摘要:
The present invention relates to an electromechanical actuator comprising an electric motor (11) for driving an output shaft (4) in rotation via a reduction gear (20) and passive regulation means (30) allowing for control of the speed of rotation of the output shaft, and comprising a braking member (30), arranged between an output of the reduction gear and the output shaft to be driven, said braking member being arranged to ensure two different braking levels depending on the direction of rotation of the shaft, characterized in that the braking member is of hydraulic type and comprises fluid decantation means (33) between two chambers (34, 35) decanting under the effect of the rotation of the output shaft through a selective drawing member (41) which, depending on the direction of rotation of the actuator, opposes two distinct resistances to the decantation of the fluid from one chamber to the other.
摘要:
An electromechanical actuator comprising an electric motor (11) for driving an output shaft (4) in rotation via a reduction gear (20) and passive regulation stage (30) allowing for control of the speed of rotation of the output shaft. A braking member is arranged between an output of the reduction gear and the output shaft to be driven, the braking member being arranged to ensure two different braking levels depending on the direction of rotation of the shaft. The braking member is of hydraulic type and comprises a paddle (33) for transferring fluid between two chambers (34, 35) under the effect of the rotation of the output shaft, transferred fluid passing through a selective drawing member (41) which, depending on the direction of rotation of the actuator, opposes two distinct resistances to the decantation of the fluid from one chamber to the other.
摘要:
The invention relates to a method for treating a silicon substrate for the production of photovoltaic cells against reduction in yield during the illumination of said photovoltaic cells. The invention also relates to a method for producing photovoltaic cells from the treated substrate. To said end, the invention relates to a method for treating a silicon substrate for the production of photovoltaic cells, said method including the following steps: a) providing a silicon substrate obtained from a metallurgically purified load, and b) annealing said substrate by heating the substrate to a temperature between 880° C. and 930° C. for a duration of between one and four hours, preferably at a temperature of 900° C., give or take 10° C., for two hours, give or take 10 minutes.
摘要:
Method for metallization of at least one photovoltaic cell comprising a substrate based on a semiconductor with a first type of conductivity, a layer doped with a second type of conductivity produced in the substrate and forming a front face of the substrate, an antireflection layer produced on the front face of the substrate and forming a front face of the photovoltaic cell. The method comprises at least the steps of: a) producing at least one metallization on the front face of the photovoltaic cell, b) a first annealing of the photovoltaic cell at a temperature between around 800° C. and 900° C., c) producing at least one metallization on the rear face of the substrate, d) a second annealing of the photovoltaic cell at a temperature between around 700° C. and 800° C.
摘要:
The invention relates to a method of purifying a crystalline silicon substrate and to a process for producing a photovoltaic cell. The method of purifying a crystalline silicon substrate according to the invention is of the type that includes a step of extracting impurities by external gettering and which includes, before said step of extracting the impurities by external gettering, at least one step of rapidly annealing the substrate at a temperature of between 750° C. and 1000° C. inclusive for a time of between 1 second and 10 minutes inclusive. The invention is particularly applicable in the photovoltaic cell field.
摘要:
A method of making an ice skate blade that comprises providing an upper member made of aluminum and a bottom member made of stainless steel. The upper member has a bottom portion comprising one of a recess and a projection and a top portion having attachment portions for allowing attachment of the upper member to a blade holder. The bottom member has a top portion comprising the other one of a recess and a projection and a bottom portion having a surface for contacting ice. The method further comprises joining the upper member and the bottom member together by registering the one of a recess and a projection of the upper member with the other one of a recess and a projection of the bottom member for making the blade.
摘要:
Methods of moving an aircraft undercarriage that is movable between a retracted position and a deployed position generally include: using a rotary electromechanical type drive actuator coupled to a portion of the aircraft undercarriage to raise it from the deployed position to the retracted position; disengaging the drive actuator during a descent of the undercarriage from the retracted position to the deployed position and using a hydraulic linear shock absorber coupled to a portion of the undercarriage to regulate the rate of descent and to absorb shock on arrival of the undercarriage in the deployed position; and neutralizing the shock absorber while raising the undercarriage.
摘要:
To reduce degradation, by the LID effect, of the conversion efficiency of photovoltaic cells made of crystalline silicon, one or more steps of controlled introduction of voids into the silicon are carried out by one or more steps chosen from among: siliciding, nitriding, ion implantation, laser irradiation, mechanical bending stress applied on one face of the silicon substrate, in combination with a temperature promoting the formation of voids in the substrate. These voids make it possible to reduce the level of interstitial oxygen by an effect of diffusion of VO complexes and precipitation of oxygen. The introduction of voids has the other effect of reducing the level of autointerstitials, and therefore of limiting the formation of interstitial boron. The phenomena of LID by activation of BiOi2 complexes are thus limited. This applies notably to photovoltaic cells based on monocrystalline or polycrystalline silicon having a high concentration of boron and oxygen.
摘要:
An ice skate blade assembly comprising: (a) an ice skate blade comprising first and second hooks projecting upwardly; (b) a blade holder having a bottom portion having a longitudinal groove extending therealong for receiving the upper edge of the ice skate blade and wherein the bottom portion further defines a recess extending upwardly from the longitudinal groove for receiving the first hook; and (c) a single actuator having a wall accessible by a finger of a user, a resilient portion having an end wall facing a section of the inner surface of the second pedestal and a base with an inner wall and a bottom wall having an upper surface, an end and a bottom surface, wherein the inner wall and the bottom wall define therebetween a channel opens to the bottom aperture for receiving the second hook.
摘要:
An ice skate blade assembly comprising: (a) an ice skate blade comprising first and second ends, an ice contacting surface and an upper edge opposed to the ice contacting surface, the upper edge comprising first and second hooks projecting upwardly proximate to one of the first and second ends respectively, the second hook having an upper surface, an end and a bottom surface; (b) a blade holder having first and second pedestals and a bottom portion having a longitudinal groove extending therealong for receiving the upper edge of the ice skate blade and wherein the bottom portion further defines a recess extending upwardly from the longitudinal groove for receiving the first hook and wherein the second pedestal has an inner surface defining a cavity with a bottom aperture opens to the longitudinal groove; and (c) a single actuator at least partially mounted within the cavity, the single actuator having a wall accessible by a finger of a user, a resilient portion having an end wall facing a section of the inner surface of the second pedestal and a base with an inner wall and a bottom wall having an upper surface, an end and a bottom surface, wherein the inner wall and the bottom wall define therebetween a channel opens to the bottom aperture for receiving the second hook.