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FinnZ [79.3K]
3 years ago
7

A control system that is used in elevator system

Engineering
1 answer:
ozzi3 years ago
4 0

Explanation:

Elevator controller

An Elevator controller is a system to control the elevators, either manual or automatic. The controller usually tune down the voltage between 12V to 24V to the controlling system, Only the motor needs 3-phase power supply.

https://elevation.fandom.com › wiki

Elevator control system | Elevator Wiki | Fandom

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Answer:a

a) Vo/Vi = - 3.4

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Explanation:

a)

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b)

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for ideal op-amp

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so

(Va-Vi)/5kΩ + (Va-Vo)74kΩ = 0

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c)

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Va≈Vb=0 so Va=0

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(Va - Vi)/5kΩ + (Va - Vo)/5000kΩ = 0           ( 5MΩ = 5000kΩ )

so

-Vi/5kΩ + -Vo/5000kΩ = 0

Vo/Vi = - 5000kΩ/5kΩ

Vo/Vi = - 1000

║Vo/Vi ║ = 1000  ( negative sign phase inversion)

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