Prices vector converter | works basically the structure and principles of the internal circuitry of the drive current of the inverter is generally a three-phase rectifier circuit of the inverter by the three-phase full-wave rectifier bridge components. Its main role is frequency of the external power supply is rectified, and provide the required DC power to the inverter circuit and control circuits. Its control rectifier circuit, the DC voltage source may be, may be a DC current source. The role of DC intermediate circuit is output rectifier smoothing circuit to ensure that the inverter circuit and control power to get higher quality DC power supply. In addition, due to the need of the motor braking, the DC intermediate circuit and sometimes the braking resistor and other auxiliary circuits. Inverter circuit is one of the most important part of the drive. Its main role is under the control of the control circuit, the smoothing circuit output is converted to DC power frequency and voltage are adjustable AC power. The output of the inverter circuit is the inverter output, which is used to achieve the asynchronous motor speed control. Inverter control circuit includes a main control circuit, a signal detection circuit, the gate drive circuit sections, the external interface circuit and protection circuit, is the core of the inverter. The control circuit determines the merits of the drive perform. The main role of the control circuit is to get the various signal detection circuit is supplied to the arithmetic circuit, according to the requirements of the operational circuit is capable of providing the necessary main circuit of the inverter gate drive signal, to provide the necessary protection for the inverter and asynchronous motors. Furthermore, the control circuit through A / O, O / A and other external interface circuit to receive and transmit various forms of external signals and given the state of the inner workings of the system, the drive can perform a variety of external devices with high-performance control.