TWM461247U - Uninterruptable power supply system - Google Patents

Description

Uninterruptible power supply

The present invention is to provide an uninterruptible power supply, especially a high-power uninterruptible power supply.

In recent years, power technology has developed rapidly. Uninterrupted power supplies can continuously supply power to the load. When the load requires more and more high-power power, it needs to provide a large power supply through the constant power supply. Give the load.

However, if the uninterruptible power supply is implemented using a single converter, the following problems exist, such as the existing switching unit cannot withstand a large current; or the uninterruptible power supply needs to store a large amount of electric energy. In order to make the continuous power supply become bulky, heavier, higher cost and less reliable; or large current will cause loss of electrical components such as switch units, ripple, or electromagnetic interference (EMI) and other issues.

The present invention is to provide an uninterruptible power supply to solve the above problems.

The present invention proposes an uninterruptible power supply, comprising a rectifier circuit, an interleaved conversion circuit and an inverter conversion circuit. The interleaved conversion circuit is coupled to the rectification circuit. The interleaved conversion circuit includes a first conversion circuit, a second conversion circuit, a driving unit and a first capacitor. The first conversion circuit has a first switching unit. The second conversion circuit has a second switching unit. The driving unit is coupled to the first conversion circuit and the second conversion circuit. The first capacitor is coupled to the first conversion circuit and the second conversion circuit. The inverter conversion circuit is coupled to the interleaved conversion circuit. Wherein, the driving unit outputs a first message No. to control the first switching unit to be turned on or off, and the driving unit outputs a second signal to control the second switching unit to be turned on or off, so that the first capacitor establishes a voltage to supply power to the inverter conversion circuit.

In an embodiment of the present invention, the first conversion circuit further includes a first inductor and a first diode, and the first inductor is coupled to the rectifier circuit, the first switch unit, and the anode of the first diode, first The cathode of the diode is coupled to the first capacitor.

In an embodiment of the present invention, the second conversion circuit further includes a second inductor and a second diode, the second inductor is coupled to the rectifier circuit, the second switch unit and the anode of the second diode, and the second The cathode of the diode is coupled to the first capacitor.

In an embodiment of the present invention, the interleaved conversion circuit further includes a third diode, the cathode of the third diode is coupled to the first switch unit and the second switch unit, and the anode of the third diode is coupled. The first capacitor.

In an embodiment of the present invention, the rectifying circuit is coupled to the mains to rectify and output an input current to the interleaved converting circuit, and the input current is shunted into a first current and a second current, and the first current flows into the first converting circuit. The second current flows into the second conversion circuit.

In an embodiment of the present invention, when the first switching unit is turned on, the first current flows through the first switching unit, when the first switching unit is turned off, the first current flows to the first capacitor, and when the second switching unit is turned on, The second current flows through the second switching unit, and when the second switching unit is turned off, the second current flows to the first capacitor.

In an embodiment of the present invention, the uninterruptible power supply further includes a set of output switches, an LC circuit and a relay switch. The set of output switches is coupled between the inverter conversion circuit and a load. The set of output switches includes a first output switch and a second output switch. The LC circuit is coupled between the first output switch, an output water line end and an output ground terminal. The relay switch is coupled between an input water line terminal and the LC circuit.

In an embodiment of the present invention, the uninterruptible power supply further includes a first electromagnetic interference filter circuit and a second electromagnetic interference filter circuit, wherein the first electromagnetic interference filter circuit is coupled to the rectifier circuit, an input fire terminal, and an input. Water line end and an input ground line Between the ends, the second electromagnetic interference filter circuit is coupled between the inverter conversion circuit, an output hot line end, an output water line end and an output ground line end.

In an embodiment of the present invention, the uninterruptible power supply further includes a relay unit coupled between the rectifier circuit and the first electromagnetic interference filter circuit.

In an embodiment of the present invention, the uninterruptible power supply further includes a phase lock control circuit coupled to the relay switch, and the phase lock control is performed when the output phase of the uninterruptible power supply is the same as the input phase of the mains. The circuit controls the conduction of the relay switch such that the input water line end is connected to the output water line end through the LC circuit.

