Find output power and efficiency for load that drops speed

Assignment Help Electrical Engineering

Reference no: EM131026147

A permanent-magnet dc motor has RA = 0.5 Ω. With no load, it operates at 1070 rpm and draws 0.5 A from a 12.6-V source. Assume that rotational power loss is proportional to speed. Find the output power and efficiency for a load that drops the speed to 950 rpm.

Reference no: EM131026147

Questions Cloud

Determine the speed at which the armature current : Running at 1200 rpm from a 280-V source, a series-connected dc motor draws an armature current of 25 A. The field resistance is 0.2Ω, and the armature resistance is 0.3 Ω. Assuming that the flux is proportional to the field current, determine the ..

An animal origin contain proteins : Natural polymers that have an animal origin contain proteins that are composed of amino acids. Two specific amino acids (methionnc and cysteine) produce what two toxic gases, upon decomposition and combustion?

What are the potential consequences of having the load : A series-connected dc motor is designed to operate with a variable load. The resistances RA and RF are negligible. To attain high efficiency, the motor has been designed to have very small rotational losses. For a load torque of 100 Nm, the machi..

Write an easy essay about jupiter : Write an easy essay about Jupiter.

Find output power and efficiency for load that drops speed : A permanent-magnet dc motor has RA = 0.5 Ω. With no load, it operates at 1070 rpm and draws 0.5 A from a 12.6-V source. Assume that rotational power loss is proportional to speed. Find the output power and efficiency for a load that drops the spee..

Calculate equilibrium constant for fe : Calculate equilibrium constant for Fe(s)+Ni+2 yields Fe+2 +Ni

What is the portfolio beta : You own a stock portfolio invested 15 percent in Stock Q, 35 percent in Stock R, 25 percent in Stock S, and 25 percent in Stock T. The betas for these four stocks are 1.8, .6, 1.9, and .8, respectively. What is the portfolio beta?

Inflation-adjusted principal at end of the first six months : Suppose a portfolio manager purchases $ 1 million of par value of a Treasury inflation protected security (TIPS). The yield is 2.4%. a. Assume that the end of the first six months the CPI is 2.6% (annual rate). Compute (1) the inflation adjustment to..

Find the armature resistance : A permanent-magnet automotive fan motor draws 20 A from a 12-V source when the rotor is locked (i.e., held motionless). Find the armature resistance.

User Account

All Pages