摘要:
The present invention relates to a power circuit for supplying power to an intermittently operated amplification means (4), comprising a battery (1) having a full charged voltage lower than the operating voltage of the amplification means (4), a stepping up means (2) for stepping up the voltage of the battery (1) and a storing means (3) for storing the stepped up power and for supplying the stored power to said amplification means (4) only when said amplification means is operated. The power circuit further comprises a feedback loop for feedback controlling the stepped up voltage, said feedback loop comprising an activity detection means (6) for detecting the activity level of the stepping up means (2). The present invention also relates to a corresponding method for controlling a power circuit. In an ideal case of the invention, the current drawn from the battery is a pure DC current and the voltage has no ripple.
摘要:
An electronic ignition system for internal combustion engines, of capacitor discharge type. The system comprises a magneto generator (10) for supplying the electrical power to a capacitive-discharge ignition module (12) and to a service load circuit (13); the output of the generator (10) may be connected to service load circuit (13) by an ON/OFF voltage regulator (T1), and to the ignition module (12) by a voltage booster (T3) and an electronic switch (T2). A process logic unit (16) controls the whole ignition system and is programmed to actuate the voltage regulator, the electronic switch and the booster (T1, T2, T3) of the ignition system so that the ignition capacitor (C) is charged and the service load circuit (13) is supplied in a differentiated manner and at different times.
摘要:
A switching regulator comprises a single transformer (10) having a primary winding (10a) connected in an input circuit (11) for receiving direct-current energy and a secondary winding (10b) connected in an output circuit (12), and a switching transistor (21) connected in series with the primary winding (10a). A high frequency pulse generator (22) triggers the switching transistor so that it interrupts the direct-current energy at a high frequency. A rectifier (43) is provided for converting high frequency energy developed in the secondary winding into direct-current output energy, which is maintained constant by controlling the high frequency pulse generator. A low voltage detector (24) produces a signal when the direct-current energy in the input circuit falls below a specified value. In response to the signal from the low voltage detector, constant direct-current energy is derived from a battery (40) and applied to the output circuit as backup power.
摘要:
A power system for providing a supply voltage to a computer and automatically varying said supply voltage responsive to the magnitude of the current being supplied to the computer, said power system comprising: a supply voltage circuit for generating at an output terminal said supply voltage and said current being supplied to the computer, said supply voltage circuit having a control terminal for receiving a control signal for varying said supply voltage between a first voltage level and a second voltage level in accordance with the magnitude of said control signal; and a current sensing circuit for sensing said current provided to the computer, said current sensing circuit generating at its output said control signal such that said control signal varies in magnitude in accordance with said current sensed, so as to vary said supply voltage between said first and second voltage levels.
摘要:
L'alimentation stabilisée comporte un transformateur secteur (5) suivi par un redresseur monophasé ou polyphasé (6) et par un intégrateur. La sortie positive du pont est connectée à l'entrée négative d'un régulateur de tension différentielle (8). La sortie positive du régulateur est connectée directement à la charge (13). La sortie négative du pont est connectée à la masse. La tension différentielle est asservie par une boucle de contre-réaction qui neutralise les variations amont et aval ainsi que les ondulations résiduelles. Cette tension différentielle (Udiff) est obtenue par une source indépendante à découpage à très haut rendement (UI). Elle fournit un apport de puissance supplémentaire qui s'ajoute à la puissance de sortie du transformateur.
摘要:
Convertisseur élévateur de tension, à partir d'une source de courant continu (1), comprenant un hacheur de courant (3), un transformateur dont l'enroulement primaire (4) est en série avec le hacheur, et dont le secondaire (6) est relié à un circuit de redressement et de filtrage (7) en série avec lui, lui-même relié à un circuit d'utilisation (8), une boucle (9) de mise en série du circuit d'utilisation reliée au secondaire et à la source d'alimentation, et un enroulement de récupération de l'énergie de démagnétisation. L'enroulement de récupération de l'énergie de démagnétisation (16) est relié aux bornes (18, 10) du circuit d'utilisation en aval du circuit de redressement et de filtrage (7).
摘要:
A power supply apparatus comprises power supplies (12, 14) that share the power requirements of a common lead (20) approximately equally. Either of the power supplies (12, 14) can act as the «master» while the other power supply acts as the «slave». The arrangement utilises an integrating differential error amplifier (54), an inverting amplifier (56), and a noninverting amplifier (58) which are electrically connected between the common load (20) and the power supplies (12, 14) to detect any difference in the output current of the power supplies (12, 14) due to a difference in output voltage, and to correct the difference by increasing the output voltage of the power supply having the lower output voltage until the difference is eliminated. In this manner, either power supply (12, 14) can act as the «master» while the other power supply acts as the «slave».
摘要:
A power supply comprises at least two supply circuits the output terminals of which are connected in series to supply a voltage across a load (V L ). Each circuit comprises a D.C. voltage source (Vm) in series with a switching valve (S), the maximum voltage across which is limited by diodes (D,) connected across the output terminals of the respective supply terminals, and a protection circuit (4). The protection circuit responds to the current flowing through the load, and on the occurrence of a first current threshold switches off the valve (S), and in the event of a higher current threshold fires a crowbar link (1) which shunts the source (Vm).