Damage to electronic equipment

Oct 13, 2025 by windailys.com 53 views

Harmonisa Reduction in One Phase Full Bridge Rectifier with a Passive RLC Filter: Effective Solution to Improve Power Quality

Introduction

The increasing use of electronic equipment that requires one-phase DC resources, such as laptops, PC computers, smartphones, cameras, and DC motorcycles, has led to a growing need for high-quality rectifiers. However, the use of one-phase rectifiers that are less ideal can cause serious distortion of harmonic current in one-phase power channels, especially if the number of installations is large. Harmonisa can damage electronic equipment and interfere with the performance of other electrical equipment connected to the channel. To overcome this problem, the resulting harmonisa must be below the threshold determined by international standards such as IEC-1000-3-2 and EN-61000-3-2. One effective solution to reduce harmonisa is to use a passive RLC filter with the band-pass filter technique. This filter is mounted on the rectifier and is designed to only pass the current around the fundamental frequency (50 Hz) and block the current outside the predetermined frequency band.

The Importance of Harmonisa Reduction

Harmonisa reduction is crucial in improving power quality, reducing damage to electronic equipment, and ensuring optimal performance of other electrical equipment. The use of one-phase rectifiers that are less ideal can cause serious distortion of harmonic current in one-phase power channels, leading to:

Damage to electronic equipment: Harmonisa can damage electronic equipment, such as laptops, PC computers, and smartphones, by causing overheating, overvoltage, and overcurrent.
Interference with electrical equipment: Harmonisa can interfere with the performance of other electrical equipment connected to the channel, such as motors, generators, and transformers.
Power quality issues: Harmonisa can cause power quality issues, such as voltage fluctuations, current distortions, and frequency variations, which can affect the performance of electrical equipment.

How Passive RLC Filter Works

The passive filter RLC consists of resistors (R), inductors (L), and capacitors (C) arranged in series or parallel. In the band-pass filter technique, these components are arranged in such a way that the fundamental frequency (50 Hz) can pass the filter with minimal resistance, while the higher harmonic frequency is blocked. The RLC filter works by:

Allowing the fundamental frequency to pass: The RLC filter allows the fundamental frequency (50 Hz) to pass through with minimal resistance, ensuring that the power supply is not affected.
Blocking higher harmonic frequencies: The RLC filter blocks higher harmonic frequencies, such as 2nd, 3rd, 4th, and 5th harmonics, which can cause distortion and damage to electronic equipment.

Excellence of RLC Passive Filter

RLC passive filters offer several advantages in reducing harmonisa:

*** High efficiency: ** This filter is able to reduce harmonica to 99.33%, so as to reduce the (total harmonic distortion) current from 300% to 2%. *** Relatively low cost: ** Compared to active filters, RLC passive filters generally have a lower cost. ** Easy to implement: ** Passive RLC filter installation is relatively easy, because it only requires passive components and does not require electronic control. *** High reliability: ** Passive RLC filter has a high reliability because it does not have easily damaged electronic components.

Passive RLC Filter Application

RLC passive filters can be applied to various types of one-phase full bridge rectifiers, such as:

*** Rectifier for electronic equipment: ** Like laptops, PC computers, smartphones, and cameras. *** Rectifier for DC motorcycles: ** Like DC motorcycles for industrial and household equipment. *** Rectifier for renewable energy systems: ** Like solar panels and wind turbines.

Conclusion

The use of passive RLC filters with band-pass filter techniques is an effective and efficient solution to reduce harmonics in the rectifier of one full bridge phase. This filter can improve the quality of electric power, reduce damage to electronic equipment, and ensure optimal performance of other electrical equipment. The application of RLC passive filters is an important step to build a cleaner and more environmentally friendly power system.

Future Research Directions

Future research directions in harmonisa reduction using passive RLC filters include:

Improving filter design: Improving the design of the RLC filter to achieve higher efficiency and lower cost.
Increasing filter application: Increasing the application of RLC passive filters to various types of one-phase full bridge rectifiers.
Developing new filter techniques: Developing new filter techniques, such as active filters and hybrid filters, to improve harmonisa reduction.

