There are 4 main types of DC motors: 1. Permanent Magnet DC Motors The permanent magnet motor uses a permanent magnet to create field flux. This type of DC motor provides great starting torque and has good speed regulation, but torque is limited so they are typically found on low horsepower applications. 2. Series DC Motors These types of direct connection motors are, for instance, used in the traction system, cranes, air compressors, vacuum cleaners, sewing machines, etc. Shunt DC motors are used for applications where you need constant speed, and the starting conditions are not severe. The shunt direct connection motors applications are in lathe machines Compound (Wound stator). Let's see the basics of each type as well as their advantages and disadvantages. 1. Permanent Magnet Motors. Permanent Magnet Motor. The permanent magnet motor uses a magnet to supply field flux. Permanent magnet DC motors have excellent starting torque capability with good speed regulation. Applications of DC Machines. In the present day world, electrical energy is generated in bulk in the form of an alternating current. Hence, the use of DC machines, i.e., DC generators and motors are very limited. They are mainly used in supplying excitation of small and medium-range alternators. The Industrial Applications of DC Machines are in Subject - Basic Electrical EngineeringVideo Name - Types of DC GeneratorChapter - DC MachinesFaculty - Hemant JadhavWatch the video lecture on the Topic Type Lecture Notes Elements of Electrical Machines 6 1.1 Practical DC generator construction Fig. 1.2 Cut-away view of dc practical generators The actual DC generator consists of the following essential parts: Magnetic frame or Yoke Pole Cores and Pole Shoes Pole Coils or Field Coils Armature Core Armature Windings or Conductors Types of DC Motors • Separately Excited Motor • Shunt Excited Motor • Series Excited Motor • Compound Excited Motor • Permanent Magnet (PM) Motor Equivalent Circuit of a DC Machine (separately excited) E A=kΦω τ ind =kΦI A Equivalent Circuit of Shunt-Excited DC machine E A =kΦω τ ind =kΦI A E A =kΦω ind T A k R k V ωτ ( Φ)2 − Φ Working and Operating Principle of DC Motor A DC motor in simple words is a device that converts direct current (electrical energy) into mechanical energy. It's of vital importance for the industry today, and is equally important for engineers to look into the working principle of DC motor in details that has been discussed in DC field winding, and one each from the three stationary AC phase windings. 6.The three magnetic fields from the armature windings will each produce flux densities, and the composition of these three flux densities result in a single rotating magnetic field in the air gap. PDF created with pdfFactory trial version pdffactory.com There are three general types of field connections - SERIES-WOUND, SHUNT-WOUND (parallel), and COMPOUND-WOUND. Compound-wound generators are further classified as cumulative-compound and differential-compound. DC Machines EO 1.4 STATE the purpose of each of the following components of a DC machine: a. Armature b. Rotor c. Stator d. Field Armature The purpose of the armature is to provide the energy conversion in a DC machine (refer to Figure 2). In a DC generator, the armature is rotated by an external mechanical force, such as a steam turbine. This rotation EO 1.4 STATE the purpose of each of the following components of a DC machine: a. Armature b. Rotor c. Stator d. Field Armature The purpose of the armature is to provid