How Does BEM Do This?

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Unlike the electric motor or generator system (EMS) of today with performance/price distinction always provided by the empirical application of legacy packaging techniques that show similar results if equally applied between EMS contestants, Best Electric Machine (BEM) is offering an entirely new and patented EMS technology, called SYNCHRO-SYM, that provides a verified 2-8x the performance/price of any other EMS with similar packaging techniques (less RE-PM). For example, if an EMS manufacturer advertised a notable 4 KW/Liter continuous power density with superior cost and efficiency, retrofitting the same package with SYNCHRO-SYM technology would immediately provide 8 KW/Liter continuous power density with better cost and efficiency. How does BEM do this? 

All of today’s electric motor or generator systems (EMS) have the non-optimal electromagnetic asymmetry of three essential components: 1) a “passive rotor” comprising an arrangement of either rare-earth permanent magnets (RE-PMs), slip-induction windings, reluctance saliencies, or DC field windings (e.g., conventional or superconductor), which cannot contribute additional torque or “working power” to the electromechanical energy conversion process but still consumes half of the electric motor loss, cost, and size while including the associated compounding effects of friction, induced harmonics, electronic control, and extraneous enabling components for consistently maintaining the rotating airgap magnetic flux density, 2) the universally essential “active stator” comprising a directly excited multiphase winding set (or active winding set), which determines the continuous torque rating and contributes “working power” to the electromechanical energy conversion process while consuming the other half of the electric motor loss, cost, and size, and 3) a typical remotely mounted, field-oriented controller (FOC) derivative for optimum, contiguously stable, constant-torque control to synchronous speed (i.e., maximum load speed or MLS). 

Note: In accordance with the EMS physics of a passive rotor, which is contrary to today’s anecdotal rhetoric, all asymmetric EMS contestants should show similar trade space of loss, cost, and size when optimally designed to the same parameters, such as “continuous” torque, synchronous speed, excitation frequency, voltage, cooling performance, airgap flux density, and effective airgap area, and optimally fabricated with similar packaging techniques, such as materials, winding arrangement, electronic components for control, thermal management, and axial-flux or radial-flux packaging. 

Note: Swapping the passive rotating (or linear moving) components with the active stationary components is an equally viable EMS configuration but rarely applied due to the complexities of provisioning multiphase electrical connections for directly exciting an active rotating body.

Note: The outlying DC (or universal) EMS is an asymmetric EMS comprising an electromechanically commutated excitation control means, instead of an electronic FOC means, with a set of sliding electrical contacts that synchronously activate phase coils in accordance with rotor speed and position.

In stark contrast, only the fully electromagnetic (e.g., no RE-PMs), symmetric circuit and control topology of the patented SYNCHRO-SYM has the simpler optimal electromagnetic symmetry of three essential components: 1) an “active rotor” comprising another directly excited multiphase winding set, which concurrently contributes an additional increment of torque and working power to the electromechanical energy conversion process along with the active stator while consuming its half of the electric motor loss, cost, and size, 2) the universally essential “active stator” for primary torque and working-power production, and 3) the integrally enabling brushless real-time emulation controller (BRTEC) for optimum, contiguously stable, constant-torque control from sub-synchronous to super-synchronous speeds (i.e., twice the MLS), including at or about zero and synchronous speeds, which in accordance with nearly a century of classic electric motor and generator study, research, and publication, calculates to twice the constant-torque speed range or twice the continuous power rating for half the cost, half the loss, and half the size per unit of continuous power rating of any asymmetric EMS with similar design parameters and packaging (less RE-PMs). Also, in accordance with the conservation of energy physics of a dual ported transformer topology, rotor and stator torque magneto-motive-force (MMF) on each side of the air-gap with associated inductance and core saturation potential are conveniently neutralized and as a result, only SYNCHRO-SYM provides at least octuple the peak torque and virtually zero torque MMF inductive reactance of any other EMS, regardless of the torque current magnitude, which is absolutely essential for practical direct-drive (i.e., gearless) electric propulsion, full electromagnetic & regenerative braking, and rapid torque vectoring response.

Note: The classic foundational study for any EMS operation, performance, and packaging technique begins with the symmetric circuit and control technology of an active rotor but only while hypothesizing the integral BRTEC for enabling contiguous stability at any speed.  The classic study becomes the follow-on study for any other EMS by deoptimizing the electromagnetic symmetry with the unbalanced asymmetry of a passive rotor.  Without ever realizing the enabling invention of a practical BRTEC and with the timely invention of high energy product RE-PMs (circa 1980) for the practical replacement of DC field windings and associated sliprings, a viable symmetric EMS was virtually forgotten (until the invention of SYNCHRO-SYM with a practical BRTEC).

Note: SYNCHRO-SYM technology can already bring today’s direct current superconductor EMS closer to practical reality but when alternating current superconductors become practical, the fully-electromagnetic (no RE-PMs) SYNCHRO-SYM will be the unbeatable EMS of choice.

Note: Today’s routine practice of basically integrating standardized, off-the-shelf asymmetric EMS components with performance distinction by a customized selection of available packaging techniques has obscured the need for applying theoretical EMS understanding while encouraging the anti-innovation attitude of “everything that can be invented has been invented.”  As a result, so-called EMS innovation is simply pumping $M into trying to reinvent legacy EMS technology, such reducing (or eliminating) RE-PMs from today’s best performing asymmetric EMS to mitigate the harmful human rights, geopolitical, and environmental consequences by a global adversary’s monopoly on the RE-PM supply chain.  In contrast, SYNCHRO-SYM research and development was uniquely inspired by a keen theoretical EMS understanding of the symmetric EMS circuit and control architecture, which physics verified to provide 2-8x the RE-PM asymmetric EMS performance with similar design and packaging.

In contrast to asymmetric EMS manufacturers with performance/price distinction by creative packaging and marketing, only BEM  has three additional, sought-after market advantages: 1) the patented active rotor SYNCHRO-SYM reaches the theoretical limit in EMS performance/price with a physics verified 2-8x performance/price of any other, 2) the patented active rotor SYNCHRO-SYM is truly a market sleeper with simple validation and market introduction by fabrication with commonly applied, straight-forward-ready EMS packaging techniques (less RE-PMs), and 3) the patented MOTORPRINTER provides cost-competitive manufacture of SYNCHRO-SYM by the only the compactly self-contained, remotely monitored and controlled, production scalable, just-in-time 3D Printer of electric motors instead of today’s offshoring nepotism for exploiting low cost labor.

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