References

IEC 1000-3-2:2004, "Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions (equipment input current ≤ 16 A per phase)"
EN 61000-3-2:2000, "Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions (equipment input current ≤ 16 A per phase)"
IEEE 519-1992, "IEEE Recommended Practice and Requirements for Harmonic Control in Electric Power Systems"
Harmonisa Reduction in One Phase Full Bridge Rectifier with a Passive RLC Filter: Q&A

Introduction

In our previous article, we discussed the importance of harmonisa reduction in one-phase full bridge rectifiers and the effectiveness of passive RLC filters in achieving this goal. In this article, we will answer some frequently asked questions (FAQs) about harmonisa reduction and passive RLC filters.

Q: What is harmonisa and why is it a problem?

A: Harmonisa is a type of distortion that occurs in the current waveform of a one-phase full bridge rectifier. It can cause damage to electronic equipment and interfere with the performance of other electrical equipment connected to the channel. Harmonisa is a problem because it can lead to power quality issues, such as voltage fluctuations, current distortions, and frequency variations.

Q: What is a passive RLC filter and how does it work?

A: A passive RLC filter is a type of filter that consists of resistors (R), inductors (L), and capacitors (C) arranged in series or parallel. In the band-pass filter technique, these components are arranged in such a way that the fundamental frequency (50 Hz) can pass the filter with minimal resistance, while the higher harmonic frequency is blocked.

Q: What are the advantages of using a passive RLC filter?

A: The advantages of using a passive RLC filter include:

High efficiency: This filter is able to reduce harmonica to 99.33%, so as to reduce the (total harmonic distortion) current from 300% to 2%.
Relatively low cost: Compared to active filters, RLC passive filters generally have a lower cost.
Easy to implement: Passive RLC filter installation is relatively easy, because it only requires passive components and does not require electronic control.
High reliability: Passive RLC filter has a high reliability because it does not have easily damaged electronic components.

Q: Can a passive RLC filter be used in any type of one-phase full bridge rectifier?

A: No, a passive RLC filter can only be used in one-phase full bridge rectifiers that have a specific type of output waveform. The filter is designed to work with the fundamental frequency (50 Hz) and block the higher harmonic frequencies.

Q: How do I choose the right passive RLC filter for my application?

A: To choose the right passive RLC filter for your application, you need to consider the following factors:

Output waveform: The filter must be designed to work with the specific type of output waveform of your one-phase full bridge rectifier.
Harmonic frequency: The filter must be able to block the higher harmonic frequencies that are present in your application.
Power rating: The filter must be able to handle the power rating of your one-phase full bridge rectifier.
Cost: The filter must be within your budget.

Q: Can a passive RLC filter be used in conjunction with other types of filters?

A: Yes, a passive RLC filter can be used in conjunction with other types of filters, such as active filters and hybrid filters, to improve harmonisa reduction.

Q: What are the limitations of passive RLC filters?

A: The limitations of passive RLC filters include:

Limited harmonic reduction: Passive RLC filters can only reduce harmonica to a certain level, depending on the design of the filter.
Limited flexibility: Passive RLC filters are designed to work with specific types of output waveforms and harmonic frequencies.
Limited power handling: Passive RLC filters have limited power handling capabilities, depending on the design of the filter.

Conclusion

In conclusion, passive RLC filters are an effective solution for reducing harmonisa in one-phase full bridge rectifiers. However, they have limitations and must be carefully chosen and designed for specific applications. By understanding the advantages and limitations of passive RLC filters, you can make informed decisions about their use in your applications.

References

IEC 1000-3-2:2004, "Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions (equipment input current ≤ 16 A per phase)"
EN 61000-3-2:2000, "Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions (equipment input current ≤ 16 A per phase)"
IEEE 519-1992, "IEEE Recommended Practice and Requirements for Harmonic Control in Electric Power Systems"