Gear adaptive variator is the toothed tranny with the adjustable transfer ratio which is certainly adapting to the adjustable loading. Unsuccessful tries of creation of a equipment variator had been undertaken repeatedly. The main problem is-maintenance of continuous engagement of cogwheels of a variator. The decision of this problem could be based on utilization of a kinematic chain with two levels of freedom. Earlier it was proved that kinematic chain with shut contour possesses the result of drive adaptation. The apparatus variator can be performed in the type of the shut differential system. The external variable technical loading changes the transfer ratio itself without any Variator Gearbox control system. The gear variator opens essentially new idea of creation of adaptive engineering for devices with variable technological level of resistance (for instance, adaptive gearbox of car). The theory of a gear variator is based on discovery «Impact 
of push adaptation in mechanics» which is definitely released in leading editions of globe press. In the paper the bases of the theory of a gear adaptive variator are shown.
There are various kinds of DC drive setups with the designation depending upon the source of their DC current. This is the case in emergency back-up systems. For instance, power vegetation have a financial institution of batteries that supply DC current to emergency oil pumps that supply oil to the bearings of a turbine during a crisis shutdown. A second source of DC current could possibly be from a (Motor-Generator) MG established. In this instance, the electric motor drives a DC generator that generates the DC current. These initial two types of drives offer pure DC current, as a result they do not create 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 controlled rectifiers (SCRs) to rectify AC current into DC Current. These drives create a DC signal with AC pulses that match the firing of the SCRs. These pulses or absence thereof regarding 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 may also generate vibration problems.
Rectification: The first concept that should be understood when it comes to DC drives is usually rectification. Rectification may be the process of converting AC current into DC current. Pictured below is certainly a half wave rectifier and the resulting result. Only the positive part of the current Al passes through the rectifier.