Polyphase energy converter for outputting electrical energy

Abstract

An energy converter for outputting electrical energy is introduced. The energy converter has a plurality of converter sections (90-1, 90-2, 90-3). Each converter section (90-1, 90-2, 90-3) comprises at least one first converter cell module (70-1, 70-2) and one second converter cell module (80-1, 80-2), wherein the first and second converter cell modules (70-1, 70-2; 80-1, 80-2) each contain at least one converter cell (11) and one coupling unit (30, 50). The at least one converter cell (11) of the converter cell modules (70-1, 70-2, 80-1, 80-2) is connected between a first input (31, 51) and a second input (32, 52) of the coupling unit (30, 50), and the coupling unit (30, 50) is designed to connect the at least one converter cell (11) between a first terminal (41, 61) of the converter cell module (70-1, 70-2; 80-1, 80-2) and a second terminal (42, 62) of the converter cell module (70-1, 70-2; 80-1, 80-2) in response to a first control signal, and to connect the first terminal (41, 61) to the second terminal (42, 62) in response to a second control signal. According to the invention, the at least one converter cell (11) of the first converter cell modules (70-1, 70-2) is connected in a first polarity between the first input (31, 51) and the second input (32, 52) of the coupling unit (30, 50) of the respective first converter cell module (70-1, 70-2), and the at least one converter cell (11) of the second converter cell modules (80-1, 80-2) is connected in a second polarity, which is opposite the first polarity, between the first input (31, 51) and the second input (32, 52) of the coupling unit (30, 50) of the respective second converter cell module (80-1, 80-2). The invention also relates to a motor vehicle having an energy converter such as this, and to a method for supplying an electrical drive system.

Description

technical field [0001] The invention relates to a transducer for outputting electrical energy, a motor vehicle with such a transducer and a method for supplying an electric drive system. Background technique [0002] In the future, more battery systems will be applied, both in static applications and in vehicles such as hybrid and electric vehicles. In order to be able to meet the required voltage and power requirements for the respective application, a relatively high number of battery cells is connected in series. Since the current provided by such a battery has to flow through all battery cells, and a battery cell can only conduct a limited current, the battery cells are usually additionally connected in parallel in order to increase the maximum current. This can be achieved by arranging further cell packs within the battery cell housing or by connecting the battery cells externally. [0003] exist figure 1 shows a schematic circuit diagram of a typical electric drive ...

AI Technical Summary

Problems solved by technology

The protective relays 118 , 119 and the load protective relay 120 significantly increase the costs of the accumulator 110 because of the high demands placed on its reliability and on the current conducted by it

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