TOSHIBA 2N3A3120-D PC BOARD ASSEMBLY

(1) Calculation circuit: compare the external speed, torque and other instructions with the current and voltage signals of the detection circuit to determine the output voltage and frequency of the inverter.
(2) Voltage and current detection circuit: isolated from the main circuit potential to detect voltage and current, etc.
(3) Driving circuit: the circuit that drives the main circuit device. It is isolated from the control circuit to make the main circuit device on and off.
(4) Speed detection circuit: the signal of the speed detector (tg, plg, etc.) installed on the shaft of the asynchronous motor is taken as the speed signal, which is sent into the calculation circuit, and the motor can operate at the command speed according to the instruction and calculation.
(5) Protection circuit: detect the voltage and current of the main circuit, when overload or overvoltage and other anomalies occur, in order to prevent the inverter and asynchronous motor damage.