Real Innovation for Our Clean, Efficient, and Sustainable Energy Future!
Powering Our World with Less Energy, Smaller Carbon Footprint, Plug & Play Solution, and Modularity!
BEST ELECTRIC MACHINE → BOTTOM LINE UP FRONT
Best Electric Machine (BEM) is a U.S.-based electric motor-generator system (EMS) manufacturer commercializing SYNCHRO-SYM™, a practical symmetric, active-rotor EMS architecture that eliminates reliance on rare-earth permanent magnets (RE-PM)—and their associated geopolitical and supply-chain risks—while significantly improving performance.
BEM supports any production volume or custom design requirement through MOTORPRINTER™, a practical BEM-CAD™–programmable, additive-manufacturing platform capable of securely fabricating high-performance axial-flux electric machines using advanced core materials, without conventional retooling overhead or material waste. Production scales modularly through replication of the compact, portable MOTORPRINTER™ manufacturing platform.
Together, SYNCHRO-SYM™ and MOTORPRINTER™ establish a sovereign electric machine manufacturing capability in support of national infrastructure and supply chain resilience.
SYNCHRO-SYM™ is not a new theoretical construct, but the practical realization of symmetric, active-rotor electric motor-generator system architecture made possible by modern advances in commercially practical power electronics, digital control bandwidth, integrated system design, and advanced manufacturing capabilities. It provides a magnet-free, drop-in replacement for today’s variable-speed, asymmetric, passive-rotor electric motor-generator systems, including induction, reluctance, field-wound, and rare-earth permanent-magnet architectures—delivering:
2× to 8× improvement in nominal performance per dollar
Increased electromagnetic efficiency
Reduced conductor and core material per kilowatt
Greater than 8× peak torque capability, enabling practical next-generation electric vehicles (EV) electromagnetic gearing and high-capacity, regenerative brake-by-wire.
SYNCHRO-SYMTM is technically proven and ready for immediate commercialization with rapid, reprogrammable, stateside additive manufacturing, a truly software-defined EMS targeted for 2026.
SYNCHRO-SYM uses a truly unique active-rotor electric-machine architecture that adds working power within the same design specification and package footprint—effectively doubling whatever performance competing motor systems may claim under the same constraints, placing SYNCHRO-SYM in a class of its own—by physics, not hype.
Even today’s most advanced EV motors—including high-performance axial-flux designs such as those developed by YASA Limited and adopted by Mercedes-Benz—remain optimized passive-rotor machines operating near the classical limits of that architecture and packaging. SYNCHRO-SYM upgrades these machines to an active-rotor architecture that delivers additional power within the same package.
BEM provides not only a uniquely superior electric-machine architecture, but also a uniquely superior low overhead, low waste, portable, secure, reprogrammable, additive manufacturing method that enables axial-flux electric machines—including SYNCHRO-SYM—enabling high-performance amorphous layered magnetic materials and enhanced thermal-management capability.
Rare-earth permanent-magnet (RE-PM) electric-machine systems represent today’s highest-performing conventional technology, achieving widespread market adoption. However, their dependence on highly concentrated rare-earth supply chains introduces significant material-resilience and geopolitical risks. As supply-chain security remains uncertain, some manufacturers are pursuing rare-earth-free electric-machine systems that reduce these risks, typically accepting lower performance as the tradeoff.
SYNCHRO-SYM™ uniquely provides a permanent-magnet-free alternative that improves performance, enabling supply-chain resilience without sacrificing system capability and thereby strengthening national security.
“SYNCHRO-SYM does not out-market competitors — It out-measures them.”
Fundamentally arising from the inherent circuit and control asymmetry of an active stator with an independently excited multiphase winding set (active winding set) paired with a passive rotor using permanent magnets (PM), reluctance saliencies, DC field windings, or slip-induction windings, and governed by offline compensatory derivatives of field-oriented control (FOC) or direct-torque control (DTC), the asymmetric electric-machine system (A-EMS) architecture in use today is intrinsically constrained in scalability, power density, and core utilization, and remains dependent on fixed-tooling manufacturing that requires die retooling and lamination re-inventory for changes in power rating or production volume.
