Eddy current retarders for dynamometers
We are the worldwide reference brand in eddy current retarders known as power absorber units for any type of power dynos. Most manufacturers choose the FRENELSA brand for its reliability, safety and repeatability to carry out their tests. More than 50 years of experience support us.
Adaptation and customization
We manufacture a wide range of retarders to carry out any type of test, fully adapted to the needs of each customer.
Long shafts
We manufacture long shafts tailored to each customer, both in length and in diameter and design, with splines, keyways, holes, etc.

Setting
For all types of voltages: 12V, 24V, 36V, 48V, 72V, 96V, 192V and the possibility of installing temperature probes for monitoring and control.


Chassis dyno

Engine/Transmission dyno

Towing dyno

Hub dyno

Agricultural dyno
Why a Frenelsa retarder?
What type of current does it work with?
Direct Current.
How is it controlled?
It is controlled by varying the applied voltage.
Can it work continuously?
Yes. As long as the sizing is adequate.
Does it suffer any wear?
No. Being electromagnetic brakes, there is no friction or wear.
Does it need maintenance?
Our brakes do not require maintenance, because we use top quality bearings with high-performance greases.
What advantages does it have over other systems?
- Quickly reaches the requested torque.
- High torque at low revs.
- Easy to control via PC.
- Allows simulation tests to be carried out.
- Simple and economical installation.
Does FRENELSA help me with transportation, customs, insurance, etc.?
We ship our products all over the world and we have extensive experience in all transport, customs and insurance procedures. Our commercial department is in charge of the entire process until the products arrive at the customer’s home.
FRENELSA
Request quotation
Provide us with the details of your application and we will recommend the solution that best suits your needs.