Diesel Generator Tech

Alternators and regulators have been widely used in automobiles due to their simple structure, reliable operation, and convenient maintenance. When the following situations occur to the AC generator and regulator, in general, the following methods can be used for emergency maintenance of the   AC generator   and regulator. (1) When the electronic regulator or contact regulator does not match the grounding method of the AC generator and is urgently needed, the grounding method of the AC generator field winding can be changed to make the grounding method of the AC generator and regulator consistent. (2) When checking whether the AC generator generates electricity, if there is no test light or multimeter at the moment, a fuse or other fine wire from the car can be used to ground and scrape the AC generator B+terminal. If there is a spark, it can be basically confirmed that the AC generator generates electricity; If there is no response, it indicates that the AC generator is not g...

  AC alternator is an important part in diesel generator, if it has faults, whole diesel generator can not work. Some customers asked question about this last time, so Starlight Power will answer details about the common faults of AC alternator, hope this article is helpful to everyone.   A.There is abnormal voltage between alternator neutral line and ground. 1.Under normal condition, due to the influence of high-order harmonics or manufacturing process, the air gap under each magnetic pole is uneven and the magnetic potential is unequal. If the voltage is between one and several volts, there will be no danger and it is not necessary to deal with it. 2.The alternator winding has short circuit or poor insulation to the ground, which leads to the deterioration of electrical equipment and alternator performance and easy to heat up. Therefore, timely maintenance should be carried out to avoid the expansion of the accident. 3.There is no voltage between neutral line and ground unde...

What is the function of rotating rectifier of diesel generator set?   Rotating rectifier is a device which rotates coaxially with AC exciter. Its main function is to convert the three-phase AC excitation current output by the armature of the AC exciter into the DC current through the diode on the rectifier, supply the rotor winding as the power supply for the excitation current. It is because of the application of rotating rectifier that the AC synchronous generator gets rid of the binding of brush, no longer has the trouble of frequent maintenance and replacement of parts, and also makes the application of the AC synchronous generator more extensive. Some rotating rectifiers of AC synchronous generators are installed on the outside of the AC exciter and fixed on the shaft with screws for easy installation and maintenance. Some rotating rectifiers of generators are installed on the inner side of the rear end cover and directly fixed on the bolts protruding from the armature...

What is a Generator? A generator is a machine that converts available mechanical energy into electrical energy. It works on the principle of Faraday’s Law of Electromagnetic Induction. Based on the output obtained, we classify generators as:   AC Generators or Alternators AC generator, also known as alternators, is a machine that converts mechanical energy into electrical energy. The generated electrical energy is in the form of an alternating current sinusoidal output waveform. The mechanical energy is usually supplied by steam turbines, gas turbines and combustion engines.   AC generators work on the principle of Faraday’s law of electromagnetic induction which states that electromotive force -EMF or voltage – is generated in a current carrying conductor that cuts a uniform magnetic field. This can either be achieved by rotating a conducting coil in a static magnetic field, or by rotating the magnetic field that contains the stationary conductor. The preferred a...

1. The generator does not operate according to the specified technical conditions. For example, if the stator voltage is too high, the iron loss increases; if the load current is too large, the stator winding copper loss increases. If the frequency is too low, the cooling fan speed will be slowed down, which will affect the heat dissipation of the generator. If the power factor is too low, the rotor excitation current will increase and the rotor will heat up. Check that the indication of the monitoring instrument is normal. If it is abnormal, necessary adjustment and treatment shall be carried out to make the generator run in accordance with the specified technical conditions. 2. The three-phase load current of the generator is unbalanced, and the overloaded one-phase winding will overheat; if the difference between the three-phase current exceeds 10% of the rated current, it is a serious phase current imbalance, and the three-phase current imbalance will generate a negativ...

The structure of the brushless AC synchronous generator is divided into two parts, a stationary part and a rotating part. The stationary part is called a stator, and includes a base, a stator core, a stator winding, an end cover, a bearing cover, and a stator of an AC exciter. Stator It consists of a base, a stator core and a stator winding. The stator core and the stator winding are part of the induced potential and current, which is also called the armature. 1. Base: The overall support of the generator, used to fix the armature and the front and rear end caps together to support the rotor. There are generally outlet boxes on the base, located on the upper part of the base, and only on the right side (from the extended end of the shaft). A wiring board is installed in the outlet box to draw an alternating current or the like. 2. Stator core: part of the stator iron core generator magnetic circuit. In order to reduce the eddy current loss, the core is formed by lam...

Inspection of  Starlight AC synchronous generator a. Though the generator, AVR and auxiliary devices are solid and well insulated, if the generator was stored for longtime it might be moistened, and should be inspected carefully before operation. b. Measure the insulating resistance, of winding against the ground by ohmmeter, if the value is less than 2 in cold condition, the generator should be dried. Caution: At measuring, the electronic elements and capacitor should be shorted, and the AVR. should be disconnected to avoid damaged. c. Make sure all connecting joints are tight and contact good. d. Be sure the frame is properly grounded, and ground wire should be same as the size of lead-wires 。 e. Make familiar with the rated data of nameplate before operation. 2. Voltage adjustment In general, the generator was carefully inspected and tested in operation before it left the factory, and the normal voltage has been corrected, so it is not necessary to adjust. I...

Before learning the difference between AC and DC genset, first we should know about what is genset. G enset is mainly composed of engine and generator. Most commercial machines and equipment is AC genset. However, commercial DC gensets are commonly founded in electromagnetic applications. Some are used in Traction applications like subways and trains. Some DC motor-generator sets provide the field currents for large commercial power Alternators/ AC generators as in hydro-electric dams.  Generator working principle: Generator works by moving electrical conductors through a magnetic field. If your generator doesn’t have magnets, it won’t produce electricity. The magnetic field is created by taking some of the generator output voltage and converting it to DC and feeding it to a coil to make an electro magnet. In other words,   the process of converting energy is performed by electromagnetic induction. There are also two types of generators and these produce currents that d...