Dual-Source Power Supply Circuit for Stable Control Loads
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Solution Overview
Problem
Existing power supply circuits fail to provide optimal power to both power system and control system electrical circuits due to differing requirements, leading to potential inefficiencies and risks during abnormal conditions.
Innovation Solution
A power supply circuit with a power conversion circuit and OR circuit that utilizes multiple switching elements and inductors to independently supply power from both a battery and a capacitor to the power and control systems, ensuring optimal voltage levels and redundancy for stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single power supply circuit applies terminal voltage directly to both power system and control system electric circuits, then the circuit structure is simple, but the power supply cannot meet the different requirements of the two electric circuits
Solution Approach 1:
The power supply circuit is segmented into two independent power supply paths: one for the power system electric circuit and another for the control system electric circuit. Each path has its own switching elements and control logic, allowing independent optimization of power supply characteristics for each system while maintaining overall circuit functionality.
2Reliability
If the power supply circuit uses separate power supply paths for power system and control system, then the power supply appropriateness is improved, but the circuit complexity increases
Solution Approach 1:
The power supply circuit merges the battery and capacitor power sources into a unified OR circuit architecture with shared control logic. The switching elements and control unit coordinate both power sources to supply either the power system or control system, reducing overall component count while maintaining independent power supply capability for each system.
3Reliability
If the power supply circuit uses OR circuit configuration with multiple switching elements and inductors, then the power supply stability during abnormal conditions is improved, but the device complexity increases
Solution Approach 1:
The capacitor is pre-charged during normal operation when the battery is functioning properly. This preliminary energy storage ensures that when an abnormal condition occurs (such as battery disconnection or voltage drop), the control system can immediately switch to capacitor power supply without interruption, maintaining system stability and preventing resets.
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
Ensures stable and optimal power supply to both actuator and control systems, even during abnormal conditions, reducing the risk of system resets and improving power efficiency and reliability.
Implementation Method 1
a power conversion circuit configured to receive electric power from a first direct-current voltage source and a second direct-current voltage source, and includes a first inductor, a second inductor, and a plurality of switching elements
Data Source
AI summary
A power supply circuit includes a power conversion circuit. A terminal voltage of a first direct-current voltage source and a terminal voltage of a second direct-current voltage source are applied to the power conversion circuit, and the power conversion circuit includes a first inductor, a second inductor, and switching elements. The power supply circuit includes an OR circuit. The OR circuit is a circuit that outputs at least one of electric power of the first direct-current voltage source and electric power of the second direct-current voltage source to a control system electrical load.