Briefly explain the effect of the torque taken by the device that loads the motor on the variation of the torsional work and the smoothness of the motor.
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Briefly explain the effect of the torque taken by the device that loads the motor on the variation of the torsional work and the smoothness of the motor.
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- Mr. Ahmed is having Nissan patrol 4-wheel drive car. He used to take off road drive to reach his house. So frequently he observes vibration in his car while driving it at particular speed. He took his car to a workshop. The service personal has recommended for static balancing of the wheels of the car in order to cancel the vibration. Identify the condition from the following that must be satisfied to achieve static balancing. a. The net static force acting on the shaft is equal to zero. b. The net couple due to static forces acting on the shaft is equal to zero. c. Both (a) and (b). d. None of the given answers.Parameter Value Unit Remarks Inertia 36 tonne m? Damping 20 N-m.s Train mechanisms only Load Torque 117.720 kN-m A train has the effective total properties in the preceding table. It is desired to be able to completely stop the train from full speed in 15 seconds, while maintaining rated supply to the field. 1. Find the number of DC motors needed to run and decelerate the train without any motor being subjected to more than its rated capabilities. Assume uniform load distribution; identical machine models, terminal voltages, and controls. 2. Derive an expression for the armature current la(t) in each machine. 3. Derive an expression for the instantaneous terminal voltage Va(t) required for the controllers. 4. Due to practical limitations, it is often necessary to stop regenerative braking once one of the following occurs: zero-speed, zero Va(t), or zero la(t). Determine the angular speed (in rpm) at which this occurs.The tensions in the tight and slack side of a belt drive system are 1850 N and 525 respectively. If the belt speed is 8 m/s what power in kW will be transmitted with no slippage
- Please don't provide handwritten solution .....Define the Spring Work by a differential?Question 2 Beli vifth Slack side Motor (imprut) Tight side Beli thickpess\ Centre distance Figure 2 Figure 2 shows an open flat belt drive connected to a motor and a pulley. The motor transmits 20 kw to the connect pulley of 450 mm diameter and is rotating at 850 r/min to a second pulley rotating at 400 r/min. The distance between pulley centres is approximately 2 m. The belt is 6 mm thick and has a density of 970 kg/m. The maximum stress in the belt is not to exceed 2,7 MPa. The coefficient of friction for both pulleys is 0,3. Determine: 2.1. The diameter of the second pulley. 2.2. The length of the belt. 3.3. The width of the belt taking centrifugal tension into account.
- The governing equations of a mass-spring vibrating system with two masses are: yi' = -2y1 - y2 y2 = -y1 - 2 y2 Find frequencies and relative displacements of the vibrating system.Еxamples 1. When there is a reduction in amplitude over every cycle of vibration, then the body is said to have G free vibration forced vibration damped vibration none of the mentioned 2. The system of figure has degrees of freedom. Fork Joint - Two Three Spring Four Slider Five fromi need the answer quickly
