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摘要:
针对平流层艇载风速计电滑环供电方式的不足，设计了基于DSP控制的艇载风速计非接触供电系统。利用电磁感应原理，明确了非接触供电系统的组成；通过建立系统等效电路模型，分析了影响系统传输效率及传输功率的因素；结合艇载风速计的结构及应用背景，借助ANSYS Maxwell电磁仿真软件设计了嵌套式松耦合线圈。通过对系统主要电路进行仿真并搭建基于DSP控制的原、副边电路，对系统的工作特性进行验证，仿真及试验结果表明：基于DSP控制的平流层艇载风速计非接触供电系统能够实现良好的非接触能量传输，降压后可为平流层艇载风速计供电。
Abstract:In view of the deficiency of the power supply mode for the electric slip ring of the stratospheric airship anemometer, a contactless power supply system of the airship anemometer based on DSP control is designed. Based on the principle of electromagnetic induction, the composition of contactless power supply system is defined; by establishing the equivalent circuit model of the system, the factors affecting the transmission efficiency and power of the system are analyzed; combined with the structure and application background of the boat borne anemometer, the nested loosely coupled coil is designed with the help of ANSYS Maxwell electromagnetic simulation software. Finally, the main circuit of the system is simulated, and the primary and secondary circuits based on DSP are built to verify the working characteristics of the system. Simulation and experimental results show that the designed contactless power supply system can accomplish good wireless energy transmission, and can supply power for stratospheric shipboard anemometer after depressurization.
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图 2 磁耦合谐振式非接触供电系统框图
Figure 2. Block diagram of magnetic coupling resonant non-contact power supply system
图 4 系统输出功率、传输效率随谐振频率变化曲线
Figure 4. Curves of output power and transmission efficiency for system with resonance frequency
图 5 系统输出功率、传输效率随线圈互感变化曲线
Figure 5. Curves of output power and transmission efficiency for system with coil mutual inductance
图 10 耦合系数与初次级线圈间距离关系曲线
Figure 10. Relation curves of coupling coefficient and primary and secondary coil distance
图 12 非接触供电系统逆变电路仿真图
Figure 12. Simulation diagram of inverter circuit in contactless power supply system
表 1 仿真得到的线圈参数
Table 1. Coil parameters obtained by simulation
线圈互感
$M$/μH初级线圈
电感${L}_{1}$/μH次级线圈
电感$ {L}_{2} $/μH初级线圈
电阻${R}_{1}/\Omega$次级线圈
电阻${R}_{2}/\Omega$14.073 18.153 16.379 0.202 0.186 
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表 2 线圈实际参数
Table 2. Actual coil parameters
线圈 电感/μH 电阻/$ \mathrm{\Omega } $ 初级线圈 19.6 0.2 次级线圈 22.2 0.2
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表 3 试验测量值
Table 3. Test measured value
初次级线圈
距离/mm发射端
电压/V发射端
电流/A接收端
电压/V接收端
电流/A发射功
率/W接收功
率/W1 28 0.3 32.5 0.22 8.4 7.15
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