DC Electromotor

Although the use of this type of electromotor is limited, it is still used in the industry because of the good controllability advantage of this electromotor. The characteristic of a direct current electromotor is its diversity, which can be achieved by various combinations in their excitation circuit to obtain various farmer-characteristics. Because of their ease of control, direct current electromotors are therefore used in systems that require high speed control over a wide range of farms.


Electromotor Karma


Nostop Electromotor

Although the use of this type of electromotor is limited, it is still used in the industry due to the good controllability of this electromotor. The characteristic of a direct current electromotor is its diversity, which can be achieved by various combinations in their excitation circuit, to obtain various farm and round characteristics. Because of their ease of control, direct current motors are therefore used in systems that require speed control over a wide range of farms.

In DC machines, there is a rectifier that integrates the DC motor torque and the DC generator voltage, which is called the commutator mechanism. This will cause more wear and tear on these electric motors and require more maintenance.

The position of DC machines With the changes in the electronics arena, power has been gradually lost to its competitors in the field of torque control. But until a few years ago, DC motors dominated automation and industrial automation. The simple and well-understood mathematical model of DC machines helps control systems to be well developed and is a prelude to the discussion of induction and synchronous motors. And, of course, it is worth noting that there are still plenty of DC motors in various factories. Therefore, studying and studying these types of machines is very useful and provides a deep insight into the understanding of advanced control techniques.

The components of DC electric motors are as follows:

Simply put, a DC electromotor comes from a fixed magnet called a stator and armature, which is illuminated by windings around an iron core (to concentrate the magnetic field). The coils are generally wrapped around the core axis several times, and large motors can accommodate large parallel currents. As the armature rotates the external power supplies, different parts are stimulated by passing the brush. The total amount of current being sent to the coils, the size and number of coils can determine the amount of power the electromagnetic field produces.



Industrial question

Frequently Asked Questions

What are the components of a DC electric motor?

A: A classic DC electric motor has components such as alternator armature, rotary switch and magnet. The armature in this DC electromotor is made of ferrous magnet. The DC switch in the DC motor, called the commutator, reverses the direction of the current in each cycle twice so that the magnets created in the armature can absorb the magnets outside the armature and then repel them. .

What is the speed and power of a DC motor?

A: Generally speaking, the speed of a DC alternator depends on the input voltage and its power output.

Where is the DC motor used?

A: The DC motor has many uses due to the use of direct power. For example, you can work with windshield lifts, all kinds of hair dryers, control machines and kids' play machines, powered sports equipment such as treadmills, voice recorders and many robots with DC motors. .

What Factors Depend on the Speed ​​of a DC Electromotor?

A: There are several factors that affect the speed of a DC alternator, such as: the voltage and current that pass through the coils of the electromotor and the charge on the electromotor.

How is the speed control on a DC motor?

A: The speed of this type of electromotor can be controlled by variable voltage or current passing by using a coil winding switch in the motor winding or by having a variable voltage source.

What is the reason for using DC DC motor in locomotive?

A: In order for the alternator to be suitable for use in high-tensile tasks such as locomotives, the motor needs to have a high torque at low speeds, which can be seen in the DC motor.

What are the limitations of a DC electromotor?

A: You need a graphic brush to connect to a commutator in a DC electromotor, which creates the most limitations on this type of electromotor. When the brush and commutator blend together, they create friction and generate noise in the alternator. The higher the speed of electromotor rotation, the stronger the brush should be pressed to ensure a good connection. The friction caused by the wear of the brush and the commutator does not only result in noise generation, which may result in the brush being lost and need to be replaced. If the connection between the commutator and the brush is not tight, the connection will produce incomplete electrical noise in the circuit.

What solution do you offer to overcome the limitations of a DC DC motor?

A: To eliminate these limitations, it is advisable to remove the brush from the DC alternator system. To achieve this, we can replace the permanent magnets with the electric magnet and place the permanent magnets on the stator rotor and coil.

What is a Universal Engine?

Answer: Because this type of motor can work with both AC current and DC current, this name is placed on the universal winding of the universal motor. It is important to note, however, that most use of this motor is by AC current.

How does Universal Engine work?

A: In this type of motor the mechanical force always remains unchanged; this stability comes from the fact that when a DC motor with a coil field is connected to the alternating current, the two coils of the field and the armature control the current change We will be. The design of the universal motor should be designed to be more in line with the AC current than the DC current.

What are the advantages and disadvantages of a universal engine?

Answer: One of the remarkable advantages of the Universal engine is that they have high starting torque, compact design and high speed, and can also be fitted with DC powered motors. Some of the disadvantages of universal motors include hard and rare repairs in Iran, how to maintain and supply hard parts (due to the hard-to-find commutator). These engines are less commonly used than other engines, which may be related to these.

DC DC or DC current is divided into several categories?

Answer: DC alternator or direct current are divided into three general categories of DC shunt DC motor, composite DC motor and DC series motor. The reason for this type of segmentation is similar to most existing ones because of the properties and applications of each of the above categories.

Where is the application of DC DC motor?

A: DC series electromotors are mostly used in crane impact presses, hydraulic lifts and elevators. The reasons for using this alternator in the aforementioned devices are the high torque of this electromotor and the need for high torque in the industries mentioned. Another use of DC electromotors is in urban locomotives such as subways and trams, which are referred to as traction or friction motors. 
Shunt DC electromotors are also used in industrial fans, blowers, etc. The most important reason for this DC Shunt alternator is to have maximum torque at rated speed. The point to keep in mind when launching this type of engine is that it should not be under heavy load as this will cause the armature to move upwards and damage the engine.

A: This type of electromotor has the characteristics of both DC and shunt DC motors and is divided into two additional components: faulty components.

What is the DC Component DC Motor Used for?

A: This motor is used when the speed is constant and the load is less than the rated load; for example laboratories that require an electric motor to provide constant speed will use a defective compact motor.

What is an additional DC DC motor?

A: When used in the industry, a series electric motor is required, but if the motor load is restrained and not exceeded, it is used. For example, lathes that are unloaded during each working period and then fully loaded will require the use of additional compost alternator. There have also been cases in the industry that use an additional compact motor instead of a series electric motor.




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