Abstract: A nonvolatile storage device includes a power management system with a power loss imminent (PLI) capacitor to provide backup energy in case system power is lost. The power management system includes a circuit with a charging path for the PLI capacitor that includes a series current-limiting circuit, and a diode coupled in parallel with the current-limiting circuit, the diode having a cathode coupled to the charging circuit and an anode to couple to the PLI capacitor.

Abstract: Disclosed is an apparatus including: a photovoltaic panel; a CPG controller configured to receive a limit output power value of a photovoltaic panel, a photovoltaic panel terminal voltage, and a photovoltaic panel output current and output a photovoltaic panel terminal voltage reference; a direct current (DC)-voltage controller configured to receive the photovoltaic panel terminal voltage reference and the photovoltaic panel terminal voltage and output a duty ratio to cause an error between these values to become zero; a pulse width modulation (PWM) control signal generator configured to receive the duty ratio and output a PWM signal to control a DC/DC converter connected to the photovoltaic panel; the DC/DC converter configured to receive the PWM signals and perform CPG control; and a DC/AC inverter connected to the DC/DC converter and configured to convert DC power into AC power and output the AC power to an electrical grid.

Abstract: A long-term predictor circuit predicts a long-term predicted power indicating temporal variations in consumed power of a customer, using a long-term prediction model indicating the variations for each moment of clock times. A short-term predictor circuit predicts a short-term predicted power using a short-term prediction model indicating the variations over a time interval before and after a change in a consumed power of each load apparatus, based on the variations over a time interval immediately before a current time, the short-term predicted power indicating the variations over a time interval immediately after the current time. A controller circuit controls charging and discharging of a battery apparatus by setting a charging power or a discharging power based on the long-term predicted power, and controls discharging of the battery apparatus by setting a discharging power based on the short-term predicted power.

Abstract: An improved system and method for managing and distributing electrical power is provided. In various embodiments, systems and methods comprise at least one powered device that receives electrical power from at least one source. Structure and devices are provided within the system to monitor, regulate, and transmit power from a source to a powered or driven device in an efficient and reliable manner based on availability, cost, and environmental factors.

Abstract: Example implementations relate to a variable soft start device. For example, in an implementation, the variable soft start device may set the capacitance of a variable capacitance circuit connected to a soft start pin of the electronic fuse. The variable soft start device may read a power-good signal from the electronic fuse and determine the capacitance to set according to the power-good signal.

Abstract: An electrical machinery and apparatus has a first rechargeable battery, and a second rechargeable battery different in characteristics from the first rechargeable battery built therein, the electrical machinery and apparatus including: a first charging circuit charging the first rechargeable battery; and a second charging circuit charging the second rechargeable battery. The second charging circuit charges the second rechargeable battery with an electric power supplied from an outside of the electrical machinery and apparatus, and the first charging circuit charges the first rechargeable battery with both the electric power supplied from the outside of the electrical machinery and apparatus, and an electric power supplied from the second rechargeable battery.

Abstract: An LED fault detection circuit is provided for detecting a fault in at least one LED. The circuit may include a test voltage generator for applying at least one test voltage level to the at least one LED, wherein the at least one test voltage level is less than a nominal operating voltage range; a current measuring circuit for measuring at least one current draw by the at least one LED at the at least one test voltage level; and a processing circuit coupled to the test voltage generator for causing the at least one test voltage level to be applied to the at least one LED, the processing circuit coupled to the current measuring circuit for detecting a fault in the at least one LED when the at least one measured current draw has a profile that does not correspond to an expected current draw profile.

Abstract: According to one aspect, embodiments of the invention provide a DC-DC power converter system comprising a positive bus interface, a negative bus interface, a positive battery interface, a negative battery interface, a first converter segment coupled to the positive bus interface and the negative bus interface, a transformer coupled to the first converter segment, a second converter segment coupled to the transformer, the positive battery interface, and the negative battery interface, a bus balancer circuit coupled to the transformer, and a controller configured to identify an imbalance between a positive voltage level on a positive DC bus and a negative voltage level on a negative DC bus, and in response to identifying the imbalance, operating the bus balancer circuit to convert the first converter segment, the transformer, and the second converter segment into an inverted buck-boost converter configured to transfer energy between the positive bus interface and the negative bus interface.

