Patent ID: 7495879

Claim:
A magnet control for controlling a magnet during a current flow established by applying a constant voltage, said magnet control comprising: a housing; magnet control circuitry mounted within the housing, the magnet control circuitry including an insulated gate bipolar transistor (IGBT) bridge configuration, wherein said IGBT bridge configuration comprises a LIFT HIGH IGBT, a LIFT LOW IGBT, a CLEAN HIGH IGBT, and a CLEAN LOW IGBT, wherein the magnet control circuitry controls current passing through the magnet; and DUMP circuitry interconnected with the magnet control circuitry, said DUMP circuitry comprises at least a DUMP HIGH IGBT, a discharge diode, and a discharge resistor thereby providing a discharge voltage control circuit, wherein the combination of said magnet control circuitry and said DUMP circuitry act to clamp the magnet voltage to a substantially constant value thereby resulting in the magnet current declining at a substantially linear rate whereby a discharge voltage control circuit is achieved.