Converter with redundant circuit topology
First Claim
1. A converter comprising:
- a DC link for providing a DC voltage between a positive line and a negative line;
a battery connecting the positive line and the negative line in the DC link;
at least two rectifiers connected to the DC link for producing the DC voltage from polyphase input AC voltages by DC voltage connections of the rectifiers, said DC voltage connections of the rectifiers being interconnected so as to form a first series connection;
at least two inverters connected to the DC link for producing polyphase output AC voltages to a connected load from the DC voltage by DC voltage connections of the inverters, said DC voltage connections of the inverters being interconnected so as to form a second series connection, said positive line and said negative line of the DC link having their input sides connected to one another via the first series connection and said positive line and said negative line of the DC link having their output sides connected to one another via the second series connection; and
a short circuit in at least one of the DC voltage connections of the rectifiers or inverters for short-circuiting connection contacts by which the DC voltage connections of the rectifiers and the inverters are connected to the first and second series connections,wherein the short circuit of at least one of the at least two inverters is formed by connecting the connection contacts of the at least one inverter by shorting second semiconductor switches of a half-bridge producing one of the polyphase output AC voltages, wherein a current to the load generated by the polyphase AC output voltages is blocked by a third semiconductor switch disposed between an polyphase AC output of the at least one inverter and the load when the second semiconductor switches are shorted.
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Accused Products
Abstract
A converter for an aircraft includes an intermediate circuit for providing a DC voltage between a positive line and a negative line, at least two rectifiers connected to the intermediate circuit to produce the DC voltage from input AC voltages and at least two inverters connected to the intermediate circuit to produce AC output voltages from the DC voltage. The DC voltage terminals of the rectifiers are connected to a first series circuit and the DC voltage terminals of the inverters are connected to a second series circuit. The positive line and the negative line of the intermediate circuit are connected on an input side via the first series circuit and on the output side via the second series circuit. At least one of the DC voltage terminals includes a short circuit for short-circuiting terminal contacts by which the DC voltage terminal is connected to the respective series circuit.
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Citations
11 Claims
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1. A converter comprising:
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a DC link for providing a DC voltage between a positive line and a negative line; a battery connecting the positive line and the negative line in the DC link; at least two rectifiers connected to the DC link for producing the DC voltage from polyphase input AC voltages by DC voltage connections of the rectifiers, said DC voltage connections of the rectifiers being interconnected so as to form a first series connection; at least two inverters connected to the DC link for producing polyphase output AC voltages to a connected load from the DC voltage by DC voltage connections of the inverters, said DC voltage connections of the inverters being interconnected so as to form a second series connection, said positive line and said negative line of the DC link having their input sides connected to one another via the first series connection and said positive line and said negative line of the DC link having their output sides connected to one another via the second series connection; and a short circuit in at least one of the DC voltage connections of the rectifiers or inverters for short-circuiting connection contacts by which the DC voltage connections of the rectifiers and the inverters are connected to the first and second series connections, wherein the short circuit of at least one of the at least two inverters is formed by connecting the connection contacts of the at least one inverter by shorting second semiconductor switches of a half-bridge producing one of the polyphase output AC voltages, wherein a current to the load generated by the polyphase AC output voltages is blocked by a third semiconductor switch disposed between an polyphase AC output of the at least one inverter and the load when the second semiconductor switches are shorted. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An aircraft, comprising:
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a polyphase electric drive motor for driving a propeller of the aircraft; a polyphase electric generator; and a converter configured to couple the electric generator to the electric drive motor, said converter including a DC link for providing a DC voltage between a positive line and a negative line, a battery connecting the positive line and the negative line in the DC link, at least two rectifiers connected to the DC link for producing the DC voltage from polyphase input AC voltages received from the polyphase electric generator by DC voltage connections of the rectifiers, said DC voltage connections of the rectifiers being interconnected so as to form a first series connection, at least two inverters connected to the DC link for producing polyphase output AC voltages for the polyphase electric drive motor connected to the inverters from the DC voltage by DC voltage connections of the inverters, said DC voltage connections of the inverters being interconnected so as to form a second series connection, said positive line and said negative line of the DC link having their input sides connected to one another via the first series connection and said positive line and said negative line of the DC link having their output sides connected to one another via the second series connection, and a short circuit in at least one of the DC voltage connections of the rectifiers or inverters for short-circuiting connection contacts by which the DC voltage connections of the rectifiers and the inverters are connected to the first and second series connections, wherein the short circuit of at least one of the at least two inverters is formed by connecting the connection contacts of the at least one inverter by shorting second semiconductor switches of a half-bridge producing one of the polyphase output AC voltages, wherein a current to the polyphase electric drive motor generated by the polyphase AC output voltages is blocked by a third semiconductor switch disposed between an polyphase AC output of the at least one inverter and the polyphase electric drive motor when the second semiconductor switches are shorted. - View Dependent Claims (9, 10, 11)
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Specification