Calculate the acceleration time, Mathematics

Question

A 22 kW, 3-phase, 415 V, 40 A, 50 Hz, 960 rpm, 0.88 PF squirrel cage induction motor drives a pump. The total inertia of the drives system is 1.2 kg-m2.

Determine the number of starts per minute this drive can be subjected to without exceeding the total power dissipated in the motor under rated conditions. Assume a ratio of stator to rotor resistance of unity and neglect magnetizing current and rational losses.

Hint: Energy lost by the motor during starting under no load = ½ * J * wS2

(1 +Stator resistance / Rotor resistance).

Question

Considering the same 22 kW of the above problem and the same assumptions, what will be the effect of the no. of starts restriction if the motor is of 2 pole construction?

Question

Consider a motor of 1000 kW, 996 rpm rating with an inertia of 80 kg-m2; driving a fan of Load Inertia: 1875 kg-m2. Load torque required at 650rpm can be assumed to be 45%. Frictional Torque can be assumed to be 10%. Calculate the acceleration time of the motor up to 650 rpm assuming that the motor has to accelerate without driving the load (solo).

Hint: Angular acceleration = (Final speed, rps - Initial speed, rps) / Acceleration Time.

Question

The above referred drive system is engineered such that the motor gets coupled to the load at 650 rpm. What is the torque available for the motor to accelerate in this loaded condition? Calculate the acceleration time to reach a speed of 700 rpm.

Posted Date: 2/26/2013 12:21:58 AM | Location : United States







Related Discussions:- Calculate the acceleration time, Assignment Help, Ask Question on Calculate the acceleration time, Get Answer, Expert's Help, Calculate the acceleration time Discussions

Write discussion on Calculate the acceleration time
Your posts are moderated
Related Questions
The lower portion of a hay stack is an inverted cone frustum and the upper part is a cone find the total volume of the hay stack.

Method of disks or the method of rings One of the simple methods for getting the cross-sectional area is to cut the object perpendicular to the axis of rotation.  Carrying out

i need to work out the standard deviation of 21.4

HE IGHTS AND DISTANCES If the angle of elevation of cloud from a point 'h' meters above a lake is α and the angle of depression of its reflection in the lake is  β , prove

Assume that Y 1 (t) and Y 2 (t) are two solutions to (1) and y 1 (t) and y 2 (t) are a fundamental set of solutions to the associated homogeneous differential equation (2) so, Y

A telephoned dialled number 0 to 9.if 0 is dialled first the caller is connected to the international exchange system.find the number of local calls that can be rung if a local num

I am the least two digit number which round off to 100?

A conical vessel of radius 6cm and height 8cm is completely filled with water. A sphere is lowered into the water and its size is such that when it touches the sides, it is just im

which physics law is used to describe heat loss in cylindrical pipe

#question.find the number of combinations of the letters a, b, c, and d taken 3 at a time.