指導教授:龔應時 研究生:曾琮峻 學號:MA320107 Design of an FPGA-Based SPWM Digital Control IC for AC Induction Motor Drives Ming-Fa Tsai Fu-Ching Ke Yu-Hsien Chung Tsung-Hua Yang Huan-Wen Chen Ju-Chi Ni Department of Electrical Engineering, Minghsin University of Science and Technology 指導教授:龔應時 研究生:曾琮峻 學號:MA320107

Outline Abstract Introduction AC induction motor D-Q model construction The architecture and Design of the SPWM digital control IC The Co-simulation environment of Simulink、ModelSim and PSIM Hardware implementation and experimental results Conclusion

Abstract This paper presents the design of an FPGA-based SPWM digital control IC, which is intended for controlling the rotational speed of a three-phase ac induction motor via a three-phase inverter. The architecture of the control IC consists of four major parts: a triangular wave to produce a counter, a three-phase sine-wave look-up table to produce a reference command, a comparator, and a switch dead-time generator. All the four parts have been designed by using VHDL language. The D-Q model of an AC induction motor has also been constructed for verification of the designed SPWM digital control IC in the Simulink, ModelSim, and PSIM cosimulation environment. The designed control IC circuit has been implemented on an Altera Flex 10K FPGA logic device. Simulation and experimental results are shown to verify the viability of the proposed control IC properly.

Introduction In recent years, due to the development of microelectronics technology, use of digital CMOS process technology system, FPGA and CPLD programmable logic elements have appeared. Because of the short design cycle, high-density and programmable, users have attracted widespread attention . Purpose of this paper, using FPGA components, design a SPWM driving control IC. to control an AC induction motor, such that at different frequencies of the command to obtain different speed response.

AC induction motor D-Q model construction A three-phase AC squirrel cage induction motor, the stator and rotor voltage equations. Stator and rotor flux equations.

The (5) - (8) into (1) - (4) can be

The 𝑖 𝑑𝑠 , 𝑖 𝑞𝑠 , 𝑖 𝑑𝑟 , 𝑖 𝑞𝑟 is the AC induction motor dynamic equation of the four variables, to mix (9) - (12), can be.

Three-phase Voltage of motor with stationary reference frame Torque equation Mechanical dynamic equation Three-phase Voltage of motor with stationary reference frame

Voltage relation of three-phase input and the center of the motor V 𝑎𝑛 + V 𝑏𝑛 + V 𝑐𝑛 =0 , into (17)-(18) can be

Let (20) into (17)-(19) can be Three-phase current of motor with stationary reference frame

Dynamic model block diagram of an AC induction motor

In Matlab / Simulink simulation

Frequency of 10Hz (a) the three-phase voltage command waveform (b) waveform diagram of the speed response (c) waveform diagram of the current response

The architecture and Design of the SPWM digital control IC The three-phase sine wave command with a triangular counter comparison, generate a pulse width modulated signal, then generator with an optocoupler isolation circuit via a deadlock time, triggering power crystals ON, OFF Digital SPWM control IC block diagram

The simulation results

The simulation results

The Co-simulation environment of Simulink、ModelSim and PSIM

Figure 13, Analog frequency at 20Hz The three-phase voltage command the Speed response (c) the current response Figure 13, Analog frequency at 10Hz The three-phase voltage command the Speed response (c) the current response

analog frequency in (a) 10Hz (b) 20Hz, the output signal waveform diagram of SPWM

Hardware implementation and experimental results Download it to the Altera Flex 10K100ARC240-1 of execution element FPGA, control the speed of an AC induction motor, the power transistors used for MOSFET-STMicroelectronics GROUP IRFP450 (voltage 500V, resistance to flow 14A) PWM control trigger signal (a) 10 Hz (b) 20Hz Experimental waveforms

SPWM control IC drive current in response to (a) 10Hz (b) 20Hz Experimental waveforms (1A / 100mV)

