AO-A073 214 YUCCA INTERNATIONAL INC SCOTTSCALE AZ F/6 9/2
SYSTEM DEBU6 ITEM 0006 OF MiCROPROCESSOR-BASEO POWER CONOITIONE— ETC (U)
MAN 79 OAAK70-76-C-0117
TABLE OF CONTENTS
1.0. 0 SUMMARY 1
2.0. 0 PREFACE 1
3.0. 0 COPYRIGHT PERMISSION 2
4.0. 00 INTRODUCTION 1 2
5.0. 0 INVESTIGATION 2
5.1.0 SYSTEM DEBUG USING EX0RCI5ER DEVELOPMENT SYSTEM .2
5.1.2 SYSTEM DEBUG FREE OF DEVELOPMENT SYSTEM 4
6.0. 0 DISCUSSION 4
7.0. 0 CONCLUSIONS 5
8.0. 0 RECOMMENDATION 5
This report describes the efforts performed under Task 6 of thr U. S. Army
contract no. DAAK70-78-C-0117 to develop a microprocessor-based controller for
the Del CO 15 KW power conditioner.
With the controller hardware successfully interfaced to the software, the vork
under this task, the first phase of the contract has been completed.
The controller hardware and software, developed and tested separately, in previous
tasks using the facilities provided by Motorola Exorcisor development system and
the MC6809 simulator, have now been operated at a system successfully using the
MC6809 part. As the debug progressed, the controller eventually became free of
the development system.
During debug, it was necessary to simulate sense signals to the controller. The
controller performed satisfactorily as intended using these simulated signals.
Further into the program, when the controller is actually interfaced to the Delco
converter, other refinement could be necessary. It is anticipated these v-ould be
minor and should not pose a large task.
Work described in this report was performed by Yucca International, Inc. under the
direction of the U. S. Army Mobility Equipment Research & Development Command. Th’s
completes the sixth task of the first phase of the U. S. Army contract no. DAAK70-
78-C-0117. The Contracting officer's Representative is Dr. David Lee of the U. S.
Army MERADCOM Headquarters at Fort Belvoir, Virginia.
3.0.0 COPYRI GH T PERM ISSION
No copyright permission is required.
s a report of Task 6, the last task of the first phase of an effort to develop
a microprocessor-based power conditioner controller.
The objective of the first phase is to produce a controller that will regulate the
output voltage in the Delco 15 KW power conditioner.
This task. System Debug, will combine and debug the controller hardware and software
which were developed and tested independent of each other in the previous tasks. ^
5.'.0 SYSTEM DEBUG USING EXORCISER DEVELOPMENT SYSTEM
The controller software was tested in Task 5 using the Motorola Exorciser development
system and the MC6809 simulator. This permitted the controller software to be tested
usng the Exorciser memory and 6800 microprocessor. Debug of the hardware and software
combined (system debug) began by interfacing the empty microprocessor socket on the
MPll board of the controller to the Exerciser address, data, and control lines.
The controller program was loaded into Exorciser RAM memory positioned at COOOH to
The controller program, residing in the Exerciser RAM memory (instead of in PROM
memory on the controller MPU board) could be modified easily during debug.
Execution of the controller software in the Exerciser was slowed considerably because
the 6809 simulator was using 6800 instructions to emulate the 6809 instructions.
The controller hardware, constantly "listening" to the addresses on the Exerciser
bus, responded to addresses assigned to the controller hardware during simulation
of the program.
Correct execution of the controller program and correct operation of the controller
hardware was checked simultaneously using the facilities provided by the MC6809
simulator. These included single step, trace breakpoint, and other capabilities.
To effect a closed loop between the controller output signals and input sense
signals, some simulation circuitry was utilized.
This circuitry consisted of adjustable voltaoe sources that were connected to the
converter output voltage and inverter input current sense signals.
The converter SCR simulation circuitry (described in the report on Task 4) was used
to simulate the converter SCR commutation sense signals.
When correct operation of the hardware and software had been verified usina the
facilities of the development system, further debug was suspended until availability
of an MC6809 microprocessor sample.
5.1.2 SYSTEM DEBUG FREE OF DEVELOPMENT SYSTEM
Th(j MC6809 microprocessor and two 2716 PROMS, containing the controller prooram,
were inserted into the controller MPU board to test the stand alone capability
of the controller. Some minor modifications to the hardware were necessary due
to timing problems.
Correct execution of the controller program (free of a development system) was
verified using the Creative Technology, Inc. CT-150 microprocessor analyzer with
a 6809 probe.
The hardware and software necessary to perform voltage regulation of the AC to DC
section of the Delco 15 KW power conditioner has been develooed and debugged to
the extent practical at this time.
The controller lacks the sense sional conditioning circuitry which will attenuate
anc filter the sense signals to levels suitable for measurement by the controller.
The controller has been designed to accept signals from the outputs of optical couplers
which will monitor the commutation of the converter SCP's.
The optical coupler sensing method and the sense signal conditioning circuitry remains
to be developed before voltage regulation of the converter can be performed.
Although the voltage regulation routines were tested using simulation techniques,
other adjustments may be required. When the Delco 15 KW power conditioner becomes
available for testing, at that time the voltane regulation algorithms can be refined
and the sense signal conditioning circuitry and the converter SCR commutation
sensing circuitry can be developed.
7.0. 0 CONCLUSIONS
The controller hardware and software have been combined to form a system and are
operating correctly together.
The capability of the controller to regulate the AC to DC section of the power
conditioner has been developed and tested to the maximum extent practical at this
Further refinement of the voltage regulation algorithm and development of sense
signal conditioning circuitry and SCR commutation sense circuitry will be performed
v/hen the power conditioner Is available for testing.
8.0. 0 RECOMMENDATION
1) The program continued to a workable converter inverter system;
?) The next step with the controller Is to upgrade and retest and correct
any existing problems with the hardware and software discovered during
this task. Once these corrections are made, the system should be Inter-
faced with the Inverter system.