Linear actuator for automatic gearbox, comprises two plate permanent magnets situated side by side with opposing polarities and moving within magnetic core which has three windings

摘要

Two permanent magnets (220,222) shaped as plates are located side by side and move in a magnetic core (215) which includes three electric windings (211,212,213). The permanent magnets have opposing polarities and the windings are distributed in a manner which allows for the step length and the covering effect of the bundled winding conductors. The steps are obtained by energising the windings successively Independent claims are also included for the following : 1) A coil control circuit which consists of bridges and switches 2) Open and closed loop actuator control methods 3) Automatic gearbox actuator of type which has control finger and uses the linear actuator for the translation required for gear selection