Free from today’s EMS constraints, SYNCHRO-SYM™ scales across EV, wind, aerospace, and commercial applications by providing the classic “symmetric” electric motor-generator system (S-EMS):
Active Stator + Active Rotor Symmetry — both halves independently deliver working power to the electromechanical conversion, performance-to-price grounded in physics—not marketing spin.
Brushless Real Time Emulation Control (BRTEC™) — compact solid-state, quantum level stabilization with a brushless, symmetrically bidirectional, inherent soft switching, pure sinusoidal, direct AC-to-AC power conversion method at half the current rating; no bulky, costly DC link stage — inherently providing full rotor and stator metrics for superior reliance and automatic sensor-less optimization. Highly adaptable, BRTEC conveniently enables an ultra-high-performance, symmetrically bi-directional, multiphase, isolated EV micro-distribution bus and battery recharger.
Integrally unified electric motor-generator and control technology — not the mated, disparate circuit and control technologies of today’s A-EMS, evolving from different disciplines — compact solid-state BRTEC fits within the axial-flux annulus for another level of integration and power density.
Just-In-Time Additive Manufacturing — enables rapid, low waste, scalable, secure, and reprogrammable production with MOTORPRINTER™, an electric motor 3D Printer Method, and BEM-CAD™, the only EMS CAD with SYNCHRO-SYM extension and cross-analysis.
Future-Ready Architecture — most compatible symmetric circuit and control technology for retrofitting the next-generation EMS, including the superconductor EMS.
Expert-Driven Culture — engineering excellence, customer focus, and principled innovation.
SYNCHRO‑SYM™ EMS —The Ultimate EMS
Every SYNCHRO‑SYM™ purchase is more than an EMS purchase—it’s an investment in “Real Innovation for Our Clean, Efficient, and Sustainable Energy Future.”
Every EMS product purchase today—especially the constant wave of so-called advanced high-performance EMS designs—ultimately delivers another “same-old” asymmetric, passive-rotor EMS constrained by the classical limits of that architecture and packaging but claiming performance-to-price advantage through marketing hype and flashy visuals that merely insinuate a technology breakthrough.
The EMS of today relies on the same non-optimal asymmetric electric motor-generator system circuit and control architecture (A-EMS)—an “active-stator” with an independently-excited multiphase winding set (active winding set) that solely delivers the working power to the electromechanical power conversion process, paired with a “passive-rotor” using RE-PMs, slip-induction windings, field windings, or reluctance saliencies that cannot deliver working power but consumes the other half of motor size, loss, and cost in cascade with the active stator, and glued together by a disparate, estimation-dependent, high harmonic content, compensatory field-oriented control (FOC) derivative, enable by prevailing electronic technologies—performance-to-price distinction relies on unfairly exploiting the design specification or re-engineering the empirical selection of legacy packaging techniques without allowing the same opportunity to contestants—physics dictates similar nominal performance-to-price results if packaging and design specifications are equally applied.
The EMS of today is built from essential but separately distinct components—electric motor, electronic controller, and if needed, high maintenance and lossy gearbox—all from different technical disciplines without shared understanding—often from different manufacturing sources with so-called “integration” amounting to little more than adjacent placement. Depending on which component is referenced, the compounded losses, costs, and size of these essential components are often overlooked in the real-world “system of systems” performance—leaving EMS customers misled and frustrated. Note: The gearbox reduces the amount of costly rare-earth permanent magnets (RE-PM) by enabling a smaller, higher speed motor to achieve reasonable application torque.
A Best Electric Machine (BEM) SYNCHRO‑SYM™ product purchase—provides the fundamental symmetric, active rotor circuit and control architecture and foundational study for all—delivering superior performance-to-price advantage over all other asymmetric, passive-rotor architectures by applying real innovation grounded in the principles of physics instead of marketing spin.
