Abstract: An electrical machine system with mechanically and electrically coupled sub-machines, which have common magnetic sections and common coils and are connected by way of mechanical transmission systems, wherein adjacent sub-machines have mutually opposed directions of rotation with equal rotational speeds, and the mechanical coupling is specified by a transmission functionality, which at the same time defines the transmission ratio of rotor speed to transmission output drive rotational speed.

Abstract: An electrical machine system with mechanically and electrically coupled sub-machines, which have common magnetic sections and common coils and are connected by way of mechanical transmission systems, wherein adjacent sub-machines have mutually opposed directions of rotation with equal rotational speeds, and the mechanical coupling is specified by a transmission functionality, which at the same time defines the transmission ratio of rotor speed to transmission output drive rotational speed.

Abstract: A method is provided for regulating a three-phase machine functioning under any operational conditions without a mechanical rotary transducer. The machine is supplied with D.C. power by an inverter, where parameters of a D.C. link using an actual switching state of the inverter are detected for regulation. The method includes measuring (1) flow direction required for field-oriented control in asynchronous machines, and (2) rotor position for rotor-oriented control in synchronous machines. The measuring is performed by using spatial magnetic conductivity fluctuations in the machine. The conductivity fluctuations are detected using parameters for a D.C. link. An actual switching state of an inverter is used in the measuring process. Mathematical evaluation to calculate flow direction or rotor direction is then performed.

Abstract: Electric rotary current machine that includes a casing and a stator fitted within the casing. The stator has at least one stator winding. At least two mechanically separate rotors are rotatably mountable within the casing and have a same axis of rotation. In this way, each rotor has electromagnetic interaction with the stator when the stator is electromagnetically active. The rotor speeds are the same or different. A motor control is arranged to control a supply to at least one of said at least one stator winding by superposition of at least two rotary field components, one for each rotor.

Abstract: Method and apparatus for accurately determining electromagnetic and mechanical information from electrodynamic rotary field machines, such as, for example, asynchronous, synchronous or reluctance machines that utilize voltage discontinuities generated by an associated inverter. The apparatus according to the present invention obtains information from machines running at a low rpm without using a mechanical transducer, as well as with machines running at a high rpm.