Patent application number | Description | Published |
20090134713 | CONTROLLING INDUCTIVE POWER TRANSFER SYSTEMS - An inductive power transfer system comprises a primary unit | 05-28-2009 |
20090322158 | CONTROLLING INDUCTIVE POWER TRANSFER SYSTEMS - An inductive power transfer system ( | 12-31-2009 |
20110006613 | CONTROLLING INDUCTIVE POWER TRANSFER SYSTEMS - An inductive power transfer system comprises a primary unit | 01-13-2011 |
20110285214 | CONTROLLING INDUCTIVE POWER TRANSFER SYSTEMS - An inductive power transfer system comprises a primary unit, having a primary coil and an electrical drive unit which applies electrical drive signals to the primary coil so as to generate an electromagnetic field. The system also comprises at least one secondary device, separable from the primary unit and having a secondary coil which couples with the field when the secondary device is in proximity to the primary unit. A control unit causes a circuit including said primary coil to operate, during a measurement period, in an undriven resonating condition. In this condition the application of the drive signals to the primary coil by the electrical drive unit is suspended so that energy stored in the circuit decays over the course of the period. A decay measurement unit takes one or more measures of such energy decay during the measurement period. In dependence upon said one or more energy decay measures, the control unit controls the electrical drive unit so as to restrict or stop inductive power transfer from the primary unit. | 11-24-2011 |
20120068536 | CONTROLLING INDUCTIVE POWER TRANSFER SYSTEMS - An inductive power transfer system comprises a primary unit operable to generate an electromagnetic field and at least one secondary device, separable from the primary unit, and adapted to couple with the field when the secondary device is in proximity to the primary unit so that power can be received inductively by the secondary device from the primary unit without direct electrical conductive contacts therebetween. The system detects if there is a substantial difference between, on the one hand, a power drawn from the primary unit, and on the other hand, a power required by the secondary device or, if there is more than one secondary device, a combined power required by the secondary devices. Following such detection, the system restricts or stops the inductive power supply from the primary unit. Such a system can detect the presence of unwanted parasitic loads in the vicinity of the primary unit reliably. | 03-22-2012 |
20120250359 | GRID TIED INVERTER, SYSTEM AND METHOD - A grid tied inverter connectable to an electricity grid, the grid tied inverter comprising a DC to DC current fed push-pull converter operable to generate a current waveform from a DC voltage source, the current waveform being substantially synchronised to the electricity grid, the push-pull converter comprising a transformer having a first side connectable to a battery and a second side connectable to the grid, wherein each of the two primary sides is connected to ground via a switching transistor; and | 10-04-2012 |
20120250372 | GRID TIED INVERTER, SYSTEM AND METHOD - A grid tied inverter comprising an unfolding circuit connectable to an electricity grid; and a DC to DC current fed converter operable to generate a current waveform from a battery, the current waveform being substantially synchronised to the electricity grid, wherein the unfolding circuit is operable, in a first mode, to convert the current into a sinusoidal waveform have an instantaneous voltage suitable for injection onto the grid. | 10-04-2012 |
20120250374 | GRID TIED INVERTER, SYSTEM AND METHOD - A grid tied inverter connectable to an electricity grid, the grid tied inverter comprising a DC to DC current fed push-pull converter operable to generate a current waveform from a DC voltage source, the current waveform being substantially synchronised to the electricity grid, and a transformer having a first side connected to the DC to DC current fed converter and a second side having an output line connectable to the grid. | 10-04-2012 |
20130214608 | POWER CONTROL DEVICE - To solve problems arising when a power conditioner equivalent to that connected to a solar panel is connected to a power storage device. | 08-22-2013 |
20130214763 | POWER CONTROL DEVICE AND POWER CONTROL METHOD - Used electric energy is collected while maintaining accuracy. | 08-22-2013 |
20140001877 | CONTROLLING INDUCTIVE POWER TRANSFER SYSTEM | 01-02-2014 |
20140077615 | CONTROLLING INDUCTIVE POWER TRANSFER SYSTEMS - An inductive power transfer system comprises a primary unit, having a primary coil and an electrical drive unit which applies electrical drive signals to the primary coil so as to generate an electromagnetic field. The system also comprises at least one secondary device, separable from the primary unit and having a secondary coil which couples with the field when the secondary device is in proximity to the primary unit. A control unit causes a circuit including said primary coil to operate, during a measurement period, in an undriven resonating condition. In this condition the application of the drive signals to the primary coil by the electrical drive unit is suspended so that energy stored in the circuit decays over the course of the period. A decay measurement unit takes one or more measures of such energy decay during the measurement period. In dependence upon said one or more energy decay measures, the control unit controls the electrical drive unit so as to restrict or stop inductive power transfer from the primary unit. | 03-20-2014 |