Abstract: The present invention concerns a linear amplifier for providing a sinusoidal waveform to a load, characterized in that the linear amplifier is composed of an asymmetric amplifier and a H-bridge module, the asymmetric amplifier comprises at least one transistor that amplifies a full wave rectified sinus signal that is transformed by the H bridge module into a sinewave signal that is provided to the load.

Abstract: The present invention concerns a method for determining the junction temperature of a power semiconductor using a temperature sensitive electrical parameter of a thermal sensitive electrical device in a system comprising the thermal sensitive electrical device, an external electrical circuit, a compensation module and a measurement module. The compensation module is composed at least of a first and a second switches. The invention: —puts the first switch in a closing state and puts the second switch in an opening state during a first period of time in order to measure a first set of voltages, —changes the state of the first switch and/or the state of the second switch or the state of at least one another switch during at least one another period of time in order to measure at least one another voltage, —determines a value of the temperature sensitive parameter using the measured voltages.

Abstract: The invention relates to a method for determining an output temperature of a fluid after flowing through a PTC heater with a PTC heating element. In the method a current of the PTC heating element, a supply voltage of the PTC heating element and a duty cycle of the supply voltage are determined, and the output temperature of the fluid is calculated based on the current (I), the supply voltage and the duty cycle (PWM). The invention also relates to a PTC heater for carrying out the method.

Abstract: A method of controlling a switch, including: a) applying a control signal to a control terminal of the switch, said control signal exhibiting at least one first switching between a switch turn-on control state and a switch turn-off control state; and b) applying a switch turn-off potential on said control terminal after a first delay starting at said first switching, the first delay being greater than the turn-off time.

Abstract: A method of controlling first and second switches of a switching cell, including measuring a current flowing through the first switch when the first switch is controlled to the off state, and setting a switching dead time according to the measurement.

Abstract: An assembly for powering a first circuit, including at least one ferrite bead in series with a diode between a first terminal of application of a first voltage and a first terminal of said first circuit.

Abstract: A device including at least two transformers, wherein: each winding of a transformer is electrically in series with a winding of another transformer, and the transformers have a transformation ratio different from one.

Abstract: Disclosed is an electric system including at least a first electric circuit, an electric device, a first printed circuit board supporting the first electric circuit, a device for shielding the electric device including at least a first shielding plate attached to the first printed circuit board, the first electric circuit including at least one inductor, characterized in that the inductor includes at least one first ferromagnetic part attached to the first printed circuit board and arranged to have at least one air gap with respect to the first shielding plate in such a way as to form a magnetic circuit with it.

Abstract: A method of controlling a switch, including: a) applying a control signal to a control terminal of the switch, said control signal exhibiting at least one first switching between a switch turn-on control state and a switch turn-off control state; and b) applying a switch turn-off potential on said control terminal after a first delay starting at said first switching, the first delay being greater than the turn-off time.

Abstract: A method of controlling first and second switches of a switching cell, including measuring a current flowing through the first switch when the first switch is controlled to the off state, and setting a switching dead time according to the measurement.

Abstract: A three-phase switching unit including three identical switching cells, each including a first switch and a second switch electrically in series, including a substrate having: a first level receiving, on conductive areas, back sides of integrated circuits forming said switches; and at least one second level comprising conductive areas of interconnection of vias between the first and second levels, the conductive areas of the different levels respecting a symmetry of revolution of order 3.

Abstract: A device including at least two transfomers, wherein: each winding of a transformer is electrically in series with a winding of another transformer, and the transformers have a transformation ratio different from one.

Abstract: A three-phase switching unit including three identical switching cells, each including at least one first electrically-controlled switch in series with at least one second spontaneous conduction switch, wherein the cells are arranged, around a conductive central area of a substrate, with a symmetry of revolution of order 3.

Abstract: An assembly for powering a first circuit, including at least one ferrite bead in series with a diode between a first terminal of application of a first voltage and a first terminal of said first circuit.

Abstract: A neutral point clamped multiple-level switching unit is disclosed, including four series-connected switches, where the electric path in the four switches approximately follows a T shape, two of the switches located in the middle of the series association being arranged in the foot of the T.

Abstract: A neutral point clamped multiple-level switching unit is disclosed, including four series-connected switches, where the electric path in the four switches approximately follows a T shape, two of the switches located in the middle of the series association being arranged in the foot of the T.

Abstract: A three-phase switching unit including three identical switching cells, each including at least one first electrically-controlled switch in series with at least one second spontaneous conduction switch, wherein the cells are arranged, around a conductive central area of a substrate, with a symmetry of revolution of order 3.

Abstract: A three-phase switching unit including three identical switching cells, each including a first switch and a second switch electrically in series, including a substrate having: a first level receiving, on conductive areas, back sides of integrated circuits forming said switches; and at least one second level comprising conductive areas of interconnection of vias between the first and second levels, the conductive areas of the different levels respecting a symmetry of revolution of order 3.

Abstract: The present invention relates to a method for manufacturing a material of olivine crystallographic structure of formula (I) AaZzMmSiO4 in which A is chosen from Li, Na, K and mixtures thereof, Z is chosen from Be, Mg, Ca, Sr, Ba, and mixtures thereof, M is chosen from Fe, Ni, Co, Mn, Cr, and mixtures thereof, a, z and m are the stoichiometric coefficients, respectively, of A, Z and M, and satisfy the following conditions: z>0, m>0, a>0, a+z+m?2, and 2?(4?a?2z)/m<4, said method comprising at least the steps consisting in i. having a material of olivine crystallographic structure of formula (II) ZzMmSiO4, obtained by oxidation of a material of olivine crystallographic structure of formula (III) Zz?MmSiO4, in which Z, M, z and m are as defined above and the stoichiometric index z? is such that z?>z, and ii. electrochemically reducing said material of formula (II) in the presence of a source electrode made of element A under conditions that are suitable for forming the material of formula (I).

Abstract: The present invention relates to a product constituted totally or partly by a material of olivine crystallographic structure of formula: AaZzMmSiO4 in which A is chosen from lithium (Li), sodium (Na), potassium (K) and mixtures thereof, Z is chosen from beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and mixtures thereof, M is chosen from iron (Fe), nickel (Ni), cobalt (Co), manganese (Mn), chromium (Cr), and mixtures thereof, a, z and m are the stoichiometric coefficients, respectively, of A, Z and M, and satisfy the following conditions: z>0, m>0, a>0, a+z+m?2, and 2?(4?a?2z)/m<4.