Eddy-Current Dynamometers (WB Series)

Eddy-Current Dynamometer

Product Description

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. The water cooling in the WB provides 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.

Specifications

ModelRated Torque (Metric)Rated Torque (English)Rated Speed (rpm)Rated Power (kW)Maximum Speed - Standard Version (rpm)Maximum Speed - High-Speed Version (rpm)Downloads
1 WB 230.08 N·m11.24 oz·in20,0000.30100,000100,000step
1 WB 270.15 N·m21.24 oz·in20,0000.30100,000100,000N/A
2 WB 2.7-8K0.30 N·m42 oz·in15,9150.5050,000N/Astep
3 WB 2.7-8K0.45 N·m63 oz·in15,9150.7550,000N/Astep
4 WB 2.7-8K0.60 N·m84 oz·in15,9151.0050,000N/Astep
1 WB 431.50 N·m13 lb·in95501.550,00065,000S pdf | HS pdf |
IS pdf | MB pdf | step
2 WB 433 N·m26 lb·in9550350,00065,000S pdf | HS pdf |
IS pdf | MB pdf | step
1 WB 6510 N·m88 lb·in5730630,00050,000S pdf | HS pdf |
IS pdf | MB pdf | step
2 WB 6520 N·m177 lb·in57301230,00050,000S pdf | HS pdf |
IS pdf | MB pdf | step
1 WB 11550 N·m36 lb·ft28651518,00022,000step
2 WB 115100 N·m73 lb·ft28653018,00022,000step
1 WB 15140 N·m103 lb·ft2390357500N/AMB pdf | step
2 WB 15280 N·m206 lb·ft2390707500N/Astep
3 WB 15420 N·m309 lb·ft23901057500N/Astep
4 WB 15560 N·m413 lb·ft23901407500N/Astep

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

Magtrol offers Eddy-Current and Powder Dynamometers mounted in tandem. In tandem, the unique features of each type of dynamometer brake are utilized, allowing the unit under test to be applied with nominal braking torque from zero speed to maximum rotation. The Tandem Dynamometers are available on a number of PB/WB combinations.

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 AMF Series Adjustable Motor Fixtures are used to secure small to medium-sized motors in place while running any test. These extremely versatile fixtures also enable easy motor centering for coupling to a Magtrol HD Series Hysteresis Dynamometer. (Couplings can be supplied upon request.) Various motor lengths are accommodated by either an attached T-slotted base plate or sliding base, depending on the model.

The AMF-1, -2 and -3 Fixtures feature one or two adjustable bridges, each fitted with a fluted knob clamp screw, to allow clamping anywhere along the axis of the motor. The adjustable bridge on the AMF-V Fixture incorporates a straight-line action clamp with a V-angle rubber padded clamp to maximize the mounting area.

To safeguard the motor, locking thumb screws provide protection against vibration and all motor-to-fixture contact surfaces are nylon padded for scratch-free clamping.
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                    [post_content] => Magtrol’s TORQUE 10 Software is an easy to use Windows® executable program, used to automatically collect torque, speed, mechanical power and angle data from Magtrol TS Series Torque Sensors or Magtrol TM Series Torque Sensors by using Model 3411 Torque Display. The data can be printed, displayed graphically or quickly saved/exported as a Microsoft® Excel spreadsheet.

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Ordering Information

TORQUE 10 is now included with the purchase of a TS Series Torque Sensor or Model 3411 Torque Display. [post_title] => TORQUE 10 Software [post_excerpt] => Download Torque 10 Software [post_status] => publish [comment_status] => open [ping_status] => closed [post_password] => [post_name] => torque-10-software [to_ping] => [pinged] => [post_modified] => 2019-05-20 10:15:47 [post_modified_gmt] => 2019-05-20 14:15:47 [post_content_filtered] => [post_parent] => 0 [guid] => https://www.magtrol.com/?post_type=product&p=570 [menu_order] => 10 [post_type] => product [post_mime_type] => [comment_count] => 0 [filter] => raw ) [2] => 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] => 2018-01-30 21:00:00 [post_modified_gmt] => 2018-01-30 21:00:00 [post_content_filtered] => [post_parent] => 0 [guid] => https://www.magtrol.com/?post_type=product&p=613 [menu_order] => 34 [post_type] => product [post_mime_type] => [comment_count] => 0 [filter] => raw ) ) [post_count] => 3 [current_post] => -1 [in_the_loop] => [post] => WP_Post Object ( [ID] => 783 [post_author] => 1 [post_date] => 2017-04-05 18:46:23 [post_date_gmt] => 2017-04-05 18:46:23 [post_content] => Magtrol’s AMF Series Adjustable Motor Fixtures are used to secure small to medium-sized motors in place while running any test. These extremely versatile fixtures also enable easy motor centering for coupling to a Magtrol HD Series Hysteresis Dynamometer. (Couplings can be supplied upon request.) Various motor lengths are accommodated by either an attached T-slotted base plate or sliding base, depending on the model. The AMF-1, -2 and -3 Fixtures feature one or two adjustable bridges, each fitted with a fluted knob clamp screw, to allow clamping anywhere along the axis of the motor. The adjustable bridge on the AMF-V Fixture incorporates a straight-line action clamp with a V-angle rubber padded clamp to maximize the mounting area. To safeguard the motor, locking thumb screws provide protection against vibration and all motor-to-fixture contact surfaces are nylon padded for scratch-free clamping. [post_title] => AMF Adjustable Motor Fixtures [post_excerpt] => [post_status] => publish [comment_status] => open [ping_status] => closed [post_password] => [post_name] => amf-adjustable-motor-fixtures [to_ping] => [pinged] => [post_modified] => 2019-10-09 11:01:24 [post_modified_gmt] => 2019-10-09 15:01:24 [post_content_filtered] => [post_parent] => 0 [guid] => https://www.magtrol.com/?post_type=product&p=783 [menu_order] => 40 [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] => 83ff027b692d6c9e973f1579c7be7bce [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 ) )