Single Phase Motor

About Single Phase Motor

Heres a clean, practical description of a Single Phase Motor you can use for product info, catalogs, or general understanding:

Single Phase Motor Description

A single phase motor is an electric motor designed to operate on a single-phase AC power supply, which is the standard electrical supply available in most homes, small shops, and light commercial buildings. These motors are widely used for low to medium power applications such as water pumps, fans, compressors, washing machines, and small machinery due to their simple wiring, affordability, and easy availability of power.

Unlike three-phase motors, a single-phase motor cannot produce a rotating magnetic field on its own. To start rotation, it uses a starting mechanism such as:

• Capacitor-start / capacitor-run

• Split-phase (resistance start)

• Shaded-pole (for very small loads)

Once started, the motor continues to run on the single-phase supply, delivering smooth power for everyday equipment.

Key features

• Operates on single-phase AC (typically 110120V or 220240V, region-dependent)

• Simple construction and easy installation

• Available in various starting types (capacitor start/run, split-phase, shaded-pole)

• Compact, lightweight, and cost-effective

• Suitable for intermittent or continuous duty (model-dependent)

Typical applications

• Water pumps (monoblock pumps, jet pumps)

• Fans and blowers

• Washing machines

• Small compressors, grinders, drills

• Household and small workshop equipment

Advantages

• Works with standard household electricity

• Lower upfront cost than three-phase motors

• Easy to maintain and widely serviceable

• Good choice for small to medium power needs

Limitations

• Lower efficiency and starting torque compared to three-phase motors

• Not ideal for heavy industrial loads

• Limited power range (commonly up to ~23 HP for typical domestic use)

Common specifications (varies by model)

• Power: 0.25 HP to ~3 HP (some designs higher)

• Voltage: 110120V / 220240V

• Frequency: 50 Hz or 60 Hz

• Speed: 14003000 RPM (2-pole or 4-pole motors)

• Enclosure: TEFC / ODP (depending on environment)