Different motor parameter adaptations

Introduction

The MD series ESC solution adopts FOC control technology and supports multiple types of (sensorless/Hall/servo) DC brushless motors . Users can adapt parameters based on the matching host computer according to the actual application scenario to achieve the best control effect. This article introduces the differences in parameter adaptation of various motors .

The MD series ESC solution is equipped with a dedicated parameter configuration host computer. Users can configure parameters according to the selected motor and application characteristics. When configuring parameters, different types of brushless motors have different configuration and debugging parameters.

Sensorless brushless motor

The control process of the brushless motor is generally to drag the motor to a certain speed through an open loop, and then switch to closed loop motion. The closed loop control is completed by measuring the electrical angle and speed through the back electromotive force generated during the motor movement, so the parameters of the brushless motor configuration include the motor parameters and startup parameters. First, let's look at the electrical parameters of the motor itself. The parameters are shown in the figure below, which are the number of pole pairs, phase resistance , maximum and minimum phase inductance, and back electromotive force constant. The operation is as follows;

first step:

Build the hardware environment (MD202/MD102 ESC), open MD Tool.exe on the host computer, click Connect to open the device, and then click the Parameter Update page, as shown below:

Figure 1

Step 2:

Configure and fill in the motor's own parameters, as shown in the figure below. The following parameters can be obtained from the motor manual or measured manually.

Figure 2

Step 3:

Configure the startup parameters. As shown in the figure below, hover the mouse cursor over the parameter name and a detailed description of the parameter will pop up. Fill in the parameters according to the prompts.

Figure 3

Figure 4

Step 4:

After modifying the parameters, click Write Parameters, then power on the ESC again, and then set a target speed in the following window. If the motor starts normally, the parameter configuration is successful.

Figure 5

Hall Effect Motor

The brushless Hall sensor motor needs to be configured with the pole pair number and Hall resolution, after which the motor can be driven normally through self-learning.

first step:

Build the hardware (MD201/MD101 ESC), open MD Tool.exe on the host computer, connect and open the device, as shown below:

Figure 6

Step 2:

Configure the motor's own parameters and fill in the parameters as shown below:

Figure 7

Step 3:

After modifying the parameters, click Write Parameters, then power on the ESC again, and then set a target speed in the following window. If the motor starts normally, the parameter configuration is successful.

Figure 8

Servo brushless motor

The servo brushless motor needs to be configured with the number of pole pairs and encoder resolution, after which the motor can be driven normally, as shown below:

first step:

Build the hardware (MD200/MD100 ESC), open MD Tool V.exe on the host computer, and connect and open the device, as shown below:

Fig. 9

Step 2:

Configure the motor's own parameters and fill in the parameters as shown below:

Fig.10

Step 3:

After modifying the parameters, click Write Parameters, then power on the ESC again, and then set a target speed in the following window. If the motor starts normally, the parameter configuration is successful.

Fig.11

The MD series ESC selection table is as follows:

Fig.12