Abstract
DC electronic load has a relatively wide range of applications to test and evaluate the steady-state and transient response characteristics of emerging power sources. In this paper, a DC electronic load operating in constant current mode is presented. This device is designed based on Boost topology and can achieve high control accuracy. The experimental results show that the proposed electronic load has high precision and power scalability relative to the traditional resistive load. DOI: http://dx.doi.org/10.5755/j01.eee.20.2.6381
Highlights
DC loads are usually used by power source developers and customers to test and evaluate the steady-state and transient response characteristics of emerging power sources [1], [2]
This paper proposes the use of a Boost DC-DC converter as a variable electronic load to obtain constant current characteristics
To verify the working principle, a low power constant current electronic load based on Boost topology was designed in a laboratory
Summary
DC loads are usually used by power source developers and customers to test and evaluate the steady-state and transient response characteristics of emerging power sources [1], [2]. The usual way to acquire discharging response and polarization curves of battery is through association of many power resistors Such type of testing arrangement is characterized by a stiff and heavy operation with high power losses and large volumes. For the convenience of power expansion and control accuracy, PWM (Pulse Width Modulation) switching circuit topology (usually DC-DC converter) was proposed to implement DC electronic load in this paper Such converters can be directly controlled by computers or implemented by automated controllers to simulate DC real loads at desired current or voltage levels. This paper proposes the use of a Boost DC-DC converter as a variable electronic load to obtain constant current characteristics Such configuration reduces the input current ripple and improves the steady-state accuracy.
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