Overvolting the electric bike motor is one of the topics that are frequently asked about, and the reason for this is, of course, the desire to get a faster speed from the electric bike motor.
Although overvolting may be a good idea to increase the speed of an electric bike, there are a few things to keep in mind.
In this post, we will discuss the topic of overvolting and what are the important points that you should look at when doing overvolting.
What is Overvolting An ebike Motor?
As a general rule, all-electric bike motors can operate at different volt levels without a problem, but there are ebike motors rated to work on a specific volt, and this does not mean that you cannot increase the voltage, but it means that the safest performance for this motor is, for example, 36 volts or 24 volts and so on.
Overvolt is to increase the voltage entering the motor in order to increase the motor RPM and obtain a higher speed for the ebike.
How to overvolt your ebike motor?
As a general rule, it is possible to make an electric bike motor overvoltage by increasing the battery voltage using a higher battery and also making an upgrade for the controller.
How to calculate the expected speed After overvolting your Ebike Motor?
One of the good things that you should do before making an overvolting is to calculate what is the expected speed after overvolting.
Based on this calculation, you will know whether this is the speed that you need or that you do not need it.
There is a wonderful equation that you can calculate the overvoltage with, which is to calculate the actual maximum speed of the motor of your bike and then calculate the percentage increase in this speed:
Determining the actual current speed of the motor:
RPM * wheel size * .003 = actual top speed.
To determine the speed after the overvolting :
The actual maximum speed * number of new motor voltage /rating voltage of the motor = the actual speed after overvoltage
Note: you can change .003 to .0048 in case you want to calculate the speed in KM
Suppose you have a motor rated at 24 volts, the RPM is 201 and the wheel size of your bike is 26 inches
In this case, your maximum mileage speed will be: 24 * 26 * .003 = 10.1 miles
Now, let’s say you want to make a power output of 48 volts
In this case
10.1 * 48 / 24 = 20.2 miles
What you should consider when overvolting your ebike Motor?
As a general rule, there are 4 main points that you should consider when doing overvoltage
When you overvolt the motor, the electric current will be greater, which will cause the motor to overheat and may lead to motor damage and replacement.
In order to overcome this problem, you can reduce the ampere output from the motor so that the amount of electric current remains appropriate
One of the problems that you may encounter when overvolting the motor is overheating in the controller, and the reason for this increase is also the high voltage. In order to solve this problem, it is possible to upgrade the controller.
How to Solve ebike Controller Overheating? (Explained)
3- Your safety.
When you overvoltage the electric bike motor, you increase the speed of the bike by 40%, and this is a significant increase, especially since the electric bike is not designed to reach high speeds.
This may negatively affect your safety while riding a bike
That is why it is better to take all the necessary precautions while riding a bike.
4- Your riding Style.
If you ride your bike on a daily basis and on hills or off-road or you are an overweight rider, this will put a greater load on the motor and it may not be a good idea to make overvoltage because of the possibility of damage to the motor and controller will be high
Overvolting may be a good idea in the event that you have a strong need to increase the speed of your bike and also you have done it appropriately with the capabilities of the motor of your electric bike.
You should take into account that the motor will heat up significantly, which should be monitored periodically.
If you notice excessive heat in the control panel, it is best to upgrade it to a model that supports higher voltages.
If you ride your bike on a lot of hills or you are overweight, it is best to consider upgrading the motor to a larger one that suits your needs.