Abstract: A power transfer system includes an electric vehicle supply equipment (EVSE) for providing electric power to an electric vehicle (EV) and an electric power reception device mounted in the EV; a first conductor plate electrically connected to a primary-side circuit of the EVSE; a compensation circuit for transferring a power input signal of the EVSE to the first conductor plate; a second conductor plate disposed in the EV and connected to the electric power reception device; and a secondary-side circuit for transferring a power signal received by the second conductor plate to a load, where the electric power is transferred from the EVSE to the EV by capacitive coupling between the first conductor plate and the second conductor plate.

Abstract: A motor driving apparatus which drives a motor including a plurality of windings corresponding to a plurality of phases, respectively, includes: a first inverter including a plurality of first switching elements and connected to a first end of each of the windings; a second inverter including a plurality of second switching elements and connected to a second end of each of the windings; and a controller obtaining a vector corresponding to a voltage command of the motor by combining switching vectors which cause difference between a common mode voltage of the first inverter and a common mode voltage of the second inverter to be zero and configured to control the plurality of first switching elements and the plurality of second switching elements in a pulse width modulation method based on the obtained vector.

Abstract: A motor driving device drives a motor having a plurality of windings corresponding to a plurality of phases. The motor driving device includes: a first inverter configured to include a plurality of first switching elements and connected to first stages of the plurality of windings; a second inverter configured to include a plurality of second switching elements and connected to second stages of the plurality of windings; and a controller configured to fix switching states of the second switching elements and switch the first switching elements to compose target voltage vectors if the motor is driven in an open end winding type by operating the first inverter and the second inverter in a space vector pulse width modulation mode.

Abstract: Embodiments relate to a motor driving system comprising a power network between an inverter and a motor and a method for designing such motor drive system, the motor drive system comprising: an AC motor; an inverter unit for applying a voltage to the AC motor; a controller configured for controlling an output voltage of the inverter unit; and a power network circuit disposed between the inverter unit and the AC motor, wherein the power network circuit is configured with passive element.

Abstract: A motor driving apparatus includes: a first inverter including: a plurality of first switching elements and connected to a first end of each of the windings; a second inverter including: a plurality of second switching elements and connected to a second end of each of the windings; and a controller configured to control a switching state of the plurality of first switching elements and the plurality of second switching elements based on a driving mode of the motor in one sampling period.

Abstract: An apparatus configured for driving a motor, includes a first inverter including a first switching elements and connected to a first end of each of a windings respectively corresponding to a plurality of phases of the motor, a second inverter including a second switching elements and connected to a second end of each of the windings, a switches including first ends respectively connected to nodes to which the windings and the second switching elements are respectively connected and second ends connected to each other, and a controller configured to drive the motor in one of a first driving mode for driving the motor by maintaining the second switching elements in an open state and performing pulse width modulation control for the first switching elements and a second driving mode for driving the motor by performing pulse width modulation control for the first switching elements and the second switching elements.

Abstract: A motor driving apparatus which drives a motor including a plurality of windings corresponding to a plurality of phases, respectively, includes: a first inverter including a plurality of first switching elements and connected to a first end of each of the windings; a second inverter including a plurality of second switching elements and connected to a second end of each of the windings; and a controller obtaining a vector corresponding to a voltage command of the motor by combining switching vectors which cause difference between a common mode voltage of the first inverter and a common mode voltage of the second inverter to be zero and configured to control the plurality of first switching elements and the plurality of second switching elements in a pulse width modulation method based on the obtained vector.

Abstract: Embodiments relate to a motor driving system comprising a power network between an inverter and a motor and a method for designing such motor drive system, the motor drive system comprising: an AC motor; an inverter unit for applying a voltage to the AC motor; a controller configured for controlling an output voltage of the inverter unit; and a power network circuit disposed between the inverter unit and the AC motor, wherein the power network circuit is configured with passive element.

Abstract: The present invention relates to a method for performing a mutual communication between an input stage and an output stage while performing a power transmission therebetween by using an operation mode conversion of a converter even without a separate communication line.

Abstract: A wireless power transmitter is provided. The wireless power transmitter includes a power source configured to provide direct current (DC) power, an inverter configured to receive the DC power from the power source, invert the DC power into alternating current (AC) power, and output the AC power, a coil configured to generate a magnetic field based on an input of the AC power, a sensor configured to measure a voltage of the AC power output from the inverter and a current of the AC power output from the inverter, and at least one processor configured to identify an external voltage applied to a load of an electronic device based on the voltage of the AC power and the current of the AC power, wherein the electronic device is configured to be wirelessly charged using the magnetic field.

Abstract: A charging system for improving a power factor and a current quality in a grid stage is provided. The charging system includes a rectifying circuit that is configured to rectify a grid power and a converter that is configured to receive a voltage-current rectified by the rectifying circuit and convert the voltage-current into a charge voltage-current to be provided to a battery. A capacitor is connected across a connection end of the rectifying circuit and the converter. The converter includes a first high frequency switching circuit, a transformer, and a second high frequency switching circuit.

