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In a proposed design for an electric automobile, the shaft of a four-pole three-phase induction motor is connected directly to the drive axle; in other words, there is no gear train. The outside diameter of the tires is 20 inches. Instead of a transmission, an electronic converter produces variable frequency three-phase ac from a 48-V battery. Assuming negligible slip, find the range of frequencies needed for speeds ranging from 5 to 70 mph. The vehicle, including batteries and occupants, has a mass of 1000 kg. The power efficiency of the dc-to-ac converter is 85 percent, and the power efficiency of the motor is 89 percent. Find the current taken from the battery as a function of time while accelerating from 0 to 40 mph uniformly (i.e., acceleration is constant) in 10 seconds. Neglect wind load and road friction.
Design of an Operational Amplifier Using PSpice - Differential input impedance greater than 100 kQ and to obtain a set of output characteristics for the two transistor types to be used in this experiment.
We would like to monitor the first two least significant bits of PORTB (use masking technique). Whenever both of these bits are set, switch all LEDs of Port A on for one second. Assume that the name of the delay subroutine is DELAY.
Write the theoretical Power Spectral Density for a BPSK signal with shift angle of 180 degrees, carrier of 25 kHz and bit rate of about 1 kHz that has been spread by a PN sequence with a bit rate of about 100 kHz. State it or derive it.
Design a handheld hair dryer with the following specifications and realistic constraints: 1. It uses a 60 Hz, single-phase, 120 V r.m.s sinusoidal voltage source. 2. It has three settings low, medium, high.
A sequential circuit has two JK flip-flops and , one input , and one output . The flip-flop input equations and circuit output equation are: Ja=Bx Ka=x' jb=A'x Kb=A+Bx; Y =Ax'+Bx'
You are designing a general purpose integrated circuit oscillator that will operate at various frequencies, based on the external reactances the user supplies. You expect that the IC will be used as a fixed frequency oscillator in portable equipm..
An infinitly long line charge (ρl = 2lπ nC/m)lies along the z-axis. An infinite area sheet charge(ρs= 3 nC/m2 lies in the x-z planeat y = 10m. Find a point on the y-axis where the electric field intensity is zero.
Draw a circuit that operates as follows- When power is applied to the circuit and before any push buttons are pressed all relays are de-energised and lamps extinguished.
The DC machine rotates at 1500 RPM and it delivers rated current at rated terminal voltage. The field winding is connected to a 120 V supply. Find the value of the field current and the value of R (field control resistance) required.
Design Negation (Two's complement),We mentioned that one can obtain the negative of any number using only inverters and an adder. The function that performs this conversion is -p = p +1 where p iscalled the One'sComplement of P
The sawtooth voltage pulse Vs(t) = 40t[u(t) - u(t-0.1)]V is applied to the series combination of R = 2Ω and C =0.05F. Find the two instants of time at which the capacitor voltage is 1 V.
a) Assume B1 = ax2 - ay10(mT), find B2 and the angle that B2 makes with the interface. b) Assume B2 = ax10 +ay2(mT), find B1 and the angle that B1 makes with the normal to the interface.
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