RESONANCE TYPE VIBRATION DEVICE - MURAKAMI SEIKI KOSAKUSHO KK

Title:

RESONANCE TYPE VIBRATION DEVICE

Document Type and Number:

Japanese Patent JP2005087808

Kind Code:

A

Abstract:

To provide a resonance type vibration device capable of controlling attraction force with simple constitution and high performance at a low cost.

This resonance type vibration device uses the attraction force of electromagnets 1 and restoring force of a spring, and is provided with search coils 4 disposed on the electromagnets 1 for detecting the gap magnetic flux of a movable core and a fixed core of the electromagnets 1, a characteristic calculation unit 6 of the electromagnets calculating the attraction force and amplitude of the electromagnets 1 from a coil voltage detected by the search coils 4, and a pulse width modulation device controlling the current of the coils of the electromagnets by the current value calculated from the attraction force.

Inventors:

KAMIYA YOSHINORI
MATSUMOTO EIJI

Application Number:

JP2003322107A

Publication Date:

April 07, 2005

Filing Date:

September 12, 2003

Export Citation:

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Assignee:

MURAKAMI SEIKI KOSAKUSHO KK
KAMIYA YOSHINORI
MATSUMOTO EIJI

International Classes:

B06B1/04; B06B1/14; H02K33/10; (IPC1-7): B06B1/04; B06B1/14; H02K33/10

Attorney, Agent or Firm:

Masu Kobori
Takato Tsutsumi

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