Design and numerical characterization of a new planetary transmission

This paper describes the design and characterization of a novel planetary transmission that can be used to adjust the transmission ratio according to the externally applied load. A basic modeling has been formulated to characterize both its design and operation. A detailed 3D CAD model has been proposed in order to investigate the operation feasibility of the proposed design solution. A proper dynamic model has been developed within MSC ADAMS software. Simulation tests have been carried out and results are discussed to validate the proposed design solution

New design of the LED current controller

In the work traditional and innovative methods for constant current LED drivers have been studied. The low-cost solutions for energy effective low lighting flicker current regulation have been proposed. The advantage is due to fact that auxiliary switch-mode regulator converts only small part of output power. The proposed solution can be used in LED drivers to reduce pulsations of the light flux, as well as in driverless AC LED modules to monitor LED currents and/for power correction

Numerical check of a 2DOF transmission for wind turbines

The aim of the paper is to present a planetary gearbox for wind turbine. At constant wind power input the planetary gearbox is able to provide variable speed of the output shaft. The main purpose of the differential transmission is on the capability to adapt the operation to variable loading of wind. A CAD model has been proposed in order to investigate the operation feasibility of the proposed design solution. A proper dynamic model has been developed in ADAMS software. Simulation tests have been carried out and results are discussed to validate the proposed design solution

THEORY OF A NEW DRIVE SYSTEM FOR MANIPULATORS

The production operation of the module includes stages: acceleration, breaking and the installed motion. Optimum on power and sizes the drive of the module of the manipulator should overcome the force matching a variable load at different stages of operation at constant power of an engine. For this purpose it is offered to use the adaptive mechanical drive containing the electric motor and an adaptive gear variator with constant engagement of toothed wheels. The adaptive gear variator provides the variable transfer ratio only owing to the mechanical properties lost-free energy on its transformation and without control means

A CAD DESIGN OF A NEW PLANETARY GEAR TRANSMISSION

This paper presents the design and characterization of a new planetary gear transmission with two degrees of freedom.  The main purpose of the planetary gear transmission is on the capability to adapt the operation to variable loading. Designed adaptation provides a motion of output link with a speed that is inversely proportional a loading of the link.  A detailed 3D CAD model has been proposed in order to investigate the operation feasibility of the proposed design solution

Investigation of the quality of arrayed data transmission through wireless networks

This paper investigates the quality of communication in wireless networks and connection quality evaluation on the basic parameters of indoor and outdoor applications with produced experimental data. The analysis of the influence of radio waves propagation conditions of in the wireless communication networks were performed at the different types of medium. Comparison of the radio waves propagation indoors and outdoors has been done. Also, the effect of the obstacles of various materials on radio propagation was performed

THEORY OF A NOVEL MECHATRONIC SYSTEM

Mechatronics system should provide operated motion of the end-effector overcoming variable loading at constant input power of a drive. Adaptive mechatronics system is characterized by function of a mismatch of input and output displacements. Input displacement is constant on time and is set by displacement of the engine. Output displacement is determined by an adaptive transfer mechanism, depends on output loading and is a variable in real-time mode. The mismatch of displacements determines control function of mechatronic system

A CAD DESIGN OF A NEW PLANETARY GEAR TRANSMISSION

This paper presents the design and characterization of a new planetary gear transmission with two degrees of freedom.  The main purpose of the planetary gear transmission is on the capability to adapt the operation to variable loading. Designed adaptation provides a motion of output link with a speed that is inversely proportional a loading of the link.  A detailed 3D CAD model has been proposed in order to investigate the operation feasibility of the proposed design solution

The researching of the dynamic properties of long-wheelbase platforms for the transportation of large-capacity containers

The modern market of transport services requires the saturation of the car fleet, a specialized type of construction designed to carry a special kind of cargo, for example, heavy cargo containers, various automotive equipment, etc. It is necessary to increase the speed of movement and safety of the goods carried. A review of the work related to the improvement of the running parts of freight cars showed that over the past 50 years a large number of different types of freight wagon carriages have been developed. At the same time, the main attention was paid to the improvement of individual elements during the creation of bogies, and the problem of the wear of the part of the trolleys was solved while preserving the unchanged ideologues lay in the CRI-Х3 trolley. However, the question of the choice of constructive schemes and rational parameters of the spring suspension of bogies is not completely resolved

A novel regenerative snubber circuit for flyback topology converters

Switch mode power suppliers based on isolated flyback topology have voltage stresses on semiconductor switches caused by transformer leakage inductance. Those voltage stresses have to be mitigated by implementing active or passive clamp preferably with partial leakage energy recovery. In this paper a new integrated semi-active regenerative (lossless) snubber is proposed. The proposed snubber topology is featured by the snubber inductor integrated into the main transformer thus decreasing component count and saving the PCB space. Partial coupling of snubber inductor with a secondary side makes it possible to recover part of the transformer leakage energy directly to the secondary side with potential to increase snubber efficiency. The operation of the proposed snubber is analyzed and simulation results are presented. Interesting is that with the proposed snubber various side effects can be reached like reduction of RMS current in secondary side, ZCS and ZVS modes for secondary side rectifier and primary main switch along with achieved primary goal – voltage stress limitation and transformer leakage energy recovery