A Six-step Inverter Drive of a Powered Wheelchair

• Main Authors: Chih-Hsiang Chiu, 邱智翔
• Other Authors: Wu-Chung Su
• Format: Others
• Language: en_US
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/62977738640188907640

碩士 === 國立中興大學 === 電機工程學系 === 93 === This thesis presents a new design of DC motor drive for power wheelchair control. The proposed circuit topology only requires six power electric switches to accomplish all behavior of a wheelchair and can be implemented by an IGBT package module. The system is driven by PWM(Pulse Width Modification) signal. Due to the inherent defects of the drive, there may be vertical conduction and torque reduction problems when driving the wheelchair. We arrange the on-off timing of PWM skillfully to overcome these problems. Two different devices are used to produce PWM signals, DSP(Digital Signal Processor) and FPGA(Field Programmable Gate Array). The drive not only performs satisfyingly both in simulation and practice, but also reduces the prime cost and the package volume significantly