Control for a brushless generator operable in generating and starting modes
First Claim
1. A detector for detecting rotor position of a brushless generator having a motive power shaft, a permanent magnet generator (PMG) coupled to the shaft, the PMG having a set of armature phase windings at which a set of PMG phase outputs are produced, and a main generator portion coupled to the shaft, the main generator portion having a set of armature phase windings capable of receiving AC power, comprising:
- means coupled to the PMG armature phase windings for deriving a number of internal pulses per revolution of the motive power shaft from the PMG phase outputs;
means coupled to the deriving means for measuring time periods between adjacent interval pulses; and
means coupled to the measuring means for converting the measured time periods into an indication of the angular position of the motive power shaft.
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Accused Products
Abstract
A detector for detecting rotor position of a brushless generator having a motive power shaft, a permanent magnet generator (PMG) having a set of armature phase windings and a main generator portion having a set of armature phase windings includes a circuit coupled to the armature phase windings of the PMG for deriving a number of interval pulses per revolution of the motive power shaft. A circuit measures time periods between adjacent interval pulses and the measured time periods are converted into an indication of the angular position of the motive power shaft in accordance with a parameter of power delivered to one of the main generator portion armature phase windings.
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Citations
31 Claims
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1. A detector for detecting rotor position of a brushless generator having a motive power shaft, a permanent magnet generator (PMG) coupled to the shaft, the PMG having a set of armature phase windings at which a set of PMG phase outputs are produced, and a main generator portion coupled to the shaft, the main generator portion having a set of armature phase windings capable of receiving AC power, comprising:
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means coupled to the PMG armature phase windings for deriving a number of internal pulses per revolution of the motive power shaft from the PMG phase outputs; means coupled to the deriving means for measuring time periods between adjacent interval pulses; and means coupled to the measuring means for converting the measured time periods into an indication of the angular position of the motive power shaft.
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2. A detector for detecting rotor position of a brushless generator having a motive power shaft, a permanent magnet generator (PMG) coupled to the shaft, the PMG having a set of armature phase windings at which a set of PMG phase outputs are produced, and a main generator portion coupled to the shaft, the main generator portion having a set of armature phase windings capable of receiving AC power, comprising:
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means coupled to the PMG armature phase windings for deriving a number of internal pulses per revolution of the motive power shaft from the PMG phase outputs; means coupled to the deriving means for measuring time periods between adjacent interval pulses; means coupled to the measuring means for converting the measured time periods into an indication of the angular position of the motive power shaft; and wherein the measuring means comprises a counter which accumulates clock pulses during time periods between adjacent interval pulses. - View Dependent Claims (3, 4, 5, 6)
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7. A starting system control for operating a brushless generator in a starting mode to convert electrical power into motive power wherein the brushless generator includes a motive power shaft, a permanent magnet generator (PMG) having a set of armature phase windings at which a set of PMG phase outputs are produced and a main generator portion having a set of armature phase windings which receive AC power during operation in the starting mode, comprising:
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means coupled to the PMG armature phase windings for deriving a number of interval pulses per revolution of the motive power shaft from the PMG phase outputs; means coupled to the deriving means for measuring time periods between adjacent interval pulses; means coupled to the measuring means for converting the measured time periods into indications of the speed and angular position of the motive power shaft; and means coupled to the converting means for delivering AC power to the set of main generator portion armature phase windings in dependence upon the speed and angular position indications. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of detecting rotor position of a brushless generator having a motive power shaft, a permanent magnet generator (PMG) having a set of armature phase windings at which a set of PMG phase outputs are produced and a main generator portion having a set of armature phase windings capable of receiving AC power and coupled to an exciter portion, the method comprising the steps of:
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deriving a number of interval pulses per revolution of the motive power shaft from the PMG phase outputs; measuring time periods between adjacent interval pulses; deriving a reset signal from a parameter of AC power on one of the main generator portion armature phase windings; and converting the measured time periods into an indication of the angular position of the motive power shaft in accordance with the reset signal. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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Specification