Force-control-based magnetic levitation system and control method

Abstract

The invention discloses a force-control-based magnetic levitation system and a control method. The system comprises a mechanical device and a control system. The medical device comprises a rotor, an electromagnetic force generation device and dynamometric bearings. The control system comprises a voltage amplifier, a controller and a power amplifier. The dynamometric bearings are arranged at the two ends of the rotor. The electromagnetic force generation device is arranged between the dynamometric bearings at the two ends of the rotor. The input end of the voltage amplifier is connected with the dynamometric bearings, and the output end of the voltage amplifier is connected with the input end of the controller of which the output end is connected with the input end of the power amplifier. The output end of the power amplifier is connected with the electromagnetic force generation device. A displacement control method is replaced by the force control method, the quasi levitation of the rotor is realized, the complexity of a circuit system is lowered, and the system is simple in structure, convenient to construct and suitable for popularization and application, and is flexibly operated.

Description

technical field [0001] The invention relates to the technical field of magnetic suspension, in particular to a magnetic suspension system based on force control and a control method thereof. Background technique [0002] At present, in the magnetic levitation control system, the stable levitation of the rotor without contact is mainly achieved by controlling the displacement of the rotor from its equilibrium position. This control system is called a magnetic levitation system based on displacement control. Its main principle is that after the sensor detects the displacement of the rotor from the reference point, the controller converts the detected displacement into a control signal, and then the power amplifier converts the control signal into a control current, and the control current is in the actuator electromagnet A magnetic force is generated to drive the rotor back to its original balance position, maintaining its stable levitation position. [0003] At present, the ...

AI Technical Summary

Problems solved by technology

[0006] Second, the displacement sensor of the magnetic levitation system based on displacement control cannot be directly installed on the position of the magnetic bearing, so the displacement at the magnetic bearing cannot be directly measured. The complexity of the control system

[0008] Fourth, the bearing capacity of the magnetic bearing of the magnetic levitation system based on displacement control cannot meet the requirements of the high-speed rotor, and the bearing capacity is only provided by the magnetic bearing, and it is difficult to achieve a high-stiffness magnetic bearing

[0010] Due to the above-mentioned shortcomings of the maglev system based on displacement control, which largely limits the development of high-speed precision rotors, the existing technology still needs to be improved and developed

Images