Processing

Please wait...

Settings

Settings

Goto Application

1. WO2012058033 - SYSTEMS, METHODS, AND DEVICES FOR DEMODULATING INDUCTION MOTOR INSTANTANEOUS ROTOR SLOT HARMONIC FREQUENCY

Publication Number WO/2012/058033
Publication Date 03.05.2012
International Application No. PCT/US2011/056489
International Filing Date 15.10.2011
IPC
H02P 1/24 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
1Arrangements for starting electric motors or dynamo-electric converters
16for starting dynamo-electric motors or dynamo-electric converters
24for starting an individual ac commutator motor
CPC
G01R 31/343
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
34Testing dynamo-electric machines
343in operation
H02P 21/18
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
21Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
14Estimation or adaptation of machine parameters, e.g. flux, current or voltage
18Estimation of position or speed
H02P 2203/09
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
2203Indexing scheme relating to controlling arrangements characterised by the means for detecting the position of the rotor
09Motor speed determination based on the current and/or voltage without using a tachogenerator or a physical encoder
H02P 2207/01
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
2207Indexing scheme relating to controlling arrangements characterised by the type of motor
01Asynchronous machines
H02P 23/14
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
23Arrangements or methods for the control of AC motors characterised by a control method other than vector control
14Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
Applicants
  • SCHNEIDER ELECTRIC USA, INC. [US]/[US] (AllExceptUS)
  • GAO, Zhi [CN]/[US] (UsOnly)
  • TURNER, Larry, A. [US]/[US] (UsOnly)
  • LEPRETTRE, Benoit [FR]/[FR] (UsOnly)
  • COLBY, Roy, S. [US]/[US] (UsOnly)
Inventors
  • GAO, Zhi
  • TURNER, Larry, A.
  • LEPRETTRE, Benoit
  • COLBY, Roy, S.
Agents
  • SWINDELLS, Justin, D.
Priority Data
10290582.528.10.2010EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SYSTEMS, METHODS, AND DEVICES FOR DEMODULATING INDUCTION MOTOR INSTANTANEOUS ROTOR SLOT HARMONIC FREQUENCY
(FR) SYSTÈMES, PROCÉDÉS ET DISPOSITIFS POUR DÉMODULER UNE FRÉQUENCE HARMONIQUE D'ENCOCHE DE ROTOR INSTANTANÉE DE MOTEUR À INDUCTION
Abstract
(EN)
A method and apparatus to dynamically and adaptively demodulate induction motor instantaneous rotor slot harmonic frequency for line-connected squirrel-cage polyphase induction motors. The instantaneous rotor slot harmonic frequency carries essential information on the instantaneous rotor speed. Based on a correlation between the motor's input power and its rotor slot harmonic frequency, a dynamically varying carrier frequency is computed and used in a rotor slot harmonic frequency detector. The rotor slot harmonic frequency detector is based on a superheterodyne principle. It contains a generalized linear-phase low-pass filter, whose bandwidth is estimated dynamically by a filter bandwidth estimator. The rotor slot harmonic frequency detector also includes a latency compensator, which receives the dynamically varying carrier frequency signal and synchronizes it with the output of a frequency demodulator.
(FR)
L'invention porte sur un procédé et sur un appareil pour démoduler de façon dynamique et adaptative une fréquence harmonique d'encoche de rotor instantanée de moteur à induction pour moteurs à induction polyphasés à cage d'écureuil connectés en ligne. La fréquence harmonique d'encoche de rotor instantanée achemine une information essentielle concernant la vitesse de rotor instantanée. Sur la base d'une corrélation entre la puissance d'entrée du moteur et sa fréquence harmonique d'encoche de rotor, une fréquence porteuse variant de façon dynamique est calculée, et est utilisée dans un détecteur de fréquence harmonique d'encoche de rotor. Le détecteur de fréquence harmonique d'encoche de rotor est basé sur un principe superhétérodyne. Il contient un filtre passe-bas à phase linéaire généralisé, dont la largeur de bande est estimée de façon dynamique par un estimateur de largeur de bande de filtre. Le détecteur de fréquence harmonique d'encoche de rotor comprend également un compensateur de latence, qui reçoit le signal de fréquence porteuse variant de façon dynamique et qui synchronise celui-ci avec la sortie d'un démodulateur de fréquence.
Latest bibliographic data on file with the International Bureau