The continual power supply of the present invention transmits the input current to the first and second currents through the interleaved conversion circuit, and the first and second currents are respectively stored in the first and second conversion circuits, or A capacitor is charged to cause the first capacitor to establish a voltage to supply power to the inverter conversion circuit, and the first and second switching units can receive a smaller current, and the smaller current will be the first and second switching units Such as the loss of electrical components becomes smaller, the ripple becomes smaller, or electromagnetic interference (EMI) is reduced. In addition, the uninterruptible power supply will become smaller, lighter, lower cost and more reliable, thereby improving the ease of use of the uninterruptible power supply.

The above description of the present invention and the following description of the embodiments are provided to illustrate and explain the principles of the present invention, and to provide further explanation of the scope of the patent application of the present invention.

1, 1a, 1b‧‧‧ Uninterruptible power supply

10, 10a, 10b‧‧‧ rectifier circuit

12, 12a, 12b‧‧‧ Interleaved conversion circuit

120, 120a, 120b‧‧‧ drive unit

121, 121a, 121b‧‧‧ first conversion circuit

1211, 1211a, 1211b‧‧‧ first switch unit

16a, 16b‧‧‧LC circuit

LF3‧‧‧Inductance

C1‧‧‧ capacitor

18a, 18b‧‧‧ Relay switch

19a‧‧‧ phase lock control circuit

S1‧‧‧ first output switch

122, 122a, 122b‧‧‧ second conversion circuit

1222, 1222a, 1222b‧‧‧ second switching unit

124, 124a, 124b‧‧‧ first capacitor

LF1‧‧‧first inductor

LF2‧‧‧second inductance

D1‧‧‧First Diode

D2‧‧‧ second diode

D3‧‧‧ third diode

14, 14a, 14b‧‧‧Inverter conversion circuit

141b‧‧‧First switch circuit

142b‧‧‧Second switch circuit

143b‧‧‧inductor circuit

Q1‧‧‧First switching element

Q2‧‧‧Second switching element

Q3‧‧‧ Third switching element

Q4‧‧‧fourth switching element

Co‧‧‧ output capacitor

24a, 24b‧‧‧ relay unit

S10‧‧‧First common end

S11‧‧‧ first switch end

S12‧‧‧Second switching end

S2‧‧‧second output switch

S20‧‧‧ second common end

S21‧‧‧ third switching end

S22‧‧‧ fourth switching end

L1‧‧‧ input firewire end

L2‧‧‧ output firewire end

N1‧‧‧ input water line end

N2‧‧‧ output water line end

E1‧‧‧ input ground terminal

E2‧‧‧ output ground end

20a, 20b‧‧‧ first electromagnetic interference filter circuit

22a, 22b‧‧‧second electromagnetic interference filter circuit

Iin‧‧‧ input current

I1‧‧‧First current

I2‧‧‧second current

Is‧‧‧Synthesis current

FIG. 1 is a functional block diagram of an uninterruptible power supply according to an embodiment of the present invention.

2 is a current waveform diagram of an uninterruptible power supply according to another embodiment of the present invention.

FIG. 3 is a functional block diagram of an uninterruptible power supply according to another embodiment of the present invention.

4 is a circuit diagram of an uninterruptible power supply according to another embodiment of the present creation of FIG.

FIG. 1 is a functional block diagram of an uninterruptible power supply according to an embodiment of the present invention. Please refer to Figure 1. An uninterruptible power supply 1 includes a rectifier circuit 10, an interleaved conversion circuit 12 and an inverter conversion circuit 14. In practice, the uninterruptible power supply 1 is, for example, an uninterruptible power supply of 6 KVA to 10 KVA, and this embodiment does not limit the aspect of the uninterruptible power supply 1. The present invention receives the commercial power through the rectifying circuit 10 to rectify and output an input current Iin to the interleaved conversion circuit 12, and the interleaved conversion circuit 12 can shunt the input current Iin for power distribution operation, so the interleaved conversion circuit 12 can be reduced. Power loss to provide a DC voltage to the inverter conversion circuit 14.

