Abstract:
A downhole generator system including a controlled rectifier for receiving electrical power from a generator and outputting rectified electrical power. A control system controls the operation of the controlled rectifier and a chopper circuit connected to the output of the controlled rectifier connects a load selectively across the output of the controlled rectifier to regulate the output of the generator system. The control system controls the chopper circuit and/or the controlled rectifier based at least in part on a feedback signal representative of an electric current output by the generator system and an electric current passing through the chopper circuit.
Abstract:
A transformation system capable of efficiently transforming electrical power from one dc voltage to one or more other dc voltages or of regulating power flow within a network of constant nominal voltage; in each case without intermediate magnetic transformation. The transformation system is based on periodic and resonant delivery of charge from the first of two dc nodes to a system of capacitors, electrical reconfiguration of those capacitors, then delivery of power to one or more other dc nodes.
Abstract:
A voltage converter is switched among two or more modes to produce an output voltage matching a reference voltage that can be of an intermediate level between discrete levels corresponding to the modes. The output voltage is compared with the reference voltage to determine whether to adjust the mode.
Abstract:
A circuit for parasitically powering a device comprises diodes, a capacitor, and an inductor all disposed across a signal line, the inductor disposed in series between the diodes and the capacitor. The first diode is preferably a rectification diode, the second diode is preferably a flyback diode, and a DC/DC power supply circuit is preferably disposed across the capacitor. Multiple signal lines are contemplated. The parasitic voltage circuit can include a resistor and a MOSFET in series with the first diode and the inductor, more preferably an impedance control circuit that generates a pulse width modulated signal to actuate the MOSFET, and still more preferably, the impedance control circuit can turn the MOSFET on and off at a rate and duty cycle commensurate with maintaining a relatively constant current from the signal line through rectification diode Ds.
Abstract:
본 발명은 고압전 직류송전(HVDC)시스템과 연계되는 모듈러 멀티레벨 컨버터(MMC)의 서브모듈 제어기에 구동전원을 공급하도록 하는 MMC 컨버터의 서브모듈 제어기용 전원장치에 관한 것이다. 본 발명에 따른 전원장치는, 상호 간에 직렬연결된 MMC 컨버터의 서브모듈 내부에 DC전압을 저장하는 N개(N≥2,정수)의 에너지저장부와, 상기 N개의 에너지저장부에 브릿지 형태로 병렬로 연결된 다수의 전력용반도체를 포함하는 브릿지회로부; 및 상기 N개의 에너지저장부 중 n개(1≤n
Abstract:
Disclosed herein is a device, system, and method for a trickle charging system of non- inductive voltage boost (NVB) converter with built-in auto-dummy-load (ADL) for wide- range of charge storage devices i.e. small button-cell type batteries and super-caps using micro power pyro-electricity at Si-MOS sub-threshold voltage. A VLSI configuration of the system is also disclosed in embodiments. The system converts the pyro-electric material at MOS sub-threshold 0.37V for optimizing to the battery charging level at 1.45V. This system was proven at hardware level and found to be 98.8% power efficient. The designed IC can charge independently without any external components for up to luW max, but able to charge up to 20uA with external components. Thus it is considered to be a very versatile design.
Abstract:
Disclosed herein is a non-inductive voltage boost-converter (NVBC) for micro-power energy harvesting systems for energy storage and delivery applications. Current devices deliver a wide-range of micro-power having only up to 0.8V peak-voltage, but nominally 0.45V in lab test conditions. This voltage is not adequate in charging storage cells such as rechargeable batteries and also driving electronic circuits. Technology is in demand where a boost-converter must operate at MOS sub-threshold voltage (Sub-V TH ) limits. Disclosed herein is a novel NVBC device that has eliminated the need of an inductor coil and associated high-speed switching circuits; thus achieving higher efficiency. The disclosed invention applies a simple self-synchronizing technique to adapt the NVBC automatically to the low- frequency energy signal of a pyroelectric device. A novel NVBC is presented for stabilized output of NVBC (S-NVBC). In an embodiment, the S-NVBC achieves an efficiency of 86%.
Abstract:
Spannungsteiler (1) mit einer zwischen den Potentialen (P1, P2) einer Betriebsspannungsquelle angeordneten Reihenschaltung von Kapazitäten (Cl, C2), der eine verlustarme und kostengünstige Realisierung herbei führt, wobei zwischen den Potentialen (P1, P2) der Betriebsspannungsquelle zwei in Reihe geschaltete Transistoren (T1, T2) entgegengesetzten Leitungstyps mit verbundenen Steuereingängen (G) angeordnet sind, wobei sich zwischen den Leitungstypen (T1, T2) ein Mittelabgriff (M2) befindet und jeweils parallel zu einem Leitungstyp (T1, T2) eine Kapazität (Cl, C2) geschaltet ist, indem eine elektrisch leitende Verbindung zwischen dem Mittelabgriff (M2) der Leitungstypen (T1, T2) und dem. Mittelabgriff (M3) der Kapazitäten (C1, C2) besteht, wobei die Leitungstypen (T1, T2) so angeordnet sind, dass ein elektrischer Strom im ersten Leitungstyp (T1) den parallel zum zweiten Leitungstyp (T2) geschalteten Kondensator (C2) lädt und ein elektrischer Strom im zweiten Leitungstyp (T2) den parallel zum ersten Leitungstyp (T1) geschalteten Kondensator (Cl) lädt und die Steuereingänge (G) mittels des Steuerpotentials (P) angesteuert sind.