Electric Power Bus Voltage Ripple Reduction via Capacitive Coupling
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Solution Overview
Problem
Voltage ripple in an electric power distribution bus can lead to degradation of electric power consumers, as the reduction in capacitance when a battery is removed causes voltage fluctuations, potentially affecting the operation of sensitive devices.
Innovation Solution
Coupling an electric power consumer with a capacitive input load to the bus when voltage ripple exceeds a threshold, and decoupling its output from other consumers to maintain stable voltage levels, utilizing existing components to reduce ripple and prevent degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the battery is removed from the electric power distribution bus, then the device complexity is reduced, but the voltage ripple increases causing degradation of electric power consumers
Solution Approach 1:
The patent extracts the battery from the electric power distribution bus to simplify the system architecture. By removing the battery while maintaining voltage stability through alternative means (capacitive coupling), the system achieves reduced complexity without sacrificing reliability. This directly addresses the contradiction by taking out the problematic component (battery) while preserving the essential function (voltage stability).
Solution Approach 2:
The patent introduces an intermediary element (capacitive coupling mechanism) between the electric power distribution bus and the electric power consumers. This intermediary provides the necessary voltage stabilization function that previously required the battery, thereby maintaining reliability while allowing the battery to be removed for simplicity.
2Ease of operation
If the voltage of the electric power distribution bus varies by more than a predetermined amount, then the ease of operation is reduced, but the manufacturing precision can be maintained
Solution Approach 1:
The patent changes the operational parameters of the electric power distribution bus by implementing capacitive coupling, which fundamentally alters how voltage is maintained. Instead of relying on battery voltage regulation, the system uses capacitance to smooth voltage variations, thereby improving ease of operation while maintaining manufacturing precision through passive electrical characteristics.
3Loss of substance
If existing components are used to reduce voltage ripple, then the loss of substance is reduced, but the productivity may be affected due to operational constraints
Solution Approach 1:
The patent implements a self-service mechanism where existing capacitive components in the system are utilized to provide voltage ripple reduction. Rather than adding active regulation systems that would reduce efficiency, the system leverages the inherent capacitive properties of existing components to naturally smooth voltage variations, thereby maintaining productivity while reducing substance loss.
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 approach effectively reduces voltage ripple, preventing degradation of electric power consumers and allowing them to continue operating efficiently, with a low implementation cost since existing components are used.
Implementation Method 1
coupling an electric power consumer that includes a capacitive input load to the electric power distribution bus in response to voltage ripple of the electric power distribution bus exceeding a threshold level
Data Source
AI summary
Systems and methods for operating an electric power distribution bus of an electric or hybrid vehicle are described. In one example, an output of an electric power consumer is decoupled from other electric power consumers so that electric current drawn from the electric power distribution bus is lowered while the electric power consumer provides a capacitive load to the electric power distribution bus, thereby reducing voltage ripple associated with the electric power distribution bus.