400 Hz Power Transformers
Last Updated: April 1, 2025
Description
400 Hz power transformers are specialized electrical devices designed to increase or decrease line voltages at a frequency of 400 Hz. They are used to transform alternating current (AC) voltages to different levels, ensuring that the output voltage is suitable for the intended application.
Working Principle
400 Hz power transformers operate on the principle of electromagnetic induction, where power is transmitted from one electrical circuit to another through mutual induction. The primary and secondary coils are magnetically linked but not electrically connected, allowing the transformer to change voltage levels while maintaining a constant frequency. The 400 Hz frequency is particularly useful because it allows for smaller and lighter transformers compared to those operating at lower frequencies, making them ideal for applications where space and weight are critical factors.
Applications
400 Hz power transformers are commonly used in aerospace and military applications due to their compact size and lightweight nature. For example, they are integral in aircraft electrical systems, where they help manage power distribution efficiently. They are also used in naval ships and submarines, where space is limited, and weight savings are crucial.
Advantages over other Power Transformers
One of the primary advantages of 400 Hz power transformers over those operating at lower frequencies is their reduced size and weight. This makes them particularly advantageous in applications where space and weight are at a premium, such as in aircraft and other transportation systems. Additionally, the higher frequency allows for more efficient power conversion and reduced core losses, which can lead to improved performance in specific applications.
Limitations
Despite their advantages, 400 Hz power transformers have limitations, including higher operating costs due to the need for specialized materials and manufacturing techniques. They may also generate more heat compared to lower frequency transformers, which can necessitate additional cooling measures. Furthermore, their use is generally limited to specific applications where their benefits outweigh these drawbacks.
Considerations
When considering the use of 400 Hz power transformers, it is important to evaluate initial costs, which can be higher due to the specialized nature of these devices. Operating expenses may also be elevated due to potential cooling requirements and the need for maintenance to ensure optimal performance. Durability and accuracy are generally high, but regular maintenance is crucial to prevent issues related to overheating and to extend the transformer's lifespan. Replacement and maintenance costs should be factored into the overall cost of ownership, especially in applications where reliability is critical.
from Hammond Manufacturing Company Inc.
Features. Primary 115 VAC, 60 or 400Hz. models, 3 case sizes. Epoxy cast to withstand shock and severe environments. Two coil design provides balanced windings and low magnetic radiation - no electrostatic shield required. 228 series include four, 6-32 X .38 machine screw inserts for less strain on... [See More]
- Primary Frequency: 400
- Output Voltage: 10
- Transformer Type: Encapsulated Coil Transformer; Electronics; Power Transformer
- Power Rating (VA): 20
from Standex-Meder Electronics
400 Hz Power Transformers 1.5 VA to 9 VA are miniature encapsulated toroidal transformers designed to meet the requirements of Mil-PRF-27/37 through /47. 308 standard designs from 1.5VA through 25 VA. A wide variety of output voltages offer maximum design flexibility. Contact Standex-Meder for your... [See More]
- Primary Frequency: 400
- Power Rating (VA): 1.5 to 9
from Abbott Technologies, Inc.
60 Hz Industrial Transformers. • High efficiency, excellent regulation and high isolation. • Widely used in custom power supplies and industrial power controls. • 10 VA to 1300 V A [See More]
- Primary Frequency: 50 Hz; 60 Hz; 400; 50-65 Hz
- Mounting: Chassis
- Transformer Type: Single Phase Transformer
- Input Voltage: 115 to 230
from Data Device Corporation (DDC)
Beta has been manufacturing transformers for nearly 20 years, developing an expertise unmatched for producing low-to medium-power transformers. Whether you require a transformer for a medium-power, switching power supply or a simple reference transformer for a synchro/resolver circuit, Beta can... [See More]
- Primary Frequency: 400
- Mounting: Surface Mount
- Transformer Type: Power Transformer
- Construction: Toroidal Core
from Standex-Meder Electronics
400 Hz Power Transformers 16 – 25 VA are miniature encapsulated toroidal transformers designed to meet the requirements of Mil-PRF-27/37 through /47. 308 standard designs from 1.5VA through 25 VA. A wide variety of output voltages offer maximum design flexibility. Contact Standex-Meder for... [See More]
- Primary Frequency: 400
- Power Rating (VA): 16 to 25
from Abbott Technologies, Inc.
