Catalogs >
MAGTROL >
BHB Series | Blower Cooled Hysteresis Brake

BHB Series | Blower Cooled Hysteresis Brake
8Pages

Catalog excerpts

BHB Series | Blower Cooled Hysteresis Brake - 1

BLOWER COOLED HYSTERESIS BRAKES FEATURES ▪ Ideal for low-torque/high-speed applications with exceptional power ratings ▪ Torque: 3 N·m to 24 N·m ▪ Speed: up to 20,000 rpm ▪ Power: up to 7000 W ▪ Included blowers eliminate the need for additional air supply equipment ▪ Includes air deflectors to guide exhaust air away from the motor under test ▪ Magtrol hysteresis braking technology provides precise torque control independent of shaft speed ▪ EMC susceptibility conforms to European standards ▪ All metric dimensioning ▪ Base mounting standard ▪ Designed for use with Magtrol’s PT Series T-slot Base Plate mounting system ▪ A variety of accessories and system options to choose from to create a simple and cost-effective test system. DESCRIPTION When torque control/torque measurement must be performed at the highest possible power, Magtrol BHB Series Hysteresis Brakes are ideal. This design allows for continuous power ratings up to 6000 watts (7000 watts intermittent). Use of pre-loaded bearings in the BHB Series Hysteresis Brakes allows operation at speeds of up to 20,000 rpm for extended durations. BHB Brakes are conveniently base mounted. Base mounting, with integral barrier type terminal strip, provides easy mounting and wiring. Fig.1 : BHB-6 Blower Cooled Hysteresis Brake APPLICATIONS Magtrol’s BHB Series Blower Cooled Hysteresis Brakes can function in either torque measurement or torque control applications. When mounted to a PT 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 BHB Brakes and an AMF Adjustable Motor Fixture mounted onto a PT Base Plate. Adding a TM Series In-Line Torque Transducer, couplings, FRS 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, pipe fittings, jack shafts and risers. In addition to motor test applications, BHB Series Blower Cooled Hysteresis Brakes can be used for the following: ▪ Durability/reliability verification ▪ Brush run-in ▪ Carburetor tuning ▪ High-speed tension control © 2023 MAGTROL | Due to continual product development, Magtrol reserves the right to modify specifications without forewarning.

Open the catalog to page 1

BHB Series | Blower Cooled Hysteresis Brake - 2

BHB SERIES SYSTEM CONFIGURATIONS BHB Series Hysteresis Brakes are versatile enough to be specified for use in simple open-loop systems or more complex closedloop systems. 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 the catalog to page 2

BHB Series | Blower Cooled Hysteresis Brake - 3

H MAGTROLPRINCIPLES OF HYSTERESIS OVERVIEW The hysteresis effect in magnetism is applied to torque control by the use of two basic components -a reticulated pole structure and a specialty steel rotor/shaft assembly-fastened together but not in physical contact. Until the field coil is energized, the drag cup can spin freely on the ball bearings. When a magnetizing force from either a field coil or magnet is applied to the pole structure, the air gap becomes a flux field. The rotor is rotor — magnetically restrained, <Dra9 Cup) providing a braking action between the pole structure hub and...

Open the catalog to page 3

BHB Series | Blower Cooled Hysteresis Brake - 4

Open the catalog to page 4

BHB Series | Blower Cooled Hysteresis Brake - 5

BHB SERIES POWER ABSORPTION CURVES BHB-3B / BHB-3BA The power absorption curves represent the maximum power (heat) that the brake can dissipate over time. Maximum Kinetic Power Rating Curve for Less Than Five Minutes: Area under curve equals the maximum speed and torque combinations for a motor test of less than five minutes. Maximum Kinetic Power Rating Curve for Continuous Duty: Area under curve equals the maximum speed and torque combinations for a continuous duty motor test. © 2023 MAGTROL | Due to continual product development, Magtrol reserves the right to modify specifications...

Open the catalog to page 5

BHB Series | Blower Cooled Hysteresis Brake - 6

H MAGTROL DIMENSIONS BHB DIMENSIONS (MILLIMETERS) BHB BRAKE MODEL © 2023 MAGTROL I Due to continual product development, Magtrol reserves the right to modify specifications without forewarning. DATASHEET www.magtrol.com

Open the catalog to page 6

BHB Series | Blower Cooled Hysteresis Brake - 7

BHB SERIES SYSTEM OPTIONS AND ACCESSORIES PT SERIES T-SLOT BASE PLATES FRS FREE RUN SPEED SENSOR Magtrol’s PT Series Base Plates are used for creating a basic test rig by mounting a brake and/or TM Torque Transducer in line with the unit to be tested. Its solid, warp-resistant structure and multiple, single-sided T-slots enable modular construction that is costeffective and easy to assemble. Magtrol’s FRS Free-Run Speed Sensor is designed for applications where it is necessary to acquire speed readings that are unaffected by drag load. Before connecting a motor to the dynamometer, the...

Open the catalog to page 7

BHB Series | Blower Cooled Hysteresis Brake - 8

H MAGTROLORDERING INFORMATION SYSTEM OPTIONS CATEGORY DESCRIPTION MODEL/PART # © 2023 MAGTROL | Due to continual product development, Magtrol reserves the right to modify specifications without forewarning. DATASHEET www.magtrol.com MAGTROL INC 70 Gardenville Parkway Buffalo NY 14224 | USA MAGTROL SA Route de Montena 77 1728 Rossens | Switzerland Worldwide Distribution Network BHB SERIES HYSTERESIS BRAKES - US 01/2023

Open the catalog to page 8