Abstract: A light emitting embodiment uniformly illuminating a planar field configured to operate in conjunction with other like embodiments in proximity to form a continuous uniformly lit planar pathway and/or field of illumination.

Abstract: A direct current (DC) to alternating current (AC) converter in accordance with an embodiment includes a battery array module, a battery control module and a polarity converter, wherein the battery array module and the magnetic converter are respectively coupled to the battery control module. The battery array module is used to receive DC signals. The battery array module is controlled by the battery control module to reconfigure and generate a multi-phase step signal. The multi-phase step signal is sent to the polarity converter. The multi-phase step signal is converted into an AC signal output by the polarity converter.

Abstract: Methods, systems, and apparatus, including for back-up power sources. In one aspect, a method includes providing a plurality of first battery devices, each first battery device respectively electrically coupled to a respective server rack in a plurality of server racks and having a respective capacity to provide power to the respective rack for a power anomaly for up to a first duration. Providing a second battery device electrically coupled to the plurality of server racks and having a capacity to provide power to the plurality of respective server racks for a power anomaly for up to a second duration, wherein the second duration is longer than the first duration. A power anomaly is a deviation of mains power from one or more of a nominal supply voltage and frequency.

Abstract: A circuit for actively performing short-circuit and a motor controller are provided. The circuit includes an undervoltage detecting circuit, an emergency power supply, a reverse-flow preventing circuit, and a gate level selecting switch. The undervoltage detecting circuit is configured to detect a driving power supply signal outputted from the driving power supply and output, in a case that an amplitude of the driving power supply signal is lower than a first threshold, an emergency active short-circuit enable signal. In response to the emergency active short-circuit enable signal, the emergency power supply is enabled and the gate level selecting switch is controlled to switch from a first conduction path to a second conduction path, to transmit an emergency power supply signal outputted from the emergency power supply to a bridge arm via the second conduction path.

Abstract: In electrically stimulating neural tissue it is important to prevent over stimulation and unbalanced stimulation, which would cause damage to the neural tissue, the electrode, or both. It is critical that neural tissue is not subjected to any direct current or alternating current above a safe threshold. Further, it is important to identify defective electrodes, as continued use may result in neural damage and further electrode damage. The present invention presents system and stimulator control mechanisms to prevent damage to neural tissue.

Abstract: A system and method are presented relating to a hybrid portable charging device having an internal battery and an internal supercapacitor. Input logic is implemented as part of the management system for the charging device. In one embodiment, input power is analyzed to determine whether the input power level is low, medium, or high, with input power being diverted to the battery or supercapacitor depending on the determined input power level. At high input power, the supercapacitor is charged first. At low input power, the battery is charged first. At medium power, the input power is split between the supercapacitor and the battery. In another embodiment, output can be directed using output logic so that power flows first from the supercapacitor so that the supercapacitor is fully discharged before battery power is output to the load on the charging device.

Abstract: To provide an aroma diffusing device and a method of controlling an aroma diffusing device that can enable a plurality of functions to be achieved by operation inputs to one operation input part. Provided is an aroma diffusing device including: a perfume holding part in which a perfume is held; an air blowing source configured to supply air to the perfume holding part; an aroma discharge part through which the air having passed through the perfume holding part is discharged; an operation input part on which an operation input for the air blowing source is performed by a user; and an air blowing source control part configured to control a supply state of the air on the basis of an operation input on the one operation input part.

Abstract: A layered DC busbar structure includes a positive DC substrate arranged to carry a positive DC voltage, the positive DC substrate being arranged on a first layer, and a negative DC substrate arranged to carry a negative DC voltage, the negative DC substrate being arranged on a second layer. A DC neutral substrate is arranged on a central layer between the first and second layers. An AC substrate is arranged to carry an AC voltage, the AC substrate being arranged on the central layer and substantially coplanar with the DC neutral substrate.

Abstract: A retrofit tubular lighting device (7), comprising first (p1, p2) and second connection pins (p3, p4), a first (12) and second filament emulation circuit (13) coupled to the first (p1, p2) and second connection pins (p3, p4) respectively, a lighting element (4), a driver (3) coupled to the first (12) and second filament emulation circuit (13), a battery (5) and the lighting element (4). The driver (3) provides a charge to the lighting element (4) and the battery (5). The battery (5) stores the charge provided by the driver (3) and provides charge to the lighting element (4). A communication device sends a first charging signal to another lighting device comprising a further battery and coupled to the electronic ballast, when the charge of the battery (5) is below a first threshold. The communication device receives a second charging signal from the other lighting device, wherein the second charging signal indicates that a further charge of the further battery is below a second threshold.