The rectifier circuit 10 is coupled between the mains and the interleaved converter circuit 12, and the rectifier circuit 10 is, for example, a full bridge circuit. In practice, the rectifier circuit 10 is, for example, an AC/DC power supply rectifier circuit or a full-wave rectifier circuit to rectify a commercially available waveform such as an AC power source into an input power source or an input current Iin for the load, the input power source or input. The current Iin is a full-wave pulsating DC. It is worth noting that the rectifier circuit 10 is not limited thereto, and may be a half-wave rectifier circuit.

The inverter conversion circuit 14 is coupled to the interleaved conversion circuit 12. In practice, the inverter conversion circuit 14 is, for example, an inverter for converting direct current into a standard and stable alternating current, and the inverter conversion circuit 14 transmits an output voltage to the load through an output switch (not shown). Thereby, the output voltage of the inverter conversion circuit 14 is substantially the same as the load voltage.

The interleaved conversion circuit 12 is coupled between the rectification circuit 10 and the inverter conversion circuit 14. The interleave conversion circuit 12 includes a first conversion circuit 121, a second conversion circuit 122, a driving unit 120 and a first capacitor 124. In practice, the interleaved conversion circuit 12 is, for example, an interleaved power correction conversion circuit. Of course, the interleaved conversion circuit 12 can be used as a power factor correction, for example, to make the power factor approach to 1 to improve the efficiency of power conversion. The technical field has the usual knowledge to be freely designed as needed.

The first conversion circuit 121 has a first switching unit 1211, and the second conversion circuit 122 has a second switching unit 1222. The first conversion circuit 121 is connected in parallel with the second conversion circuit 122. In practice, the first and second conversion circuits 121 and 122 are, for example, boost circuits. The first embodiment of the present invention does not limit the first and second conversion circuits 121 and 122. The switching units 1211, 1222 are, for example, dual-loaded junction transistors, power transistors or field effect transistors. This embodiment does not limit the aspects of the first and second switching units 1211, 1222.

The driving unit 120 is coupled to the first switching unit 1211 and the second switching unit 1222. The driving unit 120 is configured to control the turning on and off of the first and second switching units 1211 and 1222, and the driving unit 120 controls the wafer or the switching control, for example. The chip is implemented. For example, the driving unit 120 is a CS3845 chip for controlling the on and off of the first switching unit 1211 or controlling the turning on and off of the second switching unit 1222. This embodiment does not limit the aspect of the driving unit 120.

In addition, the driving unit 120 of the present invention is coupled to the control ends of the first and second switching units 1211, 1222, such as a gate or a base, whereby the driving unit 120 drives the first and second in an isolated manner. The switching units 1211, 1222 are turned on or off. This embodiment does not limit the driving unit 120 to drive the first and second switching units 1211, 1222.

The first capacitor 124 is coupled between the first conversion circuit 121 , the second conversion circuit 122 , and the inverter conversion circuit 14 . In practice, the first capacitor 124 is used to store electrical energy to provide a DC voltage to the inverter conversion circuit 14, for example, the first or second conversion circuits 121, 122 charge the first capacitor 124, or the first capacitor 124 is reversed. The conversion circuit 14 is discharged, and the embodiment does not limit the state in which the first capacitor 124 is charged or discharged.

In detail, the rectifier circuit 10 is coupled to the mains to rectify the output of an input current Iin to the interleaved converter circuit 12, and the input current Iin is shunted into a first current I1 and a second current I2, and the first current I1 flows into the first conversion. The circuit 121, the second current I2 flows into the second conversion circuit 122, wherein the driving unit 120 outputs a first signal to control the first switching unit 1211 to be turned on or off, and the driving unit 120 outputs a second signal. The second switching unit 1222 is controlled to be turned on or off to cause the first capacitor 124 to establish a voltage to supply power to the inverter conversion circuit 14.

For example, the driving unit 120 controls the first switching unit 1211 to be turned on, the first current I1 is stored in the first converting circuit 121, the driving unit 120 controls the first switching unit 1211 to be turned off, and the first current I1 flows through the first converting circuit 121. To charge the first capacitor 124, the driving unit 120 controls the second switching unit 1222 to be turned on, the second current I2 is stored in the second switching circuit 122, and the driving unit 120 controls the second switching unit 1222 to be turned off. Current I2 flows through second conversion circuit 122 to charge first capacitor 124.

