Comparison of properties of electromagnetic clutches with ferromagnetic powder and magnetorheological fluid for low frequency control signals
The article presents the results of laboratory tests for the two electromagnetic clutches of controllable: powder clutch and clutch fluid MR. The research was aimed at comparing the opportunities for coupling the power supply conditions in the low-frequency signals of 1 to 5 Hz. The system uses proprietary software written in Visual Studio C#. The program allows for controlled, laboratory power supply ATTEN PPS3205T-3S.
Study on Performance of Vehicle magnetic Powder Clutch with Permanent Magnet
It proposed a new type of magnetic clutch structure- - magnetic powder clutch with permanent magnet. The traditional design and calculation method for the magnetic powder clutch is insufficient accuracy, the electromagnetic field finite element method was used to simulate and calculation the magnetic powder clutch with permanent magnet. As a result, magnetic powder clutch with permanent magnet was proved to work well in energy conservation and reduction of energy consumption.
Design of a safety escape device based on magnetorheological fluid and permanent magnet
In this research, a novel safety escape device based on magnetorheological fluid and permanent magnet is designed, manufactured, and tested. The safety escape device with magnetorheological fluid and permanent magnet can provide an increasing braking torque for a falling object by increasing the magnetic field intensity at the magnetorheological fluid. Such increase is realized by mechanically altering the magnetic circuit of the device when the object is falling. As a result, the falling object accelerates first and then decelerates to stop in the end. Finite element analysis is used to determine some of the specifications of the safety escape device for larger braking torque and smaller size. Finite element analysis results are also used for theoretical study and establishment of the dynamic model of the safety escape device. A prototype is realized and tested finally. The experimental test results show that the operation of the prototype conforms to the prediction by the dynamic model and validates the feasible application of magnetorheological fluids in developing falling devices.