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41. 发明专利

DE3741595C1 未知
公开(公告)号：DE3741595C1
公开(公告)日：1989-07-06
申请号：DE3741595
申请日：1987-12-08
申请人： MAGNET MOTOR GMBH
发明人： GRUENDL ANDREAS DR , KROEMER JOACHIM DR , HEIDELBERG GOETZ
IPC分类号： H02M7/48
摘要： A converter has an invertor arrangement which is furnished with power semiconductor components. In the event of high voltages in the DC intermediate circuit, the rated voltage and the rated insulation voltage of the power semiconductor components in the invertor arrangement must be taken into account. Conventionally, the invertor arrangement was furnished with power semiconductor components whose rated voltage and rated insulation voltage exceeded the voltage in the DC intermediate circuit. In order to be able to use semiconductor components with lower rated voltages and rated insulation voltages, that is to say, in particular, cheaper components, the invention proposes connecting a plurality of invertors in series, that is to say in cascade, so that only a proportion of the overall DC voltage is applied to each partial intermediate circuit produced in this way, so that the power semiconductor components in each invertor can be components with a low rated voltage and rated insulation voltage. The invertors are regulated by a regulator device such that the voltage breakdown is equal within the invertor cascade. Controlled resistor arrangements are provided on the individual invertors or the invertors which are connected in groups, to protect against the voltage surges which occur briefly in the event of disturbances in the system.

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