IEEE Power Electronics Magazine - December 2022 - 29

The thermal measurement unit consists
of temperature sensors based on
optic fibers and thermal couples.
Mission Profile-Based Motor Drive
Emulator
For motor drives, a mission profile
typically consists of the load profiles
(e.g., speed and torque) that occur on
the machine side, the grid-side conditions
(e.g., voltage, frequency), and
environmental profiles (e.g., ambient
temperature, relative humidity).
These factors will influence the electrical-thermal
stresses to which the
drives are subject and, therefore, the
reliability. Thus, a realistic emulation
Using a converterbased
machine
emulator removes the
need for installing an
actual electric
machine and can
conveniently perform
tests with different
types of motors.
of the inverter mission profiles is needed to identify possible
issues during the early stage of the product development
cycle. A mission profile-based motor drive emulator
has been developed based on the improvement of previously
proposed concepts in [14] and [15]. Figure 6 shows
the system configuration and photos of the testing system.
Each unit shown in Figure 6(b) is designed for up to 50 kW
under long-term testing and up to 100 kW under short-term
testing. It can help investigate the
impact of different critical parameters
(e.g., mission profile, control algorithm,
grid disturbance, etc.) on the
motor drive efficiency, thermal stress,
dynamic behavior, and degradation.
The DUT can be connected directly
to the grid or a grid simulator at its ac
side. The grid simulator can emulate
various grid characteristics, such as
voltage amplitude and phase imbalances,
frequency variation, and fault
operation. On the load side of the
DUT, a four-quadrant power converter
is used to emulate the machine's
dynamic behavior. Using a converterbased
machine emulator removes the
need for installing an actual electrical machine and can
conveniently perform tests with different types of motors.
It is achieved through advanced emulator control strategies
and detailed mathematical models that can replicate
the machine's dynamic electrical behavior based on input
speed/torque profiles and machine parameters.
The control of the testing system is implemented by
DSP, implying a reduced cost compared to commercially
FIG 6 System architecture and photos of the motor drive mission profile emulators. (a) Circuit architecture of the developed motor
drive mission profile emulator. (b) Photos of the motor drive mission profile emulators (left: different sub-systems; right: six units
of the testing systems).
December 2022 z IEEE POWER ELECTRONICS MAGAZINE 29

IEEE Power Electronics Magazine - December 2022

Table of Contents for the Digital Edition of IEEE Power Electronics Magazine - December 2022

Contents
IEEE Power Electronics Magazine - December 2022 - Cover1
IEEE Power Electronics Magazine - December 2022 - Cover2
IEEE Power Electronics Magazine - December 2022 - Contents
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