System and method for robust sensorless control of permanent magnet assisted synchronous reluctance (PM-SyR) motor. The system and method includes startup control of a motor with known rotor position/speed, but unknown rotor magnetic polarity of a motor exhibiting rotor magnetic anisotropy or saliency. The system and method includes a rotor characteristic detection method for a PM-SyR motor that detects rotor magnetic polarity based on the variation of the inductance that is caused by the leakage flux paths in the rotor barrier bridges and utilizes the detected rotor magnetic polarity for improved motor startup.

An energy conserving power generator has a frame, a transmitting device, and a power generating device. The transmitting device and the power generating device are disposed in the frame. The power generating device has a coil disposing board, multiple coil seats, multiple coils, a conductor, multiple rotating shafts, and multiple rotating magnets. The coil disposing board is fixed on the frame. The multiple coil seats are disposed at spaced intervals on the coil disposing board. Each one of the multiple coils is winded around a respective one of the multiple coil seats. The conductor is fixed on the transmitting shaft. Each one of the multiple rotating shafts passes through the coil disposing board. Each one of the multiple rotating magnets is mounted to a respective one of the multiple rotating shafts, is adjacent to the conductor, and extends into two of the multiple coils winded around two corresponding coil seats.

An energy conserving power generator has a frame, a transmitting device, and a power generating device. The transmitting device and the power generating device are disposed in the frame. The power generating device has a coil disposing board, multiple coil seats, multiple coils, a conductor, multiple rotating shafts, and multiple rotating magnets. The coil disposing board is fixed on the frame. The multiple coil seats are disposed at spaced intervals on the coil disposing board. Each one of the multiple coils is winded around a respective one of the multiple coil seats. The conductor is fixed on the transmitting shaft. Each one of the multiple rotating shafts passes through the coil disposing board. Each one of the multiple rotating magnets is mounted to a respective one of the multiple rotating shafts, is adjacent to the conductor, and extends into two of the multiple coils winded around two corresponding coil seats.

A permanent magnet-type rotary electric machine includes a stator, a first rotor, and a second rotor. The stator includes a stator core, a plurality of stator teeth, a plurality of stator slots, a plurality of stator magnets, and a stator coil. The first rotor is disposed inside the stator core relative to the plurality of stator magnets. The second rotor is disposed inside the stator core relative to a plurality of first pole pieces. The second rotor includes a plurality of second pole pieces. A proportion of the number of the plurality of stator slots to the number of poles of the plurality of second pole pieces of the second rotor is greater than 1.25 and less than 1.5, or greater than 1.5 and less than 3.0.

An electric motor includes a rotor and a stator including a stator core, a plurality of armature windings, a plurality of field windings, and a plurality of bonded magnets. The stator core has a plurality of teeth alternately defining field slots and armature slots along a circumferential direction, and a stator yoke magnetically coupling the plurality of teeth opposite the rotor. Each armature winding is wound around two of the teeth sandwiched between an adjacent pair of the armature slots. Each field winding is wound around two of the teeth sandwiched between an adjacent pair of the field slots. The magnets are individually located in the field slots while opposing the field windings in the radial direction. Each adjacent pair of the magnets along the circumferential direction respectively has an adjacent pair of pole surfaces, with the adjacent pair of pole surfaces having a same polarity.

An electric motor includes a rotor and a stator including a stator core, a plurality of armature windings, a plurality of field windings, and a plurality of bonded magnets. The stator core has a plurality of teeth alternately defining field slots and armature slots along a circumferential direction, and a stator yoke magnetically coupling the plurality of teeth opposite the rotor. Each armature winding is wound around two of the teeth sandwiched between an adjacent pair of the armature slots. Each field winding is wound around two of the teeth sandwiched between an adjacent pair of the field slots. The magnets are individually located in the field slots while opposing the field windings in the radial direction. Each adjacent pair of the magnets along the circumferential direction respectively has an adjacent pair of pole surfaces, with the adjacent pair of pole surfaces having a same polarity.

A parallel magnetic circuit motor includes a rotor without magnets and a stator with magnets. The rotor, stator and windings are configured to produce unidirectional current and torque with electrically independent phases.

A parallel magnetic circuit motor includes a rotor without magnets and a stator with magnets. The rotor, stator and windings are configured to produce unidirectional current and torque with electrically independent phases.

The disclosure relates to a polyphase transverse flux machine including a stator and a rotor configured to rotate relative to the stator about an axis in a circumferential direction. The transverse flux machine includes an electrical line running along a plurality of yokes in the circumferential direction, and a pair of permanent magnet arrays running in parallel in the circumferential direction. A plurality of return path bodies is provided in the stator, wherein each yoke has an associated return path body at a distance from the associated yoke in the radial direction. The magnetization direction of the permanent magnets in the permanent magnet arrays changes in such a way that a closed magnetic flux repeatedly occurs at each yoke during rotation of the rotor. The closed magnetic flux runs from one permanent magnet array across a respective yoke to the other permanent magnet array, and from there, across the associated return path body, back to the first-mentioned permanent magnet array.

The disclosure relates to a polyphase transverse flux machine including a stator and a rotor configured to rotate relative to the stator about an axis in a circumferential direction. The transverse flux machine includes an electrical line running along a plurality of yokes in the circumferential direction, and a pair of permanent magnet arrays running in parallel in the circumferential direction. A plurality of return path bodies is provided in the stator, wherein each yoke has an associated return path body at a distance from the associated yoke in the radial direction. The magnetization direction of the permanent magnets in the permanent magnet arrays changes in such a way that a closed magnetic flux repeatedly occurs at each yoke during rotation of the rotor. The closed magnetic flux runs from one permanent magnet array across a respective yoke to the other permanent magnet array, and from there, across the associated return path body, back to the first-mentioned permanent magnet array.