SISTEMA DI COMANDO OTTIMIZZATO NEL TEMPO PER ATTUATORI DI PORTE DI ASCENSORI BASATI SU MOTORI LINEARI ALIMENTATI DA LINEE IN CORRENTE

A linear motor for operating an elevator door is energized using a bang-bang control strategy (10) wherein three-phase AC utility mains (16) are connected (29) directly to the linear motor primary (14) by means of a motor control (12) in response to control signals (26) provided under the direction...

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Hauptverfasser: BARRET DAVID W, PERUGGI RICHARD E, HE THOMAS, KOWALCZYK THOMAS M, JAMINET JERONE F, MCHUGH THOMAS M, AHIGIAN EDWARD E, KULAK RICHARD E
Format: Patent
Sprache:ita
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Zusammenfassung:A linear motor for operating an elevator door is energized using a bang-bang control strategy (10) wherein three-phase AC utility mains (16) are connected (29) directly to the linear motor primary (14) by means of a motor control (12) in response to control signals (26) provided under the direction of a control strategy (10), which may be microprocessor-based. Commands (24) from an elevator controller to open/close the elevator door cause the system to operate the doors and a sensor (22) provides feedback (28) by means of which the control (10) is able to determine switch points for switching the AC mains.