DEVICES OF PIEZOELECTRIC EFFECT USE IN TRANSPORTATION VEHICLES Russian patent published in 2017 - IPC H02N2/18 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and energy converters operating basing on the use of piezoelectric ceramic materials and can be used in any field of engineering as an electric power source. Device comprises a rotor having mechanical connection with the hub of a vehicle, spring-loaded rollers able to insignificantly move along a load acting on piezoelectric elements. Rollers interact with groups of piezoelectric elements arranged in holes made in an isolated stator. Number of rollers is equal to the number of groups of the piezoelectric elements. Piezoelectric elements in the groups are isolated from each other and are placed with their planes perpendicular to the acting load and are electrically interconnected in parallel. Mechanical connection of the roller with the piezoelectric elements is implemented by non-conductive pressing elements with recesses, while the rollers have mating circular ledges. Pressing elements are interconnected by flexible links with recesses aligned with the rollers recesses. Number of piezoelectric elements in a group is selected depending on required output voltage of the group. To create the required DC voltage, for example, for charging the vehicle accumulator battery, a high-frequency voltage converter is used containing an input capacitor, on plates of which high voltage is supplied, and located between the plates a flat output inductance, from which low voltage is removed.

EFFECT: technical result is improvement of efficiency.

3 cl, 4 dwg