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Method for operating a motor system, and motor system

A motor and current technology, applied in the field of motor systems, can solve problems such as motor heat loss and large loss of power semiconductors in drive circuits.

Active Publication Date: 2009-08-19
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in this case, unnecessary heat loss occurs in the motor, so more energy needs to be supplied to make the motor work
When the motor in the motor system that cannot bridge the drive circuit operates within the rated load operating range, a large loss is usually generated in the power semiconductor of the drive circuit

Method used

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  • Method for operating a motor system, and motor system
  • Method for operating a motor system, and motor system
  • Method for operating a motor system, and motor system

Examples

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Embodiment Construction

[0023] figure 1 Shown is a circuit diagram of an electric motor system 1 with an electric motor 2, for example an asynchronous motor or another type of brushless motor. In the exemplary embodiment shown, the motor 2 is operated by means of an AC power source 3 , which can be connected directly via a bridge circuit 4 (eg designed as a switch) or a drive circuit 5 . The drive circuit 5 modifies the alternating current from the alternating current source 3 according to a supplied control value S (for example by phase gating control) in order to apply partial power to the electric motor 2 .

[0024] The control value S is provided by a control unit 6 . The control unit 6 is connected to the bridge circuit 4 and performs an on-off operation so that the drive circuit 5 is bridged or not bridged. The control unit 6 can also be connected to a detection circuit 7 which measures a current in the motor 2 and thereby determines the load on the motor 2 . In addition, a temperature senso...

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PUM

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Abstract

In order to enable in a motor system (1), in which a soft start of the motor (2) has been implemented, the operation of the motor (2), wherein the power consumption is reduced, it is proposed to operate the driver circuit (5) during a switch-on phase in order to carry out a soft start of the motor (2), wherein the driver circuit (5) can be bypassed in a normal operational phase as a function of a load, by means of which the motor (2) is operated.

Description

technical field [0001] The invention relates to a method of operating an electric motor system having a drive circuit and an electric motor, and to such an electric motor system. Background technique [0002] The current motor system is equipped with different units that can realize the soft start of the motor according to different application fields. These units can prevent the motor from starting unstable when the maximum working voltage is applied immediately. For this purpose, it is usually necessary to equip the motor with a drive circuit and to control the drive circuit via the control unit in a suitable manner (for example by means of a phase cut-off control) in order to ensure that the voltage supplied to the motor increases slowly during the switch-on phase. The drive circuit generally has power semiconductors which dissipate part of the power supplied to the electric motor and convert it into loss heat. [0003] To reduce power losses in the drive circuit, the dr...

Claims

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Application Information

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IPC IPC(8): H02P1/00
CPCH02P1/04
Inventor 诺贝特·赖兴巴赫吉汉·塞茨
Owner SIEMENS AG