The figure below shows an electrical motor driving a load that has one dominant vibration mode. This is a typical problem in electromechanical position control such as computer-disk-head control. The motor has an electrical constant Kẹ, a torque constant Kt, an armature inductance La, and a resistance Ra. The rotor has inertia J1 and a viscous friction B. The load has inertia J2. The two inertias are connected by a shaft with a spring constant K and an equivalent viscous damping b.

The figure below shows an electrical motor driving a load that has one dominant vibration mode. This is a typical problem in electromechanical position control such as computer-disk-head control. The motor has an electrical constant Kẹ, a torque constant Kt, an armature inductance La, and a resistance Ra. The rotor has inertia J1 and a viscous friction B. The load has inertia J2. The two inertias are connected by a shaft with a spring constant K and an equivalent viscous damping b.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter39: Synchronous Motor Operation

Section: Chapter Questions

Problem 12SQ

See similar textbooks

Similar questions

Q4/B/ What are the principal characteristics of a series DC motor? What are its uses? Core Mc
#T Consider figure and assume that the rotational torque is 200 N-m and the radius of the rotor is 0.25 m. Determine the applied force in N. a) If the angle 0 is 15° b) If the angle 0 is 45° AIN sin (180 - 0)=rand Action line
In a DC motor, why forces are generated for parts of the loop and not for other parts of the loop. The Force equation with sin theta ( max force when theta is 90 degrees or perpendicular to magnetic field lines.)
Q2) In DC machine, the speed is 800 RPM, the flux per pole is 2 m wb, and it has a Lap winding armature with 6 coils (4 turns conductor per coil) . The DC machine has 2 poles and armature draws lc= 5.5 A. If the winding redesigned as wave winding, find the EA , Tem and Pem and explain what will happen when we change the design from lap to wave winding connection.
i. Briefly describe the 5 major types of DC generators according to the manner in which their field flux is produced.
A DC series motor is driving a load whose torque is constant and independent of the speed. The motor speed is increased from 1000 RPM to 1200 RPM by connecting a diverter resistance across its field. Find the Armature to the field winding current. Assume negligible drop across the field winding and a linear magnetic circuit
uz In a PMMC, analyze the changes in deflection torque produced.with Increments in flux per pole. O a. Deflection torque Increased O b Deflection torque Decreased O cThere is no relationship between the sald two O d. Deflection torque Unchanged search
A permanent magnet dc motor has a rotor radius of 1.3 cm, magnetic thickness of 0.25cm, and a gap length of 0.05 cm. The magnetic flux density in the motor is,
The armature of a 6 pole, lap wound dc machine has 54 slots. Each coil has 15 turns. The average flux density is 1.2 T. The armature length is 15 cm and the diameter is 30 cm. The magnetic poles are designed to cover 90% of the surface area. If the armature speed is 1200 rpm, determine the(i) induced emf in the armature winding (ii) induced emf in the coil(iii) induced emf per turn induced (iv) emf in each conductor(v) What is the power and torque if each conductor is rated at 10 amps?(vi) Which of the above values would change if the generator was wave connected?
the armature of a 12 pole wave wound dc shunt generator has 50 slots with 12 conductors per slot. the generatoris running at a speed of 625 rpm and supplies a resistive load of 15 ohm at a terminal voltage 350v. the armature and the field reisitance are0.5 ohm and 70 ohm respectively. find the armature current,generated emf and flux per pole
8) A 230 V fed single quadrant chopper has a 40% duty cycle. A separately excited DC motor is controlled by a chopper. Motor has a back emf constant of 0.5 V/rad/s and 2 22 armature resistance. Determine the torque of motor at speed of 1400 rpm 4.7 N-m 15.44 N-m 10.5 N-m 19 N-m
(7) The only parts suffers from eddy currents in AC motors: a- The stator. b- The rotor. c- The stator and rotor. (8) The unit of torque is a- W (rad. s') b- Js -1 C- Nm