CN201878022U - An Input Rectification Circuit of Auxiliary Power Supply - Google Patents

Abstract

An input rectifying circuit of an auxiliary power supply is provided with an auxiliary power supply circuit, a booster circuit, a direct-current energy storage circuit, an inverter output circuit, diodes D1, D2 and a power switch SW1, wherein the auxiliary power supply circuit is provided with a transformer TX1 and a MOSFET (metal-oxide-semiconductor field effect transistor) Q2; the booster circuit is provided with an inductor L1, a rectifier bridge REC1, an IGBT tube Q1, a diode D3 and a diode D4, wherein the anode of the diode D1 and the normally closed contact of a power switch SW1 are connected with the end L of a mains supply, the anode of the diode D2, the end 2 of the rectifier bridge REC1, the cathode of a polar capacitor C1, the anode of the polar capacitor C2 and the end 2 of an inverter circuit are connected with the end N of the mains supply, and the cathode of the diode D1 and the cathode of the diode D2 are connected with the end 1 of a transformer TX 1. The utility model discloses can utilize the partial component of main circuit to less components and parts realize being the auxiliary power supply after the commercial power full wave rectification, circuit structure is simple, low cost.

Description

An Input Rectification Circuit of Auxiliary Power Supply

technical field

The utility model relates to an uninterruptible power supply (UPS) technology, in particular to an input rectifying circuit of an auxiliary power supply.

Background technique

In the UPS power supply, in order to reduce the energy storage filter capacitor at the input and output ends of the auxiliary power supply, the mains usually needs to pass through a full-wave rectification circuit to supply power to the auxiliary power supply. At the same time, the auxiliary power supply usually needs to establish a power supply before the main circuit works, so the auxiliary power supply needs 4 diodes for a single phase to achieve full-wave rectification in the process of taking power from the mains. As shown in Figure 2, four diodes (D1, D2, D3, D4) are used to realize full-wave rectification from the mains to the auxiliary power supply, which requires many components, complex structure, and high cost.

In view of the deficiencies of the prior art, it is necessary to provide an input rectifying circuit of an auxiliary power supply to solve the deficiencies of the prior art.

Contents of the invention

The purpose of the utility model is to avoid the deficiencies of the prior art and provide an input rectifying circuit of an auxiliary power supply with a simple structure and low cost.

The purpose of this utility model is achieved through the following technical measures.

An input rectification circuit of an auxiliary power supply, which is provided with an auxiliary power supply circuit, a boost circuit, a DC energy storage circuit, an inverter output circuit, diodes D1, D2 and a power switch SW1;

The auxiliary power supply circuit is provided with a transformer TX1 and a MOSFET tube Q2, and the transformer TX1 is provided with terminals 1, 2, 3 and 4;

The boost circuit is provided with an inductor L1, a rectifier bridge REC1, an IGBT tube Q1, diodes D3 and D4, and the rectifier bridge REC1 is provided with terminals 1, 2, 3 and 4;

The DC energy storage circuit is provided with polar capacitors C1 and C2;

The inverter output circuit is provided with 1 terminal, 2 terminals and 3 terminals;

The positive pole of the diode D1 and the normally closed contact of the power switch SW1 are connected to the L terminal of the mains, the positive pole of the diode D2, the two terminals of the rectifier bridge REC1, the negative pole of the polar capacitor C1, and the positive pole of the polar capacitor C2 2. Terminal 2 of the inverter circuit is connected to the N terminal of the mains, the negative pole of the diode D1 and the negative pole of D2 are connected to the 1 terminal of the transformer TX1, and the 2 terminals of the transformer TX1 are connected to the drain of the MOSFET Q2. The source of MOSFET Q2, terminal 1 of rectifier bridge REC1 are connected to the emitter of IGBT tube Q1, the normally open contact of power switch SW1 is connected to one end of inductance L1, the other end of inductance L1, the anode of diode D3, two The negative pole of the stage tube D4 is connected to the 4 terminals of the rectifier bridge REC1, the negative pole of the diode D3 and the positive pole of the polarity capacitor C1 are connected to the 1 terminal of the inverter output circuit, the negative pole of the diode D4, the pole The negative pole of the linear capacitor C2 is connected to the 3 terminals of the inverter circuit.

The model of the diode D1 is 1N4007.

The model of the diode D2 is 1N4007.

The inductance L1 is 500uH.

The model of the IGBT tube Q1 is IRG4PC40W.

The model of the MOSFET Q2 is IRF640.

The model of the diode D3 is RHRP15120.

The model of the diode D4 is RHRP15120.

The polarity capacitor C1 is set to 1600uF, 450V.

The polarity capacitor C2 is set to 1600uF, 450V.

