Ward-Leonard control is basically a:

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ALP CBT 2 Electrician Previous Paper: Held on 23 Jan 2019 Shift 1
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  1. Voltage control method
  2. field diverter method
  3. field control method
  4. armature resistance control method

Answer (Detailed Solution Below)

Option 1 : Voltage control method
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Ward-Leonard method of speed control is achieved by varying the applied voltage to the armature. Hence it is basically a voltage control method. The connection diagram is shown below.

RRB JE EE 27 15Q FT0 Part2 Hindi -5

In the above system, M is the main DC motor whose speed is to be controlled, and G is a separately excited DC generator. The generator G is driven by a 3-phase driving motor.

The voltage of the generator is changed by changing the generator field current. This voltage when directly applied to the armature of the main DC motor, the speed of the motor M changes.
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