Prior to starting the tested machinery, the electric eddy current brake control unit should be set to constant current control, with the set value at 0. At this point, the excitation current of the electric eddy current brake is zero, allowing the tested machinery to start under near-zero load conditions.

2. Open the inlet valve, allowing cooling water to enter the cooling channel of the eddy current brake. It then circulates through the drain pipe of the brake and the cooling system, reusing it in the reservoir. The eddy current brake must be under a state of cooling water to be loaded; otherwise, it will be destroyed.

The tested mechanical drive was initiated to rotate the main shaft of the eddy current brake at the same speed. The lubricant and coolant were checked for proper flow, and after the power mechanicals were running, the loading test could be conducted. (Not opening the water valve or the flow switch contact point would prevent the excitation current from being applied.)

The control unit adjusts its controls and setpoints based on the tested machine's range, allowing the electrodynamic eddy current brake to automatically follow the excitation current's magnitude, changing the load to perform energy absorption and measurement. The entire regulating control circuit is a complete closed-loop automatic regulating system. The actual speed (or torque) of the electrodynamic eddy current brake is compared with the adjustable setpoint (voltage), and the difference, after PID amplification, is automatically adjusted to the excitation current according to the selected control mode. This modifies the speed (or torque) of the electrodynamic eddy current brake to match the setpoint, achieving the required control characteristics. See the controller manual for details.

5. When the load increases, pay attention to checking the outlet temperature of the eddy current brake. If the temperature exceeds 65 degrees, it is prone to burn the excitation coil. Additionally, excessively high water temperatures are more likely to cause scale buildup, which in turn affects the cooling efficiency. Therefore, it is advisable to increase the inflow volume or pressure, which will lower the outlet temperature. If the pipe water flow suddenly drops, the flow switch will send a signal, causing the excitation current to quickly drop to zero, serving as a safety protection. There are two temperature controllers installed on the casing, which control the armature body temperature to around 65 degrees. If the temperature exceeds 65 degrees, a signal will be sent as well, interrupting the excitation current of the eddy current brake, thereby providing safety protection. Small models do not have a temperature control knob.

As the speed increases, typically above 3500 to 400 rpm, close attention should be paid to checking the temperature rise at the main shaft bearing. If the temperature at the bearing housing is too high, the oil flow should be increased appropriately.

After the 7 tests are completed, the excitation current should be set to zero. After removing the load, stop the mechanical equipment being tested, then close the water inlet valve, and stop the circulation of the water supply system.

Cut power to the controller.

During operation, please ensure to first fill with water, then start the machine; when parking, first unload to zero, shut down the machine, and then stop the water.