A Circuit of Crystal Switched Transistor Bridge Direct Current and Servo Electronic Machines

Published:2011/8/1 2:15:00 Author:Zoey | Keyword: Switched, Crystal, Transistor Bridge, Direct Current , Servo Electronic Machines | From:SeekIC

Transistors of this bridge circuit only works in saturated and ceased state. It has a better regular linearity bridge than usual ones, and it can achieve dynamic brakeif needs to. Servoeffect ofthis circuit is controlled by thevoltage signal margin ofU1 andU2. when 0≤U1-U2≤U1RA/(RA+RB) or0≤U2-U1≤U2RA/(RA+RB), both comparator will input highlevel, D1and D2 will cease to work, D3 and D4 will conduct, making T1 and T2 cease to work,T3 and T4 be saturated, the motor will not be able torotate without voltage. When U1-U2>RAU1/(RA+RB),T3 and T2 will turn to be saturated and will conduct, the voltage will be added on the motor. When U2-U1>RAU2/(RA+RB),T1 and T4 will turn to be saturated and will conduct, the motor will rotate reversely.



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