| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 363076000 | Including integral sensing and control means for rectifier | 7 |
| 363077000 | With semiconductor conversion means | 7 |
| 20080291709 | Switching power supply apparatus - A switching power supply apparatus | 11-27-2008 |
| 20100226153 | METHOD AND ARRANGEMENT IN CONNECTION WITH HALF-CONTROLLED NETWORK BRIDGE - A method and an arrangement for controlling phase-specific thyristors of a half-controlled network bridge. The method comprises the steps of identifying continuously a thyristor to be controlled on the basis of magnitudes of supplying phase voltages; controlling the thyristor by enabling a current flow to its gate current circuit through an inductive component of a constant current regulator, which constant current regulator is common to all the gate current circuits, the thyristor control comprising the steps of determining a magnitude of the gate current at the potential of the gate conductor in the constant current regulator, alternately switching the voltage producing the gate current off from the gate current circuit when the gate current is higher than a predetermined limit, and switching the voltage producing the gate current on in the gate current circuit when the gate current is lower than a predetermined limit. | 09-09-2010 |
| 20140043875 | OFF-LINE REGULATOR AND ASSOCIATED METHOD - The present invention discloses an off-line regulator. The off-line regulator comprises a rectification circuit configured to rectify an AC line voltage into a rectified line voltage; a pass device coupled between the rectified line voltage and a first capacitor, the pass device is configured to be turned ON or OFF according to a comparison signal indicating whether the rectified line voltage is over a threshold voltage. The first capacitor delivers an interim voltage into a converter which supplies power to a load. Wherein a second capacitor coupled across a driver which driving the pass device is charged by the first capacitor when the comparison signal is at a first state, and the driver is boosted when the comparison signal is at a second state. | 02-13-2014 |
| 20140126257 | CONTROL CIRCUITS FOR POWER CONVERTERS - A control circuit for controlling one or more power switches of a power converter includes a voltage control loop and a current control loop. The control circuit is configured to generate a current reference for the current control loop using the voltage control loop and an AC reference signal. The control circuit is configured to operate in at least a first mode in which a parameter of the voltage control loop is sampled only at every other zero crossing of the AC reference signal and the sampled parameter is used to generate the current reference for the current control loop. The power converter may be an AC-DC converter or a DC-AC converter (i.e., inverter). Alternatively, the voltage control loop may be sampled at every zero crossing of the AC reference signal, and/or more frequently during transient load conditions. | 05-08-2014 |
| 20140192574 | TECHNIQUE FOR REDUCING POWER CONSUMED BY ELECTRIC EQUIPMENT - When an image forming apparatus shifts to a power saving mode, a controller unit further reduces power consumption by switching AC current on/off every predetermined amount of time. When AC current input from a commercial AC power supply is turned off, a DC voltage generating circuit normally can no longer supply a DC voltage, rendering the controller unit unable to operate. Accordingly, the controller unit operates using a charge accumulated in a smoothing capacitor while the AC current is not being supplied. An AC cutting circuit is switched on before a both-end voltage at the smoothing capacitor drops below a lower limit of operation voltage of the DC voltage generating circuit, and the smoothing capacitor is recharged. | 07-10-2014 |
| 20150043258 | POWER CONVERSION APPARATUS - A controller outputs pulse signals to a first switch and a second switch based on a circuit current flowing through a power conversion circuit and a voltage of an AC power supply. The first switch is opened and closed alternately to the second switch. According to the opening and closing, a current in which a high frequency component is mixed with a low frequency component of the AC power supply flows through the power conversion circuit. | 02-12-2015 |
| 20160049856 | ACTIVE SWITCHING RECTIFIER EMPLOYING MOSFET AND CURRENT-BASED CONTROL USING A HALL-EFFECT SWITCH - An active switching rectifier circuit uses a MOSFET and applies a current based control to turn the MOSFET on and off. The MOSFET has its source and drain connected between an AC phase line and the DC output. A current detection and control circuit has an input current conductor coupled in series with the source-drain current of the MOSFET; it outputs a switching control signal based on the current in its input conductor and applies the signal to the gate of the MOSFET for on/off control. A Hall-effect switch may be used in the current detection and control circuit. The rectifier may also include a voltage supply circuit coupled to the AC source for supplying a floating DC voltage to the current detection and control circuit. The rectifier circuit can be adapted for various configurations including single-phase half-wave, center-tap dual-phase full-wave, single-phase full-wave, and three-phase full-wave. | 02-18-2016 |
