Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1998-12-10
1999-12-21
LaBalle, Clayton
Electrical generator or motor structure
Dynamoelectric
Rotary
318599, 330 75, 327110, F16C 3906, F16C 3204
Patent
active
06005316&
ABSTRACT:
A method of controlling switching of a tri-state switching amplifier having two switching legs, two switches in each leg, and a load connected to the junction between the switches of each leg, a power supply and a capacitor connected to the opposite ends of each leg, a first pair of the switches defining an idle state in which current circulates through the load and the first pair of switches, a second pair of the switches defining a Charge state in which the load is connected to the power supply and current through the load increases and a third pair of switches defining a Discharge state in which the load is connected to the power supply and current through the load decreases, the method comprising generating a first PWM signal at the beginning of each pulse of a clock signal; generating a second PWM signal when a binary current error signal changes state; generating, at the beginning of each pulse of the clock signal, a Direction signal which is the inverse of the current error signal; and placing the amplifier in the idle state when the second PWM signal is present and otherwise placing the amplifier in the Charge state for one state of the Direction signal and placing the switches in the Discharge state for the other state of the Direction signal.
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English translation of Abstract of EPO 59103019 to Hirotsugu, entitled "Control Circuit For Magnetic Bearing", filed Dec. 12, 1982, Patent Abstracts of Japan.
Donner Irah H.
LaBalle Clayton
Mullins B
Revolve Magnetic Bearing Inc.
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