Printed circuit board stator winding enhancements for axial field rotary energy device

An axial field rotary energy device, comprising:

• a printed circuit board (PCB) stator comprising PCB panels, each PCB panel comprises conductive layers, and each conductive layer comprises:
• coils and each coil has radial conductors;
• first conductive pads coupled to the coils in a first layer of the conductive layers;
• second conductive pads that are not coupled to the coils in the first layer, and the second conductive pads are coupled to coils in a second layer;
• a first portion of the radial conductors in the first layer are equally spaced apart in a circumferential direction;
• and
• a second portion of the radial conductors that is adjacent to the second conductive pads have a closer spacing than the first portion of the radial conductors to provide clearance for the second conductive pads.

An axial field rotary energy device, comprising:

• a printed circuit board (PCB) stator comprising PCB panels, each PCB panel comprises conductive layers, each conductive layer comprises coils, and each coil has end turns wherein the PCB stator further comprises:
• conductive pads coupled to temperature sensors, and each conductive pad is connected to a terminal through conductive traces;
• and
• a masking pattern that covers the conductive traces and forms barriers to prevent molten solder from bridging across adjacent ones of the conductive pads, and from running off on major surfaces of the PCB stator, and to prevent molten solder from bridging across adjacent ones of the terminals and from running off on the major surfaces of the PCB stator, wherein the masking pattern is non-conductive that avoids a short circuit of the terminal.