摘要:
A high-voltage generator of an X-ray apparatus comprises a high-voltage measurement device. The measurement device comprises a compact component comprising both the measurement resistor and a film capacitor used both to protect said resistor and eliminate the parasitic effects induced by parasitic capacitances of the generator. The film capacitor is made in insulating films by a sequence of metalized strips and insulating strips. The films are positioned relative to one another in such a way that the film capacitor is formed by series-mounted discrete capacitors. To this end, between two successive films, the width of the bottom strips of the film crosses two metalized strips of the top film.
摘要:
A high-voltage (HV) generator of an X-ray device comprises a high-voltage measurement device. The measurement device comprises a compact component integrating both the measurement resistor and the capacitors enabling both the protection of said resistor and the elimination of the parasitic effects of the generator. The capacitors are made on insulating plates preferably made of ceramic, a succession of metallized strips and insulating strips. The plates are positioned relative to one another in such a way that the capacitors are discrete and series-mounted. To do this, between two successive plates, the metallized strips of the bottom plate overlap two metallized strips of the plate directly above.
摘要:
A system and method to improve the high voltage performance of an x-ray tube with electrostatic deflection of an electron beam focal spot. The system and method provides protection of bias circuits from high voltage transients and spit protection in x-ray tubes through the use of a high voltage transient suppression and spit protection circuit assembly coupled between the bias circuits of a high voltage generator and an x-ray tube vacuum housing of an x-ray generation system.
摘要:
An electrical power supply of an X-ray tube. A high voltage generation device having a primary capacitor is configured to transmit a high voltage to the X-ray tube. At least one voltage source is configured to supply the primary capacitor. An energy storage device has an auxiliary capacitor that is configured to receive from the primary capacitor a quantity of energy and to return said energy to the primary capacitor. A control device arranged in series between the high voltage generation device and the storage device is configured to connect or isolate the storage device from the high voltage generation device so the X-ray tube is powered by a variable high voltage very rapidly between a first high voltage and a second high voltage.
摘要:
A power generation system comprises a power source, a transformer module for converting a low voltage from the power source into a higher voltage, and a voltage-multiplier module for amplifying higher voltage from the transformer module. The transformer module comprises a number N of transformer units. Each transformer unit comprises at least one transformer, and each transformer comprises a magnetic core, a primary winding, and a secondary winding. Primary windings of the transformers in the transformer module are electrically coupled in parallel to the power source, secondary windings of the transformers of each transformer unit comprise a pair of output terminal, and N is equal to or greater than two. The voltage-multiplier module comprises the number N of multipliers. Each multiplier module comprises a positive and a negative input terminal, and a positive and a negative output terminal. Positive and negative terminals of each multiplier are electrically coupled to the positive and negative output terminals of a corresponding transformer unit, and positive and negative output terminals of the multipliers are connected in series.
摘要:
A high-voltage transformer has a plurality of elementary transformers. Each elementary transformer comprises an elementary primary circuit configured to be powered by an elementary primary voltage, an elementary secondary circuit comprising at least one secondary winding and at least one capacitor that is connected to the terminals of a secondary winding, and an elementary magnetic circuit configured to couple the elementary primary circuit and the elementary secondary circuit. The output voltage of the transformer is equal to the sum of the elementary balanced secondary voltages, and the elementary primary circuits are connected to one another so as to form a common circuit with the elementary transformers. The common circuit is configured to be supplied by a primary voltage, which is equal to the sum of the elementary primary voltages.
摘要:
Disclosed are a device and a method to control the speed of two-phase or three-phase A.C. motors by means of a three-phase converter. The switching-over instants of the switches of the converter for the control of a two-phase motor are computed so that the signals at the common points of each pair of switches are phase shifted with respect to one another and have no low-order harmonic components. The disclosed device and method are applicable to motors driving rotating anodes for X-ray tubes.
摘要:
A system and method to improve the high voltage performance of an x-ray tube with electrostatic deflection of an electron beam focal spot. The system and method provides protection of bias circuits from high voltage transients and spit protection in x-ray tubes through the use of a high voltage transient suppression and spit protection circuit assembly coupled between the bias circuits of a high voltage generator and an x-ray tube vacuum housing of an x-ray generation system.
摘要:
An electrical power supply for an X-ray tube comprising a current source, a transformer with a primary circuit and a secondary circuit coupled with a resistor (R), the unit supplying a high-voltage generator provided with an equivalent input capacitor is used, when the generator is powered on, to limit the intensity of the inrush current appearing in the circuit.
摘要:
A high-voltage transformer has a plurality of elementary transformers. Each elementary transformer comprises an elementary primary circuit configured to be powered by an elementary primary voltage, an elementary secondary circuit comprising at least one secondary winding and at least one capacitor that is connected to the terminals of a secondary winding, and an elementary magnetic circuit configured to couple the elementary primary circuit and the elementary secondary circuit. The output voltage of the transformer is equal to the sum of the elementary balanced secondary voltages, and the elementary primary circuits are connected to one another so as to form a common circuit with the elementary transformers. The common circuit is configured to be supplied by a primary voltage, which is equal to the sum of the elementary primary voltages.