Application Sheet

51090C

Adapting 2301A SpeedControls for Torque

Converter UseINDUSTRIAL APPLICATIONS

May be used whenever the driven load’sspeed must be constant, and the load iscoupled to the prime mover through a torqueconverter.

Typical applications of this technology maybe found in dragline operations as well ascar body or rock crushers.

FEATURES

Woodward has designed a version of ourproven 2301A Speed Control for use withdiesel engines coupled to loads throughtorque converters. To handle the torqueconverter operation, you’ll need two 2301ASpeed Controls, two magnetic pickups, andan EG-type hydroelectric actuator.

The two 2301A Speed Controls useseparate magnetic pickups, one measuringthe engine speed at the flywheel and theother measuring the tailshaft output speed.Together they can hold a load driventhrough the torque converter at constantspeed.

Although the two units are separate, theyare electrically connected in series, and theunit requesting the lowest level of fuel willcontrol the speed of the engine. As a result,you can maintain constant tailshaft speedunder load while the engine is protectedfrom excess speeds that could beencountered under extreme load conditions.

Typically, the engine governor is set to limitthe maximum allowable engine speed whilethe tailshaft governor is set at and regulatesthe desired output speed. An optional circuit

provides a minimum actuator currentadjustment that allows the engine tocontinue running when the tailshaft speedexceeds the speed setpoint for too long.This condition can exist when the tailshaftis connected to a load with highmomentum. The circuit is adjustablethrough the 1 k( potentiometer for aminimum actuator signal to allow theengine to idle.

ADVANTAGES

• Existing equipment easily adaptable

• Less expensive than most mechanicaltailshaft governors

• One part number covers mostapplication

• High-grade components

• Short lead time on deliveries

• Factory guaranteed by the leader inprime mover controls

• Worldwide sales and service support

• Easily Adapts toExisting Equipment

• InexpensiveConversion

• Complete Line ofAuxiliaryEquipmentAvailable

PO Box 15191000 East Drake RoadFort Collins CO, USA80522-1519Ph: (1)(970) 482-5811Fax: (1)(970) 498-3058www.woodward.com

Plants & SubsidiariesAustralia (New South Wales)Brazil (Campinas)China (Tianjin)Germany (Aken/Elbe)India (Haryana)Japan (Tomisato & Kobe)Netherlands (Hoofddorp &

Rotterdam)SingaporeUK (Reading, England, &

Prestwick, Scotland)US (Colorado, Illinois,

Michigan, New York, SouthCarolina, Tennessee)

Branch/Regional OfficesChina (Beijing)Czech Republic (Plzen)Germany (Tettnang)Korea (Pusan)Mexico (Mexico City)New Zealand (Christchurch)Poland (Warsaw)UAE (Abu Dhabi)UK (Dundee, Scotland)US (Alabama, California,

Illinois, Pennsylvania,Texas, Washington)

Distributors & ServiceWoodward has aninternational network ofdistributors and servicefacilities. For your nearestrepresentative call(1)(800) 835-5182 or see theWorldwide Directory on ourweb site (www.woodward.com).

CORPORATEHEADQUARTERSRockford IL, USAPh: (1)(815) 877-7441

This document is distributed forinformational purposes only. It isnot to be construed as creating orbecoming part of any WoodwardGovernor Company contractual orwarranty obligation unlessexpressly stated in a written salescontract.

© Woodward GovernorCompany, 1999All Rights Reserved

BLOCK DIAGRAM OF SPEED CONTROL APPLICATION

For more information contact:

99/8/F