SYNCHRO-SYM Technologies

 

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Retrofitted with the patented electric motor circuit and control architecture of SYNCHRO-SYM, the MAGNAX highly optimized electric propulsion motor power density can be doubled again, the cost halved again, and the efficiency increased again by simply removing the two very expensive (and “passive”) rare earth permanent magnet (RE-PM) disk assemblies of MAGNAX and then replacing the arrangement of RE-PMs with a similar concentrated “active” multiphase winding set arrangement (as the original MAGNAX stator active winding set) and brushlessly controlling the active winding set(s) with SYNCHRO-SYM's brushless real time emulation controller (BRTEC) instead of the MAGNAX electronic controller.

 

By retrofitting the same design, the same packaging, the same materials, and the same winding techniques as the original MAGNAX (while eliminating the extremely expensive and delicate RE-PM and the electronic control of MAGNAX), the performance comparison between the original MAGNAX and SYNCHRO-SYM is obvious and without possibility of manipulation by unsuspectingly comparing between different performance packaging, materials, design techniques, or performance specifications. It also shows SYNCHRO-SYM design, construction, and manufacturing are straight forward, SYNCHRO-SYM is without exotic components or materials, such as rare earth permanent magnets, and SYNCHRO-SYM is adaptable to legacy, off-the-shelf, or fielded electric machine systems.

 

By doubling the power rating of the original MAGNAX package with two similarly rated active winding sets (as the original single MAGNAX stator active winding set) that are on the rotor and stator, respectively, the resulting electric machine, now called SYNCHRO-SYM, contiguously and variably operates from sub-synchronous, such as from and including zero speed, to super-synchronous speed, such as at or above twice synchronous speed, with twice the "constant torque speed range" for a given frequency and voltage of operation as the original MAGNAX, which unquestionably equates to twice the power density, half the cost, and higher efficiency as the original MAGNAX. Since power density, cost, efficiency are always calculated with per unit of power rating, the dual active winding sets of SYNCHRO-SYM again show twice the power density, half the cost, and higher efficiency with twice the power in the same package as the original MAGNAX. Providing a truly symmetric (or dual ported) transformer circuit topology that naturally keeps airgap flux density constant with increasing torque current (in contrast to MAGNAX asymmetric transformer circuit topology), SYNCHRO-SYM shows at least twice the peak torque potential of MAGNAX (which most definitely provides a transmission-less propulsion system that MAGNAX can only suggests). The SYNCHRO-SYM conversion also provides "field weakening" for extended speed range. Although MAGNAX was used for this example, the same retrofit process can be similarly applied to virtually any other electric machine system.

 

 

NOTE: There are other engineering requirements for a practical retrofit of the axial-flux electric machine, such as MAGNAX...(READ MORE)

 

 

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