Global Patent Index - EP 1441372 A3

EP 1441372 A3 20071024 - Actuator driving apparatus and method

Title (en)

Actuator driving apparatus and method

Title (de)

Gerät und Verfahren zur Steuerung einer Stellvorrichtung

Title (fr)

Appareil et méthode de commande pour actionneur

Publication

EP 1441372 A3 20071024 (EN)

Application

EP 03029925 A 20031229

Priority

JP 2003017913 A 20030127

Abstract (en)

[origin: EP1441372A2] An actuator driving apparatus (10) comprising at least one processing circuit (12) including: a first switching device (32) placed between an exciting coil (14) of an actuator and a dc power source (16,18) and operated by a pulse-width modulated signal (S4) generated so as to correspond to an overexciting period (T2) and a holding period (T3) subsequent to the overexciting period (T2) in a drive period (T1); a reflux circuit (36) connected in parallel to the exciting coil (14) and including a fly-wheel diode (44) and a second switching device (42) connected in series to the fly-wheel diode (44); and a disconnection signal generator (38) sending a disconnection signal (S5) to the second switching device (42) for a predetermined period after the termination of the drive period (T1). The fly-wheel diode (44) is provided so that a current generated from one end of the exciting coil (14) toward the other end when turning off the first switching device (32) can be recirculated. The second switching device (42) is turned off by the disconnection signal (S5) to be generated with the termination of the drive period (T1) to interrupt the flow of current to the exciting coil (14).

IPC 8 full level

D03D 47/28 (2006.01); H01F 7/18 (2006.01); H01F 7/06 (2006.01)

CPC (source: EP KR)

H01F 7/06 (2013.01 - KR); H01F 7/1811 (2013.01 - EP); H01F 7/1844 (2013.01 - EP)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

Designated extension state (EPC)

AL LT LV MK

DOCDB simple family (publication)

EP 1441372 A2 20040728; EP 1441372 A3 20071024; CN 100414652 C 20080827; CN 1548597 A 20041124; JP 2004225229 A 20040812; JP 4401084 B2 20100120; KR 20040068853 A 20040802

DOCDB simple family (application)

EP 03029925 A 20031229; CN 200310121762 A 20031223; JP 2003017913 A 20030127; KR 20030100104 A 20031230