Hollow magnetic powder brake for manual tension controller
The magnetic particle powder brake/clutch is composed of active
rotor(input shaft), driven rotor(output shaft) and Yoke with
excitation coil. The three parts are assembled relative concentric
and form a system which can rotate relatively. The annular gap
between active rotor and driven rotor is full of alloy powder which
has high magnetic conductivity.
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The transmission torque has a linear relationship with the
magnetizing current. The size of the torque can get controlled
within large range. Under normal circumstance, the magnetizing
current of the magnetic powder brake has a linear relationship with
transitive torque within range of 5%-100% rated torque.
The friction part of the magnetic powder brake will generate heat
inevitably or even destroyed when it keep continuous sliding. But
this device has a complete cooling set, it will not generate a lot
of heat after long time running and it has a long service life.