One is based on DC-DC Converter with switching transformer to get 325V DC VBUS voltage for H-Bridge from 12V Battery voltage. I am actually making two versions of the Inverter. In both I am getting this distorted signal.
![lc filter design tool h pi lc filter design tool h pi](https://i.stack.imgur.com/jjqVt.png)
I am attaching my Proteus simulation file. SPWM is ok because if I connect RC low pass filter then I get pure sinewave output. I need 50 Hz fundamental sinewave output. My SPWM frequency is 16 KHz and so I chose cutoff frequency for filter as 3 KHz. Please tell me how to design a good LC output filter. The issue is I am not getting sinewave signal at the output. I am using 12V Battery voltage to 325V DC VBUS voltage DC-DC Converter (not shown in simulation). I have designed a true sinewave inverter for single phase 220V 50Hz. Electron.True Sinewave Inverter - Output LC filter design help needed Wang, Y., Dongye, Z., Kheirollahi, R., Zhang, H., Zheng, S., Lu, F.: Review of load-independent constant-current and constant-voltage topologies for domino-type multiple-load inductive power relay system. Yao, Y., Wang, Y., Liu, X., Xu, D.: Analysis, design, and optimization of LC/S compensation topology with excellent load-independent voltage output for inductive power transfer. Zhang, W., Mi, C.C.: Compensation topologies of high-power wireless power transfer systems. Namadmalan, A., Alonso, J.M., Iqbal, A.: Accurate fundamental harmonic modeling of inductive power transfer battery chargers. In: 2016 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW), pp. Xia, C., Chen, R., Liu, Y., Chen, G., Wu, X.: LCL/LCC resonant topology of WPT system for constant current, stable frequency and high-quality power transmission. In: 2017 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW), pp. Xia, C., Chen, R., Liu, Y., Liu, L., Chen, G.: Inhibition of current harmonics in LCL/LCC wireless power transfer system. In: 2015 IEEE PELS Workshop on Emerging Technologies: Wireless Power (WoW), pp. et al.: Improved LCL resonant network for Inductive Power Transfer system. In: 2020 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW), pp. Huang, T., Tan, L., Wang, R., Li, C., Li, H., Huang, X.: Research on suppression of higher harmonics in wireless power transmission system. In: 2015 IEEE Energy Conversion Congress and Exposition (ECCE), pp. 68(6), 4882–4893 (2021)įeng, H., Zhang, X., Cai, T., Duan, S., Zhao, J.: Optimization of LCL resonant inverter in inductive power transfer systems based on high-order harmonics analysis. Wang, X., Xu, J., Mao, M., Ma, H.: An LCL-based SS compensated WPT converter with wide ZVS range and integrated coil structure. In: 2021 IEEE Sustainable Power and Energy Conference (iSPEC), pp.
![lc filter design tool h pi lc filter design tool h pi](https://i.stack.imgur.com/jxpwC.png)
Liu, Y., Gao, F., Liu, H., Li, H.: Harmonic analysis and ZVS implementation in double-side LCC WPT system. The related experiments verify the correctness of the analytical results. On this basis, selection guides of T-type/Π-type compensation networks in WPT systems are given. An evaluation method based on the ratio of harmonic and fundamental of current is proposed, and the mapping of the third harmonic content of the inverter current in different compensation networks is obtained by using the ratio of the input and output fundamental currents of the topology as the independent parameter. In this paper, the higher order harmonic suppression capability for the inverter current of different T-type/Π-type compensation networks are systematically analyzed. There is still a lack of solutions that utilize the harmonic suppression capability of the T-type/Π-type topology, even less the comparison of the harmonic suppression capability of various types of compensation.
![lc filter design tool h pi lc filter design tool h pi](https://live.staticflickr.com/7839/46743325784_c6c0319b29.jpg)
The existing solution is to add extra series power filters. This problem is especially prominent under light load conditions. However, the higher order harmonics in the output current can reduce the power factor of the inverter as well as shift the zero-crossing point of the inverter current, which increases the switching losses of the inverter. For wireless power transfer (WPT) systems, T-type/Π-type compensation networks have the advantage of converting the voltage source input to a constant-current output.