Inverter Control Board Voltage Detection Layout
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Solution Overview
Problem
Existing inverter control boards face challenges in efficiently arranging voltage detection circuits due to the large difference in operating voltages between high-voltage and low-voltage regions, leading to increased board size and complexity.
Innovation Solution
The inverter control board is designed with distinct high-voltage and low-voltage regions, utilizing insulation regions to connect circuits in an electrically insulated state, and placing the voltage detection circuit between high-side and low-side connection circuits, allowing for efficient arrangement without additional insulation and reducing board size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the voltage detection circuit is arranged on the inverter control board, then the direct-current-side voltage can be detected, but the board size increases due to the large voltage difference between high-voltage and low-voltage regions
Solution Approach 1:
The board is divided into distinct high-voltage and low-voltage regions with separate arrangement areas. The voltage detection circuit is positioned in a specific location that allows it to access both high-voltage signal lines (for voltage detection) and low-voltage control lines, eliminating the need for additional insulation regions and reducing overall board size.
Solution Approach 2:
The patent introduces an insulation structure that allows signal transmission between high-voltage and low-voltage regions. This insulation mechanism enables the voltage detection circuit to receive high-voltage signals while maintaining electrical isolation, allowing compact arrangement without requiring excessive insulation space.
2Reliability
If additional insulation regions are added to connect high-voltage and low-voltage circuits, then electrical insulation is improved, but the board complexity and size increase
Solution Approach 1:
The patent combines the insulation function with the signal transmission function into a single integrated structure. The insulation region is designed to simultaneously provide electrical isolation and allow controlled signal passage between high-voltage and low-voltage circuits, eliminating the need for separate insulation components and reducing overall structural complexity.
Solution Approach 2:
The insulation structure is designed to serve multiple functions: providing electrical isolation between voltage regions, enabling signal transmission from high-voltage to low-voltage circuits, and defining the boundaries of different functional areas. This multi-functional design reduces the number of separate components needed and simplifies the overall board structure.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A detection circuit for detecting a direct-current-side voltage of an inverter that performs conversion between direct current power and alternating current power is appropriately arranged on an inverter control board. A low-voltage region (A1), multiple high-side high-voltage regions (A31), multiple low-side high-voltage regions (A32), and an insulation region (A5) are formed on an inverter control board (9). A circuit in the low-voltage region (A1) and a circuit in each of the high-side high-voltage regions (A31) are connected via a high-side connection circuit (51), and the circuit in the low-voltage region (A1) and a circuit in each of the low-side high-voltage regions (A32) are connected via a low-side connection circuit (52). A voltage detection circuit (6) for detecting a direct-current-side voltage of an inverter (10) is arranged between the high-side connection circuit (51) and the low-side connection circuit (52) that are adjacent to each other.