公开(公告)号：DE59814321D1

公开(公告)日：2009-01-08

申请号：DE59814321

申请日：1998-12-15

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： DIEFENBACH GERHARD ,  REICHINGER CHRISTIAN DR ,  WENDT MATTHIAS DR

IPC: H01L41/09 ,  H02N2/00 ,  B26B19/28 ,  H02N2/10 ,  H02N2/12

Abstract: Drive arrangement has at least one piezoelectric drive element (3) with piezoelectric resonator (4) and at least two frictional elements (10,11) mounted opposite each other on resonator, which is mounted between two rotation elements (1,2) and biased to force frictional elements against the rotation elements. An electrical arrangement stimulates resonator vibration. Independent claim are also included for a razor and a domestic electrical appliance using the drive system.

公开(公告)号：DE50111514D1

公开(公告)日：2007-01-11

申请号：DE50111514

申请日：2001-02-19

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MORALES SERRANO FRANCISCO DR ,  REICHINGER CHRISTIAN DR

IPC: H01L41/04 ,  B26B19/28 ,  H02N2/00 ,  H02N2/06 ,  H02N2/14

Abstract: The invention relates to a circuit for the control of a piezoelectric drive (1).An output signal of a first measurement circuit (4) is applied to a first input of a phase detector (5), an output signal of a logic circuit (10) or an output signal of a second measurement circuit (13) is applied to a second input of the phase detector (5), a second output signal of the logic circuit (10) is applied as an input signal to a final stage (2) which serves to supply an alternating voltage to the piezoelectric drive (1), a loop filter (7) processes the output signal of the phase detector (5) and supplies a control signal to a voltage-controlled oscillator (6), whose output signal is supplied to the input of the logic circuit (10), and a delay element (8) has been provided to adjust the frequency of the optimum operating point and efficiency of the controlled piezoelectric drive (1).

公开(公告)号：DE50109989D1

公开(公告)日：2006-07-20

申请号：DE50109989

申请日：2001-02-28

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： DIEFENBACH GERHARD ,  REICHINGER CHRISTIAN DR

IPC: H02N2/00 ,  H02N2/10 ,  B26B19/28 ,  H01L41/08 ,  H01L41/09 ,  H02N2/04 ,  H02N2/12

Abstract: The actuator has an elongated piezoelectric resonator (3) for performing longitudinal vibrations acted on by elastic arrangement (10) mainly supported in the resonator's longitudinal direction and exerting a force on it in the direction of the movable part. The resonant frequency of the elastic arrangement is much lower than that of the resonator, which is guided perpendicularly to its length by at least one guide element (4,5). Independent claims are also included for the following: an electrically powered razor.