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WB/PB 2.7 Series | Eddy-Current and Powder Dynamometers

WB/PB 2.7 Series | Eddy-Current and Powder Dynamometers
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WB/PB 2.7 Series | Eddy-Current and Powder Dynamometers - 1

WB/PB 2.7 Data Sheet Magtrol offers three types of dynamometer brakes to absorb load: Hysteresis, Eddy Current and Magnetic Powder. Each type of Dynamometer has advantages and limitations and choosing the correct one will depend largely on the type of testing to be performed. With over 50 models to choose from, Magtrol Sales professionals are readily available to assist in selecting the proper Dynamometer to meet your testing needs. FEATURES • 9 Models with Maximum Torque from 300 mN-m to 2400 mN-m (42 oz-in to 340 oz-in) • Braking Power: 20 W to 1 kW • Stable Braking Torque, without Shock • Low Moment of Inertia • Low Residual Torque • Operation in Either Rotational Direction • Braking Torque Measurement Included • Optional Speed Measurement • Rated Torque Available From Zero Speed (Powder Dynamometers) • Integrated Optical Speed Sensor 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. 1 kW). Powder Brake Dynamometers (PB series) are ideal for applications operating in the low to middle speed range or when operating in the middle to high torque range. Powder Brakes provide full torque at zero speed and are water-cooled, allowing for power ratings up to 600 W. Both WB and PB Dynamometers have accuracy ratings of ± 2% full scale - depending on size and system configuration. APPLICATIONS Mounted on test benches, the WB/PB 2.7 Series Dynamometers allow performance and reliability testing on driving elements such as servomotors, micromotors for cameras, small fans, dental drills, geared motors, small reduction gears, pneumatic equipment, hydraulic transmission systems and motors for small domestic appliances. MOTOR TESTING SYSTEMS Magtrol’s M-TEST 7 Software is a state-of-the-art motor testing program for Windows®-based data acquisition. Used with a Magtrol DSP7000 Programmable Dynamometer Controller, Magtrol M-TEST 7 Software provides the control of any Magtrol Eddy-Current or Powder Brake Dynamometer and runs test sequences in a manner best suited to the overall accuracy and efficiency of the Magtrol Motor Test System. The data that is generated by Magtrol’s Motor Testing Software can be stored, displayed and printed in tabular or graphic formats, and can be easily imported into a spreadsheet. Written in LabVIEW™, M-TEST 7 has the flexibility to test a majority of motor types in a variety of ways. Because of LabVIEW’s versatility, obtaining data from other sources (e.g. thermocouples), controlling motor power and providing audio/visual indicators is relatively easy. Magtrol’s M-TEST 7 Software is ideal for simulating loads, cycling the unit under test and motor ramping. Because it is easy to gather data and duplicate tests, the software is ideal for use in engineering labs. Tests can be programmed to run on their own and saved for future use allowing for valuable time savings in production testing and incoming/outgoing inspection.

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WB/PB 2.7 Series | Eddy-Current and Powder Dynamometers - 2

System Configurations Single Dynamometer Configurations The Dynamometers can be complemented by various electronic modules such as the DES 410 Power Supply, TSC 401 Torque/ Speed Conditioner and DSP7000 High Speed Programmable Dynamometer Controller. Eddy-Current (WB) OR Powder Brake (PB) Dynamometer Torque Excitation DSP7001 Dynamometer Controller PC M-TEST USB Magtrol also offers In-Line Torque Transducers for extremely accurate torque and speed measurement with high noise immunity. The transducers employ a unique non-contact differential transformer torque measuring technology which...

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WB/PB 2.7 Series | Eddy-Current and Powder Dynamometers - 3

Eddy-current dynamometer OPERATING PRINCIPLES The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The 2.7 Series is particularly intended for motors which rotate at high speeds, up to 50,000 rpm. The braking torque depends on the rotation speed. WB dynamometer ratings Model Drag Torque Nominal Input Inertia De-energized mN·m Rated Power Excitation Current* standard version Rated Speed Optical Speed Sensor Cooling Water Consumption Each 2.7 Series WB Dynamometer has an optical speed sensor with a 30-bit pulse wheel delivered as standard. For all WB models: ≈ 30...

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WB/PB 2.7 Series | Eddy-Current and Powder Dynamometers - 4

Q SpecificationsPOWDER DYNAMOMETER OPERATING PRINCIPLES The PB 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 2.7 Series PB Dynamometer has an optical speed sensor with a 30-bit pulse...

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WB/PB 2.7 Series | Eddy-Current and Powder Dynamometers - 5

Q Dimensions DYNAMOMETERS WITH COOLING OIROUIT

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WB/PB 2.7 Series | Eddy-Current and Powder Dynamometers - 6

DYNAMOMETERS WITHOUT COOLING CIRCUIT NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places.

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WB/PB 2.7 Series | Eddy-Current and Powder Dynamometers - 7

Q Ordering Information WB/PB 2.7 Q Ordering Information WB/PB 2.7 DYNAMOMETER OPTIONS Vertical Mounting (V) Vertical Mounting is available on the Eddy-Current (WB) Dynamometer only. The vertical version has an adapted bearing fitting and its maximum speed is limited. Mechanical Rotor Blocking Device (MB) A mechanical rotor blocking device, which allows locked rotor testing, is available for the WB Dynamometer. ORDERING INFORMATION If one of the listed options is desired, please follow the dynamometer model (see table above) with a dash and then the appropriate suffix (as noted in...

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