Voltage Generation Device Inrush Current Reduction
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Solution Overview
Problem
Voltage generation devices experience strong inrush currents due to rapid changes in output voltage, leading to potential damage and reduced service life.
Innovation Solution
A voltage generation device and method that utilize multiple voltage generators and capacitors to adjust output voltage through intermediate values, with capacitors being charged or discharged in advance to reduce inrush currents during voltage transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the output voltage is rapidly changed, then the voltage adjustment speed is improved, but the inrush current increases causing damage and reduced service life
Solution Approach 1:
The patent applies preliminary action by pre-charging capacitors before voltage switching occurs. Specifically, before the output voltage switches from a first voltage to a second voltage, the capacitors are pre-charged to an intermediate voltage value. This preliminary charging action reduces the voltage difference that must be compensated during switching, thereby significantly reducing the inrush current while maintaining relatively fast voltage adjustment capability.
Solution Approach 2:
The patent uses an intermediate voltage value as a mediator during voltage transitions. Instead of directly switching between extreme voltage values (e.g., from maximum to minimum), the system transitions through an intermediate voltage level. This intermediate state acts as a buffer that reduces the stress on the system during transitions, lowering inrush current while still achieving acceptable voltage adjustment speed.
2Reliability
If multiple voltage generators and capacitors are used to reduce inrush current, then the service life and reliability are improved, but the device complexity increases
Solution Approach 1:
The patent applies multi-functionality by designing capacitors that serve dual purposes: they act as energy storage elements for voltage regulation and simultaneously function as inrush current limiting components during voltage transitions. The same capacitors used for maintaining output voltage are also used for pre-charging before switching, eliminating the need for separate inrush current limiting components and reducing overall device complexity.
Solution Approach 2:
The patent segments the voltage transition process into distinct phases: a pre-charging phase where capacitors are charged to an intermediate voltage, and a switching phase where the actual voltage transition occurs. This segmentation allows each phase to be optimized independently, reducing inrush current during switching while maintaining simple control logic.
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
Effectively minimizes inrush currents and associated disturbances, thereby extending the service life and reliability of the voltage generation device.
Implementation Method 1
during a first time period, the first voltage generator provides the first voltage to a first capacitor
Implementation Method 2
The third voltage generator causes the output voltage to change from the second voltage to the third voltage
Implementation Method 3
During a second time period, the first voltage generator and the first capacitor cause the output voltage to change from the third voltage to the first voltage
Data Source
AI summary
A voltage generation device and a voltage generation method are provided. The voltage generation device includes a first voltage generator, a second voltage generator, a third voltage generator and an output voltage generator. The first to third voltage generators respectively generate first to third voltages. The output voltage generator generates an output voltage at an output end according to the first voltage, the second voltage and the third voltage. When the output voltage is converted between the first voltage and the second voltage, during a first time period, the first voltage generator provides the first voltage to a first capacitor, and the third voltage generator causes the output voltage to change from the second voltage to the third voltage. During a second time period, the first voltage generator and the first capacitor cause the output voltage to change from the third voltage to the first voltage.