With reference to Example 18.12, calculate the required holding current to keep the relay closed. The mass of the moving element is m = 0.05 kg. Neglect damping. The initial position is x = ?= 0.001 m.
Example 18.12
Figure 18.46 depicts a simplified representation of a relay. Determine the current required for the relay to make contact (i.e., pull in the ferromagnetic plate) from a distance x.
Assumptions:
Air gap becomes zero and the iron reluctance cannot be neglected.
Analysis:
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