MOTOR CONTROL UNIT

A motor control unit (12) includes a PWM count calculator (46), a PWM count setter, and a PWM count changer. The PWM count calculator calculates first PWM counts of phases. Each first PWM count is calculated for a current control period (Ta). The PWM count setter sets the first PWM count of each pha...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	SUMASU, Hiroshi
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	A motor control unit (12) includes a PWM count calculator (46), a PWM count setter, and a PWM count changer. The PWM count calculator calculates first PWM counts of phases. Each first PWM count is calculated for a current control period (Ta). The PWM count setter sets the first PWM count of each phase as a second PWM count of a corresponding phase. The second PWM count is set for each of PWM periods (Tc) included in the current control period. The PWM count changer changes the second PWM count (Tc) of at least one of the phases, without changing the total of the second PWM counts of the at least one phase within the current control period (Ta), such that the number of times switching elements corresponding to the at least one phase are switched within the current control period is reduced.