Abstract: An ophthalmologic apparatus, includes: a first concave mirror and a second concave mirror having a concave surface-shaped first reflective surface and a concave surface-shaped second reflective surface; an SLO optical system configured to project light from an SLO light source onto a subject's eye via the first concave mirror and the second concave mirror, and to detect returning light from the subject's eye; a first optical scanner configured to deflect the light from the SLO light source to guide the light to the first reflective surface; a second optical scanner configured to deflect light reflected by the first reflective surface to guide the light to the second reflective surface; an OCT optical system including a third optical scanner, and configured to split light from an OCT light source into measurement light and reference light, to project the measurement light deflected by the third optical scanner onto the subject's eye, and to detect interference light between returning light of the measurement l

Abstract: A micro crystal oscillator includes: a tank body including a tank bottom and a side wall, the tank bottom including an inner surface and an outer surface, wherein the side wall is disposed on a periphery of the inner surface of the tank bottom to form a recess together with the tank bottom; a plurality of patterned electrodes arranged on the outer surface; a first patterned circuit arranged on the side wall; a plurality of vias disposed in the tank body for electrically connecting at least one of the patterned electrodes to the first patterned circuit; an oscillating chip arranged on the inner surface and located in the recess; and a plurality of connecting wires located in the recess and respectively connected to the oscillating chip and the first patterned circuit in a wire bonding manner; wherein the micro crystal oscillator is of millimeter level.

Abstract: A method for controlling a wind farm, which is operated by means of a wind farm control unit and comprises a multiplicity of wind power installations having wind power installation controllers and being connected to one another via a common wind farm grid, which is connected to an electrical power supply grid of a grid operator by means of a wind farm transformer, comprising the following steps: reception of at least one fault bit at the wind farm control unit, in particular at least one fault bit of the grid operator, deactivation of all external setpoint value specifications at the wind farm control unit apart from those of the grid operator after reception of the fault bit, activation of a closed-loop fault case control implemented in the wind farm control unit after successful deactivation of all external setpoint value specifications apart from those of the grid operator.

Abstract: In a power supply control apparatus, a control unit is configured to execute: discharge control of turning off a first switch and turning on a second switch to discharge electric power from a backup power supply to a backup load; first charge control of turning on the first switch and turning off the second switch to charge the backup power supply via a charging DC/DC converter; and second charge control of turning on the first switch and turning on the second switch to charge the backup power supply via the second switch. In charging the backup power supply, the second charge control is executed only in a case in which a current value of a charging current is equal to or greater than a first predetermined value and equal to or less than a second predetermined value that is greater than the first predetermined value.

Abstract: A system for stabilizing an alternating voltage grid has an inverter, which can be connected to the alternating voltage grid, and is configured to exchange reactive power with the alternating voltage grid. The system further has an inductor arrangement with variable inductor coils, which can be connected to the alternating voltage grid, and a control device, which is configured to control a reactive power in the alternating voltage grid by use of the inverter and by use of the inductor arrangement.

Abstract: An increase in the capacity of a power storage unit is effectively suppressed. An in-vehicle backup power source control apparatus includes a discharge unit, a control unit, and a temperature obtaining unit. The control unit controls a discharge operation such that an output voltage of the discharge unit reaches a target voltage. The temperature obtaining unit obtains the temperature of a power storage unit. When the temperature obtained by the temperature obtaining unit is within a predetermined first temperature range, the control unit sets the target voltage to a first target voltage, and when the temperature obtained by the temperature obtaining unit is within a predetermined second temperature range that is higher than the first temperature range, the control unit sets the target voltage to a second target voltage that is higher than first target voltage.

