May 31, 2023

A Few Points to Note When Choosing an AC or DC Geared Motor

When designing and manufacturing new products, geared motors can be used to maximize their efficiency and potential. Select AC AC geared motor or DC geared motor according to application requirements (miniature geared motor, vertical geared motor or horizontal geared motor may also be related to your actual application scene), which can ensure that it is your ideal pick.

1. Understand the application requirements.

Knowing the actual needs of your application will help you determine if you need a DC or AC geared motor or a specific class. These needs include:

a. Environment: application and ambient temperature, and protection level (IP)

b. General Requirements: Envelope Size, Side and Overhang Loads, Lubrication Category, Mounting Orientation, and Mounting Category.

c. Input Power: Maximum Current (Amps), Frequency (Hertz), Voltage and Control Category.

d. Geared Motor Performance: Speed, Torque, Duty Cycle, Displacement, Running and Stall Torque.

e. Geared Motor Specifications: Size, Gross Weight, Noise Level, Maintenance Level and Life Expectancy.


2. Select the appropriate geared motor.

a. Take the list of application requirements you gathered and compare it to the specifications of the DC and AC geared motors of interest, such as general purpose, brushless DC geared motors, AC induction motors, and permanent magnet motors. Instead of a pre-engineered geared motor, you will likely find that selecting the gearbox and geared motor separately may be the best fit for your application.

b. Match the performance curve, pull-up torque and yield strength of the gear reducer.

When selecting a geared motor, the correct torque and speed are very important. Take advantage of manufacturer or supplier performance curves for torque, speed and efficiency to find the geared motor that meets your needs. After finding some performance curves, yield strength, and pull-up torque that meet the application needs, check design constraints (such as thermal characteristics) to narrow the selection.

After picking out an AC or DC geared motor, your job won’t be done. Run several tests to ensure that the geared motor is performing well under typical operating conditions and is not overheating, overvoltage, or noisy.