Solid-state power controller for onboard 28 VDC power distribution control and application structure
A solid-state power and power distribution control technology, which is applied in the direction of electrical components, electronic switches, pulse technology, etc., can solve the problems that electronic contactors cannot be reached, and achieve the effect of large flow rate and increased power density
Pending Publication Date: 2021-01-05
SHANGHAI AVIATION ELECTRIC
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Problems solved by technology
The application of solid-state power controllers in high-power applications is limited by volume and heat dissipation. Compared with traditional switching devices such as contactors, the current high-current SSPC design cannot achieve the power density of electronic contactors (Electronic Load Control Contactor, ELCC) equivalent level
[0005] See figure 1 , subject to the influence of high current, the traditional connection of two on-board 28VDC bus bars is still a contactor instead of a solid-state power controller
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[0038] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0039] See Figures 2 to 4 , what is shown in the figure is a solid-state power controller with 350A flow capacity for on-board 28VDC power distribution control. The solid-state power controller is mainly composed of a PCB board body 1, a power channel unit 2, a digital control circuit unit 3, and a communication connector unit 4.
[0040] The PCB board body 1 is a four-layer layered structure, which has a top surface layer 11 , a middle copper layer 12 , a ...
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The invention discloses a solid-state power controller for onboard 28 VDC power distribution control and an application structure. The solid-state power controller comprises a power channel unit whichis formed by a plurality of GaN power MOS tubes arranged in parallel array. The invention further discloses an application structure of the solid-state power controller for onboard 28 VDC power distribution control, and the application structure comprises two 28 VDC bus bars, and the solid-state power controller, wherein a bottom aluminum layer in the solid-state power controller is connected with one 28 VDC bus bar, and an external copper layer in the solid-state power controller is connected with the other 28 VDC bus bar. The solid-state power controller has the beneficial effects that in the aspect of power density, the volume of the whole SSPC is equivalent to that of a traditional 80 A contactor, but the flux reaches 350 A, and the power density is equivalently improved by 3.5 times.
Description
technical field [0001] The invention relates to the field of on-board power distribution, in particular, a solid-state power controller for 28VDC power distribution control on a machine and an application structure. Background technique [0002] The Solid State Power Controller (SSPC) receives control commands from the external bus, and sends out drive signals for power MOS tubes after calculation to distribute power to the corresponding load channels. Under abnormal conditions (such as overload or short circuit), the solid-state power controller will pull down the drive signal of the power MOS tube, disconnect the load circuit, and protect the aircraft power distribution network. At the same time, the solid-state power controller will also collect the status of the load channel, and send information such as voltage, current, channel on-off status, etc. to the external bus through the microprocessor. [0003] Solid-state power controllers are widely used in modern aircraft,...
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IPC IPC(8): H03K17/693
CPCH03K17/693
Inventor 万波
Owner SHANGHAI AVIATION ELECTRIC