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AssigneeValeo Siemens eAutomotive Germany GmbH
InventorsRainer EDELHÄUSER, Thomas GÖTZE
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A device discharges an intermediate circuit capacitor. The device includes a power converter for supplying electricity to an electrical machine powering a vehicle, having the intermediate circuit capacitor and a discharge device with a series circuit of a controllable switching element and a load resistor, and a high-voltage battery feeding the power converter on the input side. The power converter has a control equipment to control the switching element, depending on a signal state at an input of the control equipment, to perform a fixed predefined number of switching operations, in which the switching element conducts, with a fixed predefined duration and a fixed predefined delay between two successive switching operations. The load resistor and its heat transfer to the power converter are set so that the load resistor is not damaged if a maximum constant voltage of the high-voltage battery is applied during a respective switching operation.
A device (1) for discharging an intermediate circuit capacitor (7), this device (1) comprising a power converter (2) for supplying electricity to an electrical machine (6) powering a vehicle, this power converter (2) having the intermediate circuit capacitor (7) and, connected in parallel with the intermediate circuit capacitor (7), a discharge device (8) with a series circuit of a controllable switching element (9) and a load resistor (10), and a high-voltage battery (3) feeding the power converter (2) on the input side,
A process for discharging an intermediate circuit capacitor (7) in a power converter (2) of a vehicle, this power converter (2) being used for supplying electricity to an electrical machine (6) powering the vehicle, this power converter (2) having the intermediate circuit capacitor (7) and, connected in parallel with the intermediate circuit capacitor (7), a discharge device (8) with a series circuit of a controllable switching element (9) and a load resistor (10), the switching element (9) being controlled, depending on a signal state, to perform a fixed predefined number of switching operations (18a-18e), in which the switching element (9) conducts, with a fixed predefined duration (19) and a fixed predefined delay (20) between two successive switching operations (18a-18e), the load resistor (10) and its heat transfer to the power converter (2) being set up so that the load resistor (10) is not damaged if a maximum constant voltage of a high-voltage battery (3) feeding the power converter (2) is applied to it during a respective switching operation (18a-18e) and it cools for the or a respective delay (20).
A process for producing a device (1) for discharging an intermediate circuit capacitor (7), this process comprising the following steps:
Dependencies are inferred from the claim text.