Electricity: single generator systems – Generator control – Odd number of brushes
Patent
1981-07-27
1983-05-10
Hickey, R. J.
Electricity: single generator systems
Generator control
Odd number of brushes
310102R, 318158, 318376, 322 63, H02P 910, H02P 914, H02P 716, H02P 314
Patent
active
043832130
ABSTRACT:
A dynamoelectric machine having a multiple of three poles and a corresponding multiple of three brushes is disclosed. Each of the poles are wound poles, two of each group of three poles being excited with a constant excitation during normal operation, the third of each group of poles being a control pole, excited so as to produce a flux that both varies in magnitude and reverses in polarity. With an input voltage connected to first and second brushes of each group of three, an output voltage may be derived from first and third brushes in a magnitude determined by the polarity and intensity of the field of the control pole. The machine is also adapted to provide mechanical output power from its rotating shaft, and also to accept input power from its rotating shaft. The output voltage obtainable may be varied between zero and the value of the input voltage, and also increased above the input voltage, and decreased below zero, reversing polarity. Means are also disclosed for providing regenerative braking of a motor driven by the output voltage of the machine and returning power to a battery power supply without increasing shaft speed of the machine, by augmenting the flux of a pole to increase the input voltage while maintaining the output voltage constant.
REFERENCES:
patent: 2388023 (1945-10-01), Tyrner
patent: 2528478 (1950-10-01), Tyrner
patent: 2592522 (1952-04-01), Hendrick et al.
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