It is worth mentioning that the first signal and the second signal are phase complementary locking signals. In practice, the first signal is, for example, a signal that causes the first switching unit 1211 to be turned on or off according to the phase angle of the input current Iin or the first current I1, and the second signal is also, for example, based on the input current Iin or the second. The phase angle of the current I2 causes the second switching unit 1222 to generate a signal that is turned on or off, wherein the phase angle of the first signal according to the input current Iin is different from the phase angle of the input signal Iin according to the second signal, thereby thereby And the second signal is an alternating signal that produces phase complementation. This embodiment does not limit the aspect of the first signal and the second signal.

For example, when the phase angle of the input current Iin is 0 or 180 degrees, the driving unit 120 controls the first switching unit 1211 to be turned on, and when the phase angle of the input current Iin is 90 or 270 degrees, the driving unit 120 controls the first switch. The unit 1211 is turned off. When the phase angle of the input current Iin is 45 or 225 degrees, the driving unit 120 controls the second switching unit 1222 to be turned on. When the phase angle of the input current Iin is 135 or 315 degrees, the driving unit 120 controls the second switch. The unit 1222 is turned off, whereby the driving unit 120 outputs the first or second signal to control the first or second switching units 1211, 1222 to be turned on or off, and the first and second signals generate mutually complementary alternating signals.

Therefore, the present invention shares the partial power by the parallel first and second conversion circuits 121 and 122 through the interleaved conversion circuit 12, thereby reducing the power loss of the first and second conversion circuits 121 and 122, for example, reducing First and second switching units 1211 1222 electrical and thermal stress, thereby improving the stability of the system. Further, the currents of the respective units of the first and second conversion circuits 121, 122 are small, so that the volume of the magnetic element is also reduced, thereby reducing the volume and weight of the uninterruptible power supply 1.

2 is a current waveform diagram of the uninterruptible power supply 1 according to another embodiment of the present invention. Please refer to Figure 2 and Figure 1. 2 is a waveform diagram of currents of the first and second currents I1, I2, and a waveform of the first and second currents I1, I2 synthesized into a combined current Is.

For example, when the phase angle of the input current Iin is 0 degrees, the driving unit 120 controls the first switching unit 1211 to be turned on, so that the first current I1 is stored in the first conversion circuit 121 when the phase angle of the input current Iin is At 45 degrees, the driving unit 120 controls the second switching unit 1222 to be turned on to store the second current I2 in the second conversion circuit 122. When the phase angle of the input current Iin is 90 degrees, the driving unit 120 controls the first switching unit. 1211 is turned off to cause the first current I1 to flow through the first conversion circuit 121 to charge the first capacitor 124. When the phase angle of the input current Iin is 135 degrees, the driving unit 120 controls the second switching unit 1222 to be turned off, so that The second current I2 flows through the second conversion circuit 122 to charge the first capacitor 124, whereby the first capacitor 124 establishes a voltage to supply power to the inverter conversion circuit 14.

Similarly, when the phase angle of the input current Iin is 180 degrees, the driving unit 120 controls the first switching unit 1211 to be turned on, so that the first current I1 is stored in the first conversion circuit 121, and the phase angle of the input current Iin is At 225 degrees, the driving unit 120 controls the second switching unit 1222 to be turned on to store the second current I2 in the second conversion circuit 122. When the phase angle of the input current Iin is 270 degrees, the driving unit 120 controls the first switching unit. 1211 is turned off, so that the first current I1 flows through the first conversion circuit 121 to charge the first capacitor 124. When the phase angle of the input current Iin is 315 degrees, the driving unit 120 controls the second switching unit 1222 to be turned off, so that The second current I2 flows through the second conversion circuit 122 to charge the first capacitor 124, whereby the first capacitor 124 establishes a voltage to supply power to the inverter conversion circuit 14, wherein the first and second currents I1, I2 waveform And the resultant current Is waveform is shown in Figure 2. This embodiment does not limit the waveforms of the first and second currents I1, I2 and the combined current Is.

