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Design method of high-efficiency direct-current driving permanent magnet rotor motor

A DC drive, permanent magnet rotor technology, applied in the direction of single motor speed/torque control, synchronous machine, electrical components, etc., to achieve the effect of cost reduction

Pending Publication Date: 2021-11-16
SHENYANG LANYUE IND DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the deficiencies of the existing technology, the inventor submitted the patent "A Permanent Magnet Rotor Motor Structure and Its Control Method". The problem of high-efficiency and wide-range speed regulation of permanent magnet rotor motor

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention will be further described below in conjunction with embodiment.

[0028] The high-power permanent magnet rotor adopts a high-voltage DC-driven motor. Determine the rated torque T, the maximum torque Tmax, the maximum speed Smax in the speed regulation range = 1800rpm, and the minimum speed Smin = 500rpm. Determine the three-phase rated power supply voltage as VAC = 380VAC, The rectified DC voltage VDCmax=1.35*380VAC≈510VDC;

[0029] Calculate the DC voltage of the motor at the minimum speed:

[0030] VDCmin≈VDCmax*Smin / Smax=510*500 / 1800=142VDC;

[0031] Design the motor according to the motor DC voltage VDCmin=142VDC at the minimum speed, the minimum speed Smin=500rpm, the rated torque T, and the maximum torque TMax to achieve ideal efficiency;

[0032] Design the insulation level of the motor and the withstand voltage level of the motor controller according to VDCmax; design the mechanical strength of the motor according to Smax and Tmax;

[00...

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Abstract

The invention discloses a design method for a high-efficiency direct-current driving permanent magnet rotor motor, and the method comprises the following steps: determining a rated torque T, a maximum torque Tmax, a speed regulation interval highest rotating speed Smax, and a minimum rotating speed Smin, and determining a three-phase rated power supply voltage VAC and a rectified voltage VDCmax; calculating the direct-current voltage of the motor at the lowest rotating speed; designing the motor according to the direct-current voltage VDCmin of the motor at the lowest rotating speed, the lowest rotating speed Smin, the rated torque T and the maximum torque TMax, and achieving the rated efficiency; designing the insulation grade of the motor and the withstand voltage grade of the motor controller according to the VDCmax; and designing the mechanical strength of the motor according to the Smax and Tmax. The method relates to the technical field of motor design, adopts a direct current voltage regulation mode to regulate the speed of the permanent magnet rotor motor, the rotating speed is irrelevant to frequency control, the problem of weak magnetic speed regulation during super-synchronous operation of the permanent magnet synchronous motor is solved, the motor always operates in a high-efficiency range, the higher the rotating speed is, the higher the efficiency is, a low-power motor is adopted to drag a high-power load, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of motor design, in particular to a design method for a high-efficiency DC-driven permanent magnet rotor motor. Background technique [0002] There has always been a phenomenon of large horses and small carts in the field of electric motors. The power of the motor should be selected according to the power required by the production machinery, and try to make the motor run under the rated load. If the power of the motor is selected too small, the phenomenon of "small horse and big cart" will appear, causing the motor to be overloaded for a long time, causing its insulation to be damaged due to heat, and even the motor to be burned. If the power of the motor is too large, the phenomenon of "big horse and small cart" will appear. The output mechanical power cannot be fully utilized, and the power factor and efficiency are not high, which is not only unfavorable to users and the grid. And also can cause the wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/00H02P6/08G06F30/17
Inventor 杨猛
Owner SHENYANG LANYUE IND DESIGN