Regulating circuit for an electrically heated seat, especially one for automotive vehicles

Abstract

Abstract PCT No. PCT/EP89/00608 Sec. 371 Date Feb. 1, 1990 Sec. 102(e) Date Feb. 1, 1990 PCT Filed May 30, 1989 PCT Pub. No. WO89/12268 PCT Pub. Date Dec. 14, 1989.Fast and highly sensitive monitoring of electrical resistance-type heating elements of seat heaters in automotive vehicles is achieved by short-time breaking of the power supply to the electrical resistance-type heating element and coupling the electrical resistance-type heating element during this interruption to an electrical measuring section for applying to the electrical resistance-type heating element a measuring current which is significantly lower than the heating current. A controlling and monitoring circuit operating in this way permits testing of the electrical resistance-type heating element for a plurality of types of faults within a wide range of operating conditions.

Inventors

• 👤 Dipl. Ing. Lorenzen Guenter
• 👤 Dipl. Wirtschaftsing. Ruthenberg Bodo

Bibliographic Details