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Two-pole self-starting permanent magnet synchronous motor rotor

A permanent magnet synchronous motor, self-starting technology, applied in synchronous machines, electrical components, electromechanical devices, etc., can solve the problems of increasing the air gap length of the motor, reducing operating efficiency and output capacity, and achieving improved torque output capacity, Improve the effect of starting difficulties

Active Publication Date: 2015-08-05
GREE ELECTRIC APPLIANCES INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The motor partially enlarges the air gap to weaken the braking torque of the magnetic steel, but this also increases the length of the air gap during normal operation of the motor, reducing the operating efficiency and output capacity

Method used

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  • Two-pole self-starting permanent magnet synchronous motor rotor
  • Two-pole self-starting permanent magnet synchronous motor rotor
  • Two-pole self-starting permanent magnet synchronous motor rotor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] like figure 1 Shown is a structural schematic diagram of the rotor of the two-pole self-starting permanent magnet synchronous motor of this embodiment. A rotating shaft hole a is processed in the center of the rotor core 1 for setting the rotating shaft of the compressor. The rotor core 1 is processed with squirrel-cage bar grooves b uniformly distributed along the circumference, and the squirrel-cage bar grooves b extend axially along the compressor rotating shaft. The squirrel-cage bar groove b is located radially outside the shaft hole a and is set close to the edge of the rotor core 1 . The cross-sectional shape of the squirrel cage guide bar groove b in this embodiment is circular, and is used to place the squirrel cage guide bar whose cross-sectional shape is also circular. The squirrel cage ring composed of squirrel cage guide bars with a circular cross-sectional shape is used. The large resistance of the squirrel cage guide bars can improve the starting abilit...

Embodiment 2

[0038] like Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that: the squirrel cage bar groove located on the side of the secondary magnetic steel 2' on the rotor core 1 is removed, and only on the outer (side) side of the magnetic steel 2 ( Figure 4 The upper and lower parts of the middle rotor) are provided with two sets of squirrel-cage bar slots b along the arc, and a magnetic isolation hole g is set between the squirrel-cage bar slots b and the magnetic steel slots c. Figure 4 middle arrow F magnetic The direction of the synthetic magnetic potential for the magnet steel, the arrow F cageIt is the combined magnetic potential direction of the squirrel cage bar, and in this embodiment, the angle α between the combined magnetic potential direction of the magnetic steel and the combined magnetic potential direction of the squirrel cage bar is 90°. Removing the squirrel cage guide bar groove on the rotor core 1 on the side of the secondary mag...

Embodiment 3

[0040] like Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that two sets of squirrel cage guide bar grooves b located on the side of the magnetic steel 2 and the adjacent auxiliary magnetic steel 2' are arranged on the rotor core 1, and each set of The squirrel cage guide bar grooves b are evenly spaced along the 1 / 4 arc of the rotor core 1 , and are symmetrically arranged with the center of the rotor core 1 as the symmetrical center. The two groups of squirrel cage bar slots b in this embodiment are located at the upper left corner and the lower right corner of the rotor core 1 , and the angle α between the combined magnetic potential direction of the magnetic steel and the combined magnetic potential direction of the squirrel cage bar is an acute angle.

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Abstract

The invention relates to a secondary self-starting permanent-magnet synchronous motor rotor. The iron core of the rotor is provided with a rotating shaft hole, rat-cage conducting bar grooves and magnetic steel grooves; rat-cage conducting bars are arranged in the rat-cage conducting bar grooves; magnetic steel is arranged in the magnetic steel grooves; the two pair of magnetic steel grooves are arranged like a letter V; an auxiliary magnetic steel groove is arranged between the two pair of magnetic steel grooves; the included angle formed by the auxiliary magnetic steel groove with the adjacent magnetic steel groove is 90 degrees or close to 90 degrees; and the magnetic potential direction of the magnetic steel is the same as that of the auxiliary magnetic steel. Because the auxiliary magnetic steel which is perpendicular or subvertical to the magnetic steel is arranged between the magnetic steels, and the magnetic potential direction of the magnetic steel is the same as that of the auxiliary magnetic steel, the magnetic potential direction of the magnetic steel can be reinforced by the auxiliary magnetic steel, the magnetic steel can be coupled to have higher magnetic potential, the torque output capacity of the rotor can be improved, and the problems of difficult starting for operating, low torque output capacity and lower output power of a self-starting permanent-magnet synchronous motor are solved.

Description

technical field [0001] The invention belongs to the technical field of synchronous motors, in particular to a rotor used in a two-pole self-starting permanent magnet synchronous motor. Background technique [0002] Due to the wide range of operating capabilities and comfortable and energy-saving user experience, variable frequency motors have been widely used in the field of home appliances. The theoretical model of the variable frequency motor is actually a synchronous motor. Compared with the asynchronous motor, the starting and running state of the synchronous motor is more complicated due to the addition of a drive control circuit, a detection device for the rotor position or a logic operation unit. Subsequently, a self-starting permanent magnet synchronous motor that combines the advantages of asynchronous and synchronous motors has appeared on the market. [0003] The application publication number is CN102214964 A, and the Chinese invention patent application titled ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K21/46H02K1/27
Inventor 洪飞
Owner GREE ELECTRIC APPLIANCES INC
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