UPS
The present invention relates to a kind of UPS, particularly relate to a kind of UPS that regulated output voltage is provided.
Existing interactive UPS (line-interactive uninterruptiblepower supplies) mainly comprises a transformer (transformer) 2, an inverter (inverter) 3, a switches set and a storage battery 5 as shown in Figure 1.The operating mode of this device can be subdivided into 3 kinds of patterns according to the difference of a civil power 1 voltage height:
(1) one civil power normal mode: when this civil power 1 voltage in this device institute tolerance scope, then this civil power 1 voltage directly is electrically connected to an output 6 by one first switch 41.
(2) one voltage stabilizing patterns: when this civil power 1 voltage surpasses this device institute tolerance value, but the scope that no show still need be isolated, then this device is by a plurality of tappings (212,213 and 214) of a level winding 21 of a second switch 42 these transformers 2 of selection electrical connection and the tapping 211 that this first switch 41 is electrically connected these secondary winding 21.This tapping (212,213 and 214) is to represent many groups of default different coil ratios respectively.By the selection of this transformer coil turn ratio, can adjust this device output voltage values to desired scope.
(3) battery discharge pattern: when this civil power 1 interrupts or its magnitude of voltage exceeds a default line voltage height (low) limit of (being lower than) device, this moment, this civil power 1 will be cut off, also promptly a live wire end of this civil power 1 (L end) and ground terminal (N end) cut off with this transformer 2, and this first switch 41 is electrically connected with this output 6, these output 6 voltages utilize this inverter 3 to carry out voltage transformation by 22 pairs one primary coils of a level coil 23 of this transformer 2, and this output 6 is carried out voltage stabilizing, required electric energy is then provided by this storage battery 5.
From the above, the voltage stabilizing pattern of traditional interactive UPS is to utilize the both sides turn ratio change of this transformer to carry out this output voltage adjustment function, and it belongs to the mechanical type voltage stabilizing on characteristic; Yet this method will cause following shortcoming:
(1) because the buck turn ratio that can preset of transformer both sides makes up limitedly, this type of UPS is only had a segmented voltage regulation result, so its output voltage values is wayward.
(2) because the circuit structure of such device, employed Transformer Winding needs with civil power L, N two inputs and connect in the device, so transformer need carry higher voltage and power, causes it bulky, the shortcoming that the total system power density is on the low side.
The invention reside in provides a kind of UPS, with the required use transformer of reduction UPS electrical ratings, and then reaches the purpose that improves the single unit system power density.
First purpose of the present invention is to provide a kind of UPS, provides a stable output voltage, and it comprises a first input end, one first output, an input switch device, an electric energy transducer and a transformer.This first input end is in order to be electrically connected with a civil power.This first output is in order to this stable output voltage to be provided.This input switch device is in order to be electrically connected this first input end and this civil power.This power supply energy storage device is the device as electrical power storage.This electric energy transducer is to be electrically connected this input switch device, when this line voltage just often, with the electrical power storage of this civil power on this power supply energy storage device; When this line voltage is unusual, with the electric energy conversion output of this power supply energy storage device.And, this transformer, comprise a primary coil, be to be electrically connected with an output of this electric energy transducer, and one first end of a level coil is to be electrically connected with this first output, as a variable voltage source, when this city electrical anomaly, one voltage is provided, stablizes this output voltage of this UPS.
According to above-mentioned conception, wherein this first input end comprises a live wire end (L end) and a ground terminal (N end).
According to above-mentioned conception, wherein this UPS is to be interactive uninterruptible power supply provider.
According to above-mentioned conception, wherein this input switch device is an input electromagnetic switch.
According to above-mentioned conception, wherein this power supply energy storage device is a storage battery.
According to above-mentioned conception, wherein also comprise a transformer coil selector switch, be one first end and one second end, one second end of this secondary coil and a connection status of this input switch device of selecting this primary coil of this transformer.
