MEIDENSHA CORPORATION

Methods and circuits for controlling the power electronic converters (inverters, bridges) that supply current and voltage to electric motors, including switching strategies, voltage command generation, and multi-phase configurations.

Development of novel motor architectures beyond traditional radial flux designs, including linear, axial, or multi-armature configurations, often to optimize for specific performance characteristics like torque density or form factor.

Methods and components for optimizing the performance, efficiency, and control of electric motors, inverters, and power converters within electric vehicle and hybrid vehicle drivetrains.

Focuses on novel circuit configurations for DC-DC, DC-AC, or AC-DC conversion, often involving resonant operation, multi-level structures, or switched capacitors to improve efficiency, power density, or voltage conversion ratios.

Manufacturing processes and techniques for producing stator cores, windings, and coils, including lamination, impregnation, hairpin winding, and segment coil bending, to improve motor efficiency, power density, or reliability.

Techniques and circuits designed to regulate output, manage input variations, mitigate resonance, or ensure stable operation of power converters under diverse load and source conditions. This includes adaptive, predictive, or fault-tolerant control schemes.

Membrane and depth filtration for industrial separation, gas purification, and bioprocess clarification including cross-flow, dead-end, tangential flow filtration, and oil/water separation.

Techniques and devices for generating, shaping, focusing, and deflecting electron or ion beams, often involving multi-pole lenses, deflectors, and aberration correction for applications like microscopy or processing.

Devices and methodologies for precisely measuring rotational force (torque) or linear pulling force (tension) within mechanical systems, frequently incorporating compensation for environmental variables like temperature.

Devices and systems designed to protect electrical circuits from overcurrents, short circuits, and other faults, often involving rapid response, high voltage/current handling, and sophisticated interruption mechanisms.

Methods and structures employed within switches and circuit breakers to safely and efficiently quench electrical arcs generated during contact separation, preventing damage and ensuring reliable interruption.

Systems and methods for delivering radio frequency (RF) power to plasma processing chambers, including impedance matching, pulse shaping, and feedback control for stable and efficient plasma generation.

Sophisticated software or hardware-implemented control strategies that optimize motor performance, such as precise speed/torque regulation, vibration reduction, or efficiency, often using model-based, predictive, or adaptive techniques.

Describes capacitors designed with actively variable capacitance, often employing phase-change materials or mechanical actuation, for use in radio frequency (RF) components, reconfigurable intelligent surfaces, and other tunable electronic systems.

Focuses on the physical design, materials, and methods for packaging capacitors and integrating them onto circuit boards, including external electrode structures, conductive adhesives, and mounting techniques to ensure reliable electrical and mechanical connections.

Integration of electric motors into larger systems (e.g., vehicles, power tools) and safety features for high-voltage components, including control interfaces, mechanical integration, and environmental protection (e.g., waterproofing).

Addresses the design and arrangement of electric motors, transmissions, and associated power electronics (like inverters) to form integrated drive units for hybrid or electric vehicles, including specific components like busbars and electric brakes.

Membrane-based separation for water purification, contaminant removal, desalination, and wastewater treatment, including reverse osmosis, ultrafiltration, and forward osmosis modules.

Techniques for determining the rotor position, speed, or other operational parameters of an electric motor without dedicated physical sensors, often relying on back-EMF, current, or voltage measurements.

Engineering solutions for X-ray tube components, including integrated cooling systems (e.g., oil circulation) and control mechanisms for tube voltage and current to ensure stable and safe operation.

Techniques and apparatus for achieving and maintaining vacuum conditions within charged particle and plasma processing chambers, including pump control, vacuum degree monitoring, and chamber sealing.

Methods and systems for identifying anomalies, failures, or impending issues within electric motors or their associated drive and power management circuits, often by monitoring electrical or operational parameters.

Design and control of plasma processing chambers, including heating, gas delivery, electrode configurations, and magnetic field control for uniform and efficient material processing in semiconductor manufacturing.

Utilizing sound and vibration analysis to detect malfunctions, assess balance, or monitor the operational health of machinery and structures. This often involves sensors, signal processing, and pattern recognition.

Explores the composition and integration of solid or gel-based electrolyte materials within various capacitor types, such as solid electrolytic capacitors and supercapacitors, to enhance performance, stability, and safety.

Technologies and systems for removing unwanted components or separating desired gases from a mixed gas stream, including adsorption, absorption, and membrane-based methods.

Methods and materials used to construct robust and protective enclosures for electronic devices, focusing on structural integrity, impact resistance, thermal dissipation, and specialized material properties for enhanced durability.

Methods and structures for integrating and enclosing electronic components into compact, multi-functional modules, often involving embedded components, multi-layer substrates, and electromagnetic shielding for performance and miniaturization.

Design and assembly of power conversion, distribution, and protection modules, focusing on compact form factors, efficient electrical connections, and robust protective measures for electronic systems, often in high-power applications.

Mechanical, electromagnetic, or hydraulic systems used to physically operate the contacts of a switch or circuit breaker, focusing on the linkages, motors, coils, or fluid dynamics involved.

Focuses on the internal and external structural elements, material compositions (e.g., ceramic dielectrics, electrode metals), and manufacturing techniques used to create multilayer ceramic capacitors (MLCCs), including aspects like mechanical robustness and internal circuitry.

Systems that employ imaging and image processing to automatically detect defects, verify states, or ensure quality control in manufactured goods, printed materials, or industrial processes.