Take a look, the magnetic powder dynamometer structure principle that we have not understood in those years is worth a look
Magnetic powder dynamometer is composed of stator, solid rotor, exciting coil, magnetic powder medium, bracket, bottom plate, etc. When the internal coil of the magnetic powder dynamometer passes a current, a magnetic field is generated, so that the internal magnetic powder is arranged into a magnetic chain according to the magnetic field lines. The pulling force becomes resistance to prevent the rotor from rotating, and this force is the load torque. Changing the exciting current can change the load torque.
Magnetic particle dynamometer is a brake dynamometer (torque machine) designed and manufactured according to the principle of magnetic powder torque technology. It is a torque machine that applies a torque load to the motor under test and absorbs its power. It is also a rotating torque-a static torque. Converter. Both the speed sensor and the torque sensor are installed on the magnetic particle dynamometer. The speed and torque of the tested motor are converted into pulse signals and analog signals by the dynamometer, and sent to the dynamometer controller for display. The tested motor drags the magnetic powder. When the dynamometer rotates, all the power output by the motor is absorbed by the magnetic powder dynamometer and converted into thermal energy, which is dissipated by means of a radiator and peripheral cooling fans or water cooling.
Normal working conditions
Temperature (ambient temperature) 0 ～ 40ºC 2.2 Relative humidity: 30% —90%
Power supply: single-phase three-phase AC power supply with a frequency of (50 ± 2) HZ (except for the test-dedicated power supply) AC at single phase (220V ± 10%) AC at three phases (380 ± 10%) 2
Cooling water temperature should not exceed 50ºC
When working, the controller provides the excitation current to the magnetic powder dynamometer. When the internal coil of the magnetic powder dynamometer is energized, a magnetic field is generated, so that the internal magnetic powder is arranged in a magnetic chain according to the magnetic lines of force. Resistance. This force is the load torque. The magnitude of this torque is only related to the current applied by the controller to the dynamometer coil, and has nothing to do with the speed at which the test motor drags the dynamometer to rotate.
Magnetic particle dynamometer is one of the equipments in work. Our Hailing magnetic powder provides magnetic powder dynamometer, magnetic powder brake and other series of mechanical and electrical products with superior performance. It has been well received by customers.