Modulation method and apparatus to reduce EMI in a power converter
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A modulation scheme that mitigates electromagnetic interference (EMI) in quasi Z source DC-DC power converters
Minimal change to existing power converter circuits
Can be adapted for use in a variety of converter circuits.
Can be used with single, double and four-switch circuits
Especially useful for reducing EMI generated by high-speed switches such as GaN HEMTs.
Switch-mode converters and motor drives, including those requiring an isolation transformer.
Well-suited to renewable energy applications (large voltage gain), biomedical electronics (low interference), compact high-frequency converters (commercial and portable electronics)
A novel modulation technique which is simple to implement and also suitable for use with H-bridge switch-mode converters (4 switching devices, 3 circuit states).
The modulation method results in approximately 10 dB suppression of EMI, and is particularly suited for use in impedance-source converters, i.e. an emerging H-bridge based converter topology with several advantages over other converters, including a large voltage gain.
Licensing
WO 2017/120644
2016002
澳洲
