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QuickSilver Controls, Inc.

712 Arrow Grand Circle, Covina, CA 91722888-660-3801 626-384-4760 Fax: 626-384-4761

www.QuickSilverControls.com

ATEX Thermal Testing Report -- October 24, 2011Testing was performed October 18, 2011 at Consolidated Laboratories, Covina, CA.

Setup starting 8:00AM October 18, 2011. The QCI-N3-E3 controller had previously beendownloaded with Rev 54-05 code (M0554.hex), as is used on production ASTS units, and wasinitialized using a 30 cable (Factory Default Initialization 16 52v 8500 torque.qcp), running froma 48v power supply. A second motor was configured to act as a variable speed load to allowoperating of the test motor at maximum load at each speed. Both motors were connected to acommon brake unit between the controllers and the power supply.

The Test System was configured on bench top and allowed to come to equilibrium with the lab

temperature for 45 minutes while thermocouples are attached. Thermocouples attached to frontbearing housing, middle of stator, back bearing housing and back cover of electronics housing(see picture below). Thermocouple reported temperatures agree within 0.8F at start of test.

Nominal room temperature at start of test was 74.5F (average of thermocouples). The chartrecorders started at 9:00 and allowed to record baseline before energizing the motors.

Previous testing had indicated that the highest heating in this application occurred at the highestspeed range in this application: 2000 RPM. To verify the previous testing, this test was startedat 2000 RPM, with subsequent settings reduced in steps of 500 RPM within the day to verifythat each of those speeds produced less heating.

About 9:15 AM, the unit under test, QCI-A34HC-1 with a QCI-N3-E3 controller, was energizedand commanded to 3000 RPM, while the load motor (generator) was commanded to -2000RPM. (The negative direction of the load motor causes the unit under test to be rotated in theclockwise direction as the load motor and test motor are facing each other. The load motorspeed of 2000 RPM causes the driving motor to attain 2000 RPM). Reported torque from unitunder test was 8500 counts, as seen from the Register Watch Panel. Speed as measured bythe unit under test controller velocity register (read via the Register Watch Panel) wasapproximately 533100 counts per second, at 16000 counts per revolution, this corresponds to33.32 Revolutions per second or ~1999 RPM. Speed was measured with an optical tachometerto 2000+/-1 RPM. Power supply voltage measured at 48.2v at the power supply.

Test Unit was allowed to come to Equilibrium (approximately 1.5 hours) (10:45)

Temperatures at all 4 thermocouples noted and recorded. The ambient temperature wasmeasured at 74F.

The speed was dropped to 1500 RPM to verify that 2000 RPM was indeed the highesttemperature operation over the used speed range. The speed was measured as1500 +/-2 RPMusing an optical tachometer. Unit was again allowed to approach equilibrium.Measurement taken at 11:50 and logged to test sheet. Ambient temperature was measured at77F.

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The speed changed to 1000 RPM. The speed was verified to 1000 +/-1 RPM using the opticaltachometer. The Test Unit was again allowed to reach temperature equilibrium. Temperature at4 thermocouples logged to report at 1:08PM, Ambient temperature measured at 80F.

The speed was changed to 500 RPM. The speed was verified to 500+/-1 using the opticaltachometer. The Test Unit was again allowed to reach temperature equilibrium. Temperature at

4 thermocouples logged to report (1:54 PM). Ambient temperature measured at 82F.

The speed was changed to 0 RPM with torque applied to simulate locked shaft. The shaft wasverified as stationary. The Test Unit was allowed to reach temperature equilibrium. Thetemperature of the 4 thermocouples was logged to report (3:12 PM ) Ambient temperature wasmeasured at 83F.

The units were turned off and the test was ended.

The charts in the Consolidated Laboratories test report show that the highest temperature didcorrespond to the maximum speed of 2000 RPM. The highest external temperature measuredwas the center of the laminates, and was 207.5F (97.5C) in an ambient of 74F (23.3C).

The following pictures show the test bench set-up as well as the location of thermocouples.Note: the fan seen in the background was not plugged in and was not operating in the course ofthe test.

Sincerely,

Donald P. Labriola P.E.President,QuickSilver Controls, Inc.626-384-4760

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Test bench setup (Note: fan in

background was not powered.)TC4

TC3

TC2

TC1

Unit Under Test

Load MotorTC1

Thermal Chart recorders

N3 DriversUnit under test

30 Cable

TC2TC3 TC4

TC1 & TC2 TC3 & TC4 (channel 1 and 2)