CN203774997U - Shade pole type single-phase alternating current asynchronous motor with low vibration torque - Google Patents

Abstract

The utility model discloses a shade pole type single-phase alternating current asynchronous motor with low vibration torque, and particularly relates to a shade pole type composite single-phase alternating current asynchronous motor. The shade pole type single-phase alternating current asynchronous motor with low vibration torque comprises a rear end cover, a rear bearing, a machine seat, a 1# stator core, a 1# rotor core, a 1# stator winding, a 2# stator core, a 2# rotor core, a 2# stator winding, a front end cover, a front bearing, a rotation shaft, a 1# rotor winding, a 2# rotor winding and a phase-shift capacitor. The shade pole type composite single-phase alternating current asynchronous motor enables the vibration torque generated by two sets of shade pole type motors to right differ by an electrical angle of 180 degrees, and achieves the purpose of restraining the vibration torque through mutual compensation of positive and negative components of the vibration torque. If two generated vibration torque amplitude values are the same, the vibration torque is completely restrained. Besides, due to the fact that a branch circuit and a home circuit of a 2# motor with a series capacitor are capacitive, the power factor of the formed composite motor is higher than the power factors of the two original motors.

Description

Shaded Pole Single-phase AC Asynchronous Motor with Low Vibration Torque

technical field

The utility model relates to a single-phase AC shaded-pole asynchronous motor, in particular to a shaded-pole single-phase AC asynchronous motor with low vibration torque.

Background technique

The single-phase AC shaded pole asynchronous motor is one of the most used motors due to its simple structure, but because the generation of the rotating magnetic field is based on the setting of the shaded pole winding, the generated rotating magnetic field has serious ellipticity. There are severe vibration torques in operation. For the reduction of vibration torque, there is no good method so far. In the actual use of the motor, the vibration torque is equivalent to an excitation source, which will cause vibration and noise to the entire driven system.

Contents of the invention

The purpose of the utility model is to propose a shaded pole single-phase AC asynchronous motor with low vibration torque in view of the deficiencies in the prior art. the

The utility model is realized through the following technical solutions:

A shaded pole single-phase AC asynchronous motor with low vibration torque, including rear end cover, rear bearing, frame, 1# stator core, 1# rotor core, 1# stator winding, 2# stator core, and 2# rotor Iron core, 2# stator winding, front end cover, front bearing, rotating shaft, 1# rotor winding and 2# rotor winding; 

The 1# stator core and 2# stator core are fixed in the frame, the 1# stator winding is embedded in the 1# stator core, the 2# stator winding is embedded in the 2# stator core, and the 1# rotor winding is fixed in the 1# rotor core , The 2# rotor winding is fixed on the 2# rotor core, the rotor winding is a cage winding, the front bearing is concentrically fixed on the inside of the front end cover, the rear bearing is concentrically fixed on the inside of the rear end cover, the 1# rotor core and the 2# rotor core are fixed on the shaft One end of the shaft is fixed to the rear bearing, the other end is fixed to the front bearing, and is concentrically fixed on the inner side of the stator core through the rear end cover and front end cover, and the 1# rotor core is axially aligned with the 1# stator core, and the 2# rotor The iron core is axially aligned with the 2# stator core, the 1# rotor core can rotate relative to the 1# stator core, and the 2# rotor core can rotate relative to the 2# stator core. The windings are aligned axially, and the rotating magnetic fields generated by the 1# and 2# stators rotate in the same direction, and the fundamental components of the air-gap magnetic field generated by the two sets of shaded pole single-phase asynchronous motors are staggered by 90° electrical angle in the circumferential space. .

In terms of electrical connection, the stator winding M2 of the 2# shaded pole single-phase AC asynchronous motor is connected in series with the phase-shifting capacitor C, and connected in parallel with the stator winding M1 of the 1# shaded pole single-phase AC asynchronous motor, and connected to the single-phase AC power supply , so that the voltage phases applied to the stator windings of 1# and 2# shaded pole single-phase AC asynchronous motors are phase-shifted, and the voltage phases are 90° electrical angle different from each other.

Beneficial effects of the utility model: the shaded-pole compound single-phase AC asynchronous motor of the utility model makes the vibration torque generated by the two sets of shaded-pole motors exactly 180° electrical angle different from each other, and the positive and negative components of the vibration torque are mutually Compensation achieves the purpose of suppressing the vibration torque; the amplitude of the two generated vibration torques is the same, and the vibration torque is completely suppressed. Moreover, because the outlet of the 2# motor of the series capacitor is capacitive, the power factor of the composite motor formed is higher than that of the original two motors.

Description of drawings

Figure 1 is a schematic diagram of the structure of a shaded pole single-phase AC asynchronous motor with low vibration torque;

Fig. 2 is the vibration torque waveform diagram that two sets of motors produce;

Fig. 3 is the electrical schematic diagram of two sets of stator windings of a shaded pole single-phase AC asynchronous motor with low vibration torque;

Fig. 4 is a diagram showing the relative positions of the stator magnetic fields of the two sets of motors of the shaded pole type single-phase AC asynchronous motor with low vibration torque.

Detailed ways

Further describe the implementation of the present utility model below in conjunction with accompanying drawing.

