Patent application number | Description | Published |
20120078556 | CURRENT MEASUREMENT IN SWITCHED MODE POWER SUPPLY - A method of determining a current in a switched mode power supply. The method comprises: storing values representing at least one pre-calculated matrix A; receiving measured current values; and using the stored values representing the matrix A and the received current values to calculate a respective initial value for each of the coefficients of the line and for each measured current value: calculating an estimated current using the equation of the line and the calculated initial values of the coefficients; determining a difference between the measured current value and the estimated current value to generate a difference value, and comparing the difference value against a threshold and, if the difference value is greater than the threshold, calculating updated values of the coefficients using stored values representing matrix A and difference value. A value for the current in the switched mode power supply is determined using the updated values of the coefficients | 03-29-2012 |
20120098334 | Intermediate Bus Architecture Power Supply Controller - A voltage controller ( | 04-26-2012 |
20120098553 | CAPACITANCE DETERMINATION IN A SWITCHED MODE POWER SUPPLY - A method of determining a measure of a total capacitance of one or more capacitive elements connected to an output of a switched mode power supply is described. The method includes generating a voltage control signal to cause an output voltage control signal age controller to sweep a voltage at the output of the switched mode power supply from an initial voltage value to a final voltage value. Sample values of a current at the output measured by a current sampler during the sweep of the output voltage are received, and an integrated current value representing a measure of the total capacitance using the received sample values is calculated. | 04-26-2012 |
20120200331 | DIGITAL CONTROL UNIT HAVING A TRANSIENT DETECTOR FOR CONTROLLING A SWITCHED MODE POWER SUPPLY - A switched mode power supply (SMPS) comprising a feedback unit, voltage feed forward (VFF) compensation signal generator and a transient detector. A VFF compensation signal is only applied to the output of the feedback unit when a transient is detected by the transient detector on the input voltage of the SMPS, thereby saving power and computation time. The transient detector comprises a first comparator to detect that a positive transient has occurred if a difference signal is greater than a positive threshold level; a second comparator to determine if the difference signal is within a predetermined range of positive values and output a result that indicates if the difference signal is within the predetermined range of positive values; and a first calculator to detect that a positive transient has occurred if, out of a first predetermined number of consecutive results of the output of the second comparator, there is at least a second predetermined number of results indicating that the difference signal is within the predetermined range of positive values. The transient detector comprises further features for similarly detecting a negative transient. | 08-09-2012 |
20120287681 | Switching Delay Controller for a Switched Mode Power Supply - A switching delay controller ( | 11-15-2012 |
20120319504 | CONTROL OF DYNAMIC BUS VOLTAGE IN AN INTERMEDIATE BUS ARCHITECTURE POWER SYSTEM - To reduce power loss in an intermediate bus architecture power system, embodiments of the present invention provide an intermediate bus converter which converts an input voltage to an intermediate bus voltage using a converting unit; receives a signal indicative of an output of a converting unit; determines an intermediate bus voltage to reduce power loss in dependence upon the signal indicative of an output of the converting unit; generates a control signal to control the converting unit to convert the input voltage to the determined intermediate bus voltage; and generates an intermediate bus voltage in dependence upon the control signal. | 12-20-2012 |
20130119962 | Intermediate Bus Architecture Power Supply Controller - A voltage controller is operable to generate control signals for controlling an intermediate bus voltage (V | 05-16-2013 |
20130141945 | Start-Up Procedure For An Isolated Switched Mode Power Supply - An isolated switched mode power supply, SMPS, comprises a switching controller operable to generate start-up switching control signals during start-up of the isolated SMPS, and operational switching control signals of period T during subsequent operation of the isolated SMPS. The SMPS further comprises a transformer having a primary winding and a full-bridge drive circuit arranged to drive the primary winding of the transformer in response to the switching control signals. The full-bridge drive circuit has: a first switching element and a boot-strap driving circuit arranged to switch the first switching element in response to the switching control signals, the boot-strap driving circuit having a boot-strap capacitor. The full-bridge drive circuit further comprises a second switching element connected to the first switching element and to the boot-strap driving circuit, and arranged to conduct a current to charge the boot-strap capacitor when switched ON in response to the switching control signals. The switching controller is operable to start up the isolated SMPS by: determining a duty cycle D for the operational switching control signals based on a voltage an output of the isolated SMPS and generating the start-up switching control signals comprising a first voltage pulse of duration P | 06-06-2013 |
20130155727 | ISOLATED SWITCHED MODE POWER SUPPLY - An isolated switched mode power supply comprises a transformer, with primary and secondary windings, and a rectification network connected to the secondary winding. The rectification network and the transformer are arranged such that, during a free-wheeling period of operation of the switched mode power supply, a magnetic flux from a first portion of a secondary winding of the transformer substantially cancels a magnetic flux from a second portion of the secondary winding between the first and second portions of the secondary winding. Additionally, a secondary side circuit connected to the secondary winding comprises a switching device, which is connected to a centre-tap, provided between the first and second portions of the secondary winding, and an output of the rectification network so as to conduct at least a part of a free-wheeling current flowing in the secondary side circuit during the free-wheeling period. | 06-20-2013 |
