# Nachev

## Blagovest Georgiev Nachev, Varna BG

Patent application number | Description | Published |
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20100201297 | METHOD FOR CONTROL OF SYNCHRONOUS ELECTRICAL MOTORS - Method for control of synchronous electrical motors that enables determining continuously in time the motor load angle and speed of rotation without using additional rotor position sensors. The method is realized with solving the set of differential equations that govern the currents and the voltages in the stator windings of the motor for the time intervals between each two consecutive reachings of the currents in the windings to their set values and deriving relationships between the induced in the windings back-electromotive force voltages and the parameters of the Pulse Width Modulation. The parameters of the Pulse Width Modulation are measured and stored in memory and based on the derived relationships the values of the back-electromotive force voltages are calculated at every moment in time and from these values subsequently the values of the load angle and the angular rotor speed of the motor are calculated. | 08-12-2010 |

20120098473 | METHOD FOR CONTROL OF SYNCHRONOUS ELECTRICAL MOTORS - Method for control of synchronous electrical motors with application for stepper and Brush-Less Direct Current motors for which there is an explicit relation between the active electrical power supplied to the motor and the mechanical power that the motor delivers to the load. The active electrical power Pel consumed by the motor is measured and according to FIG. | 04-26-2012 |

20130113403 | METHOD FOR CONTROL OF SYNCHRONOUS ELECTRICAL MOTORS - Method for control of synchronous electrical motors that enables determining the instantaneous motor load angle and rotor speed without using rotor position sensors. The method is realized with solving the set of differential equations that govern the currents in the stator windings of the motor for the time intervals between each two consecutive crossings of the currents in the windings of their set values and deriving relationships between the induced in the windings back-electromotive force voltages and the parameters of the Pulse Width Modulation. The parameters of the Pulse Width Modulation are measured and stored in a memory and based on the derived relationships the values of the back-electromotive force voltages are calculated continuously in time. From the values of the back-electromotive force voltages the motor load angle and rotor speed are calculated and used as feedback signals for the closed-loop control of the motor. | 05-09-2013 |

## Parashkev Nachev, London GB

Patent application number | Description | Published |
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20100265458 | CONTACT LENS FOR TREATING BINOCULAR DIPLOPIA - A contact lens for treating binocular diplopia, the contact lens comprising: a central region adapted to degrade light passing therethrough, so as to create a central scotoma in a patient's eye in which the contact lens is placed in use; and a peripheral region adapted to degrade light passing therethrough to a lesser extent than in the central region, or not at all; such that, in use, an image in the field of view of the said eye is degraded only in the centre or to a greater extent in the centre than in the periphery. Also provided is a method of manufacturing such a lens, and a method of treating binocular diplopia comprising applying such a lens to a patient's eye. | 10-21-2010 |

20130304710 | METHOD AND SYSTEM FOR ANOMALY DETECTION IN DATA SETS - A method and apparatus for detecting and segmenting anomalous data in an input data set such as an image is described, which makes use of a normalised distance measure referred to as a zeta distance score. A test data point from an input test data set is compared with its corresponding nearest neighbouring standard data points in standard data sets representing variation in normal or expected data values, and the average distance from the test data point to the standard data points is found. An additional average distance measure representing the average distance between the different nearest neighbouring corresponding standard data points is also found, and a normalised distance measure obtained by finding the difference between the average distance from the test data point to the standard points and the average distance between the nearest neighbouring standard data points themselves. Where the input test data set is an image then a zeta distance score map can be found. By then thresholding the zeta distance scores obtained for the input data set using an appropriate threshold, anomalous data in the data set with a high zeta distance score can be identified, and segmented. | 11-14-2013 |

## Radek Georgiev Nachev, Varna BG

Patent application number | Description | Published |
---|---|---|

20100201297 | METHOD FOR CONTROL OF SYNCHRONOUS ELECTRICAL MOTORS - Method for control of synchronous electrical motors that enables determining continuously in time the motor load angle and speed of rotation without using additional rotor position sensors. The method is realized with solving the set of differential equations that govern the currents and the voltages in the stator windings of the motor for the time intervals between each two consecutive reachings of the currents in the windings to their set values and deriving relationships between the induced in the windings back-electromotive force voltages and the parameters of the Pulse Width Modulation. The parameters of the Pulse Width Modulation are measured and stored in memory and based on the derived relationships the values of the back-electromotive force voltages are calculated at every moment in time and from these values subsequently the values of the load angle and the angular rotor speed of the motor are calculated. | 08-12-2010 |

20120098473 | METHOD FOR CONTROL OF SYNCHRONOUS ELECTRICAL MOTORS - Method for control of synchronous electrical motors with application for stepper and Brush-Less Direct Current motors for which there is an explicit relation between the active electrical power supplied to the motor and the mechanical power that the motor delivers to the load. The active electrical power Pel consumed by the motor is measured and according to FIG. | 04-26-2012 |

20130113403 | METHOD FOR CONTROL OF SYNCHRONOUS ELECTRICAL MOTORS - Method for control of synchronous electrical motors that enables determining the instantaneous motor load angle and rotor speed without using rotor position sensors. The method is realized with solving the set of differential equations that govern the currents in the stator windings of the motor for the time intervals between each two consecutive crossings of the currents in the windings of their set values and deriving relationships between the induced in the windings back-electromotive force voltages and the parameters of the Pulse Width Modulation. The parameters of the Pulse Width Modulation are measured and stored in a memory and based on the derived relationships the values of the back-electromotive force voltages are calculated continuously in time. From the values of the back-electromotive force voltages the motor load angle and rotor speed are calculated and used as feedback signals for the closed-loop control of the motor. | 05-09-2013 |