Abstract: An intelligent power module includes a power circuit board having a plurality of power devices and fixed on a base plate of a case body able to be closed with a lid to form a protective case of the intelligent power module. The intelligent power module also includes a control circuit board suitable to drive the power devices of the power circuit board. The control circuit board is associated with the lid in such a way that the control circuit board is comprised within the case body. The control circuit board and the lid thus realizing an intelligent lid of the intelligent power module.

Abstract: An intelligent power module includes a power circuit board having a plurality of power devices and fixed on a base plate of a case body able to be closed with a lid to form a protective case of the intelligent power module. The intelligent power module also includes a control circuit board suitable to drive the power devices of the power circuit board. The control circuit board is associated with the lid in such a way that the control circuit board is comprised within the case body. The control circuit board and the lid thus realizing an intelligent lid of the intelligent power module.

Abstract: A driving circuit for electronically switched motors is provided. The driving circuit includes a supply voltage rectifying stage for providing a rectified supply voltage, first switching means for switching state based on output of a first control block, magnetic means for providing a magnetic flux according to the state of the first switching means, transmission diodes for transmitting an exciting current that flows through the magnetic means, first energy storing means for storing the exciting current, an energy return stage for transferring the energy stored in the first energy storing means to the rectifying stage, and energetic conversion means for receiving the energy stored in the energy storing means through second switching means controlled by a second control block, so as to provide a current as sinusoidal as possible.

Abstract: A control device for a focusing system of a compact disk (CD) reader is provided. The control device uses fuzzy logic incorporated to the audio data processing system of the CD reader which is adapted to detect and segregate a light beam reflected by the surface of the compact disk from an incident light beam to the surface. The fuzzy logic control device receives a focus error signal and a derivative of the focus error. It then calculates, using appropriate membership functions, output signals to provide to a focusing servo-system of the CD reader to adjust the distance of the focal plane from the light beam detecting circuitry.

Abstract: A driving circuit for electronically switched motors is provided. The driving circuit includes a supply voltage rectifying stage for providing a rectified supply voltage, first switching means for switching state based on output of a first control block, magnetic means for providing a magnetic flux according to the state of the first switching means, transmission diodes for transmitting an exciting current that flows through the magnetic means, first energy storing means for storing the exciting current, an energy return stage for transferring the energy stored in the first energy storing means to the rectifying stage, and energetic conversion means for receiving the energy stored in the energy storing means through second switching means controlled by a second control block, so as to provide a current as sinusoidal as possible.

Abstract: An intelligent suction device, particularly for vacuum cleaners and the like, includes a fuzzy-logic controller for controlling the motor of a fan or turbine. The suction pressure is detected by at least one pressure sensor which feeds back its measurement, in a closed loop, to the controller.

Abstract: In a method, according to the invention, of storing one or more natural membership functions of respectively one or more natural variables being each defined within a natural universe of discourse having a lowest natural value and a highest natural value, the natural membership functions are normalized through respective normalization coefficients so that they are defined within the same predetermined absolute universe of discourse having a lowest absolute value and a highest absolute value, thereby obtaining one or more absolute membership functions, respectively, and said absolute membership functions and said normalization coefficients are stored, taking account that identical absolute membership functions are stored only once.

Abstract: A fluid flow meter is of the type including a heated probe sensor of known electric resistance dipped into or swept by a fluid stream having a predetermined velocity. The sensor is capable of converting each flow velocity value to a voltage value, and is connected to a processor operating using fuzzy logic for producing the flow measurements. The sensor may be an NTC thermistor. The thermistor may be powered from a current generator, and the processor may include a neural network. The sensor may include at least two discrete thermistors, one being a hot thermistor and the other being a cold thermistor.

Abstract: An intelligent suction device, particularly for vacuum cleaners and the like, includes a fuzzy-logic controller for controlling the motor of a fan or turbine. The suction pressure is detected by at least one pressure sensor which feeds back its measurement, in a closed loop, to the controller.

Abstract: A neural cellular network for implementing a so-called Chua's circuit, and comprising at least first, second and third cells having respective first and second input terminals and respective state terminals, the first and second input terminals being to receive a first and a second reference signal, respectively, and the first cell, and the second and third cells being of mutually different types.

Abstract: In a fully digital PWM controller employing a sine-triangle modulating technique, the method includes the step of linearizing the dependence of the selected scanning frequency of the memory containing the digital samples of the modulating sinusoid, from the value of the digital selection datum, and improves regulation at low speed by improving the resolution of selectable frequency values. The PWM driving signals produced by a fully digital controller implementing the linearization step of the invention show an F.F.T. extremely close to the F.F.T. of comparable PWM driving signals produced through a conventional analog technique.

Abstract: A process for the fuzzy control of switching power supplies which have at least one inductor and at least one switching device, and a device for performing this control, the particularity whereof resides in the fact that it comprises the following steps: measuring the value of the current on the inductor; measuring the value of the input voltage of the switching power supply; measuring an error generated between a reference voltage and an output voltage of the power supply; defining fuzzy membership functions for the value of the current on the inductor, for the input voltage value, and for the error; defining an output membership function for the value of the duty cycle of the power supply; defining multiple fuzzy inference rules to which the measured values and the membership functions are applied calculating the corresponding weight functions of the membership functions; defuzzifying the results obtained by means of the weight function calculation and the application of fuzzy rules so as to obtain a real v

Abstract: The present invention relates to an applied-voltage fuzzy control process for induction motors including the following steps: measuring a speed error by comparing the current speed of an electric motor with a reference speed; generating the derivative of this speed error; measuring a power error by comparing the power supplied to the motor with a reference power; applying a fuzzy control to the speed error, to the derivative of the speed error, and to the power error so as to generate the values of a drive voltage and a power supply pulse that are suitable to drive the electric motor. The fuzzy control is divided into two sections: a first one for motor speed control and a second one for motor power control.