What is the reason for the large and heavy size of microwave transformers?

Encyclopedia
11/15/2024

The main reasons for the large size and heavy weight of microwave transformers include the following aspects:

Frequency Characteristics:

Microwave frequencies typically operate in the GHz range, much higher than the power frequency (such as 50Hz or 60Hz) used in traditional transformers. To function effectively at these high frequencies, microwave transformers require special materials and designs to reduce losses and improve efficiency. These specialized designs often lead to larger sizes.

Core Materials:

The core materials used in microwave transformers usually have high permeability and low loss to accommodate high-frequency operation. These materials may be more expensive and heavier than the ferrites or silicon steel sheets used in traditional transformers. For example, microwave transformers often use ferrites or amorphous alloys, which are denser but offer superior performance.

Heat Dissipation Requirements:

Operating at high frequencies generates more heat, so microwave transformers need better cooling designs. This may include larger heat sinks, fans, or other cooling mechanisms, thereby increasing the size and weight of the transformer.

Structural Strength:

At high frequencies, the rapid changes in electromagnetic fields can produce significant mechanical stress. To ensure the structural stability and reliability of the transformer, additional mechanical support and reinforcement measures are required, which also increases the size and weight.

Capacitive Effects:

At high frequencies, parasitic capacitance between windings significantly affects the performance of the transformer. To reduce these parasitic capacitances, the spacing between windings needs to be increased, which also increases the overall size of the transformer.

Shielding and Isolation:

Microwave transformers require good electromagnetic shielding and isolation to prevent electromagnetic interference and leakage. This often involves adding extra shielding layers and isolation materials, further increasing the size and weight of the transformer.

In summary, the large size and heavy weight of microwave transformers are due to the need to operate efficiently at high frequencies while meeting requirements for heat dissipation, structural strength, capacitive effects, and shielding and isolation.

Encyclopedia

The Electricity Encyclopedia is dedicated to accelerating the dissemination and application of electricity knowledge and adding impetus to the development and innovation of the electricity industry.

In which directions will dry-type transformers develop in the future?
In which directions will dry-type transformers develop in the future?
By Echo, 12 Years in the Electrical IndustryHi everyone, I'm Echo, and I've been working in the electrical industry for 12 years.From my early days doing commissioning and maintenance in distribution rooms, to later participating in electrical system design and equipment selection for large-scale projects, I’ve witnessed how dry-type transformers have evolved from traditional tools into smarter, greener devices.Recently, a new colleague asked me:“What’s the current state of dry
Echo
07/02/2025
Installation and Commissioning of 10kV Dry-Type Transformers
Installation and Commissioning of 10kV Dry-Type Transformers
By James, 10 Years of Electrical Equipment Maintenance ExperienceHi everyone, I’m James, and I’ve been working in electrical equipment fault repair for 10 years.Over the past decade, I’ve worked in factories, substations, and distribution rooms of all sizes, involved in the installation, commissioning, maintenance, and troubleshooting of dry-type transformers. Dry-type transformers are among the most common electrical devices we deal with on a daily basis.Today, a new colleague
James
07/01/2025
What are the reasons for low insulation at the low-voltage side of a dry-type transformer?
What are the reasons for low insulation at the low-voltage side of a dry-type transformer?
Hi everyone, I’m Felix, and I’ve been working in electrical equipment fault repair for 15 years.Over these years, I’ve traveled across factories, substations, and distribution rooms all over the country, troubleshooting and repairing all kinds of electrical equipment. Dry-type transformers are among the most common devices we deal with.Today, a friend asked me:“What does it mean when the low-voltage side of a dry-type transformer has low insulation resistance?”Great
Felix Spark
07/01/2025
What tests are required for dry-type transformers?
What tests are required for dry-type transformers?
1 Pre - commissioning InspectionAs a front - line tester, before formally commissioning a dry - type transformer, I need to carry out a comprehensive and systematic inspection. First, I conduct a visual inspection of the transformer body and its accessories, carefully checking for mechanical damage or deformation. Then, I check whether the leads of the high - and low - voltage windings are firmly connected and whether the bolt tightening torque meets the standard requirements (usually 40 - 60N&m
Oliver Watts
07/01/2025
Inquiry
Download
Experts Electrical is dedicated to serving the personnel in the global power industry.
Join Experts Electrical, not only can you discover power equipment and power knowledge, but also canhnd like - minded friends!