57129193A publication Critical patent/JPS57129193A/en
Pending legal-status Critical Current

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
    • H02P7/292—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 static converters, e.g. AC to DC
    • H02P7/293—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 static converters, e.g. AC to DC using phase control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

PURPOSE:To simplify the structure of an armature current detector by supplying variable DC power controlled in phase for AC power to a DC electric machine through a rectifier. CONSTITUTION:A rectifier D is connected between voltage phase control means 3 and a DC motor 2. Induction electromotive force detecting means 11 receives a voltage signal a generated at the cathode side of a rectifier D and a voltage signal b generated at the anode side, and outputs as the induction electromotive force signal d of a DC motor 2 the voltage signal a under the condition that there is a potential difference between the voltage signals a and b and the voltage signal b is zero. Arithmetic means 15 outputs a signal proportional to the armature current by reducing the signal a and the signal d therefrom. The output of the means 15 is applied to the phase control circuit 10 of the means 3 through a current control amplifier 16. In this manner, the armature current can be detected without providing a shunt or a DC current transformer in a main circuit.
JP56011676A 1981-01-30 1981-01-30 Current detector for dc electric machine Pending JPS57129193A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56011676A JPS57129193A (en) 1981-01-30 1981-01-30 Current detector for dc electric machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56011676A JPS57129193A (en) 1981-01-30 1981-01-30 Current detector for dc electric machine

Publications (1)

Publication Number Publication Date
JPS57129193A true JPS57129193A (en) 1982-08-11

Family

ID=11784591

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56011676A Pending JPS57129193A (en) 1981-01-30 1981-01-30 Current detector for dc electric machine

Country Status (1)

Country Link
JP (1) JPS57129193A (en)

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