VOICE COIL MOTOR

PURPOSE:To provide a dividing method of magnetic circuit which has a smaller magnetic loss in a voice coil motor that consists of magnetic circuits and voice coils. CONSTITUTION:The magnetic circuit of the voice coil motor is a perfect closed type in which yokes 1a and 1b completely enclose permanen...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KAMIMURA NAOTO, NAGAYA YOSHINORI, KOJIMA TOSHIAKI, NISHIMURA YUJI
Format:	Patent
Sprache:	eng
Schlagworte:	INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS
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Beschreibung
Zusammenfassung:	PURPOSE:To provide a dividing method of magnetic circuit which has a smaller magnetic loss in a voice coil motor that consists of magnetic circuits and voice coils. CONSTITUTION:The magnetic circuit of the voice coil motor is a perfect closed type in which yokes 1a and 1b completely enclose permanent magnets 2a and 2b and is evenly divided to left and right. Since the left and right magnetic circuits are repulsive to each other, they are combined by screws 6 and nuts 7. By this arrangement, the magnetic paths become symmetrical in left and right, the yokes are divided at the center plane where practically no flux exists. Therefore, no magnetic loss exists due to the division of yokes.