174 results about "DC-to-DC converter" patented technology

A system includes: an alternating current (AC) to direct current (DC) converter (AC-DC converter), the AC-DC converter connectable to a line voltage; and a DC to DC converter (DC-DC converter) connected to the AC-DC converter, the DC-DC converter including: a high voltage buck-boost converter having a secondary side connectable to a high voltage battery; a low voltage buck-boost converter having a secondary side connectable to a low voltage battery; and one or more transformers having a primary side connected to the AC-DC converter, a secondary side connected to a primary side of the high voltage buck-boost converter, and a tertiary side connected to a primary side of the low voltage buck-boost converter.

An electronic controller is configured to adjust the duty cycle, between a respective pairs of semiconductor switches of the primary converter of a direct-current-to-direct-current converter based on reducing or minimizing one or more of the first estimated line-to-line DC offset voltage, the second estimated line-to-line DC offset voltage, and the third estimated line-to-line DC offset voltage. Further, the electronic controller is configured determines duty cycle adjustments based on oversampling (e.g., enhanced data processing with interpolation) of smoothed or integrated representation of the first estimated line-to-line DC offset voltage, the second estimated line-to-line DC offset voltage, and the third estimated line-to-line DC offset voltage.

A system includes: an alternating current (AC) to direct current (DC) converter (AC-DC converter) including a bulk capacitor, the AC-DC converter connectable to a line voltage; a DC to DC converter (DC-DC converter) connected to the AC-DC converter, the DC-DC converter including: one or more transformers having a secondary side connectable to a battery, and a bridge rectifier connected to the secondary side of the one or more transformers, the bridge rectifier including a bridge rectifier switch; and one or more controllers configured to control an operation of the bridge rectifier switch to control a voltage of the bulk capacitor.

A system comprises: a high voltage (HV) direct current (DC) to DC converter (HVDC) including: one or more transformers; a bridge driver connected to a primary side of the one or more transformers; and one or more bridge rectifiers connected to a secondary side of the one or more transformers, the one or more bridge rectifiers including one or more bridge rectifier switches; a low voltage (LV) DC to DC converter (LVDC) connected to the HVDC; and a boost converter including: an inductor connected to the one or more bridge rectifier switches; and one or more boost configuration switches operable, in combination with the one or more bridge rectifier switches, to configure the boost converter into each of a bypass configuration and a boost configuration, to regulate a voltage at the LVDC.

The invention provides a wide-input-range voltage-adjustable resonant DC-DC converter, and the converter comprises a voltage adjusting stage which is connected with an input end, and is configured to work at a first frequency, and carries out the magnetizing and demagnetizing control of a power inductor in the voltage adjusting stage; the resonant switched capacitor topology circuit is connected to the tail end of the inductor in the voltage regulating stage, a high-low level switching node is formed at the joint, the switched capacitor topology circuit comprises a plurality of resonant tank units, and the plurality of resonant tank units work at a second resonant frequency; therefore, the voltage at the high-low level switching node is switched between the high-power value and the low-power value of the specific output voltage, and the soft switching of the switched capacitor topology circuit is realized.

The invention relates to an over-current protection circuit of a synchronous step-down DC-DC converter, and the over-current protection circuit is characterized in that one end of the over-current protection circuit is connected with one end of a power conversion circuit, the other end of the over-current protection circuit is connected with a power supply, and the other end of the power conversion circuit is connected with the power supply; and the overcurrent protection circuit is used for controlling the power tube to be closed when overcurrent occurs in the power tube in the power conversion circuit, and controlling the power tube to be opened after a preset duration. The overcurrent protection circuit can solve the overcurrent problem of the power conversion circuit.

An electric vehicle (EV) charging station for fast charging (e.g. 5 to 15 minutes) an electric vehicle (EV). The EV charging station can be configured to charge multiple EVs and multiple conventional vehicles at the same time. The EV charging station can include a power source, an electric reservoir receiving power from the power source, an AC to DC power converter for receiving AC power from the power source and converting the AC power to DC power for supplying DC power to the electric reservoir, an EV charger receiving DC power from the electric reservoir; and a first DC to DC converter receiving DC power from the electrical reservoir and converting the DC power to DC power suitable for charging the electrical vehicle.

DC-to-DC converter for multiport charging system and method thereof. For example, a DC-to-DC converter for a multiport charging system, the multiport charging system including a plurality of output ports that correspond to a plurality of DC-to-DC converters respectively, the plurality of DC-to-DC converters including the DC-to-DC converter, the plurality of output ports including a first output port that corresponds to the DC-to-DC converter, the DC-to-DC converter including: a load detector configured to: detect whether the first output port that corresponds to the DC-to-DC converter is connected to any load; and among the plurality of output ports, determine a first number of one or more output ports that are connected to one or more loads respectively; and a generator configured to: if the first output port that corresponds to the DC-to-DC converter is connected to a load, generate a first voltage as an output voltage for the first output port.

