Automatic and adaptive defluxing device and method implementing such a device

Patent metadata

Field	Value
Publication number	US-2016111992-A1
Application number	US-201514884528-A
Country	US
Kind code	A1
Filing date	Oct 15, 2015
Priority date	Oct 16, 2014
Publication date	Apr 21, 2016
Grant date	—

Abstract

A vector control driving device is provided for an electric motor receiving an operating setpoint, with stator windings receiving a driving current and producing a rotating magnetic field, the windings generating a voltage at terminals of the motor, a rotor producing a magnetic field to follow the rotating magnetic field, the device generating current in a vector domain, and configured to carry out a transform of the current from the vector domain to a real domain allowing for generation of the driving current, and configured to carry out an inverse transform of a parameter measured in the real domain on the stator windings into a transform of the parameter in the vector domain, and comparing the value of the inverse transform of the parameter with a predefined maximum parameter value, which can drive the generating of the current in the vector domain. An automatic and adaptive defluxing method is provided.

First claim

1 . A vector control driving device for an electric motor suitable for receiving an operating setpoint, the motor comprising:
a stator comprising windings, suitable for receiving a driving current and producing a rotating magnetic field, the windings of the stator generating a voltage at the terminals of the motor a rotor producing a magnetic field intended to follow the rotating magnetic field comprising:
a means for generating a current in a vector domain,
a computation means configured to carry out a transform of the current from the vector domain to a real domain allowing for the generation of the driving current,
an inverse computation means configured to carry out an inverse transform of a parameter measured in the real domain on the stator windings into an inverse transform of the parameter in the vector domain,
a means for comparing the value of the inverse transform of the parameter with a predefined maximum value of the parameter, the result of which makes it possible to drive the means for generating the current in the vector domain.

2 . The driving device according to claim 1 , wherein the current generated by the means for generating the current in the vector domain is a direct setpoint current established in Park coordinates and in that the computation means is configured to receive a quadrature setpoint current established in Park coordinates and proportional to the operating setpoint.

3 . The driving device according to claim 1 , wherein the parameter measured in the real domain is the voltage at the terminals of the motor.

4 . The driving device according to claim 1 , wherein the means for generating the current is a defluxing corrector delivering the current:
zero if the value of the inverse transform of the parameter is less than the predefined maximum parameter value or non-zero if the value of the inverse transform of the parameter is greater than or equal to the predefined maximum parameter value.

5 . The driving device according to claim 4 , wherein the means for generating the current is a proportional integral defluxing corrector.

6 . The driving device according to claim 4 , wherein the means for generating the current is an integral defluxing corrector.

7 . A method for vector control driving of an electric motor by a device according to claim 1 , comprising the following step:
generation of a current intended to modify the magnetic field produced by the stator so that the parameter corresponds to the operating setpoint.

8 . The method for vector control driving of an electric motor according to claim 7 , comprising a preliminary step of comparison of the value of the inverse transform of the parameter with a predefined maximum parameter value.

9 . The method for vector control driving of an electric motor according to claim 8 , comprising a step of generation of a current that is zero if the value of the inverse transform of the parameter is less than the predefined maximum parameter value.

10 . The method for vector control driving of an electric motor according to claim 8 , comprising a step of generation of a current that is non-zero if the value of the inverse transform of the parameter is greater than or equal to the predefined maximum parameter value.

Assignees

• Thales Sa

Inventors

• Guguen Stéphane
• Dal Arnaud
• Girier Thomas

Classifications

• H02P21/141

  Flux estimation · CPC title

• H02P21/0089 Primary

  using field weakening · CPC title

• H02P21/22

  Current control, e.g. using a current control loop · CPC title

• H02P21/0035 Primary

  Electricity · mapped topic