In a current detection apparatus, one or more first plate portions, one or more second plate portions, and one or more third plate portions of one or more magnetic shields are opposed to side surfaces of the one or more protrusions. The one or more protrusions, the one or more magnetic field detection elements, and one or more conductive members are respectively surrounded by the one or more magnetic shields, respectively. Consequently, the current detection apparatus is downsized and has high current detection accuracy.

An identification method includes supplying a motor power supply voltage from an identification device to a brushless DC motor via a power line, receiving the supply of the power supply voltage to rotate the brushless DC motor in accordance with a Pulse Width Modulation (PWM) signal output from a drive circuit of the brushless DC motor, superimposing an identification signal with a same frequency as that of the PWM signal on a power supply current flowing through the power line upon rotation of the brushless DC motor, acquiring the power supply current flowing through the power line, detecting the frequency of the identification signal superimposed on the power supply current, and identifying information about the brushless DC motor based on the detected frequency of the identification signal.

A method for determining an error in the angular position measurement of a timepiece motor having one or more phases, including: detecting (3) each instant (14) when the value of one of the back electromotive forces is zero, storing (4) a time corresponding to each detected instant, measuring (5) several time intervals between two instants (14) detected in the same revolution of the motor, comparing (6) the measured time intervals to reference time intervals to deduce the reference intervals to which they correspond, and determining (7) an angular position measurement error if the measured intervals do not correspond to the expected reference intervals. The invention also relates to a method for correcting the angular position measurement. Also, a determination and correction system for implementing the methods and a timepiece including such a system.

An electric system of an electromechanical power transmission chain is provided that includes a first capacitive circuit, converter equipment between the first capacitive circuit and an electric machine, a second capacitive circuit, and a direct voltage converter between the first and second capacitive circuits. The electromechanical power transmission chain is a parallel transmission chain where the electric machine is mechanically connected to a combustion engine and to one or more actuators. The electric system includes a control system for controlling the direct voltage converter in response to changes in a first direct voltage of the first capacitive circuit and for controlling the converter equipment in response to changes in a second direct voltage of the second capacitive circuit. The first direct voltage is kept on a predetermined voltage range whereas the second direct voltage is allowed to fluctuate in order to respond to peak power needs.

An electric system of an electromechanical power transmission chain is provided that includes a first capacitive circuit, converter equipment between the first capacitive circuit and an electric machine, a second capacitive circuit, and a direct voltage converter between the first and second capacitive circuits. The electromechanical power transmission chain is a parallel transmission chain where the electric machine is mechanically connected to a combustion engine and to one or more actuators. The electric system includes a control system for controlling the direct voltage converter in response to changes in a first direct voltage of the first capacitive circuit and for controlling the converter equipment in response to changes in a second direct voltage of the second capacitive circuit. The first direct voltage is kept on a predetermined voltage range whereas the second direct voltage is allowed to fluctuate in order to respond to peak power needs.

Embodiments of the present disclosure relate to a refrigeration system that includes a compressor configured to circulate refrigerant along a refrigerant loop, a motor configured to drive the compressor, and a variable speed drive coupled to the motor and configured to supply power to the motor. The variable speed drive includes a primary winding of a step down transformer coupled to an alternating current (AC) power source, a first secondary winding of the step down transformer, where the first secondary winding is configured to supply power at a variable supplied voltage to the motor when the motor operates below a threshold voltage, and a second secondary winding of the step down transformer, where the second secondary winding is configured to supply power at a fixed supplied voltage when the motor operates at or above the threshold voltage.

The invention relates to an electronic filter (100), intended to filter the supply power for electrical equipment, notably placed inside a motor vehicle, comprising: a busbar (10) intended to exchange electrical energy between an electrical power supply source and an electric machine, the busbar (10) comprising: at least one leadframe (12, 14) intended to transmit an electrical current between an electrical network and the electric machine, the at least one leadframe (12, 14) being partly overmolded with electrically insulating material, and an inductor (18) electrically connected to the at least one leadframe (12, 14),
characterized in that the electronic filter (100) comprises: an electronic board (30) comprising at least one capacitor (32a-32h), the at least one capacitor (32a-32h) of the electronic board (30) being electrically connected to a connection terminal (24, 26) of the at least one leadframe (14, 12) of the busbar (10).

The invention relates to an electronic filter (100), intended to filter the supply power for electrical equipment, notably placed inside a motor vehicle, comprising: a busbar (10) intended to exchange electrical energy between an electrical power supply source and an electric machine, the busbar (10) comprising: at least one leadframe (12, 14) intended to transmit an electrical current between an electrical network and the electric machine, the at least one leadframe (12, 14) being partly overmolded with electrically insulating material, and an inductor (18) electrically connected to the at least one leadframe (12, 14),
characterized in that the electronic filter (100) comprises: an electronic board (30) comprising at least one capacitor (32a-32h), the at least one capacitor (32a-32h) of the electronic board (30) being electrically connected to a connection terminal (24, 26) of the at least one leadframe (14, 12) of the busbar (10).

The power consumption of a circuit block outside a microcomputer and inside the same system is reduced. An electric power control system includes a first power supply circuit, a semiconductor device having a first circuit block operated by electric power supplied from the first power supply circuit, a state holding circuit that holds an operation state in the first circuit block according to the electric power, an electric power control circuit that controls the electric power supplied to the first circuit block according to the operation state, and a first terminal that outputs a first state signal corresponding to the operation state, a second power supply circuit that controls the supply of electric power according to the first state signal, and a second circuit block operated by the electric power supplied from the second power supply circuit.

The power consumption of a circuit block outside a microcomputer and inside the same system is reduced. An electric power control system includes a first power supply circuit, a semiconductor device having a first circuit block operated by electric power supplied from the first power supply circuit, a state holding circuit that holds an operation state in the first circuit block according to the electric power, an electric power control circuit that controls the electric power supplied to the first circuit block according to the operation state, and a first terminal that outputs a first state signal corresponding to the operation state, a second power supply circuit that controls the supply of electric power according to the first state signal, and a second circuit block operated by the electric power supplied from the second power supply circuit.