Comparison of the Design of 3-Pole BLDC Actuators/Motors with a Rotor Based on a Single Permanent Magnet

Abstract

Permanent Magnet (PM) Brushless Direct Current (BLDC) actuators/motors have many advantages over conventional machines, including high efficiency, easy controllability over a wide range of operating speeds, etc. There are many prototypes for such motors; some of them have a very complicated construction, and this ensures their high efficiency. However, in the case of household appliances, the most important thing is simplicity, and, thus, the lowest price of the design and production. This article presents a comparison of computer models of different design solutions for a small PM BLDC motor that uses a rotor in the form of a single ferrite magnet. The analyses were performed by using the finite element method. This paper presents unique self-defined parts of basic PM BLDC actuators. With their help, various design solutions were compared with the PM BLDC motor used in household appliances. The authors proved that the reference device is the lightest one and has a lower cogging torque compared to other actuators, but also has a slightly lower driving torque.

Development of position tracking electric drive system to control BLDC motor working in very low mode for industrial machine application

“…When the motor is loaded, the speed decreases as the load increases. The property of the resisting moment can exist in two forms: the frictional moment and the mechanical moment [2], [3], [8], [16], [19], [26]. We calculate the resisting moment due to friction of the form (1).…”

“…here, 𝛾 = 𝜔𝑡; where t is the time from the beginning of an oscillation period [16]- [18], [24]- [26]. On the basis of the kinematic characteristics of the slow-speed tracking system, we build a model for the tracking system using the BLDC motor in Figure 1.…”

Advanced Electric Battery Power Storage for Motors through the Use of Differential Gears and High Torque for Recirculating Power Generation

“…According to a review of the working model for the generation of renewable electric power to occur in the system [60,61], as shown in Figure 3, it was possible to design a BLDC motor with a size of 7.5 kw/h with 72 volts to create a maximum speed of 6500 RPM and 100 Nm to drive an alternator at a speed of 3000 RPM for two sets of 15 kw/h threephase 400 volts and increase the rate of rotation to be adequate to support the torque according to specification. The voltage of the alternator must be higher than the voltage of the BLDC motor [62]. Installing an inverter system was necessary to control the rotational speed of the spindle shaft through the differential gear [63] and to convert alternating current (AC) from a common power supply with constant voltage and frequency into direct current (DC) by the converter circuit [64].…”