Abstract: A light-emitting diode (LED) luminaire control system comprising a rechargeable battery and a control and test circuit is adopted to provide an emergency power to operate a luminaire that works only in alternate-current (AC) mains. The luminaire comprises LED arrays and a power supply. The LED luminaire control system further comprises a current-fed converter circuit, a control and test unit, a relay switch, a local controller, a remote controller, and a receiver circuit. When a battery discharging test is initiated by the remote controller with a band-pass signal transmitted, the receiver circuit can detect such a signal and subsequently send a decoded command to the LED luminaire control system to execute such a test by operating the luminaire without uncertainty.

Abstract: Power systems, devices, and methods include a plurality of network interfaces for providing communication to, e.g., a management server, console, or user interface. One or more controllers coupled to power circuitry determine whether a preferred one of the network interfaces has connectivity, and directs communication over the preferred network interface in response to a determination that the preferred network interface does have connectivity. The controller directs communication over an alternate one of the network interfaces in response to a determination that the preferred network interface does not have connectivity.

Abstract: An on-board charging/discharging system includes a bidirectional converter and a low-voltage converter. When the high-voltage battery is charged or discharged by the bidirectional converter, the bidirectional converter is operated in a variable-frequency mode and the low-voltage converter is also operated in the variable-frequency mode. The on/off states of different switches are controlled according to the output gain of the bidirectional converter, and thus the on-board charging/discharging system has optimized volume and reduced cost. Moreover, the soft switching is achieved when the output gain is lower than 1, greater than 1 or equal to 1. Consequently, the efficiency of the on-board charging/discharging system is enhanced. Moreover, while the low-voltage converter is operated in a fixed-frequency mode, the first bridge of the bidirectional converter is correspondingly controlled. Consequently, the voltage of the bus capacitor is within a reasonable range.

Abstract: Provided is an anti-islanding protection system. The system is applied to a low-voltage distributed generation resource (DGR) and includes a box, a reverse power protector, a protection module and an output controller. The reverse power protector has an end connected to a first current transformer and has another end connected to the output controller. The reverse power protector is configured to provide reverse power protection for the low-voltage DGR. The output controller has an end connected to the protection module and the reverse power protector and has another end connected to a grid-connection switch of the low-voltage DGR. The output controller is configured to control the grid-connection switch to turn off when reserve power is detected. The protection module has an end connected to a second current transformer and has another end connected to the output controller.

Abstract: The present application provides a power supply cabinet, comprising a first power supply region and a second power supply region including at least one slot for receiving a first power supply module and a second power supply module respectively, a mode switching unit for outputting a mode signal to the first power supply module and the second power supply module, and a position setting unit for outputting a position signal to the first power supply module and the second power supply module. Input sides of the first power supply module and the second power supply mode are electrically connected to a first power supply and a second power supply. The power supply cabinet selectively operates in a first power supply mode (e.g. N+N mode) or a second power supply mode (e.g. N+1 mode) depending on the mode signal or types of the power supplies.

Abstract: An energy harvesting device (CTH) installed in an electrical distribution system (EDS) for powering ancillary electrical devices (AD) used in the distribution system. The device includes a first voltage regulator circuit (CC) configured to produce a voltage matched to a power curve of a current transformer (CT) to which the device is electrically coupled. The device also includes a second and separate voltage regulator circuit (SVR) which continuously operates to maximize the amount of electrical energy recovered from the current transformer.

Abstract: A photovoltaic (PV) system includes module-level power electronic (MLPE) devices that produce energy. The PV system includes a gateway to receive and send data to MLPE devices. The gateway also connects the PV system with a network, such as a local area network, that allows access to the Internet. The gateway provides functionality within the PV system to perform various processes to improve operation of MLPE devices.

Abstract: A control system and photovoltaic system and micro-grid using the same and method thereof.

Abstract: An integrated power supply system for auxiliary services for power converters comprises a sinusoidal filter connected between an auxiliary output of a DC-AC inverter module and an input of the auxiliary service transformer in such a way that a control module, by means of control commands, interrupts the main output of the DC-AC inverter module and enables the secondary output thereof to allow the auxiliary service transformer to generate the auxiliary AC power. The DC-AC inverter module is connectable to a DC source and supplies the power it generates to an AC network.

