Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Running-speed control
Patent
1997-11-20
2000-06-27
Masih, Karen
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Running-speed control
318439, 318807, 318782, 318138, 318254, 318812, 318456, 318479, 318504, H02P 550
Patent
active
060810807
ABSTRACT:
A method and apparatus for reducing winding failures in electric machines resulting from the application of high frequency or high dV/dt voltage pulses or voltage signals to the phase windings of the machine in which an inductive element is provided between the source of the high-frequency or high dV/dt pulses and the phase winding to absorb a portion of the voltage stresses on the phase windings that result from the application of the high-frequency or high dV/dt pulses to the machine.
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Y. Murai, et al., "Protection of Motor from Switching Surge by Vacuum Switch," IEEE Transactions on Power Apparatus and Systems, vol. PAS-93, No. 5, Sep./Oct. 1974, pp. 1472-1477.
Rhode Nelson and Gary Skibinski, Allen Bradley Co., Inc., Solutions To Motor Insulation Failures, Power Transmission Design, Aug. 1995.
Potoradi et al., Transient Overvoltages Caused by Switching of High Voltage Asynchronous Machines and their Distribution in Stator Windings, Sep. 5-8 1994, pp. 649-; vol. 2, Proc. Int. Conf. on Electrical Machines, Paris.
Bonnett, A., Analysis of the Impact of Pulse-Width Modulated Inverter Voltage Waveforms on A.C. Induction Motors, U.S. Electrical Motors Division of Emerson Electric.
Takahashi et al., Motor Lead Length Issues for IGBT PWM Drives, Conf. Record of 1995 IEEE Annual Pulp and Paper Technical Conference, IEEE Cat No. 95CH3572-5, pp. 21-27.
Cornick & Thompson, Steep-fronted Switching Voltage Transients and their distribution in motor windings Part 1: System Measurements of steep-fronted switching voltage transients; Part II: Distribution of steep-fronted switching voltage transients in motor windings, Mar. 1982, pp. 45-63, IEEE Proc. vol. 129, Pt.B. No. 2.
Masih Karen
Switched Reluctance Drives Ltd.
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