Power Source Device Voltage Boost Circuit
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Solution Overview
Problem
Conventional power source devices consume power from the load due to unstable voltage supplied to the control circuit, leading to power consumption by the control circuit and load even at low power generation, causing the stored voltage to stop rising prematurely.
Innovation Solution
A power source device utilizing a p-channel MOS transistor connected between the boost circuit and the load, where the gate terminal is connected to the storage capacitor, and the source terminal is connected to the boost circuit output, allowing the transistor to control power supply to the load without a power-consuming control circuit, enabling efficient power management at low stored voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a control circuit is used to control power supply to the load, then the power supply can be regulated, but the control circuit itself consumes power from the generator even at low power generation levels
Solution Approach 1:
The patent extracts the control function from an active control circuit and implements it through passive voltage division and transistor switching. The resistor divider network (R1-R4) and transistor Q1-Q2 combination provide automatic control without requiring a powered control circuit, eliminating the parasitic power consumption while maintaining power supply regulation.
Solution Approach 2:
The control mechanism uses the stored voltage itself to control the power supply. The voltage division network and transistor switching are automatically controlled by the voltage level on the storage capacitor, creating a self-regulating system that adjusts power delivery based on stored energy levels without external control signals.
2Productivity
If the stored voltage is low, then power generation is efficient, but the voltage supplied to the load becomes unstable and the load cannot be driven
Solution Approach 1:
The patent changes the voltage parameter through active boosting when low voltage is detected. The boost circuit (comprising inductor L1, diode D1, and capacitor C1) activates when the storage capacitor voltage drops below the threshold, converting the low voltage to a higher stable voltage suitable for driving the load, thus maintaining productivity across varying generation conditions.
Solution Approach 2:
The patent introduces a boost circuit as an intermediary between the storage capacitor and the load. This intermediary component buffers the voltage fluctuations, converting unstable low voltage from the storage capacitor into stable higher voltage for the load, decoupling the load performance from the instantaneous storage voltage level.
3Reliability
If the boost circuit activates at low stored voltage, then the load can be driven, but power is consumed by the boost circuit operation
Solution Approach 1:
The patent implements dynamic threshold-based control where the boost circuit activation voltage threshold is set higher than the minimum operating voltage. The boost circuit activates only when stored voltage drops below this predetermined threshold, providing intermittent rather than continuous operation. This dynamic control reduces unnecessary power consumption by the boost circuit while ensuring the load receives adequate power during critical low-voltage periods.
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 configuration suppresses power consumption by the load at low stored voltage without a power-consuming control circuit, allowing the device to continue driving the load even during extremely low power generation, preventing premature cessation of stored voltage rise.
Implementation Method 1
a storage capacitor configured to store electric power provided from the power generator
Implementation Method 2
a boost circuit configured to boost storage power of the storage capacitor by activation from the voltage detection circuit
Implementation Method 3
a p-channel MOS transistor connected between an output of the boost circuit and the load
Data Source
AI summary
A power source device includes a storage capacitor, a voltage detection circuit, input terminals, and output terminals, further includes: a boost circuit which converts a storage power provided to the input terminals to a boosted power under the condition that a stored voltage becomes equal to or greater than the predetermined voltage, and outputs the boosted power from the output terminals; and a MOS transistor which controls a supply of the boosted power to a load. One of the input terminals is connected to a gate terminal of the MOS transistor, and one of the output terminals is connected to a source terminal of the MOS transistor. The MOS transistor turns on to convert the storage power to the boosted power in the boost circuit, while the MOS transistor turns off not to convert the storage power to the boosted power in the boost circuit.