1) DRAW A SCHEMATIC DIAGRAM FOR AUTOMATIC FORWARD & REVERSE MOTOR CONTROL USING LIMIT SWITCH, RELAY AND TEMPERATURE SENSOR. (Use temperature sensor to signal the transition of motion). ECUE
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- J1. What are the standard identification letters for the shunt field winding of a DC compound motor? a) A1 and A2 b) S1 and S2 C) F1 and F2 d) none of the above J2. The commutating field is another term for interpoles. a) true b) false J3. What are the standard identification letters for the commutating field winding of a DC compound motor? a) C1 and C2 b) S3 and S4 c) either "a" or "b" d) neither "a" nor "b"What is synchro? Explain how it is controlled with respect to control system9-In a the shunt field winding is connected in parallel with the armature winding only. Ish Series . Field EJR Shunt Rsh Rse Field 10-The consist of and 11- E = (V – IaRa ) then N = LOAD
- Which one of the following statements is not correct about synchronous machine Select one: O a. The rotor dc current is required only for synchronous generator O b. The induced voltage in the stator depends on the rotor dc current O. The resistance of the stator windings can be neglected compared with the value of the synchronous reactance If the synchronous motor is overexcited, then: Select one: O a. The motor will absorb reactive power to the source. O b. The motor will operate at unity power factor. O c. The motor will deliver reactive power to the source. O d. The motor will deliver real power to the source.Match motor types with their illustrations. OO PMSM IM Sync. Reluctance TIR3. A 25 Kw shunt generator is delivering full output to 4O0V bus bars and is driven at 950 rpm by belt drive. The belt breaks suddenly but the machine continues to run as a motor taking 25 Kw from the bus bars. At what speed does it run? Take armature resistance including brush contact resistance as 0.5 ohm and field resistance as 160 ohms.
- Which DC Motor(s) is(are) suitable for constant speed loads? (You can select multiple types) O A) Series DC Motor B) Permanent Magnet DC Motor C) Compound DC Motor D) Shunt DC MotorDefine or state the principle of operation, draw the wiring diagram, discuss the construction and application of each motor Split phase capacitor motor Repulsion motorc) What is the physical meaning for each of the following induction motor parameters: R1 „R2 ,Rc ,X1 ,X2 ,Xm ?
- 2 Helting. Avoid interruption and keep your files safe with genuine Office today. b. 3 5 A 30 hp, three-phase, wye connected, 60 Hz, 360 VLL, synchronous motor is operating at 50% full load, rated voltage and 0.8 pf leading (over-excited). The motor has negligible armature resistance and a synchronous reactance of 2.5 02/phase. Stator core loss is 1kW and friction and windage loss is 1.5 kW. a. Calculate the new value of line-to-neutral excitation voltage and load angle when the field current is adjusted for 0.85 pf lagging with the same 15 hp load. Determine the load angle, current (with angle), and the reactive power exported (positive) or imported (negative), when the motor load is 30 hp and the line-to-neutral excitation voltage is 255V. Get genu 7Q2] What is the Ward-Leonard motor control system? What are its advantages and disadvantages?write true or false in the following sentences: 1. Load torques which always oppose the motion and change their sign on the reversal of motion are called passive load torques. 2. The control rectifier drive has low atmature current ripple compare to de to de chopper drives. 3. The main difference between dynamic breaking and regenerative braking of de motor is the disconnection the source from de motor in dynamic braking. 4. Two quadrant operation of de motor can be obtained from thee phase semiconverter. 5. de-de four-quadrant drives can be supply high power than ac-de four-quadrant drives.