Abstract: A power delivery system for data center. Servers are divided into server clusters, and each server cluster is served by multiple power source with multiple inputs from a power supply module. Each power supply module includes a local bus and a local controller which controls connections on the local bus to deliver utility power to its assigned server cluster or backup power to any of the server clusters. Each of the power supply modules has a battery storage system with switchable connections to the local bus and to an inter-system bus, and a PV system with switchable connections to the local bus and to an inter-system bus. The battery storage system may be charged from the utility power or the PV system. The inter-system bus is connected to all of the server clusters, such that power flowing in the inter-system bus can be delivered and dispatched to power any server cluster.

Abstract: A shield member electromagnetically shielding at least part of an electric circuit has a first end and a second end. The first end is configured to be constantly connected to a ground wire to electromagnetically shield at least part of the electric circuit; and the second end is configured to be selectively connectable to a power source, the shield member being configured to generate heat when energized while the second end is connected to the power source. Accordingly, the shield member electromagnetically shielding at least the part of the electric circuit can serve as a heater for preventing freezing and snow attachment.

Abstract: An electric power control system capable and a control device and a controlled device of electric power simplifying and reducing the cost of a slave device and electric power are provided. A power control system includes a master device supplied with power from a battery and a slave device powered by the battery through the master device. The slave device can also be supplied from a sub-battery or a solar cell that is different from the battery, the master device is provided with a control unit for controlling the slave device to be powered from the battery and the solar cell based on the power supply state of the battery and the solar cell.

Abstract: A power supply system including an uninterruptible power supply (UPS) comprising an input coupled to an AC source and configured to receive input AC power from the AC source and an output configured to provide AC output power to a load, the UPS including a converter coupled to the input, an inverter coupled to the output, and a DC bus coupled between the converter and the inverter, a renewable power source configured to provide DC power derived from a renewable energy source, a first DC/DC converter coupled between the renewable power source and the DC bus and configured to provide DC power derived from the renewable power source to the DC bus, and a controller in communication with the first DC/DC converter and configured to monitor an output power capability of the renewable power source, and to operate the first DC/DC converter to provide DC power derived from the renewable power source to the DC bus based on the output power capability of the renewable power source.

Abstract: A micro-electrical-mechanical system (MEMS) resonator device includes at least one functionalization material arranged over at least a central portion, but less than an entirety, of a top side electrode. For an active region exhibiting greatest sensitivity at a center point and reduced sensitivity along its periphery, omitting functionalization material over at least one peripheral portion of a resonator active region prevents analyte binding in regions of lowest sensitivity. The at least one functionalization material extends a maximum length in a range of from about 20% to about 95% of an active area length and extends a maximum width in a range of from about 50% to 100% of an active area width. Methods for fabricating MEMS resonator devices are also provided.

Abstract: A system and method for adjusting an electric vehicle charging speed that include determining that an electric vehicle arrives at a charging station and receiving electric vehicle pricing data associated with a price to charge the electric vehicle at a plurality of charging speed tiers by the charging station. The system and method also include determining a price difference between the price to charge the electric vehicle at a fast charging speed tier and a slower charging speed tier. The system and method further include adjusting the electric vehicle charging speed to the fast charging speed tier upon determining that the price difference is equal to or below a charging price delta threshold.

Abstract: An emission protection device including a signal generating unit to generate, for at least one electrical signal relayed by at least one conductor to a load, with which the load is switchable and/or energize-able, at least one electrical output signal, which is phase-shifted by 180° compared to the at least one electrical signal, and an emitting structure, which is connected to the signal generating unit so that the emitting structure is excitable with the at least one electrical output signal to emit an electromagnetic field. Also described is a bridge driver for a load, a controller for a load, and a load, as well as a method for operating a load by switching and/or energizing the load with the at least one electrical signal, generating the at least one electrical output signal, and exciting the emitting structure using the at least one electrical output signal to emit an electromagnetic field.

