CN107294354A - Be delayed power supply and self-service device - Google Patents

Abstract

The invention provides a delayed power supply and self-service equipment. The delayed power supply has an AC-DC converter, a power factor correction circuit, an LCC resonant circuit, and a flyback circuit. ‑When the AC power input by the DC converter stops, the power stored in the capacitor is converted from high voltage to low voltage, and is output as a delayed power supply when the power is cut off. Therefore, without additionally setting a large-capacity delayed power supply capacitor outside the power supply, the delayed power supply for post-power failure processing can be provided to electrical equipment during a power failure, reducing costs and energy consumption.

Description

Delayed power supply and self-service equipment

technical field

The invention relates to a delayed power supply and self-service equipment, in particular to a delayed power supply capable of providing power for processing after a power failure, and a self-service equipment equipped with the delayed power supply.

Background technique

A power supply is a device that supplies power to electrical equipment such as electronic equipment or electrical equipment, and is widely used in various electrical equipment in various industries. For example, the power supply converts externally input power into power suitable for use by electrical equipment, and provides the electrical equipment for its normal operation.

When externally input power is interrupted, for example, when a power outage occurs, some units of the power consumption equipment need to perform post-power outage processing in order to cope with the power outage. In order to supply these units with power to perform post-power outage processing, it is necessary to implement delayed power supply.

At present, in order to realize delayed power supply, a method of additionally installing a large-capacity capacitor and providing delayed power supply through the capacitor is adopted. However, the cost of large-capacity capacitors is high, resulting in an increase in the cost of electrical equipment. Moreover, it may also cause an increase in energy consumption of electrical equipment.

As an example of electrical equipment, in financial institutions such as banks, automatic transaction devices are widely used in order to reduce the burden on staff such as supervisors, and to automate operations such as deposit processing and withdrawal processing for users to improve services to users. and other self-service equipment. In addition, various self-service devices for users to perform prescribed services (such as paying electricity bills) by themselves are also widely used.

In these self-service devices, card readers are generally provided for users to use bank cards to conduct transactions or handle business. In order to return the card inserted by the user from the card slot to the user, the card reader is provided with a card return unit capable of feeding the card to the card slot. In the event of a power outage when the user inserts the card for transactions, the self-service equipment needs to ensure that the bank card is transported to the card entrance and exit for return to the user.

At present, in order to ensure that the self-service equipment will discharge the card when there is a power failure during the transaction, an additional large-capacity capacitor is installed on the card reader to supply power to the card reader as described above. This has resulted in increased costs and increased energy consumption for self-service devices.

Contents of the invention

In order to solve at least one of the above-mentioned technical problems in the prior art, the present invention adopts the following technical solutions.

The present invention provides a delayed power supply, which has an AC-DC converter, a power factor correction circuit and an LCC resonant circuit, and the AC-DC converter converts the AC power input from the outside of the delayed power supply into DC power, And output to the power factor correction circuit, the power factor correction circuit is connected to the output side of the AC-DC converter for improving the power factor, the LCC resonant circuit is connected to the output of the power factor correction circuit side, convert the input direct current from high voltage to low voltage, and use it as the normal power supply output of the delayed power supply, and the delayed power supply is characterized in that it also has: a flyback circuit, and The internal capacitor of the power supply is connected to convert the electric power accumulated in the capacitor from a high voltage to a low voltage when the AC input from the outside of the delayed power supply to the AC-DC converter stops, and serve as The delayed power supply output of the delayed power supply when the power is cut off.

According to the delayed power supply power supply of the present invention, it is not necessary to additionally set a large-capacity delayed power supply capacitor outside the power supply, and can provide delayed power supply for power-consuming equipment to be used for post-power failure processing during a power failure, reducing costs and Reduced energy consumption.

In the delayed power supply of the present invention, the capacitor may be a capacitor included in the power factor correction circuit.

Therefore, by using the capacitance originally provided by the power factor correction circuit, there is no need to provide additional capacitance inside the power supply, further reducing the cost and energy consumption.

The delayed power supply of the present invention can also be that the capacitance value of the capacitor is more than 2E/(U _H ² -U _L ² ), wherein E is the electric energy required for the delayed power supply, and U _H is the capacitor when the power is cut off. The initial voltage, _UL is the minimum voltage required for the capacitor to handle after a power outage.

