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Electric machine (10) which can be operated as a motor or generator, with a rotor (26a, 26b) rotatably mounted in a housing (12), a rotor shaft (24) which extends beyond the housing (12) and a plurality of electromagnet components (28) which are statically disposed in the housing at uniform angular

Electric machine (10) which can be operated as a motor or generator, with a rotor (26a, 26b) rotatably mounted in a housing (12), a rotor shaft (24) which extends beyond the housing (12) and a plurality of electromagnet components (28) which are statically disposed in the housing at uniform angular spacings and spaced from the axis of rotation of the rotor, each with a coil core (32) bearing a coil winding (30) consisting of one or more conductors. The pole faces of the end faces of the coil cores (32) are aligned with pole faces of permanent magnets (27) which are retained non-rotatably in or on the rotor and each have a polarity which is successively reversed in the peripheral direction. The coil cores (32) of the electromagnet components (28) are disposed parallel to the axis of rotation of the rotor shaft in the interior of the housing in such a way that their opposing end faces each lie in two planes which are spaced from one another and extend at right angles to the axis of rotation of the rotor shaft The ends of the electric conductors which form the coil winding (30) of the individual electromagnet components (28) are interconnected via an electric or electronic control device to form at least two pairs of electrical connections.

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Electric machine (10) which can be operated as a motor or generator, with a rotor (26a, 26b) rotatably mounted in a housing (12), a rotor shaft (24) which extends beyond the housing (12) and a plurality of electromagnet components (28) which are statically disposed in the housing at uniform angular

Electric machine (10) which can be operated as a motor or generator, with a rotor (26a, 26b) rotatably mounted in a housing (12), a rotor shaft (24) which extends beyond the housing (12) and a plurality of electromagnet components (28) which are statically disposed in the housing at uniform angular spacings and spaced from the axis of rotation of the rotor, each with a coil core (32) bearing a coil winding (30) consisting of one or more conductors. The pole faces of the end faces of the coil cores (32) are aligned with pole faces of permanent magnets (27) which are retained non-rotatably in or on the rotor and each have a polarity which is successively reversed in the peripheral direction. The coil cores (32) of the electromagnet components (28) are disposed parallel to the axis of rotation of the rotor shaft in the interior of the housing in such a way that their opposing end faces each lie in two planes which are spaced from one another and extend at right angles to the axis of rotation of the rotor shaft The ends of the electric conductors which form the coil winding (30) of the individual electromagnet components (28) are interconnected via an electric or electronic control device to form at least two pairs of electrical connections. coustical Noise from Switched Reluctance Drives in Current and Voltage Control," Sep. 5-7, 1994, Proc. ICEM '94, pp. 589-594. Frede Blaabjerg and John K. Pedersen, "Digital Implemented Random Modulation Strategies for AC and Switched Reluctance Drives," Proceedings of the IECON'93, pp. 676-682, International Conference Industrial Conference on Industrial Electronics, Control and Instrumentation, Maui, Hawaii, Nov. 15-19, 1993. Mehdi Moallem et al., "Effect of Rotor Profiles on the Torque of a Switched-Reluctance Motor", IEEE Transactions on Industry Applications, vol. 28, No. 2, Mar./Apr. 1992, ppgs. 364-369. Richard S. Wallace and David G. Taylor, "A Balanced Commutator for Switched Reluctance Motors to Reduce Torque Ripple," IEEE Transactions on Power Electronics, vol. 7, No. 4, pp. 617-626, Oct. 1992. Richard S. Wallace and David G. Taylor, "Low-Torque-RippleSwitched Reluctance Motors for Direct-Drive Robotics," IEEE Transactions on Robotics and Automation, vol. 7, No. 6, pp. 733-742, Dec. 1991. Richard S. Wallace, Jr., "Design and Control of Switched Reluctance Motors to Reduce Torque Ripple," Georgia Institute of Technology, Nov. 1990. S. Chan et al., "Performance Enhancement of Single-Phase Switched-ReluctanceMotor by DC Link Voltage Boosting," Sep. 1993, IEEE Proceedings-B, vol. 140, pp. 316-322. Shi-Ping Hsu et al., "Modeling and Analysis of Switching DC-to-DC Converters in Constant-Frequency Current-ProgrammedMode," 1979, IEEE Power Electronics Specialists Conference, pp. 284-301. Stephenson and Blake, "The Characteristics, Design and Applications of Switched Reluctance Motors and Drives," PCIM Conference & Exhibition, Jun. 21-24, 1993, Nuremberg, Germany. International Search Report for PCT/US01/30441. D. E. Cameron et al., "The Origin and Reduction of Acoustic Noise in Doubly Salient Variable-Reluctance Motors," Nov./Dec. 1992, IEEE Transactions on Industry Applications, vol. 28 No. 6, pp. 1250-1255. Patent Abstracts of Japan vol. 1999, No. 12, Oct. 29, 1999 and JP 11 178298 A (Toshiba Corp), Jul. 2, 1999 abstract, Figure 8.