A vehicle including a Direct Current-to-Direct Current (DC to DC) converter, a low-voltage battery, a memory and a processor is disclosed. The DC to DC converter may be configured to convert a high voltage electric power to a low voltage electric power, and the low-voltage battery may be configured to be charged by the DC to DC converter via the low voltage electric power. The memory may be configured to store inputs associated with a vehicle user. The processor may be configured to determine that a trigger event has occurred, and estimate a future vehicle usage based on the inputs responsive to determining that the trigger event has occurred. The processor may further control a charging operation of the low-voltage battery by the DC to DC converter based on the future vehicle usage.

The invention provides a switched capacitor-assisted single-inductor multi-output DC-DC converter. The switched capacitor-assisted single-inductor multi-output DC-DC converter comprises a switched inductor network branch and a plurality of switched capacitor network branches, the switch inductance network branch is connected between the input end and the plurality of output ends; the plurality of switched capacitor network branches are connected in parallel with the switched inductor network branch, and the tail end of each switched capacitor network branch is connected with an output end; through linkage on-off of switches in the switched inductor network branch and the switched capacitor network branch, the switched inductor network branch and any one switched capacitor network branch cooperatively supply power to one or more output ends, and direct current flowing through an inductor in the switched inductor network branch is reduced.

A system includes: an alternating current (AC) to direct current (DC) converter (AC-DC converter), the AC-DC converter connectable to a line voltage; and a DC to DC converter (DC-DC converter) connected to the AC-DC converter, the DC-DC converter including: a high voltage buck-boost converter having a secondary side connectable to a high voltage battery; a low voltage buck-boost converter having a secondary side connectable to a low voltage battery; and one or more transformers having a primary side connected to the AC-DC converter, a secondary side connected to a primary side of the high voltage buck-boost converter, and a tertiary side connected to a primary side of the low voltage buck-boost converter.

Simultaneous parallel charging of a first and second electrical energy storage devices coupled to a charge source is carried out by directly coupling the charge source to one of the first ESD and the second ESD and through a DC to DC converter to the other of the first ESD and the second ESD. The charge source provides a current that is allocated to the two ESDs by controlling the DC to DC converter. Priority of charging may be given to either ESD.

The application discloses a DC-DC converter circuit based on over-temperature protection threshold adjustment, and an over-temperature detection module comprises: a first transistor circuit, the base of the transistor is connected with the reference voltage VBG output end of a band gap reference module, a positive temperature coefficient voltage proportional to absolute temperature is generated; a voltage dividing circuit input end is connected with the positive temperature coefficient voltage output end, the positive temperature coefficient voltage is divided to generate a detection voltage; a second transistor circuit, the base of the transistor is connected with the detection voltage output end, an over-temperature protection signal OTP is output to shut down the main circuit of the converter; an adjustment resistance circuit receives a digital adjustment signal; the digital adjustment signal changes the voltage dividing ratio of the positive temperature coefficient voltage divided to the detection voltage by controlling the equivalent resistance value of the adjustment resistance circuit; the change direction of the voltage dividing ratio is opposite to the change direction of the reference voltage VBG caused by adjustment. The application significantly improves the accuracy, consistency and overall reliability of the over-temperature protection threshold.

The invention relates to a DC-DC converter, a battery system, a verification method and a medium. The DC converter includes: a conversion circuit; an input voltage sensor detecting an input voltage input to an input terminal of the conversion circuit; an input current sensor detecting an input current input to the conversion circuit; the output voltage sensor detects the output voltage output to the output end of the driving battery conversion circuit; an output current sensor detecting an output / input current input / output to the driving battery conversion circuit; and a controller. The controller is configured to calculate an output current based on an input voltage, an input current, an output voltage and an output current; and verifying the output current sensor based on the calculated current and the detected current. In this way, the reference value is calculated by using other measured values instead of the detection value of the redundant sensor specially set for the input current, so that an additional sensor is omitted, and the space requirement is reduced.

A magnetic power conversion device includes a power plug and an AC-to-DC socket electrically connected to the power plug, wherein an AC-to-DC circuit is provided in the AC-to-DC socket; a plurality of conversion connectors are provided on the surface of the AC-to-DC socket; and a plurality of DC-to-DC converters are also provided, wherein the DC-to-DC converters are provided with connectors, which are detachably connected and arranged in the conversion connectors; and the DC-to-DC converters are also respectively connected with connecting wires for connecting to low-voltage DC electrical equipment. This allows consumers to replace their mobile phones or other electronic devices without having to replace the circuit part (i.e., the socket part) that converts AC to fixed DC, but only needs to replace the cheap DC-to-DC component (i.e., the converter part), thereby reducing consumer costs and improving resource waste. Since the conversion of AC to a fixed DC voltage is integrated into the socket, the socket part can be implemented in a multi-port parallel output form with a single set of conversion circuits.

