What does the Kv on a brushless motor mean?

What does the Kv on a brushless motor mean?

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.

What determines the torque of a brushless motor?

Since torque is a function of current in a brushless motor, and current is equal to the voltage drop in the circuit divided by the circuit resistance, when the back EMF is equal to the forward applied voltage minus the circuit losses the functional torque of the motor will reach a point where it runs out of the torque …

How much torque does a brushless motor have?

Brushless motors are capable of producing more torque and have a faster peak rotational speed compared to nitro- or gasoline-powered engines. Nitro engines peak at around 46,800 r/min and 2.2 kilowatts (3.0 hp), while a smaller brushless motor can reach 50,000 r/min and 3.7 kilowatts (5.0 hp).

Does lower Kv mean more torque?

Torque is determined by the number of winds on the armature and the strength of the magnets. A low Kv motor has more winds of thinner wire—it will carry more volts at fewer amps, produce higher torque, and swing a bigger prop.

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.

Does lower KV mean more torque?

How do you calculate KV on a motor?

The formula to calculate Kv for a brushed DC motor is to just divide the speed by the generated DC voltage that you measure using your multimeter.

How do you calculate KV to RPM?

The higher the voltage, the faster a motor spins. The Kv rating designates the RPM a motor will spin at full throttle when unloaded given an input voltage. To estimate the RPM of a motor, simply multiply the Kv value by the battery voltage. Kv is in units of RPM/Volt.

Is lower Kv better for crawling?

If you want your vehicle to be slightly faster, you can use an 1800 kV. However, using a 2300 kV will allow you to drive your RC rock crawler both slowly and fast. The higher the KV number, the greater the revolutions per minute.

How do I convert Kv to RPM?

To estimate the RPM of a motor, simply multiply the Kv value by the battery voltage. Kv is in units of RPM/Volt.

What is the difference between torque constant and KV?

The lower a motors Kv value, the higher its Kt value will be. The torque constant of the motor tells us the amount of torque output per amp that we can get out of the motor. Lower Kv motors do have a higher torque constant. However, by nature they are not able to sustain the same amount of current output as a higher Kv motor.

What is the Kv rating of a brushless motor?

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 is the torque constant of a brushless motor?

Brushless Torque Constant, Kt The motor torque constant for brushed DC motors and brushless motors tells you how current relates to torque. In this equation, T is torque, Kt is the torque constant, and I is current. Kt has units of Newton-meters per Amp.

What does KT mean on a brushless motor?

Brushless Torque Constant, Kt. The motor torque constant for brushed DC motors and brushless motors tells you how current relates to torque. In this equation, T is torque, Kt is the torque constant, and I is current. Kt has units of Newton-meters per Amp.