Can a Series Capacitor Create Phase Alignment in DC Shunt Universal Motors?

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SUMMARY

The discussion centers on the feasibility of using a series capacitor to achieve phase alignment in DC Shunt Universal Motors. It highlights that Universal Motors have field windings in series with the armature, which leads to issues with torque production on AC supply due to phase angle differences. The proposal suggests that a properly valued series capacitor could align the currents in phase and reduce the impedance of the shunt path, potentially improving torque characteristics. Participants are encouraged to conduct simulations or experiments to validate this configuration.

PREREQUISITES
  • Understanding of Universal Motors and their operational principles
  • Knowledge of AC and DC electrical systems
  • Familiarity with capacitive reactance and impedance in electrical circuits
  • Experience with simulation tools for electrical engineering, such as LTspice or MATLAB
NEXT STEPS
  • Research the impact of series capacitors on phase alignment in electrical circuits
  • Learn about simulation techniques for modeling Universal Motors using LTspice
  • Investigate the effects of inductive reactance in shunt fields of DC motors
  • Explore experimental setups for testing phase alignment in DC Shunt Universal Motors
USEFUL FOR

Electrical engineers, motor control specialists, and researchers interested in optimizing the performance of DC Shunt Universal Motors through innovative configurations.

djsourabh
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We know that Universal Motors have field winding always in series with the Armature.They do not have field in shunt because of shunt fields' inductive reactance & they will produce negligible torque on AC supply.
Also because of different phase angles of currents in series & shunt path, the 'DC Shunt Universal Motor' may not even have unidirectional torque.(since the field & Armature should be 'in phase' so that torque is unidrectional & having less ripples.)
So my quuestion is "what if we use a series capacitor having such a value so that both the currents are in phase ? And capacitor also will reduce the impedance of shunt path."
will this type of configuration be feasible?
 
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djsourabh said:
We know that Universal Motors have field winding always in series with the Armature.They do not have field in shunt because of shunt fields' inductive reactance & they will produce negligible torque on AC supply.
Also because of different phase angles of currents in series & shunt path, the 'DC Shunt Universal Motor' may not even have unidirectional torque.(since the field & Armature should be 'in phase' so that torque is unidrectional & having less ripples.)
So my quuestion is "what if we use a series capacitor having such a value so that both the currents are in phase ? And capacitor also will reduce the impedance of shunt path."
will this type of configuration be feasible?

Can anybody perform simulations/do experiments or help me in the same for above problem?
 

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