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Motor Operation Control Circuit of LT1014

2016-09-02 15:47  
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Motor Operation  Control Circuit of LT1014
The aboved picture is motor operation control circuit compsoed of LT0140 etc.Motor speed voltage is set by middle tap of potentiometer RP1.In order to make the motor speed stable, RP3 adjusts the positive feedback voltgae from current detection resistance R1 is inversely proportional to the current and A1 adds the feedback voltage and speed setting voltage together.The best RP3 adjustment can completely offset the motor parasitic resistance, so that motor torque-speed characteristics are hard.Motor speed control performance does not depend on mechanical loading, but driving circuit voltage.