According to above-mentioned conception, wherein this electric energy transducer comprises: a bridge rectifier is to be electrically connected this input switch device, and this civil power is carried out rectification, produces a direct current ripple; One electric capacity is to be a filter, is electrically connected this bridge rectifier, and this direct current ripple is carried out filtering, produces one first direct voltage; And an inverter, be to be electrically connected this electric capacity and this bridge rectifier, this first direct voltage is converted to one first alternating voltage.
According to above-mentioned conception, wherein an output of this inverter is this output of this electric energy transducer.
According to above-mentioned conception, wherein this first end of this primary coil of this transformer is to be electrically connected with this output of this inverter with second end.
According to above-mentioned conception, wherein this first end of this secondary coil of this transformer is to be electrically connected with this live wire end of this first output.
According to above-mentioned conception, wherein this transformer coil selector switch comprises: one first switch is in order to this live wire end that is electrically connected this input switch device and a live wire end of this first output; One second switch is in order to this live wire end of being electrically connected this input switch device and this second end of this secondary coil; One the 3rd switch is in order to this first end of being electrically connected this secondary coil and this first end of this primary coil; And one the 4th switch, be in order to this second end that is electrically connected this primary coil and a ground terminal of this first output.
According to above-mentioned conception, wherein this transformer coil selector switch is that a transformer coil is selected electromagnetic switch.
According to above-mentioned conception, wherein this connection status of this transformer coil selector switch is to comprise a civil power normal condition, a voltage stabilizing state, and a civil power interrupt status.
According to above-mentioned conception, in this civil power normal condition, be to make this input switch device conducting wherein, and this first switch conduction, this second switch, the 3rd switch and the 4th not conducting of switch.
According to above-mentioned conception, wherein to comprise a civil power be that a high-voltage state and a civil power are low-voltage state to this voltage stabilizing state.
According to above-mentioned conception, wherein this civil power is a low-voltage state, be to make this input switch device conducting, and this second switch conducting, this first switch, the 3rd switch and the 4th not conducting of switch.
According to above-mentioned conception, wherein this civil power is a high-voltage state, be to make this input switch device conducting, and the 3rd switch and the 4th switch conduction, this first switch and this not conducting of second switch.
According to above-mentioned conception, wherein this civil power interrupt status is to make this not conducting of input switch device, and the 3rd switch and the 4th switch conduction, this first switch and this not conducting of second switch.
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is described in further detail.
Fig. 1 is the circuit diagram of known uninterruptible power supply (UPS) device;
When Fig. 2 is the civil power normal condition, the circuit diagram of preferred embodiment UPS of the present invention;
Fig. 3 is a civil power when being low-voltage state, the circuit diagram of preferred embodiment UPS of the present invention;
Fig. 4 is a civil power when being high-voltage state, the circuit diagram of preferred embodiment UPS of the present invention;
When Fig. 5 is the civil power interrupt status, the circuit diagram of preferred embodiment UPS of the present invention.
With reference to Fig. 2~Fig. 5, it is for the circuit diagram of preferred embodiment UPS of the present invention.As Fig. 2~shown in Figure 5, this UPS provides a stable output voltage, and it comprises a first input end 7, one first output 8, an input switch device 9, a power supply energy storage device 10, an electric energy transducer 11 and a transformer 12.This first input end 7 is in order to be electrically connected with a civil power 14.This first output 8 is in order to this stable output voltage to be provided.This input switch device 9 is to be electrically connected this first input end 7 and this civil power 14.This power supply energy storage device 10 is the devices as electrical power storage.This electric energy transducer 11 is to be electrically connected this input switch device 9, when these civil power 14 voltages just often, with the electrical power storage of this civil power 14 on this power supply energy storage device 10 and this first output, 8 normal civil power 14 voltages are provided; When these civil power 14 electric voltage exceptions, provide this first output 8 stable voltage the electric energy of this power supply energy storage device 10 conversion output.And this transformer 12 comprises a primary coil 121, be to be electrically connected with an output of this electric energy transducer 11, and one first end 1221 of a level coil 122 is to be electrically connected with this first output, as a variable voltage source, when this civil power 14 is unusual, one voltage is provided, stablizes this output voltage of this UPS.
