Control for electrical heating circuit, in particular for motor vehicle
US10477621B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2014 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | Mar 25, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B1/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device (1) for controlling an electrical heating circuit (2) comprising a number N of heating elements (21-23) connected in parallel, comprises, according to the invention: N electronic switches (T1-T3), each able to be connected in series with one of the N heating elements (21-23); a module (10) able to receive a power setpoint in the form of a control signal (PWM) with duty ratio varying as a function of power; means (12) for extracting a mean value (formula (I)) of the control signal (PWM) received; and P comparators (C1-C3), the integer P being less than or equal to N, which are able to compare the mean value (formula (I)) extracted with P distinct threshold values (Ref1-Ref3) and to generate P comparison signals (S1-S3), each comparison signal serving to control a toggling of the electronic switch (T1-T3) associated with at least one heating element into the open or closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.