Load dump transient voltage controller
First Claim
1. A generator field regulator circuit that communicates with a field winding of a Lundell machine, comprising:
- a first transistor;
a second transistor having a source that communicates with a drain of said first transistor and a drain that communicates with one end of said field winding; and
a free-wheeling diode that communicates with said drain of said first transistor and a source of said second transistor.
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Accused Products
Abstract
A generator field regulator circuit communicates with a field winding of a Lundell machine and includes a first transistor. A second transistor has a source that communicates with a drain of the first transistor and a drain that communicates with one end of the field winding. A free-wheeling diode communicates with the drain of the first transistor and a source of the second transistor. An overvoltage detection circuit modulates a gate of the second transistor. A pulse width modulation (PWM) circuit modulates a gate of the first transistor to maintain generator rectified voltage at a nominal level. The overvoltage detection circuit outputs an overvoltage shutdown signal to the PWM circuit during a full-load dump mode to turn off the first transistor, which turns off the second transistor. The overvoltage shutdown signal is disabled when a terminal voltage of a generator falls below a predetermined voltage.
44 Citations
20 Claims
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1. A generator field regulator circuit that communicates with a field winding of a Lundell machine, comprising:
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a first transistor;
a second transistor having a source that communicates with a drain of said first transistor and a drain that communicates with one end of said field winding; and
a free-wheeling diode that communicates with said drain of said first transistor and a source of said second transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A generator assembly, comprising:
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a field regulator circuit including a first transistor, a second transistor, an overvoltage detection circuit that modulates a gate of said second transistor and that maintains said second transistor in an on state during a normal operating mode, and a pulse width modulation (PWM) circuit that modulates a gate of said first transistor to maintain generator rectified voltage at a nominal level;
a Lundell machine having a field winding that communicates with said field regulator circuit; and
a three-phase avalanche bridge rectifier that communicates with said Lundell machine. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A generator assembly, comprising:
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a field regulator circuit including a first transistor, a second transistor, an overvoltage detection circuit that modulates a gate of said second transistor and that maintains said second transistor in an on state during a normal operating mode, a pulse width modulation (PWM) circuit that modulates a gate of said first transistor to maintain generator rectified voltage at a nominal level, wherein said second transistor has a drain that communicates with one end of said field winding and said first transistor has a drain that communicates with a source of said second transistor, and a free-wheeling diode that communicates with said drain of said first transistor and a source of said second transistor;
a Lundell machine having a field winding that communicates with said field regulator circuit; and
a three-phase avalanche bridge rectifier that communicates with said Lundell machine, wherein said overvoltage detection circuit outputs an overvoltage shutdown signal to said PWM circuit during a full-load dump mode to turn off said first transistor, which turns off said second transistor.
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Specification