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Motor control apparatus

A control device, motor technology, applied in the direction of motor generator control, AC motor control, electronic commutation motor control, etc.

Active Publication Date: 2013-08-07
YASKAWA DENKI KK +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011]Second, if the energized phase changes by the magnitude of the phase change amount near the energized phase with the minimum current, the current also fluctuates, and the control state is unstable

Method used

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Experimental program
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Embodiment Construction

[0033] Embodiments of the present invention will be described below with reference to the drawings. In each figure, the same code|symbol is attached|subjected to the same component.

[0034] figure 1 It is a block diagram of the motor control device 1 according to the first embodiment of the present invention.

[0035] The motor control device 1 includes: a motor 101 as a load; a current detector 102 that detects a phase current flowing through the motor 101; and a position detector 103 that detects the position of the motor 101.

[0036] Furthermore, the motor control device 1 includes: an inverter unit 104 that applies a voltage command (vdref, vqref) described later to the motor 101; d and the direction (q-axis) i perpendicular to the d-axis q A coordinate transformer 105 that performs coordinate transformation.

[0037] In addition, the motor control device 1 is equipped with a method for controlling the d-axis current command value idref and the q-axis current comman...

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PUM

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Abstract

An alternating-current motor control apparatus includes an inverter unit, a current-command divider, a current controller, a torque-variation calculator, and a phase angle generator. The current-command divider is configured to divide a command current amplitude into command current components based on a phase-angle command value that is a sum of the phase angle and an alternating current signal. The torque-variation calculator is configured to calculate a motor electric power based on the command voltage and either the motor current or the command current components and to calculate a torque variation based on the motor electric power. The phase angle generator is configured to generate a phase angle based on the torque variation.

Description

technical field [0001] The present invention relates to a motor control device capable of efficiently controlling a motor without being affected by fluctuations in motor parameters. Background technique [0002] As a method of efficiently driving a motor having magnetic saliency, a maximum torque control technique is known. The maximum torque control refers to maximizing the generated torque for the same magnitude of output current. The output current command is distributed to the d-axis current (current affecting magnetic flux) and the q-axis current (current affecting torque), and current control is performed based on the distributed current command. Available current amplitude I s , d-axis inductance L d , q-axis inductance L q , Induced voltage constant Φ a , the most suitable current phase angle β (the phase angle from the q-axis to the current vector) that provides the maximum torque condition is obtained through (1) formula. [0003] β = ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P23/14H02P21/00H02P21/22H02P23/16H02P27/04
CPCH02P21/06Y02P80/10
Inventor 井手耕三森本进也金成旻薛承基
Owner YASKAWA DENKI KK