With the variations in the DC supply voltage, it is easy to alternate the input DC voltage of the converter and control the rotating speed of stator's magnetic flux.

通过直流电源电压的变化，可以方便地调节定子磁链的旋转速度。

youdao

Then perhaps the "neon media flow that carves a delicate energy line from the DC input all the way through to the touchpad" will be enough to sell you on it.

ENGADGET: Acer reveals Gemstone, TravelMate ProFile laptop designs

With the ability to fully charge in ten hours via the sun, or in seven hours by way of the Micro-USB DC input, BoostSolar includes a standard USB port for charging any of your mobile devices.

ENGADGET: Eton adds BoostSolar to its charging lineup, instantly pleases George Harrison (hands-on)