When we talk about efficiency, specifically regarding motors, we’re talking about how much energy it takes the motor to perform its designated task. When a motor is less efficient, energy is wasted in the form of heat. This extra heat in your motor or gear box causes the bearings and lubricants to run hotter. Heat wears down the components, resulting in higher maintenance costs over time. Increased energy consumption also results in increased operating costs.
In this short video, we take a side-by-side comparison of two gearbox/motor set-ups mounted in an aluminum extrusion frame that was designed and built by Rumsey for this demonstration. By placing these motors side-by-side with the same load, you can see just how they stack up next to one another. How are those differences measured and what do they mean over the long term?
Our high efficiency combination is a 2 hp Marathon Symax IPM (Interior Permanent Magnet) motor, paired with a Hub City HERA unit. The HERA is a great drop-in replacement option for many worm boxes, with common center distances and mounting points.
The less efficient combination, is a Marathon 2 hp TEFC motor, paired with a standard Active CubeX worm gear box.
Both combinations were setup with encoder feedback, so they could be accurately positioned, rather than relying on limit switches. The high efficiency combination is being run by a Powerflex 755, and the lower efficiency combinations is run by a Kinetix 5700. This was done purposefully to show platform diversity but doesn’t affect the motor’s performance or results. Both are commanded by a motion capable CompactLogix processor and the trend was monitored with Factory Talk View ME station.
When choosing a motor, there are three main factors to keep in mind: gearing, application and power.
Rumsey stocks all of the products seen in this demonstration as well as several other options. Still not sure what the best fit for your application would be? Contact your Rumsey Automation Specialist for help!