20 Factors to Consider When You Buy an Electric Motor - Groschopp

When searching for the best electric motor or gear motor for your application, speed, torque, power and voltage aren’t the only factors to consider. Selecting the right motor requires a detailed understanding of your application’s requirements to ensure efficiency, performance, and longevity. In this guide, we’ll break down 20 essential factors to help you choose the right fractional horsepower motor for your needs.

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1. Voltage:  Will your motor be powered by a wall outlet or batteries? If using an outlet, is it a standard 115V supply or an industrial 230V+ system?
   
2. Frequency:  Motors in the United States typically run at 60Hz, while international applications may require a 50Hz or dual-frequency (50-60Hz) options.
   
3. Speed Requirements:  Does your application need a fixed speed or an adjustable range? If precision control is needed, a motor controller may be required.
   
4. Torque Demands: Starting torque — Does your motor need extra force at startup? Gravity impact — Will it lift or move heavy loads? Variable torque — Does the torque requirement fluctuates throughout operation? Worst-case scenario — What is the max torque needed?
   
5. Power Consumption:  Is the amount of power you think your application needs equal to the power it is actually using? When providing specifications, know if you are using running power or maximum power.
   
6. Duty cycle (Continuous vs. Intermittent Use):  Will your motor run continuously or in short bursts? Intermittent-duty motors generate less heat, allowing for smaller and more cost-effective solutions. Watch our video for more about the importance of duty cycles when selecting a motor.
   
7. Motor Life Expectancy:  Applications running intermittently may get by with DC or Universal motors, while long-running applications that need to operate thousands of hours without maintenance often require AC or Brushless DC motors for longevity and minimal maintenance.
   
8. Enclosure Rating & Environmental Conditions:  Will the motor be exposed to water, dust, or extreme conditions? Does it require stainless steel or food-grade applications? Need corrosion protection? Check out the full IP ratings chart.
   
9. Frame Size & Configuration:  Is space limited in your application? Do you need an inline gearbox or a right-angle configuration for the output shaft position to work with the product’s design? Groschopp offers 5 different gearbox styles to fit your needs.
   
10. Ambient Temperature Considerations:  Extreme heat or cold impacts motor materials and lubrication choices. Selecting oil or grease-lubricated motors depends on operating conditions.
    
11. Altitude: Operating above 5,000 feet? Thinner air affects cooling and motor performance. High-altitude motors may require special adjustments.
    
12. Noise Levels: For hospitals, offices, or public spaces, consider low-noise motors. Gear reconfiguration and material changes can further reduce noise.
    
13. Ventilation & Cooling Systems:  Fan-cooled motors dissipate heat faster but offer less protection against the elements. Non-vented motors provide better ingress protection but take longer to cool down after operation.
    
14. Feedback Device:  Do you need to understand how your motor is operating? Encoders and hall effect sensors collect data from the motor and can be combined with a control to allow motor speed and direction to be regulated.
    
15. Motor Control & Adjustability:   Soft start/stop for handling fragile items? Motor speed and direction changes? Multi-voltage compatibility? Motor controllers enhance efficiency while providing overload protection. Explore Groschopp’s AC and BLDC controls.
    
16. Operating Costs & Energy Efficiency:  Before investing, compare: motor efficiency, maintenance needs, initial vs. long-term costs. Download our free speed torque power and efficiency calculator to help determine motor operating costs.
    
17. Motor Efficiency: Efficiency matters most for motors over 1 HP. Fractional Horsepower motors are often more efficient due to design optimizations.
    
18. Maintenance Requirements:  DC Motors require brush replacements – Can they be accessed easily? Maintenance-free options like Brushless DC motors may be better for long-term reliability.
    
19. Load Variations:  Does your application deal with a range of loads or is the load consistent? Will the changes in load be gradual or sudden? If you are dealing with a range of loads, be sure to provide multiple load points when determining motor specifications.
    
20. Back-drive & Holding Power:   Is it essential for the motor in your application to remain in a locked position if power is cut? Do you need to be able to easily drive a motor without the use of power? For high-mass loads, back-drivability can be beneficial as it allows the load to coast to a stop and protects the gearbox if power is lost. Depending on the application, it might be necessary to add a brake to the motor unit. For more about back-drive, check out our video.

Get Expert Help Choosing the Right Motor

Choosing the right electric motor or gear motor for your application requires careful consideration. If you are unsure which specifications apply to your project, our experts are here to help!

The company is the world’s best electric motor supplier supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

Call us at 800-829-.

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