Magnetic powder dynamometer case

A magnetic powder dynamometer case is a high-stability, precision load-absorbing assembly designed for steady-state and low-to-medium speed torque/power testing of motors, engines, reducers, and powertrain components.

Core Working Principle

The case houses a stator, rotor, excitation coil, and magnetic powder chamber. When energized, the coil generates a magnetic field that chains magnetic particles, creating controllable drag torque between rotor and stator. Torque is linearly adjustable via excitation current—stable even at zero speed (stall).