Abstract:
In a resonant motor system, an electrical motor 10 having a stator 14 with one or more windings, a rotor 12 which may or may not be wound, and an air gap 16 between the stator 14 and the rotor 12 for storing magnetic energy such that the motor 10 exhibits a definite electrical inductance deployed with a drive combination including a compacitance connected in series with the inductance of the motor 10 to form an LCR circuit therewith. Phased provision of DC power to the LCR circuit causes the circuit to oscillate, which excites the motor 10. The DC power is provided in synchronism with the rotation of the rotor 12 in order to maximize the torque produced by the motor 10.
Abstract:
In accordance with the teachings described herein, a DC homopolar machine is provided. The DC homopolar machine may include a stator having a stator magnetic core and a permanent' magnet, a rotor magnetic core supported within the stator to rotate relative to the stator, and non-magnetic material within a gap between the rotor magnetic core and the stator magnetic core. The stator, rotor and non-magnetic material form a magnetic circuit having a total reluctance, the total reluctance of the magnetic circuit being provided by a first reluctance of the permanent magnet and a second reluctance of the gap of non-magnetic material, with the first reluctance being substantially equal to the second reluctance.
Abstract:
A system for providing electrical contact in a machine (Figure 1) including a pump (24) for pumping charged molten metal (16) through a nozzle (14) to the rotating ring (20) in order to transfer electric current from the power source (18) to the current collector ring (20).