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Method and device for checking polyphase connection lines and bridge circuits for polyphase electric motors

A technology for bridging circuits and connecting lines, applied in circuit devices, emergency protection circuit devices, emergency protection devices with automatic disconnection, etc.

Active Publication Date: 2022-07-05
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, for example, the insulation of the individual cores (Adern) of the cable harness can be damaged, which can lead to short circuits
Likewise, the strands of a single core or an entire core may break, which causes an increase in the resistance of the line

Method used

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  • Method and device for checking polyphase connection lines and bridge circuits for polyphase electric motors
  • Method and device for checking polyphase connection lines and bridge circuits for polyphase electric motors
  • Method and device for checking polyphase connection lines and bridge circuits for polyphase electric motors

Examples

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Embodiment Construction

[0032] figure 1 An illustration of a multiphase connection line 100 is shown, which connects a multiphase electric motor 102 with a bridge circuit 104 , according to one embodiment. The electric motor 102, the connecting line 100 and the bridge circuit 104 are designed as three-phase. Here, the bridge circuit 104 passes through the first phase 106 on the first cable core (Ader) of the connecting line 100 , the second phase 108 on the second cable core of the connecting line 100 and the third cable on the connecting line 100 . The third phase 110 on the core is connected to the electric motor 102 . Each phase 106, 108, 110 of the bridge circuit 104 has two switching elements 112, 114, 116, 118, 120, 122, respectively. In this case, each high-side switch 112 , 116 , 120 is arranged between the respective phase 106 , 108 , 110 and the voltage potential 124 of the supply voltage. Each low-side switch 114 , 118 , 122 is arranged between the respective phase 106 , 108 , 110 and t...

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Abstract

The invention relates to a method for checking a multiphase connection line (100) for connecting a bridge circuit (104) to an electric motor (102), wherein the method has the step of switching , measurement steps and identification steps. In the switching step, at least one switching pattern of at least two switches (112, 114, 116, 118, 120, 122) of the bridge circuit (104) is switched. As a first switch (112, 114, 116, 118, 120, 122) of the switching mode, the bridge circuit (104) connected to the first phase (106) of the connecting line (100) is switched on First high side switch (112). The second switch ( 112 , 114 , 116 , 118 , 120 , 122 ) as the switching mode switches on the bridge circuit ( 104 ) connected to the second phase ( 108 ) of the connecting line ( 100 ). Second low side switch (118). In the step of measuring, the current produced by the switching pattern is measured. In the step of identifying, damage to the connecting line ( 100 ) is identified using the value of at least one current.

Description

technical field [0001] The present invention relates to an apparatus or method. A computer program is also the subject of the present invention. Background technique [0002] In the electric motor, the controller of the electric motor can be connected with the electric motor through the connecting line. The connection lines can be integrated into the vehicle's cable harness. The cable harness can be damaged by eg mechanical, chemical and / or thermal influences. In this case, for example, the insulation of the individual cable cores of the cable harness can be damaged, which can lead to short circuits. Likewise, the strands of a single core or an entire core may break, which results in an increase in the resistance of the line. [0003] In order for the electric motor and controller to operate as specified, undamaged connections are necessary. SUMMARY OF THE INVENTION [0004] In this context, with the solution proposed here, a method for checking a multiphase connectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P29/024G01R31/52G01R31/54G01R31/50H02H3/16H02H5/10H02H7/122
CPCH02P29/0243G01R31/54G01R31/52G01R31/50
Inventor R.克恩O.海纳
Owner ROBERT BOSCH GMBH
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