Contents
Is less kV better?
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. So turns with a lower number means a faster motor. The turn rating is inversely proportional to the power generated by the motor.
What is the benefit of a higher voltage battery?
A higher voltage system allows a lower current to be used when charging the battery, which reduces overheating and allows better power retention in the system. This power can be used towards a longer driving range. Higher voltage systems also offer a number of key weight- and mass-saving advantages.
What does high voltage do to a motor?
High voltage on a motor tends to push the magnetic portion of the motor into saturation. This causes the motor to draw excessive current in an effort to magnetize the iron beyond the point where magnetizing is practical. Motors will tolerate a certain change in voltage above the design voltage.
Does lower kV mean more 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.
Do higher volts mean more power?
There are multiple ways to get there. As long as you can draw enough current (amps) from the battery, you can get the same amount of power out of many voltages. So theoretically, the higher voltage doesn’t mean more power in and of itself. Voltage numbers like 40V, 80V, and 120V often represent peak (max) volts.
Does higher voltage mean faster motor?
Increasing the voltage will not directly increase the current, but the load torque may increase due to increased speed and that would increase the current. If the motor draws rated current at 7.4 volts with the propellor you have, a current increase of nearly 50 percent will destroy the motor pretty quickly.
What does 12 turn motor mean?
A 12 turn motor will be tons faster and will drain a battery faster . Just as he said. a twelve turn motor will have more RPM, less torque, and draw more current. The number or turns refers toi the number of times the wire is warpped around your armature in the motor.
Are Brushless RC cars faster?
The powerful 4000KV brushless motor can power the car to speeds over 60 mph!
Which is better a high kV or low Kv motor?
A high Kv motor has fewer winds of thicker wire that carry more amps at fewer volts and spin a smaller prop at high revolutions. Knowing the Kv rating of a motor is helpful to determine which motor belongs in which aircraft.
How is the torque of a Kv motor determined?
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.
Why do you change the KV on a RotorDrone?
For example, a 980Kv motor powered by an 11.1V battery would spin at 10,878 rpm (980 x 11.1) with no load. A change in voltage will change the rpm and will require changing the propeller to avoid overloading the motor. Kv allows you to get a handle on the torque that can be expected from a particular motor.
What is the Kv rating of a Hyperion motor?
Compare this with a Hyperion 3025/8 – that is the same size motor physically (armature 30mm diameter and magnets 25mm long), but it is wound with 8 turns of thinner wire. It has a KV rating of 985 – much lower than the hotter 3025/6. It will spin a 12×6” prop at 6,900 rpm on 7 cells and draw only 27A producing 249W.