Torque control apparatus and torque control system of motor

A torque control and motor technology, applied in the field of torque control systems and torque control devices, can solve problems such as complexity, deterioration of torque accuracy, and large parameter errors, and achieve the effect of high-precision torque control and simple methods

Active Publication Date: 2017-06-20
SANKEN ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The inventors of the present application found that in the existing torque control device, since parameters such as magnetic flux and secondary resistance value that cannot be directly measured are used, there is a problem that the error of the parameters is large. As a result, the control of the torque In addition, due to the improvement of automatic tuning technology, the detection accuracy of the parameters of the induction motor will be improved, but the secondary resistance value of the induction motor will change after the winding temperature rises, so in the case of continuing to use the motor, there is a problem with the The problem that the torque accuracy gradually deteriorates at the beginning of operation; in addition, the control device of the above-mentioned Patent Document 1 is relatively complicated, and a simpler and more accurate torque control device is desired

Method used

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  • Torque control apparatus and torque control system of motor
  • Torque control apparatus and torque control system of motor
  • Torque control apparatus and torque control system of motor

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Embodiment 1

[0031] Embodiment 1 of the present application provides a torque control device for a motor, the torque control device outputs a q-axis current command value for torque control of an induction motor, and the q-axis current command value is used to generate a three-phase voltage value and And, the three-phase voltage value and Control the inverter section to output the output current i for driving the motor u i v and i w . In this embodiment, the three-phase voltage command value is generated and and make the inverter section generate output current i u i v and i w For the method of driving the motor to rotate, reference may be made to the prior art, which will not be repeated in this embodiment.

[0032] figure 2 is a schematic diagram of the composition of the torque control device of this embodiment, such as figure 2 As shown, the torque control device 20 may include a torque calculation unit 21 and a q-axis current command value calculation unit 22, wherei...

Embodiment 2

[0064] Embodiment 2 of the present application provides a motor torque control system for controlling the torque of the motor. The torque control system includes the torque control device described in Embodiment 1.

[0065] Figure 5 is a schematic diagram of the composition of the torque control system of this embodiment, such as Figure 5 As shown, the torque control system 500 includes a torque control device 501 , a three-phase voltage calculation unit 502 , an inverter unit 503 and a feedback signal generation unit 504 . in:

[0066] The torque control device 501 is used to generate a q-axis current command value The three-phase voltage calculation unit 502 based on the q-axis current command value d-axis current command value q-axis current feedback value i q and the d-axis current feedback value i d , calculate the three-phase voltage value and The inverter section 503 is at the three-phase voltage value and Under the control of , the DC power is conve...

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Abstract

The embodiment of the invention provides a torque control apparatus and torque control system of a motor. The torque control apparatus of a motor includes a torque calculating unit and a q axis current command value calculating unit, wherein the torque calculating unit calculates the torque of the motor according to the rotating speed and the output power of the motor; and the q axis current command value calculating unit calculates the q axis current commend value according to a torque commend and the torque calculated by the torque calculating unit. The torque control apparatus and torque control system of a motor cannot depend on parameters of an induction motor, and can control the torque, with high accuracy, during the running process of the motor in a simple mode.

Description

technical field [0001] The application relates to the electromechanical field, in particular to a torque control device and a torque control system for an electric motor. Background technique [0002] When the motor is running, it is necessary to control the torque of the motor, that is, according to the torque command, generate a current command and a voltage command for controlling the operation of the motor, and these current commands and voltage commands are further calculated to control the inverter to generate The output current used to drive the motor. [0003] figure 1 A schematic diagram of a torque control device in the prior art is shown, such as figure 1 As shown, in the existing torque control device, the torque command Multiply by the torque coefficient K calculated from the parameters of the induction motor t The reciprocal of 1 / K t To get the q-axis current command value Calculate the feedback signal i of the q-axis current q and q-axis current comma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/20H02P27/08
CPCH02P27/08
Inventor 中岛洋一郎
Owner SANKEN ELECTRIC CO LTD
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