Electronic commutation series excited direct-current motor four-quadrant operation control device and method

Abstract

The invention provides an electronic commutation series excited direct-current motor four-quadrant operation control device and method capable of achieving the control objectives such as electronic commutation, speed regulation and feedback power generation of an electronic commutation series excited direct-current motor. The device comprises a rectifier and inverter three-phase bridge circuit formed by semiconductor switching elements, a diode, a local control unit, a driving circuit and a position sensor. The local control unit determines the position of a motor rotor through the position sensor and selectively controls two of six switching tubes in a rectifier and inverter bridge to serve as a power supply switch pair to supply power to two phases in a motor three-phase winding, and driving and voltage and speed regulation of the electronic commutation series excited direct-current motor can be achieved by changing the duty ratio of the power supply switch pair. According to the device and method, the structure is reasonable and simple, the method is advanced, the control functions such as quick commutation and feedback power generation can be achieved, the size is small, cost is low, and a positive effect is achieved for application and popularization of the series excited motor.

Description

technical field [0001] The invention discloses a four-quadrant operation control device for an electronically commutated series-excited direct-current motor and a method thereof, belonging to the field of direct-current brushed motor control, in particular to the field of series-excited direct-current motor control. Background technique [0002] Series excited DC motors are widely used in industrial and agricultural production because of their advantages such as large starting torque and strong overload capacity. The internal commutator of the traditional structure series motor is prone to commutation failure and ring fire when the current is too large; the permanent magnet provides the excitation magnetic field for the brushless DC motor, and it is prone to loss of magnetism after experiencing overload, overtemperature and vibration phenomenon, and these phenomena will reduce the performance of the motor. Contents of the invention [0003] The purpose of the present inve...

AI Technical Summary

Problems solved by technology

The internal commutator of the traditional structure series motor is prone to commutation failure and ring fire when the current is too large; the permanent magnet provides the excitation magnetic field for the brushless DC motor, and it is prone to loss of magnetism after experiencing overload, overtemperature and vibration phenomenon, and these phenomena will reduce the performance of the motor

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