Inverter Unit Noise Heat Isolation via Segmented Circuit Boards
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Solution Overview
Problem
Inverter units face challenges with noise and heat transmission from power devices to control circuits due to large current flows, which affect mounting density and overall efficiency.
Innovation Solution
The inverter unit design features separate areas on circuit boards for power devices and capacitors on one board and control circuits on another, with a spacer maintaining a predetermined distance to suppress noise and heat transmission, allowing for increased detection sensitivity and reduced size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If circuit components are arranged separately on multiple circuit boards to suppress noise and heat transmission, then noise and heat influence on control circuit is reduced, but mounting density decreases and device size increases
Solution Approach 1:
The invention divides the inverter unit into distinct functional areas: a first circuit board for power devices and capacitors, and a second circuit board for control circuits. This segmentation physically separates noise-generating components from sensitive control circuits, reducing electromagnetic interference and heat influence while maintaining a compact overall structure.
Solution Approach 2:
The invention introduces a partition wall as an intermediary structure between the first and second circuit boards. This partition wall acts as a barrier that blocks noise and heat transmission from the power device area to the control circuit area, enabling effective isolation without requiring large separation distances that would increase device size.
2Volume of moving object
If mixed arrangement of main circuit and control circuit parts on a single circuit board is implemented, then mounting density increases and device size decreases, but noise transmission and heat generation affect the control circuit
Solution Approach 1:
The invention divides the inverter unit into distinct functional areas: a first circuit board for power devices and capacitors, and a second circuit board for control circuits. This segmentation physically separates noise-generating components from sensitive control circuits, reducing electromagnetic interference and heat influence while maintaining a compact overall structure.
Solution Approach 2:
The invention introduces a partition wall as an intermediary structure between the first and second circuit boards. This partition wall acts as a barrier that blocks noise and heat transmission from the power device area to the control circuit area, enabling effective isolation without requiring large separation distances that would increase device size.
Data Source
AI summary
An inverter unit includes a first circuit board and a second circuit board arranged at a predetermined space so as to face each other. Each of the first circuit board and the second circuit board has a main circuit forming area. A plurality of power devices are mounted in the main circuit forming area of the first circuit board and form a main circuit. A plurality of capacitors are electrically connected to the plurality of the power devices and mounted in the main circuit forming area of the second circuit board. A control circuit controls the operation of the main circuit. The second circuit board includes a control circuit forming area separated from the main circuit forming area. The control circuit includes a first control circuit formed in the control circuit forming area of the second circuit board.