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A drive power circuit and its drive method

A technology for driving power supply and charging circuit, which is applied in the direction of program control, instrument, computer control, etc. It can solve the problems of large influence of temperature change and load change, temperature rise of related charging and discharging devices, complex calculation and control, etc., to improve the system Reliability, lower device temperature rise, simple driving effect

Active Publication Date: 2022-07-19
MORNSUN GUANGZHOU SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme does achieve the purpose of adjusting the rise and fall time of the output voltage waveform, but because it needs to sample and calculate the charge and discharge speed, and then output the required PWM wave to drive and control the output voltage rise and fall time parameters, the calculation and control are extremely complicated. , is greatly affected by temperature changes and load changes; in addition, the existing solutions generally rely on switching tubes or discharge resistors to realize the discharge of the load, which consumes a lot of power and has low energy utilization efficiency. The temperature rise of related charging and discharging devices is very high, and the reliability is greatly improved. reduce

Method used

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  • A drive power circuit and its drive method
  • A drive power circuit and its drive method
  • A drive power circuit and its drive method

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no. 1 example

[0038] The output voltage generating module circuit of the first embodiment of the present invention is as follows Figure 4 As shown, the charging circuit 31 includes a MOS transistor TR1, a resistor R3, an optocoupler OC1 and a diode D2, the comparison circuit 33 includes an operational amplifier, a capacitor C1, a sampling resistor R1 and a sampling resistor R2, and the discharge circuit 34 includes an inductor L1, a diode D1, a MOS Tube TR2, resistor R4, transistor Q1 and resistor R5.

[0039] The drain of the MOS transistor TR1 is used to connect the output terminal of the main power supply module of the power supply module 1, the source of the MOS transistor TR1 is used to connect the comparison circuit and the capacitive load, the resistor R3 is connected between the gate and the source of the MOS transistor TR1, and the MOS transistor The gate of TR1 is connected to the negative output terminal of the optocoupler OC1. The positive output terminal of the optocoupler OC1...

no. 2 example

[0049] The output voltage generating module circuit of the second embodiment of the present invention is as follows: Figure 4 As shown, compared with the first embodiment, the difference is that the discharge circuit 35 (34) adopts a flyback structure, including a transformer T1, a diode D1, a MOS transistor TR2, a resistor R4, a resistor R5 and a transistor Q1, and the transformer T1 is a primary synonym The terminal is connected to one terminal of the capacitive load and the connection point of the comparison circuit 33, the primary terminal of the transformer T1 is connected to the drain of the MOS transistor TR2, the source terminal of the MOS transistor TR2 is connected to the ground, the secondary terminal of the transformer T1 is connected to the anode of the diode D1, and the secondary terminal of the transformer T1 is different. The name terminal is connected to the ground, the cathode of the diode D1 is used to connect the output terminal of the main power supply mod...

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Abstract

The invention discloses a driving power circuit, which relates to the technical field of driving power. The invention mainly consists of a power supply module, a control module and an output voltage generating module, wherein the output voltage generating module includes a charging circuit, a discharging circuit and a comparison circuit. The invention is simple to drive, and can adjust the output voltage rise time, fall time, high and low voltage duration and low voltage amplitude by setting the reference voltage signal waveform parameters, and particularly realizes the recovery and utilization of capacitive load energy by using the boosting principle. Compared with the prior art, the present invention does not require complicated charge-discharge speed calculation, has the advantages of simple control, simple structure, low system loss, low device temperature rise, high energy utilization efficiency, and high reliability, and can be applied to piezoelectric ceramic injection valves drive.

Description

technical field [0001] The invention relates to the technical field of driving power supplies, in particular to a capacitive load driving power supply and a driving method thereof. Background technique [0002] Fluid dispensing technology is a very critical technology in microelectronic packaging technology. The existing dispensing technology can be roughly divided into contact dispensing and non-contact (jetting) dispensing. The advantages of good glue consistency and other advantages have been widely used in the field of dispensing. In this dispensing method, the performance of the piezoelectric ceramic drive power is a key factor affecting the dispensing performance. [0003] Piezoelectric ceramic is a capacitive load. Most of the piezoelectric ceramic driving power in the prior art use high-voltage op amp or PWM switch to control the charging and discharging method to generate the driving voltage waveform: the driving power supply using high-voltage op amp has a voltag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/25257
Inventor 不公告发明人
Owner MORNSUN GUANGZHOU SCI & TECH
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