Apparatus for discharging a high-voltage bus
First Claim
1. A power inverter electrically connected to a high-voltage DC power source via a high-voltage bus, the power inverter comprising:
- a multi-phase inverter circuit electrically connected to positive and negative conductors of the high-voltage bus;
a bi-stable switch electrically connected in series with a discharge resistor between the positive and negative conductors of the high-voltage bus;
a capacitor electrically connected between the positive and negative conductors of the high-voltage bus;
first and second contactors;
first and second trigger circuits, wherein each of the first and second trigger circuits includes an inductive device that electrically connects to a signal line that is electrically connected to the respective first or second contactor via a resistance-capacitance circuit and a diode, and wherein each of the inductive devices includes an output line that is connected via an electric circuit to a gate of the bi-stable switch;
wherein the first and second contactors are controllable to electrically connect a respective one of the positive and negative conductors of the high-voltage bus to the high-voltage DC power source, wherein the first and second contactors are in communication with a respective one of the first and second trigger circuits;
wherein the bi-stable switch is controllable to provide a low-impedance electric current flow path through the discharge resistor between the positive and negative conductors of the high-voltage bus in response to an activation signal that is communicated from one of the first and second contactors to the gate of the bi-stable switch via one of the first and second trigger circuits and the electric circuit.
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Accused Products
Abstract
A power inverter includes a multi-phase inverter circuit electrically connected to positive and negative conductors of the high-voltage bus. A bi-stable switch is electrically connected in series with a discharge resistor between the positive and negative conductors of the high-voltage bus, and a capacitor is electrically connected between the positive and negative conductors of the high-voltage bus. First and second trigger circuits are in communication with a gate of the bi-stable switch, and first and second contactors are controllable to electrically connect a respective one of the positive and negative conductors of the high-voltage bus to the high-voltage DC power source. The bi-stable switch is controllable to provide a low-impedance electric current flow path through the discharge resistor between the positive and negative conductors of the high-voltage bus in response to an activation signal from one of the first and second high-voltage DC contactor circuits.
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Citations
17 Claims
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1. A power inverter electrically connected to a high-voltage DC power source via a high-voltage bus, the power inverter comprising:
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a multi-phase inverter circuit electrically connected to positive and negative conductors of the high-voltage bus; a bi-stable switch electrically connected in series with a discharge resistor between the positive and negative conductors of the high-voltage bus; a capacitor electrically connected between the positive and negative conductors of the high-voltage bus; first and second contactors; first and second trigger circuits, wherein each of the first and second trigger circuits includes an inductive device that electrically connects to a signal line that is electrically connected to the respective first or second contactor via a resistance-capacitance circuit and a diode, and wherein each of the inductive devices includes an output line that is connected via an electric circuit to a gate of the bi-stable switch; wherein the first and second contactors are controllable to electrically connect a respective one of the positive and negative conductors of the high-voltage bus to the high-voltage DC power source, wherein the first and second contactors are in communication with a respective one of the first and second trigger circuits; wherein the bi-stable switch is controllable to provide a low-impedance electric current flow path through the discharge resistor between the positive and negative conductors of the high-voltage bus in response to an activation signal that is communicated from one of the first and second contactors to the gate of the bi-stable switch via one of the first and second trigger circuits and the electric circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A power inverter disposed to control an electric machine, the power inverter being electrically connected to a high-voltage DC power source via a high-voltage bus, the power inverter comprising:
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a multi-phase inverter circuit electrically connected to positive and negative conductors of the high-voltage bus; a capacitor electrically connected between the positive and negative conductors of the high-voltage bus; a passive discharge circuit disposed between the positive and negative conductors of the high-voltage bus; first and second contactors controllable to electrically connect a respective one of the positive and negative conductors of the high-voltage bus to the high-voltage DC power source, and the first and second contactors in communication with a respective one of the first and second trigger circuits; and first and second trigger circuits, wherein each of the first and second trigger circuits includes an inductive device that electrically connects to a signal line that is electrically connected to the respective first or second contactor via a resistance-capacitance circuit and a diode, wherein each of the inductive devices includes an output line that is connected via an electric circuit to the passive discharge circuit; wherein the passive discharge circuit is controllable to provide an electric current flow path between the positive and negative conductors of the high-voltage bus in response to an activation signal to the positive discharge circuit that is communicated from one of the first and second contactor circuits via one of the first and second trigger circuits and the electric circuit. - View Dependent Claims (14, 15, 16, 17)
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Specification