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A 2-pole, 3 phase (PMAC) brushless-dc motor drive with a torque constant Kt and the voltage constant Ke being 0.5 in MKS units and the synchronous inductance is 15 mH and supplying a torque load TL of 5 Nm at speed of 5,000 rpm in a balanced sinusoidal steady state,draw the phasor diagram showing Va and Ia with the calculated values.
The mobility of electrons in certain semiconductor is 1400 cm2/ (volt x sec). At room temperature (T=300K) calculate the diffusion length of electrons. What are the assumptions used in low-level injection of carriers
A coil made of 150 turns of copper wire wounded ona cylindrical coil . If that means radius of the turns in 6.5mm and the diameter of the wire is 0.4mm, calculate the resistance of the coil.
a six sigma black belt found that in a random sample of 140 printed circuit boards, 18 are defective. At the 5% level of significance, test that the percentage of defective boards is 10% against the alternative which is greater than 10%.
A HCS12 embedded timer is in PWM mode. If the E-clock is 24 MHz, the output period is 35.33 microsec, and a scale factor of 4 is used, what is the value loaded into PWPER
Design a circuit with a 4-bit BCD input A,B,C,D that produces an output W,X,Y,Z that is equal to the input +6 in binary. You can use AND, OR, and INVERTER. Draw the gate level circuit
A 440 Vrms (line to line voltage) three phase induction motor runs at 1150 rpm driving a load requiring 15Nm of torque. The line current is 3.4 at a power factor of 80% lagging. Find the input power in Kw, The output power in Kw, and the efficiency..
For the following differential equation, determine the Laplace transform, and put into transfer function form (note, one pole is at s = -3): (d^3 x(t)/dt^3) + (6 d x(t)/dt^2) +(11 dx(t)/dt) + 6x(t) = 6r(t) + (6 dr(t)/dt)
A single-phase, 100-kVA, 1000:100-V, 60-Hz transformer has the following test results: Open-circuit test (FIV side open): 100 V, 6 A, 400 W Short-circuit test (LV side shorted): 50 V, 100 A, 1800 W 1)Determine the voltage regulation at 75% of the rat..
A parking garage charges a $ 5.00 minimum fee to park for up to three hours and an additional $ 1.00 per hour for each hour over the hours. the maximum charge for any given 24 hours period is $ 2.00.
When the scope probe is properly calibrated, it can be modeled as a 9[M Ohm] resistor in parallel with a capacitor having a capacitance l/9th that of the oscilloscope input capacitance.
An RL circuit takes a current of 7A that lags behind the 231-volt source by 35 electrical degrees. Calculate the power factor, impedance, resistance and inductance of the circuit.
For a face centered cubic, the volume of a conventional unit cell is a^3 Find the volume of a fcc primitive unit cell with three basis vectors: (0,0,0 --> a/2,0,a/2) and (0,0,0 --> a/2,a/2,0), and (0,0,0 --> 0,a/2,a/2)
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