Electric Motor Control
10th Edition
ISBN: 9781305177611
Author: Herman
Publisher: Cengage
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Chapter 31, Problem 9SQ
What is meant by the “compelling action” produced by an accelerating relay?
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Chapter 31 Solutions
Electric Motor Control
Ch. 31 - Excluding slip, at what speed (r/min) will an...Ch. 31 - What is meant by the description separate winding...Ch. 31 - Prob. 3SQCh. 31 - Prob. 4SQCh. 31 - In Figure 314, what does the broken line between...Ch. 31 - When the high button is depressed in Figure 314,...Ch. 31 - Which coils are energized immediately when the...Ch. 31 - At what speed can a four-pole, 240-volt, 5-hp,...Ch. 31 - What is meant by the compelling action produced by...Ch. 31 - Prob. 10SQ
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- (b) Derive the steady state voltage equations for a compensated metadyne generator shown in Fig.1 A 2kW, 200V, 1500rpm, 2-pole fully compensated metadyne generator has the following parameters: Field self inductance and resistance 30Η, 200Ω Armature self inductance and resistance 0.067, 1 Ω - Field armature mutual inductance 1.2H Calculate for steady state operation, the field current and power gain at rated output. 19-axis १६ Fig. 1 Laxis -arrow_forwardQ2: Determine the suitable auto-transformation ratio for starting a 3-phase induction motor with line current not exceeding three times the full-load current. The short-circuit current is 5 times the full-load current and full-load slip is 5%. Estimate also the starting torque in terms of the full-load torque.arrow_forward(a) Explain the required tests to construct the circle diagram of the induction motor. The stator leakage impedance of a star connected induction motor is (0.5+j1.4) § per phase, and the rotor leakage impedance referred to stator is (0.6+j1.5) 2 per phase. Neglect the magnitizing current, estimate the line current and torque if the machine runs with a slip of 5 percent when connected to a 400V three phase supply (i) normal operation, and (ii) with one line open.arrow_forward
- Q2. Enumerate the stages in derivation from first principles of the voltage equation for unbalanced operation of three phase induction motor. Find the efficiency of an induction motor at full load. The machine details are given in the following: 2000hp, 2300V, 3-phase star connected, 60Hz, 4-pole, full load slip R, 0.022, R, 0.1202, Re-451.29, X=500, X, X,=0.320, = 0.03746, When the speed is 1400rpm, using the synchronous reference frames model and rotating reference model. [17M]arrow_forwardDerive the steady state voltage equations for a compensated metadyne generator shown in Fig.1 A 2kW, 200V, 1500rpm, 2-pole fully compensated metadyne generator has the following parameters: Field self inductance and resistance 30Η, 200Ω Armature self inductance and resistance 0.06Η, 1 Ω Field armature mutual inductance 1.2H Calculate for steady state operation, the field current and power gain at rated output. 19-axis บ Fig. 1 F daxisarrow_forward(b) Derive the transformations for currents between a rotating balanced two phase (a,ẞ) winding and a pseudo stationary two phase (d,q) winding. (assume equal turns on all coils). From power invariance, show that the voltage transformations are identical to those for the currents. Describe, from physical concepts, how the transformation may be used to represent a three phase synchronous machine. Explain how torque is developed.arrow_forward
- Q3. (a) Explain the principle of operation of the induction generator and compare its characteristics with those of the alternator. (b) A 3 phase synchronous generator is delivering a power of 0.9 infinite bus at rated voltage and at a pf 0.8 lagging. The generator has X-1 & X=0.6p.u. Determine the load angle and the excitation voltage. In case loss of excitation takes place, will the generator remain in synchronism?arrow_forwardGeneralized Machine Theory Attempt ALL Questions. Q1. (a) Explain and illustrate the object of the performance analysis of any type of machine by unified theory. [8M]arrow_forward"Using emu8086 programming, I need two different solutions based on a source." write a program to move a block of 100 numbers consecutive bytes of data strings at offset address 8000 H in memory to another block of memory locations starting at offset address A000 H. assume that both blocks are in the same data segment value 3000H . Write an 8086 program that complements the first byte of flags register.arrow_forward
- "I need proof in the solution and a supported source with the solution." a. Write an 8086-microprocessor program to clear bits 0 to 5, set bits 6 to 10 and complement bits 11 to 15 of word stored in a memory location 34000H. b. Write an 8086-microprocessor program to added number 5 to each number from (16 to 0) and then store in memory locations starting at the offset address of 3000H.arrow_forward"I need proof in the solution and a supported source with the solution." a. There are 20 data bytes are stored in memory location with offset address 3000H. Write 8086 microprocessor program to transfer the block of data to new location with offset address 4001H. b. Write an 8086 program to implement the equation g=x(y + z) where x = 10H, y = 20H and z = 30H and store the result in a memory location 45000H.arrow_forward"Using emu8086 programming, I need two different solutions based on a source." Write an assembly language program to execute of the following tasks: 1. Execute the operation of an EX-NOR (exclusive nor) without utilizing the XOR instruction. 2. Without using DIV instruction, divide the content AX by (L=8).arrow_forward
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