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This paper reports a 3.0 THz detector which can detect the terahertz wave radiated by a quantum cascade laser (QCL) working at pulse mode. The detector was implemented in a 65 nm silicon CMOS process. The chip size is 1.5×l.5 mm2 including bonding pads. THz detector using FET is based on plasma wave theory proposed by Dyakonov and Shur which allows detection of THz radiations far beyond the FET devices...
The capacitor-current-feedback active damping method is attractive for high-order-filter-based high power grid-tied inverter when the grid impedance varies within a wide range. In order to improve the system control bandwidth and attenuate the high order grid background harmonics by using the quasi-PR control method, the digital delay is preferred to be reduced as much as possible. However, when the...
The objective of this paper is to propose an energy storage converter (ESC) for microgrid applications. Microgrid integrates distributed generators, load and ESC through various interface power electronic converters to form a small power system. Based on the design of the converter, microgrid can operate normally in grid-connected mode or standalone mode. In grid-connected mode, the grid current controller...
The rapid progress of large-scale clean energy accessing to the grid promotes the development of DC grid technologies. HVDC (high voltage direct current) circuit breaker as one of the key equipment of the DC grid has gradually attracted more and more attentions. Direct current is more difficult to be interrupted comparing to alternative current because of without natural zero-crossing, especially...
This paper presents an open-loop synchronized-off voltage mode (SFVM) control scheme for a two-phase interleaved boost converter with master-slave strategy for PFC applications. Interleaving CCM/DCM boundary mode boost converters, however, is complicated because of the variable-frequencies nature of the operation. The problem of current divergence is often encountered in the Slave converter. In this...
A critical-mode (CRM) operation has recently been used for low-to-medium power-level power factor correction (PFC) boost converter circuit. In theory, this circuit provides very good power factor and little distortion. However, in a real circuit, the input current of such operation suffers from significant input current distortion. In this paper, the phenomenon of input current distortion was analyzed,...
The nonlinear friction characteristics in line cylinder pneumatic servo control system are analyzed. The friction can be seen as the disturbance in the global sliding mode variable structure control (SMVSC). The system is robust during the whole response process, by changing controller structure or adjusting control parameters to suppress the disturbance. Numerical simulation shows that the SMVSC...
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