Application Systems offers Geared Motor Test Systems. Powder dynamometers, as their name suggests, contain magnetic powder in the dynamometer. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder from free flowing condition at no excitation, to solid rock condition at full excitation, thus producing a smooth braking torque through friction between rotor and stator – proportional to excitation. The powder dynamometers produce their rated torque at zero speed. Powder dynamometers are manufactured in wide rating range, from tiny 0.2 kg.m (2 Nm) to massive 1000 kg.m (10000 Nm). By changing the exciting power force, the powder dynamometer achieves at low control power, a high torque, being independent from the slip speed. It distinguishes itself by simple construction, low weight and small required space. Powder dynamometers are ideal for applications operating in the low to mid speed range and mid to high torque range. For higher heat dissipation powder dynamometers are provided with water circulation system for cooling, which passes inside the stator to dissipate heat generated by the braking power with power ratings up to 60 kW. Advantage of powder dynamometer is that it controls torque right from zero RPM. These are used to test motors, BLDC motors, wiper motors, turbines, gearboxes and geared motors, low speed transmissions, small engines, etc.
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