US 10,122,267 B2 · Electronic control device

Abstract

In a step-up circuit, which is an electronic control device, changes in current caused by a current rise when stepping up is started and a current drop when stepping up is stopped generate magnetic induction noise due to fluctuations in the electromagnetic induction voltage in signal lines around the step-up circuit. The present invention is a step-up circuit for stepping up by current control, wherein the step-up circuit is provided with a plurality of target current values for retaining a step-up current so that the current is raised in a stepwise manner when stepping up is started and dropped in a stepwise manner when stepping up is stopped. The present invention reduces electromagnetic induction noise generated by the changes in current when stepping up is started and when stepping up is stopped.

Claims6

Dependent claims

An electronic control device comprising:

a step-up switching element, a coil, and a diode configured to generate a step-up voltage;
and
a capacitor mounted to store the step-up voltage, wherein
current values at a time of a current rise when stepping up is started are controlled in a stepwise manner such that a plurality of current values are used as a current is increased in the stepwise manner during the current rise, and the current values at a time of a current drop when stepping up is stopped are controlled in the stepwise manner such that the plurality of current values are used as the current is decreased in the stepwise manner during the current drop.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/313,270Filed 7 May 2015

Priority

JP 2014-10664123 May 2014

Published

US 2017/0201172 A113 Jul 2017

Granted

6 Nov 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

H02M 3/07
Using resistors or capacitors, e.g. potential divider: using capacitors charged and discharged alternately by semiconductor devices with control…
H02M 3/155
Using devices of a triode or transistor type requiring continuous application of a control signal: using semiconductor devices only
H03K 5/19
Manipulating of pulses not covered by one of the other main groups of this subclass: monitoring patterns of pulse trains
H02M
Apparatus for conversion between ac and ac, between ac and dc, or

Electronic control device

Life of this patent

Electronic control device

Life of this patent

Abstract

Claims6