Voltage Step-Up Control for Vehicle Power Generation Units
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Solution Overview
Problem
Power generation units in motor vehicles often have different performance characteristics due to manufacturing tolerances, leading to uneven current supply to electrical circuits and storage units, making it difficult to charge storage units sufficiently, especially when power generation units are replaced during maintenance.
Innovation Solution
A method and device for regulated voltage increase in a power generation unit that measures the operating voltage and generates a reference variable to vary the load output voltage, using a multifunction controller with a B Sens output to adjust the generator voltage, allowing for calibration after engine restart and accounting for the characteristic curve of each power generation unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional voltage control is used without considering individual generator characteristics, then the control system is simple, but the load output voltage varies unevenly across different power generation units
Solution Approach 1:
The patent applies parameter changes by introducing a calibration value that modifies the reference voltage for each power generation unit based on its individual characteristics. During calibration, the system measures the actual output voltage of each generator and determines a compensating calibration value that adjusts the reference voltage to achieve uniform load output voltage across all units, thereby resolving the voltage uniformity issue without requiring complex hardware modifications.
Solution Approach 2:
The system implements feedback by measuring the actual output voltage of each power generation unit during calibration and using this measurement to determine an appropriate calibration value. This closed-loop approach ensures that each generator's individual variations are compensated for, achieving consistent voltage output across all units while maintaining a relatively simple control architecture.
2Productivity
If standard voltage regulation is applied to all power generation units, then the control method is uniform and simple, but storage units are not charged sufficiently due to uneven current supply
Solution Approach 1:
The patent modifies the control parameter by introducing a calibration-specific reference voltage that is added to the standard reference voltage during calibration mode. This parameter change enables the system to compensate for individual generator characteristics, ensuring sufficient current supply to storage units while maintaining the simplicity of standard voltage regulation during normal operation.
Solution Approach 2:
The system dynamically switches between standard voltage regulation mode and calibration mode. During calibration, the modified reference voltage with calibration value is applied; during normal operation, the standard reference voltage is used. This dynamic approach optimizes charging efficiency when needed while preserving operational simplicity during routine use.
3Reliability
If power generation units are replaced during maintenance, then system reliability is maintained, but the new units have different characteristic curves requiring re-calibration
Solution Approach 1:
The patent implements preliminary action by performing calibration automatically during the generator startup sequence. When a new power generation unit is installed or replaced, the system automatically initiates the calibration process during the next startup, measuring the output voltage and determining the calibration value without requiring manual intervention. This preliminary automatic calibration minimizes downtime and ensures the new unit is properly integrated into the system.
Solution Approach 2:
The calibration system operates autonomously by automatically measuring the output voltage of each power generation unit, calculating the appropriate calibration value, and storing it in memory without requiring manual calibration procedures. This self-service capability significantly reduces the time and effort required when replacing power generation units while maintaining system reliability.
4Productivity
If the load output voltage is increased to compensate for voltage drops, then the charging performance improves, but the risk of overvoltage to consumers increases
Solution Approach 1:
The patent applies local quality by implementing individualized calibration values for each power generation unit based on its specific characteristics. Instead of uniformly increasing the voltage for all units, the system calculates and applies targeted voltage adjustments only where needed to compensate for individual unit variations. This localized approach improves charging performance while preventing excessive voltage increases that could harm consumers.
Solution Approach 2:
The calibration process uses feedback from actual voltage measurements to determine appropriate calibration values. By measuring the actual output voltage of each generator and calculating the difference from the target voltage, the system applies only the necessary voltage compensation rather than blanket increases, thereby improving charging performance while minimizing overvoltage risk to electrical consumers.
Data Source
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AI summary
Method for a controlled voltage boost comprises generating a voltage value as guiding parameter as soon as the operating voltage in a memory device (4) sinks by a voltage difference amount whilst the guiding parameter is reduced by the voltage difference amount. Preferred Features: The load output voltage of a current generating device (3) is boosted depending on the guiding parameter when the operating voltage is reduced.