engineering recuitment JSSC JE Mock Test 2023 Electrical Machines Single Phase Motor and Special Machines Permanent Magnet DC Motor
Which of the following ststement is NOT CORRECT for permanent magnet DC motor?
1
It is fractional kW motor
2
It similar to an ordinary DC shunt motor except that its field is provided by permanent magnets instead of salient-pole wound-field structure
3
The only way to control its speed is to vary the armature voltage
4
It usually run on high voltage DC supply in order of 500 V