Intelligent frequency tracking phase control circuit

Abstract

The invention discloses an intelligent frequency tracking phase control circuit, and relates to the technical field of frequency tracking. The control circuit comprises a sampling module, an information conditioning module, a main control module, a frequency tracking protection module and a switch control module. The sampling module is used for sampling voltage and current signals output by electric equipment, the information conditioning module is used for converting and shaping the voltage and current signals, and the main control module is used for generating voltage and current phase difference signals, searching the working frequency of the electric equipment, automatically tracking the frequency. generating a non-PWM wave control circuit and detecting and protecting the switch control module. According to the intelligent frequency tracking phase control circuit, sampling of output current and voltage signals is optimized, conversion and shaping of the current and voltage signals are enhanced, frequency searching and tracking are achieved based on a current maximum value frequency searching method and phase difference detection, real-time detection of the frequency is enhanced, and the output frequency can be automatically adjusted to improve the working efficiency.

Description

technical field [0001] The invention relates to the technical field of frequency tracking, in particular to an intelligent frequency tracking phase control circuit. Background technique [0002] With the rapid development of science and technology, digital processing technology has also been improved, and electrical equipment is constantly updated and optimized. In the process of working with electrical equipment, in order to better cooperate with each The frequency of the control switching power supply is automatically adjusted to adapt to the change of the frequency of the electrical equipment, that is, to realize automatic frequency tracking, because in the electrical equipment, such as the induction heating power supply or the power supply frequency of the load will change with the influence of external factors, resulting in The electrical equipment no longer works at the resonance point, which leads to a decrease in work efficiency, aggravates the damage to the electric...

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Problems solved by technology

[0002] With the rapid development of science and technology, digital processing technology has also been improved, and electrical equipment is constantly updated and optimized. In the process of working with electrical equipment, in order to better cooperate with each The frequency of the control switch power supply is automatically adjusted to adapt to the change of the frequency of the electrical equipment, that is, to realize automatic frequency tracking, because in the electrical equipment, such as the induction heating power supply or the power supply frequency of the load will change with the influence of external factors, resulting in The electrical equipment no longer works at the resonance point, which leads to a decrease in work efficiency, aggravates the damage of the electrical equipment, and reduces its service life. In the existing frequency tracking circuit, in the process of frequency tracking, the inaccurate sampling accuracy leads The matching ability is low, which often leads to unsuccessful matching and there is no corresponding protection measure to cause the circuit to heat up or even burn out, and the parameters in the circuit often change, so the output frequency can be automatically adjusted to adapt to the change of parameters. It is necessary to achieve similar frequency resonance, improve work efficiency and work stability, and most of the frequency tracking phase controllers have low applicability, and cannot realize the frequency tracking function for different electrical equipment

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