WB/PB 43 Data Sheet WB/PB 43 Series Eddy-Current and Powder Dynamometers Features • • • • • • • • • • 4 Models with Maximum Torque from 1.5 N·m to 10 N·m (1.1 lb·ft to 7.3 lb·ft) Braking Power: 0.5 kW to 3 kW Stable Braking Torque, without Shock Low Moment of Inertia Low Residual Torque Operation in Either Rotational Direction Braking Torque Measurement Included High Rotational Speed Rated Torque Available From Zero Speed (Powder Dynamometers) Integrated Optical Speed Sensor Model 2 WB 43 Eddy-Current Dynamometer Motor Testing SYSTEMS Eddy-Current Brake Dynamometers (WB series) are ideal for Magtrol’s M-TEST 7 Software is a state-of-the-art motor applications requiring high speeds and also when operating in testing program for Windows®-based data acquisition. Used the middle to high power range. Eddy-Current Brakes provide with a Magtrol DSP7000 Programmable Dynamometer increasing torque as the speed increases, reaching peak torque Controller, Magtrol M-TEST 7 Software provides the control at rated speed. The dynamometers have low inertia as a result of any Magtrol Eddy-Current or Powder Brake Dynamometer of small rotor diameter. Brake cooling is provided by a water and runs test sequences in a manner best suited to the overall circulation system, which passes inside accuracy and efficiency of the Magtrol the stator to dissipate heat generated by Magtrol offers three types of dynamometer Motor Test System. The data that is the braking power. The water cooling brakes to absorb load: Hysteresis, Eddy- generated by Magtrol’s Motor Testing in the WB provides high continuous Current and Magnetic Powder. Each type Software can be stored, displayed and of Dynamometer has advantages and power ratings (max. 3 kW). printed in tabular or graphic formats, limitations and choosing the correct one will and can be easily imported into a Powder Brake Dynamometers (PB depend largely on the type of testing to be spreadsheet. series) are ideal for applications operating performed. With over 50 models to choose in the low to middle speed range or from, Magtrol Sales professionals are readily Written in LabVIEW™, M-TEST 7 has when operating in the middle to high available to assist in selecting the proper the flexibility to test a majority of motor torque range. Powder Brakes provide Dynamometer to meet your testing needs. types in a variety of ways. Because of full torque at zero speed and are waterLabVIEW’s versatility, obtaining data cooled, allowing for power ratings up to 1 kW. Both WB and from other sources (e.g. thermocouples), controlling motor PB Dynamometers have accuracy ratings of ±0.3% to ±0.5% full power and providing audio/visual indicators is relatively easy. scale, depending on size and system configuration. Magtrol’s M-TEST 7 Software is ideal for simulating loads, cycling the unit under test and motor ramping. Because it is Applications easy to gather data and duplicate tests, the software is ideal for use in engineering labs. Tests can be programmed to run Mounted on test benches, WB/PB 43 Series Dynamometers on their own and saved for future use allowing for valuable allow performance and reliability testing on driving elements time savings in production testing and incoming/outgoing such as electric motors, combustion engines, hand-held drills, inspection. windshield wiper motors, servomotors, fans, geared motors, reduction gears, pneumatic equipment, hydraulic transmission systems and motors for domestic appliances. 1

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, which employ a unique non-contact differential transformer torque measuring technology providing extremely accurate torque and speed measurement with superior electrical noise immunity....

Eddy-current dynamometer OPERATING PRINCIPLES The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The 43 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 De-energized mN·m Nominal Input Inertia Max. Speed Rated Rated Excitation standard high-speed Current* Power Speed version version (HS) kW Optical Speed Sensor Cooling Water Consumption Each 43 Series WB Dynamometer has an optical speed sensor with a 30-bit pulse wheel delivered as...

Powder 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. PB dynamometer ratings Rated Torque Drag Torque De-energized Nominal Input Inertia Rated Power Rated Speed Excitation Current*...

Single Dynamometer Dimensions A T (removable calibration arm) *Use outer groove to achieve calibration in N·m when using weight in kg Reference surface Cooling water connection Ø 10 mm (≈0.39 in) NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. Model Shaft of high speed version (HS) is Ø 20-h6 mm, smooth (no key), with different length. Drawing on request or available at www.magtrol/support/salesdrawings.htm

Tandem Specifications Tandem 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. An electromagnetic clutch is needed for this application which automatically switches off at the maximum speed of the PB Powder Dynamometer and automatically switches on at zero speed. tandem dynamometer ratings Drag Torque De-energized Rated Torque Rated Max. Excitation Speed Speed Current* Rated Power Nominal Input Inertia...