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Series-Wound Direction And Speed Motor Control circuit

2015-03-02 10:49  
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Series-Wound Direction And Speed Motor Control circuit
This is a motor controller circuit that control the speed and direction of series-wound Motors. This circuit employs silicon controlled rectifiers (SCR) Q1-Q4, that are triggered in diagonal pairs. The switch St is used to control which pair is turned on because either coupling transformer T2 or coupling transformer T1 is connected to a pulsing circuit by this switch. Here is the schematic diagram of the circuit: