Determination of Gear Efficiency AT 200

Determination of Gear Efficiency

Type: AT 200
Name: Determination of Gear Efficiency

AT 200 - A product from the GUNT 2E range

Technical Description

The AT 200 unit is a complete test system with drive and brake unit and two different gears. Driving and braking power are calculated to determine the efficiencies. The components used are common in drive technology and therefore closely related to practice.
A three-phase AC motor with variable speed via frequency converter serves as the drive unit. An electromagnetic brake is used as the brake unit. The constant braking effect can be very finely adjusted via the exciting current; it then serves as a tunable load. The properties of the magnetic particle brake can be investigated in an additional experiment.
A two-stage spur gear and a worm gear are available to be studied. The characteristic properties of the gear are adapted to the performance of the motor. Flexible couplings connect the gear to the motor and the brake.
Motor and brake are mounted on pendulum bearings in order to determine the torques. The torques are measured by spring balances and lever arms. The speed of the motor is detected contact-free by means of an inductive displacement sensor on the motor shaft. The speed is displayed digitally. The exciting current of the magnetic particle brake is used as a measure of the braking torque and is also displayed.

Learning Objectives / Experiments

- determination of the mechanical efficiency of gears

by comparing the mechanical driving and braking

power for
* spur gear, two-stage
* worm gear
- plot the torque/current characteristic curve for a

magnetic particle brake
- drive and control engineering


* Mechanical efficiency of gears1
* Three-phase AC motor as the drive and magnetic

particle brake as the brake unit1
* Comparison of worm and spur gears

Available accessories

WP 300.09 -- Laboratory Trolley

[1] determination of mechanical efficiency in gears
[2] investigation on worm gear and 2-stage spur gear
[3] three-phase AC motor with variable speed via frequency converter
[4] magnetic particle brake with adjustable braking torque via exciting current
[5] inductive speed sensor on the motor
[6] display of speed and exciting current
[7] determination of torques on motor and brake via spring scales and lever arms

Technical Data

Three-phase AC motor with variable speed
- power output: 0,25kW
- speed: 0...3000min-1
Magnetic particle brake
- rated braking torque at exciting current 0...0,37A:

Two-stage spur gear
- transmission ratio: i=13,5
- torque: 23,4Nm
Worm gear
- transmission ratio: i=15
- torque: 10Nm
- worm: 2-tooth
- worm gear: 40-tooth

Measuring ranges
- speed: 0...3000min-1
- exciting current: 0...0.37A
- force: 1x0...25N, 1x0...100N

Dimensions and Weight

LxWxH: 1060x600x420mm (experimental unit)
Weight: approx. 35kg
LxWxH: 420x450x180mm (display and control unit)

Weight: approx. 10kg

Required for Operation 230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase Scope of Delivery

1 trainer
2 gears
1 spring balance

1 brake
1 drive unit
1 set of instructional material