Things about Electromagnetic Brakes (I)

When the coil of a dry-type electromagnetic brake is energized, it generates magnetic force, attracting the armature plate, and the brake is engaged. When the coil power is cut off, the armature rebounds, and the brake disengages. Electromagnetic brakes and brake motors are generally used in environments with temperatures ranging from -20℃ to 50℃ and humidity up to 85%, in media without explosion hazards. The coil voltage fluctuation should not exceed 5% of the rated voltage.

When the coil of a dry electromagnetic brake is energized, it generates magnetic force, attracting the "armature" plate, and the brake is engaged. When the coil power is cut off, the "armature" springs back, and the brake is disengaged. Electromagnetic brakes and brake motors are generally used in environments with temperatures ranging from -20℃ to 50℃ and humidity within 85%, in media without explosion hazards, and where the fluctuation of the coil voltage does not exceed 5% of the rated voltage.
Features of Dry Electromagnetic Brakes

1. High-speed response. Being a dry type, torque is transmitted quickly, allowing for easy operation. 

2. Strong durability. Good heat dissipation, and the materials used ensure sufficient durability even with high frequency and high energy use.

3. Easy assembly and maintenance. As it is a stationary magnetic field coil type with built-in ball bearings, there's no need to remove the chassis or use carbon brushes, making it convenient to use. 

4. Reliable operation. Using plate springs, it won't loosen even with strong vibrations, ensuring good durability. 
Precautions for Using Dry Electromagnetic Brakes

1. Do not add grease when using dry electromagnetic brakes, as this may reduce torque. 

2. Clean the electromagnetic brake thoroughly before installation, removing anti-rust grease and debris. 

3. The electromagnetic brake can be installed coaxially or mounted on the shaft with axial fixing. When mounted on the shaft, the coaxiality between the shafts of the driving and driven parts should be less than 0.1mm. 

4. When wet electromagnetic brakes are in operation, lubricating oil is added between the friction plates, and the lubrication method is injection lubrication. The part immersed in oil should be 5 times the brake volume. For high-speed and high-frequency operation, axial oil supply lubrication method is used.

5. When installing claw-type electromagnetic brakes, ensure a certain clearance between the end face teeth to prevent tooth grinding during idling. 

6. Electromagnetic brakes and brakes are Class B insulated, with a normal temperature rise of 40℃. The operating temperature at thermal equilibrium must not exceed 100℃. Otherwise, the rings and friction parts can easily be damaged. 

7. The power supply, control lines, and brake power supply are generally 24V DC. Three-phase or single-phase AC voltage is obtained through step-down and full-wave rectification, with no stabilization or filtering requirements. The power supply capacity should be at least 1.5 times the rated power of the electromagnetic separator. If using a half-wave rectified power supply, a flyback diode must be installed.