Therefore, the capacitance of the existing power factor correction circuit can generally provide delayed power supply for post-power failure processing, and there is no need to change the capacitance of the existing power factor correction circuit.

The delayed power supply of the present invention may also have: a switch, arranged between the power factor correction circuit and the LCC resonant circuit, input to the AC-DC converter from the outside of the delayed power supply It is turned on when the alternating current is on, and is turned off when the alternating current input from the outside of the delayed power supply to the AC-DC converter stops.

As a result, during a power failure, the electric energy stored in the capacitor of the power factor correction circuit can be preferentially output as delayed power supply through the flyback circuit.

The delayed power supply of the present invention may also be that the capacitor is an additional capacitor inside the delayed power supply, and one end of the capacitor is grounded, and the delayed power supply also has a diode, and the anode of the diode is connected to The negative pole of the output side of the power factor correction circuit is connected to the other end of the capacitor, and the flyback circuit is connected to the junction of the diode and the capacitor.

Thus, by adding a diode and a capacitor, it is possible to extend the delay power supply time without being affected by shutting off within a certain period of time after a power failure. Especially in the case that the load of the power consumption unit is small, the delayed power supply time can be greatly extended.

In the delayed power supply of the present invention, the flyback circuit may use the electric power stored in the additional capacitor and the electric power stored in the capacitor included in the power factor correction circuit as the delayed power supply in the delayed power supply. Delayed power supply output during power failure.

As a result, the electric energy stored in the capacitor inside the power supply can be more fully utilized.

The delayed power supply of the present invention can also be that the capacitance value of the added capacitor is roughly equal to 2E/(U _H ² -U _L ² ), where E is the electric energy required for the delayed power supply, and U _H is the energy required for power failure. The initial voltage of the added capacitor, _UL is the minimum voltage required by the added capacitor for post-power failure processing.

Thus, the cost of the power supply is reduced by using low-cost small-capacity capacitors.

The present invention also provides a self-service device for users to perform self-service operations, which is characterized in that the self-service device has any one of the above-mentioned delayed power supplies to provide delayed power supply during power outages.

According to the self-service equipment of the present invention, it is possible to secure delayed power supply for processing after a power failure at the time of a power failure.

The self-service equipment of the present invention may also have: a bayonet for the user to insert a card; and a card reader, which is arranged on the inside of the bayonet for reading the information recorded on the card; the delayed power supply The power supply provides delayed power supply to the card reader when the power fails, and the card reader uses the delayed power supply to transport the card to the card-in/out port.

Therefore, the self-service device does not need to install additional large-capacity capacitors on the card reader, and can provide the card reader with delayed power supply for post-power outage processing such as card return processing during a power outage, reducing costs and energy consumption.

Description of drawings

FIG. 1 is a circuit diagram showing a delay power supply in the prior art.

Fig. 2 is a circuit diagram showing a delayed power supply according to the first embodiment.

FIG. 3 is a timing chart showing power supply when the external input stops when the power consumption unit is fully loaded in the prior art.

4 is a timing chart showing power supply when the external input stops when the power consumption unit is fully loaded in the first embodiment.

FIG. 5 is a timing chart showing power supply when the external input stops when the power consumption unit is not fully loaded in the prior art.

6 is a timing chart showing power supply when the external input stops when the power consumption unit is not fully loaded in the first embodiment.

Fig. 7 is a circuit diagram showing a delayed power supply according to a second embodiment.

8 is a timing chart showing power supply when the external input stops when the power consumption unit is fully loaded in the second embodiment.

9 is a timing chart showing power supply when the external input stops when the power consumption unit is not fully loaded in the second embodiment.

Fig. 10 is a schematic diagram of the appearance of the self-service device in the third embodiment.

Fig. 11 is a schematic diagram of the internal structure of the self-service device in this embodiment.

