IEEE Power Electronics Magazine - September 2020 - 56

To dc Negative
F2

Fuse

Bus-

To Phase A
B
Fuse

VR3
Ag

Bus-

TA8

TA3

R61

TA2

9
A3

C79

A2a
L1

La TB8

EU
EV

TE6

V
IEEE POWER ELECTRONICS MAGAZINE

z September 2020

FIG 6 Wire configuration of the main power circuit for the PMSM drive.

C77
-

TE1

TB6 TB5

TA4

TA6 TA5

TE2 I
C

TB4

B2a

TA7
TB3 TB2

B3
Cb

C78

TB7

C80
Cc
Lc

C2a

C3
TC4
D3
C76

+
-

TD2

TA1 VR2
8 Relay
5

TB1 VR1
7

TC1
TC2

TD3 TD1
ID
TD6 TD5

Two Case Studies

The Kit is equipped with automatic code generation, as
illustrated in Figure 3. The software code or the source
code can be developed in the MathWorks modeling environment, i.e., with MATLAB® and Simulink®, which is a
graphical programming environment so there is no need
for users to learn sophisticated programming skills.
Through MathWorks Embedded Coder®, the target support for TI C2000 and the link to TI Code Composer StudioTM (CCS), ANSI/ISO C/C++ codes can be automatically
generated for TI CCS. Then, through the compile & link
process in the TI CCS environment, executive codes can
be generated for downloading to TI C2000 ControlCARD
in the Kit. More features about automatic code generation can be found in [6].
It is worth noting that there is no need for users to touch
any C/C++ or executive codes during software development. The control algorithms can be pre-verified in the
MATLAB/Simulink environment based on simulations.
The same control algorithms can be inserted into a provided software code template as illustrated in Figure 4.
After configuring the measurement interfaces, protection
thresholds, PWM channels, DAC channels, and communication channels, the code can be downloaded to the Kit,
which makes it possible to obtain experimental results
within hours. Note that any signals inside the code, including the external signals measured, can be monitored with
oscilloscopes through DAC channels and in MATLAB/
Simulink through RS485 communication. A host graphical
user interface (GUI) file in MATLAB/Simulink is provided
for this purpose.

Fuse

Bus+

To Phase B

To Phase C

To dc Positive

Automatic Code Generation

I. AC Motor Drive
The ac motor drive system for a permanent magnet synchronous motor (PMSM) is shown in Figure 5, where the
Kit is configured as a three-phase motor controller to drive
an Anaheim Automation EMJ-04 PMSM. A 60 V dc source
is used to power the dc bus of the Kit. An AmpFlow E30150 dc generator powering four parallel-connected resistors (total 0.25 X) is used as the mechanical load for the
PMSM. An oscilloscope is used to monitor and record system operation waveforms through the DAC outputs from
the Kit, with additional data monitored on a host computer
through RS485. The quadrature encoder pulse (QEP) interface on the Kit is used to measure the rotor position angle.
The wire configuration of the main power circuit for the
PMSM drive is shown in Figure 6, where the LC filters are
not used. This can improve the accuracy when calibrating
the rotor position. The PMSM is directly connected to the
three outputs of the IGBT module after the current sensors.
The back EMF of line-line voltages vab and vca are measured
through sensing points between A2a and A3, and between
C2a and C3, respectively. The inductors do not affect the
voltage measurement, because there are no currents

IEEE Power Electronics Magazine - September 2020

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