The design of frequency tracking control circuit in induction heating power supply based on SG3525

2016 ◽  
Author(s):  
Wu Lijuan ◽  
Li Xuesong
Keyword(s):  
Induction Heating ◽  
Power Supply ◽  
Tracking Control ◽  
Control Circuit ◽  
Heating Power ◽  
Frequency Tracking

The Application of Phase-Locked Loop Frequency Tracking in the Intelligence-Type Induction Heating Power Supply

2014 ◽  
Vol 541-542 ◽  
pp. 445-451
Author(s):  
Yan Fang Li
Keyword(s):  
Induction Heating ◽  
Power Supply ◽  
Tracking Control ◽  
Tracking System ◽  
Phase Locked Loop ◽  
Heating Power ◽  
Real Time Control ◽  
Output Frequency ◽  
Frequency Tracking ◽  
Time Control

As the induction heating power was working, its load resonant frequency constantly changes. In order to improve the efficiency of power supply, it requires that the inverter output frequency can follow changes in natural frequency of the load, namely the frequency tracking control. Aiming at the deficiency of the frequency tracking control system, this paper presents a method that the phase locked loop (PLL) tracking system works on real-time control of the output frequency of the power supply,and introduces a phase locked mathematical model which fits the inverter power supply, and offers a simulated analysis by using PSPICE. Through experiments, the system proves to be good at frequency tracking.

scholarly journals The invention relates to an intermediate frequency power supply fast start and digital phase locked loop control technology

2021 ◽  
Vol 2137 (1) ◽  
pp. 012016
Author(s):  
Demin Li ◽  
Qingliang Qin
Keyword(s):  
Induction Heating ◽  
Power Supply ◽  
Tracking Control ◽  
Control Method ◽  
Intermediate Frequency ◽  
Phase Locked Loop ◽  
Working Process ◽  
Frequency Tracking ◽  
Digital Phase ◽  
Frequency Power

Abstract Intermediate frequency induction heating is widely used because of its low energy consumption and high thermal efficiency, but the speed of traditional intermediate frequency power supply is slow and its frequency tracking accuracy is limited. In order to maintain the resonant state of the load during the working process of the induction heating power supply and realize the automatic frequency tracking control during the working process. The frequency tracking of the 40kW intermediate frequency power supply is researched, and a method of combining the resonant frequency automatic identification algorithm and the digital phase locked loop frequency tracking control method is proposed. MATLAB simulation and experiment show that the system based on this control method can save the time of searching the load resonance frequency in the initial stage of the power supply, improve the frequency tracking speed, accelerate the dynamic response speed of the system, avoid the failure of frequency lock, and play the role of fast and stable startup.

Study of Induction Heating Power Supply Based on 74HC4046

2014 ◽  
Vol 1008-1009 ◽  
pp. 663-667 ◽  
Author(s):  
Yan Cui ◽  
Xiao Jun He ◽  
Ze Ping Lin ◽  
Qing Bin Chen ◽  
Wei Hao Yang ◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Induction Heating ◽  
Power Supply ◽  
Simulation Experiment ◽  
Tracking System ◽  
Output Frequency ◽  
Phase Compensation ◽  
Frequency Tracking ◽  
Iron Load ◽  
Inverter Power Supply

According to the change of resistivity and magnetic permeability of iron load which will influence the resonance frequency in the process of induction heating, this paper presents a frequency tracking system based on the 74HC4046. It can control the output frequency of the power supply in real time, and make the power output frequency to trace the resonance frequency of load. This paper also analyses the phase compensation of the control system, and proposes a new way of phase compensation. The corresponding simulation experiment is done finally. It provides the theory basis to analyze and design an inverter power supply.

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