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Protean Electric is a technology company that has developed an in-wheel, electric-drive system for hybrid, plug-in hybrid, and battery electric light-duty vehicles. Their technology creates a permanent magnet e-machine with relatively high torque and power density with the power electronics and controls packaged within the motor itself. Their in-wheel motor product is intended to be produced in low volume by Protean Electric and licensed in high volume to global automotive and Tier 1 automotive supply companies. Protean Electric is a privately held company with approximately 65 employees. Protean Electric has operations in the United States, United Kingdom, Shanghai China and Hong Kong. ==Technology== Protean Electric's in-wheel motor is intended to save space on board the vehicle by allowing the drive system to be mounted behind a conventional road wheel and apply torque directly to the wheel and tire. Each of Protean's in-wheel motors can deliver 75 kW (100 hp) and 1000 Nm (735 lb-ft) and weigh 34 kg (75 lbs.). They are sized to fit within the space of a conventional 18-inch or larger road wheel.〔“In-wheel motors could reshape cars” by Automotive News http://reviews.cnet.com/8301-13746_7-20104650-48/in-wheel-motors-could-reshape-cars/〕 The electric motors are designed for use in both front and rear-wheel drive vehicle applications and can be adapted to existing internal combustion engine powered cars and trucks to turn them into hybrids.〔HybridCars.com "Brabus Hybrid with Protean Motors Makes US Debut" http://www.hybridcars.com/news/brabus-hybrid-protean-electric-motors-makes-us-debut-45104.html〕 Since Protean Electric’s motors fit behind the wheels of a vehicle, they can be used as part of a drive system that does not require a gearbox, differential, or drive shafts. This creates an energy-efficient drivetrain that potentially saves cost, reduces weight and frees up space on board the vehicle that was previously dedicated to drivetrain components. According to Protean Electric, its in-wheel motors can increase fuel economy by over 30 percent depending on the battery size and driving cycle in a hybrid or plug-in hybrid vehicle. It is also capable of enabling torque vectoring by applying individual torque at optimal levels to each wheel to improve vehicle safety and handling. Protean has been awarded over 45 patents for its technology and design, and more than 100 additional patent applications have been filed and are pending internationally and with specific countries in North America, Europe and Asia. In-wheel motors offer the benefits of drastically improved vehicle packaging, simplified two-wheel or all-wheel-drive layouts, the option of through-the-road hybridization, more efficient regenerative braking, and the most direct wheel control possible. The downside is added unsprung weight which can impact handling performance.〔"Protean and Brabus Partner for Hybrid Mercedes with In-Wheel Motors" by Popular Mechanics http://www.popularmechanics.com/cars/news/auto-blog/Protean-Hybrid-Mercedes-Concept-8385092〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Protean Electric」の詳細全文を読む スポンサード リンク
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