How Does A Gear Motor Works

Defined as a type of electrical motor, a gear motor uses an external force in the form of magnetism to move the blade attached to the shaft. This external force is then transformed to electricity for the motor to perform its function. Afterwards, the energy is consumed by the gear motor to rotate a series of gears in a unified gear train.

Basic Operation Principles

There are numerous types of gear motors, but the most common are the alternating current (AC) and direct current (DC). Generally, gear motors have a speed rate of 1200 to 3600 RPMs. This speed can be classified into categories: the normal and stall-speed torque.

As the gear motor use magnetic current, the gears in the gearbox or gear reduction equipment are turned. Here, a secondary shaft is attached to the gears, resulting to the increase of torque that the motor produces as its output speed is reduced simultaneously. When this happens, the gear motor will not pull out much current to operate and will function more slowly, but will give more torque.

Tips on Working with Gear Motors

  • When choosing, you should first find out the required torque at the output shaft of the gearbox. Here, the two significant factors are the output shaft’s speed and capabilities. When sizing a gear motor for a certain application, you should focus on the available torque and speed at the output shaft of the gearbox.
  • For applications with high RPM requirements, you should opt for a hydraulic gear motor. Commonly used in simple rotating mechanisms, this motor type requires only low initial cost. Same goes with a surplus gear motor – you get to spend less, without sacrificing the motor’s quality.
  • For more energy efficiency, consider the motor type and efficiency of the gear thoroughly. In some instances, the gear motor’s efficiency can be improved by swapping its split capacitor with a stationary magnet DC motor. Split capacitors may have greater efficiency potential, but their efficiency tends to become lower during operation. A right angle gear motor may be a perfect solution to small spaces, but unfortunately, it only has 50% efficiency rating or less. If you are looking for a more efficient gear, then you should go for helical gears as they have a high efficiency rating of 98%.

  • Do not oversize or undersize a gear motor. Over sizing can cause efficiency issues to the motor, while under sizing, on the other hand, can result to early motor failure.
  • Do not shortcut the math. This means that when selecting the right gear motor, you have to carefully go between the details. Consider service factor, dynamics, weight, speed, and friction coefficient. The fastest way to accomplish this is by using the software provided by the manufacturer.

If you require power tools that have high torque at a relatively lower RPM, then gear motors are the right solution. These tools require efficiency without compromising the quality of the equipment thus making these gear motors a popular choice for medical tables, robotics and lifts among others.