Gear adaptive variator is the toothed tranny with the variable transfer ratio which is definitely adapting to the adjustable loading. Unsuccessful tries of creation of a gear variator were undertaken repeatedly. The main problem is-maintenance of constant engagement of cogwheels of a variator. Your choice of this problem could be based on utilization of a kinematic chain with two degrees of freedom. Earlier it was proved that this kinematic chain with closed contour possesses the effect of power adaptation. The apparatus variator can be performed in the type of the shut 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 devices with variable technological level of resistance (for example, adaptive gearbox of car). The theory of a gear variator is founded on discovery «Effect of force adaptation in mechanics» which is definitely published in leading editions of world press. In the paper the bases of the theory of a equipment adaptive variator are provided.
There are different types of DC drive setups with the designation depending upon the foundation of their DC current. This is often the case in emergency back-up systems. For example, power plant life have a bank of batteries supplying DC current to emergency oil pumps that supply oil to the bearings of a turbine during an emergency shutdown. A second way to obtain DC current could be from a (Motor-Generator) MG arranged. In this case, the engine Variator Gearbox drives a DC generator that generates the DC current. These 1st two types of drives offer pure DC current, for that reason they do not produce any significant electrically induced signals when it comes to vibration. The last kind of DC drive, and the one which will be discussed in this paper, uses silicon controlled rectifiers (SCRs) to rectify AC current into DC Current. These drives create a DC transmission with AC pulses that correspond to 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 source of the defect. Improper tuning of variable speed drives can also generate vibration problems.
Rectification: The first concept that needs to be understood in regards to DC drives is definitely rectification. Rectification is the process of converting AC current into DC current. Pictured below is usually a fifty 
percent wave rectifier and the resulting output. Only the positive section of the current Al passes through the rectifier.
Complete Wave Rectification: The over plot shows a standard spectrum from a current probe upon the lead to a DC drive. As can be seen, the only main component reaches 360HZ. That is normal due to the non-sinusoidal nature of the existing waveform.