How To Define Specific Magnetic Loading Of Induction Motor

Jika anda sedang mencari How To Define Specific Magnetic Loading Of Induction Motor, anda berada di tempat yang tepat! Disini saya akan mencoba membahas beberapa pertanyaan mengenai How To Define Specific Magnetic Loading Of Induction Motor.

What are the ranges of specific magnetic loading in induction motor?

Specific Electric loading Normal range 10000 ac/m – 450000 ac/m.

On what factors does the choice of specific magnetic loading depends?

Following are the some of the factors which influence the choice of specific electric loadings. (i) Copper loss: Higher the value of q larger will be the number of armature of conductors which results in higher copper loss. This will result in higher temperature rise and reduction in efficiency.

What does magnetic loading mean?

Magnetic loading – The total flux in the air gap of a machine is called magnetic loading.It is measured in webers.This loading sets the limit on working flux without saturation. [ Magnetic loading=(number of poles)*(flux per pole)]

What is the value of specific electric loading?

30000 – 100000 ampere conductor / metre.

How do you find the specific magnetic load?

The specific electric loading is defined as the number of armature conductors per meter of armature periphery at the air gap. Specific electric loading=total number ampere conductors/armature periphery at air gap.

How many factors are used to determine the specific magnetic loading?

Explanation: There are 3 factors are used to determine the specific magnetic loading. They are maximum flux density in iron parts of machine, magnetizing current and core losses.

What are the effect of higher value of specific magnetic loadings and specific electric loadings?

Specific Electric Loading: This will result in higher temperature rise and reduction in efficiency. (ii) Voltage: A higher value of q can be used for low voltage machines since the space required for the insulation will be smaller.

Why do small machines have lower specific magnetic loading?

Specific Magnetic Loading The tapering of teeth is generally used in the small machine having small diameter. The ratio of Bt / Bav is large at the smallest width of teeth therefore the lower value of specific magnetic loading is permissible for a given value of teeth flux density ( Bt ).

What should be the minimum value of the ratio of the magnetic to electric loading?

What should be the minimum value of the ratio of the magnetic to electric loading? Clarification: The calculation of the ratio of the magnetic to electric loading is the second step in the design of the PMDC motors. It should have a minimum value of 50.

What is the value of specific electric loading for the salient pole?

Explanation: The value of specific electric loading for the salient pole alternators is 20,000-40,000 A per m.

What is slot space factor?

The slot space factor is the ratio of conductor area per slot and slot area. It gives an indication of the space occupied by the conductors and the space available for insulation. The slot space factor for induction motor varies from 0.25 to 0.4.

What do you mean by stacking factor?

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.

What is peripheral speed of induction motor?

For the normal design of induction motors the calculated diameter of the motor should be such that the peripheral speed must be below 30 m/s. In case of specially designed rotor the peripheral speed can be 60 m/s.

What is the formula of the specific electric loading?

Specific electric loading=total number ampere conductors/armature periphery at air gap.

What is Carter’s Gap coefficient?

The carter’s coefficient is a parameter that can be used to estimate the contracted or effective slot pitch in case of armature with open or semi enclosed slots. It is the function of the ratio Wo/lg where Wo is slot opening and lg is air gap length. Kcs=Wo/lg or.

How many factors influence the power factor of an induction motor?

How many factors influence the power factor of an induction motor? Explanation: There are 2 factors which influence the power factor of an induction motor. They are magnetizing current and ideal short circuit current. 2.

How should be the specific loadings to design a machine with reduced dimensions?

How should be the specific loadings to design a machine with reduced dimensions? Explanation: The output coefficient is proportional to the product of specific magnetic loading and specific electric loading. The output coefficient of a rotating electric machine is inversely proportional to the output coefficient.

Why does the weight of iron in the armature core decrease with increase in number of pole?

loss in the armature increases and therefore efficiency of the machine decreases. It is clear that Ay is ∝ 1/P as By is also almost constant for a given iron. Thus, as the number of poles increases, Ay and hence the weight of iron used for the yoke reduces.

How do you select flux density?

The value of flux density is chosen to suit the guaranteed performance. Normally flux density is chosen near the knee point of magnetisation curve. However in some cases flux density value is reduced to limit the noise level of transformer.

What is the relation between pole pitch and the core length in terms of the best power factor?

6. What is the Relation between pole pitch and the core length in terms of the best power factor? Explanation: For the best power factor, the pole pitch is equal to the square root of the product of 0.18 and core length.

What is electric loading in motor?

Electric motor load means the current drawn by an electric motor. It depends upon the load on the shaft of the motor. For a given electric motor, it can estimated using input power, amperage or speed of the motor. Most electric motors are designed to run at 50 % to 100 % of rated load.

What are the factors that influence the choice of commutator diameter?

Ans: The factors which influences the choice of commutator diameter are (i) The peripheral speed (ii) The peripheral voltage gradient should be limited to 3 V/mm (iii)Number of coils in the armature.

How do you calculate overload size?

The overloads are determined using 125% of the FLA, 7A x 1.25 = 8.75A. The maximum allowable size for the overloads is 9.8A. The overloads can be sized at 140% of the FLA if the overloads trip at rated load or will not allow the motor to start, 7A x 1.4 = 9.8A.

How do you calculate overload?

Divide by the rated full load current from the motor nameplate. This will be the load factor for the motor. If the motor current is 22A and the rated full load current is 20A, then the load factor is 22/20 = 1.1. This means the motor is overloaded by 10%.

Terimakasih telah membaca How To Define Specific Magnetic Loading Of Induction Motor, semoga jawaban dari pertanyaan anda telah saya jawab semua. Semoga bermanfaat!