Abstract
The process of current collection with a non-autonomous power source used for electric motors of a rolling stock occurs in a contact pair: pantograph’s skid (head) - contact wire. The main indicator of the quality of current collection is the contact pressure, which depends on many factors. The dominant factor is static pressure generated by spring mechanisms of the pantograph. The pressure is a result of dynamic and other random factors. It is difficult to keep it constant. One of the solutions for optimizing contact pressure can be a cable cam-spring mechanism installed in the lifting unit of the contact part of the pantograph. Due to the special cam shape, it is possible to stabilize forces of the contact insert. Static pressing does not depend on its altitude. Dynamic forces can be smoothed.
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