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Traditional mechanical OLTC has some disadvantages while changing the taps, such as causing arc, switching slowly, having high malfunction rate. This paper proposed a kind of intelligent OLTC which equips with vacuum interrupters controlled by permanent magnetic actuators (PMA) as its switching parts. In this paper, the overall structure and electrical circuit scheme of the OLTC were designed on the...
In this work, the bulk-gate controlled circuit to improve the power supply ripple ratio (PSRR) of a Low Dropout Regulator (LDO) which deteriorates due to lowering power consumption is proposed. Designing with 0.25 mum CMOS process, the simulation results by HSPICE shown that the proposed circuit provides a high performance of PSRR even though 1/10 of the power consumption is reduced compare to the...
This paper is concerned with the design and simulation of a pulse width modulation (PWM) rectifier for three-phase Permanent Magnetic motor drive. Based on the mathematical model of PWM rectifier, the dual-close-loop engineering design with decoupled feed-forward control is applied in the 3-phase voltage source rectifier. The objective to be reached is to realize unity power factor at the input ac...
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