Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2008-04-15
2008-04-15
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S801000, C318S805000, C388S917000
Reexamination Certificate
active
07358700
ABSTRACT:
An induction motor controller that may include three phase paths leading from a power input to a power output, a solid-state switching device interposed between the power input and the power output on each of the three phase paths, a voltage sensor coupled to two of the phase paths between the solid-state switching device and the power output, a current sensor on one of the phase paths, a processor communicatively coupled to the voltage sensor, the current sensor, and the solid state switching device; and a memory coupled to the processor. The processor may be configured to calculate a motor parameter based on a signal from the voltage sensor and a signal from the current sensor and store the calculated motor parameter in memory.
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Stephen J. Chapman, “Electric Machinery Fundamentals”, Third Edition, McGraw-Hill Publishing, New York, 1999. Appendix A explains a three-phase circuit. Specifically, pp. 652-659 explains the relationship of phase quantity and line quantity between a delta-circuit configuration and a Y-circuit configuration.
Lu Haihui
Nondahl Thomas A.
Qian Wei
Kuszewski Alexander R.
Ro Bentsu
Rockwell Automation Technologies Inc.
Yoder Patrick S.
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