Bridge Transition
The main advantage of bridge transition method is that none of the motor is
disconnected from the supply during transition.
1. All starting resistances are shorted and motors are in series.
2 & 3. Bridge link is moved, till a portion of starting resistance is connected in parallel 4. Bridge link is and motors are in parallel with individual starting with each motor.
resistances which will be gradually cut down. It is seen that during transition, the two motors remain connected to the supply. And the resistances are varied such that motor current remains almost same. Hence, torque remains the same and jerk is avoided. So uniform acceleration is obtained.
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| (a) Series |
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| (b) Transition |
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| (c) Transition |
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| (d)Parallel |
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