LCL型CPT系统的参数设计方法及频率特性分析

以金鲳鱼为原料,固定小麦粉与水的质量比为2∶1,食盐添加量2%,微波真空度0.095 MPa,在单因素试验的基础上,通过正交试验对微波真空技术膨化鱼糜饼工艺条件进行优化。结果表明,鱼糜饼制作的最佳工艺条件为:鱼糜含量35%,膨化温度100℃,膨化时间20 min,鱼糜饼厚度2 mm,在该工艺条件下,制得的膨化鱼糜饼色泽金黄、质地酥脆、风味清香,成品膨化率可达到540%。

Parameter design and soft-switching frequency characteristics of capacitive power transfer systems with a LCL resonant circuit

To simplify the complex parameter design process and reduce the switching loss of CPT (capacitive power transfer) system with a LCL resonant circuit, we proposed a simple parameter design method based on impedance transformation principle and presented a calculation method for the soft-switching frequency. With the stroboscopic method and the fixed-point theory, the precise ZCS (zero current switching) soft-switching frequencies can be calculated. The effect of the coupling capacitance and the load resistance on the soft-switching frequency was analyzed, and then the capacitance and the load range allowing the soft-switching were given. A simulation model and an experimental prototype were built to verify the accuracy of the parameter design and the soft-switching frequency. It shows the whole efficiency of the system is about 87%.