Power Supply Line Carrier Circuit With Capacitor-Based Half-Voltage Drive
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Solution Overview
Problem
Existing driving circuits for power supply line carriers face issues with heat generation and higher costs due to the use of dividing resistors and DC-DC step-down circuits in low voltage power modules.
Innovation Solution
A driving circuit that includes a control module, switching module, and half-voltage generating module, utilizing energy storage units and diodes to generate and supply half the power supply voltage to the load, eliminating the need for dividing resistors and DC-DC step-down circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a dividing resistor and regulator transistor are used to generate low voltage, then the circuit structure is simpler and cost is lower, but useless power consumption increases and heat generation occurs
Solution Approach 1:
The patent employs periodic charging and discharging of capacitors through switching transistors to generate half-voltage signals. The switching module periodically switches between charging capacitors through diodes and discharging them to the load, creating a ripple voltage that provides the required half-voltage output without continuous power loss.
Solution Approach 2:
The patent changes the voltage parameter by using capacitor charging/discharging cycles to transform full-voltage power supply into half-voltage output. The voltage across capacitors naturally oscillates between full voltage during charging and half voltage during discharging, providing the required voltage transformation without resistive loss.
2Loss of energy
If a DC-DC step-down circuit is used to generate low voltage, then useless power consumption is reduced and power supply utilization efficiency is improved, but circuit complexity and cost increase
Solution Approach 1:
The patent segments the voltage generation function into multiple independent capacitor units (first capacitor, second capacitor, third capacitor, fourth capacitor) that can be charged and discharged independently. This segmentation allows the system to achieve step-down voltage conversion through simple switching operations rather than requiring a complex integrated DC-DC converter.
Solution Approach 2:
The patent introduces diodes as intermediary elements to control current flow direction during capacitor charging and discharging. The diodes act as one-way valves that enable voltage transformation without requiring complex control circuits, simplifying the overall system while maintaining efficient power conversion.
3Temperature
If dividing resistors and regulator transistors are used, then heat generation occurs in the circuit, but if DC-DC step-down circuits are used, then no heat generating occurs
Solution Approach 1:
The patent converts the natural charging/discharging behavior of capacitors, which inherently produces voltage ripple, into a beneficial feature. Instead of treating the voltage fluctuation as noise to be filtered out, the system utilizes this ripple to provide the required half-voltage signal, eliminating the need for power-dissipating voltage regulation and reducing heat generation.
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 solution reduces heat generation and costs while maintaining efficient power supply utilization by using half-voltage generating modules to power loads without additional voltage conversion components.
Implementation Method 1
the first energy storage unit comprises: a first capacitor, one end of the first capacitor connects to the switching module, the charging-and-discharging control unit and the load, respectively, another end of the first capacitor connects to the charging-and-discharging control unit
Implementation Method 2
the charging-and-discharging control unit is applied to controlling the first energy storage unit and the second energy storage unit to be charged in series, and applied to controlling the first energy storage unit and the second energy storage unit to be discharged in parallel
Implementation Method 3
the charging-and-discharging control unit comprises: a first diode, a second diode, and a third diode; wherein, a negative electrode of the first diode connects to the switching module, one end of the first capacitor, and the load, respectively, while a positive electrode of the first diode connects to a negative electrode of the second diode and one end of the second capacitor, respectively
Data Source
AI summary
Disclosed are driving circuit for power supply line carrier and driving method thereof, the driving circuit is applied to driving load to operate, which comprises: a control module, a switching module and a half-voltage generating module; the control module connects to the switching module, applied to outputting control signal to the control switching module to be on or off; the switching module connects with a power supply line, a half-voltage generating module and a load respectively, applied to, when being on, charging the half-voltage generating module with power supply voltage provided by the power supply line and outputting power supply voltage to load; the half-voltage generating module further connects to the load, applied to providing supply voltage to the load when the switching module is off, the load demodulates control signal according to power supply voltage and supply voltage before controlling state thereof according to the control signal.