Permanent magnet synchronous motor starting mechanism

Abstract

The invention discloses a permanent magnet synchronous motor starting mechanism. The permanent magnet synchronous motor starting mechanism comprises an impeller and a rotor, wherein the impeller is provided an installing cavity, the installing cavity is internally provided with a driving sleeve, the rotor is connected with the driving sleeve, and therefore the rotor can drive the driving sleeve to rotate; a buffering piece is installed between the driving sleeve and the inner wall of the installing cavity, the buffering piece and the driving sleeve are mutually interfered in the radial direction, the buffering piece and the inner side wall of the installing cavity are mutually interfered in the radial direction, and therefore the driving sleeve is driven to rotate and drive the buffering piece to rotate, and then the buffering piece drives the impeller to rotate. According to the permanent magnet synchronous motor starting mechanism, the buffering piece and the driving sleeve are mutually interfered in the radial direction, the buffering piece and the inner side wall of the installing cavity are mutually interfered in the radial direction, and therefore the driving sleeve is driven to rotate and drive the buffering piece to rotate, and then the buffering piece drives the impeller to rotate, so that the purpose of starting is achieved, the rotating angle of the buffering piece is large, the starting success rate is high, the damage to a motor is small, and the structure is simple.

Description

technical field [0001] The invention relates to a starting mechanism of a permanent magnet synchronous motor. Background technique [0002] The existing permanent magnet synchronous motor starting mechanism generally drives the buffer member fixed on the impeller through the rotor, and this type of structure is fixed on the impeller due to the buffer member. The no-load range of the rotor at start-up is the difference between the sum of the angles occupied by the driver, the buffer, and the impeller limiting boss and the angle of a circle. As we all know, the synchronous motor has the characteristics of small starting torque, the smaller the no-load range during the starting process, the worse the starting reliability. [0003] Aiming at the above-mentioned deficiencies in the prior art, the Chinese utility model patent No. ZL201420009740.7 provides a permanent magnet synchronous motor starting device in a double-start mode, which is provided with several socketed c...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the Chinese utility model patent No. ZL201420009740.7 provides a permanent magnet synchronous motor starting device in a double-start mode, which is provided with several socketed cam mechanisms, which can increase the speed to a certain extent. No load range during large start-up, but also increases the complexity of the structure

Images