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Inductive load control

專利號(hào)
US10867734B2
公開日期
2020-12-15
申請(qǐng)人
ZF Friedrichshafen AG（DE Friedrichshafen）
發(fā)明人
Florian Weinl; Christoph Stritt; Ulrich Schmidt
IPC分類
H02M3/158; H01F7/18; H02M5/293; H02M3/155; H02M1/00; F16D25/00; F16D48/06; F16H61/02; F16K31/06
技術(shù)領(lǐng)域
voltage,load,value,in,loads,terminals,inductive,armature,can,be
地域： Friedrichshafen

摘要

A plurality of inductive loads (105) are connectable in parallel with one another between first and second terminals (120, 125), to which a controllable voltage (205) is applied. A method (300, 400) for operating the loads (105) includes the steps of detecting (305, 405) the connection of a previously non-energized load (105) between the terminals (120, 125); setting (310, 410, 435) the voltage (205) to a predetermined first value (210), and, after the lapse of a predetermined time interval (315, 415), adjusting the voltage (205) to a predetermined second value (215), with the second value (215) being lower than the first value (210).

說明書

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

A device for operating a switchable inductive load between two terminals comprises a half-bridge for applying a predetermined voltage between the terminals and a control device designed to actuate the half-bridge in such manner that a predetermined voltage is applied between the terminals. The control device is designed to set the voltage between the terminals to a predetermined first value when a previously non-energized load is connected between the terminals, then, after the lapse of a predetermined time interval, to reduce the voltage to a second value lower than the first value, and after the lapse of a further predetermined time interval to reduce the voltage from the second to a third value which is lower than the second value.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will now be described in more detail with reference to the attached figures, which show:

FIG. 1: A device for the control of inductive loads;

FIG. 2: Time sequences in inductive loads; and

FIGS. 3 and 4: In each case a method for controlling inductive loads.

 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

權(quán)利要求

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