Electrical Energy conversion, Electromechancial energy conversion

Physical phenomenon involved in electro-mechanical energy conversion .

Electrical energy conversion into mechanical energy or vice versa is known as electromechanical energy or vice versa is known as electromechanical energy conversion.

Electromechanical energy conversion involves the interchange of energy between an electrical system through the medium of a coupling electric field or magnetic field. Therefore, an electromechanical conversion system has three essential pars viz. an electrical system, a mechanical system and a coupling field (electric field or magnetic field. Therefore, an electromechanical conversion system has three essential part viz. an electrical system, a mechanical system and coupling field (electric or magnetic). In below fig shows the block diagram of an electromechanical energy conversion system. Note that from left to right, the system represents electrical energy conversion into mechanical energy. However, from right to left, it will represent conversion from mechanical to electrical.some important steps given below for electrical energy conversion.

Field input ----- Electrical system ---- Coupling field ------ mechanical system ----- mechanical output.

Electromechanical energy conversion can take place when electric field is used as the medium. Consider the case of a current-carrying conductor placed in a magnetic field. The conductor experiences a force that tends to move it. If the conductor is free to move in the direction of the magnetic force, the magnetic field helps the conversion of electrical energy into mechanical energy. This is essentially the principle of operation of all electric motors. One the other hand, if an externally applied force moves the conductor in a direction opposite to the magnetic force, mechanical energy is converted into electrical energy. The generator action is based on this principle. Note that in both cases, the magnetic field acts as a medium, a system for energy conversion.

It is important to note that the quantity of energy that can be converted by a device using electric field as a medium is relatively small. It is because the amount of force developed by an electric system is usually very small even when the applied voltage. These are method which can be electrical energy conversion processes complete.

Electromechanical energy conversion can also take place more effectively when magnetic field use as the medium. Consider the case of a current carrying conductor placed in a magnetic field. The conductor experiences a force that tends to move it. If the conductor is free to move in the direction of the magnetic force, the magnetic field helps the conversion of electrical energy into magnetic energy. The generator action is based on this principle. Note that in both cases, the magnetic field acts as conversion.

It is important to note that the quantity of energy that can be converted by a device using electric field as a medium is relatively small. It is because the amount of force developed by an electric system is usually very small even when the applied voltage is high and the physical dimensions of the system are quite large. However, when magnetic field is dimensions develops a much larger force than a system using an electric field as a medium. For this reason, the use of electric field as a medium for energy conversion has limited applications.

Electromechanical energy conversion takes place through electric field or magnetic field as the medium. Although the various conversion devices operate on common set of physical principles, the structure of the devices depend on their function. Electromechanical energy conversion devices can be divided into following three categories: or for electrical energy conversion various types device which can be used for electrical energy conversion.

these conversion devices are used for measurement and control. They generally operate under linear input-output conditions and with relatively small signals. Examples include microphones, puck ups and loudspeakers. Transducer is most important for electrical energy conversion.

 these conversion devices are meant for producing force or torque with limited mechanical motion. Examples include relays, solenoid actuators and electromagnets.

These devices continuously convert electrical energy into mechanical energy or vice versa. They are used for bulk energy conversion and utilization. Motors and generators are the examples of such conversion devices. 

Electromechanical energy conversion takes place through the medium of magnetic field. The following salient features are worth noting in this energy conversion:

the principle of conversion of energy hoods good in case of electromechanical energy conversion. That is energy can neither be created nor destroyed; it can only be changed from one from another.

2. During electromagnetically energy conversion, various losses occur in the system. This is illustrated in fig 2 which shows the conversion of electrical energy into mechanical energy.

The electrical energy loss is due to current following in the winding (having resistance R) of the energy converter . The field loss due to changing magnetic field in the magnetic core. The mechanical loss is the friction and wind age loss due to the motion of the moving components. All these losses are converted into heat and raise the temperature of the energy conversion system.

3. Electromechanical energy conversion is a reversible process except for the losses in the system. The term reversible means that the energy can be transferred back and forth between the electrical and the mechanical systems. However, each time we go through an energy conversion process, some of the energy is used up to meet the losses in the conversion process. These losses are converted into heat and are lost form the system forever.

4. Electromechanical conversion devices are built with air gaps in the magnetic circuit to separate the fixed and moving parts. Most of the MMF of the winding is required to overcome the air-gap reluctance so that most of the energy is stored in the air gap and is returned to the electric source when the field is reduced.

5. The electromechanical (electrical) energy conversion system can be analyzed by using principle of conservation of energy, lows of electric and magnetic field, electric circuit and Newtonian mechanics.

6. The rotating electrical machine (motor and generators) continuously convert electrical energy into mechanical energy or vice versa.

Energy balance Equation 

This energy equation is useful for electrical energy conversion.

An electromechanical energy conversion system has three essential parts viz. An electrical system, a mechanical system and a coupling magnetic field as shown in fig. since conversion of energy from one from into another from satisfies the principle of conservation of energy, the energy transfer equation is as under:

Hence these are electrical energy conversion system if you will find any incorrect above please comment below in comment box.

 If you want know more about the electrical energy conversion you must watch this video.