It can be seen from the first and second currents I1 and I2 and the combined current Is of FIG. 2 that the ripple of the combined current Is is greatly reduced and the current waveform becomes continuous, wherein the average of the first current I1 and the second current I2 forms a combined current. Is, and the combined current Is exhibits, for example, a sine wave, so the interleaved conversion circuit 12 also has a higher power factor, and when the current peak reference signals of the first and second conversion circuits 121, 122 are equal, the interleaved conversion circuit 12 will also automatically achieve current sharing such that the first current I1 is substantially equal to the second current I2.

In addition, the first and second switching units 1211, 1222 can receive a small current, and the smaller current will cause the loss of the electrical components such as the first and second switching units 1211, 1222 to become smaller, and the ripple becomes smaller. Or reduce the electromagnetic interference (EMI) and other problems, because the ripple of the combined current Is is reduced, and the ripple frequency is twice the frequency of the switching unit, thereby reducing the high-frequency harmonic content of the current, simplifying the EMI filter design. Further, the volume of the uninterruptible power supply 1 becomes smaller, the weight becomes lighter, the cost is lowered, and the reliability is improved, thereby improving the usability of the uninterruptible power supply 1.

FIG. 3 is a functional block diagram of an uninterruptible power supply according to another embodiment of the present invention. Please refer to Figure 3. This embodiment is similar to the uninterruptible power supply 1a, 1 of the foregoing embodiment. For example, the uninterruptible power supply 1a can also pass through the interleaved conversion circuit 12a to cause the first and second conversion circuits 121a, 122a to store electrical energy. Or charging the first capacitor 124a, thereby causing the first capacitor 124a to establish a voltage supply to the inverter conversion circuit 14a. However, there is still a difference between the uninterruptible power supply 1a and 1 , which is: an uninterruptible power supply The device 1a further includes a first electromagnetic interference filter circuit 20a, a second electromagnetic interference filter circuit 22a, a relay unit 24a, a set of output switches S1, S2, an LC circuit 16a and a relay switch 18a.

The first electromagnetic interference filter circuit 20a is coupled to the interleaved conversion circuit 12a, and the input fire Between the line end L1, the input water line end N1 and an input ground line end E1, the second electromagnetic interference filter circuit 22a is coupled to the inverter conversion circuit 14a, the output line end L2, the output water line end N2 and the output ground line end E2. between. This embodiment does not limit the aspect of the uninterruptible power supply 1a.

In detail, the electromagnetic interference filter circuit can suppress electromagnetic noise of the alternating voltage. Therefore, the first electromagnetic interference filter circuit 20a is used as electromagnetic interference filtering of a commercial power source such as an alternating current power source, and the second electromagnetic interference is used. The filter circuit 22a is used as an electromagnetic interference filter such as an output voltage of an alternating current, whereby the present invention satisfies the electromagnetic interference specification through the first and second electromagnetic interference filter circuits 20a, 22a.

The relay unit 24a is coupled between the rectifier circuit 10a and the first electromagnetic interference filter circuit 20a. In practice, the relay unit 24a is, for example, an electromagnetic, inductive, electric or electronic relay, and the embodiment does not limit the aspect of the relay unit 24a. For example, when the state of the relay unit 24a is ON, the relay unit 24a is turned on, so that the rectifier circuit 10a, the interleave conversion circuit 12a, the inverter conversion circuit 14a, and the load terminal circuit are in a closed loop state, thereby continuously The electric power supply 1a supplies power to the load through the mains supply. When the state of the relay unit 24a is OFF, the relay unit 24a is not turned on, so that the rectifier circuit 10a, the interleave conversion circuit 12a, the inverter conversion circuit 14a, and the load terminal circuit form an open state, thereby continuously supplying power. The device 1a supplies power to the load through a battery module (not shown).

