INVERTER CONTROLLER

PURPOSE:To widen usability, by performing the changeover control of a pulse mode according to signal and output frequency related to an output AC voltage rate. CONSTITUTION:An inverter controller is composed of a rotational frequency arithmetic section 1, a slip frequency arithmetic section 2, an ad...

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Bibliographische Detailangaben
Hauptverfasser:	HORIE SATORU, JINBO YOSHIJI
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 ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERATION MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES PERFORMING OPERATIONS TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	PURPOSE:To widen usability, by performing the changeover control of a pulse mode according to signal and output frequency related to an output AC voltage rate. CONSTITUTION:An inverter controller is composed of a rotational frequency arithmetic section 1, a slip frequency arithmetic section 2, an adder A, an output AC voltage rate arithmetic section 6, a pulse mode arithmetic section 7, and a modulation factor arithmetic section 8. Obtained modulation factor alpha and pulse mode N together with output frequency (f) from the adder A are inputted to a pulse width modulation controlling section 5, and specified gate signal GATE is outputted. The output signal is fed to the gates of the respective switching elements of an inverter main-circuit. As a result, by taking in an output AC voltage rate (the operation factor of an inverter), a pulse mode change-over so that an output current ripple factor may always come to a minimum is automatically obtained, and the change of pulse mode change-over characteristic is not to be needed.