Solid state pre-charge module
First Claim
Patent Images
1. A pre-charge module comprising:
- a relay;
a transistor connected to the relay and to a power supply; and
a solid state device connected to a gate of the transistor, the solid state device controlling switching of the transistor such that the transistor is switched off when a voltage at a source of the transistor approaches a voltage at a drain of the transistor, to switch off the solid state device such that a capacitor is pre-charged, and providing a floating ground.
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Abstract
A solid state pre-charge module includes a relay, a transistor connected to the relay and a solid state device connected to the transistor. The solid state device controls switching of the transistor.
23 Citations
20 Claims
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1. A pre-charge module comprising:
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a relay; a transistor connected to the relay and to a power supply; and a solid state device connected to a gate of the transistor, the solid state device controlling switching of the transistor such that the transistor is switched off when a voltage at a source of the transistor approaches a voltage at a drain of the transistor, to switch off the solid state device such that a capacitor is pre-charged, and providing a floating ground. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A pre-charge module comprising:
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a relay; a transistor connected to the relay; a solid state device connected to the transistor, the solid state device controlling switching of the transistor and having a floating ground; and a photocoupler connected to a ground switch, the ground switch connected to the relay.
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15. A pre-charge architecture comprising:
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a capacitor connected to a main contactor; and a pre-charge module including a floating ground solid state device with electromechanical isolation, wherein the pre-charge module is connected across the main contactor, the pre-charge module having an electrical circuit that sets the delay and charging time for the capacitor to control a pre-charging of the capacitor and automatically switches off when the capacitor is pre-charged, the electrical circuit including a driver component switched by a transistor, wherein the transistor switching is determined based on a capacitor and resistor arrangement defining a predetermined pre-charge level for the capacitor. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification