CN2862478Y

CN2862478Y - Magnetic-iron built-in type permanent magnetic synchro speed regulation motor rotor

Info

Publication number: CN2862478Y
Application number: CN 200520046138
Authority: CN
Inventors: 王鲁
Original assignee: Shanghai Hitachi Household Appliance Co Ltd
Current assignee: Shanghai Hitachi Household Appliance Co Ltd
Priority date: 2005-10-31
Filing date: 2005-10-31
Publication date: 2007-01-24
Anticipated expiration: 2015-10-31

Abstract

An isochronism speed governing motor rotor of permanent magnetism with magnets disposed inside mainly comprises a motor rotor that is provided with n pairs of magnetic poles and formed by laminated iron core punch plates. The rotor constitutes a 2n number of magnetic poles by a 2n number of magnets disposed tangentially; the polar arc of each magnetic pole maintains an electrical angle of 110-130 degree. The motor rotor is characterized in that a magnet is disposed in radial direction at the adjacent area of every two tangentially disposed magnets 3, with a total number of 2n magnets; an additional groove is provided at the gap between two tangentially disposed magnets 2 at the inner end of the radially disposed magnet; the outer end of the radially disposed magnet can keep the electrical angle of the polar arc of the magnetic pole between 110 - 130 degree, through cutting part of the surface of the magnetic pole or disposing an additional groove. Adoption of the above structure increases the salient pole ratio, the efficiency of the motor and the utilization ratio of magnetic material. When the motor adopts the same drive mode and equal current, the same power output will be achieved, with the size of the magnet reducing by 9% and the efficiency increasing by 1%-5%.

Description

Built-in magnet-type permanent magnet synchronous variable-speed rotor

Technical field

The utility model relates to the compressor of air conditioner motor, specifically refers to the improvement to built-in magnet-type permanent magnet synchronous variable-speed rotor.

Background technology

The built-in magnet-type permanent magnet synchronous variable-speed rotor that present compressor of air conditioner is used is according to its number of pole-pairs n, use the magnet 2 of 2n piece of arranged tangential to constitute 2n magnetic pole, and cut-out pole surface 7, outside diameter magnetic pole polar arc electrical degree is remained between 110-130 °, referring to Fig. 1.Utilize the magneto resistance effect torque but the motor that uses this rotor is less owing to mainly utilize the magnet torque, therefore efficient is lower and utilance magnetic material is lower under same magnet consumption situation.

Summary of the invention

The purpose of this utility model is to propose a kind of improved built-in magnet-type permanent magnet synchronous variable-speed rotor, by the change to its shape and structure, improves the utilance of efficiency of motor and magnetic material.

A kind of built-in magnet-type permanent magnet synchronous variable-speed rotor of the present utility model, be mainly one that build up by core stamping, have the rotor of n to magnetic pole, described rotor constitutes 2n magnetic pole with the magnet 2 of 2n piece of arranged tangential, the electrical degree of each magnetic pole polar arc remains between 110-130 °, the 1 piece of magnet of magnet 3 adjacent radial arrangement that it is characterized in that per two arranged tangential, be 2n altogether, the gap between this radial magnet medial extremity, the two tangential magnet 2 is provided with auxiliary tank.

The auxiliary tank of described radial magnet medial extremity is triangular in shape.

The outer end of described radial magnet can or be provided with the electrical degree that auxiliary tank makes the magnetic pole polar arc by the cut-out pole surface and remain between 110-130 °.

Be provided with the fabrication hole that connects whole rotor core 1 between per two pieces of radial magnet 3, described fabrication hole is spindle, and its middle part is a circular port, and two ends are auxiliary tank, and the middle part circular port can be used as rivet hole, and the auxiliary tank at two ends has the effect of the arrangement magnetic line of force.

Advantage of the present utility model is: make the motor salient pole than increasing by adopting above structure, improved the utilance of efficiency of motor and magnetic material.Salient pole is than the ratio that is motor Q axle inductance and D axle inductance, and salient pole is bigger than more, and the motor magneto resistance effect is big more, and the magneto resistance effect torque is big more.Adopt at motor under the situation of identical type of drive, identical currents, reach equally and exert oneself, the magnet volume has reduced 9%, and efficient has improved 1%-1.5% simultaneously.

