Gear adaptive variator may be the toothed tranny with the variable transfer ratio which is certainly adapting to the variable loading. Unsuccessful efforts of creation of a equipment variator were undertaken repeatedly. The main problem is-maintenance of continuous engagement of cogwheels of a variator. Your choice of this problem can be based on usage of a kinematic chain with two examples of freedom. Earlier it was proved that kinematic chain with shut contour possesses the effect of power adaptation. The gear variator can be carried out in the kind of the closed differential system. The external variable technological loading changes the transfer ratio itself without any control system. The gear variator opens essentially new idea of creation of adaptive engineering for machines with variable technological level of resistance (for example, adaptive gearbox of car). The theory of a equipment variator is founded on discovery «Effect of power adaptation in mechanics» which is definitely released in leading editions of world press. In the paper the bases of the idea of a equipment adaptive variator are shown.
There are different types of DC drive setups with the 
designation dependant on the foundation of their DC current. This is the case in emergency back-up systems. For example, power vegetation have a bank of batteries that supply DC current to emergency oil pumps that supply essential oil to the bearings of a turbine during an emergency shutdown. A second source of DC current could possibly be from a (Motor-Generator) MG set. In this case, the engine drives a DC generator that generates the DC current. These 1st two types of drives provide pure DC current, consequently they do not generate any significant electrically induced signals when it comes to vibration. The last kind of DC drive, and the one that will be discussed in this paper, uses silicon managed rectifiers (SCRs) to rectify AC current into DC Current. These drives produce a DC signal with AC Variator Gearbox pulses that match the firing of the SCRs. These pulses or absence thereof in the case of failed SCRs and or gating problems produce vibration signals which can be analyzed to look for the source of the defect. Improper tuning of adjustable speed drives may also generate vibration problems.
Rectification: The first concept that should be understood when it comes to DC drives can be rectification. Rectification is the process of switching AC current into DC current. Pictured below can be a fifty percent wave rectifier and the resulting output. Only the positive portion of the current Al passes through the rectifier.