Tandem Series – In-Line Double Dynamometers

Product Description

Eddy-current Brake Dynamometers (WB series) provide increasing torque as the speed increases, reaching peak torque at rated speed. They are ideal for applications requiring high speeds and also when operating in the middle to high power range. Powder Brake Dynamometers (PB Series) provide full torque at zero speed and are ideal for applications operating in the low to middle speed range or when operating in the middle to high torque range.

Tandem Dynamometers are based on the combination of Eddy-current Dynamometers (WB series) and Powder Dynamometers (PB series) mounted in line on a common base and connected by an electromagnetic clutch. Both dynamometers are cooled by a water circulation system, which passes inside the stator to dissipate heat generated by the braking power, allowing a power rating up to 140 kW. Both WB and PB Dynamometers integrate a torque measurement system with accuracy ratings of ± 0.3 % to ± 0.5 % full scale, depending on size and system configuration.

Features

  • 13 Models with Maximum Torque from 5 N·m to 1 200 N·m (3.6 lb·ft·in to 885 lb·ft)
  • Braking Power: 3 kW to 140 kW
  • Stable Braking Torque, without Shock
  • Low Moment of Inertia
  • Operation in Either Rotational Direction
  • Braking Torque Measurement Integrated
  • Integrated Optical Speed Sensor
  • Special designs available upon request

Operating Principles

Because the characteristics of the WB and PB dynamometers are complementary, Magtrol is able to offer them mounted in a tandem setup. Each dynamometer (WB and PB) can autonomously operate according to its own characteristics (Please refer to specific data sheet). An electromagnetic clutch will automatically switch off at the maximum speed of the PB Powder Dynamometer and automatically switch on at zero speed. Once the system is running over the PB Powder Dynamometer speed limit, the clutch cannot be switched on until the system returns to 0 rpm (no longer rotating).

Double WB Dynamometer in Tandem Setup
For applications requiring higher power in a dedicated speed range, Magtrol offers some of the Eddy Current Dynamometers mounted in line on a common base. For example: models 2 WB 65 + 2 WB 65 (rated torque 40 N·m, max speed 24 000 rpm, max power 24 kW) or 2 WB 115 + 2 WB 115 (rated torque 200 N·m, max speed 15 000 rpm, max power 60 kW).

Optical Speed Sensor
Each TANDEM has an optical speed sensor delivered as standard. TANDEM 43 has an optical speed sensor with a 30-PPR encoder; TANDEM 65, TANDEM 115 & TANDEM 15 have an optical speed sensor with a 60-PPR encoder.

System Configuration

Specifications

NOTE: For continuous operating (≥ 2 hours) at constant torque or power, please consider 20% reserve in both torque & power

MODELRATED TORQUE
[N·m]
RATED TORQUE
[lb·ft]
RATED POWER
[kW]
RATED SPEED
[rpm]
MAX. SPEED
[rpm]
MAX. EXCITED
SPEED OF PB
[rpm] a)
2 WB 43 + 1 PB 4353.639 55025 0004 000
2 WB 43 + 2 PB 43107.339 55025 0004 000
2 WB 65 + 1 PB 652518.4125 73018 0003 000
2 WB 65 + 2 PB 655036.8125 73018 0003 000
2 WB 115 + 1 PB 11510073.7302 86515 0003 000
2 WB 115 + 2 PB 115200147.5302 86515 0003 000
2 WB 115 + 2 WB 115200147.5602 86515 0003 000
2 WB 15 + 1 PB 15300221702 3907 5002 000
2 WB 15 + 2 PB 15600442702 3907 5002 000
2 WB 15 + 4 PB 151 200885702 3907 5002 000
4 WB 15 + 1 PB 153002211402 3907 5002 000
4 WB 15 + 2 PB 156004421402 3907 5002 000
4 WB 15 + 4 PB 151 2008851402 3907 5002 000

a) Corresponds to the speed at which the clutch will be disconnected

Applications

Mounted on test benches, Tandem Dynamometers allow performance and reliability testing on driving elements such as electric motors, servomotors, geared motors, reduction gears, pneumatic equipment, hydraulic transmission systems and starter motors.

