Abstract
This letter proposes a conditional pulse density modulation (PDM) method for inductive power transfer (IPT) systems, which can automatically adapt the generated output patterns to effectively suppress current/power ripples. The proposed conditional PDM introduces a sending current limitation as an additional condition to skip pulses, which modifies the output patterns generated by conventional delta-sigma-based PDM. Thus, the PDM pulse pattern is continuously adapted to attenuate any excited current/power oscillations. The presented modulator is simple to implement and well-suited for IPT systems with poorly damped constant voltage load characteristics. Simulations and experiments demonstrate the effectiveness of the proposed modulation method. © 1986-2012 IEEE.
| Original language | English |
|---|---|
| Pages (from-to) | 88-93 |
| Number of pages | 6 |
| Journal | IEEE Transactions on Power Electronics |
| Volume | 39 |
| Issue number | 1 |
| Online published | 16 Oct 2023 |
| DOIs | |
| Publication status | Published - Jan 2024 |
Funding
This work was supported in part by the Project Ultra-High Power Density Wireless Charging for Maritime Applications, funded in part by the Research Council of Norway under Grant 294871, and in part by Singapore Maritime Institute under Grant SMI-2019-MA-2.
Research Keywords
- Inductive power transfer (IPT)
- pattern optimization
- pulse density modulation (PDM)
- ripples
- zero-voltage switching (ZVS)