Motor control device and method for controlling the same

When detecting an amount of noise current generated in an inverter and flowing into a noise filter, sampling the detection values with an interval of a carrier frequency, determining whether envelope curves of respective sampled values are deemed to be constant, and in a case where the envelope curv...

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Bibliographische Detailangaben
1. Verfasser:	Otsubo Masahiro
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROL OR REGULATION THEREOF CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	When detecting an amount of noise current generated in an inverter and flowing into a noise filter, sampling the detection values with an interval of a carrier frequency, determining whether envelope curves of respective sampled values are deemed to be constant, and in a case where the envelope curves of the sampled values are deemed to be constant, the motor control device changes the carrier frequency to another frequency that does not overlap a cutoff frequency fr of the noise filter, or to another frequency that is not close to the cutoff frequency fr of the noise filter. Due to this configuration, even when the noise filter incorporated in the motor control device is a noise filter that is manufactured without demanding any special measures to be taken to the manufacturers and is manufactured with specifications of noise filter manufacturers, a desired noise reduction effect can be obtained.