Design Of Outer Rotor BLDC Motor For High Volume Low Speed Fan

Dolah, Muhammad Haziq (2018) Design Of Outer Rotor BLDC Motor For High Volume Low Speed Fan. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text (24 Pages) Design Of Outer Rotor BLDC Motor For High Volume Low Speed Fan.pdf - Submitted Version Download (769kB)

Abstract

Nowadays, due to the rapid advance of power electronic controller technology, the used of Brushless Permanent Magnet (BLPM) motor for electric fan application had become a trend due to its advantages in term of power efficiency than induction motor. This is because the rotor speed of BLPM motor is equal to the synchronous speed of the motor, compared to the rotor speed of induction motor that has a slight different of slip speed from the synchronous speed. BLPM motor has two types of motor, which is Brushless DC (BLDC) motor and Brushless AC (BLAC) motor. BLDC motor has trapezoidal back EMF criteria, while the BLAC motor has sinusoidal back EMF criteria. So, in term of speed control, BLDC motor is much simpler to control its speed compared to BLAC. This project will cover about designing an outer rotor BLDC motor for high volume and low speed motor fan that has rated power of 200W, torque of 13N.m and 150 rpm rated speed using Asys Maxwell Rmxprt software. The design steps are started by validating the feasibility of the combination of poles and slot numbers that are used for the motor design. Then, other parameters such as tooth width, tooth height and the tooth pitch of the stator part are designed with appropriate calculation, to be a suitable design based on the fixed desired design parameter of the motor such as the rotor outer diameter, the airgap of the motor and the size of the magnet used. The analysis of the motor performance has been simulated using Ansys Maxwell 2D software. As the result, the design of the motor that has closed value as the desired performance with desired motor dimension is achieved

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