Braking Resistors
Safely dissipating energy during drive braking
What is a braking resistor?
The main function of a braking resistor is to safely dissipate excess energy from electric drives. They absorb surplus electrical energy and convert it into heat in a controlled manner, thereby protecting sensitive electronic components from overload or damage.
Braking resistors enable safe, fast, and reliable braking without feeding energy back into the power grid. Typical applications include elevators, crane systems, machine tools, and conveyor belts – anywhere precise and rapid stopping of motion is essential.
With over 100 years of experience in the development and manufacturing of power resistors, FRIZLEN stands for uncompromising quality, flexibility, and technical expertise – Made in Germany.
Braking resistors in elevator systems – Safety on every ride
In modern elevator systems, reliable braking is crucial for safety and ride comfort. When the cabin is lowered, the drive goes into generative operation and feeds energy back into the converter's intermediate circuit. This excess energy must be dissipated to prevent overload or malfunction.
Braking resistors convert the regenerated energy into heat, ensuring controlled stops – even during emergency braking or power failures. They are especially critical in frequency-controlled drive systems. FRIZLEN offers compact, high-performance solutions for this purpose – such as the T300 series, which is ideal for integration in elevator shafts or machine rooms.
Braking resistors in wind turbines – Safely dissipating energy during load changes
In wind turbines, dynamic operating conditions – such as rotor braking or rapid load changes – can lead to electrical overvoltages that cannot be fed back into the grid. Braking resistors ensure safety by converting this excess energy into heat in a controlled manner, thereby protecting the sensitive power electronics.
A typical example is the use of compact flat resistors from FRIZLEN’s T300 series. These encapsulated resistors are ideal for integration into the confined machine rooms of modern wind turbines. With high thermal load capacity, protection ratings up to IP67, and optional multi-unit configurations, they meet all the requirements for harsh outdoor environments – reliable, durable, and low-maintenance.
Braking resistors in crane systems – for safe lifting and lowering
When lowering heavy loads in crane systems, kinetic energy is generated and converted into electrical energy by the drive. This energy must be dissipated in a controlled manner to prevent damage to the electronics. Braking resistors perform this task precisely, ensuring safe and smooth deceleration of crane movements – even during emergency stops or sudden changes in direction.
Without braking resistors, there is a risk of uncontrolled motion, which can endanger both people and equipment. That’s why braking resistors are an essential component in every modern crane system, enabling precise and safe load handling.
Braking resistors in machine tools – for precise stops at short intervals
In machine tools, rotating axes, spindles, or feed drives often need to be stopped within milliseconds – for example, during tool changes or safety shutdowns. This generates electrical energy that cannot be fed back into the grid. Braking resistors dissipate this energy in a targeted manner, converting it into heat. Braking resistors enhance operational safety, protect the electronics, and ensure maximum process accuracy – with every stop.
Braking resistors in high-bay warehouses – precise movements in confined spaces
In automated high-bay warehouses, storage and retrieval machines move at high speeds in vertical and horizontal directions. When braking these movements, regenerative energy is generated that must be controlled and dissipated. Braking resistors reliably convert this energy into heat, protecting frequency converters and drive technology from overload.
Especially in case of frequent start-stop cycles, they ensure precise, safe stopping of loads – without unintended coasting. This improves positioning accuracy, reduces wear, and improves process reliability. FRIZLEN offers compact, high-performance braking resistors with high thermal capacity – ideal for continuous operation in intralogistics.
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Braking resistors in stage technology – silent safety behind the scenes
In stage and event technology, scenery, lighting rigs, and lifting platforms often move with precision and almost silently. When braking these drives, regenerative energy is generated, which must be safely dissipated – without noise or disruption to the performance.
Braking resistors reliably handle this task. The FRIZLEN T500 series lamina type fixed resistors have proven particularly effective. They feature a robust design and excellent heat dissipation – combined with low-vibration, noise-reduced operation.
Thanks to flexible connection options and a compact form factor, these resistors can be easily integrated into stage drive systems. Ideal for theaters, studios, and event venues – anywhere quiet operation and high operational safety are essential.
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