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5 steps to design a solar tracker motor

Jiaming CaiFebruary 2, 2023

Solar Motor Design Experience

  • 1.1 which motor is used in solar trackers?
  • 2.1 How to design solar tracker?
  • 3.1 What are the components for solar tracker?
  • 4.1 5 steps to design a solar tracker motor
    • 4.1.1 Voltage
    • 4.1.2 Power
    • 4.1.3 Working life Requirements
      • DC Brush Motor
      • DC Brushless Motor
    • 4.1.4 Control
    • 4.1.5 Envrionment Test

1.1 Which motor is used in solar trackers?

DC geared motor is the best choice for solar trackers. High-efficiency, low-cost DC brushed motors are dominating the major market in solar system.

2.1 How to design solar tracker?

The first consideration in the design of solar tracking motors is environmental considerations. Heat dissipation and waterproofing in extreme working environments are the focus of motor design. Engineers should also consider the systems life problems caused by corrosion of gears by humidity and highly corrosive salt spray. DONCEN Motor has many design experiences in solar tracking systems. Contact us to get design suggestions for solar tracking motors.

3.1 What are the components for solar tracker?

The solar tracker is an automatic tracking control system. It includes components of solar tracker motors, PLC, PV cells, signal processing unit, sensors, electromagnetic and mechanical and motion control modules.

Active tracking systems can greatly improve the efficiency of solar energy collection.

4.1 5 steps to design a solar tracker motor

4.1.1 Voltage

The first step in designing a solar motor involves determining what voltage the tracking system will provide. Usually the voltage of DC motor is 12V or 24V. Engineers can use lithium battery as energy supply. Please inform our engineers in advance that you use special voltage such as 36V, 48V, 220V. Using the wrong voltage is very dangerous.

4.1.2 Power

The choice of motor power depends on the torque and speed requirements in the solar system. The torque range of solar motors is very wide because of the different angles. Selecting the appropriate motor power requires advice from professional engineers.

4.1.3 Working life Requirements

DC brushe Motor:

Because of the carbon brushes, the working hours of the DC motor are within 3000 hours. The special design can prolong the working life of the motor to a certain extent but it will not exceed 6000 hours.

DC brushless Motor:

In theory, the life of brushless motors will be much longer than that of brushed motors. Limited by the wear of the bearing, generally speaking, the life of the brushless motor is more than 10,000 hours.

4.1.2 Control System

Integral control BLDC motors are also available with Profibus or EtherCAT interfaces or can use Modbus via a gateway. Motor control helps improve the efficiency of the overall solar tracking system. Proper power distribution and overload protection are conducive to the long-term operation of solar trackers.

4.1.2 Environment Test

Solar motors are used in very different environments. Environmental testing is very necessary. Motors must withstand various extreme environments to ensure reliability.

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