Modular Permanent Magnet Synchronous Machine with Low Space Harmonic Content
Abstract
:1. Introduction
2. Machine Topology
3. Winding MMF and Winding Factors
3.1. MMF of Winding-I
3.2. MMF of Winding-II
3.3. MMF of the Entire Winding
3.4. Winding Factor
3.5. Selection of Coil Side Turns
4. Electromagnetic Characteristics
4.1. No-Load Back EMF
4.2. Cogging Torque
4.3. Armature Reaction Field
4.4. On-Load Torque
4.5. Loss and Efficiency
4.6. Power Factor
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Coil Side MMF Vector | Modulus | Angle | |
---|---|---|---|
Phase A1 | V1 | 0 | |
V13 | |||
V15 | |||
V3 | |||
Phase A2 | V16 | ||
V4 | |||
V2 | |||
V14 |
Harmonic Order | Proposed Machine | Conventional Machine | ||
---|---|---|---|---|
1 | 0.354 | 0.0114 | 0.259 | 0 |
2 | 0 | 0 | 0 | 0 |
3 | 0.729 | 0 | 0.707 | 0 |
4 | 0 | 0 | 0 | 0 |
5 | 0.968 | 0.968 | 0.966 | 0.966 |
6 | 0 | 0 | 0 | 0 |
7 | 0.968 | 0 | 0.966 | 0.966 |
8 | 0 | 0 | 0 | 0 |
9 | 0.729 | 0 | 0.707 | 0 |
10 | 0 | 0 | 0 | 0 |
11 | 0.354 | 0.354 | 0.259 | 0 |
12 | 0 | 0 | 0 | 0 |
13 | 0.354 | 0.354 | 0.259 | 0 |
14 | 0 | 0 | 0 | 0 |
15 | 0.729 | 0 | 0.707 | 0 |
16 | 0 | 0 | 0 | 0 |
17 | 0.968 | 0 | 0.966 | 0.966 |
18 | 0 | 0 | 0 | 0 |
19 | 0.968 | 0.968 | 0.966 | 0.966 |
Proposed Machine | Conventional Machine | |
---|---|---|
Stator slot number | 24 | 12 |
Rotor pole number | 10 | |
Stator outer diameter (mm) | 150 | |
Stator yoke thickness (mm) | hy1 = 7.755, hy2 = 9 | 9 |
Stator slot opening width (mm) | 3.5 | 4.8 |
Air gap length (mm) | 0.5 | |
PM thickness (mm) | 2 | |
Pole arc coefficient | 0.694 | |
Rotor core thickness (mm) | 15 | |
Active length (mm) | 40 | |
Number of turns in series per phase | 50 | |
Number of parallel branches | 1 | |
PM material | N42SH | |
Stator core material | 50JNE470 | |
Rotor core material | Solid steel | |
Stator frame material | Austenitic stainless steel | |
Rated speed (rpm) | 2400 | |
Rated phase current in RMS value (A) | 15 |
Proposed Machine | Conventional Machine | |
---|---|---|
Average torque (Nm) | 15.50 | 15.18 |
Torque ripple | 10.70% | 12.39% |
Proposed Machine | Conventional Machine | |
---|---|---|
Stator core loss (W) | 111.51 | 119.1 |
Stator frame loss (W) | 0.59 | 0.82 |
Copper loss (W) | 32.38 | 29.03 |
PM loss (W) | 25 | 31.6 |
Rotor core loss (W) | 42.37 | 111.33 |
Total loss (W) | 211.85 | 291.88 |
Output power (W) | 3895.57 | 3815.15 |
Efficiency | 94.56% | 92.35% |
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Wang, K.; Lin, H. Modular Permanent Magnet Synchronous Machine with Low Space Harmonic Content. Energies 2020, 13, 3924. https://doi.org/10.3390/en13153924
Wang K, Lin H. Modular Permanent Magnet Synchronous Machine with Low Space Harmonic Content. Energies. 2020; 13(15):3924. https://doi.org/10.3390/en13153924
Chicago/Turabian StyleWang, Keyi, and Heyun Lin. 2020. "Modular Permanent Magnet Synchronous Machine with Low Space Harmonic Content" Energies 13, no. 15: 3924. https://doi.org/10.3390/en13153924