Our patented SYNCHRO-SYM™ establishes the commercially realizable form of the optimal symmetric electric motor-generator system circuit and control architecture (S-EMS): a brushless, dual-active power-conversion system in which both stator and rotor actively participate in electromechanical energy conversion. This architecture is enabled exclusively through our patented, integrally unified, solid-state, brushless, sensorless, pure-sinusoidal Real-Time Emulation Control (BRTEC), made practical by the performance advancements of modern power electronics and computational control. When evaluated at equivalent voltage, frequency, torque, and packaging constraints, electromagnetic symmetry yields approximately 2× nominal performance-to-price and up to 8× peak torque capability relative to contemporary passive-rotor asymmetric systems (A-EMS).
Our patented SYNCHRO‑SYM is an integrally unified circuit and control system—never sold separately—always factoring the added losses, costs, and size of every system part for real world performance, including BRTEC.
Our patented Brushless Real Time Emulation Control (BRTEC™)—compact solid-state, quantum level stabilization with inherent symmetrically soft switch, pure sinusoidal, direct AC-to-AC power conversion at half the current rating; no bulky, costly DC link stage—inherently providing full rotor and stator metrics in real-time for superior operation and integrally unified into the frame for another level of EMS power-density. Highly adaptable, BRTEC conveniently enables an ultra-high-performance, symmetrically bi-directional, multiphase, isolated electric vehicle (EV) micro-distribution bus and battery recharger—doubling the performance-to-price advantage of WBG semiconductors.
A BEM SYNCHRO‑SYM™ product purchase—provides the only commercially practical symmetric, active rotor electric motor-generator system architecture (S-EMS) product for a truly new era in low-carbon footprint electrification.
As the foundational theoretical framework for electric machine systems, the S-EMS architecture is not new; rather, it fundamentally defines the governing electromagnetic relationships, circuit and control structures, packaging constraints, and thermal limits of the electromechanical energy-conversion process. Asymmetric electric machine systems can be understood as practical, de-optimized derivatives of this symmetric framework, in which actively controlled rotor excitation symmetry is replaced by passive-rotor asymmetry enabled by less stringent field-oriented estimation and control—methods consistent with the electronic control capabilities available during their commercial development. Accordingly, over a half-century of classical laboratory research already validated 2× to 8× performance-to-price and torque of the original A-EMS package retrofitted with the S-EMS circuit and control technology (e.g., active rotor + BRTEC)—reducing losses, constraining core saturation, eliminating the need for rare-earth magnets, slashing strategic materials, such as copper or aluminum, per kW, and realistically enabling maintenance-free, tunable, gearless electromagnetic transmission & electromagnetic braking.
Note: Never realizing the practical BRTEC invention (until SYNCHRO‑SYM™) to brushlessly propagate speed-synchronized multiphase power to the rotor—constrained by the limitations of prevailing control technologies—the higher performing S-EMS was sidelined by the timely invention of the high-energy product RE-PM (circa 1980) for a practical RE-PM A-EMS with unforeseen environmental, unsustainable, and geopolitical consequences of its widespread adoption. Despite SYNCHRO-SYM™ already demonstrating a practical S-EMS, the industry remains blind to its existence, because SYNCHRO-SYM™ is repeatedly mistaken for familiar A-EMS variants with legacy packaging techniques and geometries: wound-rotor doubly-fed “induction” machines with passive multiphase rotor windings, brushless doubly-fed designs with unlike pole-pairs, or so-called ‘symmetric’ A-EMS (e.g., DeepDrive) that rely on nothing more than legacy, geometric dual-rotor or dual-stator symmetry with the expanded package size, loss, and cost of two highly integrated motors.
SYNCHRO‑SYM is a drop-in replacement to today’s A-EMS—including any in-wheel EMS—but uniquely with more power, more torque, more efficiency, and no rare-earth permanent magnets.
SYNCHRO-SYM™ conforms to the evolving EV and aerospace packaging frameworks developed for today’s A-EMS—frameworks that have largely defined the performance ceiling of A-EMS architectures—eliminating mechanical re-engineering while delivering a step change in performance through its active-rotor symmetric electromagnetic architecture.
SYNCHRO‑SYM is a no-brainer upgrade to today’s advanced, externally excited field-wound synchronous A-EMS—providing the same RE-PM-free benefits but with far superior performance.
