42results about How to "Low control power" patented technology

A switch module includes a collector connection, an emitter connection, and a gate connection. The switch module includes a plurality of parallel connected switching elements, e.g., insulated-gate bipolar transistors, each having a collector electrode electrically connected to the collector connection, an emitter electrode electrically connected to the emitter connection, and a gate electrode electrically connected to the gate connection. A fault protection device is operatively electrically connected between the gate connection and the switching elements and comprises passive electrical components which are selected such that in the event of a fault in at least one of the plurality of switching elements, a gate-emitter voltage is provided to the gate electrodes of non-faulty switching elements in a passive manner.

A bias correcting phase compensating rate limiter to control movement of a device may include a switching arrangement adapted to reverse a polarity of an error signal in response to a set of predetermined conditions that may include a commanded rate of movement of the device exceeding a rate limit capability of the device; a time rate of change of an input signal to the rate limiter being opposite in polarity to a difference between the input signal to the rate limiter and an output signal from the rate limiter; and a time rate of change of the input signal to the rate limiter being opposite in polarity to a difference between the output signal from the rate limiter and a signal corresponding to a pre-specified neutral or trim position of the device.

The invention discloses an embedded double valve core guide and control mechanism and a fluid control valve. The guide and control mechanism includes a valve body, a power level valve core and a pilotlevel valve core; the power level valve core is slidingly arranged in the valve body, a left oil return cavity, a left control cavity, a right control cavity and a right oil return cavity are formedbetween the power level valve core and the valve body, and an oil inlet hole is arranged in the power level valve core; the pilot level valve core is arranged in the power level valve core, and a leftinterval channel and a right interval channel are formed between the pilot level valve core and the power level valve core; when the pilot level valve core moves to the left relative to the power level valve core, a flow passage area between the left control cavity and the left oil return cavity and between the right control cavity and the oil inlet hole is increased, and the flow passage area between the left control cavity and the oil inlet hole and between the right control cavity and the right oil return cavity is reduced; when the pilot level valve core moves to the right relative to thepower level valve core, and a principle is same. The guide and control mechanism is simple in structure, small in volume, light in weight, low in cost, is small in a cross section of the pilot levelvalve core, is not easily influenced by liquid power, and is high in reliability.

The present disclosure relates to radio engineering, and more particularly to high frequency (HF) signal transmitting / receiving devices based on photoconductive switching elements. The HF signal transmitting / receiving device comprises: a signal electrode with a matching element arranged along its edge; a ground electrode; a dielectric layer between the signal electrode and the ground electrode; photoconductive elements (PE), each electrically connected to the signal electrodes and ground electrodes and arranged in a grid; excitation signal feed points and load elements electrically connected to matching elements. The light guide elements each have an off state in the absence of a control light flux and an on state in the presence of a control light flux. The switched-on light-guiding element forms a reflection profile of the signal provided from the excitation signal feed point. The distance between adjacent light guiding elements is less than half the wavelength of the excitation signal.

The invention belongs to the field of fluid transmission and control, and specifically relates to a damping half-bridge pilot control switching valve, which includes a valve body and a main valve core, and driving devices are respectively provided at both ends of the valve body, and the driving device is connected to the main valve core. A regulating chamber is formed between them, and the regulating chamber is provided with a pilot spool, and the valve body is provided with a first bridge for connecting the regulating chamber and the low-pressure oil outlet, and a second bridge for connecting the regulating chamber and the high-pressure oil inlet, There is a fixed damper in the first bridge or the second bridge. By driving the pilot spool, the adjustment chamber is connected or disconnected from the high-pressure oil inlet or the low-pressure oil outlet, forming a hydraulic force to move the main spool. The invention can greatly increase the driving force, reduce the volume of the electromagnetic driving device, reduce the input energy required for driving, and save energy and reduce emission.

The invention belongs to the field of fluid drive and control and particularly relates to a pilot proportional control type switch valve. The pilot proportional control type switch valve comprises a valve body and a main valve element. One end of the valve body is provided with a driving device. A first adjustment cavity is formed between the driving device and the main valve element. The other end of the main valve element is provided with a second adjustment cavity communicating with a high-pressure oil inlet. The main valve element is internally provided with a pilot valve element. The pilot valve element is driven to change the hydraulic pressure of the first adjustment cavity to form the hydraulic pressure difference so as to move the main valve element. The pilot proportional controltype switch valve provided by the invention has the following advantages that main valve element is hydraulically driven rather than direct electromagnetic driven, and driving force is greatly increased; the pilot valve element is designed in the main valve element, and the size is greatly reduced; the pilot valve element is designed for controlling the pressure of control cavities at the two ends of a main valve, the flow required for guide control is quite small, and thus, the driving force for driving the pilot valve element is quite small; the size of an electromagnetic driving device isfurther reduced, and the purpose of energy conservation and emission reduction are achieved.