Single-Layer Windings

All the conductors in one slot are connected in series with all the conductors in another slot to form a single-layer coil. You set the number of winding layers in the Winding properties window, Winding tab. Comparing to double-layer type, this type is characterized by

• Number of coils halved;
• No need for insulation between layers, therefore higher slot filling factor;
• Coil pitch depends on the connection, and is not adjustable;
• Being widely used in small capacity electric machines.

According to different layouts of the end winding, single-layer windings are classified as chain-, lap-, concentric- and crossed-types.

Chain-Type Windings

The name single-layer chain-type is from the linked chain-like developed winding diagram. For a chain-type winding, every coil set has only one coil.

Half-Coiled Chain-Type Winding

An example of three-phase six-pole, 18-slot single-layer half-coiled chain-type winding is shown in the following figure.

Whole-Coiled Chain-Type Winding

An example of three-phase, four-pole 24-slot single-layer whole-coiled chain-type winding is shown in the following figure.