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The Popularity of Sine Wave Controllers

Nowadays, with the popularity of sine waves, more and more motors have begun to choose to use sine wave controllers for control, and some square wave controllers are replaced by sine wave controllers. The square wave control is simple and easy to implement. It also takes a long time and is relatively mature for traditional industries, but there are limitations in terms of noise requirements, and sine waves just solve this problem. However, for engineers, the choice of square wave and sine wave controllers is quite tangled. With the continuous improvement and maturity of electric vehicle/electric tricycle technology, the needs of end customers are constantly being updated and upgraded. In recent years, During our communication with customers, we also found that customers' demand for "sine wave" controllers ebike sine wave controller is gradually increasing.



Introduction to Sine Wave Ebike Controller

So what is a "sine wave" controller? What is the difference between them and our traditional "square wave" controller, and what are their advantages?


Before we understand the "sine wave" controller, we first need to understand a concept-"sine wave" motor. The "sine wave" generator belongs to a practical new design generator. In view of the fact that the rotor of the existing generator has straight poles, the steel sheet of the rotor has no holes, the two ends of the rotor have no end plates, it is a metal cage structure, there are stator tooth harmonics and stator armature reaction, which causes the air gap magnetic field to distort, then the output The voltage waveform is distorted.


Based on the above considerations, Nanjing Yuen Long Electronic Technology Development Co., Ltd. has launched a full range of "sine wave" controllers based on the specific needs of global customers, including the sine wave ebike controller and the sine wave brushless controller.Controller, electric motorcycle "sine wave" controller, and electric rickshaw "sine wave" controller for the Southeast Asian market (especially Vietnam) and South Asian market (especially India).




Characteristics of Sine Wave Ebike Controller

The advantages of square wave motors have large starting torque and strong load. The "sine wave" of an electric vehicle refers to the controller. The motor of this electric vehicle is alternating current, and the alternating current is a sine wave. 


Therefore, the voltage output by the controller must be a "sine wave". The correction wave or square wave cannot be provided. Motor use.Mute and soft start are affirmative, this is also the biggest advantage of "sine wave". In summary, the comfort is quite good. If you use the "sine wave" and then use the square wave controller, you will feel very uncomfortable.

At the same time, the "sine wave" will increase the torque at low speed due to the relatively high utilization of magnetic field torque at low speeds. Because of this advantage, the "sine wave" will save electricity relatively.



Advantages of Sine Wave Ebike Controller

The driving is silent and no noise, and people get a comfortable enjoyment in driving.

  • In the case of heavy load climbing, the square wave shows the weaker and weaker the climb, while the sine wave can crawl at a constant speed, and the torque is8%-10% larger than the square wave.
  • Large starting torque produces faster starting acceleration.
  • Under normal driving conditions, the sine wave can achieve constant speed movement, and the riding comfort is much better than that of the square wave, while the square wave will consume a lot of current to achieve a constant speed, which shortens the continuous mileage; Under normal driving conditions, it is obvious that the sine wave speed is greater than the square wave speed, and the continued mileage will be relatively long about 5-10 kilometers.
  • The effective field weakening speed increase of sine wave can reach up to 20%, but the torque is not reduced, which ensures the market demand of high speed and large torque, while the torque becomes smaller after the square wave speed increase. For example, when driving at the same speed, a sine wave is stronger than a square wave; under the same torque, a sine wave is faster than a square wave.
  • When the torque is under certain conditions, the sine wave adopts the maximum torque current control, the corresponding input current is reduced, the iron loss of the motor is reduced, and the demagnetization protection effect of the magnet is good, which can realize the high efficiency operation of the motor. The square wave cannot achieve this. Therefore, the sine wave scheme can reduce the iron loss and extend the life of the motor.
  • Because it saves electricity, the battery life will be extended by 25%.



Buyer Guidance

  • Types and characteristics of the e-bike sine wave motor controller

    An e-bike sine wave motor controller is a device that converts a DC current into a sine wave AC and supplies it to the motor. Common e-bike sine wave motor controllers include three-phase sine wave controller, single-phase sine wave controller, servo controller and so on. The characteristics of these controllers are as follows:

    1. Three-phase sine-wave controller
    The three-phase sine wave controller gives three sine waves according to the three-phase coil of the motor, so that the motor gets the sine wave AC supply. The controller is suitable for three-phase coil motors, and can achieve accurate motor control, but the price is high, and it is not suitable for cost-sensitive applications.

    2. Single-phase sine-wave controller
    A single-phase sine wave controller is similar to a three-phase sine wave controller, but it has only one sine wave output port. The controller is suitable for single-phase motors and low power motors, low price and easy to install, but not for high power motors.

    3. Servo controller
    Servo controller is a e-bike sine wave motor controller with high precision, which can monitor the speed and position of the motor and control the motor movement according to the data. It can achieve precise motor control, suitable for applications that require high precision motor control, but the price is high.
  • How to select a e-bike sine wave motor controller

    When selecting e-bike sine wave motor controller, motor type, power, operating environment, control requirements and other factors should be considered. The specific steps are described as follows:

    1. Determine the type of motor: Different types of motors need different controllers, such as the three-phase motor needs a three-phase sine wave controller. About how to choose according to the type of motor and the corresponding sine wave controller, you can contact Yuan Lang, technical engineers will be the first time for you to answer.

    2. Determine the motor power: select the controller according to the motor power. If it is a high power motor, you should choose the three-phase sine wave controller or servo controller.
    Usually, 200w-450w can be used for 200 w, 500w-800w for 500 w, 180 w-1000w for 850w-1 000 w, and 24 tube sine wave controllers for 1000w and above.

    3. Determine the environment of the motor: according to the environmental temperature, humidity and other requirements of the controller, if the application of high temperature requirements need to choose high temperature resistance controller.
    The materials used in the sine wave controller produced by Yuan Lang are all high temperature resistant materials, please rest assured to buy.

    4. Determine the required control accuracy: the servo controller has higher precision, but more expensive; the single-phase sine wave controller is suitable for low precision control.
    High precision sine wave controller and single sine wave controller are produced in our company, now contact us, our engineers will provide you with the optimal solution.

    In short, the selection of e-bike sine wave motor controller needs to consider multiple factors and choose according to the specific application requirements. We have all what you need.
  • E-bike sine wave motor controller functional requirements

    Our conventional products supporting switch (high voltage or low voltage), brake (high level brake or low level brake), reversing, high and low three speed, LED instrument, LCD instrument, electric door lock, anti-theft, etc., the above is the basic functions, accept customization, if you need other functions, please contact us.
  • Sample customization and lead time

    Provide OEM and ODM services, sample customized delivery time less than 5 days, batch product delivery time less than 7 days.
  • Why we chose our factory

    Our company is a powerful Chinese manufacturer with more than 22 years of experience in electric vehicle controller production. The full intelligent production workshop and products can be traced back, with a daily delivery volume of 30,000 sets.
If you would like to have a question then get in touch today, we are ready to assist 24/7.
We welcome your cooperation and we will develop with you.

Factory-direct Connectivity Solutions.
High quality, Competitive Price.
Custom-tailored solutions.
Problem-solving approach.



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     Binjiang Development Zone,
     Jiangning District, Nanjing
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