Regenerative braking is not recommended for tram ways and trolley buses because it
A) Increases the capital cost
(B) Enhance the operating problems
(C) Both (A) and (B)
(D) None of the above
Answers
Explanation:
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Answer:
Both (A) and (B)
Explanation:
DC shunt wound motors have regenerative braking by default, therefore no connection changes are necessary. Because DC shunt motors are electrically stable, their braking torque is unaffected by changes in line voltage.
Advantages:
1. A higher value of braking retardation is obtained, allowing for a swifter vehicle stop and a significantly shorter running duration.
2. When the mechanical brakes are deployed, a small amount of brake dust is generated.
Disadvantages:
1. Because of recovered energy, substation operation is complicated and challenging.
2. Mechanical braking is needed to bring the locomotive to a stop after rheostatic braking up to a speed of about 6.5 km/h and regenerative braking down to a speed of 16 km/h.
Regenerative braking is not advised for tramways and trolleybuses since it will unnecessarily raise the startup cost and operating issues. Regenerative braking is generally preferred and required for service lines with long grades greater than 0.6%.
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