What is the difference between an outrunner and inrunner motor?

There are two types of direct drive frameless torque motors: the outrunner and the inrunner torque motors. In case of an inrunner motor, the rotor is located on the inside of the stator. In case of the outrunner motor, the rotor is located on the outside of the stator.

What are the three wires on a brushless motor?

The two wires of the brushed dc motor can be thought of as forward and reverse. The three wires of brushless can be thought of as 1, 2 and 3. Going forward would be this sequence 1-2, 2-3, 3-1, 1-2, etc. Going backwards would be 1-3, 3-2, 2-1, 1-3, etc.

Why does a brushless DC motor have 3 wires?

BLDCs use three wires which are driven by the ESC with a phase-shifted AC waveform. Each wire’s waveform is shifted by 120 degrees from the other two. This is because BLDC motors are indeed three-phase AC motors, each with usually more than one actual coil per phase.

What is an outrunner electric motor?

The term outrunner refers to a type of brushless DC electric motor primarily used in electrically propelled, radio-controlled model aircraft. This type of motor spins its outer shell around its windings, much like motors found in ordinary CD-ROM computer drives.

What KV means?

Answer: “Kv” refers to the constant velocity of a motor (not to be confused with “kV,” the abbreviation for kilovolt). It is measured by the number of revolutions per minute (rpm) that a motor turns when 1V (one volt) is applied with no load attached to that motor.

Can a brushless motor have 2 wires?

So tiny brushless motors do exist with 2 wires because they have an internal ESC . They can get away with this because of their low power demands.

What does 12N14P mean?

Another important metric describing the inner structure of a brushless motor is its motor configuration, also known as framework. For example 12N14P, where N denotes the number of stator “wire wound” poles and P denotes the number of rotor “permanent magnet” poles[ref].

What is the difference between a brushless inrunner and outrunner motor?

In general for most applications in RC, a brushless inrunner motor has the potential to be more efficient than a brushless outrunner motor. Let’s consider waste heat that a motor outputs.

Do outrunner motors have a lower kV?

Although different motor wind selections (same size motor with Kv options) provides a decent range, outrunner motors will typically have a lower Kv value. This is key in your selection of a brushless motor to directly fit your application. How does an outrunner produce lower Kv?

What factors could affect your brushless motor purchase?

One of the biggest factors that could effect your brushless motor purchase, is a brushless inrunner option or a brushless outrunner. Which motor option would you choose, inrunner or outrunner? Take a look at the image below.

What do the numbers mean on a brushless motor?

Brushless motors use a standard numbering scheme to describe their physical size and kV rating. For example: let’s assume we have a 5055-3000kV Brushless Outrunner Motor. We break the numbers out as follows: [50] [55] – [3000] [50] The first two numbers represent the diameter of the motor’s housing in millimeters; in this example 50mm.