Abstract: A stator includes a stator core having a plurality of inner stator teeth and a ring-shaped stator yoke. The plurality of inner stator teeth is arranged on an inner side of the stator yoke at intervals along a circumferential direction of the stator yoke, and extends to a central axis of the stator yoke, so that stator slots are formed between adjacent inner stator teeth; and a first phase winding, a second phase winding, and a third phase winding wound around two adjacent inner stator teeth. Each of the stator slots is divided into an inner space and an outer space along a radial direction of the stator yoke; each of the first phase winding, the second phase winding, and the third phase winding penetrates through inner spaces or outer spaces of the corresponding two stator slots.

Abstract: The present disclosure relates to a power factor correction circuit, a control method, and an electrical appliance. The power factor correction circuit may include: a power regulation branch, including a first switching unit, a second switching unit and a branch sampling resistor connected in series sequentially; an inductive branch, connected between an AC power source and a power regulation branch; a rectifier branch, including a first rectifier unit and a second rectifier unit, the rectifier branch may include a main line sampling resistor; a capacitance branch; a control circuit sampling a branch current flowing through each of the branch sampling resistors and a main line current flowing through the main line sampling resistor respectively, and controlling the switching of each power regulation branch sequentially. With the branch sampling resistor and the main line sampling resistor, the overall cost of the power factor correction circuit may be reduced.

Abstract: Provided are a method for detecting a junction temperature of a switch tube, an electric motor controller, an electric motor control system, and a medium. The electric motor control system includes a three-phase inverter bridge for driving an electric motor to operate. The method includes determining a tube voltage drop and a turn-on current when a lower tube of at least one phase bridge arm in the three-phase inverter bridge is turned on; determining, according to the tube voltage drop and the turn-on current, a turn-on resistance when the lower tube of the at least one phase bridge arm is turned on; and determining, according to the turn-on resistance, a junction temperature of a lower tube of the at least one phase bridge arm.

Abstract: A single-resistor measurement method, a motor control method, a controller, and a control system are provided. A direct-current bus current flowing through a single sampling resistor is obtained. When a lower tube of a phase bridge arm is switched on, a switch-on current is determined based on the direct-current bus current, and an on-tube voltage drop is obtained. A switch-on resistance is determined based on the switch-on current and the on-tube voltage drop. A three-phase current outside a current measurement dead zone is determined based on the direct-current bus current. A three-phase current inside the current measurement dead zone is determined based on the on-tube voltage drop and the switch-on resistance. A three-phase feedback current of the motor is determined based on the three-phase current outside the current measurement dead zone and the three-phase current inside the current measurement dead zone.

Abstract: A commutation error compensation method for an electric motor includes: when a rotor, that has not been corrected, in an electric motor rotates in a set direction, collecting a position signal and a three-phase current signal of the rotor, wherein the position signal of the rotor represents the rotation angle of the rotor; filtering processing on the three-phase current signal to obtain a fundamental component of the three-phase current signal, and determining a position error compensation signal of the electric motor on the basis of the fundamental component of the three-phase current signal; determining an ideal phase interval of the rotor according to the position error compensation signal and the position signal of the rotor; and determining an adjustment method for the rotor of the electric motor according to the ideal phase interval of the rotor, and commutating the rotor of the electric motor according to the adjustment method.

Abstract: A commutation control method, a device for a brushless direct current motor, and a storage medium are described. The method includes performing detection on a position of a rotor in a brushless direct current motor. The detection is further configured to be triggered by commutation of the brushless direct current motor. The method includes determining, for the brushless direct current motor, a first drive scheme corresponding to the detected position of the rotor, the first drive scheme indicates a manner in which a three-phase full-bridge circuit of the brushless direct current motor operates; updating a pulse width modulation (PWM) drive signal, the updating is performed on the basis of the first drive scheme; and using the updated PWM drive signal to control the brushless direct current motor to perform commutation.

Abstract: A commutation error compensation method for an electric motor includes: when a rotor, that has not been corrected, in an electric motor rotates in a set direction, collecting a position signal and a three-phase current signal of the rotor, wherein the position signal of the rotor represents the rotation angle of the rotor; filtering processing on the three-phase current signal to obtain a fundamental component of the three-phase current signal, and determining a position error compensation signal of the electric motor on the basis of the fundamental component of the three-phase current signal; determining an ideal phase interval of the rotor according to the position error compensation signal and the position signal of the rotor; and determining an adjustment method for the rotor of the electric motor according to the ideal phase interval of the rotor, and commutating the rotor of the electric motor according to the adjustment method.

Abstract: A stator includes a stator core having a plurality of inner stator teeth and a ring-shaped stator yoke. The plurality of inner stator teeth is arranged on an inner side of the stator yoke at intervals along a circumferential direction of the stator yoke, and extends to a central axis of the stator yoke, so that stator slots are formed between adjacent inner stator teeth; and a first phase winding, a second phase winding, and a third phase winding wound around two adjacent inner stator teeth. Each of the stator slots is divided into an inner space and an outer space along a radial direction of the stator yoke; each of the first phase winding, the second phase winding, and the third phase winding penetrates through inner spaces or outer spaces of the corresponding two stator slots.

Abstract: A commutation control method, a device for a brushless direct current motor, and a storage medium are described. The method includes performing detection on a position of a rotor in a brushless direct current motor. The detection is further configured to be triggered by commutation of the brushless direct current motor. The method includes determining, for the brushless direct current motor, a first drive scheme corresponding to the detected position of the rotor, the first drive scheme indicates a manner in which a three-phase full-bridge circuit of the brushless direct current motor operates; updating a pulse width modulation (PWM) drive signal, the updating is performed on the basis of the first drive scheme; and using the updated PWM drive signal to control the brushless direct current motor to perform commutation.

Abstract: The present disclosure relates to a power factor correction circuit, a control method, and an electrical appliance. The power factor correction circuit may include: a power regulation branch, including a first switching unit, a second switching unit and a branch sampling resistor connected in series sequentially; an inductive branch, connected between an AC power source and a power regulation branch; a rectifier branch, including a first rectifier unit and a second rectifier unit, the rectifier branch may include a main line sampling resistor; a capacitance branch; a control circuit sampling a branch current flowing through each of the branch sampling resistors and a main line current flowing through the main line sampling resistor respectively, and controlling the switching of each power regulation branch sequentially. With the branch sampling resistor and the main line sampling resistor, the overall cost of the power factor correction circuit may be reduced.