A set of output switches S1, S2 is coupled between the inverter conversion circuit 14a and a load. The set of output switches S1, S2 includes a first output switch S1 and a second output switch S2. In practice, the first output switch S1 has a first common terminal S10, a first switching terminal S11 and a second switching terminal S12, and the second output switch S2 has a second sharing terminal S20 and a third switching terminal. S21 and a fourth switching terminal S22, wherein the first common terminal S10 is coupled to the output water terminal N2, the second common terminal S20 is coupled to the output fire terminal L2, and the first switching terminal S11 is coupled to the third switching terminal S21. a bypass circuit (Bypass), and the second switching end S12 and the fourth switching end S22 are coupled to the inverter conversion circuit 14a, when not When the power-off power supply 1a forms an overload phenomenon or a fault, the first and second output switches S1, S2 can be coupled to the bypass circuit, whereby the uninterruptible power supply 1a can still provide an output voltage to the load. The field has the usual knowledge to be freely designed as needed.

In addition, the LC circuit 16a is coupled between an output water line terminal N2, an output ground terminal E2 and the first output switch S1. In practice, the LC circuit 16a includes an inductor LF3 and a capacitor C1. The inductor LF3 is coupled between the relay switch 18a and the capacitor C1. The capacitor C1 is coupled between the output water terminal N2 and the output ground terminal E2. Further, the capacitor C1 and the inductor LF3 are used for filtering or filtering out noise. For example, when the utility power is cut off, the voltage of the battery module is converted into a DC voltage required by the inverter conversion circuit 14a, and then the inverter conversion circuit 14a is used. It is converted into an alternating current to the load, wherein the capacitor C1 in the LC circuit 16a can store electrical energy and is used as a dummy load at the moment of the mains power-off, thereby protecting the load.

In detail, the present invention increases the design of the LC circuit 16a to reduce the voltage level of the output water terminal N2 and the output ground terminal E2 of the uninterruptible power supply 1a, for example, the output water terminal N2 and the output ground. The voltage level of the terminal E2 meets the application requirements of the load device, and the design of the isolation transformer is not required in the present invention, and the cost of the isolation transformer and the overall efficiency of the constant power supply 1a can be saved.

The relay switch 18a is coupled between the input water line terminal N1 and the LC circuit 16a. The relay switch 18a is, for example, an electromagnetic, inductive, electric or electronic relay, and the embodiment does not limit the aspect of the relay switch 18a. In practice, the relay switch 18a is used to control whether the input water terminal N1 is connected to the output water terminal N2. When the relay switch 18a is turned on, the input water terminal N1 is connected to the output water terminal N2 through the LC circuit 16a, so that The input water line end N1 and the output water line end N2 form a common water line state, whereby the input water line end N1, the output water line end N2 and the output ground end E2 maintain a certain low potential to meet a specific application. The need for equipment, in addition, this creation also reduces the chance of users getting an electric shock.

The phase lock control circuit 19a is coupled to the relay switch 18a. When the output phase of the uninterruptible power supply 1a is the same as the input phase of the mains, the phase lock control circuit 19a is used to control the conduction of the relay switch 18a to enable the input water. Line terminal N1 through the LC circuit 16a is connected to the output water terminal N2. In practice, the phase lock control circuit 19a transmits a phase lock control technique to control the on or off of the relay switch 18a. For example, the phase lock control circuit 19a detects the line according to the correctness of the wiring of the mains. Fault detector) to detect the input phase of the mains, thereby making the output phase of the uninterruptible power supply 1a the same as the input phase of the mains.

It should be noted that in other embodiments, the phase lock control circuit 19a can also be implemented by a firmware or a control program, such as the relay switch 18a and the phase lock control circuit 19a, and can be formed with a phase lock control program or firmware. The relay is turned on or off according to the input phase and the output phase. When the input phase and the output phase are in the same phase, the relay is turned on for phase locking. This embodiment does not limit the aspect of the phase lock control circuit 19a. In addition to the above differences, those skilled in the art should be able to easily infer from the foregoing embodiments and the above differences, and therefore will not be described herein.

Next, the detailed structure of the uninterruptible power supply and its operation will be further explained. 4 is a circuit diagram of an uninterruptible power supply according to another embodiment of the present creation of FIG. Please refer to Figure 4. The present interleaved conversion circuit 12b further includes a third diode D3. The cathode of the third diode D3 is coupled to the first switching unit 1211b and the second switching unit 1222b, and the anode of the third diode D3 is coupled. a capacitor 124b, wherein the third diode D3 limits the direction of current flow so that current flows from the anode of the third diode D3 to the cathode, whereby the third diode D3 can be used as the interleaved conversion circuit 12b and the inverse The electrically isolated operating element of the one-way blocking circuit of the conversion circuit 14b.

