GB1363738A - Electric circuit arrangement for controlling the supply of electric current to an electric motor - Google Patents

Electric circuit arrangement for controlling the supply of electric current to an electric motor

Info

Publication number
GB1363738A
GB1363738A GB4950871A GB4950871A GB1363738A GB 1363738 A GB1363738 A GB 1363738A GB 4950871 A GB4950871 A GB 4950871A GB 4950871 A GB4950871 A GB 4950871A GB 1363738 A GB1363738 A GB 1363738A
Authority
GB
United Kingdom
Prior art keywords
motor
transistor
electric
relay
speed
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.)
Expired
Application number
GB4950871A
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.)
MESSGERAETEWERK ZWOENITZ GERAE
Original Assignee
MESSGERAETEWERK ZWOENITZ GERAE
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 MESSGERAETEWERK ZWOENITZ GERAE filed Critical MESSGERAETEWERK ZWOENITZ GERAE
Priority to GB4950871A priority Critical patent/GB1363738A/en
Publication of GB1363738A publication Critical patent/GB1363738A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02H7/093—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 against increase beyond, or decrease below, a predetermined level of rotational speed
    • 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
    • H02H7/085—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 against excessive load

Landscapes

  • Protection Of Generators And Motors (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

1363738 Protective arrangements; control of A.C. motors KOMBINAT VEB MESSGERATEWERK ZWONITZ GERATEWERK KARLMARX-STADT 25 Oct 1971 49508/71 Headings' H2J and H2K A protective arrangement for a motor M, e.g. of a teleprinter, comprises first means W1 responsive to the temperature of the motor, second means G, L responsive to the speed of the motor, and third means operative on response of the first and/or second means to break the supply circuit to the motor in the event of high temperature or low speed. As shown, the first means W1 is a positive temperature coefficient resistor inside the motor and connected in series with a transistor T1 across a capacitor C2. A device G driven by the motor induces pulses in a coil L connected to the base of the transistor T1. When the temperature is high or the speed is low, the average conduction of the transistor is low, so that the capacitor C2 charges until a Zener diode D2 breaks down causing a transistor T2 to conduct and energize a relay X. The relay X opens its contacts x to cause a switching apparatus F to effect disconnection from a telegraph line a, b and the operation of a relay Y which opens its contacts y1 to disconnect the motor M.
GB4950871A 1971-10-25 1971-10-25 Electric circuit arrangement for controlling the supply of electric current to an electric motor Expired GB1363738A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4950871A GB1363738A (en) 1971-10-25 1971-10-25 Electric circuit arrangement for controlling the supply of electric current to an electric motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4950871A GB1363738A (en) 1971-10-25 1971-10-25 Electric circuit arrangement for controlling the supply of electric current to an electric motor

Publications (1)

Publication Number Publication Date
GB1363738A true GB1363738A (en) 1974-08-14

Family

ID=10452590

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4950871A Expired GB1363738A (en) 1971-10-25 1971-10-25 Electric circuit arrangement for controlling the supply of electric current to an electric motor

Country Status (1)

Country Link
GB (1) GB1363738A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8801190A (en) * 1988-05-06 1989-12-01 Indolec B V FAN.
GB2237156A (en) * 1989-10-17 1991-04-24 Samsung Electronics Co Ltd Control apparatus for food processing apparatus
GB2242582A (en) * 1990-02-19 1991-10-02 C E Set Srl Drive protection system
EP0456874A1 (en) * 1990-05-18 1991-11-21 Siemens Aktiengesellschaft Overload protection for the winding of a DC-series-motor, monitored by a rotational speed measuring device
GB2268644A (en) * 1989-04-28 1994-01-12 Riken Kk Electric motor control circuit.
GB2232255B (en) * 1989-04-28 1994-02-02 Riken Kk Automatic window/door system
WO1994007289A1 (en) * 1992-09-16 1994-03-31 Leica Mikroskopie Und Systeme Gmbh Process and device for electronically monitoring the overload on electric motor drives
DE10146091A1 (en) * 2001-09-19 2003-09-11 Pierburg Gmbh Process and device to prevent electric motor overload especially in motor vehicle water pumps has both temperature and rotation speed sensors

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8801190A (en) * 1988-05-06 1989-12-01 Indolec B V FAN.
GB2232255B (en) * 1989-04-28 1994-02-02 Riken Kk Automatic window/door system
GB2268644B (en) * 1989-04-28 1994-04-20 Riken Kk Electric motor control circuit
GB2268644A (en) * 1989-04-28 1994-01-12 Riken Kk Electric motor control circuit.
GB2237156A (en) * 1989-10-17 1991-04-24 Samsung Electronics Co Ltd Control apparatus for food processing apparatus
GB2237156B (en) * 1989-10-17 1993-09-08 Samsung Electronics Co Ltd Improvements relating to food processing apparatus
GB2242582B (en) * 1990-02-19 1994-05-04 C E Set Srl Drive systems for rotatable appliances
GB2242582A (en) * 1990-02-19 1991-10-02 C E Set Srl Drive protection system
EP0456874A1 (en) * 1990-05-18 1991-11-21 Siemens Aktiengesellschaft Overload protection for the winding of a DC-series-motor, monitored by a rotational speed measuring device
WO1994007289A1 (en) * 1992-09-16 1994-03-31 Leica Mikroskopie Und Systeme Gmbh Process and device for electronically monitoring the overload on electric motor drives
US5602708A (en) * 1992-09-16 1997-02-11 Leica Mikroskopie Und Systeme Gmbh Process and device for electronically monitoring the overload on electric motor drives
DE10146091A1 (en) * 2001-09-19 2003-09-11 Pierburg Gmbh Process and device to prevent electric motor overload especially in motor vehicle water pumps has both temperature and rotation speed sensors
DE10146091B4 (en) * 2001-09-19 2009-12-31 Pierburg Gmbh Overload protection for electric motors and method for overload protection of electric motors

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees