Electricity: motive power systems – Synchronous motor systems – Armature winding circuits
Patent
1985-07-09
1986-02-25
Smith, Jr., David
Electricity: motive power systems
Synchronous motor systems
Armature winding circuits
318138, 318254, 310269, 310264, H02P 540, H02K 318
Patent
active
045730032
ABSTRACT:
An electrical machine is disclosed, capable of functioning as either a motor or generator, which has a salient pole rotor (23) and a stator having multiple phase windings (21) each comprising a concentrated, full pitch winding with one stator slot per pole per phase. The pole faces (27) of the salient poles of the rotor may be tapered to produce an air gap which increases from the front to the back of the pole face to counter the effect of armature reaction MMF. The taper of the pole faces is selected such that the resultant total flux density in the air gap from field and armature currents is quasi-rectangular. The quasi-rectangular flux densities rotating in the air gap produce quasi-rectangular phase voltages and currents when the machine is operated as a generator, and, when operated as a motor, the machine is adapted to accept quasi-rectangular supply currents or voltages of the type readily produced by variable frequency converter power supplies.
REFERENCES:
patent: 1334831 (1920-03-01), Bergman
patent: 1401996 (1922-01-01), Lundell
patent: 2235075 (1941-03-01), Kimball
patent: 2394075 (1946-02-01), Kimball
patent: 2449506 (1948-09-01), Pollard
patent: 3215875 (1965-11-01), Latta
patent: 3495106 (1970-02-01), Lenders
patent: 3634707 (1972-01-01), Tillner et al.
patent: 3780324 (1973-12-01), Greenwell
patent: 3873897 (1975-03-01), Muller
patent: 3956678 (1976-05-01), Byrne et al.
patent: 4309643 (1982-01-01), Acamatsu
patent: 4398134 (1983-08-01), Muller
Rosenberg, R., Electric Motor Repair, Holt, Rinehart & Winston, 1970, pp. 100-107, 113-115.
F. W. Maxstadt, "Obtaining Steady High-Voltage Direct Current from a Thermionic Rectifier without a Filter," Trans. AIEE, vol. 43, Nov. 1924, pp. 1055-1057.
M. Stohr, "The Rated Output of Commutatorless Inverter Motors having a Simple Six-Phase Connection," Archiv. fur Elektrotechnik, vol. 32, 1938, pp. 691-720.
M. Stohr, "The Rating of Brushless Converter Motors with Improved Motor Connections," Archiv. fur Elektrotechnik, vol. 32, 1938, pp. 767-784.
W. Leitgeb, "The Unit Capacity of Converter-Fed Synchronous Machines in Connection with Various Number of Phases and Types of Circuits," Archiv. fur Elektrotechnik, vol. 57, Jun. 1975, pp. 71-84.
Smith Jr. David
Wisconsin Alumni Research Foundation
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