Abstract: The present invention provides a radio field intensity measurement device having a display portion with improved visibility, in the case of measuring a weak radiowave from a long distance. In the radio field intensity measurement device, a battery is provided as a power source for power supply and the battery is charged by a received radiowave. When a potential of a signal obtained from the received radiowave is higher than an output potential of the battery, the power is stored in the battery. On the other hand, when the potential of the signal obtained from the received radiowave is lower than the output potential of the battery, power produced by the battery is used as power to drive the radio field intensity measurement device. As an element to display the radio field intensity, a thermochromic element or an electrochromic element is used.

Abstract: Uninterruptible power supply system and method for reconditioning an exhausted battery module, wherein a terminal voltage of the battery module is determined and compared with a predefinable threshold value after starting a network-side supply, where after a waiting time has elapsed, when the threshold value is fallen below, an inverse polarity protection unit is activated for a time pulse, such that when communication between the base unit and the battery module occurs, the inverse polarity protection unit is permanently switched on and a voltage drop is determined and compared within the battery module with a predefined minimum voltage, and if at least one determined voltage drop falls below the predefined minimum voltage, then a predefined charging voltage is applied to the battery module until either a predefinable period of time is exceeded or a predefinable current value is surpassed by a charging current determined in the base unit.

Abstract: According to one aspect, a DC power supply is provided. The power supply includes a first input configured to be coupled to an AC power source, a second input configured to be coupled to a battery, an output, a transformer, and a controller coupled to the transformer. The transformer includes a first winding configured to be coupled to the first input, a second winding configured to be coupled to the second input, and a third winding configured to be coupled to the output. The controller controls, in a first mode, the first winding to generate, based on power received from the AC power source, a first voltage across the second winding to charge the battery, and a second voltage across the third winding, and control, in a second mode, the second winding to generate, based on power received from the battery, a third voltage across the third winding.

Abstract: A method of controlling power supply of a caravan including a photovoltaic plate includes: receiving a first power parameter of an input interface element; determining whether there is a mains supply to be input into the input interface element according to the first power parameter; turning on a first switch to make the input interface element be electrically connected to the output interface element if the mains supply is input into the input interface element; receiving a power parameter of a battery pack if the mains supply is not input into the input interface element; determining whether a remaining power of the battery pack exceeds a power threshold according to the power parameter of the battery pack; and making the battery pack be electrically connected to an output interface element if the remaining power of the battery pack exceeds the power threshold.

Abstract: A battery pack includes a plurality of secondary batteries having different discharge characteristics; at least one switch configured to switch a secondary battery connected to a load among the secondary batteries; and a controller configured to control the switch.

Abstract: An apparatus includes an AC-to-DC power supply, with a positive terminal operatively coupled to two two-wire pairs of an Ethernet port to provide a first and second power path over a structured cable. A negative terminal is operatively coupled to a third two-wire pair of the Ethernet port to complete the first power path. Power path control logic has an input port operative to receive a two-wire input signal from an external device, and is operatively coupled to the negative terminal of the AC-to-DC power supply output, and to a fourth two-wire pair of the Ethernet port to complete the second power path. The power path control logic is operative to disconnect the negative terminal of the AC-to-DC power supply from the fourth two-wire pair of the Ethernet port in response to a two-wire input signal received at the input port, to disconnect the second power path.

Abstract: According to at least one aspect of the present disclosure, a method of operating a, Uninterruptible Power Supply (UPS) is provided. The method includes receiving, in a first mode of operation, AC power at an input of the UPS, providing, in the first mode, the AC power to a charger and a clamp-charger circuit, charging, by the charger in the first mode, a UPS battery of the UPS with a first charging current derived from at least a portion of the AC power, charging, by the clamp-charger circuit in the first mode, the UPS battery with a second charging current derived from at least a portion of the AC power, providing, in a second mode of operation, output power at an output of the UPS derived from the UPS battery, and charging, by the clamp-charger circuit in the second mode, the UPS battery using a third charging current.

