As described before there are three types of selfexcited dc generators they are 1 series 2 shunt and 3 compound a. There are five major types of dc generators, classified according to the. Let, i ia isc i l here, ia armature current isc series field. Dc generators are classified based on how their fields are excited i. As described before there are three types of selfexcited dc. A dc generator is an electrical device used for generating electrical energy.
Types of dc generator dc machines basic electrical engineering first year engineering duration. In permanent magnet dc machines, a permanent magnet is used to establish flux in the magnetic circuit. C generators are classified according to the way in which a magnetic field is developed in the stator of the machine. An electrical dc machine can convert mechanical energy into direct current electricity. The selfexcited dc generators are further classified as shunt wound dc generators. Explain the effect of motor reaction in a dc generator. The magnetic flux in a dc machine is produced by the field coils carrying current. These generators are not found in industrial applications because of the low power generated from it. Types of dc generator separately excited and self excited the dc generator converts the electrical power into electrical power.
The synchronous electrical generator also called alternator belongs to the family of electric rotating machines. Here to download the pdf of this topic types of dc generators. Therefore, the same current flows through armature winding, field winding and the load. Types of dc generators diagrams included electrical4u. A fourpole generator, having lapwound armature winding has 51 slot, each slot containing 20 conductors. These are generators in which the field winding is excited by the output of the generator itself. There are several types of mechanical energy sources available such as hand cranks, internal combustion. Self excited dc generators field coils excited by the generator. A simple explanation of the different types of dc generators. Types of dc generatorsseriesshuntcompound circuitstoday. C generators may be classified as i separately excited generator, ii shunt generator, and iii series generator and. Separately excited dc generators are rarely used in practice.
Types of dc generatorseparately excited and self excited circuit. Categories dc generator, interview questions, objective questions 1. Thus, there are three basic classification dc generators 1 permanentmagnet field 2 separatelyexcited field and 3 selfexcited field. Other members of the family are the directcurrent dc motor or generator, the induction motor or generator, and a number of derivatives of all these three. The circulating current in the field windings produces a magnetic flux, and the phenomenon is known as excitation. There are three methods of excitation, and thus three main types of dc generators permanent magnet dc generators field coils excited by permanent magnets. A dc generator is an electrical machine which converts mechanical energy into direct current electricity. Types of dc generators series generator, shunt generator.
This energy conversion is based on the principle of production of dynamically induced emf. Learn about series, shunt, compound, selfexcited, and permanent magnet. The initial electromagnetic generator faraday disk was invented by british scientist namely michael faraday in the year 1831. Types of dc generatorseparately excited and self excited. This article outlines basic construction and working of a dc generator. The main function of this device is to change mechanical energy into electrical energy. A shunt generator delivers 450 a at 230 v and the resistance of the shunt field and armature are 50.
188 978 191 254 1085 1182 518 77 391 287 92 926 765 1040 1530 51 444 163 827 69 543 1066 79 892 217 1234 1160 1001 1130 398 1289 1435 1369 1490