Transaxle Test Rigs

Test Benches for Endurance Testing of Transaxles

Transaxle Test Benches perform endurance testing of trans-axles at variable speeds and variable loads with emphasis on conservation of power and reduction in installed power.

Conventionally the trans-axle is driven from an electric motor using a loading device for exerting braking torque on the test unit. The testing power drawn is absorbed in the loading device, and dissipated into heat. In the regenerative system the braking energy is regenerated back into the mains, and power is consumed only for overcoming frictional and conversion losses.

By the use of Di-vector technology, the same full-load test conditions of the transmission element can be achieved from a power source just adequate to keep the test bench running under no-load. This condition demands little power to overcome the frictional and mechanical imperfections in the machine.

Dynaspede’s proprietary Di-Vector technology is a step ahead of the popular 4 square method of testing for power transmission components. This technology, (presently under patent formalities) was developed and field-tested by Dynaspede as an energy efficient alternative for full load testing of power transmitting components operating under varying load profiles and duty cycles. This concept provides the driving power, self-generated within a synchronously driven mechanical loop, without the need for additional power except to overcome static losses in the system..

Test Set-up

Mounting Structure: The mounting structure is a self-supporting, floor-mounted bed designed for low vibrations to accommodate the test transmission units, driving system, torquing system and the transducers.

The transmission assemblies are flange mounted on to the test bed by means of interchangeable adapter plates. The sprockets are fastened to the wheel shaft ends of transmission assembly and transmission chains are used to connect the sprockets, thus completing the mechanical loop.

Drive Arrangement: The drive arrangement comprises a suitably rated AC induction motor speed-controlled by an adjustable speed, microprocessor based digital AC drive.

Loading Arrangement: The torque is infinitely and electronically controlled by a torquing device. The torquing device, capable of introducing the desired system torque, is essentially a combination of heli-planetary form of transmission and a motorized torque source. When such a torquer is introduced in the path of closed loop and synchronously driven mechanical loop, the system torque can be remote controlled both under static and dynamic conditions. Thus the system velocity and torque can be vectorially controlled by conventional automatic feed back control techniques.

Torque Monitoring: A high accuracy In-line brushless rotating torque transducer monitors the load torque both under static and dynamic conditions and for feed back.

Speed Monitoring: Dynaspede AC tachogenerator is used to monitor the speed and for feed back purpose.

Control System: A PC-based control system serves all the control needs of the Test Bench. The PC console houses all digital controls and peripherals such as the PLC, PC, colour monitor, keyboard and the track ball. The system automatically sequence the various tests according to a prescribed program and stores the results in tabular and graphic form.

Test Bench for Endurance Testing of Transaxles Based on Di-Vector Technology

Transaxle Test Rigs
Transaxle Test Rigs
Transaxle Test Rigs
Transaxle Test Rigs