Fault-tolerant control system and method applied to magnetic suspension high-speed blower

Abstract

The invention relates to a fault-tolerant control system and method applied to a magnetic suspension high-speed blower. The fault-tolerant control system comprises a DSP control circuit, a motor information interface circuit, a motor sensor circuit, a communication interface circuit and a power supply circuit. According to the system, the magnetic suspension high-speed air blower is controlled through a field oriented control FOC, and motor phase current, bus voltage, rotor position and a rotor speed are detected through a motor sensor circuit and fed back to the DSP control circuit for FOC control; a random weighted square root volume Kalman filter is further applied to observe the position and the rotating speed of a motor rotor; and when a motor sensor circuit breaks down and cannot normally feed back the position and the speed information of a rotor to an FOC control algorithm, the system can replace the position and the speed information of the rotor by using the observation result of the random weighted square root volume Kalman filter, so the requirement of fault-tolerant control can be met.

Description

Technical field [0001] The present invention relates to the field of electromechanical, in particular a fault-tolerant control system and method applied to a magnetic levitation high-speed blower. Background technique [0002] As a mechanical device for conveying gas, the magnetic suspension high-speed blower relying on the rotor biased in the cylinder, and the volume change between the blades in the rotor groove will increase air inhalation, compression, spit out, widely used in sewage treatment, smelting blast furnace , Washing mill, mine flotation, chemical gas, vacuum, etc. [0003] Magnetic hitting high-speed blower motors generally use a permanent magnet synchronous motor and drive using the FOC control algorithm. This control mode has a smooth output torque, wide speed range, good dynamic performance, high voltage utilization, but requires the position and speed information of the rotor as feedback, and thus requires information of the angular position sensor to collect mo...

AI Technical Summary

Problems solved by technology

Since blowers are mostly used in harsh environments such as industrial material transportation and sewage treatment, the performance of the angular position sensor may be affected to a certain extent, and may even be damaged, affecting the normal operation of the blower.

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