20130343094 | Controlling a Switched Mode Power Supply with Maximised Power Efficiency - A control circuit for a switched mode power supply (SMPS) has an input voltage reference voltage generator arranged to receive a signal indicative of an input voltage of the SMPS and is arranged to generate a reference signal directly proportional to the input voltage. An error signal generator of the control circuit is arranged to receive a signal indicative of an output voltage of the SMPS and arranged to generate an error signal based on the reference signal generated by the input reference voltage generator and based on the output voltage of the SMPS. A duty cycle control signal generator of the control circuit is arranged to generate a control signal, to control the duty cycle of the SMPS, in dependence upon the error signal. | 12-26-2013 |
20140167901 | PLANAR TRANSFORMER - A multi-layered printed circuit board, PCB, includes first windings for a first side of a planar magnetic transformer and second windings for a second side of the planar magnetic transformer. The PCB further includes conductive layers configured as the first windings, conductive layers configured as the second windings, and layers of an isolation material. Each layer of the isolation material is arranged between two conductive layers to provide electrical isolation between the two conductive layers. A group of two or more adjacent conductive layers are all conductive layers of the first windings and are all arranged between two conductive layers of the second windings. The thickness of the isolation material between the group of adjacent conductive layers of the first windings is less than the thickness of the isolation material between a conductive layer of the second windings and a conductive layer of the first windings. | 06-19-2014 |
20140327414 | METHOD FOR OPERATING A POWER CONVERTER MODULE AND A DEVICE THEREFOR - The present disclosure relates to methods, a system and a module for operating a power converter module. The power converter module comprises a voltage converter, an output circuitry and a processing circuitry operable for controlling the voltage converter. One method comprises transmitting a first status signal representing operating parameters of the voltage converter to the processing circuitry. Determining whether the first status signal of the voltage converter is acceptable. The method also comprises transmitting a second status signal representing the operating parameters of the output circuitry to the processing circuitry. The method also comprises determining if the second status signal is above a predetermined threshold value. When the second status signal is above said predetermined threshold value and the status of the voltage converter is acceptable, entering a peak output mode operating the voltage converter at maximum power dissipation. | 11-06-2014 |
20150028843 | METHOD FOR REMOTE CONTROL OF A POWER CONVERTER MODULE AND A DEVICE - The present disclosure relates to methods, systems and a module for operating a power converter module, the power converter module comprises a voltage source, a remote control terminal configured to be connected to a voltage potential for remote control of the power converter module. A voltage converter is configured to send an alarm signal, determine the voltage potential of the remote control terminal, and control an output voltage of the voltage converter at an output terminal of the power converter module based on the determined voltage potential of the remote control terminal. An alarm branch is configured to change the voltage potential of the remote control terminal by a voltage source in response to an alarm signal from the voltage converter when the remote control terminal is connected to a voltage potential, thereby causing the voltage converter to control the output voltage at the output terminal. | 01-29-2015 |
20150029760 | VOLTAGE FEED-FORWARD COMPENSATION AND VOLTAGE FEEDBACK COMPENSATION FOR SWITCHED MODE POWER SUPPLIES - A digital control unit generates a control signal to control a duty cycle of a switched mode power supply such that a faster response to an input voltage transient is achieved. The digital control unit comprises a feedback compensator, a feed forward compensator, a transient detector, and a controller. The transient detector receives a signal indicative of the input voltage of the switched mode power supply and detects transients on the received signal. The feedback compensator receives a signal indicative of the output voltage of the switched mode power supply and adjusts the control signal. The feed forward compensator receives a signal indicative of the input voltage of the switched mode power supply, performs a relatively fast, but coarse, adjustment of the control signal, and then performs a more accurate, but relatively slow, adjustment of the control signal. | 01-29-2015 |
20150055375 | Controlling a Switched Mode Power Supply with Maximised Power Efficiency - A control circuit, that controls the duty cycle of a switched mode power supply, comprises a reference voltage generator that, responsive to the input voltage exceeding a threshold value, generates a predetermined reference signal. Responsive to the input voltage not exceeding the threshold value, the reference voltage generator receives a signal indicative of an input voltage of the switched mode power supply and generates a variable reference signal dependent upon the input voltage. The control circuit further comprises an error signal generator that receives a signal indicative of an output voltage of the power supply and generates an error signal based on the reference signal generated by the reference voltage generator and based on the output voltage. The control circuit also includes a duty cycle control signal generator that generates the control signal to control the duty cycle of the power supply in dependence upon the error signal. | 02-26-2015 |