Evaluation Engineering - 26

POWER SUPPLIES/LOADS

Battery simulation
By using a regenerative AC/DC power supply and programming it to set the voltage
value from the current value, you can create a simple battery simulator (Figure
3) that simulates the IV characteristics
of the battery. The system is for checking
the operation and long-term evaluation
of an on-board charger used in combination with a battery. Simulation is more
reproducible than using an actual battery. In addition, IV curve characteristics
depending on the output current rate and
depth of discharge can be used to simulate specific impedance conditions such
as the end of charge and end of discharge
conditions.
Previously, batteries were simulated
using a combination of power supplies
and electronic loads. However, to switch
between charging and discharging at high
speed, it was necessary to supply current
from the power supply to the electronic
load during charging. Electricity was
wasted, and the power capacity of the

26

EVALUATION ENGINEERING DECEMBER 2019

Figure 3. Block
diagram with
battery simulator.

electronic load needed to be increased,
resulting in larger equipment and higher
purchase costs. In addition, if the electronic load was not regenerative, all the
charging power became heat. Therefore,
there was also a cost for cooling the exhaust heat. These problems can be greatly
improved by using a regenerative battery
simulator (Figure 4).

EV simulator
A simulation solution can simulate an EV
battery without the need for actually connecting a car. It consists of DC power supply, electronic load, communication controller, and control application software.
Simulation is useful when it is difficult to
build an actual vehicle environment, such
as might be required for electric-vehicle



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Evaluation Engineering

Table of Contents for the Digital Edition of Evaluation Engineering

Editorial: Storytelling, Art Boost STEM
By the Numbers
Industry Report
5G: Innovations from Semiconductors to Digital Twins Drive 5G
Switching: Balancing Density and Performance Tradeoffs
Software: Models and Simulation Support Digital Twins and Industrial IoT
RF Test: Instruments Offer Multiple Formfactors, Functions
Digitizers, AWG's: SPECTRUM Executives Comment on Company's 30-Year History
Design for Test: Enabling the Next Leap Forward in Electronic Design
Power Supplies/Loads: Test Solution Targets V2G
Featured Tech
Tech Focus
Cybersecurity: Ramping Up as Electronic Infrastructure Surges
Evaluation Engineering - Cover1
Evaluation Engineering - Cover2
Evaluation Engineering - 1
Evaluation Engineering - 2
Evaluation Engineering - By the Numbers
Evaluation Engineering - Industry Report
Evaluation Engineering - 5
Evaluation Engineering - 5G: Innovations from Semiconductors to Digital Twins Drive 5G
Evaluation Engineering - 7
Evaluation Engineering - 8
Evaluation Engineering - 9
Evaluation Engineering - 10
Evaluation Engineering - 11
Evaluation Engineering - Switching: Balancing Density and Performance Tradeoffs
Evaluation Engineering - 13
Evaluation Engineering - 14
Evaluation Engineering - 15
Evaluation Engineering - Software: Models and Simulation Support Digital Twins and Industrial IoT
Evaluation Engineering - 17
Evaluation Engineering - RF Test: Instruments Offer Multiple Formfactors, Functions
Evaluation Engineering - 19
Evaluation Engineering - 20
Evaluation Engineering - Digitizers, AWG's: SPECTRUM Executives Comment on Company's 30-Year History
Evaluation Engineering - 22
Evaluation Engineering - Design for Test: Enabling the Next Leap Forward in Electronic Design
Evaluation Engineering - 24
Evaluation Engineering - Power Supplies/Loads: Test Solution Targets V2G
Evaluation Engineering - 26
Evaluation Engineering - 27
Evaluation Engineering - Featured Tech
Evaluation Engineering - 29
Evaluation Engineering - Tech Focus
Evaluation Engineering - 31
Evaluation Engineering - Cybersecurity: Ramping Up as Electronic Infrastructure Surges
Evaluation Engineering - Cover3
Evaluation Engineering - Cover4
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