WZ Series Eddy Current Brake

WZ Series Eddy Current Brake Dalian No.2 Electric Motor Works 0411-66368522

The WZ series eddy current brake from Dalian No.2 Electric Motor Works is a braking device that operates on the principle of eddy current loss. It is widely used in various fields such as lifting, metallurgy, and power machinery testing. Below is a detailed introduction:

• Working Principle: After the excitation winding is energized, it generates a closed magnetic flux. When the induction disc rotates, the air gap magnetic density undergoes periodic changes, inducing eddy currents. The interaction between the eddy currents and the magnetic field produces a braking torque on the rotor, achieving the braking effect.
• Structural Composition: Mainly consists of the induction disc, armature, and excitation components.
• Performance Characteristics
  • Structure and Operation: Simple structure, easy operation and maintenance.
  • Braking Performance: High braking torque, high testing accuracy, and stable operation.
  • Dynamic Characteristics: Low moment of inertia, fast dynamic response.
  • Automation Level: Compatible with measurement and control systems, enabling automated operation.
• Technical Parameters
  • For Lifting and Metallurgy: Enclosure protection rating is IP23 for the main body and IP44 for the terminal box. Cooling method is IC411. The reference duty cycle is S3 15%. The rated braking torque is measured at 100 r/min when the excitation winding is thermally stable. Different frame sizes have varying parameters such as rated braking torque and limited braking torque.
  • Disc Type: Taking the WZ-B series as an example, the input speed range varies from 200 to 3600 r/min. The rated torque ranges from 5 N·m to 2200 N·m, with absorption power from 0.75 kW to over 100 kW. The excitation voltage is DC, ranging from less than 90 V to less than 20 V. Cooling water flow varies from 1 L/min to 1100 L/min depending on the model.
• Application Fields
  • Lifting and Metallurgy Industry: Suitable for speed regulation of wound-rotor three-phase asynchronous motors in various lifting machinery and metallurgical auxiliary equipment, such as the hoisting and traveling mechanisms of bridge cranes and gantry cranes, as well as the drive systems of rolling mills and continuous casting machines.
  • Power Machinery Testing: Can serve as an essential loading device in high-speed integrated magnetoelectric dynamometer systems for measuring the performance of various power machinery, such as electric motors, diesel engines, and gearboxes.
  • Tension Control Systems: Widely used in automatic tension control systems for winding devices in industries such as printing, packaging, papermaking, textiles, and dyeing.