Abstract: A power conditioner with neutral line offset current compensation function, includes a power converter, a measurement unit, a control module, and two coupling capacitors connected through the neutral line to a three-phase AC grid. The power conditioner eliminates the offset current on the neutral line by compensating the inaccuracies in the measurement unit with the control module, thus minimizing the voltage deviation of the coupling capacitors. Compared to traditional control circuits, a feedback path is added to achieve the elimination of the neutral line offset current, suppressing unstable and unpredictable voltage fluctuations on the coupling capacitors without affecting the rated power transmission of the power converter, thus extending the lifespan of the coupling capacitors and enabling the power conditioner to operate more stably.

Abstract: An indoor air quality control system, including a plurality of fixed detectors, an unmanned vehicle platform and a cloud computing platform. The fixed detectors detect the indoor air quality at respective designated positions in an indoor area. The unmanned vehicle platform moves along a designated route in the indoor area. When an index corresponding to the indoor air quality at a designated position reaches an air pollution warning value, a processing unit of the unmanned vehicle platform controls the unmanned vehicle platform to move towards a corresponding one of the designated positions and controls an air cleaning device on the unmanned vehicle platform to perform air cleaning. The cloud computing platform receives the indoor air quality detected by the respective fixed detectors and the mobile air quality detected by a mobile detector on the unmanned vehicle platform over the Internet.

Abstract: An indoor air quality control system, including a plurality of fixed detectors, an unmanned vehicle platform and a cloud computing platform. The fixed detectors detect the indoor air quality at respective designated positions in an indoor area. The unmanned vehicle platform moves along a designated route in the indoor area. When an index corresponding to the indoor air quality at a designated position reaches an air pollution warning value, a processing unit of the unmanned vehicle platform controls the unmanned vehicle platform to move towards a corresponding one of the designated positions and controls an air cleaning device on the unmanned vehicle platform to perform air cleaning. The cloud computing platform receives the indoor air quality detected by the respective fixed detectors and the mobile air quality detected by a mobile detector on the unmanned vehicle platform over the Internet.