Divided DC Power Distribution for Isolating Reactive Loads
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Solution Overview
Problem
Heavy work machines require significant power for their operations, and the use of diesel engines poses challenges in enclosed mining spaces due to exhaust removal and pollutant emission, while electrical power systems face issues with battery availability and power distribution efficiency.
Innovation Solution
A direct current power system with multiple battery banks and a power distribution unit (PDU) that allows for mode switching and isolation of reactive loads, enabling efficient power distribution and utilization of secondary batteries when primary power is unavailable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If diesel engines are used to provide power, then significant power is available for heavy work machines, but exhaust removal and pollutant emission become problematic in enclosed mining spaces
Solution Approach 1:
The patent replaces the diesel engine mechanical power system with an electrical power system using battery banks. The heavy work machine originally powered by a diesel engine is converted to an electrically-powered machine, eliminating exhaust emissions while maintaining the required power output for mining operations.
2Object-affected harmful factors
If batteries are used to provide electrical power, then exhaust emissions are eliminated, but battery availability and power distribution efficiency become issues
Solution Approach 1:
The patent divides the electrical power system into multiple separate battery banks (first battery bank, second battery bank, and secondary battery) instead of using a single battery system. This segmentation allows the machine to operate with one battery bank while another is being charged or replaced, ensuring continuous power availability and improved system reliability.
3Reliability
If multiple battery banks are used to improve reliability, then battery availability increases, but system complexity increases
Solution Approach 1:
The patent implements a dynamic power distribution system with a controller that automatically switches between different battery banks based on their charge states and operational needs. The system can dynamically reconfigure which battery bank powers which reactive load, optimizing power distribution while managing the complexity through automated control rather than manual intervention.
4Adaptability or versatility
If reactive loads are connected to multiple battery banks, then power distribution flexibility increases, but resonance issues occur
Solution Approach 1:
The patent extracts or isolates reactive loads from the common electrical bus by connecting them through separate DC-DC converters to individual battery banks. This separation prevents resonance issues that would occur if multiple reactive loads were connected directly to a common bus, while still maintaining power distribution flexibility through the controller's ability to allocate different reactive loads to different battery banks as needed.
Data Source
AI summary
A work machine using a direct current power system that isolates reactive loads is described herein. The work machine uses a machine power distribution unit that receives direct current power from two or more battery banks of a power unit, whereby each of the battery banks deliver electrical power on a separate direct current bus. A machine power distribution unit of the work machine receives the electrical power from the battery and is used to isolate the power using bus connectors. One of the battery banks provides power to one direct current bus of the work machine and another battery bank provides power to another direct current bus of the work machine. A reactive load serviced by one of the battery banks is electrically disconnected from another reactive load serviced by the other battery bank.