Torque generation for salient-pole synchronous machine for start-up of a prime mover
First Claim
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1. A method of starting and operating a prime mover to improve power electronics utilization, said method comprising:
- controlling a kVA utilization plural phase inverter to provide a voltage signal to an armature winding of a starter/generator, said voltage signal having a terminal voltage Park vector and a current Park vector, said current Park vector comprising a q-axis and a d-axis current vector component;
controlling said terminal voltage Park vector to adjust an angle value between said terminal voltage Park vector and said armature current Park vector, wherein said armature current is provided a d-axis current vector component to reduce a saturation level of said d-axis; and
wherein at least a first angle value is provided by controlling said terminal voltage Park vector to be substantially in-phase with said current vector component of said armature current Park vector while reducing said saturation level of said d-axis to improve power electronics utilization provided by said starter/generator.
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Abstract
A system and method to provide an improved power electronics starting system (100) in which starting torque is delivered by a salient pole synchronous machine (102), while associated power electronics (110) and (118) utilization is maximized by adjusting the Park vector of the armature (102A) phase current to remain in-phase with the Park vector of the armature (102A) terminal voltage, regardless of the level of saturation of the pole synchronous machine (102).
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Citations
12 Claims
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1. A method of starting and operating a prime mover to improve power electronics utilization, said method comprising:
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controlling a kVA utilization plural phase inverter to provide a voltage signal to an armature winding of a starter/generator, said voltage signal having a terminal voltage Park vector and a current Park vector, said current Park vector comprising a q-axis and a d-axis current vector component;
controlling said terminal voltage Park vector to adjust an angle value between said terminal voltage Park vector and said armature current Park vector, wherein said armature current is provided a d-axis current vector component to reduce a saturation level of said d-axis; and
wherein at least a first angle value is provided by controlling said terminal voltage Park vector to be substantially in-phase with said current vector component of said armature current Park vector while reducing said saturation level of said d-axis to improve power electronics utilization provided by said starter/generator. - View Dependent Claims (2, 3, 4, 9, 10)
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5. An apparatus for starting and operating a prime mover, such as a starter/generator having an armature and field winding, to improve power electronics utilization, comprising:
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a plural phase inverter electrically coupled to a starter/generator to provide a voltage signal to said armature winding of said starter/generator, said voltage signal having a terminal voltage Park vector and a current Park vector, said current Park vector comprising a q-axis and a d-axis current vector component; and
said plural phase inverter having a utilization control mode to adjust an angle value between said terminal voltage Park vector and said armature current Park vector, wherein said armature current is provided a d-axis current vector component to reduce a saturation level of said d-axis;
wherein at least a first angle value is provided by controlling said terminal voltage Park vector to be substantially in-phase with said current vector component of said armature current Park vector while reducing said saturation level of said d-axis to improve power electronics utilization provided by said starter/generator. - View Dependent Claims (6, 7, 8, 11, 12)
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Specification