GROUND FAULT DETECTION CIRCUIT FOR USE IN HIGH VOLTAGE MOTOR DRIVE APPLICATIONS
First Claim
1. An integrated ground fault detection circuit comprises:
- a shunt resistor provided on a positive rail of a DC bus;
a high voltage pocket including a sensory circuit connected to the shunt resistor and operable to detect a fault condition indicating a short circuit and a transmitter section operable to continuously transmit a fault condition signal indicating the fault condition; and
a low voltage pocket including a receiver operable to receive the fault condition signal from the sensory circuit and a logic unit, connected to the receiver, and operable to provide a fault output signal indicating the presence of a fault condition based on the fault condition signal.
2 Assignments
0 Petitions
Accused Products
Abstract
An integrated ground fault detection circuit in accordance with an embodiment of the present application includes a shunt resistor provided on a positive rail of a DC bus, a high voltage pocket including a sensory circuit connected to the shunt resistor and operable to detect a fault condition indicating a short circuit and a transmitter section operable to continuously transmit a fault condition signal indicating the fault condition and a low voltage pocket including a receiver operable to receive the fault condition signal from the sensory circuit and a logic unit, connected to the receiver, and operable to provide a fault output signal indicating the presence of a fault condition based on the fault condition signal.
16 Citations
18 Claims
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1. An integrated ground fault detection circuit comprises:
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a shunt resistor provided on a positive rail of a DC bus; a high voltage pocket including a sensory circuit connected to the shunt resistor and operable to detect a fault condition indicating a short circuit and a transmitter section operable to continuously transmit a fault condition signal indicating the fault condition; and a low voltage pocket including a receiver operable to receive the fault condition signal from the sensory circuit and a logic unit, connected to the receiver, and operable to provide a fault output signal indicating the presence of a fault condition based on the fault condition signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An integrated ground fault detection circuit for use in an inverter circuit connected to a motor comprises:
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a shunt resistor provided on a positive rail of a DC bus used to power the motor; a high voltage pocket including a sensory circuit connected to the shunt resistor and operable to detect a fault condition indicating a short circuit in at least one of the inverter circuit and the motor, and a transmitter section operable to continuously transmit a fault condition signal indicating the fault condition; and a low voltage pocket including a receiver operable to receive the fault condition signal from the sensory circuit and a logic unit, connected to the receiver and operable to provide a fault output signal indicating the presence of a fault condition based on the fault condition signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification