What is the maximum width of the bands placed on the end windings of induction machines and high speed dc machines?

The maximum width of the bands placed on the end windings of induction machines and high-speed DC machines isn’t specified in a one-size-fits-all dimension due to the variations in design and application requirements of different machines. The dimension depends on several factors, including the size of the machine, the operational speed, the materials used for the banding, and the mechanical forces (centrifugal forces) that the end windings are subjected to during operation. Generally, the design is customized to ensure the structural integrity of the windings at the highest operational speeds, with considerations for thermal expansion, vibration, and other mechanical stresses.

In practice, manufacturers use detailed calculations and tests to determine the appropriate banding dimensions for a particular machine. These calculations would consider the operational stress factors, material properties (such as tensile strength), and safety factors to ensure reliability and durability over the machine’s operational life.

For a specific type, make, or model of an induction machine or high-speed DC machine, consulting the manufacturer’s guidelines or engineering design documents would provide the most accurate information regarding the maximum width of the bands on the end windings.