Shared Controller Coordination for DC Bus Energy Storage Modules
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Solution Overview
Problem
Existing electrical power systems in vehicles face challenges in managing baseline and pulse loads efficiently, leading to inefficiencies and potential instability due to the use of separate controllers for active rectifiers and energy storage modules, which can result in redundant control algorithms and unnecessary power surges.
Innovation Solution
A shared system controller is introduced to manage the electrical power system, coordinating the bus current controller and DC/DC converters to adjust DC levels on the DC bus, charge, and discharge energy storage devices, eliminating the need for voltage trimming and reducing conflicts between controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate controllers are used for active rectifiers and energy storage modules, then each controller can independently manage its function, but system complexity increases and conflicts between controllers occur
Solution Approach 1:
The patent combines multiple separate controllers (active rectifier controller and energy storage module controller) into a single shared system controller. This shared controller manages both the active rectifier and energy storage modules through unified control logic, eliminating controller conflicts and reducing system complexity while maintaining independent control capabilities for each component.
2Adaptability or versatility
If separate controllers are used for active rectifiers and energy storage modules, then each controller can independently manage its function, but redundant control algorithms are created
Solution Approach 1:
The shared system controller is designed with multi-functional capabilities to perform both active rectifier control and energy storage module control functions. This universal controller eliminates redundant control algorithms by implementing a single set of control logic that can adaptively manage different components, reducing computational overhead and algorithm duplication.
3Adaptability or versatility
If separate controllers are used, then each controller can independently manage its function, but unnecessary power surges occur
Solution Approach 1:
The shared system controller implements coordinated feedback control between the active rectifier and energy storage modules. By monitoring system state and using unified feedback loops, the controller prevents conflicting control actions that would cause power surges, ensuring smooth power flow and system stability while maintaining independent management capabilities.
4Reliability
If voltage trimming is used to coordinate controllers, then power balance can be achieved, but system complexity and potential instability increase
Solution Approach 1:
The patent extracts and eliminates the voltage trimming mechanism from the control system. Instead of using voltage trimming to coordinate between controllers, the shared system controller directly manages power balance through unified control logic, simplifying the control mechanism while maintaining power balance capability and reducing potential instability sources.
Data Source
AI summary
An example electrical power system includes a bus current controller configured to adjust a direct current (DC) provided on a DC bus, and a plurality of energy storage modules (ESMs). Each ESM includes at least one energy storage device, and includes a DC/DC converter configured to control charging of the at least one energy storage device from the DC bus and discharging of the at least one energy storage device onto the DC bus. A shared system controller is configured to control the bus current controller and the plurality of DC/DC converters. A method of controlling an electrical power system is also disclosed.