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1. WO2022045274 - EMI REDUCTION IN PWM INVERTERS USING ADAPTIVE FREQUENCY MODULATED CARRIERS

Publication Number WO/2022/045274
Publication Date 03.03.2022
International Application No. PCT/JP2021/031433
International Filing Date 20.08.2021
IPC
H02P 27/08 2006.1
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
27Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
04using variable-frequency supply voltage, e.g. inverter or converter supply voltage
06using dc to ac converters or inverters
08with pulse width modulation
H02P 29/50 2016.1
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
29Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
50Reduction of harmonics
CPC
H02M 1/44
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
1Details of apparatus for conversion
44Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
H02M 7/53871
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
7Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
42Conversion of dc power input into ac power output without possibility of reversal
44by static converters
48using discharge tubes with control electrode or semiconductor devices with control electrode
53using devices of a triode or transistor type requiring continuous application of a control signal
537using semiconductor devices only, e.g. single switched pulse inverters
5387in a bridge configuration
53871with automatic control of output voltage or current
H02M 7/53873
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
7Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
42Conversion of dc power input into ac power output without possibility of reversal
44by static converters
48using discharge tubes with control electrode or semiconductor devices with control electrode
53using devices of a triode or transistor type requiring continuous application of a control signal
537using semiconductor devices only, e.g. single switched pulse inverters
5387in a bridge configuration
53871with automatic control of output voltage or current
53873with digital control
H02M 7/5395
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
7Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
42Conversion of dc power input into ac power output without possibility of reversal
44by static converters
48using discharge tubes with control electrode or semiconductor devices with control electrode
53using devices of a triode or transistor type requiring continuous application of a control signal
537using semiconductor devices only, e.g. single switched pulse inverters
539with automatic control of output wave form or frequency
5395by pulse-width modulation
H02P 27/08
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
27Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
04using variable-frequency supply voltage, e.g. inverter or converter supply voltage
06using dc to ac converters or inverters
08with pulse width modulation
H02P 29/50
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
29Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
50Reduction of harmonics
Applicants
  • MITSUBISHI ELECTRIC CORPORATION [JP]/[JP]
Inventors
  • LIU, Dehong
  • SUGAWARA, Retsu
  • ORLIK, Philip
Agents
  • FUKAMI PATENT OFFICE, P.C.
Priority Data
17/036,04529.09.2020US
63/070,29026.08.2020US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) EMI REDUCTION IN PWM INVERTERS USING ADAPTIVE FREQUENCY MODULATED CARRIERS
(FR) RÉDUCTION D'EMI DANS DES ONDULEURS À PWM À L'AIDE DE PORTEUSES MODULÉES EN FRÉQUENCE ADAPTATIVES
Abstract
(EN) A controller is provided for generating carrier signals for a PWM generator controlling an inverter driving an electric actuator to reduce the EMI level of the inverter. The controller includes an interface configured to connect to the inverter, a memory configured to store a measured electromagnetic- interference (EMI) spectrum, a desired EMI spectrum and an EMI suppression rate program, and a processor. The processor is, in connection with the memory, configured to computing EMI suppression rates for a frequency range, wherein the EMI suppression determined adaptively by the measured EMI spectrum and the desired EMI spectrum, computing sweep duration of discrete frequency, wherein the sweep duration is determined by the EMI suppression rate of the discrete frequency, and a modulator configured to modulate the carrier signals based on the sweep durations of carrier frequencies and to transmit the modulated carrier signals to the PWM generator to generate PWM signals for the inverter.
(FR) L'invention concerne un dispositif de commande destiné à générer des signaux de porteuse pour un générateur de PWM commandant un onduleur pilotant un actionneur électrique pour réduire le niveau d'EMI de l'onduleur. Le dispositif de commande comprend une interface configurée pour se connecter à l'onduleur, une mémoire configurée pour stocker un spectre d'interférence électromagnétique (EMI) mesuré, un spectre d'EMI souhaité et un programme de taux de suppression d'EMI, ainsi qu'un processeur. Le processeur est, en liaison avec la mémoire, configuré pour calculer des taux de suppression d'EMI d'une gamme de fréquences, la suppression d'EMI étant déterminée de manière adaptative par le spectre d'EMI mesuré et par le spectre d'EMI souhaité, pour calculer la durée de balayage de la fréquence discrète, la durée de balayage étant déterminée par le taux de suppression d'EMI de la fréquence discrète, et par un modulateur configuré pour moduler les signaux de porteuse sur la base des durées de balayage des fréquences porteuses et pour transmettre les signaux de porteuse modulés au générateur de PWM de façon à générer des signaux de PWM pour l'onduleur.
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