SYNCHRO-SYM provides superior performance in rare-earth-free, low-speed, high-power direct-drive applications—operating regimes historically constrained to rare-earth permanent-magnet machines due to the torque-density, efficiency, and core saturation limitations of conventional passive-rotor alternatives.
SYNCHRO‑SYM is the realistic software-defined EMS, as only possible with the symmetry of an integral active rotor electric motor-generator circuit and integrally-unified control technology—the so-called software-defined EMS of others is built with the deoptimized asymmetry of separate, adjacently mounted, passive rotor circuit and externally mounted control components.
SYNCHRO‑SYM will be the future’s EMS of choice—even enabling the practical reality of superconductor packaging techniques that establish air-gap flux density beyond the supporting limits of core material.
“While all others continue the hard work of optimizing legacy EMS packaging geometry using century old asymmetric circuit and control technology with a passive rotor of slip-induction, rare-earth permanent magnets, reluctance saliencies, or DC field windings,” said Frederick W. Klatt, CTO of BEM, “Only BEM did the hard work of researching, developing, engineering, and manufacturing the optimum symmetric circuit and control technology with an active rotor, called SYNCHRO-SYMTM, that uses the same optimized A-EMS package geometry yet doubles the nominal power rating and halves the cost and loss per kW with both rotor and stator working together.”
A BEM SYNCHRO-SYM product purchase—provides quick, secure inhouse, additive manufacturing by our patented MOTORPRINTER™ 3D Printing method, called MOTORPRINTER™—reprogrammed by BEM’s computer aided design tool (BEM-CAD)—all other EMS manufacturing relies on the same-old subtractive manufacturing methods, perhaps supplemented with automation.
MOTORPRINTER enables just-in-time customization – Allows rapid, just-in-time adaptation to specific customer needs.
MOTORPRINTER enables proprietary SYNCHRO-SYM™ direct cooling with unmatched thermal management for superior performance.
MOTORPRINTER enables system advantages – Delivers higher reliability, significantly lower cost, greater power density, and higher specific power compared to conventional methods.
MOTORPRINTER enables advanced materials integration – Enables practical use of exotic, high-performance core materials for high and low frequency machines, such as thin amorphous or nano-crystalline ribbon, previously impractical in motor manufacturing, while eliminating the price premium typically associated with complex axial-flux electromechanical structures.
MOTORPRINTER enables rapid deployment and distributed domestic production scaling through modular replication of its compact, process-ready, containerized, automated additive-manufacturing platform.
A BEM SYNCHRO-SYM product purchase—means working with our lean, expert-driven team culture that prioritizes customer satisfaction, engineering excellence and genuine innovation—uniquely delivering a truly groundbreaking S-EMS solution. Unlike today’s A-EMS product purchase that prioritizes flashy branding and marketing spin but delivers the same-old A-EMS solution as new and innovated.
Only BEM established a higher-purpose commercialization framework to bring the next-generation brushless axial-flux SYNCHRO-SYM™ to market—targeting the $100B EV propulsion market—correctly including the complete EMS system cost, not just the motor-generator. BEM also plans to expand into the $200B industrial EMS market.
SYNCHRO‑SYM™ represents one of the single biggest opportunities to accelerate our clean, efficient, and sustainable energy future—Both the battery and the EMS account for 30–40% of the EV’s total cost-of-goods with an equally significant impact on performance, price, and sustainability. With 85% of EVs still relying on rare-earth permanent magnets (RE-PMs) EMS, switching to SYNCHRO-SYM™ delivers a step-change-improvement in efficiency, power density, and cost.
SYNCHRO‑SYM™ offers significantly higher-performance and an ethically sound alternative to the RE-PM-based A-EMS—anecdotally regarded by practitioners as the best EMS but unethically monopolized by geopolitical adversaries causing alarming environmental, labor, supply chain, and geopolitical risks. By eliminating the RE-PM array from the EMS with a better performing solution, SYNCHRO‑SYM™ redirects a majority of these scarce materials to other strategic applications and mitigates the sustainability of global mineable reserves.
