Gear adaptive variator may be the toothed tranny with the variable transfer ratio which is certainly adapting to the adjustable loading. Unsuccessful efforts of creation of a equipment variator had been undertaken repeatedly. The primary problem is-maintenance of continuous engagement of cogwheels of a variator. The decision of this problem could be based on usage of a kinematic chain with two examples of freedom. Earlier it was proved that kinematic chain with closed contour possesses the effect of power adaptation. The gear variator can be carried out in the type of the closed differential system. The external variable technical loading adjustments the transfer ratio itself with no control system. The apparatus 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 gear variator is based on discovery «Impact of power adaptation in mechanics» which is published in leading editions of world press. In the paper the bases of the idea of a gear adaptive variator are presented.
There are different types of DC drive setups with the designation dependant on the source of their DC current. This is often the case in emergency backup systems. For example, power plant life have a financial institution of batteries supplying DC current to emergency essential oil pumps that supply oil to the bearings of a turbine during a crisis shutdown. A second way to obtain DC current could possibly be from a (Motor-Generator) MG set. In this instance, the engine drives a DC generator that generates the DC current. These initial two types of drives offer pure DC current, for that reason they do not generate any significant electrically induced signals when it comes to vibration. The last type of DC drive, and the one that will be talked about in this paper, uses silicon managed rectifiers (SCRs) to rectify AC current into DC Current. These drives produce a DC transmission with AC pulses that match the firing of the SCRs. These pulses or lack thereof in the case of failed SCRs and or gating complications produce vibration signals that can be analyzed 
to look for the way to obtain the defect. Improper tuning of variable speed drives can also generate vibration problems.
Rectification: The first concept that should be understood when it comes to DC drives is definitely rectification. Rectification is the process of transforming AC current into DC current. Variator Gearbox Pictured below is definitely a half wave rectifier and the resulting result. Only the positive area of the current Al passes through the rectifier.