FR2270710A1 - Control cct for micromotor has capacitor turning on braking transistor - across motor when control pulse disappears - Google Patents

Control cct for micromotor has capacitor turning on braking transistor - across motor when control pulse disappears

Info

Publication number
FR2270710A1
FR2270710A1 FR7513970A FR7513970A FR2270710A1 FR 2270710 A1 FR2270710 A1 FR 2270710A1 FR 7513970 A FR7513970 A FR 7513970A FR 7513970 A FR7513970 A FR 7513970A FR 2270710 A1 FR2270710 A1 FR 2270710A1
Authority
FR
France
Prior art keywords
control
transistor
motor
micromotor
capacitor
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
FR7513970A
Other languages
French (fr)
Other versions
FR2270710B3 (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.)
Portescap SA
Original Assignee
Portescap SA
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 Portescap SA filed Critical Portescap SA
Publication of FR2270710A1 publication Critical patent/FR2270710A1/en
Application granted granted Critical
Publication of FR2270710B3 publication Critical patent/FR2270710B3/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
    • H02P8/00—Arrangements for controlling dynamo-electric motors rotating step by step
    • H02P8/02—Arrangements for controlling dynamo-electric motors rotating step by step specially adapted for single-phase or bi-pole stepper motors, e.g. watch-motors, clock-motors

Landscapes

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

Abstract

The control circuit, for a micromotor, has the braking transistor (T2) controlled by the discharge of a capacitor (C) charged from the d.c. supply. The braking transistor is coupled across the motor and is in series with the motor's speed control transistor (T1). A control pulse (1) turns on a third transistor (T3) which simultaneously turns on the control transistor and charges the capacitor. When the pulse disappears the control transistor turns off and the capacitor discharges through a fourth transistor (turned on when the pulse disappears) and turns on the braking transistor.
FR7513970A 1974-05-07 1975-05-05 Control cct for micromotor has capacitor turning on braking transistor - across motor when control pulse disappears Granted FR2270710A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH617274A CH580299B5 (en) 1974-05-07 1974-05-07

Publications (2)

Publication Number Publication Date
FR2270710A1 true FR2270710A1 (en) 1975-12-05
FR2270710B3 FR2270710B3 (en) 1978-11-17

Family

ID=4305402

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7513970A Granted FR2270710A1 (en) 1974-05-07 1975-05-05 Control cct for micromotor has capacitor turning on braking transistor - across motor when control pulse disappears

Country Status (3)

Country Link
CH (2) CH617274A4 (en)
DE (1) DE2519509A1 (en)
FR (1) FR2270710A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7075257B2 (en) 2002-10-18 2006-07-11 Black & Decker Inc. Method and device for braking a motor
US7023159B2 (en) 2002-10-18 2006-04-04 Black & Decker Inc. Method and device for braking a motor
TWI730281B (en) 2018-01-03 2021-06-11 美商米沃奇電子工具公司 Electronic braking in a power tool

Also Published As

Publication number Publication date
FR2270710B3 (en) 1978-11-17
CH617274A4 (en) 1976-04-30
DE2519509A1 (en) 1975-11-20
CH580299B5 (en) 1976-09-30

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Legal Events

Date Code Title Description
ST Notification of lapse