Comparing to some other motor, generator is the product with good profit, you can get repayment in short time to get back your investment.
For production, generator winding method is wave winding,wave winding is normally used in case of low current High voltage DC Machine.
What is wave winding?A coil side occupying under one pole is connected to the start of the coil side, which is in the same position under the next pole through back connection. The second coil side of this coil is connected forward to another coil side, under the next pole. The shape of the winding seems like the wave in regulation.
In this way, the winding is continued.
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Emily