A high-precision double-turn magnetic steel brushless DC motor

Abstract

Disclosed is a high-precision dual-ring magnetic steel brushless direct current motor. The high-precision dual-ring magnetic steel brushless direct current motor comprises a rotor system and a statorsystem; the rotor system comprises an outer mounting sleeve, an outer magnetic conducting ring, an outer magnetic conducting ring locking nut, an outer trapezoidal magnetic steel, an outer upper trapezoidal cushion ring, an outer lower trapezoidal cushion ring, an outer magnetic steel locking nut, a rotary plate, an outer assembly locking nut, an inner mounting sleeve, an inner magnetic conductingring, an inner magnetic conducting ring locking nut, an inner trapezoidal magnetic steel, an inner upper trapezoidal cushion ring, an inner lower trapezoidal cushion ring, an inner magnetic steel locking nut and an inner assembly locking nut; and the stator system comprises a stator framework, an aluminum substrate, a winding and epoxy resin adhesive. By adoption of the stator-iron-core-less dual-ring non-uniform-thickness tile type magnetic steel structure, magnetic hysteresis and eddy current loss caused by the iron core can be overcome, torque pulsation generated by a toothed groove can beeliminated, air gap flux density is increased and output torque is increased; and in addition, by adoption of the dual-ring non-uniform-thickness tile type magnetic steel to compensate leakage flux in the magnetic steel spliced position, the flat width of the air gap flux density is expanded, torque pulsation is further lowered and the torque precision is improved.

Description

technical field [0001] The invention relates to a permanent magnet brushless DC motor, especially a high-precision double-circle magnetic steel brushless DC motor with small torque ripple and large output torque, which belongs to the field of motors and is suitable for occasions with low power consumption and high torque. It is especially suitable for occasions that require high precision of the output speed. Background technique [0002] The reaction flywheel works near zero speed, and outputs control torque through the changed speed and positive and negative directions. The bias momentum wheel works near a certain high speed, and outputs control torque through acceleration and deceleration. The attitude control energy storage flywheel rotates at a higher speed, through the simultaneous acceleration and deceleration of the flywheels placed in pairs in opposite directions, the kinetic energy is stored and released, and the angular velocity is changed to output the control t...

AI Technical Summary

Problems solved by technology

However, there is end flux leakage at the splicing seam of the magnetic steel, which reduces the flat top width of the air gap flux density waveform, increases the torque ripple of the motor, and reduces the output torque accuracy

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