Regulated Current Source with Voltage Booster for Varying Resistive Loads
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Solution Overview
Problem
Conventional regulated current sources are inefficient due to power dissipation in current regulators, as they lack separate voltage boosters and current regulators, leading to wastage of energy when driving loads with varying resistance.
Innovation Solution
A regulated current source device is developed, comprising a primary electrical energy source, a controlled voltage booster, and a controller that adjusts the voltage booster's output based on load resistance changes to minimize power dissipation, using a controller to monitor and adjust the voltage drop across the current regulator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a current regulator is used to regulate current through a varying resistive load, then the current is kept constant, but power is dissipated in the current regulator
Solution Approach 1:
The system is divided into two separate functional blocks: a voltage booster that provides the necessary voltage, and a current regulator that controls the current. By segmenting the power supply function, the voltage booster handles the voltage requirements while the current regulator only needs to manage current control with minimal voltage drop, thereby reducing power dissipation in the current regulator.
Solution Approach 2:
A voltage booster is introduced as an intermediary component between the power source and the load. This intermediary provides the necessary voltage boost before the current regulation stage, allowing the current regulator to operate with minimal voltage drop and thus minimizing power loss in the form of heat.
2Loss of energy
If a voltage booster is added to reduce power dissipation, then efficiency is improved, but device complexity increases
Solution Approach 1:
The voltage booster and current regulator are merged into a single integrated power supply unit with a unified control system. The controller manages both the voltage booster and current regulator coordinates, reducing overall system complexity despite adding functional capabilities. This integration allows shared control logic and coordinated operation.
Solution Approach 2:
The system employs dynamic control where the controller continuously monitors load conditions and adjusts both the voltage booster output and current regulator settings in real-time. This dynamic coordination optimizes efficiency across varying load conditions while maintaining simple operational control through a single control interface.
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 enhances efficiency by reducing power dissipation and maintaining simplicity and reliability, making it suitable for biological and medical applications where regulated current is essential.
Implementation Method 1
a voltage booster which receives the input voltage and provides an adjustable voltage from a power-out point
Implementation Method 2
a controller for measuring a voltage drop across the current regulator
Implementation Method 3
a current regulator, which regulates a current through the resistive load according to a predetermined regulated load current
Data Source
AI summary
A voltage booster powered by a primary electrical source for providing an adjustable voltage across the load, while a current regulator in series with the load maintains the desired current. When the voltage drop across the current regulator exceeds an upper threshold, the voltage booster's output voltage is reduced to a lower level to reduce the power dissipated by the current regulator, to improve efficiency. When the voltage drop across the current regulator is less than a lower threshold, the voltage booster output is increased to a higher level. In burst mode operation, the voltage booster output alternates between a full voltage and zero voltage, and an optional capacitor provides voltage across the resistive load during discharge. An optional diode can ensure that the capacitor discharges through the load in cases where the voltage booster output is not floating.