Electrical Engineering XYZ MCQs
Which braking is not possible in case of series motor:
- Counter current braking
- Rheostat braking
- Regenerative braking
- Dynamic braking
Correct answer: 3. Regenerative braking
Explanation: The major disadvantage to regeneratively braking in this fashion is that the braking energy is only recoverable by the other motor(s) with their DC busses paralleled, and only at the exact same time one or more of those motors are braking.
Regenerative braking is one of the braking methods used for AC Induction Motors Braking.
Regenerative braking takes the concept of dynamic braking one step further, in converting the DC bus over-voltage into usable AC power to be placed back on the AC line for other AC devices to use. Rather than regulate DC bus voltage via a shunt resistor switched on and off by a special transistor, a regenerative drive manages the same task by augmenting the bridge rectifier diode array with a set of six more power transistors, then switching those transistors on and off synchronously with the line voltage (the AC power source). Continue reading complete article on regenerative braking here.