System and method for AC power generation from a reluctance machine
First Claim
1. A method of reluctance power production using a synchronous reluctance machine, said method comprising the steps of:
- coupling a prime mover with a synchronous reluctance machine, wherein said synchronous reluctance machine is electrically coupled with a power converter and driven by said prime mover;
measuring at least one of a DC link voltage for comparison with a commanded DC link voltage Vdc,com, an AC capacitor voltage for comparison with a commanded AC capacitor voltage vcap, and an AC inductor current; and
generating reluctance power by reason of different magnetic reluctance between direct and quadrature axes of the driven synchronous reluctance machine and the control of said power converter using said measured DC link voltage, AC capacitor voltage and AC inductor current;
said method further comprising the steps of;
where said synchronous machine comprises a salient-pole synchronous machine, monitoring a main field flux in said salient-pole synchronous reluctance machine to detect a loss of rotor field;
monitoring said prime mover engaged with said salient-pole synchronous machine to detect machine rotor rotation; and
controlling said power converter to generate reluctance power from said salient-pole synchronous machine when there is a loss of rotor field and machine rotor rotation is detected.
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Accused Products
Abstract
A system and method is provided for generating AC power using a synchronous reluctance machine (12) or a salient-pole synchronous machine (102) and a power converter (110). The present invention can be used to achieve power production for a synchronous reluctance machine (12), or can be used to achieve AC power from a traditional salient-pole synchronous machine/starter (102) without dependence upon a rotor current which is subject to failure. In the power generation system, the control system and method can include a power converter (110), controlled by a voltage command and at least one of a measured AC bus (125) current and voltage, and a DC link (120) voltage, for use with a synchronous reluctance machine (102) and a prime mover (116), such that movement of the rotor of the synchronous reluctance machine (102) can be used to produce at least partial AC power generation on the AC bus (125).
40 Citations
11 Claims
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1. A method of reluctance power production using a synchronous reluctance machine, said method comprising the steps of:
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coupling a prime mover with a synchronous reluctance machine, wherein said synchronous reluctance machine is electrically coupled with a power converter and driven by said prime mover; measuring at least one of a DC link voltage for comparison with a commanded DC link voltage Vdc,com, an AC capacitor voltage for comparison with a commanded AC capacitor voltage vcap, and an AC inductor current; and generating reluctance power by reason of different magnetic reluctance between direct and quadrature axes of the driven synchronous reluctance machine and the control of said power converter using said measured DC link voltage, AC capacitor voltage and AC inductor current;
said method further comprising the steps of;
where said synchronous machine comprises a salient-pole synchronous machine, monitoring a main field flux in said salient-pole synchronous reluctance machine to detect a loss of rotor field;
monitoring said prime mover engaged with said salient-pole synchronous machine to detect machine rotor rotation; and
controlling said power converter to generate reluctance power from said salient-pole synchronous machine when there is a loss of rotor field and machine rotor rotation is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of reluctance power production using a synchronous reluctance machine, said method comprising the steps of:
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measuring an AC voltage and AC current of an AC bus between a synchronous reluctance machine and a converter for comparison with a commanded AC voltage value vcap to form a voltage command Park vector in synchronous reference frame; measuring a DC link voltage of said converter for comparison with a commanded DC link voltage value Vdc,com, and a rotor position of said synchronous reluctance machine, to transform said voltage command Park vector in synchronous reference frame to stationary reference frame; and driving said converter using said voltage command Park vector in stationary reference frame to obtain an AC voltage on said AC bus. - View Dependent Claims (10, 11)
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Specification