The EMP powder reacts to the variation of a magnetic field generated by an electro-magnetic coil.

Varying the powder ‘viscosity’ leads to the control of the torque transmission between the primary and secondary rotors.

When the secondary rotor is fixed to the equipment frame, the device is acting as a brake, otherwise it is acting as a clutch.

MEROBEL EMP brake offers a compact design (ratio of torque vs unit size is very dense compared to other technologies), little to no maintenance (by design), and very quick response times (10 to 50 ms).

In conjunction with a measurement and control systems (depending on the levels of precision required), EMP brakes can constitute the core elements of test benches.

The technology produces a reliable, reproducible torque via a current regulated 24V power supply or can also be monitored with a PID controller for a closed loop solution.

The extensive range of standard brakes provides a tailored solution for a wide spectrum of test requirements

Combining the brake with our torque sensor results in a highly compact solution with direct mounting of the sensor or integration via an adapter plate.

test bench designers can also call on the expertise of the REDEX technical teams to improve the cost effectiveness of their equipment. Our engineering department can utilize the latest simulation software needed to evaluate the overall heat dissipation for our customer’s application. 

There are several types of test benches:

- The first type is the one used during the development phase. The objective here is to simulate the operating conditions in a laboratory, with as much similarity as possible to the conditions set out in the specifications.

- The second type is an endurance bench to prove the component design over time, while optimizing the final design during the manufacturing phase. 

- The third type are the test benches needed during the production phase.

This is done to integrate test systems in the manufacturing lines to guarantee the specifications for quality management. DG-BLOCK controllers particularly fit these applications with the ability to handle multi-stands processes.

Regarding production of actuators and components for mechanical drive systems, the aim is usually to simulate the system load cycles, with repeated cycles of variable torque levels that reproduce as closely as possible the stresses experienced during system service life. In the motor vehicle field, for example, the tests can be used to simulate shocks on steering columns to simulate a vehicle going over a pothole, hitting a curb, or undergoing emergency braking. Moving beyond vehicle drive systems, we can also mention the elements used to control steering (steering columns and electrical power steering units, etc.), and accessories such as starter motors, ventilation systems, and other electric motors (wind shield wipers, power windows, side view mirror adjustment, seat adjustment, etc.).

To effectively perform simulation operations, test benches must support an exceptionally wide range of capabilities—with torque requirements from 0.05 to 1000 Nm and speeds from 10 to 3000 rpm.

Redex USA Inc. delivers a smart, versatile, and cost-effective solution designed to meet the full spectrum of test bench requirements—making advanced performance more accessible than ever.