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Method for operating a current converter and current converter operating according to said method

A rectifier, operating temperature technology, applied in the direction of converting AC power input to DC power output, converting DC power input to DC power output, instruments, etc., can solve the problem of high power loss, achieve the effect of reducing power loss and improving efficiency

Active Publication Date: 2019-05-03
VALEO EAUTOMOTIVE GERMANY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During operation, this results in an undesirably high proportion of electrical losses during the (switching) switching process of the semiconductor switch

Method used

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  • Method for operating a current converter and current converter operating according to said method
  • Method for operating a current converter and current converter operating according to said method
  • Method for operating a current converter and current converter operating according to said method

Examples

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Embodiment Construction

[0041] exist figure 1 In , a (drive) electric machine 2 of an electrically driven motor vehicle, in particular an electric and measuring or hybrid vehicle, not shown further is shown. In this exemplary embodiment, the electric machine 2 comprises an electric energy store 4 inside the vehicle in the form of a high-voltage battery pack and an electric motor 6 which drives the axle of the motor vehicle. In this case, the electric motor 6 , which is embodied, for example, as a synchronous or asynchronous motor, is connected to the energy store 4 by means of a rectifier 8 , which is embodied as an inverter.

[0042] The rectifier 8 has a go line 10a and a return line 10b. The outgoing line 10 a and the return line 10 b are part of the intermediate circuit 10 with which the rectifier 8 is connected to the energy store 4 . An intermediate circuit capacitor 12 and a bridge circuit 14 with three bridge modules (half bridge, commutation unit) 16 are connected between the lines 10a and...

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PUM

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Abstract

The invention relates to a method for operating a current converter (8), in particular of an electric machine (2), in which, for the or for each semiconductor switch (22) of the current converter (8),a control signal (P') for setting a switch-off speed (Anew) is generated, wherein an electric intermediate circuit voltage (Udc) of an intermediate circuit (10) is measured and compared to a voltagethreshold value (Uthresh), wherein an operating temperature (TB) of the respective semiconductor circuit (22) is measured and compared to a temperature threshold value (Tthresh), wherein a load current (Ic) switched by means of the respective semiconductor circuit (22) is measured and compared to a current threshold value (Ithresh), and wherein the control signal (P') for setting the switch-off speed (Anew) is generated on the basis of the comparisons.

Description

technical field [0001] The invention relates to a method for operating a rectifier, in particular a rectifier of an electric machine, with which a control signal is generated for a semiconductor switch or each semiconductor switch of the rectifier for adjusting the switch-off speed of the semiconductor switch. The invention also relates to a collator operating according to the method and to an electric machine with such a rectifier. Background technique [0002] Electric (electrically) driven motor vehicles, such as electric vehicles or hybrid vehicles, usually have an electric machine or electric motors for driving one or two motor axles. Such an electric drive generally includes a controlled synchronous or asynchronous electric machine as an electric motor, which is coupled to an energy store (high-voltage battery pack) inside the vehicle for energy supply. [0003] Electric motors of electrical machines conventionally comprise a rotor mounted rotatably relative to a stat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/08H03K17/16H03K17/042H03K7/08H02M3/155H03K17/08H02M1/00
CPCB60L15/08H03K17/163H03K17/168B60L2210/40B60L2240/525B60L2240/529B60L2240/527H02M7/53875H03K17/14H03K2217/0036Y02T10/64Y02T10/72H02M3/155H03K17/145H02M1/0029
Inventor 谷琼霍格尔·霍夫曼托马斯·斯拉维克
Owner VALEO EAUTOMOTIVE GERMANY GMBH