Drive system and method for operating such a drive system
First Claim
1. A drive system for an electric motor, comprising:
- a connection for a battery,an inverter having an input side connected to an intermediate circuit having a DC intermediate circuit voltage and an output side having a connection for the electric motor, said intermediate circuit comprising an intermediate circuit capacitance and a first thyristor connected directly in parallel with the intermediate circuit capacitance and configured to be activated by a monitor incorporated in or assigned to the drive system when a measure of the intermediate circuit voltage exceeds a predetermined threshold value so as to cause an armature short circuit of the electric motor,a rectifier having an input side connected at the output side of the inverter in parallel with the electric motor and the rectifier further having an output side providing a rectified DC output voltage which is a measure of the AC output voltage of the inverter, anda second thyristor connected to the output side of the rectifier and configured to be activated by a monitor incorporated in or assigned to the drive system when the rectified DC output voltage exceeds a predetermined threshold value.
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Accused Products
Abstract
A drive system for an electric motor includes a connection for a battery, and an inverter having an input side connected to an intermediate circuit and an output side having a connection for an electric motor. The intermediate circuit includes a first thyristor connected in parallel with an intermediate circuit capacitance. The drive system may also include a rectifier having an input side connected at the output side of the inverter in parallel with the electric motor, and a second thyristor connected an output side of the rectifier. The first/second thyristor are configured to be activated by a monitor incorporated in or assigned to the drive system. In the event of a malfunction, the input and/or output side of the inverter can be electrically isolated to allow a multiply redundant armature short circuit.
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Citations
10 Claims
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1. A drive system for an electric motor, comprising:
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a connection for a battery, an inverter having an input side connected to an intermediate circuit having a DC intermediate circuit voltage and an output side having a connection for the electric motor, said intermediate circuit comprising an intermediate circuit capacitance and a first thyristor connected directly in parallel with the intermediate circuit capacitance and configured to be activated by a monitor incorporated in or assigned to the drive system when a measure of the intermediate circuit voltage exceeds a predetermined threshold value so as to cause an armature short circuit of the electric motor, a rectifier having an input side connected at the output side of the inverter in parallel with the electric motor and the rectifier further having an output side providing a rectified DC output voltage which is a measure of the AC output voltage of the inverter, and a second thyristor connected to the output side of the rectifier and configured to be activated by a monitor incorporated in or assigned to the drive system when the rectified DC output voltage exceeds a predetermined threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification