What are the characteristics of a DC motor?
DC Motor Characteristics
- Runs on DC power or AC line voltage with a rectifier.
- Operating speeds of 1,000 to 5,000 rpm.
- 60-75% efficiency rate.
- High starting torque.
- Low no-load speeds.
What is DC series motor?
Series DC motors are a group of self-excited DC motors in which the field coil is connected in series to the armature winding and thus a higher current passes through it. A series DC motor mission is to turn the electrical energy into mechanical one based on electromagnetic law.
What is DC motor slide share?
DC Motor: motor that runs on direct current (DC) electricity. 2. Principle of operation of DC Motor: When current carrying conductor is placed in a magnetic field it experience a force.
What are the distinguish characteristics of the series wound 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.
What are the types of DC motor?
There are 4 main types of DC motors:
- Permanent Magnet DC Motors. The permanent magnet motor uses a permanent magnet to create field flux.
- Series DC Motors. In a series DC motor, the field is wound with a few turns of a large wire carrying the full armature current.
- Shunt DC Motors.
- Compound DC Motors.
Why is DC motor current so high?
Answer: The starting current is high as there is no back EMF or counter EMF present in the armature circuit because atstarting counter EMF is zero. It’s armature has very less resistance due to this it need more current at starting time. Hence DC starters are used to limit the starting current ofmotor.
What are different types of DC motors?
The types of DC motor include:
- Permanent Magnet DC Motor (PMDC Motor)
- Separately Excited DC Motor.
- Self Excited DC Motor.
- Shunt Wound DC Motor.
- Series Wound DC Motor.
- Compound Wound DC Motor.
- Short shunt DC Motor.
- Long shunt DC Motor.
What is DC motor working principle?
The DC motor is the motor which converts the direct current into the mechanical work. It works on the principle of Lorentz Law, which states that “the current carrying conductor placed in a magnetic and electric field experience a force”. And that force is the Lorentz force.
What are the characteristics of a DC series motor?
The characteristic curves of a DC series motor are those curves which show relationships between the following quantities. Torque and armature current (T a/I a characteristic). Speed and armature current (N/I a characteristic) Speed and torque (N/T a characteristic) It is also known as mechanical characteristic.
How does a DC motor work in PowerPoint?
Related Presentations DC Motor- DC Motor See: DC Motor Java Applet Permanent Magnet Armature Coil Able to rotate in the magnetic field Split commutator ring Transfers current from brushes to armature| PowerPoint PPT presentation | free to view DC MOTOR SPEED CONTROL- DC MOTOR SPEED CONTROL 1.
What are the characteristics of a DC shunt motor?
20. Characteristics of DC Shunt Motor: To study the performance of the DC shunt Motor various types of characteristics are to be studied. 1. Torque Vs Armature current characteristics. 2. Speed Vs Armature current characteristics. 3. Speed Vs Torque characteristics.
What makes a d.c.motor a self-regulating machine?
makes the d.c. motor a self-regulating machine i.e., it makes the motor to draw as much armature current as is just sufficient to develop the torque required by the load. Back e.m.f. in a d.c. motor regulates the flow of armature current i.e., it automatically changes the armature current to meet the load requirement.