A control device for step motor, through low cost configuration can make the electric testing for the load of step motor and prevent braking step effectively.

一种步进电机控制装置，通过廉价配置可以电检测步进电机负载并有效防止失步。

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Several companies have already started field-testing battery-electric passenger cars and light trucks for use in their fleets.

MSN: Fleets likely to drive early demand for electric cars

The Wave Hub, an electric "socket" for testing wave energy machines off the north Cornwall coast, has been unused since it was installed on the seabed in 2010, but managers say the first device is expected to be connected this year.

BBC: Scottish and English marine energy parks join forces

While GM gave up on the car, AeroVironment kept up its electric vehicle research and development and has been offering EV charging and testing equipment and services to automakers as well as selling a line of chargers for heavy-duty electric forklifts.

FORBES: AeroVironment Will Build A Filling Station In Your Garage