Coreless brushless direct current motor with locking device

Abstract

The invention discloses a coreless brushless direct current motor with a locking device. The motor comprises a motor main body and a locking device. An output end is arranged at the front part of themotor main body. A locking device is arranged at the rear part of the motor main body. The motor main body realizes output of torque, rotating speed and power function indexes. The motor main body iscomposed of a front end cover, a stator armature, a casing, a rotor and a rear end cover. The front end cover is arranged at the front end of the casing, the rear end cover is arranged at the rear endof the casing, the rotor is installed in the middle of the casing, and the stator armature is arranged outside the rotor in a matching manner. By optimizing the sizes of parts of the motor, the rotorposition sensor and the locking device and through the multifunctional design of the parts, the size of the motor is fully utilized, the axial and radial sizes of the motor are reduced, and product miniaturization and high power density are achieved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a hollow cup brushless DC motor with a lock. Background technique [0002] The coreless brushless motor belongs to the DC permanent magnet servo micro motor. The main difference from the ordinary brushless DC motor is that there is no cogging on the armature core, and the motor winding is made into a cup-shaped motor according to a special winding process. . Compared with the traditional cogging motor, it has the following advantages: 1. High efficiency: the efficiency of the coreless motor is mostly above 70%, and some products are even close to 90%, while the efficiency of the traditional cogging motor is the same under the same volume and weight. Less than 70%; 2. Small size, light weight, high power and torque density: Due to the improved work efficiency and reduced loss, the power density of the coreless motor is greatly improved. Compared with the traditional cogging motor,...

AI Technical Summary

Problems solved by technology

However, the radial and axial dimensions of conventional electromagnetic brakes are generally large, which leads to the extension of the axial dimension of the rotor shaft system of the steering gear, which easily leads to the deterioration of the stiffness of the rotor system, especially when the rotor is running at high speed, causing vibration and noise of the steering gear. And the control is unstable, and the dynamic response, accuracy, reliability and other key variables of the steering gear will deteriorate further.

On the other hand, conventional brakes have a maximum speed limit, and the braking speed is generally below 8000rpm

In summary, the structure of the conventional reducer, motor, brake, etc., which is arranged axially according to the modular components, is difficult to meet the requirements of integration, miniaturization, multi-function, light weight, miniaturization, high dynamic response, and high reliability of the steering control servo system. Indicator requirements

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