Power conversion device for precise control of motor rotation speed and output in control systems for industrial robots and FA equipment. Used for speed control of three-phase AC motors, servo motors, and stepping motors, essential for robot arm motion control, conveyor belt speed adjustment, and positioning control of automatic assembly equipment. Equipped with PWM control, vector control, V/f control methods to achieve high-precision speed control and energy-saving operation. Mainstream products feature PLC communication functions, encoder feedback support, and overload protection, clearly distinguished from standalone motor control devices and PLC units.