Blog Tag: constant speed motors

A very large number of appliances and motorized equipment that we use utilize electric motors. Some are very tiny and they run small appliances and consumer products like 3D Printers and grinders. Most of these are induction type motors that may have some form of speed controller or are just on/off motors. And, many of them are designed for single voltage use, meaning they are either 120 volt 60 Hz or 240 volt 50 Hz ( like those in Europe ). 

In 1998 General Electric developed a new motor that incorporated a magnetic drive system as opposed to a copper wound motor. These new motors could run forwards or backwards and would operate on 120/240 Volt 50/60 Hz current. First, this allowed them to be used any country in the world and secondly opened the door for development of a wide variety of new devices for many equipment manufacturers. 

In addition to being able to run in both directions, they could be controlled to run at increments of 1% to 100% in 1% increments making them extremely viable for applications where finite speed control was required. In addition, these motors can now be programmed to speed up or slow down based upon the performance requirements of the equipment. For example, if the motors are being used on systems that require different speed profiles for various performance requirements. These new motors can now also be operated by using a App on your phone so they can be controlled from any distance as long as there is wifi available. 

Pure Air Systems, an Indiana based corporation, has been using these new motors in their HEPA based, fan powered air filtration systems since 1999. PAS was one of the first companies to incorporate these motors into their systems replacing the standard induction motors. The new motors provided an entry into the European market and created an entirely new market for these air filtration systems. They could now be used both attached to existing HVAC systems with the ability to match the airflow requirements and also as stand-alone units where air filtration was needed in non-conditioned space.

For more information on our product line please go to our website at: http://www.pureairsystems.com   

When it comes to heating or cooling the interior of their homes, most homeowners assume most heating/cooling systems are more than adequate to achieve comfortable room temperatures; be it summer or winter. Nothing could be further from the truth.

Most homes in the US use split system, forced air, ducted heating/cooling unit that consists of a compressor unit ( located outside) that is used for cooling the house but may also be a heat pump version that can provide cool or hot air. The other part of the system is the air handler (fan powered unit) normally located inside the home in the basement, attic, garage or crawl space.

HVAC systems are rated by using a SEER standard (most now minimum 12 SEER) with units now having efficiency ratings up to 21 SEER. And, many of the newer heating/cooling systems incorporate the variable speed, computer controlled digital motors for air flow. These newer units are not only much more energy efficient but can also significantly aid in air filtration and the removal of indoor airborne contaminants.

The new variable speed fan systems in the air handlers allow for the fan motor to run continuously using very little electricity. When the system calls for heat or cooling the fan motor ramps up to meet the air flow requirements and runs at that speed until the heating or cooling demand is met. Once the thermostat is satisfied the house is at the desired temperature the fan slows down to a very low running speed (around 30% of high speed).

Beyond the fact that using a constant running fan keeps the air temperature more even throughout the house, the constant movement of air also keeps the particulate in the house airborne and allows them to be continuously pulled back to the air handler ( and air filter) through the return air ducts.

This is important because unless the air in the home is constantly being moved and pulled through the HVAC duct system, the dust, dirt, dust mites, mold and bacteria will stay on the floors and other surfaces and unless they are disturbed and put back into the air, they will not be captured by the air filters in the air handler.

Pure Air Systems has been using the variable speed digitally controlled motors in their Hepa Shield systems since 1999. And, is the only HEPA filtration system manufacturer in North America that uses this technology. When coupling the HS series HEPA units to a variable speed heating/cooling system you have the best of both worlds. A commercial grade HEPA system that runs in conjunction with the variable speed HVAC unit, ramping up and ramping down and providing constant air filtration with minimal energy costs.

For more information on the variable speed heating/cooling systems and the line of variable speed HEPA systems go to our website at: www.pureairsystems.com