Дипломная работа - Проектирование 10 кВт преобразователя
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6. Future work
Several of the solutions explained in this master-thesis is today obsolete and can be
replaced with better performing and more sophisticated solutions. However most of these
solutions is by far too time consuming to evaluate and are excluded in favor of the less
sophisticated ones. More attention should be put to minimize the filter need as they
consume both power and space/weight. Additional time can be put to optimize and
evaluate the snubber circuits as they now only are evaluated in the sense of suppressing
voltage transients. All the wires with their respective stray inductance and capacitance
have to be estimated to avoid noise and transients. A light weight transformer could be
used to form a 12-pulse rectifier to remove the need for extensive filter on the input.
When having further knowledge of both the generator supplying power and the motor
consuming power more detailed filters could be designed. All parts also has to be verified
and tested extensively using both simulation and under real circumstances.
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Bibliography
[1] Martin Gårdman Andreas Johansson. Commissioning and Evaluation of an Inverter
Prototype. Dept. of industrial Electrical Engineering and Automation. Lund
University. 2007
[2]
Julius Luukko. Direct torque control of permanent magnet synchronous machines-
analysis and implementation. Lappeenranta 2000.
[3]
István Schmidt, Katalin Vincze, Károly Veszprémi and Balázs Seller. Adaptive
hysteresis current vector control of synchronous servo driver with different
tolerance areas. Department of electrical machines and drives. Budapest University
of technology and economics. June 29, 2000
[4]
Michael O’Neill. The benefits of using a Cree inc. IGBT/SiC Schottky co-pack in
AC inverter applications. Cree inc. September 2006.
[5]
Jim Richmond. Hard-switched silicon GBTs? Cut switching losses in half with
silicon carbide Schottky diodes. Cree Inc.
[6]
S. Vieillard, R. Meuret, High efficiency, high reliability 2 kW inverter for
aeronautical application. Hispano-Suiza, rond point René Ravaud, Moissy-
Camayel, France. 2007. ISBN: 9789075815108
[7]
Fuji IGBT modules application manual. Fuji electric device technology co., LTD.
February 2004.
[8]
Laszlo Balogh. Design and application guide for high speed MOSFET gate drive
circuits.
http://www.powersystems.eetchina.com/PDF/2007JUL/PSCOL_2007JUL26_DRO
P_TA_101.PDF
[9]
International Rectifier. Applications note AN-990. Application characterization of
IGBTs
[10]
International Rectifier. Applications note AN-983. IGBT characteristics.
[11]
Alf Alfredsson, Karl Axel Jaconbsson, Anders Rejminger. Elkrafthandboken,
Elmaskiner, Studentlitteratur, ISBN: 91-47-00066
[12]
Mohan, Undeland, Robbins, Power Electronics, Wiley, ISBN:0-471-22693-9
[13]
IGBT MODULE APPLICATION Manual Hitachi, Ltd. Ref.No.IGBT-01 (Rev.2)
[14]
Mats Alaküla, Power Electronic Control, KFS Lund AB
62
[15]
Designing LC-filters for AC-drives, Bravo Electric Components, Inc.
[16]
Electrolytic capacitors application guide, Evox Rifa.
[17]
AN9011High Input Voltage, Off-line Flyback Switching Power Supply using FSC
IGBT (SGL5N150UF), Fairchild semiconductor
[18]
International Rectifier. Application note AN-1095. Design of the Inverter Output
Filter for Motor Drives with IRAMS Power Modules
[19]
MIL-STD-704, Military Standard, Aircraft Electric Power Characteristics,
Department of Defense USA
[20]
Snubber Considerations for IGBT Applications, International Rectifier
[21]
Failure Rates of HiPak Modules Due to Cosmic Rays, AN-5SYA 2042-02ABB,
ABB, Nando Kaminski
0
100
200
300
400
500
600
Vdc
-600
-400
-200
0
200
400
600
Vab inverter
0 0.005 0.01 0.015 0.02 0.025
-500
-400
-300
-200
-100
0
100
200
300
400
500
Vab Load
Time offset: 0
A
pp
endix A1 - Out
p
ut Characteristics usin
g
Sur
g
e Current Limiter
NO over-shoot
0
100
200
300
400
500
600
Vdc
-600
-400
-200
0
200
400
600
Vab inverter
0 0.002 0.004 0.006 0.008 0.01 0.012 0.014
-500
-400
-300
-200
-100
0
100
200
300
400
500
Vab Load
Time offset: 0
Slight over-shoot
A
pp
endix A2 - Out
p
ut Characteristics usin
g
NO Sur
g
e Current Limiter
0
2
4
6
8
10
12
14
16
18
I Diodes 1 3 5 ave
-5
0
5
10
15
20
25
30
35
40
I Diodes 1 3 5
0 0.005 0.01 0.015 0.02 0.025
-20
-15
-10
-5
0
5
10
15
20
I IGBT 1 3 5
Time offset: 0
Steady state current level
correspond to the calculated
value
Appendix A3 - Rectifier/IGBT Currents using Surge Current Limiter
0
20
40
60
80
100
120
140
I Diodes 1 3 5 ave
-50
0
50
100
150
200
250
300
I Diodes 1 3 5
0 0.002 0.004 0.006 0.008 0.01 0.012
-15
-10
-5
0
5
10
15
20
I IGBT 1 3 5
Time offset: 0
Critical over-shoot
Plot available after
o
ne cycle when
c
alculating RMS
Appendix A4 - Rectifier/IGBT Currents using No Surge Current Limiter
Conn1 Conn2
surge limiter
Discrete,
Ts = 4e-006 s.
output scope
current scope
0.71
Vref (pu)
Vabc (pu)
Vd_ref (pu)
Vabc_inv
m
Voltage Regulator
v
+
-
Vdc
v
+
-
Vab_load
v
+
-
Vab_inv
z
1
UU(E)
UU(E)
A
B
C
+
-
Rectifier
g
A
B
C
+
-
PWM
IGBT Inverter
6
Multimeter
VabcA
B
C
a
b
c
Measure
A
B
C
A
B
C
LC Filter
L1
In RMS
Discrete
RMS value
Signal(s)Pulses
Discrete
PWM Generator
C
v
+
-
A-C
v
+
-
A-B1
v
+
-
A-B
A
B
C
400V, 400 Hz
12 KVA
3-phase scope
A
B
C
10Kw
400 V rms
667 Hz
I Diodes 1 3 5I Diodes 1 3 5I Diodes 1 3 5 I Diodes 1 3 5 aveI Diodes 1 3 5 ave
I IGBT 1 3 5I IGBT 1 3 5I IGBT 1 3 5
A
ppendix B - System
Simulation Model
Appendix C
App
endix C1 - Main Grid Volta
g
e Harmonics without Filter
0.1 0.101 0.102 0.103 0.104 0.105 0.106 0.107 0.108 0.109
-15
-10
-5
0
5
10
15
Time (s)
FFT window: 4 of 80 cycles of selected signal
0 5 10 15 20 25
0
5
10
15
20
25
30
35
Harmonic order
Fundamental (400Hz) = 11.11 , THD= 34.18%
Mag (% of Fundamental)
Appendix C2 - Main Grid Current Harmonics without Filter