In addition, this first input end 7 comprises a live wire end (L end) and a ground terminal (N end).This input switch device 9 is an input electromagnetic switch.This power supply energy storage device 10 is a storage battery.
This UPS also comprises a transformer coil selector switch 13, is one first end 1211 and one second end 1212, one second end 1222 of this secondary coil 122 and a connection status of this input switch device 9 of selecting this primary coil 121 of this transformer 12.
Yet this electric energy transducer 11 comprises a bridge rectifier 111, an electric capacity 112 and an inverter 113.This bridge rectifier 111 is to be electrically connected this input switch device 9, and this civil power 14 is carried out rectification, produces a direct current ripple.This electric capacity 112 is to be a filter, is electrically connected this bridge rectifier 111, and this direct current ripple is carried out filtering, produces one first direct voltage.And this inverter 113 is to be electrically connected this electric capacity 112 and this bridge rectifier 111, and this first direct voltage is converted to one first alternating voltage.One output of this inverter 113 is this output of this electric energy transducer 11.
And this first end 1211 of this primary coil 121 of this transformer 12 is to be electrically connected with this output of this inverter 113 with second end 1212.This first end 1221 of this secondary coil 122 of this transformer 12 is to be electrically connected with this live wire end of this first output 8.This transformer coil selector switch 13 comprises one first switch S 1, a second switch S2, one the 3rd switch S 3 and one the 4th switch S 4.This first switch S 1 is in order to be electrically connected a live wire end of this this input switch device 9 and this first output 8.This second switch S2 is in order to be electrically connected this second end 1222 of this this input switch device 9 and this secondary coil 122.The 3rd switch S 3 is in order to this first end 1221 that is electrically connected this secondary coil 122 and this first end 1211 of this primary coil 121.And the 4th switch S 4 is in order to this second end 1212 that is electrically connected this primary coil 121 and a ground terminal of this first output 8.And this transformer coil selector switch is that a transformer coil is selected electromagnetic switch.
With reference to Fig. 2, when it is the civil power normal condition, the circuit diagram of preferred embodiment UPS of the present invention.In this civil power normal condition, be to make this input switch device 9 conductings, and this first switch S, 1 conducting, but this second switch S2, the 3rd switch S 3 and the 4 not conductings of the 4th switch S.
With reference to Fig. 3, it is a civil power when being low-voltage state, the circuit diagram of preferred embodiment UPS of the present invention.When this civil power is low-voltage state, be to make this input switch device 9 conductings, and this second switch S2 conducting, but this first switch S 1, the 3rd switch S 3 and the 4 not conductings of the 4th switch S.
With reference to Fig. 4, it is a civil power when being high-voltage state, the circuit diagram of preferred embodiment UPS of the present invention.At this civil power is high-voltage state, be to make this input switch device 9 conductings, and the 3rd switch S 3 and 4 conductings of the 4th switch S, but this first switch S 1 and not conducting of this second switch S2.
With reference to Fig. 5, when it is the civil power interrupt status, the circuit diagram of preferred embodiment UPS of the present invention.In this civil power interrupt status, be to make this input switch device 9 not conductings, and the 3rd switch S 3 and 4 conductings of the 4th switch S, but this first switch S 1 and not conducting of this second switch S2.
Comprehensively above-mentioned, the present invention can provide a kind of UPS, with the required use transformer of reduction UPS electrical ratings, and then reaches the purpose that improves the single unit system power density.
The present invention can be thought and is to modify as all by the personage Ren Shi craftsman who knows this technology, but does not all break away from the protection range of claim.