4 Quadrant Dynamometer Test System

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Product Description

Magtrol’s 4 quadrant motorized dynamometers provides expanded testing flexibility over a typical braking dynamometer.  With the ability to bring the motor under test (MUT) to synchronous RPM before beginning a test, repeatability is improved.   Since the motor windings are at ambient temperature before starting a ramp test, wattage is more consistent. Custom Software is required in order meet the specific needs of each individual customer’s application. Since Magtrol’s TM series torque transducers are used between the dynamometer motor and the MUT, we are able to measure the friction and windage of the MUT.

Magtrol provides two systems with 4 quadrants.
– The AC Induction for your larger motors that require higher speed and larger torque.
– The Servo Motor system is for smaller and more precise tests that require slower speeds with finer accuracy.

AC Induction

  • Horizontal or Vertical orientation
  • Blower cooled
  • Full torque at zero speed – hold position / hold zero speed
  • True zero torque, (no load)
  • Closed-loop torque control
  • Steel Table
  • Coupling guard
  • Stall-torque capability
  • Adjustable motor mounting platform for optimum flexibility
  • AC vector drive for dynamometer motor with optional regenerative feature
  • Back EMF can be measured in DC motors
  • Reversible operation
  • Magtrol’s exclusive M-Test software
  • Dynamic performance testing

Servo Motor

  • Exchangeable troque transducer modules for easy range scaling
  • Servo motor and drive with couplings
  • Movable table with caster leveling wheels
  • Computer with rack mount keyboard and monitor
  • Servo Bridge mounted on isolation mounts
  • Measure drag torque, windage and bearing friction
  • Measure the back emf of a motor while driving it at programmable speeds
  • Evaluate the smoothness of a motor to changes in speed and torque load
  • Full data acquisition capability
  • Speeds for 0 to 6000 RPM, torque levels from fractions of a Nm up to 25Nm
  • M-Test software
  • Coupling guard
  • E-Stop
  • Operator work surface on table top

Specifications

System TypePower (hp)Power (kW)Torque (N·m)Torque (lb·ft)Speed (RPM)
AC Induction201450363600
7520143600
10750362000
1072001472000
Servo Motor6510.727
10720144000
20151073000

Applications

Motor Simulation:  Precise simulation of torque load and speed allows the AC Dynamometer to replace expensive durability stands and run in chambers.

Inertia Simulation:  Simulate in process operations.

Full Torque Stall:  Application of full torque including overload at zero RPMs.

Low Speed:  Provide tight control at very low speeds
(>  5 RPM).

In-Line Torque Measurement:  Allows for high accuracy torque control at different ranges.

System Options

Basic System Includes:

Table components
– Computer
– Keyboard
– Monitor
– Controller
– Power analyzer
– E-Stop
Table
– Table assembly made from extruded aluminum
– locking casters with leveling pads
– Vibration isolated top plate
– Monitor with monitor arm
– Electrically interlocked guarding
Servo Bridge Assembly
– Motor servo
Encoder Assembly
– Removable encoder plate (See ranges)
– Exchangeable torque transducer modules for easy range scaling
– Coupling guard

Options:

– Full torque stall –Application of full torque
– Inertia Simulation – Simulates in process operations
– Automated locked rotor capability
– Temperature recording, up to 48 thermocouple inputs
– Resistance Measurement Testing
– Various MUT power supplies can be integrated
– MUT cooling fan
– Back EMF in DC motors
– Moving locked rotor
– Running heating temperature test
– Locked rotor temperature test
– AC or DC power supply
– Custom software available

Dynamometer Selection

Magtrol Dynamometers cover a wide range of Torque, Speed and Mechanical Power ratings. To select the appropriate size Dynamometer for your motor testing needs, you will need to determine the Maximum Torque, Speed and Power applied to the Dynamometer:

Maximum Torque

It is important to consider all torque points that are to be tested, not only rated torque, but also Locked Rotor and Breakdown Torque. Dynamometer selection should initially be based on the maximum torque requirement, subject to determining the maximum power requirements.

Maximum Speed

This rating is to be considered independent of torque and power requirements, and is the maximum speed at which the Dynamometer can be safely run under free run or lightly loaded conditions. It is not to be considered as the maximum speed at which full braking torque can be applied.

