摘要:
A pump assembly including a first subassembly and a second subassembly. The first subassembly includes a fluid conduit; an inlet fluidly coupled to the liquid reactant dispenser and the fluid conduit; an outlet fluidly coupled to a reaction chamber and the fluid conduit; and a diaphragm, defining a portion of the fluid conduit, that flexes to pump the liquid reactant from the inlet to the outlet. The diaphragm preferably includes an actuation point coupled to the diaphragm, wherein the liquid reactant is substantially contained within the first subassembly during pumping. The second subassembly is couplable to the first subassembly, and is fluidly isolated from the liquid reactant. The second subassembly includes an actuator that couples to the actuation point, wherein operation of the actuator causes pumping action.
摘要:
A stacked arrangement of metal oxide varistors includes a plurality of metal oxide varistors with each metal oxide varistor of the plurality of metal oxide varistors having a first lead on a first surface and a second lead on a second surface, the first surface and the second surface being opposite facing surfaces of each metal oxide varistor. The first lead and the second lead of adjacent metal oxide varistors, when placed in a stacked arrangement, are arranged, preferably asymmetrically, so as not to interfere with one another, thereby result in a more compact stacking of metal oxide varistors, as compared to arrangements known to the state of the art. The stacked arrangement of metal oxide varistor can be mounted on printed circuit boards, in addition to a variety of other uses.
摘要:
Spacing of metal oxide varistors (“MOVs”) when used for surge suppression or surge protection will determine the number that can be used and the amount of protection achieved in a limited space. By changing the way the leads are attached to the metal oxide varistors (“MOVs”), tighter spacing, higher densities, and more surge suppression and protection can be placed in the same sized location. Leads are attached to metal oxide varistors (“MOVs”) to allow the metal oxide varistors (“MOVs”) to be placed side by side without the lead of one metal oxide varistor (“MOV”) interfering with the lead of a different metal oxide varistor (“MOV”)
摘要:
An apparatus for controlling electrical power distribution to an electrical charging device includes a power input that is to be connected to a power source for receiving electrical current from the power source and a power output that is to be connected to at least one electrical charging device having a run mode and a standby mode for supplying the electrical current to the one or more electrical charging devices. A device for sensing when the electrical current to the electrical charging device is below a predetermined threshold, when the electrical charging device is in the standby mode, and for sensing when the electrical current is above the predetermined threshold when the electrical charging device is in the run mode is provided, along with a device for interrupting the electrical current to the electrical charging device when the electrical current falls below the predetermined threshold as the electrical charging device transitions from the run mode to the standby mode as determined by the sensing device. A further device resets and powers the electrical charging device when the electrical current increases above the predetermined threshold as the electrical charging device transitions from the standby mode to the run mode as deter-mined by the sensing device.
摘要:
A surge suppression or surge protection device for affording enhanced safety by disconnecting a protected device should a fault occur, and which is preferably formed as part of an electrical power strip, preferably includes a plurality of fuses with at least one fuse being a thermal fuse and a heating element in proximity to the thermal fuse for opening the thermal fuse, when heated. The heating element may preferably be a positive coefficient self-regulating heating element.
摘要:
A device for controlling a power distribution to subsystems, has a power input to be connected to a power source, a primary power output to be connected to a primary device; at least one secondary power output to be connected to at least one secondary device; sensing unit for sensing when a current level falls below a threshold in response to the primary device being turned off or going into a standby mode and when the current level raises above a threshold in response to the primary device being turned on; executing unit operatively connected with the sensing unit and operative for interrupting a power supply to the at least one secondary device when the sensing unit sense the current level below the threshold and supplying power to the at least one secondary device when the sensing unit sense the current level above the threshold correspondingly and adjusting unit for adjusting the threshold depending on a current of the primary device during periods of turning off, going into standby mode, and turning on.
摘要:
Passive recovery of liquid water from the cathode side of a polymer electrolyte membrane through the design of layers on the cathode side of an MEA and through the design of the PEM, may be used to supply water to support chemical or electrochemical reactions, either internal or external to the fuel cell, to support the humidification or hydration of the anode reactants, or to support the hydration of the polymer electrolyte membrane over its major surface or some combination thereof. Such passive recovery of liquid water can simplify fuel cell power generators through the reduction or elimination of cathode liquid water recovery devices.
摘要:
A stacked arrangement of metal oxide varistors includes a plurality of metal oxide varistors with each metal oxide varistor of the plurality of metal oxide varistors having a first lead on a first surface and a second lead on a second surface, the first surface and the second surface being opposite facing surfaces of each metal oxide varistor. The first lead and the second lead of adjacent metal oxide varistors, when placed in a stacked arrangement, are arranged, preferably asymmetrically, and having the same voltages so as not to interfere with one another, thereby result in a more compact stacking of metal oxide varistors, as compared to arrangements known to the state of the art. The stacked arrangement of metal oxide varistor can be mounted on printed circuit boards, in addition to a variety of other uses.
摘要:
A fuel cell system for powering a work load includes a fuel cell stack and a shunt regulator having a threshold detection; transistorized power switching element, and a dump load. The threshold detection element identifies when an abnormally high voltage rises. The power switching element routes power from the high voltage buss to the dump load. The dump load acts as an electrical energy sink, and may provide dissipated energy to the fuel cell stack in the form of heat. The switching element can also shunt power to the dump load when a digital control signal is set, for example at startup or during cold start conditions.
摘要:
Passive recovery of liquid water from the cathode side of a polymer electrolyte membrane through the design of layers on the cathode side of an MEA and through the design of the PEM, may be used to supply water to support chemical or electrochemical reactions, either internal or external to the fuel cell, to support the humidification or hydration of the anode reactants, or to support the hydration of the polymer electrolyte membrane over its major surface or some combination thereof. Such passive recovery of liquid water can simplify fuel cell power generators through the reduction or elimination of cathode liquid water recovery devices.