Class / Patent application number | Description | Number of patent applications / Date published |
320140000 | With DC-DC converter (e.g., flyback supply, etc.) | 12 |
20080265843 | CONSERVATION OF ELECTRICAL ENERGY AND ELECTRO-MAGNETIC POWER IN BATTERY CHARGER - The present disclosure is an energy-efficient rapid battery charger, using inductive windings rather than transformer to charge a battery. The apparatus operates with an AC power source rectifying a high voltage DC output or AC source transformed to a low DC voltage output. The control driver frequencies vary from several hundred Hz to thousand of Hz. A capacitor, inductor, and power line are arranged in a series parallel combination tank circuit that operates over the on and off time of a complete cycle. During on-time, the inductor is charged with electromagnetic power. During off-time, the electromagnetic power in the inductor discharges into the battery. | 10-30-2008 |
20090033289 | VOLTAGE CONVERTER WITH COMBINED BUCK CONVERTER AND CAPACITIVE VOLTAGE DIVIDER - A voltage converter including a buck converter and a capacitive voltage divider. The converter includes four capacitors, a switch circuit, an inductor and a controller. A first capacitor is coupled between a reference node and a first output node which develops a first output voltage. A second capacitor is coupled between an input node and either the reference node or the first output node. The switch circuit couples a third capacitor between the reference and first output nodes in a first state of a PWM signal, and couples the third capacitor between the first output and input nodes in a second PWM signal state. The inductor is coupled to the third capacitor and provides a second output node coupled to the fourth capacitor providing a second output voltage. The controller controls the duty cycle of the PWM signal to regulate the second output voltage to a predetermined level. | 02-05-2009 |
20090309552 | POWER SOURCE SWITCHOVER APPARATUS AND METHOD - An apparatus for switching from a first power supply to a second power supply. Such an apparatus may determine which of the first and second power supplies has a greater voltage, and may power a device from the power supply having the greater voltage or charge. A single boost converter may be used regardless of which power supply is providing power. | 12-17-2009 |
20100033136 | Limiting primary peak charge to control output current of a flyback converter - A controller IC adjusts the on time and cycle time of current flowing through the primary inductor of a flyback converter to generate a constant output current and constant output voltage. A desired output current limit is achieved even with an inductor whose inductance varies from the stated magnitude. A transconductance current is generated from a voltage across an emitter resistor and is then integrated to generate an integrated-current voltage. An inductor switch is turned on by an oscillator signal and turned off at the earlier of when the integrated-current voltage reaches a charge limit voltage during constant current mode or when the emitter resistor voltage reaches an error voltage during constant voltage mode. Current is output independently of the primary inductance by varying the current limit voltage inversely proportionally to the input voltage and by adjusting the cycle time so that it varies inversely proportionally to the output voltage. | 02-11-2010 |
20100244775 | BIDIRECTIONAL ENERGY CONVERTER - The invention provides a bidirectional converter that operates under an AC generation mode or a charge mode. The bidirectional converter may be a single component or circuit, which may include a DC-DC conversion stage using a unique “Smith 2 Stage conversion” technique and a DC-AC conversion stage or AC-DC conversion stage using a switchable filter depending on the mode. During the charge mode, the converter may be able to control the voltage and current of the DC output using a software algorithm, to match the battery being charged, or the DC receiver. This may enable the converter to control the nature of the DC output so it can be adapted to any energy storage technology. The controllable output voltage and synchronizable frequency may allow the converter to be used in series combinations to achieve a variety of high voltage outputs from simpler building blocks. | 09-30-2010 |
20100244776 | Magnetic Motor - A magnetic motor system includes a brushless motor with interdigitated permanent magnets longitudinally mounted on a rotor at equal radial positions, and stator windings to drive the rotor in response to pulses from a timer/driver, and stationary recapture windings to recover energy that would otherwise go to waste. One set of batteries is used to drive the motor through the timer/driver, and bridge rectifiers connected to the stationary recapture windings provide electrical current to charge a second set of batteries. The rotor shaft output provides kinetic energy to drive electrical generators, air compressors, etc. A shaft encoder connected to the rotor provides the information needed by the timer/driver to know which stator winding should be pulsed and with what polarity. A power pulse is provided at least every 12.5 degrees of rotation, making the motor self starting. | 09-30-2010 |
20110241625 | CIRCUIT TOPOLOGY FOR PULSED POWER ENERGY HARVESTING - An energy harvesting circuit harvests energy from a voltage source and charges a storage element with the harvested energy. The energy harvesting circuit includes an energy source, a storage capacitor to store energy output from the energy source, a power converter circuit, an energy storage element, and an enabling circuit. The enabling circuit turns the boost converter circuit on and off according to a monitored capacitance voltage of the storage capacitor. When the boost converter circuit is turned off, the storage capacitor accumulates energy output from the energy source until a reference voltage is reached, whereupon the boost converter circuit is turned on, enabling current flow from the storage capacitor to the storage element. When the storage capacitor discharges to a minimum voltage level, the boost converter circuit is turned off. The enabling circuit and a reference voltage supply are powered by the energy source. | 10-06-2011 |
20120187921 | DC-DC CONVERTER FOR THE CONTROL OF A BATTERY CHARGE CURRENT IN PORTABLE ELECTRONIC DEVICES - A DC-DC converter controls a supply current (I | 07-26-2012 |
20120229098 | CHARGING EFFICIENCY USING SELECTABLE ISOLATION - The apparatus for charging an energy storage system (ESS) from an AC line voltage includes a boost stage for converting the AC line voltage to a first ESS charging voltage; an isolation stage, coupled to the boost stage, for converting the first ESS charging voltage to a second ESS charging voltage with the second ESS charging voltage less than the first ESS charging voltage, the isolation stage removing a common mode current between the ESS and the boost stage; a configurator, responsive to a control signal, to set a direct communication of the first ESS charging voltage to the ESS in a bypass mode and to open the direct communication of the first ESS charging voltage to the ESS in an isolation mode; and a controller, coupled to the configurator, for setting the modes responsive to a battery voltage, a peak of the AC line voltage, and a total leakage current at an input of the AC line voltage, the controller asserting the control signal to the configurator. | 09-13-2012 |
20120299553 | Bidirectional hysteretic power converter - A novel switching hysteretic bidirectional power converter is presented. The converter includes the generation of a synthetic ripple signal and feedback networks to hysteretically control the power converter both when the converter operates as a boost converter with the flow of power in one direction, and when the converter operates as a buck power converter with the flow of power in the opposite direction. | 11-29-2012 |
20140077770 | POWER FACTOR CORRECTION CIRCUIT CONTROLLING DEVICE AND CHARGING DEVICE - A power factor correction circuit controlling device has a power factor correction circuit that is connected to an AC power supply, and brings a waveform of an input current from the AC power supply close to a sine wave to correct a power factor by an on/off operation of a switching element, and a controller that controls an operation of the power factor correction circuit. The power factor correction circuit includes a current detection circuit that detects the input current, and a voltage detection circuit that detects the output voltage at the power factor correction circuit. | 03-20-2014 |
20180026546 | POWER CONVERSION DEVICE | 01-25-2018 |