Why does the core of a transformer need to be laminated?

Why does the core of a transformer need to be laminated?
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1 Answer

Answer :

Transformer cores are laminated to reduce eddy current loss.
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why the Transformer core is laminated?

Last Answer : Transformer core is laminated to reduce Eddy current losses.

The main purpose of using core in a transformer is to

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Last Answer : Reduce Relucatnce of the common magnetic circuit.

State any four characteristics of core type transformer.

Description : State any four characteristics of core type transformer.

Last Answer : Characteristics of core type transformer: i) It has one window. ii) It has one magnetic circuit. iii) Core surrounds the winding. iv) Average length of core is more. v) Area of cross ... Better cooling for winding. vii) Mechnical strength is comparatively less. viii) Repair and maintenance is easy.

A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The

Description : A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is

Last Answer : A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is 0.707

The core construction is like spokes of a wheel in following transformer:

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Last Answer : The core construction is like spokes of a wheel in following transformer:  Berry Type Transformer

The desirable properties of transformer core material are

Description : The desirable properties of transformer core material are  (1) low permeability and low hysteresis loss. (2) high permeability and high hysteresis loss. (3) high permeability and low hysteresis loss. (4) low permeability and hysteresis loss.

Last Answer : The desirable properties of transformer core material are high permeability and low hysteresis loss.

Material used for construction of transformer core is usually?

Last Answer : Material used for construction of transformer core is usually silicon steel.

When secondary of a current transformer is open-circuited its iron core will be?

Description : When secondary of a current transformer is open-circuited its iron core will be?

Last Answer : When secondary of a current transformer is open-circuited its iron core will be hot because of heavy iron losses taking place in it due to high flux density.

The size of a transformer core will depend on?

Description : The size of a transformer core will depend on?

Last Answer : The size of a transformer core will depend on frequency and area of the core.

Reduction in core losses and increase in permeability are obtained with transformer employing?

Description : Reduction in core losses and increase in permeability are obtained with transformer employing?

Last Answer : Reduction in core losses and increase in permeability are obtained with transformer employing core built-up of laminations of cold rolled grain oriented steel.

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Description : Why poles of dc machine are laminated?

Last Answer : Poles of DC machines are laminated to reduce the eddy current losses in the poles.

Laminated cores, in electrical machines, are used to reduce?

Description : Laminated cores, in electrical machines, are used to reduce?

Last Answer : Laminated cores, in electrical machines, are used to reduce eddy current loss.

In AC. circuits, laminated iron is invariably used in order to?

Description : In AC. circuits, laminated iron is invariably used in order to?

Last Answer : In AC. circuits, laminated iron is invariably used in order to reduce eddy current loss.

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A single core cable is designed to work for a single phase system with a peak voltage of 220 kV. The maximum

Description : A single core cable is designed to work for a single phase system with a peak voltage of 220 kV. The maximum permissible stress in the dielectric is not to exceed 20 kV/mm. For economical size, the overall core diameter of the cable is (A) 28.2 mm (B) 26.4 mm (C) 24.4 mm (D) 22.0 mm

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A ferrite core has less eddy current loss than an iron core because?

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Last Answer : A ferrite core has less eddy current loss than an iron core because ferrites have high hysteresis.

A single core lead sheathed cable with two dielectrics of permittivity 4 and 3, respectively, are subjected to

Description : A single core lead sheathed cable with two dielectrics of permittivity 4 and 3, respectively, are subjected to same maximum stress. If the conductor diameter is 1.5 cm, the outer diameter of the first dielectric is (A) 1.125 cm (B) 1.5 cm (C ) 2 cm (D) 8 cm

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The armature core of a D.C. generator is usually made of?

Last Answer : The armature core of a D.C. generator is usually made of silicon steel.

When a conductor carries more current on the surface as compared to core, it is due to?

Last Answer : When a conductor carries more current on the surface as compared to core, it is due to skin effect.

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