Need To Know About Electric Bike Speed Controller
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Need To Know About Electric Bike Speed Controller

Views: 204     Author: Site Editor     Publish Time: 2023-03-01      Origin: Site

Need To Know About Electric Bike Speed Controller

One of the most important features on an electric bike is the controller. It basically acts as the brain of the e-bike and helps you to manage every aspect of the bike. By connecting all the electrical components on the e-bike, including the battery, motor, and throttle; the controller allows you to control the power from the motor, speed of the bicycle, acceleration, etc.

Below is everything you need to know about electric bike controllers including how to install it.

1. What Is An E-bike Controller?

An electric bike controller is a crucial component that connects all the electrical parts on the bike in one place. These include things like the motor, battery, throttle, pedal-assist, display, and various sensors. Essentially, the controller is a small computer that acts as the heart of the electric bike and through it, you can manage the overall functioning of the bike.

As a rule, controllers come in a sealed protective box because they are exposed to the elements. However, some designs can be mounted inside the bike’s frame and hidden away from sight.

When choosing a controller for your electric bike, it is crucial that you find one that is compatible with other bike parts such as the motor, display, battery, etc. The following factors ought to be considered.

2. How To Choose The Right Controller

If you want to use a controller with your electric bike, you need to take several factors into account.

To match the voltage

The first thing is to ensure that the controller can handle the voltage and current requirements. That means you need to check whether the controller voltage and power are the same as those of the motor when selecting because overheating is a likely consequence of running too much voltage through a controller.

With the correct voltage and power, you’ll reduce the heat generated by the controller and increase the stability and reliability of its operation.

To match the power rating

Motors will not be able to reach its maximum speed as its claimed if an unmatched controller controls it.

Running an unmatched controller either higher or lower volts than the motor and battery will not only affect the motor’s performance but also increase the risk of overheating and connectors burning out.

The motor controller you select should be compatible with the motor’s power rating and the battery voltage you are using.

To match the type of the motor

You should also consider the controller type to match the current motor type used on your e-bike.

  • Brushless e-bike controller

You will need to choose the brushless motor controller if your ebike is built with a brushless motor.

Below is our Merrygo Ebike with brushless ebike controller:

MG03 ebike controller

  • Sensored controller

Some controllers require hall sensors, while others can run without them. Hall sensors on the motor detect its rotation, and the controller produces power according to the sensor signals. So you should choose the controller mode with hall sensor if your E-bike motor is sensor enabled.

Using a brushless motor controller that supports a sensorless operation is necessary if you’ve got a sensorless motor.

  • Sine wave controller

Among the most popular types of controllers is the sine wave controller, which is well known for its low noise output.

It helps your bike in better performance when climbing hills or carrying loads. On the other hand, the sine wave controllers will use much more power and, therefore, will cost you very much more. Furthermore, they are limited to matched motors

You also need to know that a sine wave controller can provide smoother acceleration with switched reluctance motors.

  • Square wave controller

The square wave is another type of controller that differs in the phase voltage waveform of the sine wave controller. It generates a rectangular waveform.

In comparison to sine wave controllers, square wave controllers are less expensive and are more robust during sudden braking or acceleration. They can also work with different motor types

However, there are some disadvantages of square wave controllers: they usually generate high noise and cannot produce even or smooth control, also, square wave controllers have difficulty increasing motor efficiency when going uphill or carrying a heavy load.

If a speed controller is available, that will plug and play directly into an electric bike. However, when installing it, be careful because the connectors may be the same. However, the wiring patterns going to the connectors may differ from that of the original controller.

3. How To Connect The Electric Bike Controller?

The wire types and wire terminal(connector) of the e-bike controller could be different in the different controller design. You need the electric bike controller wiring diagram to ensure the right wiring connections.

Most e-bike controller will have these wires motor, battery, brakes, throttle/ accelerator or PAS Pedal Assist System (some controllers have both types of wires, some have one of them).

Some more wires are found in the advanced controllers, such as Display or speedometer, Three speeds, Reverse, LED light, etc.

Here is one KT controller wiring diagram.

elecric bike controller

4. Conclusion

The controller is the brain of your ebike connecting to the display, battery, throttle, and pedal assistance. It receives the signals from them then sends the feedback to make the eBike go correctly.

The life time of a good controller should last anywhere from 4 to 5 years. Choose the best quality eBike controller for your electric bike