Heating regulator with current-dependent reference monitoring - is dynamically adapted dependent upon operating current and ambient temp. and incorporates limiter and regulator in form of knob thermostats with combination of resistances

摘要

The reference resistances (R1,R2,R3) are divided into two groups, but thermically form a unit. NTC resistances (R4,R5) are connected in series to the one group, so that the current distribution is temp.-dependent. These temp.-dependent NTC resistances are connected via moulded resin thermically to the reference resistances (R1,R2,R3). The moulded resin forces a temp. distribution and delay between the reference monitoring (R1,R2,R3) and the surface of the housing on the NTC resistances (R4,R5). The heating element (R6) on the heating regulator can be thermically coupled. If the NTC resistances (R4,R5) heat up, the one reference resistance (R3) is parallel-connected to the other two (R1,R2), and the current-dependent heat development reduces. The total resistances of the reference resistances (R1-R3) is always smaller than the heat resistance (R6). USE/ADVANTAGE - For the regulation and monitoring of electrical heating circuits.