DC DRIVE SYSTEM
It rectifies the constant voltage and frequency AC power supply to the continuously adjustable DC power supply through controlling SCR element. The rectifying device is a three-phase full controlled rectitying bridge which is isolated apart from AC network through the breaker. The output of the rectifying bridge passes through the assigned contactor and supplies power to DC motor, so as to control drawworks, mud pump, rotary table or speed and torque of top drive system, to make stepless speed regulation and to meet the demand of drive.
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