The operating conditions and durations are shown in Table 01.
|
Operating Condition
|
Fan Speed
|
Time Duration
|
Units
|
|---|---|---|---|
| Highest-speed operation | approx. 1500 rpm | 07:04:11:23 | DD:HH:MM:SS |
| Mid-speed operation | approx. 1300 rpm | 01:00:50:00 | DD:HH:MM:SS |
| Low-speed operation | approx. 1100 rpm | 01:00:45:52 | DD:HH:MM:SS |
A 4-channel, temperature-logging device was utilized to capture readings from four locations, two within the VIX2 enclosure positioned on the motor windings, while the other two were externally located: one on the "anticipated", hottest part of the VIX2 enclosure, and the other measuring ambient air temperature.
The test-run environment was conducted within a free-standing, wooden-construction, lab-space building, readily subject to changing outside-environmental conditions. During the test period, the majority of the total time was without lab-space ventilation to the outside. The purpose of "no ventilation" was to allow the lab-space ambient temperature to "gently" rise and fall in response to lab-space internal heat load coupled with the effects of outside environmental conditions.
The effect of a "hot spell" in San Diego during the latter part of the testing period (approximately, from Wednesday, September 30, 2020 thru Saturday, October 3, 2020) raised the lab-space to comparatively high ambient temperatures, as much as 100-degrees-Fahrenheit, for extended periods of time.
Summary temperature data is shown in Table 02:
|
1: Motor Core
|
2: Motor Winding Surface
|
3: External Housing
|
4: External Ambient
|
|
|---|---|---|---|---|
| high speed - maximum | 211.9 | 203.5 | 114.6 | 100.2 |
| high speed - average | 193.8 | 178.7 | 98.2 | 81.5 |
| medium speed - maximum | 206.8 | 198.4 | 110.1 | 97.5 |
| medium speed - average | 183.7 | 173.6 | 98.6 | 85.2 |
| low speed - maximum | 187.6 | 177.3 | 108 | 96.1 |
| low speed - average | 176.6 | 165.6 | 96.2 | 83.6 |