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
DSP7010Dynamometer Controller
DSP7000High-Speed Programmable Dynamometer Controller
OTHER ELECTRONICS
TSC SeriesTorque/Speed Conditioner
5500Dynamometer Switch Box
5501Dynamometer Switch Box
5502Dynamometer Switch Box
5503Dynamometer Switch Box
SOFTWARE
M-TEST 7Motor Testing Software
POWER SUPPLIES
DES SeriesPower Supply
5241Power AmplifierRequired for HD-825 Only
5242Power 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
SBB14Signal Breakout Box
SBB15Signal Breakout Box

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_author] => 1
                    [post_date] => 2017-04-05 13:55:52
                    [post_date_gmt] => 2017-04-05 13:55:52
                    [post_content] => Magtrol's M-TEST 7 is a state-of-the-art motor testing program for PC (Windows® 10/11 64-bit) 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® i5 processor (or equivalent)
  • Microsoft® Windows® 10/11 64-bit
  • 8 GB RAM
  • 5 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).  The GPIB card can be used for interfacing with Magtrol DSP6000, DSP6001 or DSP7000 Controllers.
  •  In addition, a USB Interface can be used with the DSP7000 or DSP7010 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.

Download M-TEST 7 Viewer [post_title] => M-TEST 7 - Motor Testing Software [post_excerpt] => Download free 30 day trial of M-TEST 7 Motor Testing Software. [post_status] => publish [comment_status] => open [ping_status] => closed [post_password] => [post_name] => m-test-7-motor-testing-software [to_ping] => [pinged] => [post_modified] => 2024-03-27 16:05:23 [post_modified_gmt] => 2024-03-27 20:05:23 [post_content_filtered] => [post_parent] => 0 [guid] => https://www.magtrol.com/?post_type=product&p=522 [menu_order] => 29 [post_type] => product [post_mime_type] => [comment_count] => 0 [filter] => raw ) [1] => WP_Post Object ( [ID] => 613 [post_author] => 1 [post_date] => 2017-04-05 15:38:07 [post_date_gmt] => 2017-04-05 15:38:07 [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 [post_excerpt] => [post_status] => publish [comment_status] => open [ping_status] => closed [post_password] => [post_name] => dsp7000-high-speed-programmable-controller [to_ping] => [pinged] => [post_modified] => 2023-09-29 11:25:25 [post_modified_gmt] => 2023-09-29 15:25:25 [post_content_filtered] => [post_parent] => 0 [guid] => https://www.magtrol.com/?post_type=product&p=613 [menu_order] => 57 [post_type] => product [post_mime_type] => [comment_count] => 0 [filter] => raw ) [2] => WP_Post Object ( [ID] => 507 [post_author] => 1 [post_date] => 2017-04-05 13:21:38 [post_date_gmt] => 2017-04-05 13:21:38 [post_content] => Eddy-Current Brake Dynamometers (WB Series) are ideal for applications requiring high speeds and also when operating in the middle to high power range. Eddy-Current Brakes provide increasing torque as the speed increases, reaching peak torque at rated speed. The dynamometers have low inertia as a result of small rotor diameter. Brake cooling is provided by a water circulation system, which passes inside the stator to dissipate heat generated by the braking power, providing high continuous power ratings (max. 140 kW). The WB dynamometers have accuracy ratings of ± 0.3% to 0.5% full scale (± 2% for WB 2.7), depending on size and system configuration. Additional options include: high-speed version, speed pickup, mechanical rotor blocking device, OEM version IS and vertical mounting.

Features

  • 13 Models with Maximum Torque from 300 mN·m to 560 N·m (42 oz·in to 413 lb·ft)
  • Braking Power: from 500 W to 140 kW
  • Stable Braking Torque, without Shock
  • Low Moment of Inertia
  • Low Residual Torque
  • Operating Direction CW / CCW
  • Braking Torque Measurement Integrated
  • High Rotational Speed
  • Integrated Optical Speed Sensor
  • Special designs available upon request

