EMA4 Coils
Dear Mr. Pranav,
The information you posted above originally comes from Mr. Allen Francour of Yack, B.C. when he dissasembled the EMA4 motor that he bought from Norm Wooten in about 2004. However, keep in mind, this motor was re-wound in 1981 by Nelson Schlaft (E.V. Gray's technician at the time) who was modifying all of the existing motors to run on classical 5KV DC from a 25 KVA power supply that he had built. All this power came from a 100 amp 240VAC wall panel and not from wet cell batteries or some kind of non-classical converter. The apparent intent was to make the surviving motors run so that promotion vidieos could be made. According to Mr. Schlaft the original magnet wire was of a much smaller gauge (say #24 AWG) not the #14 AWG that he used to increase the current flow. It has also been proposed that copper coated insulated iron wire was used and not plain copper magnet wire. But we will never know for sure.
The rest of the information about the design of the core is still valid and leads us to an interesting operating process. My historical research and conclusions point to the idea that there were HV arcs struck between the electromagnet cores of the stator and the rotor. This is the reason for all the HV isolation of the electromagnets and the unique design of the Nylon pole pieces on the ends of the electromagnets. Also, the face of the electromagnets are much wider than what is encountered in classical motor design. This was intended to protect the windings from the arcs being struck and stretched.
The original purpose of this internal arcing switching process was to conserve the stored energy in the capacitor by inturupting the current flow when the electromagnets were far enough apart. It turned out that something more was going on. Mr. Hackenburger spent the rest of his life attempting to re-discover what was going on in this stretched arc process, but he ran out of money and health.
Spokane1
Originally posted by pranav2010
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The information you posted above originally comes from Mr. Allen Francour of Yack, B.C. when he dissasembled the EMA4 motor that he bought from Norm Wooten in about 2004. However, keep in mind, this motor was re-wound in 1981 by Nelson Schlaft (E.V. Gray's technician at the time) who was modifying all of the existing motors to run on classical 5KV DC from a 25 KVA power supply that he had built. All this power came from a 100 amp 240VAC wall panel and not from wet cell batteries or some kind of non-classical converter. The apparent intent was to make the surviving motors run so that promotion vidieos could be made. According to Mr. Schlaft the original magnet wire was of a much smaller gauge (say #24 AWG) not the #14 AWG that he used to increase the current flow. It has also been proposed that copper coated insulated iron wire was used and not plain copper magnet wire. But we will never know for sure.
The rest of the information about the design of the core is still valid and leads us to an interesting operating process. My historical research and conclusions point to the idea that there were HV arcs struck between the electromagnet cores of the stator and the rotor. This is the reason for all the HV isolation of the electromagnets and the unique design of the Nylon pole pieces on the ends of the electromagnets. Also, the face of the electromagnets are much wider than what is encountered in classical motor design. This was intended to protect the windings from the arcs being struck and stretched.
The original purpose of this internal arcing switching process was to conserve the stored energy in the capacitor by inturupting the current flow when the electromagnets were far enough apart. It turned out that something more was going on. Mr. Hackenburger spent the rest of his life attempting to re-discover what was going on in this stretched arc process, but he ran out of money and health.
Spokane1
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