An input rectifying circuit of an auxiliary power supply of the utility model is provided with an auxiliary power supply circuit, a boost circuit, a DC energy storage circuit, an inverter output circuit, diodes D1, D2 and a power switch SW1; the auxiliary power supply circuit is provided with a transformer TX1 and MOSFET tube Q2, the transformer TX1 is provided with 1 terminal, 2 terminals, 3 terminals and 4 terminals; the boost circuit is provided with inductor L1, rectifier bridge REC1, IGBT tube Q1, diodes D3, D4, the The rectifier bridge REC1 is provided with 1 terminal, 2 terminals, 3 terminals and 4 terminals; the DC energy storage circuit is provided with polar capacitors C1 and C2; the inverter output circuit is provided with 1 terminal, 2 terminals and 3 terminals; The positive pole of the diode D1 and the normally closed contact of the power switch SW1 are connected to the L terminal of the mains, the positive pole of the diode D2, the two terminals of the rectifier bridge REC1, the negative pole of the polar capacitor C1, and the positive pole of the polar capacitor C2 2. Terminal 2 of the inverter circuit is connected to the N terminal of the mains, the negative pole of the diode D1 and the negative pole of D2 are connected to the 1 terminal of the transformer TX1, and the 2 terminals of the transformer TX1 are connected to the drain of the MOSFET Q2. The source of MOSFET Q2, terminal 1 of rectifier bridge REC1 are connected to the emitter of IGBT tube Q1, the normally open contact of power switch SW1 is connected to one end of inductance L1, the other end of inductance L1, the anode of diode D3, two The negative pole of the stage tube D4 is connected to the 4 terminals of the rectifier bridge REC1, the negative pole of the diode D3 and the positive pole of the polarity capacitor C1 are connected to the 1 terminal of the inverter output circuit, the negative pole of the diode D4, the pole The negative pole of the linear capacitor C2 is connected to the 3 terminals of the inverter circuit. Part of the components of the main circuit can be used to supply power for the auxiliary power supply after full-wave rectification of the commercial power with fewer components. The circuit structure is simple and the cost is low.

Description of drawings

Utilize accompanying drawing to further illustrate the utility model, but the content in the accompanying drawing does not constitute any limitation to the utility model.

Fig. 1 is a circuit diagram of an input rectifying circuit of an auxiliary power supply of the present invention.

Fig. 2 is a circuit diagram of an input rectifying circuit of an auxiliary power supply in the prior art.

In Figure 1, including:

Auxiliary power supply circuit 100,

booster circuit 200,

DC energy storage circuit 300,

Inverting output circuit 400.

Detailed ways

The utility model is further described in conjunction with the following examples.

Example 1.

An input rectification circuit of an auxiliary power supply, as shown in Figure 1, is provided with an auxiliary power supply circuit 100, a boost circuit 200, a DC energy storage circuit 300, an inverter output circuit 400, diodes D1, D2 and a power switch SW1, the power switch SW1 can be a relay or SCR, etc.

The auxiliary power supply circuit 100 is provided with a transformer TX1 and a MOSFET tube Q2, and the transformer TX1 is provided with a terminal 1, a terminal 2, a terminal 3 and a terminal 4.

The boost circuit 200 is provided with an inductor L1, a rectifier bridge REC1, an IGBT tube Q1, diodes D3 and D4, and the rectifier bridge REC1 is provided with terminals 1, 2, 3 and 4.

The DC energy storage circuit 300 is provided with polar capacitors C1 and C2; the inverter output 400 is provided with terminals 1, 2 and 3.

The positive pole of the diode D1 and the normally closed contact of the power switch SW1 are connected to the L terminal of the mains, the positive pole of the diode D2, the two terminals of the rectifier bridge REC1, the negative pole of the polar capacitor C1, and the positive pole of the polar capacitor C2 2. Terminal 2 of the inverter circuit is connected to the N terminal of the mains, the negative pole of the diode D1 and the negative pole of D2 are connected to the 1 terminal of the transformer TX1, and the 2 terminals of the transformer TX1 are connected to the drain of the MOSFET Q2. The source of MOSFET Q2, terminal 1 of rectifier bridge REC1 are connected to the emitter of IGBT tube Q1, the normally open contact of power switch SW1 is connected to one end of inductance L1, the other end of inductance L1, the anode of diode D3, two The negative pole of the stage tube D4 is connected to the 4 terminals of the rectifier bridge REC1, the negative pole of the diode D3 and the positive pole of the polarity capacitor C1 are connected to the 1 terminal of the inverter output power 400, the negative pole of the diode D4, the The negative pole of the polarity capacitor C2 is connected to the 3 terminals of the inverter circuit.

