CN205622451U - Segmentation stator group, motor and compressor - Google Patents

Abstract

The utility model provides a segmentation stator group, motor and compressor, segmentation stator group is including a n stator (A), the electromagnetic field that produces during the drive of i stator for the electromagnetic field angular discrepancy (img file='DDA0000925749200000011. TIF'wi='923'he='131' /) of an i+1 stator wherein, i=1, 2, 3... N 1 in any numerical value, Z1 is the motor stator number of slots, N is the stator number of motor, P is the number of pole -pairs of motor. The utility model provides a segmentation stator group, was the drive phase place angle that i+1 overlaps the stator ( theta when an i stator drove phase place angle theta with breakdown torque electric current angle or ( theta + beta ) beta ), using the invertion power supply drive and having the above -mentioned motor of segmenting stator group, make the electromagnetic field in the motor form oblique polar effect, the humorous torque peak that involves of every section stator production misplaces mutually, and then reaches the effect of effectively falling low -harmonic -wave and torque ripple, reduces the vibration and the noise of motor.

Description

Segmented stator group, motor and compressor

technical field

The utility model relates to the technical field of motor equipment, in particular to a segmented stator group, a motor and a compressor.

Background technique

With the improvement of users' demand for quietness, more and more motors have the demand for noise reduction.

At present, the noise of the motor is mainly the noise generated by the torque ripple and vibration of the motor. Common noise reduction technologies include rotor skew poles, stator slant slots, auxiliary slots on stator teeth, or rotor pole eccentricity.

However, the process of reducing torque ripple by the above-mentioned technology is relatively complicated and difficult to process, which seriously affects the effect of reducing torque ripple and further affects the effect of noise reduction.

Therefore, how to reduce harmonics and torque ripple, reduce vibration and noise is an urgent problem to be solved by those skilled in the art.

Utility model content

In view of this, the utility model provides a segmented stator group to reduce harmonics and torque ripple, vibration and noise. The utility model also provides a motor and a compressor with the above segmented stator group.

In order to achieve the above object, the utility model provides the following technical solutions:

A segmented stator group, characterized in that it includes n stators;

The angle deviation of the electromagnetic field generated when the i-th stator is driven relative to the electromagnetic field of the i+1-th stator

Wherein, any value in i=1, 2, 3...n-1;

Z1 is the number of motor stator slots;

n is the number of stators of the motor;

p is the number of pole pairs of the motor.

Preferably, in the above segmented stator group, the centerlines of the tooth slots of each stator are aligned.

Preferably, in the above segmented stator group, there is an included angle α between the centerlines of the alveoli of two adjacent stators, wherein,

Preferably, in the above segmented stator group, the interval L between two adjacent stators is filled with non-magnetic materials.

The utility model also provides a motor, which includes a rotor component and a segmented stator group as described in any one of the above items.

Preferably, in the above motor, the rotor component is a segmented rotor set, which has n rotors and is arranged in one-to-one correspondence with n stators.

Preferably, in the above motor, the gap between two adjacent rotors is filled with non-magnetic material.

Preferably, in the above electric motor, the power supply of the electric motor is n 2-level inverter power supplies.

Preferably, in the above motor, the power supply of the motor is a multi-level inverter power supply.

The utility model also provides a compressor, including a motor, and the motor is the motor described in any one of the above.

In the segmented stator group provided by the utility model, when the i-th stator drives the phase angle θ at the maximum torque current angle, the drive phase angle of the i+1 set of stators is (θ-β) or (θ+β). The motor with the above segmented stator group is driven by an inverter power supply, so that the electromagnetic field in the motor forms an oblique pole effect, and the harmonics and torque peaks generated by each stator are misaligned, thereby effectively reducing harmonics and torque ripple. , Reduce the vibration and noise of the motor.

The embodiment of the utility model also provides a motor and a compressor with the above segmented stator group. Since the above-mentioned segmented stator group has the above-mentioned technical effect, and has the same technical effect as the motor and compressor of the above-mentioned segmented stator group, it will not be repeated here.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the motor that the utility model embodiment provides;

Fig. 2 is a structural schematic diagram of the electromagnetic field angle deviation of the segmented stator group provided by the embodiment of the utility model;

Fig. 3 is a schematic structural diagram of the torque pulse of the segmented stator group provided by the embodiment of the present invention.

detailed description

The utility model provides a segmented stator group to reduce harmonic wave and torque ripple, and reduce vibration and noise. The utility model also provides a motor and a compressor with the above segmented stator group.

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1 and Fig. 2, Fig. 1 is a schematic structural diagram of the motor provided by the embodiment of the utility model; Fig. 2 is a schematic structural diagram of the electromagnetic field angle deviation of the segmented stator group provided by the embodiment of the utility model.

The embodiment of the utility model provides a segmented stator group, which is characterized in that it includes n stators A; the electromagnetic field generated when the i-th stator is driven is relative to the electromagnetic field angle deviation of the i+1-th stator Wherein, i=1, 2...n-1 any value; Z1 is the number of stator slots of the motor; n is the number of stators of the motor; p is the number of pole pairs of the motor.

In the segmented stator group provided by the embodiment of the present invention, when the i-th stator drives the phase angle θ at the maximum torque current angle, the drive phase angle of the i+1 set of stators is (θ-β) or (θ+β ). The inverter power is used to drive the motor with the above-mentioned segmented stator group, so that the electromagnetic field in the motor forms a skew pole effect, and the harmonics and torque peaks generated by each stator A are misaligned, thereby effectively reducing harmonics and torque ripple. Function, reduce the vibration and noise of the motor.

Taking the segmented stator group composed of two stators A as an example, as shown in Figure 3, the output torque ripple curve of the first stator is curve c, and the output torque ripple curve of the second stator is curve b. In the combined output torque ripple curve a of the first stator and the second stator, the peak and valley values of the curve c and the curve b cancel each other out, effectively reducing the ripple value of the motor. The specific values are shown in the table below:

Table 1 Comparison of stator torque ripple in two stages

It can be seen from the above table that the combined output torque ripple ratio of the first stator and the second stator is significantly reduced, thereby effectively reducing the vibration and noise of the motor.

Preferably, for the convenience of assembly, the centerlines of the slots of each stator A are aligned. That is, it is ensured that the teeth of the n stators are not dislocated so that the centerlines of the slots of each stator A are aligned. That is, by setting the phase angle deviation between the variable frequency power supplies corresponding to the stator A of the drive motor as β.

In the second embodiment, there is an angle α between the centerlines of the alveoli of two adjacent stators A, wherein, There is no longer any deviation in the phase angle between the variable frequency power supplies corresponding to each stator A. Preferably, the phase angles of the variable frequency power supply are all the maximum torque current angles. Through the above arrangement, the configuration of the power supply is facilitated.

In this embodiment, according to different load requirements, the corresponding i-th stator A can be selected to operate independently, or n stators A can be selected to operate together.

In order to ensure that the n stators A are independent of each other and ensure the safe operation of the motor, the distance L between two adjacent stators A meets the requirements of the electrical safety gap. Further, the space L between two adjacent stators A is filled with non-magnetic permeable material. Preferably, the non-magnetic material is filled in the magnetic steel slots of the rotor corresponding to the distance L between two adjacent stators A.

The utility model also provides a motor, which includes a rotor component and any segmented stator group as described above. Since the above-mentioned segmented stator group has the above-mentioned technical effect, the motor with the above-mentioned segmented stator group should also have the same technical effect, which will not be repeated here.

And, taking one rotor and two stators A as an example, during the operation of the motor, one set of stators and rotors operate in combination, and the other set of stators and rotors are driven to rotate. The controller scans the flux linkage of the motor in real time to monitor the stator and whether the rotor is faulty. By alternately using n stators and one rotor, the service life of the motor is effectively extended. And, when one stator A is damaged, another spare stator A can be used.

In order to reduce the cost of the motor, the rotor component is a segmented rotor group, which has n rotors and is arranged in one-to-one correspondence with n stators A. It is also possible to provide only one rotor.

Preferably, the gap between two adjacent rotors is filled with non-magnetic material, so as to ensure the safety performance of the motor operation.

In this embodiment, the power supply of the motor is n 2-level inverter power supplies. By setting n 2-level inverter power supplies in one-to-one correspondence with n stators A, the operation of a single stator A can be achieved, and the common operation of multiple stators A can also be realized, which facilitates the switching of stators A.

In order to reduce the number of components and simplify the structure of the motor, the power supply of the motor is a multi-level inverter power supply. Through the above arrangement, the cost of the motor is effectively reduced.

The embodiment of the utility model also provides a compressor, including any one of the motors mentioned above. Since the above-mentioned motor has the above-mentioned technical effect, the compressor having the above-mentioned motor should also have the same technical effect, which will not be repeated here.

Of course, the above-mentioned motors can also be applied to other high-efficiency permanent magnet motors that require noise reduction and vibration reduction, and are not specifically limited here and are all within the scope of protection.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. a sectionalized stator group, it is characterised in that include n stator (A)；

The electromagnetic field produced when i-th stator drives is relative to the electromagnetic field angular deviation of i+1 stator

Wherein, i=1,2,3 ... any one numerical value in n-1；

Z1 is motor stator slot number；

N is the stator number of motor；

P is the number of pole-pairs of motor.

Sectionalized stator group the most according to claim 1, it is characterised in that the tooth space centerline alignment of each described stator (A).

Sectionalized stator group the most according to claim 1, it is characterised in that between the tooth space centerline of adjacent two described stators (A), there is angle α, wherein,

4. according to the sectionalized stator group described in any one of claim 1-3, it is characterised in that be filled with non-magnet material in spacing L of adjacent two described stators (A).

5. a motor, including rotor part, it is characterised in that also include the sectionalized stator group as described in any one of claim 1-4.

Motor the most according to claim 5, it is characterised in that described rotor part is segmented rotor group, it has n rotor and arranges with n stator (A) one_to_one corresponding.

Motor the most according to claim 6, it is characterised in that be filled with non-magnet material in the gap of adjacent two described rotors.

8. according to the motor described in any one of claim 5-7, it is characterised in that the power supply of described motor is n 2 grades of inverters.

9. according to the motor described in any one of claim 5-7, it is characterised in that the power supply of described motor is multistage inverter.

10. a compressor, including motor, it is characterised in that described motor is the motor as described in any one of claim 5-9.