Question

A DC motor connected to a switch-mode dc-dc converter goes into regenerative braking mode. The average current being supplied by the dc motor is 20 A. In the equivalent circuit of the dc motor, Ea=103 V, Ra=0.19 Ohms, and La=4 mH. Calculate the average power flow into the converter. Round answer to the nearest whole number.

Answer 1

The correct answer is "2524 W".

Step-by-step explanation:

The given values are:

Ia = 20 A

Ea = 103 V

Ra = 0.19 Ω

La = 4 mH

According to KVL,

⇒
`V_0=E_a-I_aR_a`

On substituting the given values in the above equation, we get

⇒
`=103-(20)(0.19)`

⇒
`=103-3.8`

⇒
`=126.2 \ V`

Now,
`=126.2* 20`

The average power flow into the converter will be:

⇒
`P=V_0 I_a`

On substituting the given values, we get

⇒
`=(126.2* 20)`

⇒
`=2524 \ W`