Abrégé

Disclosed is a dual-input circuit, adopting a contactor as a switching device, and being more suitable for medium and high-power applications. In addition, the adopted contactor is a single double-pole double-throw contactor with an interlocking function. In this way, the circuit is safe, simple, and easily controllable, and space utilization can be further improved. In addition, the adopted contactor further is of a magnetic attraction type, with lower power consumption for long-term work. In the present invention, either one of two inputs is set as a main input and the other is set to a backup input by default, so that the present invention can be more flexibly applied and is more applicable. To enable switching when both or only either one of the two inputs has an input voltage, the present invention further adopts a single dual-input auxiliary power supply to reduce a required space and further reduce costs.

Classes IPC  ?

• H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
• H01H 13/46 - Dispositions à action brusque consécutive à la déformation d'éléments élastiques utilisant la flexion de ressorts à lames deux ressorts à lames séparées formant une genouillère

Abrégé

A dual input circuit, which uses a contactor as a switching device and is more suitable for medium- and high-power scenarios. The contactor that is used is, at the same time, a single double-pole double-throw contactor and itself has an interlock function. The circuit is safe, simple, easy to control, and can increase the utilization rate of space. Moreover, the contactor that is used is magnetic retention attraction-type and consumes little power for long-term operation. By means of configuring two default inputs, any one of which is the main input and the other is the backup input, thus application is more flexible and has higher adaptability. In order to perform switching when there is an input voltage in two inputs or only any one of the inputs, and a single dual input auxiliary power supply is further used. Compared with a solution of using two single input auxiliary power supplies, the required space can be reduced, and the costs can also be reduced.

Classes IPC  ?

• H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique

Abrégé

A battery charging and discharging circuit comprises a power supply, a charging branch circuit (21), a discharging branch circuit (22), and a protective branch circuit (23). The battery charging and discharging circuit does not use an energy consumption element, and accordingly, the working efficiency of the whole battery charging and discharging circuit is improved, and it is not easy to cause the problem of heat dissipation, and high-capacity batteries can be simultaneously charged and discharged when multiple charging and discharge circuits are connected in parallel. In addition, short circuit or damage of a signal device does not cause the overall failure of the charging and discharging circuit.

Classes IPC  ?

• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
• H02H 7/18 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour pilesCircuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour accumulateurs

Abrégé

A load fuse detection device and a power source system. The load fuse detection device comprises a fuse state detection module (51) and an alarm module (52), wherein the fuse state detection module (51) comprises a state detection unit and an auxiliary power source, where the state detection unit being used for detecting whether corresponding load fuses are disconnected or not, and the auxiliary power source being used for guaranteeing the normal operation of the state detection unit when the corresponding load fuses are not disconnected; and the alarm module (52) is used for sending an alarm signal according to the detection result of the state detection unit. According to the load fuse detection device and the power source system, by arranging the state detection unit and the auxiliary power source, the compatibility of the load fuse detection device is improved, and the use efficiency of the power source system is improved.

Classes IPC  ?

• H01H 85/30 - Moyens pour indiquer l'état du fusible structurellement associés au fusible

Abrégé

The present invention relates to an isolated driving circuit comprising an isolated driving transformer, a double-end excitation signal driving and controlling circuit and a pulse-driving signal conversion circuit, wherein the double-end excitation signal driving and controlling circuit is used for generating a first pulse driving signal and a second pulse driving signal; and the pulse-driving signal conversion circuit is used for converting an output signal of a secondary winding into a driving signal which is used for driving a corresponding power switching tube. The isolated driving circuit provided by the present invention can avoid resonance oscillation caused by the magnetic inductances of a blocking capacitor and a driver transformer.

Classes IPC  ?

• H02M 1/088 - Circuits spécialement adaptés à la production d'une tension de commande pour les dispositifs à semi-conducteurs incorporés dans des convertisseurs statiques pour la commande simultanée de dispositifs à semi-conducteurs connectés en série ou en parallèle

Abrégé

A battery charging and discharging device and a battery charging and discharging system. The battery charging and discharging system comprises a charging power supply, at least two battery charging and discharging devices which are connected to each other in parallel, a feedback device and a reference output device. The battery charging and discharging device and the battery charging and discharging system can automatically control the charging and discharging current, and increase the utilization rate of equipment.

Classes IPC  ?

• H01M 10/44 - Méthodes pour charger ou décharger
• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries