FR2248634A1 - Electronic overload protection for transistorised motor controller - is dependent on applied voltage and motor back E.M.F. - Google Patents

Electronic overload protection for transistorised motor controller - is dependent on applied voltage and motor back E.M.F.

Info

Publication number
FR2248634A1
FR2248634A1 FR7435198A FR7435198A FR2248634A1 FR 2248634 A1 FR2248634 A1 FR 2248634A1 FR 7435198 A FR7435198 A FR 7435198A FR 7435198 A FR7435198 A FR 7435198A FR 2248634 A1 FR2248634 A1 FR 2248634A1
Authority
FR
France
Prior art keywords
motor
transistor
applied voltage
transistorised
dependent
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
FR7435198A
Other languages
French (fr)
Other versions
FR2248634B1 (en
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of FR2248634A1 publication Critical patent/FR2248634A1/en
Application granted granted Critical
Publication of FR2248634B1 publication Critical patent/FR2248634B1/fr
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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Direct Current Motors (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

The circuit operates in conjunction with a transistor circuit supplying preset but variable current to the motor in order to maintain a constant torque. At low speeds, or if the motor stall, the back e.m.f. developed by the motor is small and thus the transistor in the controller has to absorb the large voltage difference between motor and supply. The protection circuit operating level is dependant upon the applied voltage and back e.m.f. in such a manner that for increasing transistor voltage is reponds at a lower current to limit the power loss in the control transistor. Typically the protection shunts some of the motor current.
FR7435198A 1973-10-20 1974-10-18 Electronic overload protection for transistorised motor controller - is dependent on applied voltage and motor back E.M.F. Granted FR2248634A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732352695 DE2352695A1 (en) 1973-10-20 1973-10-20 SWITCH ARRANGEMENT FOR AN ELECTRIC MOTOR

Publications (2)

Publication Number Publication Date
FR2248634A1 true FR2248634A1 (en) 1975-05-16
FR2248634B1 FR2248634B1 (en) 1977-10-28

Family

ID=5895977

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7435198A Granted FR2248634A1 (en) 1973-10-20 1974-10-18 Electronic overload protection for transistorised motor controller - is dependent on applied voltage and motor back E.M.F.

Country Status (4)

Country Link
JP (1) JPS5067922A (en)
DE (1) DE2352695A1 (en)
FR (1) FR2248634A1 (en)
IT (1) IT1022908B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515890A1 (en) * 1981-11-03 1983-05-06 Marchal Equip Auto PROTECTION DEVICE FOR THE CONTROL TRANSISTOR OF AN ELECTRIC MOTOR, ASSEMBLY CONSISTING OF SUCH A DEVICE AND ITS ASSOCIATED MOTOR AND USE IN A MOTOR VEHICLE

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI89316C (en) * 1988-06-23 1993-09-10 Kone Oy ANORDNING FOER STYRNING AV TERMINALSTYRDON

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515890A1 (en) * 1981-11-03 1983-05-06 Marchal Equip Auto PROTECTION DEVICE FOR THE CONTROL TRANSISTOR OF AN ELECTRIC MOTOR, ASSEMBLY CONSISTING OF SUCH A DEVICE AND ITS ASSOCIATED MOTOR AND USE IN A MOTOR VEHICLE

Also Published As

Publication number Publication date
DE2352695A1 (en) 1975-04-30
JPS5067922A (en) 1975-06-06
IT1022908B (en) 1978-04-20
FR2248634B1 (en) 1977-10-28

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Legal Events

Date Code Title Description
ST Notification of lapse