Transcript 下載/瀏覽Download

Robot and Servo Drive Lab.
A Novel Rotor Configuration and Experimental
Verification of Interior PM
Synchronous Motor for High-Speed Applications
IEEE TRANSACTIONS ON MAGNETICS, VOL. 48, NO. 2, FEBRUARY 2012
By Sung-Il Kim, Young-Kyoun Kim, Geun-Ho Lee,and Jung-Pyo Hong
Professor： Ming-Shyan Wang
Student ： Hao-Chao Lin
Department of Electrical Engineering
Southern Taiwan University of Science and Technology
2016/7/15
Outline









Introduction
CONFIGURATION AND DESIGN SPECIFICATIONS OF
HIGH-SPEED SURFACE-MOUNTED PMSM
ROTOR DESIGN OF HIGH-SPEED IPMSM
Initial Rotor Shape
Experimental Design
Rotor-Shape Optimization
TEST RESULTS AND DISCUSSION
Conclusion
References
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
2
Introduction

Recently, in many industrial applications, such as machine tools, vacuum
pumps, and centrifugal compressors , the case applied to high-speed
machines for miniaturization and weight reduction is growing more and
more.

The application of gearless directly coupled high-speed machines can
prevent problems, such as oil leakage, maintenance costs, and gear losses,
and increase the system reliability by simplifying the structure. Moreover,
noise can also be considerably reduced by eliminating an additional
transmission system.
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
3
Introduction

A permanent-magnet synchronous motor (PMSM) of varied
motors, such as an induction motor and a reluctance motor, is
becoming more and more favored than the high-speed
machine. Due to the nonelectric excitation, rotor losses are
very small, leading to minor thermal rotor expansion and to
improved efficiency.
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
4
CONFIGURATION AND DESIGN SPECIFICATIONS OF
HIGH-SPEED SURFACE-MOUNTED PMSM

The permanent magnet magnetized in the parallel direction is
retained within a sleeve, which has been pressed on the rotor
to withstand the centrifugal stress under high-speed operation.
Especially, the permanent magnet and sleeve are divided as
two parts in order to reduce eddy current loss.
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
5
ROTOR DESIGN OF HIGH-SPEED IPMSM

In this section, on the basis of specifications given in Table I,
the optimal rotor configuration of an IPMSM is designed in
order to obtain better performance than the surface-mounted
2016/7/15
Manufactured stator with three-phase coils. (a) Top view. (b) Side view.
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
6
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
7
Initial Rotor Shape

of poles is restricted for stable control. When the poles are
chosen, the fundamental frequency of the motor at maximum
speed should typically be less than one-tenth of the switching
frequency of an inverter. As a result, the number of IPMSM
poles is limited to two in order to compare the SPMSM for
driving the air blower.
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
8
Experimental Design

The rotor design of an IPMSM is a challenging task because of
the conflict between improved performance and rotor
complexity. For example, the thin rib of IPM machines results
in better electromagnetic performance due to less leakage flux,
but it may not be strong enough to withstand the centrifugal
forces with the rotor speed increase.
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
9
Various rotor configurations of the two-pole IPMSM.
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
10
Partial rotor configurations
according to design factor
variation.
(a) According
to the number of magnet
layers.
(b) According to the number
of bridges
in the second layer.
c) According to pole angle.
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
11
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
12
FEA results of FFD.
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
13
Rotor-Shape Optimization

The aim of the rotor optimization is to secure electrical
performance and mechanical strength. In addition, the amount
of PM should be minimized. Accordingly, as shown in Fig. 6,
the design parameters based on the results of the experimental
design are chosen for the optimization.
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
14
Response surfaces of each approximate model. (a) Average torque
(y'AT ) (b) Max. stress(y'MS ) (c) PM volume(y'MOl )
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
15
Configurations of fabricated IPMSM. (a) Rotor. (b) Rotor assembly. (c) Air blower.
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
16
TEST RESULTS AND DISCUSSION

The fabricated IPMSM are exhibited in Fig. 8. In order to
verify the performance of the IPMSM, tests are carried out as
shown in Fig. 9. The results obtained in the test are shown in
Fig. 10. Input current of the IPMSM is somewhat increased
because of low back-emf than the surface-mounted PMSM,
but the efficiency measured below 25 000 r/min is higher than
the surface-mounted PMSM.
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
17
Conclusion
Even though current vector control is required to obtain
maximum torque, the overall efficiency measured in the
IPMSM is better than that of the SPMSM. In addition, the
amount of permanent magnet actually used in the IPMSM is
reduced by approximately 53% than the SPMSM.

2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
18
References




















[1] A. Binder, T. Schneider, and M. Klohr, “Fixation of buried and surfacemounted magnets in high-speed permanent magnet synchronous
machines,” IEEE Trans. Ind. Appl., vol. 42, no. 4, pp. 1031–1037, Jul./
Aug. 2006.
[2] A. M. EL-Refaie, R. Manzke, and T. M. Jahns, “Application of bi-state
magnetic material to automotive offset-couple IPM starter/alternator
machine,” IEEE Trans. Ind. Appl.., vol. 40, no. 3, pp. 717–725, May/
Jun. 2004.
[3] E. C. Lovelace, T. M. Jahns, T. A. Keim, and J. H. Lang, “Mechanical
design considerations for conventionally laminated, high-speed, interior
PM synchronous machine rotors,” IEEE Trans. Ind. Appl., vol. 40,
no. 3, pp. 806–812, May/Jun. 2004.
[4] J. M. Park, S. I. Kim, J. P. Hong, and J. H. Lee, “Rotor design on
torque ripple reduction for a synchronous reluctance motor with concentrated
winding using response surface methodology,” IEEE Trans.
Magn., vol. 42, no. 10, pp. 3479–3481, Oct. 2006.
[5] B. H. Lee, S. O. Kwon, T. Sun, J. P. Hong, G. H. Lee, and J. Hur,
“Modeling of core loss resistance for d-q equivalent circuit analysis of
IPMSM considering harmonic linkage flux,” IEEE Trans. Magn., vol.
47, no. 5, pp. 1066–1069, May 2011.
2016/7/15
Department of Electrical Engineering
Southern Taiwan University of Science and Technology
19
Thanks for listening
2016/7/15
Department of Electrical Engineering
Robot and Servo Drive Lab.
Southern Taiwan University of Science and Technology
20