Abstract

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.

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
• H01H 13/46 - Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs two separate blade springs forming a toggle

Abstract

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.

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over

Abstract

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.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02H 7/18 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteriesEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for accumulators

Abstract

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.

IPC Classes  ?

• H01H 85/30 - Means for indicating condition of fuse structurally associated with the fuse

Abstract

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.

IPC Classes  ?

• H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices

Abstract

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.

IPC Classes  ?

• H01M 10/44 - Methods for charging or discharging
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries