EM-TEST – Endurance Motor Testing Software

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Product Description

Magtrol’s EM-TEST is an Endurance Motor Testing Software for PC (Windows 7 SP1 / 10) based data acquisition. Combined with a Magtrol DSP 7000 Series High Speed Programmable Controller, EM-TEST works with any Magtrol dynamometer or in-line torque transducer to determine the performance characteristics of a motor under test. Up to 128 parameters are calculated and displayed utilizing EM-TEST’s unique testing and graphing capabilities.

An integral component of any Magtrol Endurance Motor Test System, EM-TEST performs curve testing in a manner best suited to the overall efficiency of the test rig. Written in LabVIEW™, EM-TEST has the flexibility to test a variety of motors in a multitude of configurations. The data generated from this user-friendly program can be stored, displayed and printed in tabular or graphical formats, and is easily imported into a spreadsheet.

Magtrol can also make custom modifications to the software to meet additional motor testing requirements.

Analog Input Measurement

Up to 128 Analog Sensors can be read and monitored during a motor test. Heat rise curves on the bearings, windings and housing of a motor can be performed and air flow/exhaust efficiencies can be measured with an air tool or internal combustion engine.

EM-TEST, with its complete dynamometer control, even allows for analog measurement while performing load simulation for duty cycle and life testing.

CAUTION: Specific hardware (e.g. NI™ 9211,…) is required to enable this function.

Temperature Sensor Measurement

Up to 128 thermocouples can be read and monitored during a motor test. Heat rise curves on the bearings, windings and housing of a motor can be performed. EM-TEST, with its complete dynamometer control, allows for sensor measurement while performing load simulation for duty cycle and life testing.

Hysteresis function: If the temperature exceeds the high threshold, the test passes to PAUSE mode and a relay is disabled. When the temperature passes under the low threshold, the test passes to RUN mode and a relay is enabled.

CAUTION: Specific hardware (e.g. NI™ 9211,…) is required to enable this function.

Relay Control

Up to 12 relays can be controlled during test. The state of each relay can be set for each step.

CAUTION: Specific hardware (e.g. NI™ 9482,…) is required to enable this function.

Features

Specific Features

  • Graphical User Interface: User friendly tabbed pages for quick navigation.
  • Global Project: Management Data and Setup of current project.
  • Lock / Unlock function: Front Panel lock function prevents modification by an unauthorized operator.
  • Set-point table: The set-point curve is defined in the data table. Sampling rate, voltage and Analog Output, Digital Ouput and Relay state are also defined in this table.
  • Endurance Testing: Tests speed, torque, amps, watts input, watts output and open loop parameters. Capable of adjusting sampling rate by step and using step or ramp from one load point to the next.
  • DSP7000 / 6001 High Speed Programmable Controller Support.
  • Micro Dyne Motor Testing System Support
  • Supports the optional Analog and Digital I/O Modules on the DSP7000 Programmable Controller.
  • Expanded power analyzer and power supply selections.
  • Optional Analog and Digital I/O provides more device flexibility.
  • Temperature Security: Over-Temperature control and Hysteresis Temperature function.
  • Three-Phase Power Meter Data Acquisition: Obtain data on each individual phase and/or the sum used in the chosen parameters (amps, volts, input watts and power factor).
  • Spanning file function: Auto-Incrementation of filename depending on cycle, hours, days or file size.
  • Graph and display during test: Displays previous files during test in tabular or graphic view.
  • Recovery Function: Recovers test if the computer crashes (Windows® problem, power off).

Standard Features

  • USB2.0: Computer interface for DSP7000 Series
  • IEEE-488: Computer interface with National Instruments™ PCIe-GPIB or USB-GPIB.
  • Multiple Language Support: Switch to/from English, French, German at any point during the program. Additional language dictionaries can be created/edited by the user.
  • Automatic Load Defaults Option: Downloads testing instrument parameters based on model number.
  • PID Adjustment Routines: Helps adjust the system for step functions.
  • Rapid Graph Plotting: Change both the X- and Y-axis to display additional test curves, without having to exit the graph.
  • Displays 128 Tested and Calculated Parameters: Torque, speed and auxiliary input are displayed from the DSP7000 Series/6001 Dynamometer Controller; amps, volts and watts from an (optional) power analyzer (e.g. MODEL 7510). Calculated values including horsepower, efficiency, power factor, output watts and time can also be displayed. Optional analog and digital inputs can also be displayed.
  • Curve Fitting: A curve fitting routine can be applied to most motor test curves. Raw data and curve fit data can also be displayed simultaneously.
  • Context Help: Hover over any field or parameter with the mouse to display a context help box.

Applications

EM-TEST is designed for long-term motor test cycling. It is ideal for developmental applications. It has the ability to duplicate tests and run them automatically. This versatile program is extremely valuable to anyone involved in motor testing. EM-TEST can be used as stand alone software or in combination with M-TEST 7 Motor Testing Software.

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                    [post_content] => The Model 5241 is a voltage-controlled power amplifier designed exclusively for Magtrol's Model HD-825 Hysteresis Dynamometer. Because of its double braking system, the HD-825 requires more than 4 amps of power in order to reach full torque. The 5241 (which can provide up to 5 amps of output current) is necessary in order to amplify the power between a 6200 or DSP7000 Controller (which both have a maximum current output of 1 amp) and the HD-825 Dynamometer.
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                    [post_content] => Hysteresis Brake Dynamometers (HD Series) are versatile and ideal for testing in the low to medium power range (maximum 14 kW intermittent duty).  With a Hysteresis Braking system, the Dynamometers do not require speed to create torque, and therefore can provide a full motor ramp from free-run to locked rotor.  Brake cooling is provided by convection (no external source), by compressed air or by dedicated blower, depending on the model.  All Magtrol Hysteresis Dynamometers have accuracy ratings of ± 0.25% full scale — depending on size and system configuration.

Features


    
 	
  • 16 Standard Models with Maximum Torque from 2.5 oz·in to 500 lb·in (18 mN·m to 56.5 N·m)
    • 
 	
  • Hysteresis Braking System: Provides precise torque loading independent of shaft speed
    • 
 	
  • Motor Testing from No Load to Locked Rotor
    • 
 	
  • Accuracy: ±0.25% (Full Scale)
    • 
 	
  • Air Flow Sensor: For protection against overheating and operator error
    • 
 	
  • Standard Torque Units: English, Metric and SI
    • 
 	
  • Custom Dynamometers: for special torque and speed requirements
    • 
 	
  • Easy Calibration
    • 



The Hysteresis Braking System

All Magtrol Hysteresis Dynamometers absorb power with a unique Hysteresis Braking System which provides frictionless torque loading independent of shaft speed. The Hysteresis Brake provides torque by the use of two basic components - a reticulated pole structure and a specialty steel rotor/shaft assembly - fitted together but not in physical contact. Until the pole structure is energized, the drag cup can spin freely on its shaft bearings. When a magnetizing force from the field coil is applied to the pole structure, the air gap becomes a flux field and the rotor is magnetically restrained, providing a braking action between the pole structure and rotor.


 

 

 

 

 




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                    [post_content] => The Powder Brake Dynamometer (PB Series) contains, as its name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through friction. They are ideal for applications operating in the low to middle speed range or when operating in the middle to high torque range. Like Hysteresis Brakes, Powder Brakes provide full torque at zero speed. Like the Eddy-Current Brake Dynamometers, the PB series are water-cooled, allowing for power ratings up to 48 kW. The PB Dynamometers have accuracy ratings of ± 0.3% to 0.5% full scale, depending on size and system configuration.

Features


    
 	
  • 9 Models with Maximum Torque from 5 N·m to 1 200 N·m (3.69 lb·ft to 885 lb·ft)
    • 
 	
  • Braking Power: 500 W to 48 kW
    • 
 	
  • Stable Braking Torque
    • 
 	
  • Low Moment of Inertia
    • 
 	
  • Operation in Either Rotational Direction
    • 
 	
  • Braking Torque Measurement Integrated
    • 
 	
  • Integrated Optical Speed Sensor
    • 
 	
  • Special designs available upon request
    • 



Operating Principles

The PB Series - Powder Dynamometers contain, as their name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through friction between rotor and stator. The Powder Dynamometers (PB) produce their rated torque at zero speed. The element to be tested can be loaded at standstill to determine the starting torque.

Optical Speed Sensor
Each PB Series Dynamometer has a standard optical speed sensor. PB 43 has an optical speed sensor with a 30 PPR (Pulses Per Revolution); PB 65, PB 115 & PB 15 has an optical speed sensor with a 60 PPR. For higher speed resolution in low speed applications, Magtrol offers a 600 PPR or 6 000 PPR encoder as an option.
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                    [post_content] => PT Series T-slot Base Plates are used for creating a basic test rig by mounting a Magtrol Dynamometer and/or Torque Transducer in line with the unit to be tested. Its solid, warp-resistant structure and multiple, single-sided T-slots enable modular construction that is cost-effective and easy to assemble.
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