Toroidal Transformers

The Toroidal Advantage

Toroidal transformers are often preferred over laminated transformers for several key reasons related to performance, efficiency, and space considerations.

Here's why a toroidal transformer might be chosen instead of a laminated transformer:

1. Higher Efficiency and Lower Losses

Toroidal transformers typically have lower core losses. Their circular core design ensures a more uniform magnetic flux distribution, which reduces eddy current losses and hysteresis losses in the core material.

2. Improved Magnetic Efficiency

Toroidal transformers generally exhibit better magnetic coupling and reduced flux leakage, leading to improved magnetic efficiency. This means that less energy is wasted in the form of stray magnetic fields.

3. Lower Weight for the Same Power Rating

Toroidal transformers are usually lighter for the same power rating because of the way the core is wound and how it minimizes material usage. This can be especially beneficial in applications where weight is a consideration (e.g., portable devices or power supplies).

4. Better Thermal Performance

Because of the uniform flux distribution, toroidal transformers generally produce less heat and are better at dissipating heat compared to laminated transformers. The continuous, uninterrupted magnetic path helps avoid hotspots, contributing to longer life and more reliable operation.

5. Lower Audible Noise

Toroidal transformers tend to be quieter than laminated transformers. The magnetic flux is more evenly distributed in the toroidal core, which minimizes vibration and audible hum. This makes toroidal transformers ideal for sensitive or noise-critical applications.

6. Compact and Space-Efficient Design

As the overall efficiency of this type of transformer is better than a laminated version, they can be designed on a smaller foot print.

The main benefits summarized:

• Easy to mount
• Low mechanical hum
• Flexible dimensions
• Small size and weight
• Low magnetic strayfield levels

Applications

Toroidal transformers have a wide range of application, including:

• Audio Transformers
• Power Transformers
• Mains Transformers
• Matching Transformers
• Isolation Transformers

Custom Design

Power rating (VA) and voltages according to customer's specification.

• Power rating (VA)
• Number of tappings
• Fixation method
• Wire length (Standard length 300mm)

Power Rating

• Single Phase: 10VA - 15000VA
• Three Phase: Up to 50 KVA

Mounting Options

Standard Mounting Kit

Each transformer is supplied with a mounting kit consisting of a clamping disc and two rubber washers, complete with nut and screw. The toroid is sandwiched between the rubber washers providing an economical and vibration dampened assembly.

Centre-Potted with Insert

An insert is placed in the centre of the core, which is then resined. Mounting is done with a screw and nut.

Data Chart

Power Rating, measured in VA (Volt Amps), is calculated as Voltage * Amps.
For example: 10 VA = 5V * 2A.