Abstract: The electric power control system includes an electric power generation mechanism using renewable energy, a first DC bus line connected to the electric power generation mechanism and corresponding to a first voltage, a DC/DC converter connected to the first DC bus line and capable of converting the first voltage into a second voltage lower than the first voltage, a second DC bus line connected to the DC/DC converter and corresponding to the second voltage, a power generation apparatus electrically connected to the second DC bus line, and a power generation fuel generation apparatus electrically connected to the second DC bus line and connected to the power generation apparatus to generate fuel for use in power generation in the power generation apparatus.

Abstract: Provided is a power generation system including a photovoltaic unit arranged in a flight vehicle which provides a wireless communication service to a user terminal in a communication area formed over a ground, an electric storage unit which is connected to the photovoltaic unit and stores electric power generated by the photovoltaic unit, and a power conditioner which converts the electric power generated by the photovoltaic unit. The electric storage unit is connected, for example, in parallel to connection between the photovoltaic unit and the power conditioner, and the electric power stored in the electric storage unit is supplied to the power conditioner.

Abstract: An input buffer is provided and includes a current mirror circuit and a first amplifier. The current mirror includes first to second transistors. The first transistor is configured to couple a current source at a first node. The second transistor is coupled with the first transistor and is configured to output, according to a first current flowing through the first transistor, a second current at a second node. The first amplifier is coupled with the current mirror circuit at the second node, and includes a first transistor pair. A first breakdown voltage of the first transistor pair is smaller than a second breakdown voltage of the second transistor. The first transistor pair is configured to generate, in response to the second current and first to second input voltages, first to second voltages.

Abstract: A control system exhibits improved dynamic performance in a constant voltage (CV) control mode that is also invariant of the source type and operating points. The improvements may be achieved with minimal or potentially no additional parts to the control circuit by replacing a voltage-controlled current source with a voltage-controlled resistance as the control element in the system feedback loop. An input voltage from a device under test (DUT) is measured, a feedback control voltage is determined based at least in part on the input voltage to provide a CV mode control loop for the DUT, and the feedback control voltage added to the input voltage is applied to the DUT to operate the DUT in the CV mode.

Abstract: A cascoded switch system is disclosed. The cascoded switch system includes JFET and a MOSFET coupled in series between a drain terminal and a source terminal. The system further includes a drive circuit comprising a JFET driver configured to receive an input signal and to output a JFET-drive signal to a capacitor coupled in series with the gate of the JFET, a switch coupled between the gate of the JFET and the source terminal and configured to be responsive to the input signal, and a comparator to compare a JFET gate voltage against a threshold. The drive circuit further includes a MOSFET driver circuit to drive the MOSFET in a MOSFET on-state during an on-state of the input signal, and drive the MOSFET in one of a MOSFET off-state and the MOSFET on-state in response to a comparison signal from the comparator during an off-state of the input signal.

Abstract: There are provided methods and systems for operating electric vehicles. One example method includes generating, at a first component of the electric vehicle, a message in a first communication protocol and converting, at a first conversion module associated with the first component, the message into a power line communication protocol to form a first converted message. The method also includes transmitting the first converted message over a power line connecting the first component to a second component of the electric vehicle, and converting, at a second conversion module associated with the second component, the first converted message into a second communication protocol to form a second converted message. The second communication protocol is used by the second component. In addition, the method includes receiving the second converted message at the second component.

Abstract: In some examples, a pulser circuit is configured to provide a pulse signal in a first operational state, pre-charge components of the pulser circuit via a first signal path in a second operational state following the first operational state, wherein the first signal path includes first components having a first voltage tolerance and second components having a second voltage tolerance, the first voltage tolerance being less than the second voltage tolerance, and discharge a voltage of the pulser circuit to ground in a third operational state between the first operational state and the second operational state, and following the second operational state.

Abstract: A wide band-gap photo relay is provided. The wide band-gap photo relay includes first and second input terminals, first and second output terminals, a ground terminal, a light source, a photodiode array, and a depletion-mode wide band-gap semiconductor switch. The light source is configured to generate a light signal and has first and second ends coupled to the first and second input terminals, respectively. The photodiode array is disposed at a distance from the light source and has positive and negative terminals. The photodiode array senses the light signal and generates a voltage difference between the positive and negative terminals when the light signal is sensed. The positive terminal is coupled to the ground terminal. The depletion-mode wide band-gap semiconductor switch has a gate electrode coupled to the negative terminal, a drain electrode coupled to the first output terminal, and a source electrode coupled to the second output terminal.

Abstract: A high-side driver-circuit involves a charge-pump for driving a high-side transistor. The circuit includes a high-side transistor, a low-side transistor or unidirectional conducting-device, a bootstrap-capacitor, and a trickle-charge-pump connected between the output-node and ground. The trickle-charge-pump activates when the voltage at the output-node exceeds the voltage at the low-voltage power-supply-node, alternately charging a trickle-capacitor and transferring charge to the bootstrap-capacitor. This enables continuous replenishment of the bootstrap-capacitor, allowing for extended or indefinite high-side conduction periods, including 100% duty-cycle operation. The trickle-charge-pump incorporates an auto-on/auto-off functionality, synchronizing operation with the output-node-voltage.

Abstract: A power transmission apparatus 101 includes a communication unit 206 configured to wirelessly communicate with a power reception apparatus using an antenna, a power transmission unit 203 configured to wirelessly transfer power to the power reception apparatus using the antenna, a detection unit 204 configured to measure at least either a voltage or a current output from the antenna in a period where the transfer of the power is stopped and the communication by the communication unit 206 is not performed, and determine that there is an object different from the power reception apparatus based on the result of the measurement, and a control unit 201 configured to, if there is determined to be the object different from the power reception apparatus, restrict the transfer of the power.

