Abstract: A boomerang wind blade includes a blade body having a protruding front edge and a recess rear edge. Both sides of the center of the blade body are two wing parts bent at an angle. The wing shape of one wing part is round at the front edge and tapering towards the rear edge. The wing shape of the other wing part is round at the rear edge and tapering towards the front edge. The device with a boomerang wind blade has a shaft fixed to the center of the two wing parts of the blade body to rotate as the blade body is driven by wind. The device also has at least one generator coupled with the shaft to generate electrical power.
Type:
Grant
Filed:
January 30, 2013
Date of Patent:
October 20, 2015
Assignee:
National Penghu University of Science and Technology
Abstract: A boomerang wind blade includes a blade body having a protruding front edge and a recess rear edge. Both sides of the center of the blade body are two wing parts bent at an angle. The wing shape of one wing part is round at the front edge and tapering towards the rear edge. The wing shape of the other wing part is round at the rear edge and tapering towards the front edge. The device with a boomerang wind blade has a shaft fixed to the center of the two wing parts of the blade body to rotate as the blade body is driven by wind. The device also has at least one generator coupled with the shaft to generate electrical power.
Type:
Application
Filed:
January 30, 2013
Publication date:
July 31, 2014
Applicant:
NATIONAL PENGHU UNIVERSITY OF SCIENCE AND TECHNOLOGY
Abstract: A simplified multilevel DC converter circuit structure comprises a dual input DC power supply, a power control module and an AC side low-pass filter, wherein each of the dual input DC power supply supplies half of the rated DC voltage to the power control module, and the power control module is composed of six power switches, and different switching combinations of each power switch are controlled to convert a DC voltage to an output of an AC voltage, and two of the power switches of the power control module perform a low-frequency switching twice every cycle of the output voltage, and the withstand voltage is equal to the input voltage, and the remaining power switches perform the switching by a high frequency, and the withstand voltage is only half of the input voltage, such that a multilevel voltage can be outputted, and a low harmonic AC waveform can be outputted from the AC side low-pass filter.
Type:
Grant
Filed:
July 11, 2011
Date of Patent:
May 27, 2014
Assignee:
National Penghu University of Science and Technology
Abstract: A simplified multilevel DC converter circuit structure comprises a dual input DC power supply, a power control module and an AC side low-pass filter, wherein each of the dual input DC power supply supplies half of the rated DC voltage to the power control module, and the power control module is composed of six power switches, and different switching combinations of each power switch are controlled to convert a DC voltage to an output of an AC voltage, and two of the power switches of the power control module perform a low-frequency switching twice every cycle of the output voltage, and the withstand voltage is equal to the input voltage, and the remaining power switches perform the switching by a high frequency, and the withstand voltage is only half of the input voltage, such that a multilevel voltage can be outputted, and a low harmonic AC waveform can be outputted from the AC side low-pass filter.
Type:
Application
Filed:
July 11, 2011
Publication date:
January 17, 2013
Applicant:
National Penghu University of Science and Technology