1 v d what is the efficiency at this operating point

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 0.1 V) d. What is the efficiency at this operating point? (80.6%) Problem 5: A 10HP PM DC motor is controlled by a power converter that can adjust its terminal voltage between 0 and 120VDC. The input voltage to the power converter is 144VDC. The parameters of the machine are ra = 0.143Ω, Kv = 1.104V·s and TLoss is negligible. If TLoad is fixed at 70N·m (regardless of speed): a. To achieve a rotor speed of 60rad/s, i. Find the required armature current and armature voltage. [Ia = 63.4A, Va = 75.3V] ii. Find the converter duty cycle. [D = 52.3%] iii. If the converter is 93% efficient, determine the average current out of the 144V source. [Is = 35.6A]...
View Full Document

Ask a homework question - tutors are online