The is a single-phase 220 V voltage input frequency converter to drives a three-phase motor (be sure to convert the connection method into a t-riangle type). Four-digit digital tube display, you can see the data clearly. Support display radiator temperature value, current current value, direct current master voltage value, motor speed, operating frequency value. Output 1.0-99.0Hz, in order to improve the output voltage, this product uses SVPWM modulation mode, carrier-frequency 8.0KHz. The frequency converter can arbitrarily change the V/F curve by setting the V/F compensation frequency and the voltage ratio at the frequency. By setting the maximum value of V/F curve, according to the load situation, to maximize the use efficiency of electric energy, reduce the heat of the motor, prolong the servicelife of the motor and frequency converter. Low frequency high torque, 220 V single-phase input, 220 V three-phase output, energy saving and electricity saving. Overheating and over-voltage protections. Specifications: Name: Frequency Converter Power: AC220V +/- 20% Input speed: 3000rpm Output speed: 0-3000rpm Speed adjustable-range: 0-1800rpm Rated power: 0.75KW Temperature: -10℃ to 55℃ Humidity: 0-65% Item size: 143 x 100 x 61mm / 5.63 x 3.94 x 2.40in Item weight: 362g / 12.77ounce / 0.80lb/Pcs Colour: black Material: ABS + electronic components Package Contents: 3 x Frequency Converter 3 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.