Problem 4. A 10 kVA induction motor operating at 80 percent lagging pf and a 5 kVA synchronous motor operating at 70 percent leading pf are connected in parallel across a 220 V 60 Hz power line (Figure 3). Find the total real power Pr, total reactive power QT, total power factor pfr, total apparent power ST, and total current IT. V₁= + = 220V 60 Hz A ||SA| = M =10kVA pf₁ = 0.80 lagging Induction motor Figure 3 IB B ||SB| = 5kVA MB PfB = 0.70 leading Synchronous motor

Problem 4. A 10 kVA induction motor operating at 80 percent lagging pf and a 5 kVA synchronous motor operating at 70 percent leading pf are connected in parallel across a 220 V 60 Hz power line (Figure 3). Find the total real power Pr, total reactive power QT, total power factor pfr, total apparent power ST, and total current IT. V₁= + = 220V 60 Hz A ||SA| = M =10kVA pf₁ = 0.80 lagging Induction motor Figure 3 IB B ||SB| = 5kVA MB PfB = 0.70 leading Synchronous motor

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter39: Synchronous Motor Operation

Section: Chapter Questions

Problem 14SQ: Induction motors and welding transformers require magnetizing current, which causes a. lagging power...

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