Generally modern type mechanical gearbox have efficiencies depends on size and speed of rotation
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- a). If it is known that the total traction force in the Bung Tomo circuit is 231.9N, what is the required motor torque if the radius of the wheel is 0.2475 m?EE 422 - AC and DC Machinery Solve the following problems completely. Box and Round-off your final answer in nearesttwo decimal places. 1.A compound motor develops a torque of 271 lb-ft when it is operating at 1200 rpm, under which condition its armature current Ia is 215 amperes. What will be the developed horsepower of the motor if the load is increased so that it slows down to 1,1120 rpm in which case Ia changes to 238 amperes and the total flux increases by 8 percent? answer: 69.1hpExplain briefly the advantages and disadvantages of tractor.
- Can you please provide a clear, long and readable solution for this problem about rotational mechanical systems with gears? Thanks!!!Q24) A shunt generator running at 1000rpm supplies 22KW at shunt field a terminal voltage of 220V.The resistance of the armature, shunt field are 0.05Ω and 110Ω respectively. The overall efficiency at the above load is 88%. i) Calculate the copper loss. ii) Calculate the Iron and friction losses.A 6-phase ∆-connected 1600 V (line-to-line), 150 kW, 50 Hz, six-pole induction drive is used in an electric car. The drive has the following parameter values in Ω/phase referred to the stator: R1 =0.334 Ω R2 =0.168 Ω Rm1 = 125 Ω X1 = 0.273 Ω X2 = 0.287 Ω Xm1 = 16.78 Ω The total friction, windage, and core losses may be assumed to be constant at Prot =773 W, independent of load. For a slip value of s=0.015: a) Draw the equivalent circuitb) Compute the speed, output torque, power and stator currentc)Determine the power factor and whether leading or lagging d)Calculate the efficiency when the motor is operated at rated voltage and frequency.
- A 220 V shunt generator develops a brake horsepower of 64 HP. If the armature and shunt resistances 0.02 and 55 ohms respectively and the iron and friction losses amount to 1750 W, find the full-load current.SOLVE THE PROBLEM, SHOW YOUR COMPLETE SOLUTION AND MAKE SURE THAT THE FINALS ANSWERS ARE IN 4 DECIMAL PLACES. A shunt generator delivers 450A at 230V and the armature resistance is 0.03 0. Calculate the shunt field resistance if the generated emf is measured at 243.6V.Q1. A 200V shunt generator has an armature resistance and shunt field resistance are 0.05 2 and 200 respectively. The iron and friction losses and total Copper loss (Cu) are 1000 W and 2000 W respectively. (brush loss may be ignored) If the generator runs to supply a load finds: (2) E.M.F. generated (b) Commercial, mechanical and electrical efficiencies.
- 13. You're working on a PM task for a gearbox, and you need to clean the breather. Where is the breatherlocated?A. The bottom of the gearboxB. The side of the gearboxC. The top of the gearboxD. Inside the gearboxA 12-phase ∆-connected 3200 V (line-to-line), 12,000 kW, 50 Hz, twelve-pole squirrel-cage induction drive is designed for electric vehicle use. The drive has the following equivalent parameter values in Ω/phase referred to the stator: R1= 0.697 Ω R2= 0.328 Ω Rm1 = 226 Ω X1 = 0.549 Ω X2 = 0.456 Ω Xm1 = 31.573 Ω The total friction, windage, and core losses are assumed to be constant at Plosses=1156 W, independent of load.a)Draw the equivalent circuit for this drive and show the relevant parameters on the circuit.For a slip value of s = 0.032 and using the above equivalent circuit parameters, determine: b) The stator current and the power factorc) The synchronous speed and the rotor speed for this drived) The torque generatede) The input power for this operating conditionf) The efficiency when operated at rated voltage and frequencyg) Considering the design of this motor, state if it is possible to start this drive with a slip ring starter. Give reasons to justify your answerQ51 Which NEC table is used to determine the full-load current of a torque motor? Select one: A. NEC TABLE 430.6(B) B. NEC TABLE 430.7(B) C. NEC TABLE 430.24 D. NEC TABLE 430.22