Research On Induction Power Supply Of Planar Array Coil And Power Monitoring System Of Rotating Shaft

The manufacturing industry is the main body of the national economy,and the foundation of a nation.Building an internationally competitive equipment manufacturing industry is an inevitable way,to enhance overall national strength,ensure national security,and build a world power for our country.Rotating structural parts are extremely common and play an important role in the manufacturing industry.The rotating structure often supplies power or control direction in a system.When its speed or torque is abnormal in the operation process,it will directly affect the safety and stability of the system.In a slight case,it will affect the product quality,and in a serious case,it will damage the equipment and cause safety accidents.Therefore,the online real-time monitoring of the rotating structure is particularly important to ensure the safe and efficient operation of the equipment.However,the rotating structure is always in a state of rotation.The conventional brush power supply structure has a problem of long-term reliability.Inductive Coupled Power Transfer(ICPT)technology is an effective way to solve the problem of safe and stable power supply within non-contact condition.Focus on the shaft power monitoring system,this paper proposed a rotating shaft power monitoring system based on the ICPT technology of a planar array coil.The theoretical analysis,simulation and physical experiments of the planar array coil structure were conducted.And the principle research,circuit design,and test verification of the shaft power monitoring system were performed.The structure of planar array coil could overcome the shortcomings of traditional coaxial and side-type coupling structure,namely,tediousness of design,installation,and debugging.It could also avoid the disadvantage that the transmitting and receiving coils remain relatively static when the inductive coupled structure was powered.These features made it better adaptive to supply power for rotating equipment.Meanwhile,extraction of small fluctuations in induced voltage could realize the measurement of the shaft rotation speed.The monitoring system was powered by inductive coupling of a planar array coil.Aiming at the Electro Magnetic Compatibility,(EMC)problems of high-frequency electromagnetic coupling,preliminary explorations were made from the following three aspects: circuit electromagnetic compatibility design to reduce system electromagnetic interference intensity,PCB layout optimization design to block electromagnetic interference conduction path,and later overall electromagnetic isolation to improve the EMC performance of the system.A wireless transmission and processing display system of monitoring shaft rotation speed,torque and power,based on inductive coupled power supply was designed.And the testing results show that the monitoring system can achieve the expected function and meet the design requirements and technical indicators.