Research on Frequency Tracking Capacitive PWM of Induction Heating Power Supply

2010 ◽  
Author(s):  
Qinghua Xiao ◽  
Jie Zhao ◽  
Mingfa Wang
Keyword(s):  
Induction Heating ◽  
Power Supply ◽  
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.

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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