A battery manager for a battery is disclosed. The battery manager comprises a battery charger configured to provide a first output voltage in a first voltage range, a buck-boost direct current to direct current (DC to DC) converter switchably coupled to the battery charger, and a bypass line switchably coupled between the battery charger and the battery for bypassing the buck-boost DC to DC converter. The battery manager further comprises a controller configured to electrically route the first output voltage of the battery charger to the battery via the bypass line when a voltage requirement of the battery is within the first voltage range. The controller is further configured to electrically route the first output voltage of the battery charger to the battery via the buck-boost DC to DC converter when the voltage requirement of the battery is outside the first voltage range.

Discussed is a power control apparatus and a power control method. The power control apparatus may monitor an output power of a power conversion system (PCS), detect changes in a voltage of a DC link, and control output power of a battery by comparing the output power of the PCS with a rated power of the battery, and thus, provides stabilization of an energy storage system by preventing voltage fluctuations in the DC link.

A battery manager for a battery is disclosed. The battery manager comprises a battery charger configured to provide a first output voltage in a first voltage range, a buck-boost direct current to direct current (DC to DC) converter switchably coupled to the battery charger, and a bypass line switchably coupled between the battery charger and the battery for bypassing the buck-boost DC to DC converter. The battery manager further comprises a controller configured to electrically route the first output voltage of the battery charger to the battery via the bypass line when a voltage requirement of the battery is within the first voltage range. The controller is further configured to electrically route the first output voltage of the battery charger to the battery via the buck-boost DC to DC converter when the voltage requirement of the battery is outside the first voltage range.

Embodiments of a power management unit for a device, a power management unit for a biomedical patch, and a biomedical patch are disclosed. In an embodiment, a power management unit for a battery-less device includes: a thermoelectric energy generator (TEG) harvester; a near field communication (NFC) collector; a direct current (DC)-DC converter, the DC-DC converter coupled between the TEG collector and the NFC collector; a first switch and a second switch, wherein the first switch and the second switch are coupled between the DC-DC converter and the NFC collector; a central control unit (CCU) coupled between the first switch and the second switch and configured to control the DC-DC converter; and a capacitor coupled between the CCU, the first switch, and the second switch, and a load. Other embodiments are also disclosed.

A charge recycling circuit in an integrated circuit DC-DC converter having two power MOSFETs, the charge recycling circuit comprising a single inductor and recycling MOSFET switches arranged and sized such that when one of the two power MOSFETs is turning off, its gate capacitance charges are transferred to the single inductor, stored in the single inductor and then transferred directly to the gate of the other power MOSFET to turn it on.

In accordance with one embodiment, a driver is configured to adjust a phase offset of driver control signals between corresponding switches of the same phase of the primary converter and the secondary converter consistent with the target power transfer and the estimated electromagnetic circuit inductance (e.g., comprising a leakage inductance), to minimize thermal energy dissipated from the direct-current-to-direct current converter or its transformer for the sampling time interval.

The present disclosure provides a converter including a primary stage having a plurality of primary stage switches, a secondary stage having a plurality of secondary stage switches and a capacitor, and a controller that isolates the secondary stage from a second battery, and that controls switching of the plurality of primary stage switches and the plurality of secondary stage switches to provide a plurality of bursts of energy from a first battery to the capacitor to pre-charge the capacitor to a threshold voltage, wherein after an initial burst of the plurality of bursts having an initial duration, a subsequent burst of the plurality of bursts provided has a duration equal to a duration of a preceding burst plus a time period based on a voltage of the first battery.

The present invention relates to a DC to AC power converter having a main DC input (1) and a main single-phase AC output (4), the DC to AC power converter comprising: a single DC to DC converter (5); and firstly, according to a direct path, a bidirectional voltage type DC to AC converter (6) cascaded with the DC to DC converter (5), the bidirectional voltage type DC to AC converter (6) having a DC input-output (11) connected in parallel to the DC output (10) and an AC output-input (12) connected to the main AC output (4); and secondly, according to a bypass path, and connected to the bidirectional voltage type DC to AC converter (6) and the low A current-type low-frequency full-switch H-bridge (7) having a DC input and an AC output, hereinafter referred to as an AC forward bridge, is connected in parallel with a low-frequency diode (2), the DC input is connected to the DC output (10) of the single DC to DC converter (5), and the AC output is connected in parallel with the main AC output (4), the operating frequency of the AC forward bridge is less than 1 kHz, so that when the instantaneous voltage between the terminals of the main AC output (4) reaches a predetermined level, the low-frequency forward AC bridge (7) is turned on, the low-frequency diode (2) is reverse biased and non-conductive, and the DC to DC converter (5) directly provides constant power to the load.

