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US 12,663,470 B2Granted
Active wrap around circuit for mutually couples coils
AssigneeHamilton Sundstrand Corporation
InventorsVaibhav Kumar Somani, William E. Villano
Life of this patent
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Abstract
A circuit can include a voltage input and a first inductor coil of a first channel configured to interface with a second inductor coil of a second channel to induce voltage to a winding (e.g. a solenoid) via the first channel or the second channel. At least a first wraparound circuit of the first channel can be operatively connected to the first inductor coil to prevent interference from the second inductor coil from activating a wraparound circuit operatively connected to the first inductor coil.
Claims13
A circuit, comprising:
- a voltage input;
- a first inductor coil of a first channel configured to interface with a second inductor coil of a second channel to induce a voltage from the voltage input to a winding via the first channel or the second channel;
- a first wraparound circuit of the first channel operatively connected to the first inductor coil, the first wraparound circuit including a first transistor operatively connected to a first rail of the first inductor coil, wherein the first transistor is configured, if a fault has occurred in either of the first channel or the second channel, to shunt short circuit current in the first inductor coil through the first wraparound circuit to a ground reference of the first wraparound circuit;
- and
- a first switching module including a first high side switch operatively connected to a second rail of the first inductor coil and a first low side switch operatively connected to the first rail of the first inductor coil, the first switching module configured to provide excitation voltage to the first inductor coil.
2 more elements
Dependencies are inferred from the claim text.