CN1476151A

CN1476151A - Motor for variable displacement compressor

Info

Publication number: CN1476151A
Application number: CNA021257760A
Authority: CN
Inventors: 贤金; 金贤; 卢铁基
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2002-08-19
Filing date: 2002-08-19
Publication date: 2004-02-18

Abstract

The invention discloses a motor of a capacity variable compressor, which comprises a rotor and a stator, wherein slots 21 are formed on the stator 20 and are arranged along a circle at certain intervals, a main coil for forward rotation and an auxiliary coil for reverse rotation are wound on the slots 21 of the stator 20, the slots wound with the auxiliary coil for reverse rotation in the stator slots 21 are larger than the slots wound with the main coil for forward rotation, and the number ratio of the main coil to the auxiliary coil is as follows: 1: 1.02-1.40. The motor of the variable displacement compressor provided by the invention can reach the efficiency characteristic of more than 80% in both the forward direction and the reverse direction, so the motor is not limited by the operating characteristics of the rotating direction and the like, and can be used in many aspects.

Description

The motor of capacity variable type compressor

Technical field

The present invention relates to a kind of motor, then is about being used to refrigerate the motor of the capacity variable type compressor on the machine furtherly.

Background technology

General freezing and refrigeration uses the compressor of equipment to be extensive use of unidirectional induction machine, observes its formation and is divided into stator and rotor substantially.

Fig. 1 provides the figure of stator structure of the compressor electric motor of prior art.As shown in Figure 1, the stator 10 of prior art keeps a determining deviation landform grooving 11 along circle, wherein only be wound with ancillary coil groove 11 5. and 6. little than other grooves.A plurality of in addition grooves 11 are that benchmark is divided into 4 parts in upper and lower, left and right with the X/Y axle, and 4 parts are symmetrical.The upper end, right side only is shown in the drawing, and remainder is not expressed.

1. number, 2. number, 3. number and 4. number be wound with the main coil that is used for the motor positive rotation in the groove 11; And 6. 5. number number be wound with the ancillary coil that is used for the contrary rotation of motor.

Consider when motor positive rotation (folk prescription to rotation) and main coil to be adopted the lead thicker than ancillary coil, that is to say, than ancillary coil thick 10% to 30% in order to improve starting characteristic and efficiency characteristic.The number of turns of main coil will be on 1.1 to 1.6 times level of ancillary coil in addition.The reason that adopts so thick coil is in order to increase moment of torsion, and the reason that the number of turns is many is the principal element of the number of turns as induction coefficient, has the effect of phase retardation.That is to say, increase the principal current phase delay of main coil, the phase place of the auxiliary current of ancillary coil is spent than principal current fast 90, and obtained peak torque.

So designed motor is on some directions, such as, more than the efficiency characteristic (80%) that can bring into play on the positive direction more than the suitable level, but on opposite direction, compare about 60% efficient with the efficient of positive direction.

The compressor electric motor of prior art can only satisfy efficiency characteristic to rotation to folk prescription, lowly can't use its opposite spin efficient performance, adopts other motor according to the practical use needs, has caused the property applied flexibly of motor restricted.

Summary of the invention

Technical problem to be solved by this invention is to be provided at the motor that positive rotation and contrary rotation can both be satisfied the capacity variable type compressor of suitable efficiency characteristic.

The technical solution adopted in the present invention is: a kind of motor of capacity variable type compressor, have rotor and stator, be formed with the groove of arranging according to certain intervals along circle on the stator, be wound with positive rotation on the groove of stator and use ancillary coil with main coil and contrary the rotation, in stator slot, it is bigger with the groove of main coil than being wound with positive rotation with the groove of ancillary coil to be wound with contrary rotation, and the number of turns ratio of main coil and ancillary coil is: 1: 1.02～1.40.

By the motor of capacity variable type compressor provided by the present invention, can both reach efficiency characteristic more than 80% for forward and reverse and contrary direction, so this motor is not subjected to the restriction of the operating characteristic of direction of rotation etc., can be used in a lot of aspects.

Description of drawings

Fig. 1 is the figure of stator structure of the compressor electric motor of prior art.

Fig. 2 is the figure of the stator structure of capacity variable type compressor motor of the present invention.

Wherein:

10,20: stator 11,21: groove

Embodiment

Below in conjunction with accompanying drawing, the embodiment of the motor of capacity variable type compressor of the present invention is elaborated.

Core of the present invention is, can both reach more than certain level for positive rotation and contrary rotation efficiency, that is to say, more than 80%.

At first,, the thickness of winding wire is kept the level identical with prior art, that is to say, the thickness of main coil is designed to than ancillary coil thick 10% to 30% for the efficient that improves positive rotation reaches more than 80%.

For the efficient that improves contrary rotation reaches more than 80%, coil than being designed to the level different with prior art, be that is to say, in prior art, the ratio of main coil and ancillary coil is 1.1 to 1.6: 1, and the number of turns of twining on the main coil is more than the number of turns on the ancillary coil; In contrast, in the present invention, the ratio of main coil and ancillary coil is 1: 1.02～1.4, and the number of turns of twining on the main coil is lacked than the number of turns on the ancillary coil.As shown in Figure 2, because ancillary coil is wound with the more number of turns, the size of the groove of response is bigger or identical than main coil.

Drive experimental result in motor positive rotation and contrary rotation, the selected efficient of two directions that makes all arrives the above coil ratio of certain level (80%).

The level of the thickness position prior art by coil and suitable regulating winding ratio make the efficient of positive rotation and contrary rotation all reach the required suitable level of motor.

Claims

1. the motor of a capacity variable type compressor, have rotor and stator, be formed with the groove of arranging according to certain intervals along circle (21) on the stator (20), be wound with positive rotation on the groove (21) of stator (20) and use ancillary coil with main coil and contrary the rotation, it is characterized in that in stator slot (21), it is bigger with the groove of main coil than being wound with positive rotation with the groove of ancillary coil to be wound with contrary rotation, and the number of turns ratio of main coil and ancillary coil is: 1: 1.02～1.40.

2. the motor of capacity variable type compressor according to claim 1, the rugosity that it is characterized in that main coil is than ancillary coil thick 10% to 30%.