摘要:
The invention relates to a method of regulating traffic on a main traffic route (2) through the control of an actuator (3) controlling access of vehicles to the main route (2) from an access route (7), in which: - at least one sensor (6) measures the density of vehicles on the main route (2), - a control device (4), linked to the sensor (6) and implementing a model-free estimation of the behaviour of the flow of the vehicles on the main route (2), calculates a first control variable - the control device (4) determines a control variable by taking account of the first control variable; - the control device (4) despatches the control variable to the actuator (3); - the actuator (3) controls access by permitting or denying the access of the vehicles on the main route (2) as a function of the control variable, so that the traffic on the main route (2) is regulated.
摘要:
The invention relates to an electric motor comprising a stator (10) having a laminated core defining notches (15) receiving conductors of a main winding (11), characterised by the fact that the electric motor comprises an isolated passive circuit comprising an auxiliary winding (13) wound in said notches, and capacitors (Cu, Cv, Cw) associated with the phase windings (14u, 14v, 14w) of said auxiliary winding. The invention also relates to a method for optimising such an electric motor.
摘要:
Voltage regulator (10), suitable for being connected in series between on the one hand an AC source (S) and on the other hand a load (C), comprising a magnetic circuit (2) comprising a first core (21) and a second core (22), at least one first inductive coil (2) coiled at least partially around the first core (21) and linked on the one hand to the AC source (S) and on the other hand to the load (C), and at least one voltage converter (4) comprising a second core (7) coiled around the second core (22), the regulator (10) being characterized in that the circuit (2) comprises a third decoupling core (3) and a virtual gap (EV), the virtual gap (EV) comprising at least one pair (50) of holes (5) in the third decoupling core (3), and a winding (6) wound between the holes (5) of each pair (50) of holes (5), and linked to a DC current source (8), the regulator (10) operating between at least two states.
摘要:
The invention relates to a current limiter (10) adapted to be connected in series between an AC current source (S) and a load (C). The limiter comprises a magnetic circuit (2) including a core (20) and at least one inductive coil (S) wound around the core (20) and connected to (i) the AC current source (S) and (ii) the load (C), said coil (1) having an impedance. The limiter is characterized in that it also comprises a virtual air-gap (EV) that includes: at least one pair (40) of holes (4) in the magnetic circuit (2); and a winding (3) which is wound between the holes (4) of each pair (40) of holes (4) and connected to a DC current source (5), said limiter (10) operating between at least two states.
摘要:
The present invention relates to a process for the direct dehydrogenation of a hydrocarbon, comprising the step of contacting said hydrocarbon with a catalyst at a temperature comprised between 400°C and 700 °C, wherein said catalyst consists of a carbon active phase that is coated on γ-AI2O3 support, said γ-AI2O3 support being a host matrix for said carbon active phase. It also relates to a process for the preparation of a composite comprising a carbon active phase coating on a γ-AI2O3 support, said γ-Al2O3 support being a host matrix for said carbon active phase, said process comprising the step of treating a support consisting of γ-AI2O3 at a temperature comprised of from 550°C to 650°, under an ethane stream for a period of at least 1.5 hours or under a stream of ethylbenzene, ethane or ethylbenzene diluted in an inert gas stream. Other subject-matters of the invention are a composite comprising a support consisting of γ-AI2O3 and a carbon active phase, wherein said γ-Al2O3 support is a host matrix for said carbon active phase, obtainable by a process as defined above, and the use of the composite, for oxygen- and/or steam-free direct dehydrogenation of ethylbenzene to styrene.