POWER SUPPLY DEVICE OF STEPPED PIEZOELECTRIC ENGINE (VERSIONS) Russian patent published in 2019 - IPC H02N2/00 H02N2/06 H02N2/08 H02N2/10 H01L41/04 H01L41/09 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used to power stepped piezoelectric motors used in everyday life, in transport and in industry for driving various mechanisms and pumps. Device comprises three parallel modules for generating pulses arriving at piezoelectric actuator surfaces P_n of corresponding module n (n=1, 2, 3). Each module n is connected by its output terminals to DC power supply source (hereinafter – DC), to which storage capacitor C1 is connected, and is formed by two half-bridges, middle points of which are connected by accumulating throttle L_n, and mid-bridge electronic switches control device. In the first embodiment, the modules are identical. First half-bridge consists of series-connected controlled electronic switches K_1n and K_2n, second half-bridge is made of series-connected controlled electronic switches K_3n and K_4n (hereinafter – switches). Parallel to switch K_1n diode D_1n is connected, to switch K_2n – diode D_2n, to switch K_3n – diode D_3n, to switch K_4n - diode D_4n. In the second embodiment, the middle module of the above-described device further includes a third half-bridge connected in parallel to the first half-bridge. Third half-bridge is formed by series-connected diode D₅₂ and switch K₅₂. Cathode of diode D₅₂ is connected to DC positive terminal, diode anode D₅₂ is connected to input of switch K₅₂. Output of switch K₅₂ is connected to DC negative terminal. Between middle point of third half-bridge and second half-bridge throttle L₂₂ is connected. In the third embodiment, all three modules are identical. First half-bridge of each module consists of series-connected keys K_1n and K_2n. Second half-bridge is formed by serially connected key K_3n and diode D_4n. Diodes are connected in parallel to each switch: switch K_1n – diode D_1n, switch K_2n – diode D_2n, switch K_3n – diode D_3n. Switch K_1n input is connected to DC positive terminal. Output of switch K_2n is connected to DC negative terminal. Switch K_3n input is connected to positive contact of piezo actuator P_n, diode anode D_4n is connected to negative contact of piezoelectric actuator P_n and to negative terminal DC. In the fourth embodiment, a third half-bridge is additionally connected to the first half-bridge of the second module. Third half-bridge is formed by series-connected diode D₅₂ and switch K₅₂. Cathode of diode D₅₂ is connected to DC positive terminal, diode anode D₅₂ is connected to input of switch D₅₂. Output of switch D₅₂ is connected to DC negative terminal. Middle points of the third half-bridge and the second half-bridge are connected by a throttle L₂₂, inductance of which is greater than inductor L₂. Device circuit is intended to generate electric oscillations on plates of each piezoactuator in different phases of each step of piezoelectric engine, which provides translational or rotary motion of working element of stepped piezoelectric engine with high energy efficiency. High energy efficiency is achieved due to preservation of energy released during discharge of piezoactuators, and return of this energy for subsequent charge of piezoelectric actuators at the next step of movement.

EFFECT: increased reliability, increased time of uninterrupted operation and energy saving.

4 cl, 5 dwg