JPS57138888A - Current limiting circuit for dc motor - Google Patents

Current limiting circuit for dc motor

Info

Publication number
JPS57138888A
JPS57138888A JP56024092A JP2409281A JPS57138888A JP S57138888 A JPS57138888 A JP S57138888A JP 56024092 A JP56024092 A JP 56024092A JP 2409281 A JP2409281 A JP 2409281A JP S57138888 A JPS57138888 A JP S57138888A
Authority
JP
Japan
Prior art keywords
voltage
motor
bridge circuit
terminal
output
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
Application number
JP56024092A
Other languages
Japanese (ja)
Other versions
JPS627792B2 (en
Inventor
Hiromitsu Nakano
Isao Yoshida
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56024092A priority Critical patent/JPS57138888A/en
Publication of JPS57138888A publication Critical patent/JPS57138888A/en
Publication of JPS627792B2 publication Critical patent/JPS627792B2/ja
Granted 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
    • H02P7/288—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

Abstract

PURPOSE:To limit the flow of an excessive current by providing a voltage detector which detects as detected voltage the summed voltage of a terminal voltage of a resistor in series with a DC motor from the output terminal of a bridge circuit and a reference voltage. CONSTITUTION:Transistors 6, 8 are controlled in response to the differential voltage between the output voltage of a bridge circuit formed of resistors 2-4 and a DC motor 1 and a reference voltage Vref. A voltage detector 14 branches the base current of the transistor 6 when a transistor 17 is conducted ON if the summed voltage of a voltage divided from the output voltage of a constant-voltage circuit 10 for obtaining a reference voltage Vref and a voltage at the point of the detecting terminal a of the bridge circuit is raised. In this manner, it can limit the excessive current flowing through the speed controller.
JP56024092A 1981-02-19 1981-02-19 Current limiting circuit for dc motor Granted JPS57138888A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56024092A JPS57138888A (en) 1981-02-19 1981-02-19 Current limiting circuit for dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56024092A JPS57138888A (en) 1981-02-19 1981-02-19 Current limiting circuit for dc motor

Publications (2)

Publication Number Publication Date
JPS57138888A true JPS57138888A (en) 1982-08-27
JPS627792B2 JPS627792B2 (en) 1987-02-19

Family

ID=12128730

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56024092A Granted JPS57138888A (en) 1981-02-19 1981-02-19 Current limiting circuit for dc motor

Country Status (1)

Country Link
JP (1) JPS57138888A (en)

Also Published As

Publication number Publication date
JPS627792B2 (en) 1987-02-19

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