A DC-DC converter (1) for controlling DC output power by controlling the ON / OFF of a high-side switch (11), the DC-DC converter being provided with a control unit (2) for adjusting the OFF time of the high-side switch (11) in order to control the output power, the control unit (2) being configured so that the ON time of the high-side switch (11) is inversely proportional to the input / output voltage difference (Ei-Eo), and the ON time of the high-side switch (11) is inversely proportional to the input / output voltage difference (Ei-Eo). An input / output voltage difference (Ei-Eo) is a difference between an input voltage (E1) to the DC-DC converter (1) and an output voltage (Eo) from the DC-DC converter (1).

An isolated DC-DC converter including n conversion circuit units is provided. In each conversion circuit unit, a first connection node is formed between two switching components of a first primary bridge arm, and a second connection node is formed between two electronic components of a second primary bridge arm. A third connection node is formed between two switching components of a first secondary bridge arm, and a fourth connection node is formed between two switching components of a second secondary bridge arm. A first coupling inductor and A first capacitor are serially coupled between the first and third connection nodes. A second coupling inductor and a second capacitor are serially coupled between the second and fourth connection nodes. In the n conversion circuit units, the primary circuit units are electrically connected in series or in parallel, and the secondary circuit units are electrically connected in parallel or in series correspondingly.

A system includes: an alternating current (AC) to direct current (DC) converter (AC-DC converter), the AC-DC converter connectable to a line voltage; and a DC to DC converter (DC-DC converter) connected to the AC-DC converter, the DC-DC converter including: a high voltage buck-boost converter having a secondary side connectable to a high voltage battery; a low voltage buck-boost converter having a secondary side connectable to a low voltage battery; and one or more transformers having a primary side connected to the AC-DC converter, a secondary side connected to a primary side of the high voltage buck-boost converter, and a tertiary side connected to a primary side of the low voltage buck-boost converter.

A hybrid sensing circuit for generating a control signal for controlling a switching direct-current-to-direct-current (DC-to-DC) converter where (i) the switching DC-to-DC converter includes a first inductor-capacitor (LC) filter and (ii) a second LC filter is electrically coupled between a local output node and a remote output node of the switching DC-to-DC converter. The hybrid sensing circuit includes (a) one or more first amplifiers configured to generate a first amplifier output signal proportional to a dynamic voltage at the local output node, (b) one or more second amplifiers configured to generate a second amplifier output signal proportional to a difference between (i) a desired output voltage of the switching DC-to-DC converter and (ii) an output voltage of the switching DC-to-DC converter at the remote output node, and (c) summing circuitry configured to generate a control signal based on a sum of the first and second amplifier output signals.

DC-DC converter with an output-side storage capacitor arrangement for providing an operating voltage for an inductive load and for at least one further electronic circuit and / or electronic component of a vehicle electronics, wherein the storage capacitor arrangement is connected to the DC-DC converter via a reverse-biased diode (6) and the output-side storage capacitor arrangement is connected to a parallel circuit consisting of an electrolytic capacitor (1), a ceramic capacitor (2) and a circuit arrangement is formed with a series connection of a hybrid electrolytic capacitor (3) and a suppressor diode (4) and a resistor (5) connected in parallel to the hybrid electrolytic capacitor (3), wherein the hybrid electrolytic capacitor (3) has a lower series resistance than the electrolytic capacitor (1) and a larger capacitance than the ceramic capacitor (2), so that in the event of energy being fed back from the inductive load into the storage capacitor arrangement, the hybrid electrolytic capacitor (3) absorbs a large proportion of the energy and thus prevents a voltage increase at an output terminal above a value at which connected components can be destroyed, wherein the output terminal is the cathode terminal of the diode (6) and the inductive load can be connected to the output terminal.

The invention relates to a particularly efficient topology (12) comprising a DC-DC converter (16) that converts an input voltage (UE) with a positive (phiE+) and a negative (phiE-) input potential into an intermediate circuit voltage (UZK) with a positive (phiZK+) and a negative (phiZK-) intermediate circuit potential, and an inverter (24) that converts the intermediate circuit voltage (UZK) into an output voltage (UA), wherein the DC-DC converter (16) is configured to adjust the negative intermediate circuit potential (phiZK-) relative to the positive (phiE+) and / or negative (phiE-) input potential. The invention further relates to a particularly efficient powertrain (10) and a particularly efficient vehicle (28).