A micro detecting device includes a controller and a mobile device. The controller has a first wireless communication module. The mobile vehicle includes a vehicle body; a processor, accommodated in the vehicle body; a second wireless communication module, accommodated in the vehicle body and electrically connected to the processor; a power actuator, disposed on the vehicle body and electrically connected to the processor for driving the vehicle body; a recording unit, disposed on the vehicle body and electrically connected to the processor and the second wireless communication module, and the recording unit is configured to generate a recorded signal; and a fluid detecting unit, disposed on the vehicle body and electrically connected to the processor and the second wireless communication module, and the fluid detecting unit is configured to generate a detection signal.

The magnet material is represented by a composition formula 1: (R.sub.1-xY.sub.x).sub.aM.sub.bA.sub.c, where R is at least one element selected from the group consisting of rare-earth elements, M is at least one element selected from the group consisting of Fe and Co, A is at least one element selected from the group consisting of N, C, B, H and P, x is a number satisfying 0.01x0.8, a is a number satisfying 4a20 atomic %, b is a number satisfying b=100ac atomic %, and c is a number satisfying 0c18 atomic %), and includes a main phase having a Th.sub.2Ni.sub.17 crystal structure. A concentration of the element M in the main phase is 89.6 atomic % or more.

A charging system charges, through an external charger, a first voltage source and a second voltage source that supply electric power to a rotating electric machine that includes coils of phases. A first inverter is connected to respective first ends of the coils and the first voltage source. A second inverter is connected to respective second ends of the coils and the second voltage source. A first switch is provided on a first power supply line that connects a high potential side of the first voltage source and a first external connection terminal that is connected to a high potential side of the external charger. A second switch is provided on a second power supply line that connects a low potential side of the second voltage source and a second external connection terminal that is connected to a low potential side of the external charger.

An electric wheelchair control system is adapted to control a wheelchair and comprises a sensing assembly, an inertial sensor, a controller, a motor driver, and a three-phase AC motor. The sensing assembly is configured to detect an external force applied to the wheelchair and generate a first sensed signal based thereon. The inertial sensor is configured to detect an inclination of the wheelchair and generate a second sensed signal based thereon. The controller selectively outputs a PWM braking signal to the motor driver according to the first sensed signal and the second sensed signal, and the PWM braking signal includes an upper arm braking signal and a lower arm braking signal, wherein the upper arm braking signal and the lower arm braking signal have the same duty cycle and when the upper arm braking signal is at a high level, the lower arm braking signal is at a low level.

A motor-generator system for hybrid electric internal combustion engine applications includes a selectively-engageable motor-generator located co-axially with a front end of the engine crankshaft. The motor-generator system includes at least a first rotor rotationally coupled with the crankshaft and an axially-displaceable stator which is held against rotation relative to the engine. Preferably, a motor-generator controller controls an actuator to axially displace the stator between engaged and disengages states. When in the engaged state, the stator electromagnetically interacts with the rotor to generate electric energy from crankshaft-supplied torque or to produce torque to deliver to the crankshaft and/or an engine accessory drive. The motor-generator system may have multiple axially-displaceable stators and rotors to increase the output of the motor-generator system.

An electric machine rotor including a first stamped rotor lamination and a first stamped sheet of a material different than the first stamped rotor lamination is provided. The first stamped rotor lamination may define a pair of magnet pockets. The first stamped sheet may be coplanar with and scarf jointed to the first stamped rotor lamination to define a center bridge between the magnet pockets that has a magnetic permeability less than, and a mechanical strength greater than, the first stamped rotor lamination. The rotor may further include a second stamped sheet of a material different than the first stamped rotor lamination coplanar with and scarf jointed to the first stamped rotor lamination to define a top bridge adjacent to one of the magnet pockets at a perimeter of the rotor that has a magnetic permeability less than, and a mechanical strength greater than, the first stamped rotor lamination.

Methods and systems for activating electric vehicles are provided. One method includes, in response to a first command to activate the vehicle, transitioning the vehicle from an inactive state to a wake state where a controller of the vehicle is activated and the vehicle is prevented from being propelled by an electric motor of the vehicle. The method also includes, in response to receiving a second command to activate the vehicle after receiving the first command, transitioning the vehicle from the wake state to a ready state where the vehicle is permitted to be propelled by the electric motor.

An magnetic material is a magnetic material expressed by a composition formula: (R.sub.1-xY.sub.x).sub.aM.sub.bT.sub.cA.sub.d, which includes a main phase consisting of a ThMn.sub.12 type crystal phase. 30 atomic percent or more of the element M in the composition formula is Fe.

A drive system for a rail vehicle includes a plurality of drive motors. The drive motors include at least one permanent magnet motor and at least one asynchronous motor and/or at least one reluctance motor. A rail vehicle having wheelsets, each of which includes two oppositely disposed wheels and which are driven at least partially by the drive system, is also provided.

Methods and systems for activating electric vehicles are provided. One method includes, in response to a first command to activate the vehicle, transitioning the vehicle from an inactive state to a wake state where a controller of the vehicle is activated and the vehicle is prevented from being propelled by an electric motor of the vehicle. The method also includes, in response to receiving a second command to activate the vehicle after receiving the first command, transitioning the vehicle from the wake state to a ready state where the vehicle is permitted to be propelled by the electric motor.