As shown in Figure 1, Figure 3, and Figure 4, a single-phase AC shaded pole asynchronous motor with low vibration torque includes rear end cover 1, rear bearing 2, frame 3, 1# stator core 4, 1# Rotor core 5, 1# stator winding 6, 2# stator core 7, 2# rotor core 8, 2# stator winding 9, front cover 10, front bearing 11, rotating shaft 12, 1# rotor winding 13 and 2# rotor winding 14 ;

The 1# stator core 4 and 2# stator core 7 are fixed in the base 3, the 1# stator winding 6 is embedded in the 1# stator core 4, the 2# stator winding 9 is embedded in the 2# stator core 7, and the 1# rotor The winding 13 is fixed on the 1# rotor core 5, the 2# rotor winding 14 is fixed on the 2# rotor core 8, the rotor winding is a cage winding, the front bearing 11 is concentrically fixed on the inside of the front end cover of 10, and the rear bearing 2 is concentrically fixed on the rear end cover Inside 1, 1# rotor core 5 and 2# rotor core 8 are fixed on the rotating shaft 12, one end of the rotating shaft 12 is fixed to the rear bearing 2, the other end is fixed to the front bearing 11, and is concentrically fixed by the rear end cover 1 and the front end cover 10 1# rotor core 5 is axially aligned with 1# stator core 4, 2# rotor core 8 is axially aligned with 2# stator core 7, and 1# rotor core can be aligned with 1# stator core, The 2# rotor core can rotate relative to the 2# stator core.

This motor consists of two sets of stators and rotors of single-phase AC shaded-pole asynchronous motors with the same number of pole pairs, coaxial connection, co-rotation, and the same power. The stators of the shaded-pole single-phase AC asynchronous motor are fixed on the same frame The middle and rotor are connected coaxially to form a composite motor. The rotor is located in the stator and can rotate relative to the stator. The 1# rotor core is axially aligned with the 1# stator core, and the 2# rotor core is axially aligned with the 2# stator core. When a slot winding of the cage-type rotor winding is aligned axially, the relative positions of the stator magnetic fields of the 1# and 2# motors are shown in Figure 4, and the rotating magnetic fields generated by the 1# and 2# stators rotate in the same direction, that is, in the stator core The shaded pole windings are along the same side of the stator pole core, and the fundamental wave components of the air gap magnetic field generated by the two sets of shaded pole single-phase asynchronous motors are spatially staggered by 90° electrical angle;

As shown in Figure 2 and 3, in terms of electrical connection, the stator winding M2 of the 2# shaded pole single-phase AC asynchronous motor is connected in series with the phase-shifting capacitor C, and is connected in parallel with the stator winding M1 of the 1# shaded pole single-phase AC asynchronous motor , connected to the single-phase AC power supply, so that the voltage phases applied to the stator windings of 1# and 2# shaded pole type single-phase AC asynchronous motors are phase-shifted, and the voltage phases are 90° electrical angle different from each other. At this time, at the same time Two vibration torques with a phase difference of 180° electric angle are generated on the 1# rotor and the 2# rotor respectively. Through the mutual compensation of the two vibration torques with a phase difference of 180° electric angle, the vibration torque is positive at the same time. Negative components compensate each other to achieve the purpose of suppressing vibration torque. If the vibration torques generated by the two motors are the same, the vibration torques will completely cancel each other out.

Claims (2)

1. the shaded-pole single-phase ac asynchronous motor of low Vibration Torque, comprise rear end cap, rear bearing, support, 1# stator core, 1# rotor core, 1# stator winding, 2# stator core, 2# rotor core, 2# stator winding, front end housing, fore bearing, rotating shaft, 1# rotor winding and 2# rotor winding;

It is characterized in that: described 1# stator core, 2# stator core is fixed in support, 1# stator winding is embedded in 1# stator core, 2# stator winding is embedded in 2# stator core, 1# rotor winding is fixed on 1# rotor core, 2# rotor winding is fixed on 2# rotor core, rotor winding is cage modle winding, fore bearing is fixed on front end housing inner side with one heart, rear bearing is fixed on rear end cap inner side with one heart, 1# rotor core, 2# rotor core is fixed in rotating shaft, one end and the rear bearing of rotating shaft are fixed, the other end and fore bearing are fixed, and pass through rear end cap, front end housing is fixed on the inner side of stator core with one heart, and 1# rotor core and 1# stator core are axially aligned, 2# rotor core and 2# stator core are axially aligned, 1# rotor core can be with respect to 1# stator core, 2# rotor core can be rotated with respect to 2# stator core, when 1# rotor aligns vertically with the cage-type rotor winding groove winding of 2# rotor, and 1#, the rotating magnetic field direction of rotation that 2# stator produces is identical, the fundametal compoment of the air-gap field that two cover shaded-pole monopole asynchronous motors the produce 90 ° of electrical degrees that stagger mutually on circuferential spacing.

2. the shaded-pole single-phase ac asynchronous motor of low Vibration Torque according to claim 1, it is characterized in that: in electrical connection, wherein the stator winding M2 of 2# shaded-pole single-phase ac asynchronous motor connects with shift capacitor C, and in parallel with 1# shaded-pole single-phase ac asynchronous motor stator winding M1, be connected on single phase alternating current power supply, the voltage-phase that makes to be added on 1# and 2# shaded-pole single-phase ac asynchronous motor stator winding produces phase shift, and 90 ° of electrical degrees of voltage-phase mutual deviation.