Skip to main content

What is the Difference Between a Synchronous Generator and an Asynchronous Generator


Synchronous generator, that is, an alternator with the same rotor speed as the rotating magnetic field of the stator. According to the structure, it can be divided into two types: a rotating armature and a rotating magnetic field.

Synchronous generators are one of the most commonly used alternators. In the modern power industry, it is widely used in hydropower, thermal power, nuclear power generation and diesel power generation.A synchronous motor that operates as a generator is one of the most commonly used alternators. In the modern power industry, it is widely used in hydropower, thermal power, nuclear power generation and diesel engine.



Electricity. Since the synchronous generator generally adopts DC excitation, when the single machine operates independently, the voltage of the generator can be conveniently adjusted by adjusting the excitation current. If it is integrated into the grid operation, the voltage is determined by the grid and cannot be changed. At this time, the result of adjusting the excitation current is to adjust the power factor and reactive power of the motor.

An asynchronous generator is an alternator that utilizes an air gap rotating magnetic field between a stator and a rotor to interact with an induced current in a rotor winding. According to the working principle, it is also called "induction generator". The speed is slightly higher than the synchronous speed. The output power increases or decreases with the slip rate. It can be excited by the power grid or self-excited with a power capacitor.

Economical efficiency

(1) The power station equipped with asynchronous generators has low investment cost due to the lack of DC excitation system and synchronous devices.

(2) Since there is no collector ring, brush, and rotor excitation winding, maintenance and operation costs are low.

(3) The asynchronous generator rotor is a rotor winding similar to the hidden pole and the non-synchronous generator. Therefore, the general efficiency is higher than that of the synchronous generator with the same capacity and the same speed. Under the same water source, the asynchronous generator can generate more power.

(4) The above economic advantages of asynchronous generators will be partially offset by the required excitation (or additional synchronous capacity or additional capacitors) of the asynchronous generator.

(5) The magnitude of the excitation required for the asynchronous generator is inversely proportional to the rated speed of the motor (ie, proportional to the number of pole pairs of the motor). The higher the speed, the lower the excitation of the target value.

(6) The area of ​​the asynchronous generator power plant is smaller than that of the synchronous generator power plant

Comments

Popular posts from this blog

What Is the Difference Between Electric Motor and Electric Generator

An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and winding currents to generate force. In certain applications, such as in regenerative braking with traction motors, electric motors can be used in reverse as generators to recover energy that might otherwise be lost as heat and friction. An electric generator operates in the reverse direction, converting mechanical energy into electrical energy. Electric generator can be divided into various type, open type, silent type, trailer type, portable type and container type, etc. Electric generator is mainly composed of diesel engine & alternator. Electric generator set is mainly composed of engine, alternator, control module, and common base. Electric generator :- Electric generator is a type of machine which converts mechanical input (energy) into electrical output (...

Engine Fault Code Messages - Volvo Penta Engine

Volvo Penta Engine Fault Code When a malfunction has occurred and the diagnostic system has generated one or more fault codes, these are read out differently depending on the equipment used. Please refer to “Fault code messages”. If the system indicates that a fault code has been set: 1 Cut engine speed to idle, or shut the Volvo engine off. 2 For DCU/DU Read the fault code from the display, please refer to Reading fault codes via the DCU or Reading fault codes via the DU. For CIU press the diagnostic button and read the fault code, by observing the flashing of the diagnostic lamp. Refer to Reading fault codes via the diagnostic lamp, CIU. 3 Look up the fault code in the Fault Code Register chapter and take the recommended measures. Reading fault codes via the DU (Display Unit) Depending on the severity of the fault the text, either WARNING! or ALARM STOP (a buzzer sounds) will be shown on the display 1 Press any button to come to the fault list. The f...

Yuchai 4D24 & 4D24T Series Diesel Engine Operation Guide

Yuchai 4D24 & 4D24T series off-highway diesel engines are developed by RAYWIN POWERTRAIN TECHNOLOGY CO., LTD. with international engine R&D institutions together. Adopted tunnel block, rotary fuel pump (mechanic or electric governor), turbocharged/naturally aspirated and 2-valve technologies, 4D24 series engines are with reliable, fuel-efficient and strong power characters. It could be applied for agriculture & garden fields, construction equipment, power generation , marine and industrial equipment. General Safety Rules Incorrect procedures, carelessness or neglect of warning instructions may cause burns, cuts, body mutilation, asphyxiation or other injury or even death. Before maintenance, please read and understand all the security measures instructions and warnings carefully. The following pages contain a general security measures to ensure personal safety that you should follow. ◆ Maintenance area should be dry, bright and well ventilation, no sund...