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High security anti-leakage magnetic motor rotor

A motor rotor, high-safety technology, applied in the direction of magnetic circuit rotating parts, electromechanical devices, electrical components, etc., can solve the problems of large motor stray loss, falling off motor operation, motor heating, etc., to improve safety and reliability, The effect of improving strength and rigidity and avoiding motor damage

Active Publication Date: 2019-04-16
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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  • High security anti-leakage magnetic motor rotor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] like figure 1 , figure 2 , image 3 As shown, the structure of the present invention includes a rotor core 13, a rotating shaft 11, a rotor end plate 12, a hinged hole bolt 14, a pressure-sensitive gasket 23, and a winding; the winding is wound on the rotor core 13; the rotor The iron core 13 is fixed on the rotating shaft 11, and it includes 4 fan-shaped solid magnetic pole cores. The rotor end plate 11 and hinged hole bolts 14 are all made of non-magnetic materials. The two ends of the fan-shaped solid magnetic pole cores have A plurality of hinged holes 15; the rotor end plate 12 is embedded with two pressure-sensitive gaskets 23, and the two pressure-sensitive gaskets 23 are center-symmetrical to the shaft hole in the center of the rotor end plate 12, and Each pressure-sensitive pad 23 corresponds to a fan-shaped solid magnetic pole core; there are several screw hole areas on the rotor end plate 12, wherein each screw hole area corresponds to a fan-shaped solid m...

Embodiment 2

[0026] The invention is used for a three-phase permanent magnet synchronous motor with 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.

[0027] 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.

[0028] End plates and hinged hole bolts at both ends of the rotor core:

[0029] (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 stainless steel mat...

Embodiment 3

[0058] The method for determining the preset rated value in the first embodiment includes the following steps:

[0059] S1. Manufacture a semicircular mold consistent with the aperture size of the hinged hole 32 and have grooves consistent with the shape and size of the dovetail groove 31 on its wall;

[0060] S2. Fix the pressure-sensing sheet in the groove in the mold in step S1, connect the pressure-sensing sheet to the pressure sensing device 22, and connect the pressure sensing device 22 to an external receiving device;

[0061] S3. Use a hydraulic press to pressurize the inner wall of the semicircular mold described in step S1. The die of the hydraulic press is only in full contact with the pressure sensing plate. Stop pressurization during shear stress, and record the pressure value displayed by the external receiving device, which is the rated value; the pressure is calculated by the pressure applied by the hydraulic press and the extrusion area of ​​the die of the hyd...

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Abstract

The invention discloses a high-safety magnetic-leakage resistant motor rotor, and the structure of the rotor comprises a rotating shaft, a rotor core, a winding, a rotor end plate, and reamed hole bolts. The rotor core is an iron core with a plurality of fan-shaped magnetic poles, and the rotor end plate and the reamed hole bolts are made of non-magnetic-conduction materials. Two ends of the rotor core are provided with reamed holes, and the reamed hole bolts enable the rotor end plate to be fixed at two ends of the rotor core, thereby preventing magnetic leakage. Moreover, the rotor end plate is also provided with a pressure sensing gasket in an embedded manner, and the pressure sensing gasket and pressure sensing pieces embedded into the reamed holes form a pressure sensing system. The pressure sensing system can transmit a pressure signal to an external receiving device, so that the external receiving device gives an alarm and switches off a power supply when the centrifugal force of the magnetic pole iron core exceeds a preset safety value, thereby guaranteeing the operation safety of a motor to maximum degree.

Description

technical field [0001] The invention relates to the field of motor manufacturing, in particular to a motor rotor with high safety 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. The birth of permanent magne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/28H02K11/20
CPCH02K1/28
Inventor 徐延平
Owner 泰州兆力电机有限公司
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