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· Series wound DC motor is a self-excited DC motor that converts electrical power into mechanical power based on electromechanical law. But in this motor, the field winding is connected in series to the armature winding. In this motor, we have a large amount of starting torque, so it’s the best with (applications of DC series motor):

Components used in DC Series Motor The components of this motor mainly include the rotor (the armature), commutator, stator, axle, field windings, and brushes. The fixed component of the motor is the stator, and it is built with two otherwise more electromagnet pole parts.

Construction of Series DC MotorVoltage and Current Equation of Series DC MotorSpeed and Torque of Series DC MotorSpeed Regulation of Series Wound DC MotorSeries Wound DC Motor - Top Electrical Engineers

· Series DC motors are a tough one. They need a high momentum and torque for working. A high huge torque can help in traction process. The resistors of DC series motor is placed in series that is when a high torque is applied to tackle that resistance, the process of traction gets easier.

3/23/2007 ELEC A6 DC Machine 34 Example 3 Q1) A DC series motor is operated at full load from a 240 V supply at a speed of 600 rpm. The EC is found to be 217.2 V at a line current of 38 A, find: a) The armature resistance assuming the series field resistance is 0.2 Ω.

· A dc motor is a dynamic machine, hence there is a frictional loss in the bearings. For the same reason, there is a windage loss in the air gap between the rotor and stator. Both frictional and windage losses are mechanical losses. Losses of DC Motor

· Ans 3. Series Motor. Explanation: At the time of starting, flux is very less in DC series motor. So as we know the inverse relationship between speed and flux i.e flux decrease when speed increase. Therefore we never start DC series motor at no load.

· Therefore if the DC Series Motor is started at No Load then the speed of DC Series Motor will become dangerously high which will definitely damage the DC Series Motor. In view of this, DC Series Motor shall always be started and operated under load mechanically coupled with it. If any query, please write in comment box.

· Let V = Supply voltage I1 = Current taken by motor I2 = Load current V2 = Terminal p.d. of generator Ra, Rse = Armature and series field resistance of each machine Power taken from supply = VI1 Output obtained from generator = V2 I2 Total losses in both the machines, WT = VI1 - V2 I2 Armature copper and field losses, WCU = ( Ra + 2 Rse ) I12 .

· Series DC motor. In a series DC motor the field is connected in series with the armature.The field is wound with a few turns of large wire because it must carry the full armature current. A characteristic of series motors is the motor develops a large amount of starting torque. However, speed varies widely between no load and full load.

The series field winding carries the armature current, and the armature current is large, that is why series field winding consists of few turns of wire of large cross-sectional area. Figure: (a) D.C. series generator (b) D.C. series motor. 4. Compound wound D.C. machine: A Compound machine is a machine which has both shunt and series fields.

· Let’s move on to induction motor drives. A forerunner of the 3-phase induction motor was invented by Nikola Tesla sometime before 1889. Curiously, the stators for the 3-phase induction motor and the DC brushless motor are virtually identical. Both have three sets of “distributed windings” that are inserted within the stator core.

· Therefore if the DC Series Motor is started at No Load then the speed of DC Series Motor will become dangerously high which will definitely damage the DC Series Motor. In view of this, DC Series Motor shall always be started and operated under load mechanically coupled with it. If any query, please write in comment box.

· Ans 3. Series Motor. Explanation: At the time of starting, flux is very less in DC series motor. So as we know the inverse relationship between speed and flux i.e flux decrease when speed increase. Therefore we never start DC series motor at no load.

· Before discussing the speed control of dc motor, let us first establish the expression of the speed of a dc motor.The voltage equation of a DC motor is Where E b is the back EMF, V is the supply voltage, I a the armature current, and R a is the armature resistance.. Again, the expression of back EMF in a DC motor is Where φ is the field magnetic flux, N is RPM of the motor, Z is the …

The small blower motor is an induction machine that runs continuously, thereby allowing the main motor to maintain full torque at low speed without overheating. (Photo courtesy of Control Techniques) The main power circuit consists of a six-thyristor bridge circuit (as discussed in Chapter 2), which rectifies the incoming a.c. supply to produce .

There are several tests that are conducted for testing a dc machine (generator or motor) to judge its performance. The most important performance tests to be conducted on the dc machine are: The magnetization or open-circuit test. The load characteristic. The determination of the efficiency curve. The temperature rise test.

At an elevated motor temperature, the slope of the DC motor curve increases as a result of an increase in no-load speed and a decrease in locked rotor torque (sometimes referred to as stall torque). Figure 3 illustrates the total area beneath a particular motor curve that can be considered the range of consistent performance between room .

This picture is from a washing machine motor indesit repurposed in a dc operated motor by watching the original connection we will find that is got 8 pins starting with the tacho coil 8+7 that i showed previously we will not use in this configuration.Moving down 6 is not connected 5+4+3 are the stator connection wich loochs like a single coil with 2 connection and another aditional center tap .

DC Series Motors Operated on AC Power. The field winding of a dc series motor has fewer turns and larger wire than the field winding of the dc shunt motor. Therefore, its inductive reactance is less. The strength of the magnetic field is about the same as when the motor runs on dc power. The field winding and the armature winding are connected .

To start a dc series motor, mechanical load is first put and then the motor is started. Since on no load the series motor attains dangerously high speed, which causes heavy centrifugal force resulting in the damage of machine, series motors are not suitable for the …

2. Modeling of DC Motor The most common device used as an actuator in mechanical control is the DC motor. For example, the control of a rotary inverted pendulum requires a DC motor to drive the arm and the pendulum as shown in Figure 2-1. The system structure of a DC motor …

· Answer 2. Series motor . Explanation: In DC series motor both field and armature windings carry the same current from source as both are connected in series. Therefore torque is directly proportional to the product of current in field and armature windings. For a given source current the torque produced is square of this current.