Search & Filtering
Design an ideal Hilbert transform with frequency response H(e^jw)=-j for 0<=w<=π and j for -π<w<0. Use hamming window for N=7. (Don't use MATLAB code)
A balanced Δ (delta) connected source has an internal impedance of 0.018+j0.162 Ω/phase. At no load, the terminal voltage of the source has magnitude of 380 VLL. The source is connected to a Δ (delta) connected load, having an impedance of 7.92+j6.35 Ω/phase through a distribution line having an impedance of 0.074+j0.296 Ω/phase. a) Draw the single phase equivalent circuit of 3-phase system b) Calculate the three line currents c) Calculate the phase currents of the source d) Calculate the magnitude of the line voltage at the terminals of the source
A single-phase asymmetrical semi-converter feeds an R-L load with R=50 Ω and a large L= 10 mH so that load current is constant. The source voltage is 230 V, 50 Hz. For a firing angle of 600, determine: (i) Average value of output voltage and output current. (ii) Average and rms values of diode, thyristor and source currents.(iii) Input power factor.
Design the buck and buck-boost converters for following specifications: Vin = 24 V, Switching frequency = 25 kHz, Vo = 10 V, Po= 48 W. Inductor current ripple is 10 % of load current and capacitor voltage ripple is 1% of output voltage. Assume necessary data if required.
The work required to compress a gas reversibly according to PV1.3 =C is 68KJ. if there is no flow determine the change in internal energy, enthalpy and heat if the gas is CO2
The modern PLC uses a wide range of networks to control devices.
Using research, you are to compare the key differences between Profibus and Profinet networks highlighting key differences.
Your report should include important criteria such as standards and protocols.
A capacitor consists of two similar square aluminium plates, each 10 cm × 10 cm mounted parallel and opposite to each other. What is their capacitance in μ F when distance between them is 1 cm and the dielectric is air
Modern programmable controller systems use a wide range of networks which are control by standards and protocols. One of these modern programmable controllers is the Siemens S7 1200 which uses the Profinet network.
Describe the network and explains the relevant standards and protocols used.
a) You are required to examine the three main types of communication media (ie twisted pair, coaxial and fibre optic cables) and explain using diagrams the advantages and disadvantages for each type.
b) Select one of the cable from the list and explain how the cable selected can be used for a PLC application.
c) Explain using diagrams, the construction of three types of connectors which are used in PLC communications and select a suitable PLC application for each.
d) Opto – isolator are used in some PLC devices for communication purposes. Explain using diagrams how the Opto-isolator works and states at least three advantages for using Opto – isolators in PLC applications.
PLCs are very useful devices that are used for a wide variety of applications such as controlling the operation of the automatic roller door to the entrance of KPL Foods warehouse in assignment 1. The equipment poses a number of health and safety issues which must be taken into consideration to prevent harm.
a) Describe some of the health and safety issues which should be considered.
b) Identify at least 4 relevant Health and Safety legislations which should be observed when working with programmable controlled equipment.
