Novel double-stator low-pulsating-torque stepping motor

Abstract

The invention relates to a novel double-stator low-pulsating-torque stepping motor which mainly comprises a motor rotating shaft, an inner stator sleeve, an inner stator core, an inner stator winding, hollow cup-shaped rotors, an outer stator core, an outer stator winding and a driving and control circuit. The inner stator core and the outer stator core of the motor are coaxial, inner stator teeth and outer stator teeth are staggered by a certain angle in space, and the inner stator winding and the outer stator winding are three-phase symmetry windings respectively. The hollow cup-shaped rotors of the motor are the inner and outer double-tooth rotors, the positions of the axes of inner and outer double teeth are aligned in space, and the hollow cup-shaped rotors are coaxially arranged in gaps of the inner stator core and the outer stator core. Voltages applied to the corresponding three-phase symmetry windings of an inner stator and an outer stator of the motor have a certain phase difference in time, pulsating torque components in solenoid driving torques formed by the inner stator winding and the outer stator winding on the hollow cup-shaped rotors have a 180-degree phase difference, the pulsating torque can be well restrained after overlapping is carried out, and the operation performance of the stepping motor can be improved.

Description

technical field [0001] The invention relates to a stepping motor, in particular to a novel stepping motor with double stators and low ripple torque. Background technique [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 the stepping motor. The first reason for this phenomenon is that the moment-angle chara...

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.

Images