What are Brushed Vacuum Motors?

Learn more about brushed vacuum motors with this helpful infographic. The Brushed Vacuum Motors infographic covers:

• Brushed vacuum motor basics
• Moisture protection
• Speed
• Bypass vs thru-flow motors
• Determining the ideal design for brushed vacuum motors

Click the infographic image to see a larger view.

 

Brushed vacuum motors are based on a universal motor design, which uses a wound rotor and stator in series with one another. Universal motors are most found in smaller, corded appliances, and have high speed and good starting capability. The workhorse of many applications, these motors have a high horsepower-per-pound ratio and are generally less expensive than their brushless counterparts.

Moisture Protection
Our Lamb® brushed motors use a revolutionary air seal technology where a fan creates a localized pressure to push moisture-laden air away from the bearings. In addition, a PTFE washer goes up against the shaft and right below the bearings on their pressure side to create a physical sliding seal.

Bypass vs Thru-Flow
In bypass motors, the working air is independent from the cooling air with a separate fan used to direct cooling air over the armature and field. In thru-flow motors, the working air travels through the fan system and is discharged directly over the motor windings as it exits.

Speed
Their design has become more economical and material-savvy, which has allowed the standard speed to increase to between 30,000 and 40,000 RPM. Some designs even exceed 50,000 RPM.
 
Determining the Ideal Design for Brushed Vacuum Motor
Since there are a variety of brushed vacuum motors available, there are certain questions you should ask to determine the ideal design 
for your application. Some of these questions include:
 
• What type of air will be picked up?
• What are the cooling requirements?
• What will be the operating point?
• What type of voltage?
• What is the use case?
• What other features do you need

To learn more about Universal Motors, read our white paper Not Your Grandfather’s Universal Motors. . . Anymore.

For more detailed information contact us. We're here to help you find the ideal brushed vacuum motor for your needs!