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A device and method for improving the utilization rate of permanent magnet motor starting cage bars

A technology of permanent magnet motor and utilization rate, which is applied in the direction of electromechanical devices, synchronous machines, electrical components, etc., can solve the problems of reducing the utilization rate of starter cages, achieve the goals of shortening start-up time, low manufacturing cost, and increasing the speed-up of magnetic field weakening effect of ability

Inactive Publication Date: 2017-02-08
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the starter cage only works when the motor is started, and the cage does not play a role when the motor is running stably, which reduces the utilization rate of the starter cage

Method used

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  • A device and method for improving the utilization rate of permanent magnet motor starting cage bars
  • A device and method for improving the utilization rate of permanent magnet motor starting cage bars
  • A device and method for improving the utilization rate of permanent magnet motor starting cage bars

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] like image 3 As shown, the right slide rail 7 is provided with a first conductive block 11 and a second conductive block 12 from bottom to top, the first conductive block 11 is connected to the second half section 3 of the starting cage, and the second conductive block 12 passes through the first thyristor 13. It is connected to the second half section 3 of the starting cage, and the second conductive block 12 is connected to the S pole of the first thyristor 13. When the motor reaches a medium speed after starting, the centrifugal force on the conductive slide 5 is greater than the elastic force of the spring 4, and the two ends of the conductive slide 5 Move upward in the left slide rail 6 and the right slide rail 7 respectively, the conductive slide 5 is connected with the second conductive block 12, and the first thyristor 13 limits the direction of the current in the starting cage, so that the direction of the eddy current generated by the starting cage is the same...

Embodiment 2

[0029] like Figure 4 As shown, referring to Embodiment 1, the right slide rail 7 is provided with a first conductive block 11 and a second conductive block 12 from bottom to top. The conductive block 12 is connected to the second half section 3 of the starting cage through the first thyristor 13, and the second conductive block 12 is connected to the S pole of the first thyristor 13. When the motor is ready to start or rotate at a low speed, the conductive slide 5 is connected to the first conductive block 11. Connected, resistor 14 reduces the current in the starting cage, thereby allowing the motor to obtain more starting torque.

Embodiment 3

[0031] like Figure 5 As shown, referring to Embodiment 2, the right slide rail 7 is provided with a first conductive block 11, a second conductive block 12 and a third conductive block 15 from bottom to top. Section 3 is connected, the second conductive block 12 is connected to the second half section 3 of the starting cage through the first thyristor 13, the second conducting block 12 is connected to the S pole of the first thyristor 13, and the third conducting block 15 is directly connected to the second half of the starting cage. Section 3 is connected. When the motor runs at a high speed, the conductive sliding plate 5 moves upward under the action of centrifugal force and is connected to the third conductive block 15. Due to the poor excitation performance of the ferrite permanent magnet rotor 1, the motor realizes a weak magnetic field increase. fast effect.

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Abstract

A device for increasing the utilization rate of a starting cage bar of a permanent magnet motor comprises a line selection integrated converter and a permanent magnet rotor made of a non-rare earth permanent magnetic material, wherein the line selection integrated converter divides the starting cage bar into divided front and rear sections and is connected with the front and back sections of the starting cage bar; the line selection integrated converter comprises a line selection switch and an eddy-current regulator for regulating the current direction; the selection switch is connected with the eddy-current regulator and is further connected with the front half section of the starting cage bar; the eddy-current regulator is connected with the rear half section of the starting cage bar; a thyristor for limiting the current direction in the starting cage bar is arranged on the eddy-current regulator.

Description

technical field [0001] The invention relates to the field of permanent magnet motors, in particular to a device and method for improving the utilization rate of starting cage bars of the permanent magnet motors. Background technique [0002] The operating principle of the permanent magnet synchronous motor is the same as that of the electric excitation synchronous motor, but it uses permanent magnets to provide excitation, which makes the motor structure simpler, reduces the processing and assembly costs, and saves the problem-prone collector rings and brushes. The reliability of the motor operation is improved; the excitation loss is omitted because the excitation current is not required, and the efficiency and power density of the motor are improved. Therefore, it has become a motor that has been studied more and more widely in various fields in recent years. [0003] There are many classification methods of permanent magnet synchronous motors: according to the direction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K21/46
CPCH02K21/46
Inventor 邱洪波伊然崔光照杨存祥安小宇金楠冯建勤孔汉董宇段强
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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