Fig. 1 Definitions of stationary(a-b) and synchronously rotating(d-q) reference frames
Fig. 3 Modification of voltage vector according to the proposed overmodulation algorithm
Fig. 4 Normalized magnitude and phase angle errors for the proposed overmodulation algorithm
Fig. 5 Control block diagram of sensorless based PMSM driver
Fig. 6 Phase to ground voltage, estimated rotor position and phase current when the voltage vector is limited on circle 1 [2msec/div]
Fig. 7 Phase to ground voltage, estimated rotor position and phase current when the proposed overmodulation is applied [2msec/div]
Fig. 2 Over-modulation regions and voltage synthesis for SVPWM
Table 1. Parameters of permanent magnet synchronous machine
참고문헌
- D. M. Lee, J. W. Jung and S. S. Kwak, "Simple Space Vector PWM Scheme for 3-level NPC Inverters Including the Overmodulation Region", Journal of Power Electronics, pp. 688-696, (2011).
- J. H. Bae, Y. C. Kim, C. Y. Won, J. M. Choi and S. W. Ki, "A Output Voltage Linearization in Overmodulation Region of the Space Vector PWM", Journal of the Institute of Electronics Engineerings of Korea, vol. 36, no. 11, pp. 129-139, (1999).
- D. M. Lee, J. H. Kim, H. S. Yang and J. W. Jung, "A Simple Static Overmodulation Scheme using Space Vector PWM Method", Journal of KIPE, vol. 16, no. 3, pp. 234-241, (2011).
- J. P. Hwang, D. H. Yu, S. P. Ha, J. H. Lee and C. Y. Won, "Analysis of the ripple on the voltage modulation method in the overmodulation regions," Power Electronics Annual Conference, pp. 433-434, (2012).
- Y. Y. Choi and S. H. Kim, "An Overmodulation Strategy for SVPWM Inverter", Power Electronics Annual Conference, pp. 135-138, (2000).