ASYNCHRONOUS MOTOR EXTREME CONTROL DEVICE Russian patent published in 2022 - IPC H02P21/12 

FIELD: electric motors controlling devices.

SUBSTANCE: invention relates to a device for controlling electric motors using vector control. An extreme control device for an induction motor contains a frequency converter, two coordinate converters, a speed generator, the first and second current regulators, the first, second and third comparison elements, a speed controller, a calculator of the d-component of the motor current, a calculator of the q-component of the motor current, a slip calculator, steering angle calculator and speed sensor. At the same time, a stator current calculation unit and an extreme control unit are introduced into the device, designed to obtain extremely low values ​​of the motor stator current by the stepwise search method. The extreme control unit contains a delay line unit, a deadband setter unit, the signal of which determines the deadband δ of the motor current during its regulation, the fourth and fifth comparison elements, a signal relay and a flux linkage control unit. The stator current calculator is designed to calculate the effective value of the motor stator current and contains the first and second multipliers, an adder and a square root calculator.

EFFECT: increasing the energy efficiency of the induction motor by reducing the stator current of the motor to extremely low values.

1 cl, 2 dwg