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Method for operating an active converter connected to an electrical machine and device for its realization

A technology for operating connections and converters, applied in the field of devices implementing the method

Active Publication Date: 2020-04-17
SEG AUTOMOTIVE GERMANY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In the described method, a continuous changeover between active rectification and phase short-circuiting can take place and can no longer be concluded in a conventional manner

Method used

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  • Method for operating an active converter connected to an electrical machine and device for its realization
  • Method for operating an active converter connected to an electrical machine and device for its realization
  • Method for operating an active converter connected to an electrical machine and device for its realization

Examples

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Embodiment Construction

[0041] exist figure 1 In , various load shedding events are illustrated on the basis of an equivalent circuit diagram 100 of the on-board electrical system of a motor vehicle.

[0042] The equivalent circuit diagram 100 shows an electric machine 101 operating as a generator together with an associated active converter 102 . For details see Figure 6 . The electric machine 101 and the converter 102 are each connected to a switching point 104 via cables 103 each having a length of, for example, 1.5 meters and a cross-section of, for example, each 25 square millimeters. A capacitor 105 is connected between switching points 104 , as it is present, for example, at an external starting point of the vehicle. Switching point 104 is provided in the actual onboard electrical system for starting the motor vehicle from outside. A resistive load 107 is symbolically illustrated between other switching points 106 . A further capacitor 109 , representing the capacitance of the vehicle e...

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Abstract

In the active converter (102) connected to the electric machine (101), a clamping circuit is provided for activating the voltage clamping from a first point in time, and the converter (102) furthermore establishes for the load shedding response to be activated from the second point in time only if an activation condition exists; falls below the first threshold and / or the value characterizing the current flowing through at least one phase terminal (U-Y) is above the third threshold.

Description

technical field [0001] The invention relates to a method for operating an active converter connected to an electric machine and a device for implementing the method according to the respective preambles of the independent claims. Background technique [0002] In order to feed the DC power grid from an AC source, in particular the motor vehicle electrical system via an alternator, converters of various designs can be used which operate as rectifiers. In the on-board electrical system of a motor vehicle, corresponding to the three-phase, four-phase or five-phase alternators usually installed here, converters with six-pulse, eight-pulse or ten-pulse design are usually used. However, the invention is also suitable for converters with a different number of phases or pulses. [0003] If generators are then briefly referred to, in this case electric machines operable as generators and as motors can also be involved, for example so-called starter generators. A converter is then un...

Claims

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Application Information

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IPC IPC(8): H02J7/14H02P9/10H02P9/48H02P29/024
CPCH02P29/0241H02J7/1438H02P9/102H02P9/48H02H9/041H02H7/1252H02P9/12
Inventor P.梅林格
Owner SEG AUTOMOTIVE GERMANY GMBH
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