Papers by Author: Zhan Shi Sheng

Abstract: In order to solve the problems of the high energy cost of the pump and the low efficiency of the motor, we developed a voltage regulator control system with an advanced LPC2368 chipset. By changing the motor voltage, the system ensures the motor work in a mode that the voltage of the free or light load is lower than the rated voltage. In this mode, the system ultimately saves energy. The simulation results indicated that the system not only can avoid the impact of instantaneous current and reduce the energy consumption, but also can save energy effectively

Abstract: Existing laser honing machines all utilize the motion mode of workpiece movement. But as to complex workpiece, this mode is inappropriate to use. For example, cylinder liner, pre-casted into the engine block, is not suitable to rotate when fixed on the chuck, because the block is irregular and heavy. This equipment uses the mode of laser head rotation and linear motion. The workpiece keeps still during the laser texturing process. In this paper, the structure design and control principle of the laser machine are narrated in detail. The process of the machine is a new method of laser micro-texturing, named as “single-pulse interval of the same point many times”. The method contributes to processing microscopic or macroscopic morphology and significantly reduces the negative thermal effects of laser processing

Abstract: A novel technique for power electronic switch current detection is introduced in this paper, in which the current-sensor is replaced by electronics circuit. According to the principle that the magnitude of the switch current is proportional to its turned-on voltage drop, the proposed technique utilizes the method of grasping the turned-on voltage drop of the MOSFET to reproduce its current waveform. The appearances of voltage drop of the MOSFET are analyzed and the current reconstruction principles are introduced. Experimental results are given to validate the proposed technique. It has the characteristics of simplicity and inexpensiveness and is worthy of adoption.