High-accuracy self-adaptation driving power for ultrasonic transducer

A technology for driving power and transducers, which is applied to non-electric welding equipment, fluids using vibration, welding equipment, etc. It can solve problems such as peak point drift, inability to complete welding tasks, narrow bandwidth of ultrasonic transducers, etc., and achieve automatic Strong adaptability and good conversion efficiency

Inactive Publication Date: 2006-05-10
THE 45TH RES INST OF CETC
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  • Abstract
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Problems solved by technology

[0003] In the above process, in addition to the quality factor of the transducer itself, the conversion efficiency of ultrasonic energy into mechanical energy through the transducer is the key technology that determines whether the welding can be successful, and the bandwidth of the resonant frequency of the ultrasonic t

Method used

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  • High-accuracy self-adaptation driving power for ultrasonic transducer

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Embodiment Construction

[0031] Examples see figure 1 , high-precision self-adaptive ultrasonic transducer driving power consists of a DSP-based processor circuit 1, a multi-channel high-speed D / A converter circuit 2, a multi-channel high-speed A / D converter circuit 3, a digital and analog compatible A phase-locked loop circuit 4, an adder circuit 5, a high-precision broadband voltage-controlled oscillator circuit 6, a phase detector circuit 7, a power amplifier circuit 8, an output current detection circuit 9, a micro-current detection circuit 10 , an output voltage detection circuit 11 and a high-speed serial communication interface circuit 12 and so on.

[0032] The high-precision self-adaptive ultrasonic transducer drive power supply of the present invention has a drive capability within a bandwidth of 100kHz (50kHz to 150kHz), and an output power of 5W.

[0033] Work process of the present invention is:

[0034] After power-on, the DSP processor circuit 1 initializes the original parameters of ...

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Abstract

Disclosed a high-accurate self-adapting ultrasonic energy converter driving power, comprises a processing circuit based on DSP, a multi-path high-speed /DA converter circuit, a multi-path high-speed A/D converter circuit, a digital-analogue phase-lock loop, a accumulator circuit, a high-accurate broad band voltage-controlled oscillator circuit, a phase detector circuit, a power amplifier circuit, a output current detecting circuit, a micro-current detecting circuit, a output voltage detecting circuit, and a interface circuit. The invention has the ability to control program with self-adapting servo-algorism, which can trace the working condition of energy converter in time, and process the feedback information to compensate and modify the energy of ultrasonic energy converter, which can meet the energy converters with different types without changing parameters of hardware, to realize best condition of transformation efficiency of ultrasonic energy converter.

Description

technical field [0001] The invention relates to an ultrasonic transducer drive power supply. Background technique [0002] In wire bonding equipment, ultrasonic bonding is the most basic and common method. The energy of the ultrasonic wave is converted into mechanical energy through the transducer, that is, the ultrasonic energy is applied to the piezoelectric ceramic chip of the transducer to vibrate, and is transmitted to the rivet vertically installed on the top of the horn through the horn, so that the tip generates Mechanical vibration of a certain amplitude. This mechanical energy promotes the formation of a clean interface between the two metals under its action and the mutual diffusion and welding together. In wire bonding equipment, this principle is used to bond metal leads such as gold, aluminum or copper wires to the pad metal layer. [0003] In the above process, in addition to the quality factor of the transducer itself, the conversion efficiency of ultrason...

Claims

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Application Information

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IPC IPC(8): B23K20/10B06B1/06
Inventor 张琦姚爱民
Owner THE 45TH RES INST OF CETC
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