Abstract: Disclosed is a magnetic encoder, a method and system for detecting an absolute electrical angle, and a readable storage medium. The magnetic encoder includes a magnetoresistance sensor, a magnetic field auxiliary coil and a coil current control circuit electrically connected with the magnetic field auxiliary coil, the magnetoresistance sensor being a planar component, the coil current control circuit being configured to supply current to the magnetic field auxiliary coil, to allow the magnetic field auxiliary coil to generate an auxiliary magnetic field, the auxiliary magnetic field influencing the magnetic field component in the first direction and the magnetic field component in the second direction, forming a resultant magnetic field, and the magnetoresistance sensor being configured to detect the resultant magnetic field and the component of the 2-dimension magnetic field generated by the magnet.

Abstract: The present disclosure provides a method and a system for detecting an absolute electrical angle, and a computer readable storage medium. The method includes: obtaining an angle sine signal corresponding to a magnetic component in a first direction and an angle cosine signal corresponding to a magnetic component in a second direction; calculating a scaling compensation sine signal and a scaling compensation cosine signal according to the angle sine signal, the angle cosine signal, and a scaling compensation formula; determining an angle interval corresponding to the scaling compensation sine signal and the scaling compensation cosine signal, and calculating a relative electrical angle according to a preset trigonometric function corresponding to the angle interval; obtaining a Hall signal detected by the Hall sensor, and determining a polarity position according to the Hall signal; and calculating the absolute electrical angle according to the relative electrical angle and the polarity position.

Abstract: The present invention discloses a winding structure and method having a high power density, and motor applying the above. The winding of the present invention has a multilayer 2D structure, has a distributed structure with an electrical angle of 180 degrees and is manufactured in the form of a PCB, wherein each layer arranged only one phase winding. Each phase windings contains 2 layers, or 4 layers, or other even layers, of windings. The number of coil cycles in every layer is the same as the motor poles, the winding layers of a same phase are connected via a through hole, the connecting hole is arranged at a corner of an upper portion of the winding loop inside.

Abstract: A sensorless driving method for a single phase alternating current permanent magnet motor is described. The method comprises a starting drive mode and a stable drive mode.

Abstract: A permanent-magnet AC motor comprises a motor and a controller coupled to the motor. The motor includes a winding. The controller includes a drive model configured to provide a drive current. Waveform of the drive current is spatially symmetrical. The winding has a waiting zone having electrical angle of 30° and a driving zone having electrical angle of 150° in each half electrical cycle when the motor is in operation. The driving zone is equally divided into five driving sub-zones.

Abstract: A three-phase PMAC motor comprises a rotor and a stator. The rotor includes a rotor iron core, a plurality of rotor teeth, a plurality of rotor slots each formed between two adjacent rotor teeth, and a plurality of permanent magnets disposed in respective rotor slots and attached on the rotor iron core. The plurality of permanent magnets forms at least 8 pairs of magnet poles with one or two permanent magnets being associated with one pair of magnetic poles. The stator includes a stator iron core, a plurality of stator teeth protruding inwardly from inner surface of the stator iron core, three groups of armature windings wound around each of the stator teeth, and a plurality of stator slots formed between two adjacent stator teeth. Each group of armature windings is associated with one electrical phase. An electrical phase shift exists between each two armature windings.