# How do I know what RPM My brushless motor is?

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Kv actually refers to the RPM of the motor per volt “without a load”. This means that if you have a brushless motor with a Kv rating of 2500 Kv then you would multiply that number by the voltage of your battery to get your total RPM.

## How do you determine the rpm of a brushless motor?

To estimate the RPM of a motor, simply multiply the Kv value by the battery voltage. Kv is in units of RPM/Volt. The more torque a motor needs to produce, the more current it will draw.

## What is the rpm of brushless motor?

The long life span offered by the brushless design can be exploited particularly well using preloaded ball bearings. The EC motors have excellent torque characteristics, high power, and a wide speed range of up to 100,000 rpm. The outstanding controllability of the motors enables high-precision positioning tasks.

## How do I read my brushless motor specs?

Brushless motors are typically categorized by a four-digit number – such as **##. where as the “**” numbers are the stator width and “##” is the stator height. Essentially, the wider and taller the motor is, the larger the numbers are and the more torque it can produce.

## How do you calculate Bldc rpm?

It is explained in that rcgroups article – the number of poles corresponds to the number of voltage cycles per rotation (logical, the voltage changes as many times as many magnets pass in front of the coil). So take the double of measured frequency, divide by the number of poles and multiply by 60 to get RPM value.

## What is the most powerful brushless RC motor?

“The Traxxas XO-1 is the fastest RC car, full stop. The largest brushless motor on offer propels the car from 1 to 60 in 2.5 seconds.

## Is a higher Kv motor better?

Generally speaking the more Kv a motor has, the more RPM and more power. For example, a 9000Kv motor would be faster than a 2200Kv motor. … A higher turn number means more wire and thus more resistance, resulting in a slower motor. So turns with a lower number means a faster motor.

## What is a 540 size motor?

Those numbers refer to the motor diameter. 540 has a diameter of 36mm. 380 has a diameter ~28mm. 280 has a diameter of 24mm. The S, L or XL after the numbers refers to the motor length.

## How do I choose a brushless motor?

How To Select the Best Brushless Motor?

1. Motor Size: One should determine the size of the motor before they are going to purchase or use it. …
2. Speed & RPM Constant: …
3. Winding Size: …
4. Arc Magnets: …
5. Motor Shaft: …
6. Power: …
7. Thrust: …
8. Electronic Speed Controller (ESC):

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## How is motor RPM calculated?

How to Calculate Motor RPM. To calculate RPM for an AC induction motor, you multiply the frequency in Hertz (Hz) by 60 — for the number of seconds in a minute — by two for the negative and positive pulses in a cycle. You then divide by the number of poles the motor has: (Hz x 60 x 2) / number of poles = no-load RPM.

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## Which motor is best for quadcopter?

5 Best Recommendation for Drone Motors

• Coolplay syma x5c-1 x5c x5 motors.
• Parrot AR Drone 2.0 motor.
• Hobbypower A2212 brushless motor.
• Emax Mt2213 brushless motor.

## What is the T rating on a motor?

The higher the kV rating the faster the R.P.M of the motor. The lower the turns, the higher the R.P.M. of the motor. 3.5T means 10,500 RPM. 4.5T means 9,000 RPM.

40 amp as well.

## What is 120 in motor speed formula?

The equation for calculating synchronous speed is: S = 120 f/P speed = constant (120) times frequency of power source (60 Hz) divided by number of poles used in the motor (P).

## What is a stall current?

Summary: Stall Current is the amperage drawn by a motor when its armature is prevented from rotating. The stall current should be less than that of the decoder.

## Why does motor efficiency increase with load?

Efficiency of the motor increases with increasing of load on the shaft , increasing in load causes increase in power factor . Increase in power factor causes more air gap fluxes between the stator and rotor . This will oppose the load current and reduces the armature losses such as copper loss or variable loss .