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Analog Controls


Woodward has provided customers with high-quality analog controllers for over a quarter century with the 2301A and EPG speed control product lines. Woodward has demonstrated long-term customer commitment and loyalty by providing technical support and continuous improvements for these controls.

While these analog controls are still available for field replacement, you might wish to consider the benefits of digital controls for your applications. Check out Woodward’s latest engine control technologies, including the 2301D, APECS, and APECS DPG product lines.

Woodward Analog Controllers

2301A Speed Control2301A Speed Control
The 2301A Speed Control controls the speed or load of diesel or gas engines, or steam or gas turbines. The unit provides control in the isochronous mode, with droop available through an externally wired potentiometer. The isochronous mode is used for constant speed of the controlled prime mover as long as it is able to provide power to satisfy the load. The 2301A LSSC (Load Sharing and Speed Controls) are designed for use in electric generator systems where multi-unit load sharing is desired. 2301A controls may be used with diesel, gas or gasoline engines, or steam or gas turbines.
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82686_D PIC

Load Sharing Module
The Load Sharing Module (LSM) provides isochronous and droop load-sharing  capability for engines in generator set applications. Additional equipment in the control system can include the Woodward SPM-A Synchronizer, SPM-D Synchronizer, Automatic Generator Loading Control (AGLC), and Automatic Power Transfer and Loading Control (APTL).
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82384_U PIC

SPM-A Synchronizer
The SPM-A Synchronizer (SPMA) biases the speed of an off-line generator set so that the frequency and phase match those of another generator or the utility bus. Then it automatically issues a contact closure signal to close the circuit breaker between the two when frequency and phase are matched within limits for a specified match-up time.
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82399_A PIC

Automatic Generator Loading Control
The Automatic Generator Loading Control (AGLC) is for use with Woodward load sharing and speed control systems with either built-in or external load sensors. It is designed to provide soft loading or unloading of a generator set into or out of a load sharing system at controlled rates. It can also soft load or unload a single unit, or up to 15 paralleled load sharing units, into or out of parallel with a utility, and then set a specific base load on the generating system.
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EPG GovernorsEPG Governing Systems
Electrically Powered Governor (EPG) systems are designed for precise speed control of diesel, gas, gasoline engines, and gas turbines. They are especially suited to prime movers without a mechanical drive or hydraulic oil supply for the governor and which have low-mass, low-friction fuel linkages.
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