
Concept explainers
Explain the process how 230/460-volt motor is used as a part winding motor.

Explanation of Solution
Part winding motor:
The part winding motor has two sets of identical windings which are connected in parallel with each other. The two identical windings are energized in a sequence to produce the reduced starting current and the reduced starting torque.
Dual voltage motor:
The dual voltage motor has two sets of windings (not identical) which are connected either in parallel or in series. When the 230/460-volt motor operates with the part winding starter, it is intended to connect the two sets of windings in parallel (voltage ratio is 1:2). An each set of windings is connected either in Y or delta connection.
The dual voltage motor can operate with different power supply voltages. When the dual voltage motor’s two sets of windings are connected in parallel, the motor can operate with low voltage connection. When the windings are connected in series, the motor can operate with high voltage.
230/460-volt motor as a part winding motor:
230/460-volt dual voltage motor can be used as a part winding motor with low voltage connection. At the starting of the motor, the low voltage supply is connected to the one set of winding. As soon as the motor reaches to the normal speed, apply the power to the other set of winding (the other winding from the parallel windings) in the running conditions for the normal running operation of the motor. The motor runs with reduced starting current and the reduced starting torque after both the windings are energized in a sequence.
The part winding starter is a reduced voltage starter and used in the starting process of the 230/460-volt part winding motor.
Refer to Figure 28.3 in textbook where the 230/460-volt motor can be used as a part winding motor with low voltage connection. One set of winding terminals
Figure 1 shows the low voltage connection of a part winding motor.
Conclusion:
Thus, the 230/460-volt motor can be used as a part winding motor.
Want to see more full solutions like this?
Chapter 28 Solutions
Electric Motor Control
- Please answer all You and your crew have made it through the night and the day has brought more warmth. After searching the industrial site, you find an abundant amount of fuel to run the generators to keep you warm. You also find a memory card labelled “cure”, but your cell phone battery is dead. First things first, you will need to stay safe as the zombies continue to hunt you in your current location. The industrial site is surrounded by a metal chain-link fence. You decide you will electrify the fence to keep the zombies from scaling it. But the output voltage from the generators is not high enough to really deter them. You would like to apply around 10 kV to the fence (AC or DC, at that voltage it doesn’t really matter). You find a transformer that you can use but it only has a turn ratio of 10. You find some diodes and capacitors and construct the circuit shown in Figure 3 with the intention of hooking Vout to the fence. 1. Perform a circuit JS simulation, displaying…arrow_forward2. A three-phase transformer connection Yy, 2000 kVA, 20000/6000 V has the relative short-circuit voltages Ecc = 7% and ERcc = 1.7%.It is known that when empty this transformer consumes a power Po = 12.24 kW. Calculate:a. Parameters Zcc, Rcc, Xcc, referring to the primary and EXcc.b. If the transformer is connected at rated voltage and feeds a load of 1800 kVA, fp = 0.8, calculate the line voltage at the secondary.c. The maximum apparent power, and the maximum efficiency fp = 0.8 inductive. Perform the exercise by the collaborators and without using artificial intelligence pleasearrow_forward1. A three-phase transformer with Yd connection, 300 kVA, 12000/220 V, has been short-circuit tested on the high voltage side giving the following results: 750 V, 14.434 A, 10838 W.When the transformer is connected to nominal voltage without load it consumes 5400W. Calculate:to. Relative voltages of short circuit high voltage side: εcc, εRcc and εXcc.b. The voltage in the secondary when the transformer is connected to nominal voltage and feeds a load of 200 kW fp = 0.8 in delay.c. Apparent power of maximum efficiency and maximum efficiency with fp = 0.95 inductive. Please solve for one of the collaborators and without using artificial intelligencearrow_forward
- Find value of load resistance RL that can be connected to terminals a-b for maximum power transfer. Also calculate the maximum power that can be delivered to load RL.arrow_forwardA modulating signal f(t) is bandlimited to 5 kHz is sampled at a rate of 15000 samples/sec. The samples are quantized into 128 levels. Calculate the transmission bandwidth if the following modulation types are used for signal transmission: 4- ASK 5- 8-PSK 6- FSK with Af = 25 kHzarrow_forwardDraw the Split-Phase Manchester code for the follow ng binary data: (1001010110)arrow_forward
- 11.54 For the network in Fig. 11.73, find the complex power absorbed by each element. 120/-20° V Figure 11.73 For Prob. 11.54. | + -1302 j5Q 4 Ωarrow_forwardFind a value of RL that can be connected to terminals a-b for maximum power transfer. Then, calculate maximum power that can be delivered to load RL.arrow_forwardA modulating signal f(t) is bandlimited to 5 kHz is sampled at a rate of 15000 samples/sec. The samples are quantized into 128 levels. Calculate the transmission bandwidth if the following modulation types are used for signal transmission: 4- ASK 5- 8-PSK 6- FSK with Af = 25 kHzarrow_forward
- A modulating signal f(t) is bandlimited to 5 kHz is sampled at a rate of 15000 samples/sec. The samples are quantized into 128 levels. Calculate the transmission bandwidth if the following modulation types are used for signal transmission: 4- ASK 5- 8-PSK 6- FSK with Af = 25 kHzarrow_forwardDon't use ai to answer I will report you answerarrow_forwardjan G(f) f Sketch the spectrum of g(t), which has a maximum frequency of 5 kHz, if it is sampled at the following sampling frequencies: 7 kHz, 10 kHz and 15 kHz. Indicate if and how the signal can be recovered at each sampling frequency.arrow_forward
- Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage LearningElectricity for Refrigeration, Heating, and Air C...Mechanical EngineeringISBN:9781337399128Author:Russell E. SmithPublisher:Cengage Learning


