About two months ago, on January 28, DJI quietly released its upgraded propulsion systems, the 310 and 800. Both are standalone versions of the propulsion systems on DJI’s Phantom 2 and Inspire, respectively. While DJI has been a relatively dull to date, its new products seem to cater to real experts rather than its usual crowd of fanboys. The new ESCs and motors aren’t just quality products like TMotors, they’re stuffed with technology that previously been restricted to labs and research facilities. You can check out an in depth description (and another) by one of DJI’s engineers, Dr. Turbo. Here are some early pictures.
From what I can tell, some of DJI’s “improvements” are just marketing material, while some developments are significant steps forward in the high-end consumer grade market.
– Higher Slot Fill (more “full” motors) – DJI uses a single strand method which allows the greatest density of cabling, increasing torque and efficiency while decreasing weight. Read more about winding at Fly Electric. The new design also allows better heat dissipation.
– Improved fan system – supposedly 10-20% better cooling
– Programmable – ESCs can be set to custom parameters for each motor. Data port allows firmware updates.
– Closed Loop – ESCs monitor motor response to current and can prevent jumping, high frequency harmonics, and desyncing. Far improved CPU on the ESCs and new ESC design seems to increase weight, but that is the only notable drawback.
– 2 way Communication – real time updates on motor condition, preflight check / failsafe for damaged or disconnected motors. (Previously available on the non-DJI Px4 system)
– Anti Spark, Coax & LEDs – Power connection won’t spark when plugged in, preventing oxidation. Power wires are coaxial, decreasing noise. External LEDs plug into the ESCs and are selectable and can be set to a variety of colors
– Updated Design – the 13.5″ propellers were designed from the ground up, and are supposedly optimized for their application. DJI propellers have always been highly efficient and I’m sure this is no different.
– Material Engineering – DJI has a new mix of carbon which is sure to be the right blend of flexible and stiff. They’ve been designed to be low inertia to increase efficiency.
– Self Tightening – DJI’s updated its self tightening mechanism and has added locks to make sure the propellers stay in place.