Marathon Motors
Replacing older motors in air handlers, pumps, and similar applications with highly efficient motors can save energy costs and improve equipment reliability.
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Marathon Motors
High efficiency permanent magnet (PM) motor compatible with appropriate variable-frequency drives (VFD).
Hub Highlights:
- Low noise
- Good efficiency at lower loads
- Compatible with more types of variable-frequency drives (VFD)
Last Edited on: March 31, 2023
| Drive Manufacturer | Schneider |
| Drive Model Number | ATV930 D11M3 |
| Date of Test | May-22 |
| Testing Results: | "System" includes the motor drive and motor itself. Airflow test points were chosen to assist users estimate fan energy savings in HVAC equipment. See picture for full results. Tests accurate within ±0.2% |
| System Efficiency at 100% Airflow | 89.5% |
| System Efficiency at 90% Airflow | 89.8% |
| System Efficiency at 80% Airflow | 89.0% |
| System Efficiency at 65% Airflow | 86.9% |
| System Efficiency at 50% Airflow | 81.2% |
| System Efficiency at 30% Airflow | 62.9% |
| Motor Efficiency at 100% Airflow | 93.2% |
| Motor Efficiency at 90% Airflow | 93.6% |
| Motor Efficiency at 80% Airflow | 93.1% |
| Motor Efficiency at 65% Airflow | 92.4% |
| Motor Efficiency at 50% Airflow | 90.1% |
| Motor Efficiency at 30% Airflow | 84.7% |
Last Edited on: 04/2024
Data Collection
It was easy to schedule the installation; I was very satisfied with the speed of installation; Integrating the EVSE with other onsite systems required a lot of our time and effort; Permitting the storage system required a lot of our time and effort; Provider took care of connecting the storage system to our building systems.
Sample Size
11
Scoring
These scores describe user experience with high efficiency motors in general, not differentiating among specific products. A 5-point rating (1-5) for each subscale was calculated as the mean of responses to all questions in the subscale--all asked with a 5-point response scale [Strongly disagree (1) to Strongly agree (5)]. Negatively framed questions were reverse-scored. Higher scores mean better user experience.
Installation
Finding a qualified installer was easy. I was satisfied with the installer's scheduling of the initial work. Installation was a similar degree of difficulty as typical variable speed [motors/drives]. The instructions for installing were clear and easy to follow. I needed technical support for setup. The instructions for installing and setting up the [motor/drive] were clear and easy to follow.
Performance
The motor operates well; The motor has had performance issues; Occupants/users have made complains about the motor; The motor makes a lot of noise; The motor overheats frequently; The motor does not vibrate a lot.
Maintenance
It is difficult to find a service provider that performs maintenance on the motor; The motor is easy to maintain; Maintenance requires special tools; Maintenance requires special training.
Usability
System Usability Scale (SUS): I found the system unnecessarily complex; I thought the system and service was easy to use; I think that I would need more technical support to be able to use the system and service; I found the various functions in this system and service were wll integrated; I though there was too much inconsistency in the system and service; I would imagine that most people in my role would learn to use this system and service very quickly; I found the system and service very cumbersome or awkward to use; I felt very confident using the system and service.
General Satisfaction
Overall, I am satisfied with the [motor/drive]; If my organization needed another energy storage system, I would select this [motor/drive] again; I would recommend the [motor/drive] to others.