摘要:
A device including a mechanism detecting a position of a neutral of a power supply source for an electrical energy apparatus, such as a battery charger of an electric or hybrid motor vehicle, and a mechanism connecting a capacitor for limiting leakage currents between the neutral and an electrically conducting structure in which the apparatus is placed. The device can be used to limit leakage current during recharging of an electric or hybrid traction motor vehicle.
摘要:
A device including a mechanism detecting a position of a neutral of a power supply source for an electrical energy apparatus, such as a battery charger of an electric or hybrid motor vehicle, and a mechanism connecting a capacitor for limiting leakage currents between the neutral and an electrically conducting structure in which the apparatus is placed. The device can be used to limit leakage current during recharging of an electric or hybrid traction motor vehicle.
摘要:
A compensation system for compensating for a leakage current of an electric battery charger on board a vehicle and connected to a power supply network by an electrical ground, by a neutral phase and by at least one phase other than the neutral phase, a residual current differential protection device being interposed between the battery charger and the power supply network, a leakage current flowing from the battery charger to the power supply network on the electrical ground. The compensation system includes a compensation mechanism for compensating for a leakage current and configured to emit, on the electrical ground, a compensation current of same amplitude as the leakage current and of a phase that is the opposite of phase of the leakage current.
摘要:
A device for driving ultrasound piezoelectric actuators, on the basis of a DC voltage. The device includes an impedance matching branch mounted in parallel with the actuators and including a capacitor in series with a selection switch, which is closed and opened, at the same time as the selection switch of the actuator to be excited, so that the voltage across the terminals of the matching capacitor and the voltage across the terminals of the selected actuator are almost zero before the start and after the end of the injection. A method of controlling the matching switch makes it possible to benefit from the capacitive charge during the pulse train causing the injection, while circumventing abrupt discharges at the start of the train. Such a device and method may find application to the engines of motor vehicles, as one example.
摘要:
An air-conditioning system for a vehicle, that includes a module for controlling the air-conditioning group for adjusting the temperature inside the passenger compartment to a setpoint temperature, the control module being capable of correcting the temperature adjustment in the passenger compartment based on a received sunshine value in the passenger compartment. The system further includes a mechanism correcting the sunshine value to improve the correction of the temperature adjustment inside the passenger compartment particularly in cloudy conditions.
摘要:
A method of preparing a chicory extract enriched with sesquiterpene lactones is provided. The method includes performing an initial extraction chicory in a polar solvent, such as methanol or ethanol, at ambient temperature to form an alcoholic extract. The alcoholic extract is subsequently defatted with a non-polar solvent, preferably hexane or n-heptane. A second extraction of the defatted alcoholic extract is performed with a solvent which is more polar than the solvent used in the defatting process and less polar than the solvent used in the initial extraction, for example, it can be chosen from the group consisting of ethyl acetate, n-butanol, isopropanol, n-propanol, dichloromethane, acetonitrile, and mixtures thereof; resulting in a sesquiterpene lactones enriched extract, preferably containing at least 60% sesquiterpene lactones.
摘要:
The invention relates to a method for operation of a control device for at least one ultrasound piezoelectric actuator, comprising an a.c. converter with an assembly having a transformer connected to a voltage source by means of at least one controlled switch and providing an alternating driving voltage for the actuator such that: the voltage (Vc) at the connections for the load comprising the transformer, a resonant inductance and the actuator, is a square wave with the fixed chopping frequency (fr), the current (Ic) flowing in the load is a periodic signal with resonant frequency (fo), such that the operational mode of the switches is of the type hypo-discontinuous, hyper-continuous or hypo-continuous. Said modes are obtained from the relationship of the transformation of the transformer and the inductance of the resonance determined as a function of the equivalent capacitance of the actuator. The above finds application to the injection of fuel in a thermal engine on a motor vehicle.
摘要:
The invention concerns a device for controlling an ultrasonic piezoelectric actuator, electronically monitored from a computer controlling a continuous current voltage source. The invention is characterized in that it comprises a DC to DC converter, powered by the voltage source, delivering at least in output a direct current voltage (Vs) between two end terminals (B1, B2) parallel to which is connected at least an arm, consisting of two alternately controllable series-connected bridge switches and whereof the midpoint is alternately connected to the two output terminals of the DC to DC converter by a load consisting of at least an actuator in series with a resonance inductor.
摘要:
A device and method for protection of an electrical apparatus against touch currents, the device configured to be connected between a source of electrical power and a device onboard a motor vehicle, and including a circuit for detecting leakage currents and for estimating touch currents, configured to be connected to the electrical connection lines of the apparatus, a circuit measuring frame current, and a mechanism controlling operation of the apparatus according to the estimated level of the touch currents and the measured level of the frame current. The device and method can in one embodiment be used to protect against leakage currents during recharging of a hybrid or electrically driven motor vehicle.
摘要:
A method for controlling switches of a current rectifier installed on a motor vehicle, including: determining a neutral point current intensity required at an output of the rectifier; determining current vector coordinates making it possible to obtain the neutral point current in a Fresnel space including six sectors defined by six remarkable vectors; determining a half-sector including the current vector among twelve half-sectors forming the Fresnel space; determining a weighted vectorial combination of two remarkable vectors defining the Fresnel sector making it possible to obtain the current vector; switching the current rectifier switches to obtain the current vector in accordance with the weighting coefficients; and obtaining a free-wheel vector for remaining time of a cutting period minimizing voltage differences between the ground and the voltage rectifier during transition from one switching to another.