SYNCHRO‑SYM™ delivers the industry’s lowest-carbon-footprint EMS—uniting magnet-free SYNCHRO-SYM™’s unmatched efficiency, power density, and lowest cost with MOTORPRINTER™’s additive manufacturing.
Every SYNCHRO‑SYM™ purchase is more than an EMS perchase—it’s an investment in “Real Innovation for Our Clean, Efficient, and Sustainable Energy Future.”
Transformed the foundational study and pinnacle of electric motor-generator technology into practical reality with invention, research, development, and radial-flux SYNCHRO‑SYM™ prototypes for S-EMS validation—the active-rotor S-EMS delivers 2× to 8× the performance-to-price and torque of any passive-rotor A-EMS package according to over a half-century of classical laboratory research.
Engineered a validated, scalable working design template for retrofitting the radial-flux product line of a major industrial motor division, ultimately leading to a $4M contract negotiation.
Speaking engagements and authored articles with NREL and IEEE—all providing peer-review validation.
Orchestrated empirical MOTORPRINTER validation studies with fiber laser and amorphous metal companies.
Patented a portfolio of technologies covering S-EMS architecture and 3D Printing—vetted, peer review validation.
Developed Axial-Flux SYNCHRO‑SYM™ CAD Tools (i.e., BEM-CAD™) for programmable MOTORPRINTER™ production of our next-generation axial-flux designs—quick, just-in-time manufacture of any customer power rating request.
Developed the modular BRTEC design architecture with compact solid-state Magnetic Sharing™, inherent soft switching, pure sinusoidal, and symmetrically bidirectional, direct AC-To-AC power conditioning with a scalable power module—no bulky and inefficient DC Link Stage with high harmonic content excitation—quick BRTEC retrofit to any customer power rating request.
Developed a convenient means to stack SYNCHRO-SYMs lengthwise for incremental increases in power rating, redundancy, and resiliency as is only possible with integrally self-contained SYNCHRO-SYMs.
Developed “How Do You Know SYNCHRO-SYM Outperforms the EMS of all others?“—a set of simple, physics-based rules for our customers to equitably compare our competitors’ EMS performance-to-price claims, cutting through the marketing spin—backed-up by BEM-CAD™.
Every SYNCHRO‑SYM™ purchase is more than an EMS purchase—it’s an investment in “Real Innovation for Our Clean, Efficient, and Sustainable Energy Future.”
Providing the only commercially practical EMS with the optimal electromagnetic symmetry of an active rotor replacing the passive rotor in the same A-EMS package footprint—contributing additional working power alongside the active stator—SYNCHRO-SYM™ eliminates reliance on exotic RE-PMs or costly Halbach magnet arrangements—delivering breakthrough performance at the world’s lowest cost per unit of power. Employing a time-proven axial-flux form factor, engineered using BEM-CAD and securely manufactured in-house with BEM’s rapid, low waste, just-in-time, reprogrammable MOTORPRINTER™ that likewise enables a high capacity thermal management system, SYNCHRO-SYM™ is now available for purchase with a transparent, well-defined price and delivery schedule—clearly distinguishing it from asymmetric EMS competitors that rely on creative marketing, offshore manufacturing, and opaque price-delivery negotiations.
For more demanding applications, BEM-CAD enables the custom design of the novel, brushless axial-flux SYNCHRO-SYM™ that achieves the world’s lowest cost per unit of power at the customer’s required performance point and minimum purchase volume. BEM-CAD likewise enables the superior low-speed, high-power SYNCHRO-SYM™ for RE-PM-free direct-drive systems, including wind-turbine applications.
