Abstract : This paper discusses the application of a simple single-phase frequency converter in residential ventilation fans, electric curtains, etc., and introduces the working principle, advantages, and disadvantages of the simple single-phase frequency converter. Keywords : Simple single-phase frequency converter; residential; application I. Introduction With the development of technology, people have increasingly higher requirements for the comfort and functionality of their homes. The function of a home has expanded from simply meeting the residents' living needs to include entertainment, leisure, and work. Systems such as home automation and smart homes that can meet residents' needs have also begun to emerge and develop. How to reflect residents' requirements for comfort and convenience in their homes, and how to control the electrical appliances/equipment inside the home, are issues we are increasingly concerned about. The control of electrical appliances in the home, such as electric fans, ventilation fans, electric doors, and electric curtains, is particularly important. Traditional control methods, such as direct drive, are widely used to achieve the control of these loads. However, due to the limitations of traditional methods in energy saving and noise reduction, we have begun to consider whether there are better control methods. Frequency conversion control has made encouraging progress in AC speed regulation due to its inherent advantages, and single-phase frequency converters, due to their simplicity and ease of implementation, have become the focus of this paper. [b]II. Simple Single-Phase Frequency Converter 1. Overview[/b] Frequency conversion and voltage regulation for speed control are widely used in three-phase asynchronous motor speed control systems. When regulating motor speed, it is generally desirable to keep the magnetic flux per pole constant. If the magnetic flux is too weak, the motor core is not fully utilized, which is wasteful; if the magnetic flux is excessively increased, the core will saturate, leading to excessive excitation current, which can damage the motor due to overheating of the windings. In AC asynchronous motors, the magnetic flux is generated by the synthesis of the stator and rotor magnetomotive forces. How can we maintain a constant magnetic flux? [b][align=center]For details, please click: Application of Simple Single-Phase Frequency Converters in Residential Buildings[/align][/b]