초록 ▼

The invention relates to uninterruptible power supply devices which make it possible to supply emergency power to a load, which is to be supplied, in the event of mains failure. The invention is based on the object of providing a device for supplying uninterruptible power, which device can be operat

The invention relates to uninterruptible power supply devices which make it possible to supply emergency power to a load, which is to be supplied, in the event of mains failure. The invention is based on the object of providing a device for supplying uninterruptible power, which device can be operated in a more energy-saving manner and in which the emergency power can be controlled in a rapid and safe manner. To this end, the uninterruptible power supply device has a power transistor which can be rapidly switched and can be used to connect a standby power source to the output connections during emergency power operation. The output current can also be dynamically limited by driving the power transistor, which can be rapidly switched, in a corresponding manner. In addition, the input and output of the UPS device are decoupled using a field effect transistor that acts as a power transistor.

대표청구항 ▼

What is claimed is: 1. A device for supplying uninterruptible power, said device comprising:input connections for connection to a primary DC voltage supply device;standby-power connections for connecting a standby power source;first-output connections for connecting a load;a device for decoupling th

What is claimed is: 1. A device for supplying uninterruptible power, said device comprising:input connections for connection to a primary DC voltage supply device;standby-power connections for connecting a standby power source;first-output connections for connecting a load;a device for decoupling the input connections from the first-output connections in the event of a fault in the primary DC voltage supply device;a first controllable switching device for connecting the standby power source to the first-output connections in a controlled manner in the event of a fault in the primary DC voltage supply device; anda control and monitoring device having a control part that is assigned to the first controllable switching device;characterized in thatthe device for decoupling comprises a diode that has i) an anode connection that is directly electrically connected to one of the input connections and ii) a cathode connection that is directly electrically connected to one of the first-output connections,the first controllable switching device has a first power transistor having a gate, a drain and a source terminal,the control and monitoring device i) also has a monitoring part that is provided for monitoring the output current flowing through the first power transistor, and ii) is directly electrically connected to the source terminal of the first power transistor, andthe control part is directly electrically connected to the gate terminal of the first power transistor and is designed to pulse-width-modulate the first power transistor on the basis of the current being monitored in order to limit the current which can be provided by the standby power source.