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A power electronic converter and a method for controlling it

A technology for power electronics and converters, applied in the field of controlling power electronic converters, can solve problems such as reducing the quality of control

Active Publication Date: 2018-12-21
伟肯有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inconvenience associated with this approach is that this lower bound must be sufficiently long, i.e., to include a sufficient safety margin, in order to achieve acceptable operation under different conditions
[0005] Therefore, in some cases, the application of this lower limit may not necessarily lead to a reduction in the quality of the control

Method used

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  • A power electronic converter and a method for controlling it
  • A power electronic converter and a method for controlling it
  • A power electronic converter and a method for controlling it

Examples

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Embodiment Construction

[0041] The specific examples provided in the description below should not be construed as limiting the scope and / or applicability of the appended claims. Unless expressly stated otherwise, the list of examples and groups of examples provided in the description are not exhaustive.

[0042] Figure 1a A schematic illustration of an electric drive comprising: a motor 116 , a cable 115 , and a power electronic converter 100 according to an exemplary and non-limiting embodiment of the present invention is shown. One end of the cable 115 is connected to the armature winding of the electric machine 116 and the other end of the cable 115 is connected to the power electronic converter 100 . exist Figure 1a In the exemplary case shown, the power electronic converter 100 is a frequency converter and the electric machine 116 is a three-phase AC machine, which may be, for example, an induction machine, an electrically excited synchronous machine, or a permanent magnet synchronous machine....

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PUM

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Abstract

A power electronic converter comprises controllable switches (104-109) and a control system (110) for operating the controllable switches. The control system is configured to control the controllableswitches so as to produce at least one test voltage pulse. The power electronic converter comprises a voltage sensor (111) for detecting a reflected voltage that is caused by a reflection of the testvoltage pulse in an electric system connected to the power electronic converter. The control system is configured to control the operation of the power electronic converter at least partly in accordance with information based on the detection of the reflected voltage. The information can be used for example for determining forbidden voltage pulse lengths which would cause reflection-based over-voltages and / or for detecting faults such as short circuits and earth faults.

Description

technical field [0001] The present disclosure relates to a method for controlling a power electronic converter. Furthermore, the present disclosure relates to a power electronic converter and to an electric drive. Furthermore, the present disclosure relates to a computer program for controlling a power electronic converter. Background technique [0002] In many cases, a cable may be required between the power electronic converter and the motor, so that the length of the cable can be as long as, for example, 300 meters or even longer. The power electronic converter may be, for example, a frequency converter, and the electrical machine may be, for example, an alternator and / or alternator, or a transformer. Reasons for the need for long cables may be eg lack of space for the power electronic converter near the electric machine and / or ambient conditions unsuitable for the power electronic converter to be located near the electric machine. [0003] An inherent inconvenience as...

Claims

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Application Information

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IPC IPC(8): H02M7/5387G01R31/42
CPCG01R31/083G01R31/11H02M7/53871G01R31/42H02M1/32
Inventor N·瑟德J·波图
Owner 伟肯有限公司
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