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Lambda 001 Motor Design
Part 5: The Lambda Motor is Born
In the picture you will find a full color cutaway of the Lambda motor design. Notice the highly extended pole with the full length copper Faraday. This is an extremely large piece of copper for in a loudspeaker motor. It serves all of the following functions.
(1) Lowers the gap flux movement no matter where the VC is located
(2) Quickly absorbs the heat from the relatively smaller VC and directs it into the large steel pole over a much larger area than the VC could have done on its own.
(3) For wide bandwidth use, the VC is always surrounding the same CORE no matter where the excursion has taken it. This is very important to understand as the VC is in fact an inductor, hence it is very sensitive to what the core material is at any given location.
(4) The copper effectively short circuits the inductance of the VC to an incredibly low level. This further lowers the influence of the inductance variance on the high frequency response of the driver. Also it forces a flatter phase curve for the driver. The main difference between electrostatics, ribbons, and VC driven drivers has always been the inductance. Here we can finally get a woofer to mate with these other drivers as closely as possible.
At first appearance it might all look quiet simple, but hopefully you will realize that every specification in material size and shape works together in a truly beautiful harmony. Every 0.001" has been stressed over, designed and redesigned in the above, now we offer it to you for pure musical enjoyment.