Gear adaptive variator is the toothed tranny with the variable transfer ratio which is adapting to the adjustable loading. Unsuccessful attempts of creation of a equipment variator were 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 had been proved that this kinematic chain with shut 
contour possesses the effect of drive adaptation. The apparatus variator can be performed in the type of the shut differential mechanism. The external variable technical loading changes the transfer ratio itself with no 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 gear variator is based on discovery «Impact of drive adaptation in mechanics» which is certainly released in leading editions of globe press. In the paper the bases of the theory of a equipment adaptive variator are shown.
There are different types 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 plant life have a bank of batteries supplying DC Variator Gearbox current to emergency oil pumps that supply oil to the bearings of a turbine during a crisis shutdown. A second way to obtain DC current could be from a (Motor-Generator) MG established. In cases like this, the motor drives a DC generator that generates the DC current. These first two types of drives offer pure DC current, for that reason 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 lack thereof regarding failed SCRs and or gating complications produce vibration signals which can be analyzed to determine 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 section of the current Al passes through the rectifier.
Full Wave Rectification: The above plot shows a standard spectrum from a current probe upon the lead to a DC drive. As can be seen, the only main component is at 360HZ. This is normal because of the non-sinusoidal nature of the existing waveform.