In detail, the first conversion circuit 121b further includes a first inductor LF1 and a first diode D1, and the first inductor LF1 is coupled to the rectifier circuit 10b, the first switching unit 1211b, and the anode of the first diode D1. The cathode of the first diode D1 is coupled to the first capacitor 124b. The second converter circuit 122b further includes a second inductor LF2 and a second diode D2. The second inductor LF2 is coupled to the rectifier circuit 10b, the second switch unit 1222b and the anode of the second diode D2, and the second diode The cathode of the body D2 is coupled to the first capacitor 124b.

In detail, when the first switching unit 1211b is turned on and the second switching unit 1222b is turned off, the first current I1 flows through the first inductor LF1 and the first switching unit 1211b, whereby the first current I1 is stored in the first inductor. LF1, the second current I2 flows through the second inductor LF2 and the second diode D2 to charge the first capacitor 124b, whereby the first capacitor 124b establishes a voltage supply to the inverter conversion circuit 14b.

When the first switching unit 1211b is turned on and the second switching unit 1222b is turned on, the first and second currents I1, I2 flow through the first and second inductors LF1, LF2 and the first and second switching units 1211b, 1222b, respectively. Thereby, the first and second currents I1, I2 are respectively stored in the first and second inductors LF1, LF2 to discharge the first capacitor 124b to the inverter conversion circuit 14b.

When the first switching unit 1211b is turned off and the second switching unit 1222b is turned on, the first current I1 flows through the first inductor LF1 and the first diode D1 to charge the first capacitor 124a, whereby the first capacitor 124a is established. The voltage is supplied to the inverter conversion circuit 14b, and the second current I2 flows through the second inductor LF2 and the second switching unit 1222b, whereby the second current I2 is stored in the second inductor LF2.

When the first switching unit 1211b is turned off and the second switching unit 1222b is turned off, the first and second currents I1, I2 flow through the first and second inductors LF1, LF2 and the first and second diodes D1, D2, respectively. The first capacitor 124b is charged, whereby the first capacitor 124b establishes a voltage supply to the inverter conversion circuit 14b. It is worth mentioning that the driving unit 120b controls the on and off of the first and second switching units 1211b, 1222b to enable the first and second switching circuits 121b, 122b to store or charge the first capacitor 124b. Those who have ordinary knowledge in the art can freely design as needed.

The inverter switching circuit 14b further includes a first switch circuit 141b, a second switch circuit 142b and an inductor circuit 143b. The first switch circuit 141b is connected to the second switch circuit 142b, and the output capacitor Co is coupled to the first switch circuit 141b. The second switching circuit 142b is connected to the output terminal Co. The output capacitor Co is also coupled to the second switching end S12 of the first output switch S1 and the fourth switching end S22 of the second output switch S2. In between, so that the inverter conversion circuit 14b is opened through the first output. S1 is coupled to the output water line terminal N2 and the LC circuit 16a in the common water line state, and the first switch circuit 141b includes a first switching element Q1 and a second switching element Q2, and the second switch circuit 142b includes a The third switching element Q3 and the fourth switching element Q4, wherein the first, second, third and fourth switching elements Q1, Q2, Q3, Q4 are turned on and off in the same operation as a general inverter , I will not repeat them here.

In summary, the creation is an uninterruptible power supply, and the uninterruptible power supply through the interleaved conversion circuit to split the input current into the first and second currents, and the drive unit controls the first and the second The second switch unit is turned on or off, and the first and second currents are respectively stored in the first and second conversion circuits, or the first capacitor is charged, so that the first capacitor establishes a voltage to supply power to the inverter conversion circuit, and The first and second switching units can receive a small current, and the smaller current will cause the loss of the electrical components such as the first and second switching units to become smaller, the ripple becomes smaller, or the electromagnetic interference (EMI) is reduced. . In addition, the uninterruptible power supply will become smaller, lighter, lower cost and more reliable, thereby improving the ease of use of the uninterruptible power supply. In this way, the continual power supply of the creation enhances the convenience of operation.