Abstract: A protection circuit for an electronic device including a first power output interface and a second power output interface is disclosed. The protection circuit includes a first switch element and a detection circuit. The first switch element is coupled between a first voltage source and the first power output interface. In an operation of the protection circuit, the detection circuit detects an output voltage value of the second power output interface to generate a detection result, and the first switch element, according to the detection result, connects the first voltage source to the first power output interface to allow the first power output interface to output power to an external terminal, or disconnects the first voltage source from the first power output interface.

Abstract: A battery switch testing system that includes a memory configured to may include one or more executable instructions and a controller configured to execute the executable instructions, where the executable instructions enable the controller to: (a) monitor current discharge from a first battery; after (a), (b) when the current discharge from the first battery falls below a threshold value, open an internally integrated first battery switch of the first battery; after (b), (c) close the first battery switch; after (c), (d) monitor current discharge from a second battery; after (d), (e) when the current discharge from the second battery falls below a threshold value, open an internally integrated second battery switch of the second battery; and after (e), (f) close the second battery switch.

Abstract: A power bank has a station and a plurality of battery modules. When the battery modules are stacked on the station, rechargeable batteries of the battery modules are electrically connected in parallel. When a charging port of the station is electrically connected to an external power supply, a charging-discharging control circuit of the station receives electric energy from the external power supply via the charging port and uses the received electric energy to charge the rechargeable batteries. When a discharging port of the station is electrically connected to an external electronic device, the charging-discharging control circuit transfers electric energy received from the rechargeable batteries to the external electronic device. Each of the battery modules is replaceable, and the total number of the battery modules of the power bank is adjustable.

Abstract: An improved power supply circuit which includes a utility power source, a plurality of silicon controlled rectifiers (SCR1-SCR6), a first battery, a second battery, a first inductor, a second inductor, a first capacitor, a second capacitor and a plurality of power switch elements (Q1˜Q4). When the utility power source is in a positive half cycle, the SCR1 and the SCR6 are turned on; the SCR2, the SCR3, the SCR4 and the SCR5 are turned off; the Q1 is activated to make the electrical energy directed to the first capacitor through the diode of the Q3, and the voltage on the first capacitor is maintained at a constant. Meanwhile, the Q2 is turned off, the Q4 is operated to let the current flow through the second inductor to charge the second battery.

Abstract: A variable magnetic field in which a power-supplying coil and a power supplying resonator exist is generated only by the power-supplying coil. Power-supplying coils and each of which generates a variable magnetic field due to the supply of a variable current via a first current path on one coil end a side and a second current path on the other coil end side; resonance capacitors which are provided on the first current path and the second current path; and a power-supplying coil short-circuit mechanism which is able to cause at least one of the power-supplying coils and to function as a power supplying resonator by allowing the end portions and of the first current path and the second current path to short-circuit with each other are provided.

Abstract: A method for managing backup power in the event of a power supply deficit or disruption includes detecting the power supply deficit and recruiting some or all of the backup battery units associated with electronic devices in the system to provide a backup power supply. Depending on the severity of the power supply failure, the selected backup battery units can be reconfigured from providing power to local electronic devices to providing power along a backup power supply pathway to other electronic components in the system.

Abstract: In accordance with embodiments of the present disclosure, an information handling system may include a processor, a power supply unit for supplying electrical energy to information handling resources of the information handling system, a battery backup unit for supplying electrical energy to the information handling resources responsive to a power event associated with the power supply unit, and a non-transitory computer-readable readable medium having embodied thereon a program of instructions configured to, when executed, in response to the power event, gracefully terminate one or more applications executing on the processor in accordance with a desired priority ranking.

Abstract: An information handling system includes a power supply unit (PSU) and a power assist unit (PAU). The PSU provides a power rail to power a load, and a constant current indication that indicates whether the power supply unit is operating in a constant current mode. The PAU is coupled to the power rail, and includes a power storage element, a converter coupled to the power storage element and to the power rail, and a controller. The controller receives an enable signal when the constant current indication indicates that the first power supply unit is operating in the constant current mode, and in response, the controller directs the converter to convert a voltage from the power storage element and to a current to the power rail to meet an additional demand of the load for power. When the controller does not receive the enable signal, the controller directs the converter to charge the power storage element from the power rail.