Abstract: A charging system for improving a power factor and a current quality in a grid stage is provided. The charging system includes a rectifying circuit that is configured to rectify a grid power and a converter that is configured to receive a voltage-current rectified by the rectifying circuit and convert the voltage-current into a charge voltage-current to be provided to a battery. A capacitor is connected across a connection end of the rectifying circuit and the converter. The converter includes a first high frequency switching circuit, a transformer, and a second high frequency switching circuit.

Abstract: Disclosed herein is a charging system using a wound rotor synchronous motor, capable of increasing a battery charging capacity while reducing the volume, weight, and/or cost of a vehicle increased due to an on-vehicle charging circuit. The charging system includes an inverter converting a DC output of a battery into a plurality of AC signals having different phases, a wound rotor synchronous motor having a plurality of stator coils, to which the AC signals having different phases are respectively input, and a field coil forming a mutual inductance with the stator coils, the field coil being installed in a rotor to form a magnetic flux using the DC output of the battery, and a controller allowing the battery and the field coil to be insulated from each other in a charge mode in which electricity from a grid is applied to the field coil of the wound rotor synchronous motor.

Abstract: Disclosed herein is a charging system using a wound rotor synchronous motor (WRSM), capable of reducing volume, weight, and cost of a vehicle increased due to an on-board charging circuit and increasing a battery charge capacity. The charging system using a wound rotor synchronous motor (WRSM) includes an inverter converting power of a battery into alternating current (AC) powers having a plurality of different phases, a WRSM having a plurality of stator coils each receiving AC power of a different phase and a field coil forming mutual inductance with the plurality of stator coils and installed in a rotor to form a magnetic flux using power of the battery, and a controller controlling the battery side and the field coil side are insulated from each other in a charge mode in which grid power is applied to the field coil side of the WRSM.

Abstract: A wireless power transmitter is provided. The wireless power transmitter includes a power source configured to provide direct current (DC) power, an inverter configured to receive the DC power from the power source, invert the DC power into alternating current (AC) power, and output the AC power, a coil configured to generate a magnetic field based on an input of the AC power, a sensor configured to measure a voltage of the AC power output from the inverter and a current of the AC power output from the inverter, and at least one processor configured to identify an external voltage applied to a load of an electronic device based on the voltage of the AC power and the current of the AC power, wherein the electronic device is configured to be wirelessly charged using the magnetic field.

Abstract: Disclosed herein is a power apparatus including a first motor, a second motor connected with the first motor in parallel, a driver configured to supply driving currents to the first and second motors, a current detector configured to detect the driving current of the first motor and the driving current of the second motor, a speed calculator configured to calculate a rotating speed of the first motor and a rotating speed of the second motor, and a controller configured to control the driver based on the rotating speed of the first motor, wherein the controller controls the driver so that the rotating speed of the first motor and the rotating speed of the second motor are the same as each other, when the rotating speed of the first motor and the rotating speed of the second motor are different from each other.

Abstract: Disclosed herein is a charging system using a wound rotor synchronous motor (WRSM), capable of reducing volume, weight, and cost of a vehicle increased due to an on-board charging circuit and increasing a battery charge capacity. The charging system using a wound rotor synchronous motor (WRSM) includes an inverter converting power of a battery into alternating current (AC) powers having a plurality of different phases, a WRSM having a plurality of stator coils each receiving AC power of a different phase and a field coil forming mutual inductance with the plurality of stator coils and installed in a rotor to form a magnetic flux using power of the battery, and a controller controlling the battery side and the field coil side are insulated from each other in a charge mode in which grid power is applied to the field coil side of the WRSM.

Abstract: Disclosed herein is a charging system using a wound rotor synchronous motor, capable of increasing a battery charging capacity while reducing the volume, weight, and/or cost of a vehicle increased due to an on-vehicle charging circuit. The charging system includes an inverter converting a DC output of a battery into a plurality of AC signals having different phases, a wound rotor synchronous motor having a plurality of stator coils, to which the AC signals having different phases are respectively input, and a field coil forming a mutual inductance with the stator coils, the field coil being installed in a rotor to form a magnetic flux using the DC output of the battery, and a controller allowing the battery and the field coil to be insulated from each other in a charge mode in which electricity from a grid is applied to the field coil of the wound rotor synchronous motor.

Abstract: Disclosed herein are a motor driving apparatus and a controlling method thereof. The motor driving apparatus includes a motor having a rotor including a permanent magnet, and a stator, an inverter to supply a driving power to the motor, and a control unit to estimate a parameter using a startup estimation when a rotation speed of the rotor is less than a preset startup speed, to estimate the parameter using a driving estimation with compensating for a dead time when the rotation speed of the rotor is equal to or greater than the preset startup speed and a torque of the rotor is equal to or less than a preset driving torque, and to estimate the parameter using the driving estimation without the dead time compensation when the rotation speed of the rotor is equal to or greater than the preset startup speed and the torque of the rotor exceeds the preset driving torque.

Abstract: A motor driving apparatus and a method of driving a plurality of permanent magnet synchronous motor (PMSM) using a single inverter is described. The motor driving apparatus includes a single power conversion apparatus configured to supply power to a plurality of motors and a control apparatus configured to control the power conversion apparatus to adjust a phase current ratio supplied to the plurality of motors from the single power conversion apparatus according to a requirement of each of the plurality of motors.