GR871975B - Variable speed electric machine having controlled magnetic flux density - Google Patents

Abstract

In a polyphase machine, either motor or generator, we place a stator's core, which has the stator's main winding around the stator's core and also the main windings, which have a condenser on line with each winding of the core. For each winding there are switches and a signaling source for the proper function of the switches in accordance with the condenser and the windings aiming at the secure function of the sequential power flow in opposite directions along the windings. Pulses of changeable frequency coming from a signaling order create a changeable-speed machine. With the control windings placed around the stator in an opposite direction from the main windings, we have the creation of electric powers in each phase, where the powers have no load and they function in relation to the corresponding powers of the windings that are located in a close radiate distance. These electric powers are created out of phase with the powers of the main windings when the load increases. When the load is small, the clean flux density is small and as the load increase, there is an increase in the flux density as well. The magnetic centre of the poles is improved when the cores of the poles of the control windings are placed as physically close as possible to the poles of the main windings. The voltage along the condenser that is added to the input voltage is possible to periodically connect the stator's core with replete and non replete situations.