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Motor control apparatus

A technology of motor control and motor speed, applied in the direction of motor control, motor generator control, AC motor control, etc., to achieve the effect of improved stability and wide constant power area

Inactive Publication Date: 2014-08-06
SANYO DENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The present invention is completed in order to solve the above-mentioned problems of the existing motor control device, and its purpose is to provide a motor control device that can achieve the radial runout of the motor and the encoder when there is high-speed light-load rotation at the same time. The improvement of the stability of the radial runout and the suppression of the saturation of the inverter output voltage during high-speed and heavy-load rotation realize a wider constant power region

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0054] [Overall structure of the motor control device 100 ]

[0055] figure 1 It is a block diagram of the motor control device 100 of Embodiment 1.

[0056]The motor control device 100 includes a q-axis current controller 130 as a system for giving a q-axis voltage command VqC.

[0057] The q-axis current controller 130 inputs the current deviation obtained by subtracting the q-axis current feedback IqF from the input torque current command IqC, and calculates the q-axis voltage command VqC. The q-axis current feedback IqF is output from the coordinate converter 125 . The q-axis current feedback IqF is obtained by coordinate conversion of the motor currents Iu and Iv by the coordinate converter 125 based on the stator position command θmc described later. The q-axis current controller 130 is composed of a proportional-integral controller.

[0058] In addition, the motor control device 100 includes a field current command calculator 135 and a d-axis current controller 145...

Embodiment approach 2

[0105] [Overall structure of the motor control device 200 ]

[0106] Figure 4 It is a block diagram of the motor control device 200 of Embodiment 2. The motor control device 200 of Embodiment 2 adds a magnetic flux controller and a magnetic flux calculator to the structure of the motor control device 100 of Embodiment 1, and provides a magnetic flux command calculator instead of the field current command calculator 135 .

[0107] The motor control device 200 has a q-axis current controller 230 as a system for giving a q-axis voltage command VqC. The q-axis current controller 230 is the same as the q-axis current controller 130 of the first embodiment.

[0108] In addition, the motor control device 200 includes a magnetic flux command calculator 220 , a magnetic flux controller 240 , and a d-axis current controller 245 as a system for giving the d-axis voltage command VdC.

[0109] The magnetic flux command calculator 220 receives the input torque current command IqC and th...

Embodiment approach 3

[0160] [Overall structure of the motor control device 300 ]

[0161] Figure 7 It is a block diagram of the motor control device 300 of Embodiment 3. The motor control device 300 of Embodiment 3 adds a maximum primary current command calculator, a torque limit value calculator, a limiter, and a q-axis current calculator to the configuration of the motor control device 200 of Embodiment 2.

[0162] The motor control device 300 has a q-axis current controller 330 , a maximum primary current command calculator 375 , a torque limit calculator 385 , a limiter 390 , and a q-axis current calculator 395 as a system for giving a q-axis voltage command VqC. The q-axis current controller 330 is the same as the q-axis current controller 230 of the second embodiment.

[0163] The maximum primary current command calculator 375 calculates the maximum value of the primary current command supplied to the motor 380 and outputs it to the torque limit calculator 385 as the maximum primary curre...

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Abstract

The invention provides a motor control apparatus which realizes a wider constant-power area. A field current command arithmetic unit (135) uses a torque current command IqC and a motor rotating speed [omega]m to identify a rotation load status of a motor (110) and calculates a field current command IdC corresponding to the rotation load status. A motor drive part (q-axis current controller (130), d-axis current controller (145), a coordinate converter (160), a PWM controller (165) and a power converter (170)) uses the torque current command IqC and the calculated field current command IdC to drive the motor (180).

Description

technical field [0001] The invention relates to a motor control device capable of realizing a wider constant power region. Background technique [0002] The spindle of the machine tool requires both low-speed heavy cutting and high-speed cutting. Therefore, high torque at low-speed rotation and high-speed rotation are realized by using constant power control of field weakening. As a motor control device that performs constant power control, a device having the following configuration can be exemplified. [0003] Figure 10 is a block diagram of an existing motor control device. This motor control device operates as follows. [0004] First, the speed command is compared with the motor rotation speed ωm from the speed calculator 15 , and the q-axis current command IqC is obtained by the speed controller 20 . The motor rotational speed ωm output by the speed calculator 15 is calculated using the position feedback detected by the encoder 10 . The q-axis current command IqC ...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P27/04H02P21/05H02P21/14H02P21/18H02P21/22H02P21/24H02P23/04H02P23/07H02P23/14H02P27/08
CPCH02P21/02H02P21/22H02P27/06H02P2205/01
Inventor 井出勇治山崎悟史
Owner SANYO DENKI CO LTD
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