# US 2021/0332811 A1 · Driving system for driving piezoelectric pump

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- Number: US 2021/0332811 A1
- Document ID: US20210332811A1
- Status: Published application
- Kind: A1
- Application number: 17/301,951
- Filed: 2021-04-20
- Published: 2021-10-28
- Earliest claimed: 2020-04-24
- Assignees: Microjet Technology Co., Ltd.
- Applicants: Microjet Technology Co., Ltd.
- Inventors: Hao-Jan Mou; Shih-Chang Chen; Che-Wei Huang; Chun-Hung Liao; Wei-Chuan Liao; Chi-Feng Huang; Yung-Lung Han; Tsung-I Lin; Chin-Wen Hsieh
- Web page: https://patentgrep.com/patent/US20210332811A1

## CPC

- F04B 43/046: {with piezoelectric drive}
- H10N 30/802: {Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits}
- H10N 30/2047: {Membrane type}
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR

## Abstract

A driving system for driving piezoelectric pump includes one or more mechanical devices and a driving circuit system electrically connected to the at least one mechanical device. The driving circuit system includes a pump-driving unit, a linear voltage-stabilizing unit, a microcontroller unit, a current-sensing unit, and a connection unit.

## Claims

### Claim 1

A driving system for driving piezoelectric pump, comprising:
at least one mechanical device; and
a driving circuit system electrically connected to the at least one mechanical device, wherein the driving circuit system comprises a pump-driving unit, a linear voltage-stabilizing unit, a microcontroller unit, a current-sensing unit, and a connection unit;
wherein the pump-driving unit receives a first signal, a second signal, and a third signal that are transmitted by the microcontroller unit, and drives the at least one mechanical device to operate;
wherein the current-sensing unit receives a fourth signal transmitted by the pump-driving unit so as to obtain an actuation current value of the at least one mechanical device;
wherein the linear voltage-stabilizing unit is a high frequency voltage-stabilizing element, wherein the linear voltage-stabilizing unit, the current-sensing unit, and the microcontroller unit are coupled to each other through a fifth signal and a sixth signal;
wherein the microcontroller unit executes a program to generate the first signal, the second signal, and the third signal; and
wherein the connection unit provides a reset signal, a seventh signal, an eighth signal, a 5V power supply, and a ground terminal, wherein the connection unit and the microcontroller unit are coupled to each other through the reset signal, the seventh signal, and the eighth signal.

### Claim 2 (depends on 1)

The driving system for driving piezoelectric pump according to claim 1, wherein the at least one mechanical device is a piezoelectric pump.

### Claim 3 (depends on 2)

The driving system for driving piezoelectric pump according to claim 2, wherein the at least one mechanical device has an inlet hole, an outlet hole, a first input voltage, and a second input voltage.

### Claim 4 (depends on 3)

The driving system for driving piezoelectric pump according to claim 3, wherein the first input voltage and the second input voltage respectively electrically connected to two contacts of the pump-driving unit.

### Claim 5 (depends on 1)

The driving system for driving piezoelectric pump according to claim 1, wherein when the microcontroller unit executes the program, the microcontroller unit generates an adjusted first signal, an adjusted second signal, and an adjusted third signal based on feedback signals of the fifth signal and the sixth signal through the program, and then the program sends the adjusted first signal, the adjusted second signal, and the adjusted third signal to the pump-driving unit.

### Claim 6 (depends on 1)

The driving system for driving piezoelectric pump according to claim 1, wherein the first signal is a start signal for controlling the pump-driving unit.

### Claim 7 (depends on 1)

The driving system for driving piezoelectric pump according to claim 1, wherein the second signal affects and controls an amplitude of an output voltage provided by the pump-driving unit to the at least one mechanical device.

### Claim 8 (depends on 1)

The driving system for driving piezoelectric pump according to claim 1, wherein the second signal affects and controls a switching frequency of an output voltage provided by the pump-driving unit to the at least one mechanical device.