A new double-stator low-pulsation torque stepping motor

Abstract

A new double-stator low-pulsation torque stepping motor mainly includes a motor shaft, an inner stator sleeve, an inner stator core and a winding, a hollow cup rotor, an outer stator core and a winding, and a drive control circuit. The inner and outer stator cores of the motor are coaxial, the inner and outer stator teeth are staggered at a certain angle in space, and the inner and outer stator windings are three-phase symmetrical windings. The hollow cup-shaped rotor of the motor is an inner and outer double-teeth rotor, the axes of the inner and outer double teeth are aligned in space, and the hollow cup-shaped rotor is placed in the gap between the inner and outer stator cores with the same axis. Through the control of the drive control circuit, there is a certain phase difference in the voltage of the three-phase symmetrical windings of the inner and outer stators corresponding to the motor, so that the electromagnetic drive torque formed by the inner and outer stator windings on the hollow cup rotor There is a phase difference of 180° in the pulsating torque component, and the pulsating torque can be suppressed well after being superimposed, which can improve the operating performance of the stepping motor.

Description

technical field [0001] The invention relates to a stepping motor, in particular to a novel dual-stator low-pulsation torque stepping motor. Background technique [0002] Stepper motor is a micro-motor that converts electrical pulses into angular displacement or linear displacement. Its angular displacement is proportional to the number of pulses, and has nothing to do with voltage and environment within the range of load capacity. It is mainly used as an executive element of an open-loop control system. Applications and places where precise positioning is required, such as printers, CNC machine tools, robot joints, etc., but the stepper motor has obvious oscillation during continuous operation, which is manifested as the fluctuation of the motor speed (resonance or jitter), and even lead to displacement in extreme cases. The front and rear vibration is the main factor affecting the speed stability of the stepping motor. The main reason for this phenomenon is that the moment-...

AI Technical Summary

Problems solved by technology

[0002] Stepping motor is a micro-motor that converts electrical pulses into angular displacement or linear displacement. Its angular displacement is proportional to the number of pulses and has nothing to do with voltage and environment within the range of load capacity. It is mainly used as an actuator of an open-loop control system and is widely used. Applications and printers, CNC machine tools, robot joints and other places that require precise positioning, but stepping motors have obvious oscillations during continuous operation, manifested as fluctuations in motor speed (resonance or jitter), and even lead to displacement in extreme cases Front and rear vibration is the main factor affecting the speed stability of stepping motors. The first reason for this phenomenon is that the moment-angle characteristics of stepping motors are close to sinusoidal functions, and the stator magnetic field rotates in a jumping manner.

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