CN-115441707-B - Piezoelectric ceramic driving circuit

CN115441707BCN 115441707 BCN115441707 BCN 115441707BCN-115441707-B

Abstract

The embodiment of the invention provides a piezoelectric ceramic driving circuit, and relates to the technical field of driving circuits. The piezoelectric ceramic driving circuit comprises a switching power supply, an H bridge, a first switching circuit, a second switching circuit, a first energy storage element, a second energy storage element, a first diode and a second diode, wherein two ends of piezoelectric ceramic are respectively connected between two bridge arms of the H bridge, an upper left arm of the piezoelectric ceramic is connected to the cathode of the first diode, the anode of the first diode is connected to the switching power supply, the upper left arm is grounded through the first energy storage element, the first switching circuit is connected with the first diode in parallel, an upper right arm of the piezoelectric ceramic is connected to the cathode of the second diode, the anode of the second diode is connected to the switching power supply, the upper right arm is grounded through the second energy storage element, and the second switching circuit is connected with the second diode in parallel. In the invention, the energy released in the discharging process of the piezoelectric ceramic is recovered and reused through the energy storage element.

Inventors

WANG RENDE
PENG KUN
LIN CONG
LIU FUQUAN
LV XINKE

Assignees

河南皓泽电子股份有限公司

Dates

Publication Date: 20260508
Application Date: 20221008

Claims (10)

1. The piezoelectric ceramic driving circuit is characterized by comprising a switching power supply, an H bridge, a first switching circuit, a second switching circuit, a first energy storage element, a second energy storage element, a first diode and a second diode; The two ends of the piezoelectric ceramic are respectively connected between two bridge arms of the H bridge, an upper bridge left arm of the H bridge is connected to the negative electrode of the first diode, the positive electrode of the first diode is connected to the switching power supply, the upper bridge left arm is also grounded through the first energy storage element, and the first switching circuit is connected with the first diode in parallel; The upper right arm of the H bridge is connected to the cathode of the second diode, the anode of the second diode is connected to the switching power supply, the upper right arm is grounded through the second energy storage element, and the second switching circuit is connected in parallel with the second diode; The upper bridge left arm of the H bridge is a first PMOS tube, a source electrode of the first PMOS tube is connected to the cathode of the first diode and is grounded through the first energy storage element, a drain electrode of the first PMOS tube is connected to the lower bridge left arm of the H bridge, the upper bridge right arm of the H bridge is a second PMOS tube, a source electrode of the second PMOS tube is connected to the cathode of the second diode and is grounded through the second energy storage element, and a drain electrode of the second PMOS tube is connected to the lower bridge right arm of the H bridge.
2. The piezoelectric ceramic drive circuit according to claim 1, wherein the first and second switch circuits are both in an off state, and when the piezoelectric ceramic enters a discharge process, both the lower left arm and the lower right arm of the H-bridge are controlled to enter an on state for a first preset period of time, and the voltage across the piezoelectric ceramic is discharged.
3. The piezoelectric ceramic drive circuit according to claim 1, wherein the first and second switch circuits are both in an on state, and when the piezoelectric ceramic enters a discharging process, both the upper left and right arms of the H-bridge are controlled to enter an on state for a second predetermined period of time, and the piezoelectric ceramic charges the first and second energy storage elements.
4. The piezoelectric ceramic driving circuit according to claim 1, wherein the first switching circuit comprises a first mos transistor and a second mos transistor, a source electrode of the first mos transistor is connected to a source electrode of the second mos transistor, a drain electrode of the first mos transistor is connected to an anode of the first diode, a drain electrode of the second mos transistor is connected to a cathode of the first diode, and gate electrodes of the first and second mos transistors are connected to the switching power supply.
5. The piezoelectric ceramic driving circuit according to claim 1, wherein the second switching circuit comprises a third mos transistor and a fourth mos transistor, wherein a source electrode of the third mos transistor is connected to a source electrode of the fourth mos transistor, a drain electrode of the third mos transistor is connected to an anode of the second diode, a drain electrode of the fourth mos transistor is connected to a cathode of the second diode, and gate electrodes of the third mos transistor and the fourth mos transistor are connected to the switching power supply.
6. The piezoelectric ceramic driving circuit according to claim 4, wherein the first mos transistor and the second mos transistor are PMOS transistors.
7. The piezoelectric ceramic driving circuit according to claim 5, wherein the third mos transistor and the fourth mos transistor are PMOS transistors.
8. The piezoceramic drive circuit of claim 4, further comprising a first resistor, wherein the switching power supply is connected to the gates of the first and second mos transistors through the first resistor.
9. The piezoceramic drive circuit of claim 5, further comprising a first resistor, wherein the switching power supply is connected to the gates of the third and fourth mos transistors through the first resistor.
10. The piezoceramic drive circuit of claim 1, further comprising a second resistor, wherein a lower left arm of the H-bridge is grounded through the second resistor, and wherein a lower right arm of the H-bridge is grounded through the second resistor.

