Photovoltaic Inverter Layout for Easier Assembly and Cooling
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Solution Overview
Problem
The compact structure of photovoltaic grid-connected inverters compromises assembly and maintenance experiences due to limited access and space constraints.
Innovation Solution
The inverter is designed with a longer first direction and a shorter second direction, allowing for the arrangement of direct current and alternating current devices along the first direction and their respective components along the second direction, facilitating wider assembly and maintenance access while promoting heat dissipation through strategically placed air channels and fans.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the inverter is designed with a compact structure to increase power density, then the power output is improved, but the assembly and maintenance accessibility deteriorates
Solution Approach 1:
The patent applies dimensional arrangement by configuring the inverter with a clearly defined first direction (length direction) and second direction (width direction), where the first direction is greater than the second direction. The direct current device and inversion alternating current device are arranged along the first direction, creating extended access pathways along the length while maintaining compact width, thus resolving the contradiction between power density and maintenance accessibility.
2Power
If the internal modules are arranged compactly to increase power capacity, then the power output is improved, but the maintenance experience deteriorates
Solution Approach 1:
The patent segments the inverter into distinct functional modules: a direct current device including a direct current power distribution part and control unit, and an inversion alternating current device including a power unit, alternating current power distribution part, and reactor. These modules are arranged alternately along the first direction, creating organized segments that are easier to access and maintain individually while maintaining compact overall structure.
3Power
If the inverter size is increased to accommodate higher power, then the power output is improved, but the device volume increases
Solution Approach 1:
The patent employs asymmetric design by establishing that the length of the inverter in the first direction is greater than the length in the second direction. This asymmetric configuration allows optimized arrangement of power modules along the longer first direction, achieving higher power capacity without proportional increase in overall volume, thus resolving the contradiction between power output and device volume.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the convenience and efficiency of assembly and maintenance operations while improving heat dissipation, thus addressing the challenges of compact inverter designs.
Implementation Method 1
the first heat-dissipation air channel is configured with a first heat-dissipation fan, and the first heat-dissipation fan is used to drive air to flow from the first air inlet into the first heat-dissipation air channel and out from the first air outlet
Implementation Method 2
the third heat-dissipation air channel is configured with a third heat-dissipation fan, and the third heat-dissipation fan is used to drive air to flow from the third air inlet into the third heat-dissipation air channel and out from the third air outlet
Implementation Method 3
the second heat-dissipation air channel is configured with a second heat-dissipation fan, and the second heat dissipation fan is used to drive air to circulate between the alternating current power distribution part and the direct current power distribution part
Implementation Method 4
the housing is further configured with a heat exchanger, a heating terminal of the heat exchanger is located in the third heat-dissipation air channel, and a cooling terminal of the heat exchanger is located in the second heat-dissipation air channel
Data Source
AI summary
An inverter is provided according to the present disclosure. The inverter is configured with a first direction and a second direction, the first direction and the second direction are vertical to each other, and a length of the inverter in the first direction is greater than a length of the inverter in the second direction; the inverter comprises a direct current device and an inversion alternating current device, and the direct current device and the inversion alternating current device are arranged along the first direction and electrically connected; wherein the direct current device and the inversion alternating current device are arranged alternately; or the inversion alternating current device is arranged collectively and the direct current device is arranged on an outside of the alternating current device.