PCB空心线圈位置误差分析与控制

PCB空心线圈采用CAD方法设计和先进的PCB加工工艺制造，具有很好的测量精度和参数一致性，但是，线匝密度较小，而且截面上磁感应强度梯度较大，从而影响了线匝沿圆周均匀分布的连续性，使其具有了离散分布特征。该文基于线匝的离散分布特性建立了PCB空心线圈位置误差的数学模型，并进行了详细分析。结果表明，线圈结构参数(匝数和环径比)和位置参数(偏心距和倾斜度)是影响PCB空心线圈位置误差的主要因素。由此提出了位置误差的控制措施，为PCB空心线圈的优化设计和应用提供了理论基础。

Analysis and Control on the Position Errors of PCB Air-Core Coils

Printed-circuit board (PCB) air-core coils designed by using CAD tools and fabricated by adopting advanced PCB manufacturing technology are good in measurement accuracy and consistence of products parameters. But the characteristics of limited turns-density and large magnetic induction intensity grads on coil cross-section make great influence on the continuous uniform distribution of coil turns along the coil circumference and cause its discrete distribution. Based on the discrete distribution characteristics of coil turns, the position error mathematical models of PCB air-core coils are set up and then analyzed. The results show that the main factors affecting on the position errors of PCB air-core coils are the coil's structure parameters (number of turns and the ratio of the outside diameter to the inside diameter of toroidal coils) and the position parameters (eccentric distance and gradient). Some measures for controlling the position errors are presented. They are the theoretical basis of optimization design and application of PCB air-core coils.