Maximum Power Ratings

These ratings represent the maximum capability of the Dynamometer Braking System to absorb and dissipate heat generated when applying a braking load to the motor under test. The power absorbed and the heat generated by the Dynamometer is a function of the Torque (T) applied to the motor under test, and the resulting speed (n) of the motor. This is expressed in these power (P) formulas:

SI:P (watts)=T (N·m)xn (rpm)x(1.047 × 10-1)
English:P (watts)=T (lb·in)xn (rpm)x(1.183 × 10-2)
Metric:P (watts)=T (kg·cm)xn (rpm)x(1.027 × 10-2)
All of Magtrol's controllers, readouts and software calculate horsepower
as defined by 1 hp = 550 lb·ft / s. Using this definition:
hp=P (watts)/745.7
To calculate power, use Magtrol's online motor power calculator

The Dynamometer’s ability to dissipate heat is a function of how long a load will be applied. For this reason, the Maximum Power ratings given are based on continuous operation under load, as well as a maximum of 5 minutes under load.

To safely dissipate heat and avoid Dynamometer failure, the maximum power rating
is the most important consideration in selecting a Dynamometer.

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                    [post_content] => Magtrol's Model DSP7000 High-Speed Programmable. Dynamometer Controller employs state-of-the-art Digital Signal Processing Technology to provide superior motor testing capabilities. Designed for use with any Magtrol Hysteresis, Eddy-Current or Powder Brake Dynamometer, Magtrol In-Line Torque Transducer or auxiliary instrumentation, the DSP7000 can provide complete PC control via IEEE-488 or RS-232 interface. With up to 500 readings per second, the DSP7000 is ideally suited for both the test lab and the production line.
                    [post_title] => DSP7000 High Speed Programmable Controller
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                    [post_content] => Magtrol's M-TEST 7 is a state-of-the-art motor testing program for PC (Windows® 7 SP1) based data acquisition. Used with a Magtrol Programmable Dynamometer Controller, M-TEST 7 works with any Magtrol Dynamometer or In-Line Torque Transducer to help determine the performance characteristics of a motor under test. Up to 63 parameters are calculated and displayed utilizing M-TEST 7's feature-rich testing and graphing capabilities.

National Instruments LabVIEW an integral component of any Magtrol Motor Test System, M-TEST 7 performs ramp, curve, manual, pass/fail, coast, temperature, locked rotor temperature and running heating temperature tests in a manner best suited to the overall efficiency of the test rig. Written in LabVIEW™, M-TEST 7 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.

NOTE: M-TEST 7 does not support the following:
  • 5240, 4629B or older controllers
  • 4612B, 4614B or older power analyzers
  • National Instruments FieldPoint analog I/O
  • Advantech PCL-725, PCI-1760 digital I/O
**MTEST-7 Motor Test Software is offered as a single seat license. Additional seats can be purchased and added to the original license. Contact sales for pricing.** [table id=21 /]

License Verification via Crypkey Casper E-Register

Casper eRegister provides automatic authorization of M-TEST 7 using serial numbers. With this solution, the customer pre-pays the license fee and is then provided with a serial number to automatically obtain a code to unlock M-TEST 7 via the Internet. Casper eRegister works 24/7/365, without human intervention. Just click on the electronic registration button on the M-TEST 7 license configuration screen.

Analog Input Measurement

Up to 128 thermocouples or 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. M-TEST 7, with its complete dynamometer control, even allows for analog measurement while performing load simulation for duty cycle and life testing.

Applications

M-TEST 7—besides being well-suited for simulating loads, cycling the unit under test and motor ramping—is also ideal for production line and inspection applications, due to its pass/fail test function. Another time-saving feature that engineering labs will benefit from, is the ability to duplicate tests and run them automatically. This versatile program is extremely valuable to anyone involved in motor testing.

System Minimum Requirements

  • Personal computer with Intel® Pentium® IV processor (or equivalent)
  • Microsoft® Windows® 7 SP1
  • 2 GB RAM
  • 1 GB of available hard drive space
  • VGA color monitor with minimum screen resolution of 1024 × 768
  • National Instruments™ PCI-GPIB card, GPIB-USB-HS Interface(available from Magtrol)
  • RS-232 serial interface can be used, instead of GPIB card, for interfacing with Magtrol DSP6000, DSP6001 or DSP7000 Controllers. In addition, a USB Interface can be used with the DSP7000 Controller.

M-TEST 7 Viewer

M-TEST 7 Viewer allows the user to create and modify test setups, and view, graph and compare data – everything standard M-TEST 7 does except perform tests. Free download, unlimited use.

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