Vector Control Inverter Device

2020-12-22

The vector control inverter device includes: a device for detecting the rotation speed of the motor by a rotation speed detector mounted on the motor, a current detector for detecting the primary current of the motor driven by the inverter circuit, and detecting the primary current of the motor by the current detector. The current is divided into the excitation current and the torque current, and the vector controller that independently controls the excitation voltage and the torque voltage for the current divided into the excitation current and the torque current is calculated based on the detected motor speed calculation, and from the PWM circuit for the actual output voltage of the three-phase output voltage has at least one of the following two combinations in the vector control inverter device, that is, the output rotation of the motor is estimated based on the excitation current and the torque current.

A combination of a torque estimating device and a pulse transmitting device that outputs the estimated torque value estimated by the estimating device as a pulse train signal that can recognize positive and negative values, and can receive a pulse train signal input from the outside as a positive or negative value. At least one of a combination of a pulse train input device and a torque command conversion device that converts the received pulse train into a torque command that is a torque that can be output by the motor.