Control system for a three-phase AC motor
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorsThomas Kristof, Dirk Herke
Life of this patent
Estimating the term…
Abstract
A method for controlling a three-phase AC motor, wherein the three-phase AC motor has a rotatably mounted rotor and a stator including a first group of coils and a second group of coils. Each of the coils generates an oscillating magnetic field upon actuation using an alternating current. The phases of the alternating currents are selected such that the superposition of the magnetic fields of the first group of coils generates a magnetic rotating field that rotates with a direction of rotation and the superposition of the magnetic fields of the second group of coils generates a magnetic rotating field that rotates counter to the direction of rotation. A system composed of a three-phase AC motor and an inverter for carrying out the control method is also described.
Claims6
In a three-phase alternating current (AC) motor having a rotatably mounted rotor and a stator including a first group of coils and a second group of coils, wherein each of the first group of coils and the second group of coils generate respective oscillating magnetic fields upon actuation using AC, a method for controlling the three-phase AC motor comprising:
- setting a first proportion of electrical energy to be converted into kinetic energy and a second proportion of electrical energy to be converted into heat;
- selecting respective phases of AC based on the first proportion and the second proportion such that a first superposition of the respective magnetic fields of the first group of coils generates a first magnetic rotating field that rotates with a first direction of rotation and a second superposition of the respective magnetic fields of the second group of coils generates a second magnetic rotating field that rotates counter to the first direction of rotation to generate from AC both:
- (i) kinetic energy for rotary movement of a vehicle in the first proportion, and (ii) heat without a separate heating mechanism of the vehicle in the second proportion;
- driving the rotatory movement of the vehicle utilizing the generated kinetic energy in the first proportion;
- and
- feeding the generated heat in the second proportion to a heating/cooling system of the vehicle.
A system comprising:
- a three-phase alternating current (AC) motor;
- and
- an inverter,
- wherein:
- the three-phase AC motor has a rotatably mounted rotor and a stator comprising a first group of coils and a second group of coils,
- each of the first group of coils and the second group of coils generate respective oscillating magnetic fields upon actuation using AC generated by the inverter,
- respective phases of AC based on the first proportion and the second proportion are configured such that a first superposition of the respective magnetic fields of the first group of coils generates a first magnetic rotating field that rotates with a first direction of rotation and a second superposition of the respective magnetic fields of the second group of coils generates a second magnetic rotating field that rotates counter to the direction of rotation to generate from AC both (i) kinetic energy for rotary movement of a vehicle in the first proportion, and (ii) heat without a separate heating mechanism of the vehicle in the second proportion,
- the rotary movement of the vehicle is driven utilizing the generated kinetic energy in the first proportion, and
- the generated heat in the second proportion is fed to a heating/cooling system of the vehicle.
Dependencies are inferred from the claim text.