Abstract: An automotive power system has circuitry, including a capacitor, inductor, and switch in series, connected such that a terminal of the switch is directly connected with only one phase leg of an inverter system controller between an electric machine and the inverter system controller and a terminal of the capacitor is referenced to a negative terminal of a traction battery. The switch is closed while the traction battery is being charged with energy from an AC grid, and open while the traction battery is not being charged.

Abstract: A gate driver circuit provides a soft-start current to a gate of a power switch during a soft-start period to soft-start the power switch. The gate driver circuit includes: a first current mirror circuit, configured to mirror a reference current according to a mirror ratio to generate a mirror output current; and a path switch coupled on a signal path between the mirror output current and the soft-start current. The soft-start current is generated according to the mirror output current. The path switch is configured to turn off the signal path when the power switch is off. The mirror ratio of the first current mirror circuit is reduced during a predetermined period in the soft-start period to compensate for a spike caused by the path switch being turned on during the soft-start period, such that the soft-start current is prevented from surging during the soft-start period.

Abstract: The present disclosure relates to an electromagnetic interference (EMI) filter for preventing noise emitted from a power line cable, and an isolated type active EMI filter having no additional elements on a power line. The EMI filter includes a common-mode (CM) choke disposed on a power source side, a Y-cap disposed on an EMI source side, and a sensing winding configured to sense a current. The EMI filter also includes an amplifier configured to amplify the noise current, and a transformer configured to inject a signal of the secondary coil into the Y-cap as a compensation signal.

Abstract: An electric work vehicle includes a frame and a traction device coupled to the frame. Furthermore, the electric work vehicle includes an electric motor configured to drive the traction device and an energy storage device configured to supply electric energy to the electric motor. Additionally, the electric work vehicle includes an electric charging port configured to receive electric power from a power source, with the electric charging port being electrically coupled to the energy storage device. Moreover, the electric work vehicle includes an electric outlet configured to provide electric power to a remote device, with the electric outlet being electrically coupled to the electric charging port and the energy storage device. In addition, the electric work vehicle includes a computing system configured to control a distribution of the electric power received by the electric charging port between the energy storage device and the electric outlet.

Abstract: To provide a technique enabling stable protection of a switching element at the time of short circuit by suppressing jumping of the voltage Vge between a gate terminal and a reference potential terminal at the time of occurrence of short circuit. A power semiconductor module having at least an upper arm, includes: a Zener diode connected between a gate terminal and a reference potential terminal and provided on the outside of a semiconductor chip of a switching element and provided on an insulating substrate; a casing which houses the insulating substrate; and a plurality of external electrodes provided to the casing and connected to the gate terminal and the reference potential terminal.

Abstract: Systems and methods for a tunable digitally controlled oscillator. In one aspect, an apparatus includes one or more lattices of delay stages. Multiple, different paths may be selected through the lattices. Each path begins at a first delay stage with an input connected to a signal input node and ends at a second delay stage with an output connected to a signal output node.

Abstract: A controller according to an embodiment includes a determiner and an output controller. The determiner determines a number of participants representing a number of electric power sources that are able to actually participate in supplying of electric power to an electric system. The output controller causes each of the electric power sources that are able to actually participate in the supplying to output, to the electric system, an electric energy determined by dividing a predetermined electric energy by the number of participants. The controller according to the embodiment may further include a granter. The granter grants an incentive to users who use the electric power sources that actually participate in the supply.

Abstract: The present disclosure includes an integrated circuit having a housing, an optical port exposed on an exterior of the housing, and gate driver circuitry configured to generate a drive signal at an output of the integrated circuit to drive a gate terminal of a wide band gap (WBG) power device. The integrated circuit may include an optical receiver coupled to the optical port and having an electrical output coupled to an input of the gate driver circuitry, the optical receiver configured to receive an optical signal via the optical port and generate an electrical signal at the electrical output based on the optical signal. The integrated circuit may also include a power supply system configured to convert a first voltage to one or more power supply voltages powering the gate driver circuitry, the first voltage being a voltage at a terminal of the WBG power device.

Abstract: This disclosure relates to a bootstrapped switching circuit. Example embodiments include a bootstrapped switching circuit (100) comprising: a positive output node (109+); a negative output node (109?); a first input node (106a) configured to receive a first input voltage (Vin1); a second input node (106b) configured to receive a second input voltage (Vin2). First, second third and fourth switches (101-104) are coupled between the input and output nodes (106a, 106b, 109+, 109?). A first negative bootstrapped level shifter (107a) and a first positive bootstrapped level shifter (107b) coupled between the first input node (106a) and a first clock signal circuit (110a) provide control signals to the first and second switches (101, 102). A second negative bootstrapped level shifter (108a) and a second positive bootstrapped level shifter (108b) coupled between the second input node (106b) and a second ground referenced supply line (110b) provide control signals to the third and fourth switches (103, 104).

Abstract: A frequency generator and a frequency correction method for a frequency generator, which have the purpose to provide a frequency correction technology that actively responds to continuous frequency fluctuations of a clock signal through a frequency measurement period of at least two unit periods. The frequency generator comprises: an oscillator which generates an oscillator clock signal; and a frequency correction circuit which selectively operates in one of a normal mode and a fast mode, which have different correction periods according to the state of the oscillator clock signal.