Abstract: Method and apparatus are disclosed for controlling a vehicle power supply using serial communication. An example vehicle power system includes a host controller configured to supply a slave controller with a first voltage. The vehicle power system also includes the slave controller. The slave controller is configured to determine a received voltage, determine a difference between the received voltage and a nominal operating voltage, and transmit the difference to the host controller. The host controller is then configured to modify the first voltage based on the difference.

Abstract: An electronic device receives external power from an external device when connected to the external device via a cable. The electronic device detects the power supply capability of the external device, determines whether the cable is a predetermined type of cable, and sets a current value limit for the external power based on the detected power supply capability of the external device and on the result of determining whether the cable is the predetermined type of cable.

Abstract: This disclosure provides systems, methods and apparatus for a flexible radio frequency (RF) converter. In one aspect, a subsystem of a spacecraft can include a flexible RF converter having a printed circuit board (PCB), and a synthesizer and controller disposed on the PCB. The PCB can be placed within a chassis. The controller can communicate with the synthesizer to adjust a frequency of a synthesizer signal generated by the synthesizer, which is used to adjust a frequency of an input RF signal.

Abstract: A power supply system includes a first energy storage, a second energy storage, a power transmission circuit, and circuitry. The first energy storage outputs first output power to an electric load. The second energy storage outputs second output power to the electric load. The circuitry is configured to acquire a demand power to be supplied to the electric load. The circuitry is configured to acquire a remaining capacity value indicating remaining capacity in the second energy storage. The circuitry is configured to control the power transmission circuit to change a ratio of the first output power to the second output power to supply the demand power in accordance with the demand power and the remaining capacity value.

Abstract: Novel and advantageous insulator discs with embedded resonator coils are provided. By linking the insulator discs in a series using an appropriate mechanical mechanism, the insulator discs form an insulator or insulator string for a high power transmission line system. The resonator coils embedded inside the insulator discs therefore form a series of relay resonators that can be used for wireless power transfer through the principle of near-field magnetic coupling and resonance. The insulator string can provide the simultaneous functions of voltage insulation and wireless power transfer over the length of the string. Applications include, but not limited to, wireless power transfer in a high-voltage environment such as that encountered in high-voltage power transmission line systems.

Abstract: A power-outputting management method includes following steps. When a plurality of power-supplying apparatuses are in a working interval, if an output power ratio of the power-supplying apparatus in a working status is less than an output power ratio standard, at least one of the power-supplying apparatuses in the working status is turned off, so that the output power ratio of the power-supplying apparatus in the working status increases and meets the output power ratio standard. When the power-supplying apparatuses are in the working interval, if the output power ratio of the power-supplying apparatus in the working status meets the output power ratio standard, a power capping of the power-supplying apparatuses is set based on an actual power consumption of an electronic apparatus.

Abstract: The present disclosure relates to a wireless power transmitter for performing communication with a wireless power receiver using a plurality of slots, and the wireless power transmitter may include a power conversion unit configured to transmit a wireless power signal to the wireless power receiver, and a power transmission control unit configured to perform communication with the wireless power receiver using the wireless power signal, wherein the power transmission control unit performs steps including receiving control information from the wireless power receiver within any one of the plurality of slots, transmitting an ACK signal to the wireless power receiver in response to the control information, and allocating the any one slot to the wireless power receiver to perform communication with the wireless power receiver using the any one slot when the ACK signal is received.

Abstract: A power supply system includes a first energy storage, a second energy storage, a power transmission circuit, and circuitry. The first energy storage outputs first output power to an electric load. The second energy storage outputs second output power to the electric load. The circuitry is configured to control the power transmission circuit to supply power from the first energy storage or from both of the first energy storage and the second energy storage to the electric load based on a demand power such that a first change in the first output power in accordance with a change in the demand power is lower than a second change in the second output power in accordance with the change in the demand power or a third change in an input power of the second energy storage in accordance with the change in the demand power.

Abstract: Wireless power transmission (WPT) systems are provided. According to an embodiment, the WPT system uses one or more power transmitting coils and a receiver for electromagnetically coupled wireless power transfer. The electrodynamic receiver can be in the form of an electrodynamic transducer where a magnet is allowed to oscillate near a receiving coil to induce a voltage in the receiving coil, a piezoelectric transducer where the magnet causes a vibrating structure with a piezoelectric layer to move, an electrostatic transducer where movement of the magnet causes a capacitor plate to move, or a combination thereof. An alternating magnetic field from the transmitting coil(s) excites the magnet in the receiver into mechanical resonance. The vibrating magnet then functions similar to an energy harvester to induce voltage/current on an internal coil, piezoelectric material, or variable capacitor.

Abstract: A signal transmission system includes: a switch component, a first choke component, a first conductive path and a second choke component that are connected in series between a power wire and a load; a third choke component and a resonant circuit that are connected in series between another power wire and a common node of the switch component and the first choke component; a second conductive path connected between the load and a common node of the third choke component and the resonant circuit; and a control block. Under control of the control block, a magnetic core of each choke component reaches magnetic saturation when the switch component does not conduct, and operates at magnetic saturation when the switch component conducts.

Abstract: The present disclosure discloses a UPS system configured in parallel configuration. The UPS system comprises a plurality of slave UPS units, a master UPS unit comprising a controller configured to identify number of operative slave UPS units from the plurality of slave UPS units when at least one slave UPS unit from the plurality of slave UPS units is inoperative and change operating voltage of the master UPS unit based on the identified number of operative slave UPS units. The UPS system further comprises at least one slave UPS unit from the plurality of slave UPS units comprising a controller configured to monitor the operating voltage of the master UPS unit to detect the change in the operating voltage, determine the number of operative slave UPS units, calculate a slave current for supplying to the load, and initiate the slave UPS unit to supply the slave current to the load.