Operating Principles

The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The WB Series is particularly intended for motors which rotate at high speeds, up to 65 000 rpm (up to 100 000 rpm with WB 23 / 27; see specific datasheet). The braking torque depends on the rotation speed. Optical Speed Sensor Each WB Series Dynamometer has an optical speed sensor delivered as standard. WB 2.7 & WB 43 has an optical speed sensor with a 30-PPR encoder; WB 65, WB 115 & WB 15 has an optical speed sensor with a 60-PPR encoder. [post_title] => WB Series - Eddy-Current Dynamometers [post_excerpt] => [post_status] => publish [comment_status] => open [ping_status] => closed [post_password] => [post_name] => eddy-current-dynamometers-wb-series [to_ping] => [pinged] => [post_modified] => 2023-04-13 15:03:20 [post_modified_gmt] => 2023-04-13 19:03:20 [post_content_filtered] => [post_parent] => 0 [guid] => https://www.magtrol.com/?post_type=product&p=507 [menu_order] => 46 [post_type] => product [post_mime_type] => [comment_count] => 0 [filter] => raw ) [3] => WP_Post Object ( [ID] => 512 [post_author] => 1 [post_date] => 2017-04-05 13:31:33 [post_date_gmt] => 2017-04-05 13:31:33 [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 (± 2% for PB 2.7), depending on size and system configuration. Additional mounting possibilities include speed pickup and OEM version IS.

Features

  • 12 Models with Maximum Torque from 600 mN·m to 1 200 N·m (84 oz·in to 885 lb·ft)
  • Braking Power: 150 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 an optical speed sensor delivered as standard. PB 2.7 & PB 43 has an optical speed sensor with a 30-PPR encoder; PB 65, PB 115 & PB 15 has an optical speed sensor with a 60-bits pulse wheel. For higher speed resolution in low speed applications, Magtrol offers a 600-PPR or 6000-PPR encoder as an option. [post_title] => PB Series - Powder Brake Dynamometers [post_excerpt] => [post_status] => publish [comment_status] => open [ping_status] => closed [post_password] => [post_name] => powder-brake-dynamometers-pb-series [to_ping] => [pinged] => [post_modified] => 2023-04-13 15:03:44 [post_modified_gmt] => 2023-04-13 19:03:44 [post_content_filtered] => [post_parent] => 0 [guid] => https://www.magtrol.com/?post_type=product&p=512 [menu_order] => 47 [post_type] => product [post_mime_type] => [comment_count] => 0 [filter] => raw ) ) [post_count] => 4 [current_post] => -1 [in_the_loop] => [post] => WP_Post Object ( [ID] => 522 [post_author] => 1 [post_date] => 2017-04-05 13:55:52 [post_date_gmt] => 2017-04-05 13:55:52 [post_content] => Magtrol's M-TEST 7 is a state-of-the-art motor testing program for PC (Windows® 10/11 64-bit) 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® i5 processor (or equivalent)
  • Microsoft® Windows® 10/11 64-bit
  • 8 GB RAM
  • 5 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).  The GPIB card can be used for interfacing with Magtrol DSP6000, DSP6001 or DSP7000 Controllers.
  •  In addition, a USB Interface can be used with the DSP7000 or DSP7010 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.

Download M-TEST 7 Viewer [post_title] => M-TEST 7 - Motor Testing Software [post_excerpt] => Download free 30 day trial of M-TEST 7 Motor Testing Software. [post_status] => publish [comment_status] => open [ping_status] => closed [post_password] => [post_name] => m-test-7-motor-testing-software [to_ping] => [pinged] => [post_modified] => 2024-03-27 16:05:23 [post_modified_gmt] => 2024-03-27 20:05:23 [post_content_filtered] => [post_parent] => 0 [guid] => https://www.magtrol.com/?post_type=product&p=522 [menu_order] => 29 [post_type] => product [post_mime_type] => [comment_count] => 0 [filter] => raw ) [comment_count] => 0 [current_comment] => -1 [found_posts] => 0 [max_num_pages] => 0 [max_num_comment_pages] => 0 [is_single] => [is_preview] => [is_page] => [is_archive] => 1 [is_date] => [is_year] => [is_month] => [is_day] => [is_time] => [is_author] => [is_category] => [is_tag] => [is_tax] => [is_search] => [is_feed] => [is_comment_feed] => [is_trackback] => [is_home] => [is_404] => [is_embed] => [is_paged] => [is_admin] => [is_attachment] => [is_singular] => [is_robots] => [is_posts_page] => [is_post_type_archive] => 1 [query_vars_hash:WP_Query:private] => 4e8cab5a483617ed1307c2a2d33abf6a [query_vars_changed:WP_Query:private] => [thumbnails_cached] => [stopwords:WP_Query:private] => [compat_fields:WP_Query:private] => Array ( [0] => query_vars_hash [1] => query_vars_changed ) [compat_methods:WP_Query:private] => Array ( [0] => init_query_flags [1] => parse_tax_query ) )