What does Kv mean on RC motor?

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.

How do you calculate Kv to RPM?

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

Do lower Kv motors have more torque?

For a given battery voltage: Lower Kv = More torque for the same current – True. Lower Kv = Lower RPM and bigger usually more efficient props – True.

How do I choose a KV motor?

Choosing the correct KV is very important, it’s critical for the motor operation and high motor performance which is critical for the project. There are few things that determine the top speed: Battery voltage, gear ratio (if any), wheel size ( if any) and the motor KV.

Is a lower Kv motor faster?

The kV rating is the RPM of the motor with no load, not the kilo-volt. A motor that has a higher kV will have more top end speed, but not as much Torque. A motor with a lower kV will have more power and will accelerate faster.

How many kV is a 8.5 turn motor?

A 5000 KV motor is a 5000 KV motor. A Novak 8.5 “turn” is rated at 5000 KV but another manufactures 8.5 may be different as most do not post their KV rating.

How is Kv motor measured?

The unit for Kv is RPM/V and it can be estimated by dividing the rotation speed of the unloaded motor with the applied voltage.

How do I choose a KV RC motor?

If a kv rating is used, then you need to choose a motor with a lower kv value than the limit. Other ESC related factors to take into consideration include the size of the ESC, making sure it fits properly into your car.

How does KV affect torque?

Kv allows you to get a handle on the torque that can be expected from a particular motor. 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.