Conclusion The FPGA-based digital SPWM AC induction motor control IC‘s designed to drive AC induction motor, In the digital control circuit part of its internal architecture consists of a triangular wave generator counter, a three-phase sinusoidal command produces check value table, the three-phase sinusoidal command after comparison with the triangular wave generated trigger signal via a three-phase PWM comparator, Reuse a deadlock SPWM switch conduction time controller delay 1 s ~ 6 s six power switch control signal. Proof of AC induction motor speed will also rise in the frequency increases, and the current is decreased; opposing torque is also decreased, and vice versa, the four parts of the circuit design is VHDL to achieve, And after the establishment of a dynamic model of the AC induction motor simulation to verify the joint simulation environment Simulink, ModelSim, and PSIM, and finally downloaded to an Altera Flex 10K FPGA logic elements experiment.

REFERENCES 1. Kai, Zhang, Yong, Kang, Jian, Xiong, Hui, Zhang and Jian, Chen (2000), “Repetitive waveform correction technique for CVCF-SPWM inverters,” Power Electronics Specialists Conference, 2000. PESC 00. 2000 IEEE 31st Annual., vol. 1, pp. 153 - 158. 2. Tan, Guang-Hui, Zeng, Fanpeng, Ji, Yanchao, Chen, Xi and Wang, Hua (2006), “Novel Single-Stage Isolated Buck-Boost Inverter Based on Improved SPWM Control Method,” Power Electronics and Motion Control Conference, 2006. IPEMC '06. CES/IEEE 5th International., vol. 3, pp. 1 - 5. 3. Xu, Xianglian, Zou, Yunping, Ding, Kai and Liu, Fei (2004), “A STATCOM Based on Cascade Multilevel Inverter with Phase-shift SPWM,” Power System Technology, 2004. PowerCon 2004. 2004 International Conference on, vol. 1, pp. 145 - 149. 4. Nakamori, A., Eguchi, N. and Nakanishi, Y. (1996), “High speed large capacity inverter for power system apparatus,” Decision and Control, Proceedings of the 35th IEEE., vol. 4, pp. 4472 - 4473. 5. Chenghui, Zhang, Yi, Zeng, Lizhi, Liu and Lei, Jia (1994), “Design and application of nonlinear feedback control system for SPWM inverter fed induction motor drive,” Industrial Technology, Proceedings of the IEEE International Conference on, pp. 524 - 527. 6. Profumo, F., Boglietti, A., Griva, G. and Pastorelli, M. (1992), “Space vector and sinusoidal PWM techniques comparison keeping in account the secondary effects,” AFRICON '92 Proceedings., 3rd AFRICON Conference, pp. 394 - 399. 7. Tzou, Y.Y. and Wu, H.J. (1988), “Design and implementation of a multiprocessor-based uninterruptible power supply,” IEEE Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE, vol. 2, pp. 650 - 657. 8. Hewlett Packard, General purpose motion control ICs, Technical data, HCTL-1100 series. 9. Jung, S. -L., Chang, M. -Y., Jyang, J. -Y., Yeh, L. -C. and Tzou, Y. -Y. (1999), “Design and implementation of an FPGA-based control IC for AC-voltage regulation,” IEEE Trans. Power Electron., vol. 14, no. 3, pp. 522-532. 10. 鄒應嶼(2005)，數位電源控制技術的應用與展望，中華民國電力電子協會(TaiPEA)電力電子雙月刊，vol. 3，No. 6，pp. 40-53。 11. HEF4752V - A.C. motor control circuit - Philips Semiconductors, January 1995.12. Brown, S. and Rose, J. (1996), “Architecture of FPGAs and CPLDs: a tutorial,” IEEE Design and Test of Computers, vol. 13, no. 2, pp. 42-57. 13. Bose, B. K., Power Electronics and AC Drives, Prentice-Hall, 1986. 14. Mathworks Inc., Link for ModelSim User’s Guide, 2003. 15. Hatnik, U. and Altmann, S. (2004), “Using ModelSim,Matlab/Simulink and NS for simulation of distributed systems,” International Conference on Parallel Computing in Electrical Engineering (PARELEC’04), pp. 114-119. 16. STMicroelectronics GROUP data sheet, IRFP450 MOSFET, 1998.

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