A thermostat system for control of an HVAC (Heating, Ventilation and Air-Conditioning) system, the thermostat system comprising a power conversion module, the power conversion module further comprising a power input of either a direct-current voltage or an alternating-current voltage, a battery management system including a battery and a battery management circuit, the battery management circuit configured to select either the battery output voltage or the primary output voltage based on an operating condition, a communication module, a temperature monitor, one or more environmental sensors, a graphical user interface display, and a processor.

A power device is provided. The power device includes a current limiting resistor in series with a load, the current limiting resistor configured to provide a first current path to the load. The power device also includes an inrush current control device configured to provide a second current path to the load, the second current path configured to bypass the first current path in response to the inrush current control device being activated. The power device also includes a bypass device configured to provide a third current path to the load, the third current path configured to provide a low-resistance current path to the load during a power surge.

A system for providing power from an AC power supply to an external load. The system includes a current limiter circuit, connected to an input of a switched-mode power supply. The system includes the switched-mode power supply that provides a first voltage signal and a second voltage signal. The system includes a supervisor circuit that is connected to the first output of the switched-mode power supply and coupled to a relay control circuit. The supervisor circuit monitors the first voltage signal and enables the relay control circuit. The relay control circuit provides a first voltage corresponding to the first voltage signal to a first voltage rail and provides a second voltage corresponding to the second voltage signal to a second voltage rail. A relay powered by a connection to the first voltage rail or the second voltage rail connects the AC power supply to an external load.

The invention provides a power supply module and a charged particle beam device that are capable of reducing ripple noise. A high-voltage generation circuit 101 includes booster circuits CPa and CPb of two systems that are configured to be symmetrical to each other, and performs a boosting operation by using a capacitive element and a diode in the booster circuits CPa and CPb of the two systems. The high-voltage generation circuit is housed in a housing and a reference power supply voltage is applied thereto. A left electrode 102a is fixedly provided in the vicinity of one of the booster circuits CPa and CPb of the two systems in the housing, and a right electrode 102b is fixedly provided in the vicinity of the other of the booster circuits CPa and CPb of the two systems in the housing. A stray capacitance adjustment circuit 100a adjusts capacitance values of stray capacitances of the booster circuits CPa and CPb of the two systems by electrically controlling an electrical connection characteristic between the left electrode 102a and the reference power supply voltage 104 and an electrical connection characteristic between the right electrode 102b and the reference power supply voltage 104

A switching power supply device according to an embodiment of the present disclosure includes: power supply circuits corresponding to phases of a polyphase AC power supply as an external power supply; a switching circuit configured to switch a connection destination of another power supply circuit other than a specific power supply circuit corresponding to a specific phase of the external power supply among the power supply circuits to a phase corresponding to the other power supply circuit or the specific phase; and a control unit configured to connect, to each phase of the external power supply connected to the switching power supply device, the other power supply circuit corresponding to the phase, and connect the other power supply circuit as a surplus to the specific phase when the number of phases of the external power supply is smaller than the number of the power supply circuits.

A circuit to rectify an alternating current (AC) signal produced by an output coil of a transformer responsive to an input current in an input coil of the transformer comprises: an output node and a return node coupled to an output load; a first rectifier, coupled to a first terminal of the output coil and the return node, to rectify the AC signal to supply a current to the output node when the input current is ON; a second rectifier, coupled to a second terminal of the output coil and the return node, to rectify the AC signal to supply a current to the output node when the input current is OFF; and a voltage clamp to clamp a first voltage transient and a second voltage transient of the AC signal that occur at the first terminal and the second terminal when the input current is switched OFF and ON.

A power supply circuit for an x-ray production system, which has an inverter circuit with an output for connecting the inverter circuit with an x-ray source of the x-ray production system, includes a rectifier circuit including an input to connect the rectifier circuit with a power supply network, the rectifier circuit further including an output to connect to an input of the inverter circuit; and a backup circuit including a plurality of electrical energy storage cells, the plurality of electrical energy storage cells being connectable in series between the input of the inverter circuit and the output of the rectifier circuit.

A rectifier is configured to convert a three-phase AC voltage to a 12-pulse DC voltage, drawing a 12-pulse AC current from a three-phase network. The rectifier may comprise a first interleaved phase-leg, a second interleaved phase-leg, and/or a third interleaved phase-leg. Respective interleaved phase-legs may comprise positive portions configured to conduct positive current from a transformer towards a load, and negative portions configured to conduct negative current from the load back to the transformer. The rectifier may be configured to sequentially cycle respective interleaved phase-legs into positive and/or negative 120 conducting states over a 360 degree cycle to output the 12-pulse DC voltage. For example, during a first 120 degree conducting state a positive portion of the first interleaved phase-leg may conduct positive current towards the load, while a negative portion of a different phase-leg may conduct negative current back to the transformer.

Disclosed are an electromagnetic induction type magnetic energy collector based on capacitive energy storage and a power improvement method. A main energy acquisition coil is sleeved in a main circuit to collect magnetic field energy, and a detection coil is sleeved in the main circuit to generate a sinusoidal signal for detecting zero crossing of a primary current; a switch group S2 and a switch group S1 are alternately turned on and off, a first rectifier bridge is connected to the switch group S2 and the switch group S1, and a comparator circuit is connected to the detection coil to compare the sinusoidal signal and convert the sinusoidal signal into a zero-crossing square wave signal; and a control module is connected to the comparator circuit, determines the zero crossing of the primary current based on the zero-crossing square wave signal.

A power conversion device is provided. The power conversion device includes a bulk capacitor, a current limiting resistor in series with the bulk capacitor, and an inrush current control device configured to bypass the current limiting resistor when activated. The power conversion device also includes a bypass device in parallel with the current limiting resistor, configured to provide a low-resistance path to the bulk capacitor during a power surge.