Abstract:
Background Cyclotron rectifier is the core component of wireless power transmission system, and the magnetic field strength and distribution directly determine the efficiency and power of the rectifier.
Methods The article innovatively introduces an auxiliary magnetic circuit and establishes a permanent magnet focusing system model for cyclotron wave rectifiers based on Ansoft Maxwell software.
Purpose Through static magnetic field simulation design, the presence or absence of auxiliary magnetic circuit structure, magnetic field distribution at different positions of the central axis and offset central axis were analyzed. The influence of demagnetizing field on the permanent magnet focusing system was calculated and analyzed. Finally, a new type of permanent magnet focusing structure for matching C-band cyclotron wave rectifiers was designed.
Results The calculation result show that the magnetic induction intensity in the uniform zone is 0.22 T, the length of the uniform zone is 57 mm, the non-uniformity is ±1.76%, and the reverse field magnetic induction intensity is about 10% of the magnetic induction intensity in the uniform zone. The distribution conforms to the decreasing requirement of cosine distribution.
Conclusions The conformity of simulation calculations has been verified through actual products, providing effective guidance for engineering applications.
下载: