Which method can be used to improve the efficiency of a single-phase motor?

Implementing regular maintenance routines significantly improves the efficiency of a single-phase motor by ensuring that all components are operating optimally. Regular maintenance helps identify and rectify issues such as dirt accumulation, mechanical wear, and electrical connections that may degrade performance over time. By keeping the motor clean, well-lubricated, and ensuring that electrical connections are secure, the motor can run more smoothly and effectively, minimizing energy losses and enhancing overall efficiency.

While other methods suggest different technical adjustments, they might not directly address the underlying operational factors that can lead to inefficiency. For instance, lower voltage supplies could potentially lead to underperformance rather than efficiency improvement. Higher capacitance values can affect the motor's capacitance characteristics, but improper implementation might cause more issues than benefits. Decreasing winding resistance generally relates to a design change rather than a maintenance issue, and may not always be feasible without complete rewinding or redesigning of the motor. Regular maintenance stands out as a practical and continuous way to ensure optimal motor efficiency.