Saia Ag

Bayerische Motoren Werke Aktiengesellschaft

Urs Portmann

Ernst Schmidt

Peter Thoma

Walter Kuffner

Bernhard Buselmeier

A central carrier, which is constructed as a stamped part or a metallized plastic part is used for the mutual electrical and mechanical connection of the other components of the system. A plastic material and molded part is sprayed around the carrier. In turn, this molded part holds together the carrier which, after the plastic was sprayed around it, was divided into electrically insulated conductor parts, and which molded part forms housing walls as well as a plug casing.

Electrical driving unit

Small-size motors, particularly vehicle step motors in a system used to adjust vehicle parts, are connected directly with a housing in which an assigned electronic control system is housed. A bus supplies each of the motors or its associated electronic control system with adjusting commands and energy. The housings in which the electronic control systems are housed, are closed off tightly with respect to dust and dirt but not with respect to vapor, so that moisture can diffuse out of these housings. This arrangement permits a simple and operationally reliable construction.

Small-size motor and a process for manufacture and use thereof

By means of a potentiometer an analog voltage Ua is applied to an A/D converter. A reference voltage Uref is also applied to the A/D converter and the same produces a digital output information corresponding to the ratio between the analog voltage and the reference voltage. This digital output information of the A/D converter is periodically counted by a preselection counter and this counter delivers an output pulse whenever it has counted the value stored in the A/D converter. The potentiometer, A/D converter and counter form a time base of which the time unit depends on the position of the potentiometer only and not on fluctuations of the operating voltage. Due to the continuous periodic sampling and storing of the digital output information of the A/D converter, high accuracy of the time basis is obtained since a statistic mean value of the digital value is repeatedly counted.

Growing community of inventors

Villars-sur-Glane, Switzerland

Urs Portmann