Spoiler alert: There are efficient variable speed drive (VSD) machines available that can operate reliably in dusty environments, making them the best air compressor overall.
When working with applications like wood and metalworking, there’s bound to be dust in the air and equipment rooms. Such particles can affect the performance of machines found throughout an industrial facility, including air compressors. To minimize the impact of dust, it may seem logical to use a fixed speed machine. This is because fixed speed equipment doesn’t have an inverter, and therefore less electronic components than a VSD compressor.
Adding to this, many VSDs have an IP20-rated inverter, which isn’t enough to protect it from particles. That said, Atlas Copco’s VSD compressors with come with an IP54-rated inverter designed to prevent dust from affecting its operation. In addition, these machines come with IP66 protection for the drivetrain. When combined with the energy efficient benefits VSDs provide, they typically outperform fixed speed equipment. Read on to learn about why this is the case for most industrial applications.
Fact: A protected inverter is safe from dust
Regardless of whether you’re using a fixed speed or VSD machine, you’ll need to deal with dust from the ambient environment. This is mainly handled with inlet filters. These ensure contaminants are removed from the air before it enters a compressor. In addition, electrical components, like an inverter, need to be properly protected from dust. This is where IP ratings are important.
As mentioned above, fixed speed compressors don’t have an inverter, which makes them seem like the logical choice when working in dusty conditions. However, Atlas Copco’s VSD compressors are designed with a completely sealed, IP54-rated inverter. This prevents dust from entering. As a result, these VSD machines are a better choice because are both energy efficient and reliable.
Alternate approaches to preventing dust include having a cabinet around the inverter. This needs to be opened each time the machine is checked. Regardless of which protection method is used, it’s recommended to install an air compressor in its own room. In addition, this space should be as dust and dirt free as possible.
Fact: Dust impacts compressor efficiency
The reason inverters are so important is that they are what allows a VSD compressor to change speeds to meet demand. By contrast, fixed speed machines run at the same full speed regardless of demand. This is why VSD compressors tend to consume less energy than fixed speed equipment as they use less electricity when demand is low.
Although an IP54 rating protects the inverter (and the compressor), the importance of inlet filters cannot be stressed enough. As pointed out earlier, they’re what keeps the air entering a compressor clean. Regardless of whether you’re using a fixed speed or VSD machine, the right filters should be installed. In addition, proper cleaning and maintenance should be regularly carried out.
If not handled correctly, both types of compressors run the risk of cooling and pressure issues from dust. Essentially, cooling elements can become blocked, making a compressor work harder. This consumes electricity and negatively impacts performance. When running optimally, VSD equipment is up to 60% more efficient than fixed speed compressors. It’s important this is maintained so as not to impact their operational cost benefit.
Choosing the best air compressor
To reiterate, there are Atlas Copco VSD compressors available with an IP54-protected inverter and IP66-rated drive train. This includes Atlas Copco’s third-generation VSD, the GA VSDS. There’s even an outdoor model for maximum durability, which features a canopy designed and built for use on mining sites and in coastal areas.
Regardless of what you choose, we understand any industrial compressor is a big investment. This is why our team is here to help you find the best air compressor for your needs. While it’s true VSD machines cost more upfront than fixed speed equipment, they usually offer quick return on investment. When factoring in that up to 80% of an air compressor’s ownership costs is electricity expenses, it’s clear to see why efficiency matters.
We’ll help walk you through sizing, air compressor placement and setup, and ideal operating conditions. With this, if you have any additional questions about why a VSD is the best air compressor for dusty industrial applications, please reach out. Our knowledgeable country experts are available to support you.
