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How to Work with the Speed Controller of the Diesel Generator Set

Jan. 18, 2019

In order to make users know more about the speed controller of diesel generator set, this paper introduces the working principle and wiring diagram of the speed controller.

 


How to Work with the Speed Controller of the Diesel Generator Set.jpg



Basic Electrical characteristics of rotational Speed Controller

 

Power supply voltage: DC24V (range 16V-32V)

Power consumption: <0.1A (excluding actuators)

Speed fluctuation rate: ≤ 0 0 25%

Steady-state rate: 0~ 5% adjustable

Ambient temperature: -40°C~+85°C

Ambient humidity: < 950%

 

Rotational speed controller shape and mounting dimensions

 

The rotational speed controller is installed on the control box or other peripheral equipment of the motor. When installing, the air should be dryly installed and the temperature is suitable. If it is used in the place with high water and moisture density, the controller should be installed vertically.



Rotational speed controller shape and mounting dimensions.jpg


 Rotational speed controller wiring diagram.jpg




1, 2 end connected to the actuator

 

3, 4 terminal connected speed sensor, speed sensor must use shielded cable, the shield part of the cable should be connected to terminal 4, but can not be connected with other parts, otherwise the interference signal may enter the speed controller;

 

5, 6 terminals connected to DC 24V (special order i2V) power supply, can use the diesel control battery, start battery or other stable and unregulated power supply, but to ensure the system's peak power consumption and voltage fluctuation range requirements. When using a starter battery, a charging device must be provided to ensure that the battery is fully charged. When the diesel engine is started, the short-term output voltage drop of the battery will not affect the normal operation of the governor.

 

Speed controller positive power supply (6 feet) through the power switch (or stop switch). Fuse can be connected directly to the positive electrode of 24 V battery if necessary, that is, directly from the positive electrode of the battery. The negative power supply end (5 feet) of the rotational speed controller must be direct lead from the negative electrode of the battery. If the negative electrode of the power supply needs to be grounded, the negative electrode of the power supply is connected to the earth at the negative pole of the battery, and the earth cannot be terminated from the negative electrode (5 feet) of the controller. If the length of power line is less than 10 meters, the selection of power cord should be greater than 0.75 square millimeter; if it is more than 10 meters, the power line should be thickened correspondingly.

 

The correct power wiring and incorrect wiring diagrams are as follows:


The correct power wiring and incorrect wiring diagrams.jpg


 

The 7/9 terminal is connected to the potentiometer with a resistive value of 3.3K, and the genset speed range can reach 150 r/m.

 

The 10/11 terminal is connected to the steady-state rate-adjusting switch and disconnects the steady-state rate-adjusting rate of 0. By adjusting the steady-state rate-adjusting potentiometer on the controller after closing, the steady-state adjustable rate can be set in the range of 0-5% (this switch is not provided when ordering, If the user needs to run side by side, you can use a wire to connect the 10/11 terminal short);

 

The 7/12 terminal is connected with high/low speed switch, and when closed, it is a suffering speed and rises to high speed after disconnecting;

 

13 terminal connected with voltage regulator, can be directly connected to synchronous controller and load distributor to complete automatic well car and automatic load distribution function, single machine operation can not be connected.

 

Terminal 14 external supply 10V/20mA power, but in use such as short-circuit or overload use will damage the controller.

 

Why is Electronic Speed Regulation Diesel Generator set so popular

 

With more and more strict control of diesel generator exhaust pollution, diesel engine fuel injection system put forward higher requirements. At present, the market is generally electronic speed-adjusted diesel generator sets. Electronic speed-adjusted diesel generator sets, its oil transport will vary with the size of the load. When the load becomes smaller, the fuel transport of the generator will also become smaller, and the fuel consumption of the diesel generator will decrease, and when the load output becomes larger, the fuel consumption of the diesel generator will also increase. In addition, the stability of the diesel generator set with electronic speed regulation is better if the automatic conversion function is added.

 

In general, even the same power, the same model, the same configuration of diesel generator sets, but if one is electronic speed regulation and a mechanical speed governing unit prices are also very different. The difference between electronic speed regulation and mechanical speed regulation is as follows: the mechanical speed regulation of a generator set, after it is started well, the general throttle needs to be fixed, so that, regardless of the change in the load output of the generator set, the amount of oil it carries is still the same. Never change. And the electric speed-adjusted generator, its quantity of oil will vary with the size of the load.

 

When the load becomes smaller, the oil transport of diesel generator sets will also become smaller, in which case, the fuel consumption of diesel generating units will be reduced, and when the load output becomes larger, the fuel consumption of diesel generating units will also increase. In addition, the stability of the diesel generator set with electronic speed regulation is better if the automatic conversion function is added.

 


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