Bi-plane wireless power transmission pad

A system for wireless power transfer, the system comprising:

• a first charging coil comprising one or more conductors arranged in a first winding pattern;
• a second charging coil comprising one or more conductors arranged in a second winding pattern;
• a multi-level ferrite structure comprising a main section at a first level, the main section comprising a top side along a plane, a first side portion and second side portion, a first side section at a second level and a second side section at the second level, the first side section and the second side section each comprising a bottom side positioned along the plane,
• wherein the first side portion of the top side of the main section is adjacent to a portion of the bottom side of the first side section along the plane and the second side portion of the top side of the main section is adjacent to a portion of the bottom side of the second side section along the plane, and
• wherein a portion of the first charging coil and a portion of the second charging coil are positioned adjacent to the top side of the main section in the first level along the plane and interior to where the first side section and the second side section are adjacent to the top side of the main section, a portion of the first charging coil is adjacent to the bottom side of the first side section in the second section along the plane and a portion of the second charging coil is adjacent to the bottom side of the second side section in the second section along the plane, wherein a signal injected in the first and second charging coils generates an electromagnetic field radiating in a direction away from the top side of the main section;
• and
• an inverter connected to the first and second charging coils, the inverter injecting a the signal in the first and second charging coils, wherein the injected signal generates an electromagnetic field radiating in a direction away from the top side of the main section.

An apparatus comprising:

• a multi-level ferrite structure comprising:
• a main section comprising a top side along a plane;
• a first side section;
• and
• a second side section, a bottom side of the first and second side sections positioned along the plane, wherein a portion of the bottom side of the first and second side sections are adjacent to the top side of the main section at opposite ends of the main section;
• a first charging coil;
• and
• a second charging coil,
• wherein a portion of conductors of the first charging coil and the second charging coil are adjacent to the top side of the main section, a portion of the first charging coil is adjacent to the bottom side of the first side section along the plane, and a portion of the second charging coil is adjacent to the bottom side of the second side section,
• wherein a signal injected in the first and second charging coils generates an electromagnetic field radiating in a direction away from the top side of the main section.