1. What environmental considerations are there?
A: Typical environmental temps for the motor should be in a low
humidity environment with an ambient temperature range of –20 C to
+50 C. BLDC motors do have IP ratings associated to them and
limited customization can be done to increase the IP rating. If
severe conditions require IP ratings of IP54 or higher, a
customized motor construction is required to accommodate this need.
2. Should I use brushless motor or brush motor in my application?
A: It should be important to decide when it comes to determining
which motor you will need for whatever application or project you
are realizing, and your choice will depend on a variety of factors.
Some major issues you will need to consider are target cost, amount
of power you will need and how long you need it to last.
If you have a project or application where you will only need a
motor for short term use or light daily duty, you may prefer a
cheaper one that may wear out more quickly. If your job requires a
motor that will last as long as possible, you will probably want to
consider a BLDC motor, for reasons which will become apparent.
3. What is a brushless motor?
A: A Brushless DC (BLDC) motor is a rotating electric machine where
the stator is a classic three-phase stator like that of an
induction motor and the rotor has surface-mounted permanent
magnets.
BLDC motors often incorporate either internal or external position
sensors to sense the actual rotor position or the position can be
detected without sensors. The BLDC motor is driven by rectangular
voltage strokes coupled with the given rotor position. The
generated stator flux interacts with the rotor flux, which is
generated by a rotor magnet, defines the torque and thus speeds of
the motor. The voltage strokes must be properly applied to the two
phases of the three-phase winding system so that the angle between
the stator flux and the rotor flux is kept close to 90° to get the
maximum generated torque. Due to this fact, the motor requires
electronic control for proper operation.
