The basic design of an electrical machine involves the dimensioning of the magnetic circuit, electrical circuit, insulation system etc., and is carried out by applying analytical equations. A designer is generally confronted with a number of problems for which there may not be one solution, but many solutions.
What do you mean by electrical machine design explain in brief the limitations in design of electrical machine?
The materials used for the machine and others like cooling etc., carry out a limitation in design. The constraints stem from saturation of iron, current density in conductors, temperature, insulation, mechanical properties, efficiency, power factor etc.
What are the main design parts of an electric machine?
The basic components of all electromagnetic apparatus are the field and armature windings supported by dielectric or insulation, cooling system and mechanical parts. Therefore, the factors for consideration in the design are, Magnetic circuit or the flux path: Should establish required amount of flux using minimum MMF.
What are the main factors affecting the design of electrical machine?
Major considerations in Electrical Machine Design
- Magnetic circuit or the flux path:
- Electric circuit or windings:
- Cooling system or ventilation:
- Machine parts:
What is electrical machine and its types?
The electric machines are of three main types, transformer, generator, and motor. Electrical Transformer: In the transformer, both input and output are electrical power. Electrical Generator: In a generator, the input is mechanical power and the output is electrical power.
What are the limitations of machine design?
LIMITATIONS IN ELECTRICAL MACHINE DESIGN
- LIMITATIONS IN ELECTRICAL MACHINE DESIGN. …
- SATURATION: …
- TEMPERATURE RISE: …
- INSULATION: …
- EFFICIENCY: …
- COMMUTATION: …
- POWER FACTOR: …
- CONSUMER SPECIFICATION:
What are limitations in design?
Design constraints are limitations on a design. These include imposed limitations that you don’t control and limitations that are self-imposed as a way to improve a design. The following are common types of design constraint.
What factors consider design of machine?
Four basic factors that are to be considered while selecting the materials are: availability, cost, mechanical properties, and manufacturing considerations.
What is space factor in electrical machine design?
The stacking factor (also lamination factor or space factor) is a measure used in electrical transformer design and some other electrical machines. It is the ratio of the effective cross-sectional area of the transformer core to the physical cross-sectional area of the transformer core.
How do you design a transformer?
Designing a transformer using an example:
- Sec.Volt-Amps(SVA) = Vs * Is = 60 * 4.44 =266.4VA.
- Prim.Volt-Amps(PVA) = SVA / 0.9 = 296.00VA.
- Prim.Voltage (Vp) = V2 / (n2/n1) = 60/0.5= 120V.
- Prim.current (Ip) = PVA/Vp = 296.0/ 120 = 2.467A.
- Core Area(CA) = 1.15 * sqrt(PVA) = 1.15 * sqrt(296) = 19.785 cm²
What are the general features of electrical machine design and main areas of design?
The basic design of an electrical machine involves the dimensioning of the magnetic circuit, electrical circuit, insulation system etc., and is carried out by applying analytical equations. temperature rise and lower cost. Also they are to be reliable and durable.
What is the meaning of pole pitch?
The pole pitch is defined as the peripheral distance between centers of two adjacent poles in dc machine. This distance is measured in terms of armature slots or armature conductors come between two adjacent pole centers. A pole pitch in the electrical machine is equal to 180° electrical.
What is rating of machine?
The rating of machine refer to the whole of the numerical values of electrical and mechanical quantities with their duration and sequence assigned to the machines by the manufacturer and stated on the rating plate, the machine complying with the specified conditions.
What is an electric machine?
An electrical machine is a device which converts mechanical energy into electrical energy or vice versa. Electrical machines also include transformers, which do not actually make conversion between mechanical and electrical form but they convert AC current from one voltage level to another voltage level.
What are electric machines used for?
Electric motor‐driven systems used 68% of this total electricity for essential energy intensive industrial processes such as refrigeration, pumps, fans, compressors, materials handling, materials processing, and facility HVAC systems.
What is electrical machinery and equipment?
The electrical machinery and equipment sector is composed of a diverse range of activities that are mainly supplied to professional downstream users in the form of electro-technical equipment and less frequently to consumer markets.