Permanent Magnet Brake - PMB
ICP permanent magnet brakes engage when the electrical power supply is off. The braking force is generated by permanent magnets instead of springs, mainly used in fail-safe applications to automatically stop the drive when the electrical power fails.
PMB series brakes are composed of a single plate and armature. There is zero-backlash due to the diaphragm armature and no residual drag torque from the springs.
- Voltage: 24VDC
- Static torque: 0.02 - 140 Nm
Permanent Magnet Power Off Brake - Zero Backlash
1. Brake Operation
- When the current is cut off, the magnetic force of the permanent magnet engages an armature plate and produces rated torque.
2. Brake Release
- When the coil is energised, the excitation voltage reaches a certain level.
- The magnetic force of the permanent magnet will be neutralised by the reverse pole of the magnetic force generated from the coil.
- The induction force between an armature plate and the yoke will also disappear which releases the brake.
- The axial float of the machine shaft should not exceed 0.05 mm
- Ensure a consistently flat and smooth power supply i.e. pure DC voltage or fully rectified AC supply.
- Make sure the brakes are used in dry conditions. If metal filings or dust are present in the area make sure to enclose the brake in dustproof housing.
- If initial torque is less than catalog specification, operate the brake in dynamic conditions (30-60 rpm) for up to 50 cycles until friction faces are burnished.
- PMB brakes can operate at 0-40°C ambient. Avoid extreme temperatures and humidity.
|Industry Applications||robotics, servo motors, positioning|
|Brake Type||Permanent Magnet|
|Torque Rating||0.4 - 140 Nm|