What is armature reaction in DC machines?

What is the purpose of compensating windings in DC machines?
Answer : The purpose of compensating windings in DC machines is to help **reduce the effect of armature reaction**. Armature reaction occurs when the magnetic field produced by the armature current ... maintain the smooth operation of DC machines by counteracting the negative effects of armature reaction....

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What is the purpose of interpoles in DC machines?

What is the purpose of interpoles in DC machines?
Answer : Interpoles, also known as commutating poles, are used in DC machines (both motors and generators) to improve commutation and prevent sparking at the brushes. Their purpose can be explained ... improve the reliability and efficiency of DC machines by reducing the problems caused by commutation....

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What are different losses in DC machines and on what factors do they depend?

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Who is the father of DC machines?

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What are the types of DC Machines?

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Write short notes on the types of DC machines.

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Write the armature current and voltage relationship of a Separately excited DC Generator.

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What is Chain reaction and how it is controlled in Nuclear reactor?

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What is the significance of the air gap in electrical machines?

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What is the function of slip rings in electrical machines?

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What is the purpose of damper windings in synchronous machines?

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What is synchronous speed in AC machines?

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What is the purpose of field windings in electrical machines?

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Name power losses in rotating electrical machines.

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How can we eliminate eddy current losses in induction machines?

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What is the effect of hysteresis loss in transformer machines?

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Compare Horizontal axis and vertical axis wind machines on the basis of: (i) Power captured for the same tower height. (ii) Noise problem. (iii) Complexity of design and yaw mechanism (iv) Effect of fatigue arising from numerous resonances in structure.

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What is an armature in a motor?

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Why field rheostat is kept in minimum position while armature rheostat at maximum position?

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In the motors starting purpose why the armature rheostats at maximum position while the field rheostat is kept in minimum position?

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What is the best way to minimize the eddy current in an armature?

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What is the best way of minimizing eddy currents in an armature?

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State any four advantages of having stationary armature in case of three phase alternator.

State any four advantages of having stationary armature in case of three phase alternator.
Answer : In a three-phase alternator, having a stationary armature (i.e., the armature is fixed and the rotor rotates) provides several advantages: 1. **Simplified Design**: A stationary ... seen in machines with rotating armatures. This leads to lower maintenance requirements and longer operational life....

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What is the significance of lamination in the armature?

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What is the significance of air holes in the armature?

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What is the formula for the impulse reaction?

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What is the equation for a first rate reaction?

What is the equation for a first rate reaction?
Answer : The equation for a **first-order reaction** relates the concentration of the reactant to time. For a reaction where the rate depends linearly on the concentration of one reactant, the ... shows that for a first-order reaction, the concentration of the reactant decreases exponentially over time....

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What is the equation for a zero order reaction?

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What is a first order reaction?

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