Description

Piezoelectric ceramic driving circuit Technical Field The invention relates to the technical field of driving circuits, in particular to a piezoelectric ceramic driving circuit. Background Piezoelectric ceramics, which are information function ceramic materials capable of mutually converting mechanical energy and electric energy-piezoelectric effects, have dielectric properties, elasticity, etc., in addition to piezoelectricity, and have been widely used in medical imaging, acoustic sensors, acoustic transducers, ultrasonic motors, etc. The piezoelectric ceramic is made by using the material thereof to cause the relative displacement of the centers of positive and negative charges inside the piezoelectric ceramic to generate polarization under the action of mechanical stress, so that the surfaces of two ends of the material generate bound charges with opposite signs, namely piezoelectric effect, and has sensitive characteristics. At present, piezoelectric ceramics are usually driven by electronic components manufactured by semiconductor processes such as an IC chip, but the piezoelectric ceramics have the problems of high power consumption, low efficiency and the like, and waste of energy is caused. Based on the technical problems, the applicant provides a technical scheme of the application. Disclosure of Invention The invention aims to provide a piezoelectric ceramic driving circuit which can store energy released in the discharging process of piezoelectric ceramic through an energy storage element and charge the piezoelectric ceramic by utilizing the energy stored by the energy storage element, so that the recovery and the utilization of the energy are realized, and the efficiency of the piezoelectric ceramic is improved. The piezoelectric ceramic driving circuit comprises a switching power supply, an H bridge, a first switching circuit, a second switching circuit, a first energy storage element, a second energy storage element, a first diode and a second diode, wherein two ends of piezoelectric ceramic are respectively connected between two bridge arms of the H bridge, an upper left arm of the piezoelectric ceramic is connected to the negative electrode of the first diode, the positive electrode of the first diode is connected to the switching power supply, the upper left arm is further grounded through the first energy storage element, the first switching circuit is connected in parallel with the first diode, an upper right arm of the piezoelectric ceramic is connected to the negative electrode of the second diode, the positive electrode of the second diode is connected to the switching power supply, the upper right arm of the piezoelectric ceramic is further grounded through the second energy storage element, and the second switching circuit is connected in parallel with the second diode. The embodiment of the invention provides a piezoelectric ceramic driving circuit, which can store energy released in the discharging process of piezoelectric ceramic through an energy storage element, and can charge the piezoelectric ceramic by utilizing the energy stored by the energy storage element, thereby realizing the recovery and the utilization of the energy and improving the efficiency of the piezoelectric ceramic. In one embodiment, the first switch circuit and the second switch circuit are both in an off state, and when the piezoelectric ceramic enters a discharging process, the lower left arm and the lower right arm of the piezoelectric ceramic are both controlled to enter an on state for a first preset time period, and the voltage at two ends of the piezoelectric ceramic is discharged. In one embodiment, the first switch circuit and the second switch circuit are both in a conductive state, and when the piezoelectric ceramic enters a discharging process, the upper left arm and the upper right arm of the piezoelectric ceramic are both controlled to enter a conductive state for a second preset period of time, and the piezoelectric ceramic charges the first energy storage element and the second energy storage element. In one embodiment, the first switching circuit comprises a first mos transistor and a second mos transistor, wherein a source electrode of the first mos transistor is connected with a source electrode of the second mos transistor, a drain electrode of the first mos transistor is connected with an anode of the first diode, a drain electrode of the second mos transistor is connected with a cathode of the first diode, and grid electrodes of the first mos transistor and the second mos transistor are connected to the switching power supply. In one embodiment, the second switching circuit comprises a third mos transistor and a fourth mos transistor, wherein the source electrode of the third mos transistor is connected with the source electrode of the fourth mos transistor, the drain electrode of the third mos transistor is connected with the positive electrode of the second diode, the drain electrode