| Summary: | 碩士 === 國立臺北科技大學 === 自動化科技研究所 === 101 === The thesis aims to design and implement a direct torque control (DTC) chip based on modified predictive scheme not only to decrease the ripple of the hysteresis controller but also toenhance the performance of motor controller. Verilog hardware description language (HDL) is used to implement the hardware architecture; and that an ASIC is implemented in TSMC 0.18-μm technology with cell-based design style.
In general, the hysteresis controller is used in traditional direct torque control system.However, the hysteresis controller will introduce more ripple in discrete digital system. Notify that both sampling and calculating delay time contribute the ripple response which degrades the control quality in motor system.
The basic principle of this control system is to calculate the stator''s magnetism flux and torque by detecting the three-phase current, three-voltage and the rotor speed.by using the speed PI controller, predictive controller , and coordinate transform circuit , we can have a suitable response in motor speed.
we can not only improve the ripple issue of the traditional direct torque control technique, but also can make the control system more stable by decreasing the time delay in hysteresis controller have been verified.
After the syntax and function, the control system is implemented with the synthesis tool, the auto place & routed tool, and the function simulation tool. Finally, an ASIC is fabricated in 0.18-μm 1P6M CMOS process for three-phase induction motor control system.
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