Performance and cost comparison of PM BLDC motors for ceiling fan

Abstract

This paper presents a comparative study of performance and cost of three phase permanent magnet brushless DC (PM BLDC) motor for ceiling fan using bonded NdFeB and ferrite magnets. PM BLDC motors are designed for an output power of 22W. The output power is calculated by measuring the blade characteristic of the fan. Weight & cost of active materials in both designs are compared. It is shown that even though weight of ferrite motor is approximately 1.47 times that of bonded NdFeB motor, but overall cost of the motor is only 77.8% that of bonded NdFeB motor. Also, it is possible to achieve comparable efficiency using ferrite magnets.

Comparison between a Double Excitation Synchronous Machine and a Permanent Magnet Synchronous Machine according to various constant power speed ranges

“…The machine cost is calculated based on normalized values by assuming unit cost (cost per kilogram active material) are I, 6 and 7 for iron, copper and ferrite permanent magnet (PM), respectively [18]. The loss is the sum of the copper losses, core losses, and power electronics losses at the base (1547 rpm) and maximum speeds.…”

Vector control implementation in field programmable gate array for 200 kHz GaN‐based motor drive systems

“…Thus, the implementation of the motor vector control algorithm in FPGA to achieve hardware acceleration is an excellent method. In addition to reducing the algorithm running speed to within 1 µs, the FPGA is insensitive to external interference [8, 9].…”

DC Home Appliances for DC Distribution System

“…So no need of carbon brushes to supply the current which makes it maintenance free. But because of the presence of magnet, electronics and sensor, BLDC motor is costly than induction and universal motor [15]. With the adoption of DC grid and BLDC motor in industrial and residential appliances, the cost will definitely be reduced in future.…”