What part of the transformer provides the connection for the ends of the armature coils to the commutator?

The part of the transformer that provides the connection for the ends of the armature coils to the commutator is known as the connection plate. This component plays a crucial role in ensuring that electrical connections are made effectively, allowing the current generated in the armature coils to be directed to the commutator.

The connection plate is designed to facilitate a secure and reliable means to interface the armature's windings with the commutator, ensuring that electricity can flow efficiently and without interruption. Its function is essential for the proper operation of the transformer and its overall performance.

The other terms refer to different components or functions. For instance, a terminal block is used for organizing and connecting multiple wires together but is not specifically designed for connecting armature coils to a commutator. The riser is usually associated with the vertical components in elevator systems and does not directly relate to the connection of coils. Lastly, winding connections refer to the various connections within the windings but do not specifically indicate the connection to the commutator, which is distinct.