MOTOR DRIVE DEVICE

PROBLEM TO BE SOLVED: To enable to control regenerative current when the number of rotations of a motor becomes not less than the number of rotations of no load. SOLUTION: In a variable field motor, if it is determined that lead angle control is being executed in regenerative control, a core (stator...

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Bibliographische Detailangaben
Hauptverfasser:	YANAGIHARA TAKEYA, KAWAGOE KUNIAKI
Format:	Patent
Sprache:	eng
Schlagworte:	CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DYNAMO-ELECTRIC MACHINES ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERATION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To enable to control regenerative current when the number of rotations of a motor becomes not less than the number of rotations of no load. SOLUTION: In a variable field motor, if it is determined that lead angle control is being executed in regenerative control, a core (stator) is pulled out to decrease a magnetic flux between the stator and the rotor to enable higher-speed rotation because the lead angle control corresponding to the high-speed operation is being executed. In this way, the operation for increasing the number of rotations at not less than the maximum rotation number in no load in a state where the magnetic flux is the maximum, and the regenerative processing for the higher-speed rotation state can be executed. Thus, overcharging due to over-rotation can be prevented. COPYRIGHT: (C)2009,JPO&INPIT