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AC-rotary-machine control device and electric power-steering system provided with AC-rotary-machine control device

A technology for rotating electrical machines and control devices, which is applied in the direction of AC motor control, control system, motor control, etc. It can solve the problems of resistance value error and inability to rotate AC rotating motors, and achieve the effect of simple structure

Active Publication Date: 2017-03-01
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] A control device for an AC rotating electric machine that sets the resistance value of an AC rotating electric machine to be controlled as a parameter of a model to be controlled and uses the model resistance value for control, and an electric power steering equipped with a control device for an AC rotating electric machine In the system, since the actual resistance value of the AC rotating electrical machine changes with the temperature change of the winding of the AC rotating electrical machine, there is the following problem: the actual resistance value is different from the resistance value set as the parameter of the model to be controlled (hereinafter , known as the model resistance value), the resistance value error occurs when there is a difference between them, so that the AC rotating motor cannot be rotated smoothly.

Method used

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  • AC-rotary-machine control device and electric power-steering system provided with AC-rotary-machine control device
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  • AC-rotary-machine control device and electric power-steering system provided with AC-rotary-machine control device

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Embodiment approach 1

[0062] figure 1 It is a diagram showing an example of a configuration of a control device for an AC rotating electric machine according to Embodiments 1 and 2 of the present invention. Should figure 1 is in, for example, the above-mentioned Patent Document 2 figure 1 In terms of the structure, it also has the structure of the temperature detection part 9 and the resistance value estimation part 10. figure 1 A control device 106 for the AC rotating electric machine is shown in , and an AC rotating electric machine 1 to be controlled is also shown, and the control device 106 for the AC rotating electric machine is integrally formed with the AC rotating electric machine 1 . Being integrated means that the control device 106 of the AC rotating electrical machine is connected adjacent to the AC rotating electrical machine 1, for example, refers to Figure 15 that kind of structure. In addition, the AC rotating electrical machine 1 is, for example, a synchronous motor, and is us...

Embodiment approach 2

[0155] The control device for an AC rotating electrical machine according to Embodiment 2 of the present invention basically has figure 1 structure shown. However, unlike Embodiment 1, the AC rotating electrical machine 1 is installed in a place separate from the control device 106 for the AC rotating electrical machine, and the AC rotating electrical machine 1 is installed in a place that is easier to heat than the control device 106 for the AC rotating electrical machine. place. For example, an electric power steering system targets a structure in which the AC rotating electrical machine 1 is installed in an engine compartment of a vehicle and a control device for the AC rotating electrical machine is installed near a driver's seat.

[0156] In addition, the AC rotating electrical machine 1 according to Embodiment 2 is, for example, a synchronous motor, and is used under operating conditions where a continuous energizing current is large. For example, an electric power ste...

Embodiment approach 3

[0184] Embodiment 3 of the present invention relates to an electric power steering system including a control device for an AC rotating electrical machine and an AC rotating electrical machine as follows, Figure 10 Showing its structure, this AC rotating electrical machine control device and AC rotating electrical machine have the figure 1 A configuration obtained by adding a command generation unit 11 to the configuration shown.

[0185] Figure 10 Among them, the electric power steering system is provided with a steering wheel 101 , a steering shaft 103 , a rack and pinion steering gear 105 , wheels 104 , an AC rotary motor 1 , a control device 106 for the AC rotary motor, and a torque detector 102 . A steering mechanism composed of a steering wheel 101 , a steering shaft 103 , a rack and pinion steering 105 , wheels 104 , and a torque detector 102 corresponds to a load device of the AC rotating electric machine 1 .

[0186] Figure 10 In this case, the steering torque a...

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PUM

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Abstract

If error exists between the actual resistance of an AC rotary machine and an estimated resistance estimated from the temperature outside said AC rotary machine, said AC rotary machine cannot rotate smoothly. In light thereof, this invention provides an AC-rotary-machine control device and the like, said AC-rotary-machine control device having a resistance estimation unit (10) that calculates an estimated resistance (Rest) by adding, to a base estimated resistance (Rest0) estimated from a detected temperature outside the AC rotary machine, an estimated-resistance correction value (Radd) that is determined such that pre-assessed bounds for the error ([delta]R) in the resistance fall within resistance-error bounds within which the AC rotary machine can rotate smoothly.

Description

technical field [0001] The present invention relates to a control device for an AC rotating electric machine having a configuration for estimating a winding resistance value of an AC rotating electric machine, and an electric power steering system including a control device for an AC rotating electric machine. Background technique [0002] Conventional control devices for AC rotating electrical machines, as shown in the following Patent Document 1 and Patent Document 2, estimate the speed and position of the rotor based on the resistance value of the winding, and use them instead of the signals detected by the position and speed sensors to perform sensorless control. . [0003] In addition, as another invention, as disclosed in the following Patent Document 3, a configuration is provided in which the resistance value of the winding that changes with temperature is estimated with high accuracy using the external temperature of the AC rotating electric machine and the current ...

Claims

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Application Information

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IPC IPC(8): H02P29/60
CPCH02P29/64H02P6/14H02P21/13H02P21/14H02P27/06
Inventor 土本祐也家造坊勋金原义彦中嶋俊介
Owner MITSUBISHI ELECTRIC CORP