GB1439453A - Dc electric motors - Google Patents

Dc electric motors

Info

Publication number
GB1439453A
GB1439453A GB389872A GB389872A GB1439453A GB 1439453 A GB1439453 A GB 1439453A GB 389872 A GB389872 A GB 389872A GB 389872 A GB389872 A GB 389872A GB 1439453 A GB1439453 A GB 1439453A
Authority
GB
United Kingdom
Prior art keywords
windings
winding
field
diodes
motor
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
GB389872A
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.)
Sevcon Ltd
Original Assignee
Sevcon 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 Sevcon Ltd filed Critical Sevcon Ltd
Priority to GB389872A priority Critical patent/GB1439453A/en
Publication of GB1439453A publication Critical patent/GB1439453A/en
Expired 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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

1439453 Control of DC motors SEVCON Ltd 27 April 1973 [27 Jan 1972] 3898/72 Heading H2J To prevent unstable operation during plug braking of a D.C. motor 18 having a series field winding 13 and controlled by reversing contacts 14, 15 and a chopper regulator 12, diodes 20, 21 and bucking field windings 16, 17 are connected as shown in Fig. 1, whereby each diode operates as a free wheel diode or a plugging diode according to the direction of rotation of the motor and, during plug braking following reversal of switches 14, 15 and of the functions of the diodes 20, 21, the field winding 16, 17 which is in circuit provides a field opposing that produced by the winding 13 to limit the generated armature voltage and so prevent runaway. In a modification, Fig. 2 (not shown), the bucking windings (16<SP>1</SP>, 17<SP>1</SP>) are connected in series with the winding 13 between the movable contacts of switches 14, 15, with diodes 20, 21 connected to the junctions of the respective pairs of windings. Operation during plug braking is the same as before, but all three field windings are energized during normal motor running.
GB389872A 1972-01-27 1972-01-27 Dc electric motors Expired GB1439453A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB389872A GB1439453A (en) 1972-01-27 1972-01-27 Dc electric motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB389872A GB1439453A (en) 1972-01-27 1972-01-27 Dc electric motors

Publications (1)

Publication Number Publication Date
GB1439453A true GB1439453A (en) 1976-06-16

Family

ID=9766948

Family Applications (1)

Application Number Title Priority Date Filing Date
GB389872A Expired GB1439453A (en) 1972-01-27 1972-01-27 Dc electric motors

Country Status (1)

Country Link
GB (1) GB1439453A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326146B1 (en) * 1988-01-28 1993-05-26 Robert Bosch Gmbh Brake circuit for a universal motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326146B1 (en) * 1988-01-28 1993-05-26 Robert Bosch Gmbh Brake circuit for a universal motor

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee