Use capacitors or shading coils to create starting torque.
Single-phase supply gives a pulsating field with no starting torque, so split-phase, capacitor-start, capacitor-run or shaded-pole designs create a rotating component. Used in fans, pumps and appliances up to a few kW.
A ceiling fan uses a capacitor-run motor.
Single-phase motors are used in homes, where three-phase supplies are unavailable, so starting methods matter for small appliances and pumps.
Use capacitors or shading coils to create starting torque.
Single-phase motors are used in homes, where three-phase supplies are unavailable, so starting methods matter for small appliances and pumps.
A single-phase field pulsates and does not produce a rotating field, so the rotor needs help to start, which the capacitor or shading coil provides.
It uses a capacitor in series with a starting winding to create a phase shift that gives strong starting torque.
Typical applications include starting a refrigerator compressor on a single-phase supply, choosing a capacitor-start motor for a workshop tool and selecting a shaded-pole motor for a small fan.
Study "Synchronous machines" first (topic 61 of 106 in Electrical Engineering). It covers the groundwork this topic builds on.
Auxiliary winding. Centrifugal switch. PSC motors for fans.
A ceiling fan uses a capacitor-run motor.
The next topic is "Stepper and BLDC motors", which builds directly on this one.
It is classed as Intermediate in Electrical Engineering (topic 62 of 106). It is an intermediate topic. Work through the beginner topics in Electrical Engineering first.
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