Abstract: An electromotive machine (200, 900) comprises a rotor (230; 800; 920) and a stator (210, 220; 500; 600; 700; 910, 920). The stator (210, 220; 500; 600; 700; 910, 920) comprises a first group of primary windings (260a, 240b, 240d; 520; 640a, 640b, 650a, 650b, 660a, 660b; 930a, 930b, 933a, 933b, 937a, 937b), which are concentrated windings, arranged on a first side of the rotor (230; 800; 920) and a second group of primary windings (240a, 250a, 240c; 530; 740a, 740b, 750a, 750b, 760a, 760b; 941a, 941b, 943a, 943b, 947a, 947b) that are concentrated windings arranged on a second, opposite, side of the rotor (230; 800; 920). The primary windings of each group comprise a plurality of coils that, in use, are supplied with current and produce a magnetic field.

Abstract: An electromotive machine (200, 900) comprises a rotor (230; 800; 920) and a stator (210, 220; 500; 600; 700; 910, 920). The stator (210, 220; 500; 600; 700; 910, 920) comprises a first group of primary windings (260a, 240b, 240d; 520; 640a, 640b, 650a, 650b, 660a, 660b; 930a, 930b, 933a, 933b, 937a, 937b), which are concentrated windings, arranged on a first side of the rotor (230; 800; 920) and a second group of primary windings (240a, 250a, 240c; 530; 740a, 740b, 750a, 750b, 760a, 760b; 941a, 941b, 943a, 943b, 947a, 947b) that are concentrated windings arranged on a second, opposite, side of the rotor (230; 800; 920). The primary windings of each group comprise a plurality of coils that, in use, are supplied with current and produce a magnetic field.

Abstract: An electromotive machine (200) comprises a stator (210), comprising a plurality of primary windings (215; 500; 520; 540), and a rotor (220). The primary windings (215; 500; 520; 540) are concentrated windings. The rotor (220) comprises secondary windings (230; 300; 400).

Abstract: Interventional MRI imaging leads to the development of open magnets such as for example C-magnet 1, in which it is correspondingly more difficult to generate a large field in order to obtain a good signal-to-noise ratio. To overcome this, a pre-polarizing unit 7 is provided which utilizes a HTSC magnet, for example of YBCO, which is brought adjacent to the patient to assist in generating the main field, and then rapidly withdrawn to position 8, in order to enable the r.f. signals to be detected in the presence of the field of the C-magnet 1.

Abstract: In a combined linear motor and levitation arrangement, the primary comprises two longitudinally extending rows of transverse U-cores disposed side by side. The secondary comprises electrically conductive non-magnetic material backed by magnetic material. The magnetic material of the secondary is formed in two parts each of which is associated with a respective row of U-cores of the primary.

Abstract: A linear induction motor primary has the winding conductors on at least part of its working face arranged in two nonparallel groups of mutually parallel conductors. All the windings on the working face, including end windings and cross over windings, are closely coupled to the magnetic material of the core of the primary.