Torque Limited Permanent Magnetic Coupling for Motor Protection and Energy Saving

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Torque Limited Permanent Magnetic Coupling for Motor Protection and Energy Saving  Item No. HS-LMC  series

Product introduction:

The permanent magnet coupling is also known as permanent magnet coupling.It is mainly composed of copper rotor、permanent magnet rotor and controller three parts.In general, the copper rotor is connected with the motor shaft, the permanent magnet rotor is connected with the shaft of the working machine, and there is an air gap (called an air gap) between the copper rotor and the permanent magnet rotor, and there is no mechanical connection to transmit torque.In this way, a soft magnetic connection is formed between the motor and the working machine, and the torque and speed of the working machine shaft are changed by adjusting the air gap.Due to the different air gap adjustment methods, the permanent magnet eddy current transmission device is divided into standard type, delay type, limited moment type, speed regulation type and other different types.

Product characteristics：

1. Energy-saving effect: 25%~66%

2. Maintenance workload is small, almost maintenance-free products and maintenance costs are very low.

3. The power transmission torque limited magnetic coupling allows a large installation alignment error (up to 5mm), greatly simplifying the installation and commissioning process.

4. The Torque limited magnetic coupling has an overload protection function, which improves the reliability of the entire system and completely eliminates the damage caused by the overload of the system. Magnetic Couplings Co-Axial Type Metric

5. The power transmission torque limited magnetic coupling improves the motor’s starting capacity, reduces shock and vibration, and coordinates the load distribution of multi-machine drives.

6. The magnetic coupling has a long service life and a design life of 30 years. And it can extend the service life of the parts in the system.

7. The power transmission torque limited magnetic coupling is easy to achieve remote control and automatic control, and the process control is highly accurate.

8. The magnetic coupling is simple in structure and can adapt to a variety of harsh environments. It is very friendly to the environment and does not produce pollutants and harmonics. The coupling is small in size and easy to install

Product application scope：

The permanent magnetic coupling is mainly used in various types of fans, pumps, material conveyors, bucket elevators, ball mills, winches, crushers, agitators, stranding machines and other mechanical equipment.  High-torque Axial Flux PM Coupling

How Torque Limiting Couplings Work
To understand their function, think of a car’s clutch. When the engine stalls, the clutch slips, sparing the crankshaft from snapping. Torque limiters operate on a similar principle but with far greater precision. For instance, a common design uses stacked friction plates—much like those in a motorcycle clutch—paired with springs that maintain pressure. At a bottling plant I visited, the couplings were calibrated to slip at 50 Nm, ensuring smooth operation under normal conditions while protecting the machinery during jams. Torque Limited Magnetic Coupling

Real-World Applications and Protection
The value of torque limiting couplings becomes even clearer in high-stakes environments. Take wind turbines, for example. A sudden gust of wind could wreak havoc on the gearbox, but a well-designed coupling slips first, absorbing the excess force. Vestas, a leading wind turbine manufacturer, reports that these couplings prevent 73% of potential gearbox failures. Maintenance crews at a Texas wind farm shared that before installing advanced torque limiters, they replaced gearboxes annually. Now, the same gearboxes last five years or more.

Key Specifications at a Glance
For a standard 100mm magnetic coupling, the numbers speak for themselves:
Handles up to 800 Nm torque
Reacts in under 0.1 seconds
Costs ~$350 (versus thousands in potential repairs)  Magnetic Couplings Disc Type Metric
Endures 5 million cycles