A Comprehensive Guide to Home Security Systems:

                                                             Universal Motor

• The single-phase series motor is a commidade type-type motors. If the palcority of the line terminals of reversed.dc series motor is a the motor will continue to run direction in the same
• The dc senter motor can also operate alternating current also. The direction of the torque developed in a de series motor is by both, field polarity and the detection of current fagh dracature hough by

(T∞Ta).

• When we give AC supply in motor the AC reversal from positive to negative an The polarity of negative to positive. Field winding current and armature current will be same, So, the polarity of induced flux will at same.
• The torque output is depend on the field Flux and armature current.

(T∞Ta).

• This means that the direction of the developed Torque will remain positive rotation will continue in same direction.

Nature of torque:

• The nature of the torque will be pulsating and the frequency will be twice the line Frequency.
• The nature of the torque will be pulsating and the frequency will be twice the line Frequency.

1. Due to the frequency hysteresis  and eddy current losses obtained and efficiency.
2. The power factor is low due to the reactance of field and armature winding
3. The sparking at the brusher is excessive In order to overcome these difficulties, the following modifications are reqs it in de sepier motorun.
4. To reduce the effect of armature reaction thereby improving commutation and reducingarmadre is use Commutator resistance, a compensating winding is used.

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