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 The
Powder Brake Dynamometer (PB Series) contains, as its name suggests,
a magnetic powder. The electrical current passing through the
coil generates a magnetic field, which changes the property
of the powder, thus producing a smooth braking torque through
friction. They are ideal for applications operating in the low
to middle speed range or when operating in the middle to high
torque range. Like Hysteresis
Brakes, Powder Brakes provide full torque at zero speed.
Like the Eddy-Current
Brake Dynamometers, the PB series are water-cooled,
allowing for power ratings up to 48 kW. The PB Dynamometers
have accuracy ratings of ± 0.3% to 0.5% full scale (± 2% for PB 2.7), depending
on size and system configuration. Additional mounting possibilities
include speed pickup and OEM version IS.
Tandem Dynamometer
Magtrol offers Eddy-Current and Powder Dynamometers mounted
in tandem. In tandem, the unique features of each type of dynamometer
brake are utilized, allowing the unit under test to be applied
with nominal braking torque from zero speed to maximum rotation.
The Tandem Dynamometers are available on a number of PB/WB combinations.
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