Abstract: An information handling system includes a power supply unit (PSU) and a power assist unit (PAU). The PSU provides a power rail to power a load, and a constant current indication that indicates whether the power supply unit is operating in a constant current mode. The PAU is coupled to the power rail, and includes a power storage element, a converter coupled to the power storage element and to the power rail, and a controller. The controller receives an enable signal when the constant current indication indicates that the first power supply unit is operating in the constant current mode, and in response, the controller directs the converter to convert a voltage from the power storage element and to a current to the power rail to meet an additional demand of the load for power.

Abstract: A UPS comprising an input, an output, a battery circuit, a PFC stage, a switch configured to selectively couple an interface of the PFC stage to the input in an online mode and to the battery circuit in a backup mode, a positive DC bus, a negative DC bus, and a controller configured to operate, in the online mode, the PFC stage to provide DC power, derived from the input AC power, to the DC busses, to operate, in the backup mode, the PFC stage to provide DC power, derived from the backup DC power, to the DC busses, to operate, in a first stage of the backup mode, the battery circuit to couple a positive terminal of a DC source to the interface, and to operate, in a second stage of the backup mode, the battery circuit to couple a negative terminal of the DC source to the interface.

Abstract: A coupler for connecting a portable inverter supply to a load center includes a neutral-to-ground bonding switch that is actuated from a closed state to an open state when a load side center neutral connector and a load side center ground connector of the coupler are respectively connected to a load center side neutral conductor and a load center side ground conductor. In the closed state, the neutral-to-ground bonding switch connects the second conductor to the third conductor. In the open state, the neutral-to-ground bonding switch disconnects the second conductor from the third conductor.

Abstract: Embodiments of the present disclosure provide a method, an apparatus, an additional power supply, and a mainboard system for supplying power to a processor. The method comprises determining whether an additional power supply is able to provide extra power required by a processor in response to receiving a first signal from a power supply unit that supplies power to the processor. The first signal indicates that the power required by the processor exceeds maximum power that can be provided by the power supply unit. The method further comprises supplying power to the processor by at least the additional power supply in response to determining that the additional power supply is able to provide extra power. The embodiments of the present disclosure can supply the required extra power to the processor from the additional power supply so as to optimize the performance of the processor in an acceleration mode.

Abstract: A wireless sensor node is described. The wireless sensor node may include a wake-up circuitry configured to awaken the sensor when a request is received. The sensor may be placed in a sleep mode, thus saving battery usage until a wake-up signal requesting use of the sensor is received. Powering of the wake-up circuitry may be supplied through energy captured using an energy harvester. In one example, the energy for powering the wake-up circuitry is extracted from the same signal used for awakening the sensor. The wireless sensor mode may operate in a passive mode, in which the energy for powering the wake-up circuitry is harvested, or in a power supply-assisted mode, in which some of the power is provided by a power supply. High quality factors filters may be used to increase the signal-to-noise ratio of the wake-up signals, thus improving the node's ability to recognize activation requests.

Abstract: This application discloses a system that may comprise at least a portion of a supply network. The system may further comprise a load controller that controls current flow with a current level of I1 into a load network that provides power to one or more loads from the at least a portion of the supply network according to a preprogrammed load curve. The system may also comprise a protection system that isolates the at least a portion of the supply network from the load controller in response to detecting a current pattern that is inconsistent with the preprogrammed load curve.

Abstract: In one example, a system for bypass switch control includes a controller coupled to a number of backup power modules and to a number of bypass switches that correspond to each of the number of backup power modules, wherein the controller activates a bypass switch when a corresponding backup power module is deactivated.

Abstract: There is provided a medical stereoscopic observation device, including: an acquisition section that acquires a first signal associated with a first imaging section and a second signal associated with a second imaging section via mutually different transmission channels; and a switching section that switches a signal to use for a certain control between the first signal and the second signal, in accordance with a state of the transmission channel for transmitting the first signal.

Abstract: According to some aspects, a low-field magnetic resonance imaging system is provided. The low-field magnetic resonance imaging system comprises a magnetics system having a plurality of magnetics components configured to produce magnetic fields for performing magnetic resonance imaging, the magnetics system comprising, a B0 magnet, a plurality of gradient coils, and at least one radio frequency coil, a power system comprising one or more power components configured to provide power to the magnetics system to operate the magnetic resonance imaging system to perform image acquisition, and a power connection configured to connect to a single-phase outlet to receive mains electricity and deliver the mains electricity to the power system to provide power needed to operate the magnetic resonance imaging system.