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Non-invasive Plug-and-Play Voltage Ripple Mitigating Circuit

Non-invasive Plug-and-Play Voltage Ripple Mitigating Circuit

Key Problem and Market Opportunity

  • The global direct current (DC) power systems market generated $3,919.8 million in 2016. The DC power systems market was projected to reach $4,411.1 million by 2021 at a CAGR of 2.4%.
  • In DC power systems, low frequency voltage ripples may remain after passing a single-phase AC/DC converter.
  • The voltage ripples can cause extra thermal stress in power electronics devices. Particularly, the thermal stress reduces the life time of electrolytic capacitor in electronic applications such as LED and solar cell.
  • Conventional active power filters for removing the voltage ripples in DC systems requires hardware modification and they are expensive because of additional control systems. Therefore, it is uneasy to deploy the power filter without customizing an electronic application.

Key Advantages of the Technology

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  • Non-invasive Plug-and-Play circuit enabled hot-swap operation and ease maintenance of power utilities
  • Reduce voltage ripples in DC systems (Fig 1)
  • Extend the lifetime and reliability of electrolytic capacitor and the overall power electronic applications (e.g. LED and solar cell) by reducing the thermal stress of power electronic components
  • As an example, all components enjoyed a surface (junction) temperature reduction of more than 7.5 °C in the testing boot PFC circuit board in Fig 2

Potential Product and Services

  • A plug-and-play device module for stabilizing DC electronic applications and DC power supply

Development status and IP Strength

  • PCT Application No. PCT/CN2015/092649
  • Device prototype is available in laboratory scale

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