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1. WO2020193957 - A METHOD OF DETERMINING A POSITION OF A ROTOR OF A BRUSHLESS PERMANENT MAGNET MOTOR

Publication Number WO/2020/193957
Publication Date 01.10.2020
International Application No. PCT/GB2020/050740
International Filing Date 19.03.2020
IPC
H02P 6/182 2016.01
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
6Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
14Electronic commutators
16Circuit arrangements for detecting position
18without separate position detecting elements
182using back-emf in windings
H02P 6/18 2016.01
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
6Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
14Electronic commutators
16Circuit arrangements for detecting position
18without separate position detecting elements
H02P 6/21 2016.01
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
6Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
20Arrangements for starting
21Open loop start
H02P 25/04 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
25Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
02characterised by the kind of motor
04Single phase motors, e.g. capacitor motors
CPC
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 25/04
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
25Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
02characterised by the kind of motor
04Single phase motors, e.g. capacitor motors
H02P 6/181
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
6Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
14Electronic commutators
16Circuit arrangements for detecting position
18without separate position detecting elements
181using different methods depending on the speed
H02P 6/182
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
6Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
14Electronic commutators
16Circuit arrangements for detecting position
18without separate position detecting elements
182using back-emf in windings
H02P 6/21
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
6Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
20Arrangements for starting
21Open loop start
Applicants
  • DYSON TECHNOLOGY LIMITED [GB]/[GB]
Inventors
  • SHMIDT, Nikita
Agents
  • MITCHELL, Joshua
  • BOOTH, Andrew
  • MACPHERSON, Carolyn
  • CHAPMAN, Alan
  • HOBDAY, Duncan
  • MACKISACK, Anna
  • WARNER, Thomas
  • FOWLER, Maria
  • MACPHERSON, Craig
  • FORRESTER, Simon
Priority Data
1904290.228.03.2019GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A METHOD OF DETERMINING A POSITION OF A ROTOR OF A BRUSHLESS PERMANENT MAGNET MOTOR
(FR) PROCÉDÉ DE DÉTERMINATION D'UNE POSITION D'UN ROTOR D'UN MOTEUR SANS BALAI À AIMANT PERMANENT
Abstract
(EN)
A method (100) of determining a position of a rotor (18) of a brushless permanent magnet motor (14) includes measuring (102) phase current flowing through a phase winding (22) of the motor (14) during excitation of the phase winding (22), and measuring (103) voltage applied to the phase winding of the motor during excitation of the phase winding. The method (100) includes calculating (104) a phase of back EMF induced in the phase winding (22) using the measured phase current and the measured voltage. The method (100) includes determining (106) a zero-crossing point of the back EMF induced in the phase winding (22) using the calculated phase of back EMF induced in the phase winding (22). The method (100) includes determining (108) an aligned position of the rotor (18) of the brushless permanent magnet motor when the back EMF induced in the phase winding (22) is at the zero- crossing point.
(FR)
La présente invention concerne un procédé (100) de détermination d'une position d'un rotor (18) d'un moteur sans balai à aimant permanent (14) comprenant les étapes consistant à mesurer (102) un courant de phase circulant à travers un enroulement de phase (22) du moteur (14) pendant l'excitation de l'enroulement de phase (22), et à mesurer (103) la tension appliquée à l'enroulement de phase du moteur pendant l'excitation de l'enroulement de phase. Le procédé (100) comprend l'étape consistant à calculer (104) une phase de force contre-électromotrice induite dans l'enroulement de phase (22) en utilisant le courant de phase mesuré et la tension mesurée. Le procédé (100) comprend l'étape consistant à déterminer (106) un point de passage par zéro de la force contre-électromotrice induite dans l'enroulement de phase (22) en utilisant la phase calculée de force contre-électromotrice induite dans l'enroulement de phase (22). Le procédé (100) comprend l'étape consistant à déterminer (108) une position alignée du rotor (18) du moteur sans balai à aimant permanent lorsque la force contre-électromotrice induite dans l'enroulement de phase (22) se trouve au point de passage par zéro.
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