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• Control the Ratios of Continuously Variable Transmission by 2 Level Sevo Valve

  Nguyen Cong Thuat, Bui Viet Duc, Bui Hai Trieu

  Received: 31-05-2013 / Accepted: 22-08-2013

   Abstract PDF (VIETNAMESE)

  In continuously variable transmission, accurate control ofgear ratios matchingwell with loading conditions is of crucial importantance. There are many methods of control, of which control by hydrostatic hydraulic system is considered as an optimal choice. Electricity – hydraulics transmission is characterized by the ability to transmit large forces, adjust the position control accuracy and automation capabilities. This article reportsthe resultsof modeling and simulation control systems, adjusting the position to control the ratio of V-belt variator using electricity – hydraulics system by servo valve.

• Maximum Power Point Tracking Control Based on Improved Incremental Conductance Method

  Do Vu Luc, Kang Jin-song

  Received: 08-03-2016 / Accepted: 05-06-2016

   Abstract PDF (VIETNAMESE)

  Solar energy is clean, endless and does not pollute the environment. Solar energy system research plays a very important role to fully exploit the natural energy resources while traditional energy sources become scare. Maximum Power Point Tracker (MPPT) control for Solar panels considered as an indispensable part of the solar power system is applied in order to improve the efficiency of solar panels. This paper described and proposed a modifier of Incremental Conductance (INC) algorithms with Constant Voltage tracking (CVT) that were used to implement for Maximum Power Point control of Solar panels. Simulation results showed that modifier of INC algorithm had a better effect.