Why is speed control of a generator important?
2023-05-15
Diesel-generator governor is sometimes referred to as the speed controller of a diesel engine. Diesel engines must maintain a predetermined
speed to maintain generator output specifications. If the engine speed is not correct, the generator will not maintain the required output specifications.
Governors can be divided into two basic groups:
Governors can be divided into two basic groups:
• Mechanical/Electrical Control – Older generator sets utilize these control systems. Fuel system is controlled by mechanical governor.
• Electronic Control – Newer generator sets use an electronic control system. This system interfaces and controls engine and generator
• Electronic Control – Newer generator sets use an electronic control system. This system interfaces and controls engine and generator
control functions to provide a constant, reliable power source.
Mechanical/Electrical Control
Mechanical/Electrical Control systems were the first control systems introduced by generator manufacturers. This interfaced mechanical engine
control functions with generator electrical load needs. Many generator control systems are available, all operate under the same design principles.
A Control System is featured below:
• Governor – Engine speed is mechanically controlled by centrifugal governor. Governor receives analog input signals from controller.
• Speed Sensor – Magnetic sensor that supplies information to the controller.
• 2301A Controller – Receives signals from speed sensor and transmits signals to governor and external customer supplied switch boards.
• Speed Sensor – Magnetic sensor that supplies information to the controller.
• 2301A Controller – Receives signals from speed sensor and transmits signals to governor and external customer supplied switch boards.
This control system is considered to be an analog control system. The system setup is accomplished by using adjustment screws that rotate in a specific direction.
The system provides control of multiple generators. The generator supplies power to the switchboard control system that powers the device.
Additional hardware installation can allow remote communication and operation of emergency power control systems.
Generator design and creation progressed with the advent of digital technology. To illustrate the interface between the engine, generator(s) interface control,
this section is divided into the following areas:
• Analog and Digital Signal – Basic concept used when introducing a generator set that has an engine equipped with an engine ECM (Electronic Control Module),
but does not have an internal control system.
• ECM – Define interface between ECM and engine functions for generator sets that are not equipped with advanced generator controls.
• Engine and Generator Interface Controls – Introduces integrated software package for engine and generator controls.
• ECM – Define interface between ECM and engine functions for generator sets that are not equipped with advanced generator controls.
• Engine and Generator Interface Controls – Introduces integrated software package for engine and generator controls.
Analog and Digital Signal
It is important to understand the difference between analog and digital signals when updating an older analog configuration to the newer digital control configuration:
It is important to understand the difference between analog and digital signals when updating an older analog configuration to the newer digital control configuration:
• Analog Signal – Signal is defined as a sine wave. This signal is measurable and controllable through the complete cycle of high and low peaks. Specific adjusting
screws allow individual system adjustments.
• Digital Signal – Signal is defined as a square wave. Inputs and Outputs from controller are in two states:
• Digital Signal – Signal is defined as a square wave. Inputs and Outputs from controller are in two states:
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OFF – 0 to 2.5 VDC
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ON – 2.6 to 5.0 VDC
If equipment requirements specify the need to connect analog signals to digital signals. Inverters can be installed to convert digital signals to analog signals.
Converters can be installed to convert analog signals to digital signals.
What is generator actuator ?
What is the function of the controller on a generator?
