Electrical installation comprising an electrical apparatus, a three-phase inverter and a control device for controlling the inverter, and related method

Patent metadata

Field	Value
Publication number	US-10116246-B2
Application number	US-201615259467-A
Country	US
Kind code	B2
Filing date	Sep 8, 2016
Priority date	Sep 9, 2015
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

The invention concerns an electrical installation providing an apparatus, a three-phase inverter and a control device, the inverter being adapted for generating a three-phase current presenting a first frequency for operating the apparatus and an undesired frequency component presenting a second frequency. The control device is adapted for measuring a parameter of each phase of the current, the measured parameters forming a measurement vector, and for calculating a Clarke transform, providing a first vector represented in a first basis of a two-dimensional vector space, of the measurement vector. The control device is adapted for generating a representation of the first vector in a second basis of the vector space, the second basis rotating at the second frequency with respect to the first basis.

First claim

The invention claimed is:

1. An electrical installation comprising:
a permanent-magnet synchronous motor comprising a rotation frequency for which the permanent-magnet synchronous motor produces a greatest rotational torque,
a three-phase inverter, and
a control device,
wherein the three-phase inverter generates a three-phase electrical current and supplies the permanent-magnet synchronous motor with the three-phase electrical current, the three-phase electrical current presenting a first frequency for operating the permanent-magnet synchronous motor, the three-phase electrical current also comprising an undesired frequency component presenting a second frequency, and the control device comprising:
a measurement module configured to measure a parameter of each phase of the three-phase electrical current, the measured parameters forming a measurement vector comprising a set of three numbers, each number being equal to currents of respective phases,
a first Clarke calculation module configured to calculate a Clarke transform of the measurement vector, the Clarke transform including a first vector containing two first values, the first vector being represented in a first basis of a two-dimensional vector space,
a command module for generating a control signal for controlling the three-phase inverter,
a first rotation module configured to generate a second vector containing two second values, the second vector being a representation of the first vector in a second basis of a two-dimensional vector space, the second basis rotating at the second frequency with respect to the first basis,
a first subtraction module configured to compare each second value to a corresponding first reference value for generating a corresponding first difference,
a second rotation module configured to generate a third vector containing two third values, the third vector being a representation of the first vector in a third basis of a two-dimensional vector space, the third basis rotating at the first frequency with respect to the first basis,
a second subtraction module configured to compare each third value to a corresponding second reference value for generating a corresponding second difference,
an identification module configured to calculate the second frequency from the first frequency,
a first integration module configured to calculate an integral of the second frequency, and
a second integration module configured to calculate an integral of the first frequency; wherein

the command module is configured to generate the control signal from the first differences and the second differences.

2. The electrical installation of claim 1 , wherein the control device further provides an estimation module configured to measure a rotation frequency of the permanent-magnet synchronous motor and for estimating the first frequency from the rotation frequency.

3. The electrical installation of claim 1 , wherein the command module further provides:
two proportional-integral controllers, each controller being configured to generate a first transitional signal from each first difference, both first transitional signals forming a first transitional vector,
a third rotation module configured to generate, from the first transitional vector, a fourth vector comprising fourth values, the fourth vector being a representation in the first basis of the first transitional vector, and
a second Clarke calculation module configured to calculate, from at least the fourth vector, a respective control value-for each phase of the three-phase electrical current.

4. The electrical installation of claim 1 , wherein each first reference value is equal to zero.

Assignees

• Sadi Haddad Lakdar
• Da Silva Joaquim
• Deandrade Andre
• Skf Magnetic Mechatronics

Inventors

• Sadi-Haddad Lakdar
• Da Silva Joaquim
• Deandrade Andre

Classifications

• H02P29/50

  Reduction of harmonics · CPC title

• H02P21/05 Primary

  specially adapted for damping motor oscillations, e.g. for reducing hunting · CPC title

• H02P21/50 Primary

  Vector control arrangements or methods not otherwise provided for in H02P21/00- H02P21/36 · CPC title

• H02P6/10

  Arrangements for controlling torque ripple, e.g. providing reduced torque ripple · CPC title

• H02P27/12

  pulsing by guiding the flux vector, current vector or voltage vector on a circle or a closed curve, e.g. for direct torque control · CPC title