An electrical machine as shown in Figure 1 has the following information in its spec sheet: B=0.4T,l=0.5m,V_(B)=48V,r=0.25m,R=0.4 Omega , omega =500rad*s^(-1). Figure 1. Electrical machine a) Investigate if the machine is operating as a motor or a generator. Justify your answer using the parameters given above. [10 Marks] b) Based on Question 1a)

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An electrical machine as shown in Figure 1 has the following information in its spec sheet:

B=0.4T,l=0.5m,V_(B)=48V,r=0.25m,R=0.4\Omega ,\omega =500rad*s^(-1).

Figure 1. Electrical machine a) Investigate if the machine is operating as a motor or a generator. Justify your answer using the parameters given above. [10 Marks] b) Based on Question 1a), calculate the amount of current and power (input or output) of the machine at its current state. [5 Marks] c) Determine the minimum rotor speed to operate this machine as a generator. [5 Marks] d) Analyze the situation where the machine is operated as a motor with the current value of

3A

. Determine the speed of the motor in rpm.

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