Description of drawings

Fig. 1 is the rotor core schematic diagram of prior art;

Fig. 2 is the rotor core schematic diagram of an embodiment of the present utility model;

Fig. 3 is the rotor core schematic diagram of another embodiment.

Among the figure: 1 rotor core, 2 tangential magnet, 3 radial magnet, 4 spindle fabrication holes, 5 interior auxiliary tanks, 6 outer auxiliary tanks, 7 excision portions, 8 fabrication holes.

Execution mode

Now in conjunction with the embodiments and accompanying drawing the utility model is described in further detail.

Embodiment 1, is the built-in magnet-type permanent magnet synchronous variable-speed rotor of 3 pairs of utmost points, its core stamping such as Fig. 2.

This rotor uses 12 pieces of magnet arrangements to become 6 magnetic poles, and wherein 6 pieces of magnet 2 are by arranged tangential, and 6 pieces of magnet 3 are by radial arrangement, and radial magnet 3 is located at two tangential magnet 2 adjacents.The electrical degree of each magnetic pole polar arc remains between 110-130 °, gap between described radial magnet 3 medial extremitys, two tangential magnet 2 is provided with triangle auxiliary tank 5, this auxiliary tank 5 reduces the leakage field between tangential magnet and the radial magnet, can improve electric efficiency.

The outer end of described radial magnet 3, cut-out pole surface 7 remains between 110-130 ° the electrical degree of magnetic pole polar arc.

Embodiment 2, and is substantially the same manner as Example 1, but pole surface do not excised, and just the outboard end in described radial magnet 3 is provided with auxiliary tank 6, makes the electrical degree of magnetic pole polar arc remain between 110-130 ° its core stamping such as Fig. 3.

Referring to Fig. 2 or Fig. 3, relatively more rational relation should be between the physical dimensions tangential and radially two groups of magnet: the ratio L/D of the spacing L between two pieces of tangential magnet 2 of a pair of magnetic pole and the outer diameter D of rotor core 1 is between the 0.56-0.67; General radial magnet 3 is thicker than tangential magnet 2, and its thickness T ratio=T2/T1 is between 1.5-2.2; And tangential magnet 2 specific diameters are wide to magnet 3, and its width W ratio=W1/W2 is between 2-2.5.

Claims

1. built-in magnet-type permanent magnet synchronous variable-speed rotor, be mainly one 1 that build up by core stamping, have the rotor of n to magnetic pole, described rotor constitutes 2n magnetic pole with the magnet of 2n piece of arranged tangential, the electrical degree of each magnetic pole polar arc remains between 110-130 °, it is characterized in that 1 piece of radial magnet of per two tangential magnet adjacent radial arrangement, establish radial magnet 2n piece altogether.

2. built-in magnet-type permanent magnet synchronous variable-speed rotor according to claim 1 is characterized in that the outer end of described radial magnet, cut-out pole surface or be provided with auxiliary tank.

3. built-in magnet-type permanent magnet synchronous variable-speed rotor according to claim 1 and 2 is characterized in that the gap between this radial magnet medial extremity, two tangential magnet is provided with auxiliary tank.

4. built-in magnet-type permanent magnet synchronous variable-speed rotor according to claim 3 is characterized in that the auxiliary tank of described radial magnet medial extremity is triangular in shape.

5. built-in magnet-type permanent magnet synchronous variable-speed rotor according to claim 1 and 2, it is characterized in that being provided with between described per two pieces of radial magnet the fabrication hole that connects whole rotor core, described fabrication hole is spindle, and its middle part is a circular port, and two ends are auxiliary tank.

6. built-in magnet-type permanent magnet synchronous variable-speed rotor according to claim 1 and 2 is characterized in that the spacing between two pieces of tangential magnet of described a pair of magnetic pole and the ratio of rotor core external diameter are between 0.56 to 0.67.

7. built-in magnet-type permanent magnet synchronous variable-speed rotor according to claim 1 and 2 is characterized in that general radial magnet is thicker than tangential magnet, and its thickness is than between 1.5 to 2.2; And tangential magnet specific diameter is wide to magnet, and its width ratio is between the 2-2.5.