Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Frequency tracking circuit structure in ultrasonic power

A technology of frequency tracking and circuit structure, applied in the direction of electrical components, automatic control of power, etc., can solve the problems of difficult realization and adjustment of phase-shifting circuits, etc.

Inactive Publication Date: 2008-03-19
JIANGSU WELM TECH
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of circuit structure is difficult to realize the phase shifting circuit when the ultrasonic frequency is tens of kHz, and it is more difficult to adjust

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Frequency tracking circuit structure in ultrasonic power
  • Frequency tracking circuit structure in ultrasonic power

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Below the present invention will be further described in conjunction with the embodiment in the accompanying drawing:

[0018] As shown in Figure 2: the present invention adopts current transformer to be connected with the input end of the first band-pass filter circuit; Described current transformer output current signal is sent into the first band-pass filter, and the output terminal of the first band-pass filter circuit is connected with the first band-pass filter circuit The input end of the first comparison shaping circuit is connected; the first bandpass filter is filtered and then input to the first comparison shaping circuit, and the output end of the first comparison shaping circuit is connected to the input end of the first frequency division circuit; the first comparison shaping circuit The shaped current signal is sent to the first frequency division circuit for frequency division processing, and the output terminal of the first frequency division circuit is ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a frequency tracking circuit structure for an ultrasonic power supply, specifically, which is used for ultrasonic screening, ultrasonic plastic welding, ultrasonic metal welding, ultrasonic machining and other application domains. The frequency tracking circuit comprises a current transformer, a photocouping voltage sampling circuit, a first bandwidth limited circuit, a second bandwidth limited circuit, a first comparing and shaping circuit, a second comparing and shaping circuit, a first frequency dividing circuit with output terminal connected with the input terminal of a phase-detecting circuit, and a second frequency dividing circuit with output terminal connected with the input terminal of the phase-detecting circuit, wherein the output terminal of the phase-detecting circuit is sequentially connected with a low-pass filter circuit, a voltage current switching circuit, and a voltage-controlled oscillation frequency control circuit. The invention uses frequency dividing circuit, so that when operating at resonant frequency, the voltage and current in transducer circuit are at the same state, thereby achieving the purpose of automatic frequency tracking.

Description

technical field [0001] The invention relates to a frequency tracking circuit structure in an ultrasonic power supply, in particular to the application field of ultrasonic screening, ultrasonic plastic welding, ultrasonic metal welding, ultrasonic processing and other power ultrasonic applications. Background technique [0002] In the prior art, the frequency tracking circuit used in ultrasonic screening, ultrasonic plastic welding, ultrasonic metal welding, ultrasonic processing and other ultrasonic power supplies mainly uses current transformers to connect bandpass filter circuits, comparison shaping circuits, and phase shifting circuits in sequence through wires. The circuit is connected to the phase-locked loop circuit; the voltage sampling circuit is sequentially connected to the filter circuit and the comparison shaping circuit through wires, and the comparison shaping circuit is connected to the phase-locked loop circuit. When the ultrasonic frequency of this kind of c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H03L7/08H03L7/18
Inventor 李英汪航
Owner JIANGSU WELM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com