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A 2000 hp, 1.0 power factor three phase Y connected 2300V, 30 Pole, 60Hz; synchronous motor has a synchronous reactance of 1.95 ohms/phase. For this problem all losses may be neglected. Compute the maximum torque in N.m which the motor can deliver if it is supplied with power from a constant fequency, constant voltage, 3 phase source, commonly called an infinite bus, and its field excitation is constant at the value which would result in 1.0 power factor at rated load.
If you have a 30 VDC - 4A power supply and need to power two 24VDC - 0.8A MFC (mass flow controller), create a circuit that divide the voltage and can handle the power.
1) What is the dynamic range for an 8-bit ADC 2) A device that responds to a small current or voltage change by activating a mechanical switch allowing a larger amount of current flow is a: a) transistor. b) transducer. c) solenoid. d) relay.
find the complete functions, p(t) and w(t) supplied by the element, not just a number, and graph p(t) and w(t). Choose appropriate intervals of time for your graphs. Assume that both v(t) and i(t) are zero for t
A coaxial cable has a loss of 5.6 dB at a frequency f. A signal at f has ans rms amplitude of 1.7 mV at the cable input. What is the rms amplitude after it has traveled the length of the cable
A current of 5A flows through a resistor connected in series with choke coil. It is supplied with 250 V , 50Hz supply . If potential difference across resistor is 125 and across choke coil is 200 volt .
The maximum voltage that James can apply to this capacitor is limited by Vmax = Kd, where K is the breakdown strengh of the dielectric. deriven an expression for the maximum energy that can be stored in this capacitor in terms of K and the volume ..
A power company supplies 75 kW to an industrial load. The load draws 120 Arms from the transmission line. If the load voltage is 440 Vrms and the load power factor is 0.8 lagging, find the losses in the transmission line.
4 resistors are connected in electrical parallel. R1=2 OHM, R2= 4 OHM, R3= 6 OHM, R4= 8 OHM. if this parallel resistor combination is placed across an ideal current source = 3A.
Earth-based 802.11a or 802.11g wireless LAN standards transmit data using a bandwidth of 16.56 MHz. What is the theoretical thermal noise level (in V) in an ideal receiver operating with an input impedance of 50 ohms
A 10m diameter cylindrical tank is emptied by a constant outflow of 1 m3 /min. A two position controller is used to open and close a fill valve with an open flow of 3 m3 /min. For level control the neutral zone is 1m and the setpoint is 10m.
Sketch a time diagram similar to Figure 3.22 illustrating what happens when a frame gets lost between the sender and the receiver. It should be clear from your diagram how the protocol handles this situation.
How much torque is this motor producing. What is the torque angle. How near is this value to the maximum possible induced torque of the motor for this field current setting.
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