EMERSON
About the Customer:
Emerson – a very large business manufacturing concern – concentrates on the most complex, profound challenges facing the world in the process, industrial, commercial, and residential markets.
Emerson Automation Solutions plants bought systems for testing Emerson’s new generation “Copeland™ scroll compressors”, and the “new driver generation” used also to run the compressors. The systems are used to develop special high efficiency and high-performance drivers & compressors.
With hundreds of thousands of clients across the world, Emerson delivers the best quality results, ensuring that HVAC solutions are efficient and consistently reliable across all markets.
Customers use “Copeland™ scroll compressors” with modulation technology and building controls to keep buildings comfortable and operating Effie silently. They rely on on-board technology for Copeland scroll compressors to deliver active protection, diagnostic capabilities and improve system reliability.
Challenges and Solutions:
Emerson was looking for an electric compressor testing system that would be used to test the different inverters & compressors designed and manufactured at Emerson plants under dynamic and static conditions. The testing should be done to check the units in dynamic and static ways.
In addition, Emerson required a housing solution for the testing.
About the Product:
Testing the compressor performance can be done in two ways: statically or dynamically.
In both cases, in order to get the data of the compressor output torque, it is necessary to use one of the following two options:
- Testing an open compressor, in a vertical set-up.
- Building a special housing for the compressor stator and rotor, creating a “Housing Motor,” and testing the output performance of the “housing motor.”
Compressor manufacturers and driver manufacturers are both interested in the static and dynamic performances of the compressor.
SYSTEM OVERVIEW
Dynamic Performance
The dynamic performances include the compressor’s torque, speed, voltage, current, and power, during the acceleration of the compressor.
For the dynamic data, MEA uses the “MEA IDS system,” with its unique patented capabilities.
To obtain the real acceleration performance of the compressor, a special loading motor with the appropriate parameters was chosen, allowing the system to simulate test conditions of the compressor on the final applications.
The testing includes:
- Compressor load & time performances during acceleration, including torque, speed, current, voltage, power output, power input, efficiency, reactive power, and power factor.
Static Performance
For the static performances, MEA uses its four-quadrant regenerative load dynamometer system capabilities, that allow loading and rotating the CUT (Compressor Under Test) clockwise and counterclockwise.
Performance Torque Speed
Stall Torque Test Rotor Mechanically Blocked
Torque Ripple at low RPM
Open Circuit Back EMF
Temperature Rise
Inductance LCR test auto 3 phases
Friction vs. Speed
Load from Excel File
Time Torque Curve
Performance vs. time
Back EMF Constant KE (CW/CCW)
Spectrum at Load
Locked Rotor Current time
Deceleration test (MOI calculation)
Photos of the Customer’s system:
