The analysis of the design of the current collection devices

The analysis of a design modern current collection devices used in space equipment is presented in the article. The main objective of this work is determination of the constructive methods and receptions that improve the output characteristics of the current collection device, preserving the reliability of functioning of the device throughout all term of active existence of the spacecraft in an orbit. The role of the current collection device in a spaceship power supply system is considered; the basic constructive elements of the device are described; the principles offunctioning of the device are stated. The main output characteristics of the current collection device - value of the voltage drop across the layer of the collector rings and the total power disseminated on the device are defined. The factors affecting described output parameters - change the actual contact area between the collector rings one kinematic contact pairs, the penetration of particles of dielectric material on the contact surface of the collector rings, the formation of non-conductive films. It shows the influence of axial and radial instability clips collector rings on the actual contact area of collector rings one kinematic contact pair, are stated. The reasons for the formation ofparticles of the dielectric material during operation of the device, formation of a film of dielectric material on the contact surface of the collector rings are described. The influence of the total radial bias force on the deformation of the contact rings one kinematic contact pair is considered. The relation between the cyclic loading of the outer collector rings and wave-like change of the moment of rotation of the output shaft of the device is determined. An experiment on the effects offluctuations in the torque of rotation of the output shaft of the device on the value of the voltage drop at the collector rings in a single layer is presented and described. The authors conclude that smoothing the peaks of the twisting moment will provide smoother and stable characteristic changes of the voltage drop across the collector layer of the rings, to reduce the average value of the voltage drop on each layer of the collector rings and, therefore, reduce the total power dissipated on the current collection device. It is suggested to include solutions to achieve axial and radial stability clips of current collector rings in the operation of the device in the future construction of current collection devices.