Predictive direct torque control ASIC with speed feedback controller in motor drive

This paper presents a modified predictive direct torque control (PDTC) application specific integrated circuit (ASIC) with speed feedback controller in motor drive. The proposed PDTC ASIC not only decreases the ripple of hysteresis controller but also enhances the performance of motor controller. Verilog hardware description language (Verilog HDL) is used to implement the hardware architecture; and that an ASIC is fabricated in TSMC 0.18μm process with cell-based design method. Both switching and calculating delay times mainly contribute the ripples which degrade the control quality in motor drive. By using the predictive scheme, we not only improve the ripple issue of the traditional direct torque control technique, but also make the control system more stable by decreasing the time delay in hysteresis controller. According to the measured results, the proposed PDTC ASIC performs with the coverage of 99.10 % and the fault coverage of 98.28 % at the operating frequency of 50 MHz, the supplied voltage of 1.8 V and the power consumption of 218.7 mW.