Motor and vehicle driving system, method and program
AssigneeMazda Motor Corporation
InventorKei YONEMORI
Life of this patent
Estimating the term…
Abstract
A motor includes a stator having a cylindrical shape and a rotor having a cylindrical shape rotatable about a central axis of the stator and is used to drive a front wheel of a vehicle by rotation of the rotor. The motor has a cage provided for the rotor and a permanent magnet provided for the rotor on an inner side of the cage. The permanent magnet unit is formed by a ferrite magnet.
Claims15
A motor comprising:
- a stator having a cylindrical shape;
- and
- a rotor having a cylindrical shape provided in the stator and is rotatable about a central axis of the stator, a driving wheel of a vehicle being driven by rotation of the rotor, wherein
- the rotor has a cage and a permanent magnet provided on an inner side of the cage, and
- the permanent magnet is formed by a ferrite magnet.
A method of operating a motor of a vehicle driving system including a stator having a cylindrical shape and
- a rotor having a cylindrical shape in the stator and rotatable about a central axis of the stator, a driving wheel of a vehicle being driven by rotation of the rotor, wherein the rotor has a cage and a ferrite magnet on an inner side of the cage, the method comprising
- operating the motor in a synchronous operation mode in which the rotor is rotated using a magnetic force of the permanent magnet;
- monitoring a characteristic of the motor;
- and
- in response to a condition regarding characteristic being met, switching to an asynchronous operation mode in which the rotor is rotated using an induced current produced in the cage.
A non-transitory computer readable storage device having computer readable instructions that when executed by circuitry, causes the circuitry to perform a method of operating a motor of a vehicle driving system including a stator having a cylindrical shape and a rotor having a cylindrical shape in the stator and rotatable about a central axis of the stator, a driving wheel of a vehicle being driven by rotation of the rotor, wherein the rotor has a cage and a ferrite magnet on an inner side of the cage, the method comprising
- operating the motor in a synchronous operation mode in which the rotor is rotated using a magnetic force of the permanent magnet;
- monitoring a characteristic of the motor, and
- in response to a condition regarding characteristic being met, switching to an asynchronous operation mode in which the rotor is rotated using an induced current produced in the cage.
Dependencies are inferred from the claim text.