Rotor position detector
First Claim
1. 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, comprising:
- a shaft pulse encoder disposed on the motive power shaft which develops a cycle pulse once per revolution of the motive power shaft;
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 and responsive to the cycle pulse 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 windings in dependence upon the speed and angular position indications wherein the delivering means comprises;
second developing means for developing a torque command signal and an electrical angle command signal from the speed and angular position indications; and
an inverter responsive to the torque command signal and the electrical angle command signal which develops the AC power.
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Accused Products
Abstract
A detector for detecting rotor position of a brushless generator includes a shaft pulse encoder which develops a cycle pulse once per revolution of a motive power shaft and a circuit coupled to armature phase windings of a permanent magnet generator of the brushless generator 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.
166 Citations
12 Claims
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1. 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, comprising:
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a shaft pulse encoder disposed on the motive power shaft which develops a cycle pulse once per revolution of the motive power shaft; 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 and responsive to the cycle pulse 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 windings in dependence upon the speed and angular position indications wherein the delivering means comprises; second developing means for developing a torque command signal and an electrical angle command signal from the speed and angular position indications; and an inverter responsive to the torque command signal and the electrical angle command signal which develops the AC power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification