给出了一种永磁振动发电机感应电动势的计算公式,设计了一种新型Halbach阵列永磁振动发电机,机体两侧分别固定了两组永磁体,内部6个线圈串联。采用有限元法,与普通Halbach阵列和传统永磁振动发电机进行了对比分析,新型Halbach阵列的应用大幅度提升了振动发电机的性能。正弦规律振动的振源频率为10 Hz,振幅为3 mm时,新型振动发电机的最大输出功率为355.85 mW,开路电压有效值为6.402 9 V。最后,对线圈相对永磁体的位置进行了优化,最大输出功率达到了414.81 mW,进一步提升了16.57%,此时开路电压有效值为7.036 6 V。

A formula of induced electromotive force of leaner vibration generators was presented. Linear permanent magnet vibration generator equipped with the new Halbach arrays was designed, two sets of permanent magnets were fixed on two sides of the body, and the inner six coils were connected in series. Compared with those using the conventional Halbach array and traditional permanent magnets, finite element analysis used, the application of the new Halbach array greatly improves the generators’ performance. The maximum output power was 355.85 W, and the open circuit effective voltage was 6.402 9 V, with the sinusoidal vibration frequency was 10 Hz, and the amplitude was 3 mm. At last, the coils’ relative positioning to magnets was optimized, the maximum output power was up to 414.81 mW, 16.57% improved, and the open circuit effective voltage was 7.036 6 V.

TM 351

国家自然科学基金项目(51171057)