Connected in series with the alleged use of power between the soft starter motor, its internal control thyristor conduction angle, so that the motor input voltage is gradually increased from zero to a preset function until the end of starting, giving full voltage motors, namely soft start, the soft-start process, the motor starting torque is increased, speed is also increased. Soft starters generally have the following types of start-up mode. Kick Start. Boot, that is the shortest time, so the starting current quickly reaches the set value, that is the starting step. By adjusting the starting current setpoint inverter manufacturers can achieve the effect of fast start. Shock pulse start. Starting in the beginning stages, so that the thyristor in a very short period of time, to a greater current conduction after some time down the inverter brand, then set the value of the original linear increase, even the constant start. The start method, in general, less load application, suitable for heavy and large to overcome the static friction of the starting situation. The main circuit is mainly composed of several parts rectifier circuit, filter circuit, inverter circuit and the brake unit and the like Rexroth drive FSCZ01, wherein IGBT (insulated gate bipolar transistors) constituting the inverter main hardware, each part of the circuit functions are summarized as follows: (1) limiting circuit by limiting resistor R and switch K constitution, due to the instantaneous power filter capacitor terminal voltage is zero, the instantaneous power capacitor charging current is large, excessive current may damage the rectifier circuit inverter, for the protection of the rectifier instant electric circuit current limiting resistor in series with the DC link inverter repair network in the drive, when the capacitor is charged to the resistance by the switch K after a short period of time. (2) brake circuit by braking resistor RB and VB switch constitute the main role is the energy consumption of the motor is fed back to avoid excessive pumping voltage inverter damage. Convo Universal G / P series inverter according to different power levels, the choice of different IGBT, power inverter main circuit 18.5kW following models mainly set rectifier, inverter, brake circuit and temperature detection for one of the seven unit modules, 22kW and above models using three-way rectifier module and two units of the inverter module. Servicing the drive Yueyang Ohm Electric (certified), Yichang drive by Ohm Electric Co., Yueyang City. Yueyang City Ohm Electric Co. (www.yyomdq.com/) Hunan Yueyang, inverters, frequency divider leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . In Yueyang Ohm Electric leadership with the staff warmly welcome all inquiries negotiations to create the ohmic electrical Yueyang a better future.