A permanent magnet direct current electric motor including a stator core, a stator winding for a stator core, and a magnetic rotor rotatably mounted inside the stator, in which the stator core comprises a closely wound helical coil of ferromagnetic wire, and in which the stator winding is positioned between the stator core and the rotor.

An electrical machine has a rotor shaft which carries a plurality of rotor discs for rotation therewith. Each rotor disc has two pairs of rotor rims secured thereto. Each rotor rim consists of a single row of alternate magnets and pole pieces and is opposed by a series of stator cores which straddle the rotor rim. The stator cores are `c` shaped so that they receive flux from two adjacent magnets and close around two opposite rotor poles on either side of the rotor rim. The stator cores, formed ...

A device such as an electric motor, an electric generator, and a regenerative electric motor includes a plurality of independent energizable electromagnetic assemblies. Each independent electromagnetic assembly has an associated one-piece magnetic core formed from thin film soft magnetic material. Each independent electromagnetic assembly defines two stator poles located at opposite ends of the one-piece magnetic core. Each one-piece magnetic core provides the entire magnetic return path for the...

The invention concerns a stator for a line-start electric motor, with a rotor accommodating chamber, in which a rotor is accommodated to be rotatable, and which has accommodating chambers for conducting rods and accommodating chambers for permanent magnets, and with a stator winding comprising several windings, which, during operation of the line-start electric motor under the influence of the rotor, generate a magnetic field with a main axis. In order to increase the efficiency of the line-star...

An electric rotating machine includes a stator with a stator core formed of a plurality of stator steel sheets with corner portions having through bolt holes for receiving through bolts therein, and a rotor. A frame receives the stator with end brackets being fixed on ends of the stator by through bolts inserted into the through bolt holes thereof. Each of the end brackets includes bolt holes corresponding to the through bolt holes formed on the stator steel sheets and bolt holes for at least at...

A modular stator for use in an electric motor. The modular stator includes a plurality of stator sections and a plurality of connectors. The plurality of stator sections have conductors extending therethrough with exposed terminal ends. The connectors have corresponding conductive elements with receptacles for receiving the terminal ends. Thus, a given stator may be assembled to a variety of desired lengths by connecting the appropriate number of modular components.

A method for making a motor and auxiliary devices with a unified stator body comprises providing a piece of material (10) having an area larger than a cross section of the stator (11), removing material from the piece of material (10) to form a pattern for a cross section of a core (11) for the stator, and removing material from the piece of material (10) outside the cross section of the core of the stator (11) to allow positioning of cores (22, 23, 24) for supporting windings (25, 26, 27) of le...

A device such as an electric motor, an electric generator, and a regenerative electric motor includes a plurality of independent energizable electromagnetic assemblies. Each independent electromagnetic assembly has an associated one-piece magnetic core formed from thin film soft magnetic material. Each independent electromagnetic assembly defines two stator poles located at opposite ends of the one-piece magnetic core. Each one-piece magnetic core provides the entire magnetic return path for the...

A rotary electric motor in which rotor and stator members are each configured as annular rings, concentric with respect to each other, about an axis of rotation. Either of the rotor or stator members is formed of groups of electromagnet poles, the groups substantially equidistantly distributed along the angular extent of the annular ring, each of the groups comprising magnetic material magnetically isolated and separated from the other groups. The other member comprises a plurality of permanent ...

A recording disk drive motor is disclosed which is employed in a recording disk drive that retains a removable recording disk that has a diameter of 30 mm or less, as well as a method of manufacturing a stator core used in the same. The core back of the stator core in the motor has an arc shaped inner circumferential surface therein that is offset from the center thereof. The stator core is produced from a laminated body having a stator core, a chuck frame that is integral with and surrounds the...