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Dynamic Braking Circuit

IP.com Disclosure Number: IPCOM000091350D
Original Publication Date: 1968-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Klimanis, V: AUTHOR

Abstract

A DC motor with a bidirectional driving circuit having transistors T1...T4 can be provided with dynamic braking by connecting diodes D1 and D2 in shunt with two of the transistors T2 and T4. When T1 and T4 are biased conductive, current 11 passes through armature A of the DC motor in one direction. When T2 and T3 are biased conductive, current I2 passes through armature A in the opposite direction. When the motor is being driven by current I1, dynamic braking is accomplished by turning off T1 and T4 while rendering T2 conductive so that the counter is shorted through T2 and D2. When the motor is being driven by 12, dynamic braking is accomplished by turning T2 and T3 off while rendering T4 conductive so as to short out the counter through T4 and D1.

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Dynamic Braking Circuit

A DC motor with a bidirectional driving circuit having transistors T1...T4 can be provided with dynamic braking by connecting diodes D1 and D2 in shunt with two of the transistors T2 and T4. When T1 and T4 are biased conductive, current 11 passes through armature A of the DC motor in one direction. When T2 and T3 are biased conductive, current I2 passes through armature A in the opposite direction. When the motor is being driven by current I1, dynamic braking is accomplished by turning off T1 and T4 while rendering T2 conductive so that the counter is shorted through T2 and D2. When the motor is being driven by 12, dynamic braking is accomplished by turning T2 and T3 off while rendering T4 conductive so as to short out the counter through T4 and D1.

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