Low-Voltage Operation Circuit for Isolated High-Voltage Control
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Solution Overview
Problem
Existing circuit systems face challenges in efficiently controlling and protecting high-power circuits due to issues such as parasitic parameters, delay differences, and electrical mismatches caused by the parallel connection of high-voltage and low-voltage circuit assemblies.
Innovation Solution
A circuit system comprising a power circuit and an operation circuit, where the operation circuit is electrically connected to the power circuit and configured to control, detect signals, and protect the power circuit. The operation circuit operates at a low voltage, enabling it to manage multiple high-voltage power circuits, thereby reducing errors and adverse effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-voltage and low-voltage circuit assemblies are connected in parallel, then the power circuit can be controlled and protected, but parasitic parameters, delay differences, and electrical mismatches occur
Solution Approach 1:
The patent divides the circuit system into separate high-voltage power circuit domain and low-voltage operation circuit domain, with each domain operating independently at its appropriate voltage level. The operation circuit is further segmented into control unit, detection unit, and protection unit that work cooperatively without direct high-voltage exposure, eliminating parasitic coupling between voltage domains.
Solution Approach 2:
The patent introduces isolation components (such as optocouplers or transformers) as intermediaries between the low-voltage operation circuit and high-voltage power circuit. This intermediary structure allows control signals and detection signals to be transmitted while preventing direct electrical connection, thereby eliminating parasitic parameters and electrical mismatches between different voltage domains.
2Ease of operation
If one operation circuit controls one power circuit, then the control is simple, but the system complexity increases when multiple power circuits need to be controlled
Solution Approach 1:
The patent designs the operation circuit with universal control capabilities that can manage multiple power circuits through a unified control architecture. The control unit generates control signals that can be distributed to multiple power circuits, while the detection unit monitors signals from all power circuits, and the protection unit provides coordinated protection, allowing one operation circuit to efficiently control multiple power circuits without increasing system complexity.
Data Source
AI summary
A circuit system includes a power circuit and an operation circuit. The operation circuit is electrically connected to the power circuit. The operation circuit is configured to control operation of the power circuit, detect a first signal of the power circuit during the operation, and protect the power circuit in response to the first signal.