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Method and device for operating an electronically commutated servo motor and position control unit having a servo motor

A technology of servo motor and electronic commutation, which is applied in the direction of electronic commutation motor control, general control system, and control of electromechanical transmission devices, and can solve problems such as violation of current limit

Active Publication Date: 2016-01-27
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With such large angular uncertainties and other parameter fluctuations, controlling by commutation patterns imposed according to the sensed rotor position results in a violation of the current limit which can lead to an emergency shutdown of the motor by the power electronics

Method used

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  • Method and device for operating an electronically commutated servo motor and position control unit having a servo motor
  • Method and device for operating an electronically commutated servo motor and position control unit having a servo motor
  • Method and device for operating an electronically commutated servo motor and position control unit having a servo motor

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Embodiment Construction

[0039]figure 1 The positioner system 1 is shown with a servomotor 2 which is designed as an electronically commutated electric motor. The servomotor 2 drives the adjustment unit 4 via a motor shaft 3 via a mechanical device or transmission 5 . For example, the positioner system 1 can correspond to a throttle valve positioner, wherein the position of the throttle valve as an adjustment unit in the air supply system of the internal combustion engine is adjusted by corresponding actuation of the servomotor 2 .

[0040] The servomotor 2 is electrically controlled via a plurality of phase connections 6 . In this case, the servomotor 2 is designed as a three-phase electric motor. Apply phase voltage U to servo motor 2 a , U b , U c (phase potential), said phase voltages lead to a corresponding current consumption of the servomotor 2 , from which the torque provided by the servomotor 2 via the motor shaft 3 is generated.

[0041] The control of the servo motor 2 takes place via ...

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Abstract

The invention relates to a method for operating an electronically commutated servo motor (2), wherein the servo motor (2) is activated by a voltage space vector generated in accordance with a commutation pattern on the basis of a predefined torque and a rotor position (L) of a rotor of the servo motor (2) in accordance with an optimization target, wherein an activation range which indicates a range of permissible voltage space vectors is predefined, wherein the servo motor (2) is activated in such a way that only voltage space vectors within the activation range are used.

Description

technical field [0001] The invention relates to electronically commutated electric motors, especially for positioner applications, for example for throttle valve positioners. The invention also relates to measures for limiting the current in such a controlled electrical machine. Background technique [0002] In positioner applications, electronically commutated DC motors, so-called brushless DC motors, can also be used as an alternative to brush-commutated DC motors. Electronically commutated DC motors generally have a better efficiency and a smaller overall size with comparable specific power figures. However, in contrast to brush-commutated DC motors, electronically commutated DC motors must be electronically controlled or commutated, wherein relatively accurate knowledge of the rotor position is required in order to select the control voltage, and relatively accurate knowledge of Motor current is used for torque-based regulation. Inaccuracies in rotor position sensing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/12F02D11/10
CPCF02D11/106H02P21/0003H02P21/12G05B13/021
Inventor E·霍夫曼U·西贝尔D·施瓦茨曼T·毛克
Owner ROBERT BOSCH GMBH