In the input rectifying circuit of an auxiliary power supply of the utility model, the mains L terminal, the diode D1, the transformer TX1, the MOSFET tube Q2, the rectifier bridge REC1 and the mains N terminal constitute the mains positive half cycle loop; and the mains N terminal, The diode D2, the transformer TX1, the MOSFET tube Q2, the rectifier bridge REC1, the inductor L1, the power switch SW1 and the L terminal of the mains form a negative half-cycle circuit of the mains. This circuit utilizes the rectifier bridge REC1 of the main circuit to form a full-wave rectification and power-taking circuit for the auxiliary power supply circuit 100 . When the UPS is in standby mode, since the power switch SW1 is not closed, the mains power is half-wave rectified to supply power to the auxiliary power circuit 100 . The standby power consumption is small, and there is no need to increase the energy storage capacitor of the auxiliary power supply. When the UPS is in normal operation, the power switch SW1 is closed, and the mains power supplies power to the auxiliary power circuit 100 after full-wave rectification. Therefore, the utility model can use some components of the main circuit to supply power for the auxiliary power supply after full-wave rectification of the commercial power with fewer components, and the circuit structure is simple and the cost is low.

Example 2.

An input rectification circuit for an auxiliary power supply, the other structures are the same as in Embodiment 1, the difference is that the type of diode D1 is 1N4007, the type of diode D2 is 1N4007, and the inductor L1 is 500uH.

The model of IGBT tube Q1 is IRG4PC40W, the model of MOSFET tube Q2 is IRF640, the model of diode D3 is RHRP15120, and the model of diode D4 is RHRP15120.

The polarity capacitor C1 is set to 1600uF, 450V; the polarity capacitor C2 is set to 1600uF, 450V.

The circuit can use some components of the main circuit to supply power for the auxiliary power after realizing the full-wave rectification of the commercial power with fewer components and components. The circuit structure is simple and the cost is low.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should It is understood that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (10)

1. the input rectification circuit of an accessory power supply is characterized in that:

Be provided with auxiliary power circuit, booster circuit, dc energy storage circuit, inverter output circuit, diode D1, D2 and power switch SW1;

Described auxiliary power circuit is provided with transformer TX1 and MOSFET pipe Q2, and described transformer TX1 is provided with 1 end, 2 ends, 3 ends and 4 ends;

Described booster circuit is provided with inductance L 1, rectifier bridge REC1, IGBT pipe Q1, diode D3, D4, and described rectifier bridge REC1 is provided with 1 end, 2 ends, 3 ends and 4 ends;

Described dc energy storage circuit is provided with polar capacitor C1 and C2;

Described inverter output circuit is provided with 1 end, 2 ends and 3 ends;

The positive pole of described diode D1, the normally-closed contact of power switch SW1 is connected with civil power L end, the positive pole of described diode D2,2 ends of rectifier bridge REC1, the negative pole of polar capacitor C1, the positive pole of polar capacitor C2,2 ends of inverter circuit are connected with civil power N end, the negative pole of described diode D1, the negative pole of D2 is connected with 1 end of transformer TX1,2 ends of described transformer TX1 are connected with the drain electrode of MOSFET pipe Q2, the source electrode of described MOSFET pipe Q2,1 end of rectifier bridge REC1 is connected with the emitter of IGBT pipe Q1, the normally opened contact of power switch SW1 is connected with an end of inductance L 1, the other end of inductance L 1, the positive pole of diode D3, the negative pole of diode D4 is connected with 4 ends of rectifier bridge REC1, the negative pole of described diode D3, the positive pole of described polar capacitor C1 is connected the negative pole of described diode D4 with 1 end of inverter output circuit, the negative pole of described polar capacitor C2 is connected with 3 ends of described inverter circuit.

2. the input rectification circuit of accessory power supply according to claim 1, it is characterized in that: the model of described diode D1 is 1N4007.

3. the input rectification circuit of accessory power supply according to claim 1, it is characterized in that: the model of described diode D2 is 1N4007.

4. the input rectification circuit of accessory power supply according to claim 1 is characterized in that: described inductance L 1 is 500uH.

5. the input rectification circuit of accessory power supply according to claim 1 is characterized in that: the model of described IGBT pipe Q1 is IRG4PC40W.

6. the input rectification circuit of accessory power supply according to claim 1 is characterized in that: the model of described MOSFET pipe Q2 is IRF640.

7. the input rectification circuit of accessory power supply according to claim 1, it is characterized in that: the model of described diode D3 is RHRP15120.

8. the input rectification circuit of accessory power supply according to claim 1, it is characterized in that: the model of described diode D4 is RHRP15120.

9. the input rectification circuit of accessory power supply according to claim 1, it is characterized in that: described polar capacitor C1 is set to 1600uF, 450V.

10. the input rectification circuit of accessory power supply according to claim 1, it is characterized in that: described polar capacitor C2 is set to 1600uF, 450V.

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