Abstract: A power converter system including an input configured to receive input AC power from an input power source, the input power source having a peak voltage limit, at least one output configured to provide output power to at least one load, a charger coupled to the input and configured to convert the input AC power into first DC power, a DC bus configured to receive the first DC power, at least one power converter configured to convert DC power from the DC bus into the output power, and an auxiliary power source coupled to the DC bus and configured to provide second DC power to the DC bus to supplement the first DC power provided by the charger in response to a voltage demand of the at least one load exceeding the peak voltage limit of the input power source.

Abstract: An electronic circuit and a method of making the same includes a multiplier circuit configured to perform a multiplication of a first input signal with a second input signal. The first input signal is a binary input signal that includes a sequence of input bits. The electronic circuit further includes an oscillator circuit configured to receive a result signal of the multiplication from the multiplier and to provide output pulses having an output frequency which is dependent on the result signal of the multiplication and a digital counter circuit configured to count the output pulses. The digital counter circuit is configured to provide a plurality of counter bits and to select one of the plurality of counter bits for incrementation in dependence on a significance of the corresponding input bit of the sequence of input bits.

Abstract: Provided is a method of feeding electric power at a grid connection point into an electric power grid having a grid voltage using a converter-controlled feeder, in particular using a wind energy system and/or of a storage unit. The method includes feeding the electric power into the electric power grid in a normal operating mode when no grid fault or grid malfunction has been detected in the electric power grid, and switching to a fault mode when a grid fault or grid malfunction has been detected, in which the grid voltage is increased or decreased. In the normal operating mode an active current is fed in in order to feed active electric power into the grid and if the need arises a reactive electric power is additionally fed into the grid by a reactive current. The combination of the active and reactive currents results in an apparent current.

Abstract: A phase-locked loop (PLL) may include a phase-frequency detector (PFD), a phase interpolation (PI)-based sampler, a loop filter, a voltage-controlled oscillator (VCO), and a fractional frequency divider. The PFD output corresponds to a phase error between a reference clock signal and a feedback signal. The PI-based sampler produces a slope signal in response to the PFD output, and adjusts the slope signal in response to a quantization error correction indication. The PI-based sampler also samples the slope signal. The loop filter produces a VCO control signal in response to a sampled slope signal. The VCO control signal controls the VCO frequency. The fractional frequency divider circuit divides the frequency of the VCO output signal and also determines the quantization error correction corresponding to the quantization error introduced by fractional division of the frequency of the VCO output signal.

Abstract: A method for manufacturing a micromechanical layer structure, including: providing a first protective layer patterned to have at least one opening which is filled with sacrificial layer material; depositing a functional-layer layer structure; producing a first opening in the functional-layer layer structure to at least one opening of the first protective layer, so that in at least one of the layers of the functional-layer layer structure; depositing a second protective layer so that the first opening is filled with material of the second protective layer; patterning the second protective layer and the filled first opening to have a second opening to the first protective layer, the second opening having the same or a lesser width than the first opening; removing sacrificial layer material at least in the opening of the first protective layer; and removing protective layer material at least in the second opening.

Abstract: This disclosure relates to a hierarchical power control system linked to a cloud server comprising a first microgrid cell including a first ESS equipped with a UPS structure and a first load with a power state managed by the first ESS; a second microgrid cell including a second load and a second ESS that manages a power state of the second load; a third microgrid cell including a third load; an emergency cell including an additional ESS equipped with a UPS structure and an additional emergency generator, and selectively connected to the second microgrid cell; a middleware server which communicates with the first to third microgrid cells and the emergency cell; and an integrated control system for receiving power supply state information of the first to third microgrid cells, and establishing an integrated operation schedule based on the received power supply state information of the first to third microgrid cells.

Abstract: A method for operating a renewable energy power plant comprising a plurality of renewable energy generators, a plurality of power dissipation systems and a battery storage system is provided. The method comprises steps of: monitoring the statuses of the power dissipation systems; performing a ramped active power recovery operation following a voltage deviation, and controlling the battery storage system during the ramped active power recovery operation to absorb power generated by the renewable energy generators in dependence on the monitored statuses of the power dissipation systems.