Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol. Delhi, New Delhi, India
Abstract :
Summary form only given. High efficiency, high power density, compact size, silent operation, high reliability and low wear and tear of the magnet brushless DC (PMBLDC) motor, makes it a suitable choice in many low and medium power applications. Due to these features, PMBLDC motors are widely used in household equipments, industrial tools, heating, ventilation and air conditioning (HVAC), robotics, automation and medical applications. This seminar aims to present power factor correction (PFC) converters for feeding PMBLDC motor drives as a cost effective solution for low power household appliances. The selection of suitable PFC converter for particular application depends upon various aspects such as total number of components of PFC converter, voltage and power rating of BLDC motor, requirement of galvanic isolation, cost and efficiency of the overall system. This work presents various configurations of the PFC converters, which are classified into five different categories of non-isolated PFC converters, bridgeless non-isolated PFC converters, isolated PFC converters, bridgeless isolated PFC converters and integrated and high quality rectifiers. A PFC converter operating in discontinuous conduction mode (DCM) is used to control the PFC converter via an approach of voltage follower; which requires a single voltage sensor for PFC and DC link voltage control. Analysis, design and control of these PFC converters for improvements in power quality at AC mains of the PMBLDC motor drive is presented in this seminar. The speed of PMBLDC motor is controlled by adjusting the DC link voltage of the VSI feeding PMBLDC motor which allows the VSI to operate in fundamental frequency switching for reducing the switching losses in VSI. The other major aspect of the seminar includes simplicity in control, reducing the number of sensors and cost and increasing the overall efficiency of the system.
Keywords :
DC motor drives; domestic appliances; permanent magnet motors; power factor correction; power supply quality; rectifiers; reliability; switching convertors; DC link voltage; DC link voltage control; DCM; HVAC; PFC converter analysis; PFC converter control; PFC converter selection; PMBLDC motor drives; PMBLDC motor efficiency; PMBLDC motor reliability; PMBLDC motor speed; PMBLDC motor wear-tear; VSI; automation application; bridgeless isolated PFC converters; bridgeless nonisolated PFC converters; compact size; discontinuous conduction mode; fundamental frequency switching; galvanic isolation; heating-ventilation-air conditioning; high-quality rectifiers; home appliances; household equipments; industrial tools; integrated rectifiers; low-power household appliances; medical application; permanent magnet brushless DC motor drives; power density; power factor correction converter; power quality improvements; power rating; robotics; single-voltage sensor; switching loss reduction; system cost; system efficiency; voltage follower approach; Brushless DC motors; Permanent magnet motors; Power quality; Seminars; Voltage control;
