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Method for detector-free operation of AC motor

A technology of AC motor and detector, applied in the direction of control generator, motor control, motor generator control, etc., can solve the problem of inaccurate supply, and achieve the effect of cost saving and effective operation

Pending Publication Date: 2021-02-23
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corresponding detectors or sensors can be used for this purpose, but more and more regions are created in which so-called detector-free control is sought, since additional components can thus be dispensed with due to vibrations during operation. This widget also often provides inaccurate values

Method used

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  • Method for detector-free operation of AC motor
  • Method for detector-free operation of AC motor
  • Method for detector-free operation of AC motor

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Experimental program
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Embodiment Construction

[0030] figure 1 A preferred embodiment of the method according to the invention for the sensorless operation of an AC machine using a flux model is shown schematically in a block diagram.

[0031] Alternating current machine 150 can be designed, for example, as an asynchronous machine (ASM) or as a permanent magnet synchronous machine (PMSM).

[0032] During the execution of the method, a given value I of the d-component of the stator current is specified d * is used as input value 101 , and a setpoint value n* of the rotational speed of AC motor 150 is specified as input value 106 .

[0033]At the comparison node (Vergleichsstelle) 102, from the given value I d *Subtract the actual value I of the d-component of the stator current from d , this actual value is determined by means of the flux model 200 and the measurements 115, as will be described further below. In a controller designed here, for example, as a PI controller 103, the d-component of the stator current is reg...

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Abstract

The invention relates to a method for the detector-free operation of an AC motor having a stator and a rotor, in particular a permanent magnet synchronous motor, by means of magnetic flux-directed control. A d-component of a stator current is controlled in a first control process, and a q-component of the stator current is controlled in a second control process; a stator voltage of an n-phase is determined from the d-component of the stator current and the q-component of the stator current; a rotor position angle is determined on the basis of the stator voltage of the n-phase by means of a magnetic flux model, and the stator voltage of n-phase is integrated in the process, wherein a first control of the d-component of the stator current and / or a second control of the q-component of the stator current is carried out on the basis of the determined rotor position angle; a corrected value of the resistance of the stator is determined in the magnetic flux model from the rotor magnetic fluxand the q component of the stator current, and the stator voltage of the n-phase is integrated in accordance with the determined corrected value.

Description

technical field [0001] The invention relates to a method for detector-free operation of an AC motor, in particular a permanent magnet synchronous motor (PMSM) or an asynchronous motor (ASM), by means of field-oriented regulation (FOR) and a computer for carrying out the method unit and a computer program. Background technique [0002] Alternating current motors, in particular electric motors, can be used in various industrial applications such as screwing systems, for example as drives for rotary axes. In order to regulate the speed and / or torque, for such an AC motor, it is often necessary to know the current rotor position angle. Corresponding detectors or sensors can be used for this purpose, but more and more regions are created in which so-called detector-free control is sought, since additional components can thus be dispensed with due to vibrations during operation. This widget also often provides inaccurate values. [0003] Such a detector-free field-oriented oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00
CPCH02P21/0003H02P21/141H02P21/16H02P21/18H02P21/24H02P29/64
Inventor V.舒乌艾伦
Owner ROBERT BOSCH GMBH