Warranty:3years

Place of Origin:Guangdong, China

Brand NameGo-Gold

Model Number:KG-6121-001

Usage:FAN, Electric Fan

Type:Brushless Motor

Torque:customised

Construction:Permanent Magnet

Commutation:Brushless

Protect Feature:Totally Enclosed

Structural diagram

The fan motor has the advantages of small Moment of inertia, large locked rotor moment, small starting voltage and time constant, and large overload capacity. In addition, the fan motor can achieve low speed and high torque, and can withstand frequent braking and forward and reverse rotation.

What are the advantages of fan motors?

1. The low-priced fan motor not only has a large starting torque and a wide operating range, but also has no self rotation phenomenon, making it a worthwhile choice.

Compared with traditional stepper motors, professional fan motors require higher control accuracy to meet the requirements of precise equipment operation.

3. The fan motor can ensure normal operation and output rated torque within the rated speed of the motor, while displaying a constant power output above the rated speed.

Three different geometrical arrangements for permanent magnet motors:

1. Surface Mounted Magnets, Conventional Stator

2. Surface Mounted Magnets, Air-Gap Stator Winding

3. Internal Magnets (Flux Concentrating).

After a qualitative discussion of these geometries, we will discuss the elementary rating parameters of the machine and show how to arrive at a rating and how to estimate the torque and power vs. speed capability of the motor. Then we will discuss how the machine geometry can be used to estimate both the elementary rating parameters and the parameters used to make more detailed estimates of the machine performance. Some of the more involved mathematical derivations are contained in appendices to this note.

Brushless DC Motor

Motor Morphologies

There are, of course, many ways of building permanent magnet motors, but we will consider only a few in this note.

Actually, once these are understood, rating evaluations of most other geometrical arrangements should be fairly straightforward.

It should be understood that the “rotor inside” vs. “rotor outside” distinction is in fact trivial, with very few exceptions, which we will note.

The basic magnetic morphology of the motor with magnets mounted on the surface of the rotor and an otherwise conventional stator winding. This sketch does not show some of the important mechanical aspects of the machine, such as the means for fastening the permanent magnets to the rotor, so one should look at it with a bit of caution. In addition, this sketch and the other sketches to follow are not necessarily to a scale that would result in workable machines.