Abstract: The invention relates to the construction and a mode of operation of statorless electronically switched DC motors that have two freely turning rotors. The invention also relates to embodiments of the invention regarding the bearings, the circuit design and the mode of operation of machines such as fans and blowers.

Abstract: The present invention provides principles and circuits for the power control of two-phase switched reluctance machines featuring a direct recovery of the phase switch-off energy and a 180° phase angle at full load. The power control method of the present invention does not require any supplementary power switches and acts through the logic circuitry upon the existing power switches of a motor which formerly did not exhibit a power control. The power control relies physically on a shorter current flow or duty cycle after the phase beginning. This can be done either through mechanical phase shift of a second Hall sensor or by using time delay circuits.

Abstract: A field part of an electronically switched two-phase reluctance machine includes a plurality of individually wound U-shaped yoke assemblies. Each assembly includes winding carrying U-shaped magnets attached to a non-magnetic carrier frame. Each yoke assembly has winding connections which are interconnected by a form-defined, axially mountable electric conductor compound. Power conducting electric components are electrically connected to the electric connector compound as well.

Abstract: The invention relates to the construction and a mode of operation of statorless electronically switched DC motors that have two freely turning rotors. The invention also relates to embodiments of the invention regarding the bearings, the circuit design and the mode of operation of machines such as fans and blowers.

Abstract: This switched reluctance machine has at least six magnet yokes (11) on the stator side. The yokes are placed circularly and they carry windings (112). These yokes (11) can be placed at the inner side and/or the outer side of the rotor (12). These yokes which are magnetically insulated to each other interact with the salient poles (121) of the rotor (12). The two phases (X, Y) of this machine are push-pull controlled by a Hall sensor (31). This way the electronic circuitry becomes very simple.

Abstract: This motor has a special magnetic circuit which enables it to be powered by a very simple electronic circuitry. This motor has, according to the figure, four U-shaped Yokes (11, 112) with eight unevenly spaced poles (111) surrounding a rotating six-pole rotor (12). The motor is driven by two power semiconductor devices (21) controlled from a Hall sensor (31). The demagnetising energy being set free by switching off the main windings (112X) will be directed through the coupling diodes (22) as premagnetising energy to the secondary windings (113Y) of the following phase (Y). This motor with high speed capability which is inexpensive, simple and quietly running can be mainly used for pumps, fans and blowers for gases and fluids.