The Kv rating (not to be confused with kilo-volt) is the RPM of the motor (k) per volt (V) with no load. For example, a brushless motor with a Kv rating of 3000 powered by a 12V power source would be capable of 36,000 RPMs (multiply 3000×12).
What do the numbers mean on a brushless motor?
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 I know what power my brushless motor is?
Identify the maximum power (BHP) of the motor. Divide this by 1.5 i.e. 2/3s and multiply by 750 to convert the BHP to watts to determine the output power of the equivalent brushless electric motor.
What do the numbers on RC motors mean?
Brushless motor components
Rotor – the part that rotates and has the magnets mounted in a radial pattern. Stator – the part that does not rotate, and has electromagnets.
How do you spec a brushless motor?
The most important performance specifications for brushless motors are shaft speed, torque, and the design voltage. Shaft speed is the speed at which the output shaft of a motor spins. Shaft speed specs generally refer to the no-load speed, which is the maximum speed the motor can reach when no torque is applied.
What is the Kv rating on a brushless motor?
The Kv rating of a brushless motor is the ratio of the motor’s unloaded rpm to the peak voltage on the wires connected to the coils. Knowing the Kv rating of a motor will help you determine how fast that motor will rotate when a given voltage is applied to it.
What does KV mean on motors?
Kv describes the RPM (revolutions per minute) a motor does per Volt that is put into it. 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. If Kv is like horsepower, then Turns is the physical attribute of a motor.
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. The Kt rating designates the amount of torque a motor will produce given a current.
How is motor power measured?
By taking the voltage and multiplying it by the associated current, the power can be determined. A watt (W) is a unit of power defined as one Joule per second. For a DC source the calculation is simply the voltage times the current: W = V x A.
How do you calculate motor efficiency?
Typical Motor Efficiency Values: Efficiency is simply output (useful) power divided by input power, with the difference being losses due to imperfections in design and other inevitabilities.
How do you read an RC motor?
RC motors are typically listed along with their ‘turn’ and/or ‘Kv’ numbers. Turns (often stated just as T) refers to the number of times the internal wiring wraps around the armature. As a rule of thumb higher turn motors have higher torque and less RPM thus ’55T’ units are suited to RC crawlers.
What does 12T mean on RC Motors?
Twelve turns around each motor pole using triple wires. Three wires are would twelve times around the pole. A 12T double would use two wires wound twelve times and a 12T single a single thicker wire wound twelve times around each rotor pole.
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. Not only is this car stylish, but it also reaches speeds over 100 miles per hour.”
How do I choose a KV motor?
The KV value can be determined by the number of copper wire windings on the stator. Generally the higher number of winds decreases the KV of the motor, while lower number of winds increases the KV. The magnetic strength of the magnets can also affect the KV value, stronger magnets will increase KV.
What is the fastest KV motor?
The 4000 Kv motor is faster – at the same voltage. The 4000 Kv in the BLS models are rated for 2s (7.4v) while the 3600 Kv motor in the BLX is rated for 3s (11.1v). The higher the RPM the faster top speed.
What does KV mean in electricity?
Definition of kilovolt
: a unit of potential difference equal to 1000 volts.