Variable Frequency Drive, AC 220V Motor Speed Controller Variable Frequency Converter Single-phase VFD Speed Controller, for 3-Phase AC Motor, with Over Heat & Overload Protection. SAFETY? : A professionally manufactured inverter with a wide range of protection methods: over-current, over-voltage and under-voltage, module failure, overheating, short-circuit, input and output phase loss, abnormal motor parameter adjustment, electronic thermal relay, etc. PRECISION? : With a unique control design, this single-phase inverter has good anti-trip performance and the ability to adapt to strong electrical interference, temperature, humidity and dust interference, greatly improving stability, fast start-stop response, and high torque at low speeds. USE? : Simple operation and wiring, connected to the wire through screw terminals, more convenient and time-saving, inverter motor drive, sufficient power to meet the needs of more equipment control, designed with a large heat sink, which can better dissipate heat and ensure long-term reliable operation. FLEXIBLE? : Light weight, small size, single-phase into the three-phase out of the motor speed controller is easy to move and adjust the equipment, through the optimization of the PWM control technology and electromagnetic compatibility, to achieve high torque, high precision, wide range of speed regulation drive. HIGH QUALITY? : Manufactured with standard workmanship and robustness, this inverter meets the user’s requirements for low noise and low electromagnetic interference. Rated voltage: single-phase/three-phase AC220V, applicable motor power:, rated current: 12A, maximum output frequency: 400Hz. Frequency &Voltage Regulator The VFD can provide the required power supply and voltage of the motor Voltage regulator is used to adjust the voltage in power system.