Fume evacuation is a specialized industrial application, whether you’re talking about heavy industry (think soldering and metal-cutting) or small-scale medical needs (that suction tool at the dentist comes to mind).
Small scale applications include medical applications like laser fume evacuation. For example, in a dermatologist’s office, some of that equipment has a brushless blower in it to remove any skin cells that have been cauterized off, along with the smell of burning flesh. These laser fume evacuations require a high pressure and minimum flow at the tip of the laser to make sure everything is captured.
Moving up to mid-sized applications such as stand-alone soldering stations, fume evacuation takes the form of capturing air as opposed to particulate matter. When it comes to large-scale industrial applications like laser cutting machines, these are large machines that have a large hose evacuating fumes. They need to be extremely strong and reliable to handle long duty cycles.
But no matter what type of fume evacuation device you’re designing, a blower/motor will have to be fitted into the application correctly … the first time.
A Matter of Size and Performance
For each type of blower, there are different performance levels that depend on size, voltage, flow and impedance. Brushed motors typically have higher air performance than brushless motors due to their simple design. They also only work as an open loop system, while brushless motors can be designed as open or closed loop systems for speed control.
Brushed motors are designed to work with a single voltage (e.g. 110V) for the blower, if you require a higher air performance you must increase the voltage. Conversely, many brushless blowers provide consistent performance across a voltage range (e.g. 108-230V) so that you can use the same product worldwide.
Next, take size into consideration. Does your final product need a small blower solution? Maybe you have size constraints on the final result. By knowing the space, you have available, you can make an educated decision about what works best for you. Size and weight may play an important role, especially if you are developing a product that is meant to be portable. You'll want to consider smaller options and different sizes of motors that may have similar performance to what you need.
Main Application Challenges
Most fume evacuation blowers must run 8 to 112 hours per day, so product lifespan is the leading concern for users. Because of this, most fume evacuation blowers are brushless due to their longer motor life.
Another advantage of brushless blowers is that speed control is often required in many applications, such as standalone soldering stations. Brushless blower allow you to select your level of evacuation (low, medium, high) or multiple process step settings. It is sometimes easier to design with a brushless blower with built-in speed control versus a single speed blower that then requires time and knowledge to design separate speed control systems to vary performance levels.
Should You Always Go Brushless?
While brushless blowers are most commonly used in the described fume evacuation applications regardless of motor size or industry, some applications and environments allow the use of more affordable brush motors.
Brushless blowers are the main products selected for these applications due to the need for long lifecycles and the variable speed feature many users prefer or require. However, they are considerably more expensive than brush motors and have a decreased lifetime in hot and/or rugged environments.
Brush motors are often suitable for mid-range industrial fume applications or those in harsh environments. This option is more affordable than selecting a brushless blower. Brush motors can be an option in some applications where the motor isn’t constantly running or it’s not running for extended eight-hour-plus periods of time. Brush motors are also ideal for use in environments where brushless wouldn’t endure due to all their sensitive electronics.
At AMETEK DFS, we manufacture a full line of brushless blowers and longer-life brush motor models such as our Lamb® brushed vacuum motors. These blowers come with a curved Infinity™ carbon brush and are specified to last for 1500 to 3000 hours of operation depending on power level.
When it comes to specifying a blower to fit your fume evacuation application, you want to make sure all your needs are considered. At AMETEK, we provide brushless and brush blowers for all the described fume evacuation applications. You don’t have to do it on your own. We can help you reduce your energy costs and improve application performance over the life of the blower.
At AMETEK Dynamic Fluid Solutions, we understand you’re looking for more than just an off-the-shelf part or one-time solution. You need a true technology partner who understands your engineering challenge that is focused on you, providing customized, collaborative solutions. We’ll also provide you with excellent customer service for a great total experience. Visit www.ametekdfs.com for more information. You can also phone +1 330-673-3452 or email firstname.lastname@example.org.