Michael Lin 林立一种逆变器功率单元的组装结构，包括电容、功率模块、散热器以及风扇。其中，所述散热器包括基板以及与基板相连的多条齿片。所述电容设置在所述功率模块上。所述功率模块安装在所述基板的外表面。所述风扇安装在齿片与基板相对的端部，且与所述功率模块平行设置。本实用新型通过电容、功率模块、散热器以及风扇的依次顺序放置的立体化结构设计，使结构更为紧凑，安装面积小，且，采用风扇对齿片垂直吹风的模式，散热效果好，同时提高了功率模块的使用率和可靠性。另外，本实用新型还提供一种使用该组装结构设计的模块化功率单元。
An apparatus (10) for supplying regulated voltage d.c. electrical power to an LED array (12) includes a rectifier (32) responsive to a.c. power for generating rectified d.c. power and a power factor correcting and voltage regulating buck/boost switchmode converter (38) responsive to the rectified d. ...
A low power switched rectifier circuit is realized using P-MOS and N-MOS FET switches that are turned ON/OFF at just the right time by a detector and inverter circuit (which form an integral part of the rectifier circuit) to rectify an incoming ac signal in a highly efficient manner. Parasitic diode ...
By using a target voltage Vc* of a capacitor connected to the output side of a DC/DC converter and a voltage Vb of a battery connected to the input side of the DC/DC converter, a duty ratio D (Vb/Vc*) as a drive instruction of the DC/DC converter is calculated (S100, S102). By using the voltage Vb, ...
A DC-to-DC voltage converter is disclosed for converting the voltage from a battery to provide a power supply voltage whose value can be equal to the battery voltage multiplied by or divided by a non-integral factor, e.g. 2/3. The converter operates on the principle of capacitor charge switching, an ...
A DC-to-DC converter generates an output voltage from an input voltage. The converter includes first and second inductive windings and a magnetic core. One end of the first winding is switched at about 180 degrees out of phase with one end of the second winding, between ground and the input voltage. ...
A three-stage switched capacitor DC-DC converter capable of generating an output boosted voltage in increments of less than power supply voltage. A first stage of the DC-DC converter comprises two capacitors and three switches, which alternate a connection of the two capacitors. The two capacitors a ...
An off-line switching power supply is described which controls the switching transistor of a fly-back circuit in such a fashion as to achieve better than 0.99 power factor control. The technique used for power factor control allows the switching power supply to operate either from AC or DC sources. ...
This invention relates to a high efficiency device for the direct conversion of light power to electrical power. Present photocells for accomplishing this purpose are well known to the art and have a theoretical efficiency not exceeding about 20%. In practice, realization of efficiency of about 10% ...
A DC to DC power converter having reduced switching loss for operation at high frequencies. As disclosed, a buck, or forward, converter includes a first FET as the switching device in series with an inductor and a second FET as the flywheel device. At the common node to which the two FET's and the i ...
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