Abstract: A UPS circuit, comprising a rectification phase leg (PL1) for rectification, which is used for converting a received alternating current into a direct current; inversion phase legs (PL21, PL22, PL23) for inversion, which are used for inverting the direct current output by the rectification phase leg into an alternating current; a failure detection device (D) which is used for detecting whether an inversion phase leg has failed; a redundant inversion phase leg (PL2a), with an input end thereof being connected to an output end of the rectification phase leg; and a control device which is used for receiving a signal sent by the failure detection device and is also used for enabling the redundant inversion phase leg to replace the inversion phase leg which has failed when a failure occurs.

Abstract: Various embodiments for managing assets in a data center device rack include: establishing a data connection between a cabinet level controller and at least one primary power distribution unit (PDU); using a first electrical outlet on the primary PDU to establish an electrical connection between the primary PDU an electrical asset in a data center equipment rack; using a first asset interface connector on the cabinet level controller to establish a data connection between the cabinet level controller and the electrical asset in the data center equipment rack, the first electrical outlet and the first asset interface connector being in horizontal alignment; using a router integrated into the cabinet level controller to connect the cabinet level controller to a wide area Internet Protocol (IP) network; and using the router to establish a single IP address corresponding to a plurality of electrical assets in the data center equipment rack.

Abstract: A driving relay comprises a first relay provided on one line of a positive electrode-side line and a negative electrode-side line of power lines; a second relay provided on the other line; and a first precharge circuit configured such that a resistance element and a third relay are connected in series to bypass the second relay. A charging relay comprises a fourth relay provided on the one line of the positive electrode-side line and the negative electrode-side line of the power lines; a fifth relay provided on the other line; and a second precharge circuit configured such that a sixth relay and the resistance element shared with the first precharge circuit are connected in series to bypass the fifth relay. The third relay, the fifth relay and the sixth relay are to be switched on when the first relay is switched on and the second relay has an off-failure.

Abstract: A switch module and a converter developed with the help of a switch module. The switch module presents two series connections comprising a power semi-conductor switch and a diode and. Parallel to the first series connection a first capacitor is connected. Between the first capacitor and the second series connection at least one intermediate connection is connected. This is designed as quadripole, whereby between both the output connections a second capacitor is connected. The first output connection is connected through a third power semi-conductor switch with the first input connection. The second output connection is connected with the cathode of a third diode, whose anode is connected with the second input connection of the intermediate circuit. With this switch module at least five voltage levels can be set up for an output voltage. For each additionally present intermediate circuit the number of the possible voltage levels increases by two.

Abstract: An inductive wireless power transfer and communication system includes an electrostatic shield for one of the coils. The electrostatic shield is inductively coupled with the coil and is configured as an open circuit. A signal processing element or elements, especially a modulator or a demodulator, are connected across the electrical discontinuity in the electrostatic shield. Because the electrostatic shield is inductively coupled to the coil, the modulator or demodulator can operate on the signal on the coil. A variable impedance element is connected across the electrical discontinuity in the electrostatic shield. Because the electrostatic shield is inductively coupled to the coil, the variable impedance element can tune the impedance of the system.

Abstract: A power supply system includes first and second energy storages, a power transmission circuit, and circuitry. The circuitry configured to control the power transmission circuit to supply power from at least one of the first energy storage and the second energy storage to an electric load when a first remaining capacity value is larger than a first threshold value. The circuitry configured to control the power transmission circuit to supply power from the first energy storage or both of the first energy storage and the second energy storage to the electric load when the first remaining capacity value is smaller than the first threshold value. The circuitry configured to control the power transmission circuit to stop supplying power from the first energy storage to the electric load when the first remaining capacity value is smaller than a second threshold value which is smaller than the first threshold value.

Abstract: A power transmission apparatus includes a power transmission unit that wirelessly transmits power to an electronic device, a foreign substance detection unit that detects a foreign substance affecting power transmission performed by the power transmission unit, a loop shaped power transmission antenna serving as an antenna for the power transmission unit transmitting power to the electronic device, and a foreign substance detection antenna for the foreign substance detection unit detecting the foreign substance, wherein the foreign substance detection antenna is arranged at a predetermined distance or more from the power transmission antenna in a vertical direction to a loop direction of the power transmission antenna.

Abstract: A drive circuit that operates stably and has a small circuit size. Provided is a switch apparatus including a power semiconductor element connected between a first terminal on a high potential side and a second terminal on a low potential side; a capacitor; a charging section that charges the capacitor for at least a portion of an interval during which the power semiconductor element is OFF; a discharging section that causes the capacitor to gradually discharge, in response to the power semiconductor element becoming ON; and a cutoff section that sets the power semiconductor element to an OFF state, in response to a voltage of the capacitor becoming lower than a threshold voltage.

Abstract: A vehicle powertrain includes an inverter coupled with an electric machine and a controller. The controller may be configured to dither a base frequency of a pulse width modulated (PWM) signal, by less than an amount that is based on a rotational speed of the machine and the base frequency, to operate the inverter such that energy at sidebands and harmonics of the base frequency are reduced by distributing the energy to reduce audible vibrations of the powertrain.