Electricity: motive power systems – Plural diverse motor controls – Running-speed control
Reexamination Certificate
2006-10-26
2008-08-26
Masih, Karen (Department: 2837)
Electricity: motive power systems
Plural diverse motor controls
Running-speed control
C318S599000, C318S779000, C318S400340
Reexamination Certificate
active
07417389
ABSTRACT:
A system and method for controlling a rotational speed associated with a shaft or rotor of an electric motor comprises establishing a target rotational speed associated with a shaft or rotor of an electric motor. A sensor detects an actual rotational speed associated with the shaft or rotor of an electric motor. Speed error data is determined. The speed error defined as a difference between the target rotational speed and the actual rotational speed. A first duty cycle factor is determined based on the speed error data and a first gain constant. A second duty cycle factor is determined based on the speed error data and a second gain constant. Duty cycle input data is calculated for the electric motor based on a sum of the first duty cycle factor, the second duty cycle factor, and the target speed.
REFERENCES:
patent: 5199637 (1993-04-01), Adams
patent: 6236179 (2001-05-01), Lawler et al.
Jahmeerbacus, M.I., et al. A Dual-Stage PWM DC to AC Inverter with Reduced Harmonic Distorsion and Switching Losses. Science and Technology-Research Journal, 2000, vol. 5, pp. 80-91 [online]. University of Mauritius, Reduit, Mauritius. [retrieved Oct. 27, 2006]. Retreived from the Internet: <URL: http://www.uom.ac.mu/Research&Consultancy/UOM—JORN/Science%20&%20Technology%20Vol%205/jahmeebacus%20vol%205.pdf>.
Pichler, P. et al. Demand-based Induction Motor Design for Diverging Electrical Vehicle Applications Powered by Battery. Department of Electrical Engineering, University of Leoben, Austria. [online]. [retrieved Oct. 27, 2006]. Retrieved from the Internet: <URL: http://www.ansoft.com
ews/articles/Induction—Motor—Design—for—Electric—Vehicles.pdf>.
Deere & Company
Masih Karen
LandOfFree
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