SYSTEM, METHOD, AND APPARATUS FOR CONTROLLING BI-DIRECTIONAL SERVO ACTUATOR BY PWM CONTROL

摘要

PROBLEM TO BE SOLVED: To solve a problem that a servo controller of a turbine may become extremely bulky if the turbine has a large number of valves, and that the energy efficiency decreases and the temperature of the entire control panel rises if the drive energy is converted into heat through a linear drive circuit.

SOLUTION: A method of the present invention may include: a step for receiving a direction control signal; a step for operating a device so as to establish a switchable positive current path and a switchable negative current path that pass through an actuator based at least on the directional signal control signal; a step for transmitting a feedback based at least on a current that is associated with the actuator; and a step for controlling the current based at least on the feedback. The method includes a step for operating one or more devices so as to establish at least one positive current path and at least one negative current path that pass through the actuator by way of a pulse width modulation control.

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