Product Description
When torque control/torque measurement must be performed at the highest possible power, Magtrol AHB Series Hysteresis Brakes are ideal. Passages running through the brakes enables compressed air cooling, providing excellent heat dissipation. This design allows for continuous power ratings up to 3000 watts (5300 watts intermittent). Use of pre-loaded bearings in the AHB Series Hysteresis Brakes allows operation at speeds of up to 25,000 rpm for extended durations. AHB Brakes are conveniently base mounted. Base mounting, with integral barrier type terminal strip, provides easy mounting and wiring.
Specifications and Drawings
For complete technical specifications, including power absorption curves, download the data sheet. For detailed dimension drawings…
Click on the PDF icon in the table below. A PDF document will open in a new window. (Adobe Acrobat Reader 7.0, or later, is required.)
Brake Ratings
| Model | Minimum Torque at Rated Current (N·m) | Rated Current (mA) | Max. Speed (rpm) | Kinetic Power with Air - 5 Minutes (W)a) | Kinetic Power with Air - Continuous (W)a) | Kinetic Power without Air - 5 Minutes (W)a) | Kinetic Power without Air - Continuous (W)a) | Downloads |
|---|
| AHB-0.3c) | 0.30 | 300 | 25000 | 500 | 500 | 90 | 25 | pdf | step | curve |
| AHB-0.75c) | 0.65 | 400 | 35000 | 1200 | 1200 | 250 | 55 | pdf | step | curve |
| AHB-1 | 1.00 | 400 | 25000 | 1200 | 1200 | 250 | 55 | pdf | step | curve |
| AHB-1.5 | 1.50 | 400 | 25000 | 1300 | 1300 | 450 | 70 | pdf | step | curve |
| AHB-3 | 3.00 | 750 | 20000 | 1800 | 1800 | 800 | 160 | pdf | step | curve |
| AHB-3.3b) | 3.30 | 800 | 25000 | 2000 | 1400 | 800 | 140 | pdf | step | curve |
| AHB-5 | 5.00 | 380 | 15000 | 2500 | 1000 | 1300 | 120 | pdf | step | curve |
| AHB-6 | 6.00 | 1500 | 20000 | 3000 | 3000 | 1400 | 225 | pdf | step | curve |
| AHB-12 | 12.00 | 1200 | 12000 | 2800 | 1800 | 2200 | 250 | pdf | step | curve |
| AHB-24 | 24.00 | 2400 | 12000 | 5300 | 3000 | 4000 | 450 | pdf | step | curve |
a) Kinetic power ratings are maximum values based on limiting coil and/or bearing temperature to approximately 100 ºC, and should not be exceeded.
b) The AHB-3.3 has a lower inertia and higher speed than the AHB-3.
c) Designed with utilizing angular contact bearings, the AHB-0.3 & AHB‑0.75 were designed for severe application. These applications include, but are not limited to, high vibration or high radial and/or axial loading.
*Standard coil voltage is 24 VDC. 90 volt, 12 volt and non-standard coil voltages are available on request.
**Angular Acceleration values are available upon request.
***To prevent damage to the power supply from inductive kickback, connect a diode rated at greater than or equal to the power supply’s output voltage and current across the brake leads. Connect the cathode to the positive lead and the anode to the negative lead.
Air Requirements
| Model | Air Supply Pressure (PSI) | Air Supply Pressure (bar) | Air Supply Pressure (kPa) | Air Volume / Consumption (SCFM) | Air Volume / Consumption (l/min) | Supply Tube Fitting -
Outer Diameter (mm) | Supply Tube Fitting -
Pipe Thread Size (NPT) |
|---|
| AHB-0.3 | 90 | 6.21 | 620.5 | 10 | 283 | 8 | 1/8" |
| AHB-0.75 | 90 | 6.21 | 620.5 | 10 | 283 | 8 | 1/8" |
| AHB-1 | 90 | 6.21 | 620.5 | 10 | 283 | 8 | 1/8" |
| AHB-1.5 | 90 | 6.21 | 620.5 | 10 | 283 | 8 | 1/8" |
| AHB-3 | 90 | 6.21 | 620.5 | 15 | 425 | 10 | 1/4" |
| AHB-3.3 | 90 | 6.21 | 620.5 | 15 | 425 | 10 | 1/4" |
| AHB-5 | 90 | 6.21 | 620.5 | 15 | 425 | 10 | 1/4" |
| AHB-6 | 90 | 6.21 | 620.5 | 20 | 567 | 10 | 1/4" |
| AHB-12 | 90 | 6.21 | 620.5 | 20 | 567 | 10 | 3/8" |
| AHB-24 | 90 | 6.21 | 620.5 | 20 | 567 | 10 | 3/8" |
*The air pressure to the (at the) brake will be called out at 85 to 95 PSI. This range is thought to allow a user to directly attach to a compressor line without local regulation and filtering.
Applications
Magtrol’s AHB Series Compressed-air-cooled Hysteresis Brakes can function in either torque measurement or torque control applications. When mounted to the PT 25 Series T-slot Base Plate, a cost-effective, basic motor test rig can be easily configured. For this purpose, Magtrol offers several accessories and system options to choose from. The simplest test bench may include one or two AHB Brakes and an AMF Adjustable Motor Fixture mounted onto a PT Base Plate. Adding a TM Series In-Line Torque Transducer, couplings, Free-Run Speed Sensor, 3411 Torque Display or DSP7000 Controller greatly expands the system’s motor testing capabilities.
Other accessories available from Magtrol include: power supplies, air filters, pressure gauge kits, air lines, pipe fittings, jack shafts and risers.
In addition to motor test applications, AHB Series Compressed-air-cooled Hysteresis Brakes can be used for the following:
- Durability/reliability verification
- Brush run-in
- Carburetor tuning
- High-speed tension control
System Options
Open-loop Systems
A characteristic of the open-loop system is that it does not use feedback to determine if its input has achieved the desired goal. This means that the system does not react to the output of the processes that it is controlling. An open-loop controller is often used in simple test setups because of its simplicity and low cost, especially in systems where feedback is not critical. Below is an example of an open-loop system.
Closed-loop Systems
A characteristic of the closed-loop system is that it uses feedback to determine if its input has achieved the desired goal. This means that the system reacts to the output of the processes that it is controlling. A closed-loop controller is often used because of its ability to repeatedly return to a desired controlled point. Below is an example of a closed-loop system.
