Permanent-magnet, brushless and high-torque motor

Abstract

The invention discloses a permanent-magnet, brushless and high-torque motor, and relates to the field of motors. The motor comprises a stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are coaxially mounted by a rotating shaft which is fixed on an external base; the stator assembly comprises a stator housing, a stator body assembly and a phase changer assembly; the rotor assembly comprises a rotor magnetic conducting ring and a plurality of permanent magnets; the rotor magnetic conducting ring is circular and drives the rotating shaft to rotate; a stator winding coil inputs current current is inputted into a stator winding coil by an external driving circuit to provide a rotating magnetic field for the rotor assembly; the phase changer assembly and the stator winding coil are coaxially mounted; and the phase changer assembly is close to the end part of the stator winding coil, is sensitive to a position of the rotor assembly in a rotation process of the rotor assembly, feeds back a square signal to an external control circuit, and is used for controlling on-off of the current in the stator winding coil and feeds back a square signal to an external control circuit used for controlling on-off of the current in the stator winding coil. The motor has higher output torque and a smaller heat load value under smaller size, and is particularly suitable for application in a space environment.

Description

technical field [0001] The invention relates to a motor, in particular to a permanent magnet brushless high-torque motor used for a conical scanning infrared earth sensor. Background technique [0002] In the equipment of various aircrafts, it is often necessary for some actuators to rotate to generate a certain rotation angle field of view to meet the various functional needs of the aircraft. It is required that the actuators that drive these rotating mechanisms not only meet a certain driving capability requirement, but also meet a certain rotational accuracy, so as to meet the dynamic control performance of the entire mechanism. Especially in the long-life mechanism, in order to overcome the harsher environmental conditions of the product and the increase of the product life, the friction of its components will become worse. In the case of abnormal blockage of components, the output capacity can still be guaranteed for a long time, so that when the space environment or c...

AI Technical Summary

Problems solved by technology

The improvement of the motor torque mainly depends on the increase of the current and the working magnetic field. The selection of an excessive current will not only cause the temperature rise of the motor to be too high when the rotor is locked, but also cause difficulties in the thermal derating design of the motor drive part.

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