Parallel Power Bus Voltage Matching via Bidirectional Converter
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Solution Overview
Problem
Paralleling power units with unequal voltages in electrical power systems can be inefficient and dangerous, as existing technologies do not effectively manage voltage differences, leading to potential safety hazards and reduced efficiency.
Innovation Solution
The implementation of an electrical power management module with a switch circuit and a bidirectional power converter allows for safe and efficient coupling of power units with different voltages to a parallel power bus, enabling simultaneous charging and discharging operations to balance charge levels and improve system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple power units with unequal voltages are connected directly to a parallel power bus, then the system complexity is reduced, but safety hazards and inefficiency occur due to voltage differences
Solution Approach 1:
The patent introduces a voltage matching circuit as an intermediary component between power units with different voltages and the parallel power bus. This circuit includes voltage detection units that monitor voltage levels and switching units that connect or disconnect power units based on voltage matching conditions, thereby safely enabling parallel operation without direct connection risks
Solution Approach 2:
The patent implements a feedback mechanism where voltage detection units continuously monitor the voltage of each power unit and provide this information to the control unit. The control unit adjusts the switching state based on the voltage feedback, ensuring that only power units with matched voltages are connected to the parallel bus, thus preventing safety hazards
2Ease of operation
If multiple power units with unequal voltages are connected to a parallel power bus, then the ease of operation is improved by allowing flexible power distribution, but efficiency deteriorates due to voltage mismatches
Solution Approach 1:
The patent employs dynamic switching control where the connection state of each power unit to the parallel bus is not fixed but dynamically adjusted based on real-time voltage conditions. The switching unit responds to voltage matching signals to connect or disconnect power units, enabling flexible yet efficient power distribution that adapts to changing system conditions
3Device complexity
If a single large power unit is used to meet power requirements, then the device complexity is reduced, but the weight and size increase significantly
Solution Approach 1:
The patent divides a single large power unit requirement into multiple smaller power units that can operate in parallel. Each power unit has its own voltage detection and switching circuitry, allowing the system to achieve the required total power output while reducing the weight and size of individual units. The modular structure enables easier installation, maintenance, and replacement
4Adaptability or versatility
If multiple power units are connected to a parallel power bus, then the adaptability is improved by allowing simultaneous charging and discharging, but the device complexity increases due to additional control circuits
Solution Approach 1:
The patent designs the voltage matching circuit and switching unit to serve multiple functions: voltage detection, voltage matching control, and bidirectional power flow management. The same control circuitry manages both charging and discharging operations of multiple power units, reducing the need for separate dedicated circuits for each function and thereby limiting the increase in overall system complexity
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 solution enables the safe and efficient operation of multiple power units with varying voltages on a parallel power bus, improving efficiency and safety by allowing for reduced size and weight of individual units, easier manufacturing, installation, and maintenance, while balancing charge levels through simultaneous charging and discharging.
Implementation Method 1
a bypass circuit around the switch circuit, coupleable to the power unit and to the parallel power bus for delivering power from the power unit to the parallel power bus and for charging the power unit from the parallel power bus, the bypass circuit including a bidirectional power converter
Data Source
AI summary
The present disclosure involves an electrical power management module configured to provide electrical power from a power unit to a parallel power bus, comprising: a switch circuit coupleable to the power unit and to the parallel power bus for delivering power from the power unit to the parallel power bus and for charging the power unit from the parallel power bus, the switch circuit changeable between connecting and disconnecting the power unit with the parallel power bus; and a bypass circuit around the switch circuit, coupleable to the power unit and to the parallel power bus for delivering power from the power unit to the parallel power bus and for charging the power unit from the parallel power bus, the bypass circuit comprising a bidirectional power converter.