In summary, this creation has already met the requirements of the new patent and applied in accordance with the law. However, the above disclosures are only preferred embodiments of the present invention, and the scope of rights of the present invention cannot be limited thereto. Therefore, the equal changes or modifications made according to the scope of the application of the present application are still covered by the present application.

1‧‧‧Uninterruptible power supply

10‧‧‧Rectifier circuit

12‧‧‧Interleaved conversion circuit

120‧‧‧ drive unit

121‧‧‧First conversion circuit

1211‧‧‧First switch unit

122‧‧‧Second conversion circuit

1222‧‧‧Second switch unit

124‧‧‧first capacitor

14‧‧‧Inverter conversion circuit

Iin‧‧‧ input current

I1‧‧‧First current

I2‧‧‧second current

L1‧‧‧ input firewire end

L2‧‧‧ output firewire end

N1‧‧‧ input water line end

N2‧‧‧ output water line end

Claims (10)

An uninterruptible power supply device comprising: a rectifying circuit; an interleaved converting circuit coupled to the rectifying circuit, the interleaved converting circuit comprising: a first converting circuit having a first switching unit; and a second converting The circuit has a second switching unit; a driving unit coupled to the first converting circuit and the second converting circuit; a first capacitor coupled to the first converting circuit and the second converting circuit; and an inverter a conversion circuit coupled to the interleaved conversion circuit; wherein the driving unit outputs a first signal to control the first switching unit to be turned on or off, and the driving unit outputs a second signal to control the second switching unit to be turned on or The cutoff is such that the first capacitor establishes a voltage to supply power to the inverter conversion circuit. The uninterruptible power supply device of claim 1, wherein the first conversion circuit further includes a first inductor and a first diode, the first inductor being coupled to the rectifier circuit, the first The switch unit is coupled to the anode of the first diode, and the cathode of the first diode is coupled to the first capacitor. The uninterruptible power supply device of claim 1, wherein the second conversion circuit further includes a second inductor and a second diode, the second inductor being coupled to the rectifier circuit, the second The switch unit is coupled to the anode of the second diode, and the cathode of the second diode is coupled to the first capacitor. The uninterruptible power supply device of claim 1, wherein the interleaved conversion circuit further includes a third diode, and the cathode of the third diode is coupled to the first switch. The unit and the second switch unit, the anode of the third diode is coupled to the first capacitor. The uninterruptible power supply device of claim 1, wherein the rectifier circuit is coupled to the commercial power to rectify and output an input current to the interleaved conversion circuit, The input current is shunted into a first current and a second current, and the first current flows into the first conversion circuit, and the second current flows into the second conversion circuit. The uninterruptible power supply device of claim 5, wherein the first current flows through the first switching unit when the first switching unit is turned on, and the first current is when the first switching unit is turned off Flowing to the first capacitor, and when the second switching unit is turned on, the second current flows through the second switching unit, and when the second switching unit is turned off, the second current flows to the first capacitor. The uninterruptible power supply device of claim 1, further comprising: a set of output switches coupled between the inverter conversion circuit and a load, the set of output switches comprising a first output switch and a a second output switch; an LC circuit coupled between the first output switch, an output water line end and an output ground line end; and a relay switch coupled between an input water line end and the LC circuit . The uninterruptible power supply device of claim 7, further comprising a first electromagnetic interference filter circuit and a second electromagnetic interference filter circuit, wherein the first electromagnetic interference filter circuit is coupled to the rectifier circuit and an input The second electromagnetic interference filter circuit is coupled between the fire line end, the input water line end and an input ground line end, and the output line end, the output water line end and the output ground line end . The uninterruptible power supply device of claim 8, further comprising a relay unit coupled between the rectifier circuit and the first electromagnetic interference filter circuit. The uninterruptible power supply device of claim 7, further comprising a phase lock control circuit coupled to the relay switch when the output phase of the uninterruptible power supply is the same as the input phase of the mains The phase lock control circuit controls the conduction of the relay switch such that the input water line end is connected to the output water line end through the LC circuit.