What does kv mean rc

Most electrical topics in RC can be confusing and difficult to understand. Even though we are going to be talking about an RC car in this article, the same principles apply for other RC vehicles. A motors kv constant tells us how many revolution the motor will make in one minute per volt applied. As we increase the voltage to the motor we get more RPM.

However, if we increase the kv of the motor, we get more RPM out even if voltage is held constant. Here is a simple example showing the difference between a kv motor on 4s LiPo A kv motor will spin x Both of these values are the unloaded RPM output of the motor at full speed.

As you can see, the higher kv motor spins a higher amount of total RPM. If we want our RC car to go faster, we simply need the tires to rotate faster. A faster spinning motor surely makes sense if we are trying to get higher axle speed out of the RC car. However, the higher output RPM that we get out of the motor does not come for free. Higher rotational motor speeds suggest that the motor can make more power, but where does this power come from?

Power in watts is equal to voltage multiplied by current. We know that voltage in our example above is held constant, we are not changing it. The only variable that can increase in order to make sense in our power formula is current.

Current by rise. It makes sense for current to increase. An easy way to understand when current is increasing is to consider the load that the motor would be under. Higher load translates to higher current being drawn from the motor. Asking our motor to spin faster increases the amount of work that motor can do. Show offer. Lost your password? Please enter your email address. You will receive mail with link to set new password. Subscribe Button Subscribe.

John Reid. Latest News , Learning Center. What is the Kv rating of an electric motor? Diana Nichols. December 12, at pm. Ron Harris. December 15, at am. Jaime CC. February 9, at pm. Manuel Herz. March 29, at am. February 20, at pm. Point accepted but I think your reading too into the theory. Lower better for bigger, Larger better for smaller. February 26, at pm. Anthony Blighe. March 27, at pm. February 29, at am. Ray DeWeese. March 28, at pm.

May 4, at pm. If its not a 3 phase motor why does it have 3 wires and how does voltage determine the rpm? December 15, at pm. Greg Johnson. June 7, at am. Leo Damian Plowman. September 6, at pm. March 4, at pm. We break the numbers out as follows: [50] [55] - []. Get the latest from Motion RC sale and product announcements.

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