Powder Brake Dynamometers (PB Series)

Powder Brake Dynamometer

Product Description

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 (± 2% for PB 2.7), depending on size and system configuration. Additional mounting possibilities include speed pickup and OEM version IS.

Specifications

ModelRated Torque
(Metric)
Rated Torque
(English)
Rated Speed
(rpm)
Rated Power
(kW)
Max. Speed
(rpm)
Downloads
1 PB 2.7-80.6 N·m84 oz·in3200.023000S pdf | DG pdf
2 PB 2.7-81.2 N·m169 oz·in3200.043000S pdf | DG pdf
4 PB 2.7-82.4 N·m339 oz·in3200.083000S pdf | DG pdf
1 PB 2.7-8K0.6 N·m84 oz·in23900.1510,000S pdf
2 PB 2.7-8K1.2 N·m169 oz·in23900.3010,000S pdf
4 PB 2.7-8K2.4 N·m339 oz·in23900.6010,000S pdf
1 PB 435 N·m44 lb·in9550.504000IS pdf | DG pdf
2 PB 4310 N·m88 lb·in9551.004000IS pdf | DG pdf
1 PB 6525 N·m221 lb·in5701.503000S pdf | IS pdf | DG pdf
2 PB 6550 N·m442 lb·in5703.003000S pdf | IS pdf | DG pdf
1 PB 115100 N·m73 lb·ft4805.003000S pdf | IS pdf | DG pdf
2 PB 115200 N·m147 lb·ft48010.003000S pdf | IS pdf | DG pdf
1 PB 15300 N·m221 lb·ft38212.002000S pdf | IS pdf | DG pdf
2 PB 15600 N·m442 lb·ft38224.002000S pdf | IS pdf | DG pdf
4 PB 151200 N·m885 lb·ft38248.002000S pdf | IS pdf | DG pdf

Key to PDF Drawing Abbreviations

CodeDynamometer Option
SStandard Dynamometer
HSHigh Speed (WB Series only)
ISIndustrial Version
MBMechanical Rotor Blocking Device (WB Series only)
DGSpeed pickup (PB Series only)

Dynamometer Measuring Range

Applications

  • Motors:
    • Combustion engine (automotive, motorcycle, chainsaw, etc.)
    • Hybrid
    • Electric
    • Hydraulic (Aerospace, machinery)
  • Pumps (hydraulic, oil)
  • Propeller (Aerospace, marine, helicopter)
  • Automobile industry, torque measurement on labor and/or production (Formula 1, screen wiper, electrical windows, starter, generator, brake)
  • Reduction gear, gearboxes
  • Clutch, overload clutch
  • Motorized valve drill, pneumatic tools
  • Other machine tools

Model 1WB65 Dynamometer Testing Chainsaw

High acceleration of two stroke engine measurement with special coupling to decrease vibrations.

Model 2PB65-G Dynamometer Testing Starter for Combustion Engine

The dynamometer simulates the car engine for the starter test. The bell is used for measuring the torque coming from the initial rotation of the starter, limiting the inertia of the dynamometer.

System Options

To help you select the components for your motor testing system, this table shows which (currently available) electronics and software support Magtrol’s different types of dynamometers.

ModelDescriptionHysteresis Dynamometers (including ED Series)Eddy-current DynamometersPowder Brake DynamometersDial Weight Dynamometers
DYNAMOMETER CONTROLLERS
DSP7000High-Speed Programmable Dynamometer Controller
6200Dynamometer Controller/Readout
OTHER ELECTRONICS
TSC 401Torque/Speed Conditioner
5500Dynamometer Switch Box
5501Dynamometer Switch Box
SOFTWARE
M-TEST 7Motor Testing Software
POWER SUPPLIES
DES 410/411Power Supply
5241Power AmplifierRequired for HD-825 Only
5200Power Supply
5210Current-Regulated Power Supply
5250Current-Regulated Power Supply
ACCESSORIES
TABDynamometer Tables
AMFAdjustable Motor Fixtures
FMFFixed Motor Fixtures
PTT-Slot Base Plate
FRSFree-Run Speed Sensor
SBB 14Signal Breakout Box

 

Tandem Dynamometers

1 PB 43 + 2 WB 43 mounted in tandem with 3/4 hp single-phase motor and coupling

 

Specifications

ModelDownload
WB/PB 43 Seriespdf
WB/PB 65 Seriespdf
1–2 WB 65 + K + 1–2 PB 65pdf
2 WB 65 + MK + 2 WB 65pdf
WB/PB 115 Seriespdf
2 WB 115 + K + 2 WB 115pdf
WB/PB 15 Seriespdf

 

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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