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VARIABLE-FORM CARRIER-BASED PWM FOR BOOST-VOLTAGE MOTOR DRIVER WITH A CHARGE-PUMP CIRCUIT ABSTRACT: A boost-voltage motor driver with a charge pump (CP) circuit has higher efficiency than the conventional boost-voltage motor driver with a chopper circuit. This paper presents a variable-form carrier-based (VFCB) pulsewidth modulation (PWM) technique for the driver with the CP circuit. This technique has two triangular carriers and a variable-form carrier that is dependent on the voltage command signals. The technique is compared with the space vector modulation (SVM) technique in terms of the number of switching cycles, harmonics in the output voltage, linear modulation range, input power to the CP capacitor, processing time, and efficiency. The VFCB PWM technique is confirmed to operate the driver with the CP circuit at the same performance level as the SVM technique, with shortened processing time. INTRODUCTION: In the applications, the boost-voltage converter transforms the low voltage supplied from batteries, fuel cells, or ultra capacitors to a high voltage to drive the motor. Furthermore, the boost-voltage motor driver offers an effective and highly responsive motor drive. These advantages allow boost-voltage motor drivers to be employed in various other applications. The most commonly used boost-voltage converter used in boost-voltage motor drivers is a chopper circuit with an inductor. Alternatively, a boost-voltage motor driver with the charge pump (CP) circuit has been proposed. These drivers can have output voltage with lower harmonics and operate in higher efficiencies, although they have a more complex circuit configuration than conventional drivers with a chopper circuit. In the Appendix, the driver with the CP circuit is compared with a conventional driver with a chopper circuit under the conditions employed in this study and is confirmed to perform at higher efficiencies. PROPOSED SYSTEM: In the applications, the boost-voltage converter transforms the low voltage supplied from batteries, fuel cells, or ultracapacitors to a high voltage to drive the motor. Furthermore, the boost-voltage motor driver offers an effective and highly responsive motor drive. These advantages allow boost-voltage motor drivers to be employed in various other applications. The most commonly used boost-voltage converter used in boost-voltage motor drivers is a chopper circuit with an inductor. Alternatively, a boost-voltage motor driver with the charge pump (CP) circuit has been proposed. These drivers can have output voltage with lower harmonics and operate in higher efficiencies, although they have a more complex circuit configuration than conventional drivers with a chopper circuit. In the Appendix, the driver with the CP circuit is compared with a conventional driver with a chopper circuit under the conditions employed in this study and is confirmed to perform at higher efficiencies. ADVANTAGES: High efficiency. Increase in the control frequency BLOCK DIAGRAM: TOOLS AND SOFTWARE USED: MPLAB – microcontroller programming. ORCAD – circuit layout. MATLAB/Simulink – Simulation APPLICATIONS: Electrical vehicles. CONCLUSION: This paper has presented the VFCB PWM technique for the boost-voltage motor driver with the CP circuit. This PWM technique uses two triangular carriers and the VF carrier that is dependent on the voltage command signals and generates the signals for the switches of the inverter and CP circuit REFERENCES: [1] J. Dixon, I. Nakashima, E. F. Arcos, and M. Ortuzar, “Electric vehicle using a combination of ultracapacitors and zebra battery,” IEEE Trans. Ind. Electron., vol. 57, no. 3, pp. 943–949, Mar. 2010. [2] A. Khaligh and Z. Li, “Battery, ultracapacitor, fuel cell, hybrid energy storage systems for electric, hybrid electric, fuel cell, plug-in hybrid electric vehicles: State of the art,” IEEE Trans. Veh. Technol., vol. 59, no. 6, pp. 2806–2814, Jul. 2010. [3] A. Allegre et al., “Energy storage system with supercapacitor for an innovative subway,” IEEE Trans. Ind. Electron., vol. 57, no. 12, pp. 4001–4012, Dec. 2010. [4] H. Matsumoto, “Charge strategy in boost motor driver with EDLCs,” IEEE Trans. Power Electron., vol. 25, no. 9, pp. 2276–2286, Sep. 2010. [5] P. J. Grbovic, P. Delarue, P. L. Moigne, and P. Bartholomeus, “The ultracapacitor-based controlled electric drives with braking and ridethrough capability: Overview and analysis,” IEEE Trans. Ind. Electron., vol. 58, no. 3, pp. 925–936, Mar. 2011