Consider a full-wave, single-phase controlled rectifier, similar to that shown in Figure 12.2, that is used to drive a DC motor instead of the resistive load Ro. Assume that the motor is rated at 4 kW and 110Vrms and that the AC supply is 80Vrms 60 Hz. Also assume that the motor inductance is very large such that the motor current is ripple-free and that the motor constant is 0.055 V/rpm. If the motor runs at 1,000 rpm at rated current:
Find:
a) Determine the firing angle of the converter.
b) Determine the rms value of the supply current.
Analysis:
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A. Music Wire Gauge B. US Steel Wire Gauge C. W&M Wire Gauge D. American Wire Gauge
Most manufacturers recommend that a new (or reconditioned) engine be properly ____________________ to make sure that all components are sealing well and that all components mesh together properly.
Fill in the blank(s) with the appropriate word(s).
Compute the measure of ?A rounded to the nearest minute.
Fill in the blank(s) with the appropriate word(s).
In a guaranteed maximum price contract, costs above the guarantee are absorbed by the owner
Indicate whether the statement is true or false