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Permanent Magnet Synchronous Motor Rotor

A permanent magnet synchronous motor and rotor technology, used in synchronous machines, synchronous machine parts, magnetic circuit rotating parts and other directions, can solve the problems of motor torque output performance deterioration, limit motor speed and other problems, to improve the maximum running speed, Guaranteed effect of torque output capability

Active Publication Date: 2018-06-26
SHANGHAI EXPLOSION PROOF MOTOR YANCHENG CO LTD SHUANGLONG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the basic electromagnetic relationship of the permanent magnet synchronous motor, the rotation back EMF of the motor increases with the increase of the speed. When the motor is running at high speed, the rotation back EMF is close to the power supply voltage, the current regulator is saturated, and the torque output performance of the motor deteriorates sharply, which limits the performance of the motor. The speed is further increased

Method used

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  • Permanent Magnet Synchronous Motor Rotor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 48mol Fe2O3, 24 mol MnO, 23mol ZnO, 2mol Ni 2 O 3 , Put it in the ball mill tank for the first ball milling, the ball milling time is 8 hours, the rotation speed is 220 rpm, take the solution out of the ball mill tank and put it in the oven for drying, and the dried powder is pre-burned. Pre-burning at 65% CO 2 +35%Ar atmosphere, time is 30 minutes, temperature is 500℃, then 3mol Cr is added 2 O 3 And 0.5 molSiC and then the second ball milling, the ball milling time is 6 hours, the speed is 225 rpm, take it out and dry, the second pre-burning time is 60 minutes, the temperature is about 800 ℃, the negative pressure is 0.05 MPa, the first The third burn-in time is 50 minutes, the temperature is 1000°C, 0.05MPa, the fourth burn-in time is 30 minutes, the temperature is 1200°C, the fifth burn-in time is 50 minutes, the temperature is 800°C, and the sixth time The burning time is 30 minutes, the temperature is 1200℃, the pressure is 0.09MPA, and then the seventh pre-burn...

Embodiment 2

[0028] Example 2: Combine 50mol Fe2O3, 25mol MnO, 22mol ZnO, 2mol Ni 2 O 3 , Put it in the ball mill tank for the first ball milling, the ball milling time is 8 hours, the rotation speed is 220 rpm, take the solution out of the ball mill tank and put it in the oven for drying, and the dried powder is pre-burned. Pre-burning at 65% CO 2 +35%Ar atmosphere, time is 30 minutes, temperature is 500℃, then 3mol Cr is added 2 O 3 And 0.5 molSiC and then the second ball milling, the ball milling time is 6 hours, the speed is 225 rpm, take it out and dry, the second pre-burning time is 60 minutes, the temperature is about 800 ℃, the negative pressure is 0.05 MPa, the first The third burn-in time is 50 minutes, the temperature is 1000°C, 0.05MPa, the fourth burn-in time is 30 minutes, the temperature is 1200°C, the fifth burn-in time is 50 minutes, the temperature is 800°C, and the sixth time The burning time is 30 minutes, the temperature is 1200℃, the pressure is 0.09MPA, and then the se...

Embodiment 3

[0029] Example 3: Combine 52mol Fe2O3, 23mol MnO, 26mol ZnO, 3mol Ni 2 O 3 , Put it in the ball mill tank for the first ball milling, the ball milling time is 8 hours, the rotation speed is 220 rpm, take the solution out of the ball mill tank and put it in the oven for drying, and the dried powder is pre-burned. Pre-burning at 65% CO 2 +35%Ar atmosphere, time is 30 minutes, temperature is 500℃, then 3mol Cr is added 2 O 3 And 0.5 molSiC and then the second ball milling, the ball milling time is 6 hours, the speed is 225 rpm, take it out and dry, the second pre-burning time is 60 minutes, the temperature is about 800 ℃, the negative pressure is 0.05 MPa, the first The third burn-in time is 50 minutes, the temperature is 1000°C, 0.05MPa, the fourth burn-in time is 30 minutes, the temperature is 1200°C, the fifth burn-in time is 50 minutes, the temperature is 800°C, and the sixth time The burning time is 30 minutes, the temperature is 1200℃, the pressure is 0.09MPA, and then the se...

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Abstract

The invention discloses permanent magnet synchronous motor rotor, and the rotor comprises a rotor body. The center of the rotor body is a hollow magnetic isolation ring, and the rotor body is provided with an even number N of symmetric radial permanent magnets. The interior of the rotor body is uniformly provided with an even number N of tangential chutes in a radial direction. The chutes are respectively located between each two adjacent radial permanent magnets, and the tail ends of the chutes are close to the magnetic isolation ring. The interior of each chute is provided with a magnetic field shielding block, and the magnetic field shielding blocks can slide along the chute freely. The tail ends of the chutes are provided with sealed cylinders, pistons and piston rods. The pistons are in sliding connection with the inner cavities of the cylinders. One end of each piston rod is fixedly connected with the corresponding piston, and the other end of each piston rod stretches out of the cylinder to be fixedly connected with the magnetic field shielding block. According to the invention, the magnetic field shielding block can be adjusted automatically according to the rotating speed of the rotor, and the flux path is changed through the position change of the magnetic field shielding block, thereby achieving the purpose of automatically reducing the permanent magnet flux along with the increase of the rotating speed, and increasing the maximum operating speed of a motor under the condition that the power voltage is not changed.

Description

Technical field [0001] The invention relates to a permanent magnet synchronous motor rotor. Background technique [0002] Permanent magnet synchronous motor is a kind of synchronous motor. Its excitation magnetic field is generated by permanent magnets, which eliminates excitation loss. It has the advantages of high power density, high efficiency and wide speed range. It is widely used in high-performance servo and motion control fields. [0003] Different from the electric excitation synchronous motor, the permanent magnet synchronous motor generates the excitation magnetic field by the permanent magnet, so the magnetic field intensity is generally constant. According to the basic electromagnetic relationship of the permanent magnet synchronous motor, the rotating back EMF of the motor increases with the increase in speed. When the motor is running at high speed, the rotating back EMF is close to the power supply voltage, the current regulator is saturated, and the torque output p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27H02K21/02C04B35/26
CPCC04B35/265C04B35/64C04B2235/3262C04B2235/3279C04B2235/3284C04B2235/661H02K1/276H02K21/028
Inventor 燕胜
Owner SHANGHAI EXPLOSION PROOF MOTOR YANCHENG CO LTD SHUANGLONG GRP
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