A Single-Phase Nine-Level Boost Inverter
Abstract
:1. Introduction
2. Proposed Single-Phase Nine-Level Boost Inverter
2.1. Operating Principle of the Proposed Inverter
2.2. Circuit Analysis of the Proposed Inverter
3. Inductor and Capacitor Selections
4. Simulation and Experimental Results
4.1. Simulation Results
4.2. Experimental Results
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Nomenclature
Am | peak amplitude of control waveform ex |
B | boost factor |
CHB | cascade H-bridge |
davg | average duty cycle of the boost inductor in each period Ts |
dL1 | duty cycle of the boost inductor |
dS1 | duty cycle generated by switch S1 |
dS2 | duty cycle generated by switch S2 |
dx | duty cycle generated by switch S1 and S2 |
en | constant voltage |
ex | control waveform |
fout | output frequency |
FC | flying-capacitor |
G | voltage gain |
io | load current |
Io | amplitude of output current |
IL1 | average input current |
ΔIL1 | current ripple of the inductor |
KL | current ripple factor of the inductor |
MI | multilevel inverter |
NLBI | nine-level boost inverter |
NPC | neutral-point-clamped |
PWM | pulse-width modulation |
SC | switched-capacitor |
SCMI | switched-capacitor multilevel inverter |
SDC | switch-diode-capacitor |
Tavg | average time interval of the charging inductor mode during the period Ts |
Ts | period time |
Vab | output voltage |
VB | boost voltage |
Vdc | dc source |
VL | inductor L1 voltage |
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Topology | Literature | Advantages | Disadvantages |
---|---|---|---|
Series-connected DC voltage sources | Proposed in Reference [12] |
|
|
Switched serial/parallel DC voltage sources | Proposed in Reference [13] |
|
|
Additional boost converter | Proposed in References [14,24] |
|
|
Series/parallel connection | Proposed in References [15,18] |
|
|
Based on switched capacitor | Proposed in References [16,17,19,20,21] |
|
|
Cascaded multilevel inverter | Proposed in References [22,23] |
|
|
State | Stage | ON Diodes | ON Switches | Capacitor State | Inductor L1 State | Output Voltage | ||
---|---|---|---|---|---|---|---|---|
C1 | C2 | C3 | ||||||
1 | 1, 7 | S1, S4, T2, T4 | I | I | I | + | 0 | |
2 | 1, 7 | D0, D1, D2 | S4, T2, T4 | + | + | I | − | 0 |
3 | 1, 2, 6, 7 | D1, D2 | S1, S4, T1, T4 | − | − | I | + | VB |
4 | 1, 2, 6, 7 | D0, D1, D2 | S4, T1, T4 | + | + | I | − | VB |
5 | 2, 6 | D0 | S2, S4, S5, T1, T4 | − | − | + | + | 2 VB |
6 | 3, 5 | D0 | S2, S4, T1, T4 | − | − | I | + | 2 VB |
7 | 3, 4, 5 | D1, D2 | S1, S3, T1, T4 | − | − | − | + | 3 VB |
8 | 3, 4, 5 | D0, D1, D2 | S3, T1, T4 | + | + | − | − | 3 VB |
9 | 4 | D0 | S1, S2, S3, T1, T4 | − | − | − | + | 4 VB |
10 | 8, 14 | S1, S4, T2, T4 | I | I | I | + | 0 | |
11 | 8, 14 | D0, D1, D2 | S4, T2, T4 | + | + | I | − | 0 |
12 | 8, 9, 13, 14 | D1, D2, D3 | S1, S4, T2, T3 | − | − | I | + | −VB |
13 | 8, 9, 13, 14 | D0, D1, D2, D3 | S4, T2, T3 | + | + | I | − | −VB |
14 | 9, 14 | D0, D3 | S2, S4, S5, T2, T3 | − | − | + | + | −2 VB |
15 | 10, 12 | D0, D3 | S2, S4, T2, T3 | − | − | I | + | −2 VB |
16 | 10, 11, 12 | D1, D2 | S1, S3, T2, T3 | − | − | − | + | −3 VB |
17 | 10, 11, 12 | D0, D1, D2 | S3, T2, T3 | + | + | − | − | −3 VB |
18 | 11 | D0 | S1, S2, S3, T2, T3 | − | − | − | + | −4 VB |
Parameter | Value | |
---|---|---|
Power rating | 350 W | |
Input voltage (Vdc) | 24 V | |
Output voltage (Vab) | 110 Vrms/50 Hz | |
Carrier ware frequency (fs) | 15 kHz | |
Inductors | L1 | 2 mH |
Lf | 1 mH | |
Capacitors | C1, C2, C3 | 2200 µF/200 V |
Cf | 1 µF | |
Power switches | S1, S2, S3, S4 | 47N60C3 |
S5 | G40N60 | |
T1, T2, T3, T4 | G40N120 | |
Diodes (D0, D1, D2, D3) | DSEI60-06A | |
Gate drives | TLP250 (Photo-coupler) |
Data from | Vab (V) | ΔVab (%) | B | VC1 and VC2 (V) | VC3 (V) |
---|---|---|---|---|---|
Theory | 156.2 | 0 | 2.7 | 65 | 130 |
Simulation | 152.2 | 2.56 | 2.7 | 64.6 | 122.3 |
Experiment | 110 | 29.57 | 2.17 | 52.2 | 92.5 |
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Vo, D.-V.; Nguyen, M.-K.; Do, D.-T.; Choi, Y.-O. A Single-Phase Nine-Level Boost Inverter. Energies 2019, 12, 394. https://doi.org/10.3390/en12030394
Vo D-V, Nguyen M-K, Do D-T, Choi Y-O. A Single-Phase Nine-Level Boost Inverter. Energies. 2019; 12(3):394. https://doi.org/10.3390/en12030394
Chicago/Turabian StyleVo, Dai-Van, Minh-Khai Nguyen, Duc-Tri Do, and Youn-Ok Choi. 2019. "A Single-Phase Nine-Level Boost Inverter" Energies 12, no. 3: 394. https://doi.org/10.3390/en12030394