Simplifying BLDC commutation and feedback system Design How-To 3/31/2009 Post a comment In a Brushless DC (BLDC) motor system, an electronic mechanism
is required to commutate the system. Unlike a Brush DC motor system,
the permanent magnet is located at the Rotor and the windings are
located at the Stator. As a result of this setup arrangement, the
windings are required to energize in sequence, to enable smooth
commutation. For the electronic system to determine which windings to
energize, Hall sensor feedback is used to get the current location of
the windings with respect to the
Mobile operators seal, extend network sharing deals News & Analysis 3/23/2009 Post a comment In a wide-ranging cost cutting deal that will have major implications for their equipment suppliers, and further down the chain for many component suppliers, Vodafone and Telefonica have confirmed they will pool their mobile networks in the U.K and said that the deal covers several other European countries.
Making Automotive DC-motor driving simple and safe Design How-To 3/5/2009 Post a comment An increasing number of high-power DC motors are used in many automotive applications. Being smaller and lighter than previous versions, they have to draw higher currents in order to offer a suitable torque. The article describes a highly integrated MOSFET H-bridge for this purpose.
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.