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High security anti-leakage permanent magnet synchronous motor

A permanent magnet synchronous motor, high-safety technology, applied in synchronous machine parts, magnetic circuits characterized by magnetic materials, magnetic circuit rotating parts, etc. Heat and other problems, to achieve the effect of improving safety and reliability, improving strength and rigidity, and avoiding motor damage

Active Publication Date: 2019-06-21
泰州兆力电机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problem that the rotor assembly of the existing permanent magnet synchronous motor has a large flux leakage coefficient, which causes a large stray loss of the motor, which causes the motor to generate heat, the utilization rate of the permanent magnet material is low, and the fan-shaped solid magnetic pole core of the rotor is easy to fall off due to centrifugal force, causing motor operation accidents. To solve the problem, provide a magnetic isolation structure in which non-magnetic materials are used on both sides of the rotor pole core to connect non-magnetic materials with hinged holes and bolts to the non-magnetic material rotor end plates

Method used

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Embodiment 1

[0020] Such as figure 1 , figure 2 , image 3 As shown, the structure of the present invention includes: a stator assembly, an anti-leakage rotor 45; and fixedly installed in the base 46; the anti-leakage rotor 45 includes: the rotor core 13, the rotating shaft 11, the rotor end plate 12, the hinged hole bolt 14, the pressure-sensitive gasket 23, and the winding; the winding is wound on the rotor core 13; the rotor core 13 is fixed on the rotating shaft 11, which includes 4 fan-shaped solid magnetic pole cores, and the rotor end plate 11 and hinged hole bolts 14 are non-magnetic There are several hinged holes 15 at both ends of the fan-shaped solid magnetic pole core; two pressure-sensitive gaskets 23 are embedded in the rotor end plate 12, and the two pressure-sensitive gaskets 23 are opposite to the rotor The axial hole in the center of the end plate 12 is symmetrical to the center, and each pressure-sensitive pad 23 corresponds to a fan-shaped solid pole core; there are...

Embodiment 2

[0027] The three-phase permanent magnet synchronous motor manufactured based on the present invention has a rated power of 500kw, a rated voltage of 6000v, a rated current of 51.6A, a frequency of 50HZ, and a rotating speed of 1000 rpm. The outer diameter of the rotor fan-shaped solid magnetic pole core is Φ500mm, the inner diameter of the rotor fan-shaped solid magnetic pole core (the outer diameter of the magnetic isolation sleeve) is Φ280mm, and the length of the iron core is 590mm.

[0028] The rotor end plate is made of non-magnetic material stainless steel with a thickness of 15mm. The hinged hole bolts are made of non-magnetic material stainless steel. The threaded part is M24, and the smooth part of the hinged hole is Φ25mm.

[0029] End plates and hinged hole bolts at both ends of the rotor core:

[0030] (1) The material is 304 stainless steel, the thickness of the end plate is 15mm, the smooth part of the hinged hole bolt is Φ25mm, and the quantity is 8 pieces. 304...

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Abstract

The invention discloses a high-security leakage flux-preventing permanent magnet synchronous motor, which structurally comprises a stator assembly and a leakage flux-preventing rotor, wherein the stator assembly comprises an engine base, a stator core, a stator coil, a bearing assembly, an external fan, an external fan cover, an end cover and an external cooler; the leakage flux-preventing rotor comprises a rotating shaft, a rotor core, a winding, rotor end plates and reamed hole bolts; the rotor core comprises a plurality of fan-shaped magnetic pole cores; a nonmagnetic material is adopted by the rotor end plates and the reamed hole bolts; reamed holes are arranged in two ends of the rotor core; the reamed hole bolts fix the rotor end plates at two ends of the rotor core to prevent leakage flux; pressure induction gaskets are also embedded into the rotor end plates; the pressure induction gaskets and pressure induction sheets embedded into the reamed holes form a pressure induction system; and a pressure signal can be sent to a signal receiving device of the engine base, so that the signal receiving device gives an alarm and cuts off a power supply when the centrifugal force of each magnetic pole core exceeds a preset safety value, and the operation security of the motor is ensured to the maximal extent.

Description

technical field [0001] The invention relates to the field of motor manufacturing, in particular to a permanent magnet synchronous motor with high safety factor and capable of effectively preventing magnetic flux leakage. Background technique [0002] On the AC power grid, people also widely use AC asynchronous motors to drive working machinery. AC asynchronous motors have the advantages of simple structure, reliable operation, long life, low cost, and easy maintenance. However, compared with synchronous motors, the generation of its rotating magnetic field needs to absorb reactive power from the grid, so the efficiency is low and the power factor is low, especially at light loads, which greatly increases the loss of lines and grids. For a long time, in occasions that do not require speed regulation, such as the drive of fans, water pumps, and ordinary machine tools, asynchronous motors still occupy a dominant position, and a large amount of electric energy is lost virtually...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K21/02H02K1/30H02K1/02H02K11/30
CPCH02K1/02H02K1/30H02K21/02
Inventor 徐延平
Owner 泰州兆力电机有限公司
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