60 Hz MIL-PRF-27F Power Transformers. • Military Designation No. TF4SO3. Environment: Encapsulated to meet MIL-STD-810 for vibration, shock, acceleration, sand, dust, humidity, saltspray, fungus, sunshine, rain, explosion, and altitude (to a vacuum). NOTE: For high altitude operation,... [See More]
- Primary Frequency: 50 Hz; 60 Hz; 400; 50-65 Hz
- Input Voltage: 115 to 230
- Transformer Type: Single Phase Transformer
- Output Voltage: 5 to 120
from Data Device Corporation (DDC)
Meets MIL-T-27 grade 6, 115V input, 13V output [See More]
- Primary Frequency: 400
- Mounting: Frame/PCB Bobbin
- Transformer Type: Reference Transformer
- Construction: Toroidal Core
from Abbott Technologies, Inc.
400 Hz Power Toroid Transformers. • Designed for 400 Hz operation. • More VA per size and weight than conventional power transformers. • Military Designation No. TF5S03ZZ. • Industrial style also standard [See More]
- Primary Frequency: 400
- Input Voltage: 115 to 230
- Transformer Type: Single Phase Transformer
- Output Voltage: 5 to 115
from Data Device Corporation (DDC)
These transformers are designed and built to meet the ruggedized requirements of MIL-PRF-27 for use in high reliability Aerospace, Military, and Extreme Industrial control systems. Typical applications are Motor control, Radar antenna positioning, Machine Tool control, Robotics, and Process control,... [See More]
- Primary Frequency: 400
- Mounting: PCB/SMD
- Transformer Type: Reference Transformer
- Construction: Toroidal Core
from Abbott Technologies, Inc.
400 Hz MIL-PRF-27F Power Transformers. Environment: Encapsulated to meet MIL-STD 810, including vibration, shock, sand, dust humidity, saltspray, fungus, sunshine, rain, explosion, and altitude (to a vacuum). NOTE: For high altitude operation, encapsulate terminals. [See More]
- Primary Frequency: 400
- Mounting: Insert Mounting
- Transformer Type: Single Phase Transformer
- Input Voltage: 115 to 230
from Abbott Technologies, Inc.
400 Hz MIL-PRF-27F Power Transformers. Military Designation No. TF5S03ZZ. Encapsulated, rugged MIL-PRF-27F* transformers. Capable of operation at high temperatures. For airborne, missile and space applications [See More]
- Primary Frequency: 400
- Mounting: Thru-Hole Mount
- Transformer Type: Single Phase Transformer
- Input Voltage: 115
from Abbott Technologies, Inc.
400 Hz MIL-PRF-27F Toroid Transformers. • Military designation TF5S03ZZ. • Standard output voltages 5 to 300 volts. • Compact toroidal construction in a convenient printed-circuit mount package. • Low outgassing molded construction for high-altitude operation. • Power levels... [See More]
- Primary Frequency: 400
- Mounting: PCB/SMD
- Transformer Type: Single Phase Transformer
- Input Voltage: 115
from Abbott Technologies, Inc.
P. C. B. pin mounting. High quality industrial grade. Low profile, small size. No cost custom modification. UL\VDE\CSA\TUV models available [See More]
- Primary Frequency: 50 Hz; 60 Hz; 50 / 60 Hz; 400; 50-400 Hz
- Mounting: PCB/SMD
- Transformer Type: Single Phase Transformer
- Input Voltage: 115 to 230
from Abbott Technologies, Inc.
400 Hz 3 Phase MIL-PRF-27F Power Transformers. Military Designation No. TF5S03ZZ (Sizes 1 through 6). Military Designation No. TF5S03YY (Sizes 7 through 10). Designed to meet the light weight and high temperature requirements of airborne, shipboard, and military electronics. DELTA or WYE selectable... [See More]
- Primary Frequency: 400
- Mounting: Insert Mounting
- Transformer Type: Three Phase Transformers
- Three Phase Configuration: Delta/Delta; Wye/Wye