BEM-CAD™ confirms our “novel” brushless 280 kW (continuous duty) or 560 kW (peak duty/gearless 2675Nm torque) @ 2000 RPM constant-torque-speed-range (CTSR) Axial-Flux SYNCHRO-SYM—speeds beyond CTSR enter the constant-power-speed-range (CPSR)—available for lowest-cost per unit of power while exceeding peak ratings under similar operating conditions, fully aligned with the criteria for equitable EMS cross-comparison. ** All specifications include the size, loss, and cost of the integral controller (i.e., BRTEC™) **
Operating Conditions: 400-800V
CTSR: 2000 RPM, peak speed is 6000 RPM
Dimension: Diameter: 300mm (11 in.) x Length: 95mm (3.7 in.) x Weight: 27Kg (59 lbs.) ** All specifications uniquely include the size, loss, and cost of BRTEC™ **
Note: Constant-torque speed range (CTSR) is the speed range where rated or burst torque can be applied. Operation above CTSR enters the constant-horsepower speed range (CPSR) where rated or burst torque must be linearly reduced with increasing speed to continue safe operation. The “motor CTSR” and torque determines the need for additional gearing to meet the load CTSR—let BEM design SYNCHRO-SYM to meet your load CTSR without a gearbox.
Note: “Maximum Speed” is often flaunted as a performance metric, but it is really just the upper mechanical limit before dynamic failure, offering little insight into usable performance.
Note: As the only unified, turnkey electric motor-generator circuit and control system, SYNCHRO-SYM’s controller and electric machine components cannot be sold separately—the loss, size, weight, and cost of our integral BRTEC controller are always included in SYNCHRO-SYM performance results.
Note: A meaningful comparison requires EMS contestants to be evaluated at the same CTSR, torque, voltage, and frequency. Only under these equal conditions do true comparisons emerge, such as the EMS peak power density, peak specific power, peak torque, system cost, and peak nominal efficiency at the same safe-operating burst duration (at least 10 seconds with rated active cooling, which is the real-world acceleration window).
Note: Upon customer request, BEM-CAD can redesign and reprogram MOTORPRINTER™ just-in-time to build a customer specified SYNCHRO-SYM™ with unmatched efficiency or power density.
For our customers with a tamer application, BEM-CAD designed our “novel” Brushless 140 kW (continuous duty) or 280 kW (peak duty/gearless 2675Nm torque) @ 1000 RPM CTSR Axial-Flux SYNCHRO-SYM, available for lowest-cost per unit of power:
Dimension: Diameter: 398mm (15.7in.) x Length: 78mm (3 in.) x Weight: 31Kg (69 lbs.)
For our customers with an even tamer application, BEM-CAD designed our “novel” Brushless 72 kW (continuous duty) or 144 kW (peak duty/gearless 2675Nm torque) @ 500 RPM CTSR Axial-Flux SYNCHRO-SYM, available with lowest-cost per unit of power:
Every SYNCHRO‑SYM™ purchase is more than an EMS purchase—it’s an investment in “Real Innovation for Our Clean, Efficient, and Sustainable Energy Future.”
We invite visionary customers and early supporters to help us bring this breakthrough technology to market. Whether through informed word-of-mouth among your trusted colleagues or through strategic partnerships, your advocacy can help us reach our goal of 2,000 units—the critical commercialization threshold for our axial-flux SYNCHRO-SYM early access program.
Better Than Alibaba’s Benchmark — At Scale
With our special introductory program—built around fulfilling individual or group orders totaling just 2,000 units—BEM will initiate U.S.-based production of the MOTORPRINTER-produced axial-flux SYNCHRO-SYM. Even in this launch phase, our 560KW/2000RPM SYNCHRO-SYM consistently outperforms and underprices the imported, peak duty 150kW RE-PM A-EMS from Alibaba—the standard for ultra-low cost—while eliminating rare-earth dependence, strengthening domestic manufacturing resilience, and advancing national clean energy and supply chain security goals.
Partner with BEM as a Test & Validation Lead
We’re actively seeking third-party and customer test partners for our axial-flux SYNCHRO-SYM. Be among the first to validate and demonstrate this next-generation electric propulsion system.
As of today, we offer 3 power-levels of axial-flux SYNCHRO-SYM, 560KW, 280KW, and 140KW, all with a gearless, direct-drive torque of more than 2675 Nm. Let us do your electric propulsion design & pricing, if you desire something different.
We’re always open to creative partnership ideas that accelerate our mission!