Explanation of reference signs:

100, 110 power supply; 101 AC-DC converter (AC-DC converter); 102 power factor correction circuit (PFC circuit); 103LCC resonant circuit; 104 flyback circuit (FLYBACK circuit); 105 switch; C1 capacitor; D1 diode ; C2 capacitor; 200 power consumption unit; 201 normal input circuit; 202 spare input circuit; 1 self-service equipment; 2 operation panel; 3 operation buttons; 4 password input part; Withdrawal port; 8 receipt exit; 9 banknote processing mechanism; 10 control department; 210 card reader.

detailed description

The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments. In addition, the same reference numerals are attached to the same or corresponding parts in the drawings, and repeated descriptions are omitted.

(first embodiment)

The delayed power supply of this embodiment will be described below with reference to the accompanying drawings. For ease of understanding, the manner of implementing delayed power supply in the prior art is firstly described. FIG. 1 is a circuit diagram showing a delay power supply in the prior art. As shown in Figure 1, in the power supply, the AC-DC converter (AC-DC converter) converts the external AC power into DC power, the power factor correction circuit (PFC circuit) improves the power factor, and the LCC resonant circuit performs rectification and voltage transformation output to the power unit. The power consumption unit inputs the output power provided by the power supply from the normal input circuit, and provides the power required for the operation of the power consumption unit in a normal state. In addition, in order to provide the power consumption unit with the power required for post-power failure processing during a power failure, an additional capacitor for delay power supply is provided. In order to provide sufficient power required for post-power failure processing, the delay power supply capacitor needs to use a large-capacity capacitor, for example, 56000 μF. Therefore, the additional large-capacity delayed power supply capacitor not only has a high cost, but may also increase energy consumption.

As shown in FIG. 1 , in the prior art power supply, a power factor correction circuit (PFC) is provided with an electrolytic capacitor C1. This embodiment uses the electric energy stored in the capacitor on the power factor correction circuit inside the power supply, and provides it to the power consumption unit by setting the conversion circuit, so as to realize the delayed power supply during power failure, thereby reducing the large capacity of the prior art. Delay power supply capacitor.

Fig. 2 is a circuit diagram showing a delayed power supply according to the first embodiment. As shown in FIG. 2 , the power supply 100 of this embodiment has an AC-DC converter (AC-DC converter) 101, a power factor correction circuit (PFC circuit) 102, an LCC resonant circuit 103, and a flyback circuit (FLYBACK circuit) 104. .

The AC-DC converter 101 converts the AC power input from the outside into DC power, and outputs it to the power factor correction circuit 102 . Here, the AC-DC converter 101 can utilize various AC-DC converters (AC-DC converters) in the prior art.

The power factor correction circuit 102 is connected to the output side of the AC-DC converter 101 for improving the power factor. Among them, the power factor represents the utilization efficiency of electric energy by equipment. The power factor correction circuit 102 can utilize various power factor correction circuits (PFC circuits) in the prior art. In FIG. 2 , the capacitor C1 included in the power factor correction circuit 102 is shown alone. The capacitor C1 is, for example, an electrolytic capacitor, which is provided in a power factor correction circuit (PFC circuit) in the prior art, and one end thereof is grounded.

The LCC resonant circuit 103 is connected to the output side of the power factor correction circuit 102 , converts the input direct current from high voltage to low voltage, and outputs it as a normal power supply of the power supply 100 . In addition, the LCC resonance circuit 103 may perform rectification.

The flyback circuit 104 is also connected to the output side of the power factor correction circuit 102, that is, connected to the capacitor C1. The power is converted from high voltage to low voltage, and is output as a delayed power supply of the power supply 100 during a power failure.

As shown in FIG. 2 , the LCC resonant circuit 103 of the power supply 100 is connected to the normal input circuit 201 of the power consumption unit 200 , and supplies power to the power consumption unit 200 in the normal state of non-power failure. The flyback circuit 104 of the power supply 100 is connected to the standby input circuit 202 of the power consumption unit 200, and provides delayed power supply to the power consumption unit 200 in a power failure state. Therefore, without additionally setting a large-capacity delayed power supply capacitor outside the power supply, the delayed power supply for post-power failure processing can be provided to electrical equipment during a power failure, reducing costs and energy consumption. In particular, by using the capacitor C1 originally included in the power factor correction circuit 102, there is no need to provide additional capacitors inside the power supply, further reducing costs and energy consumption.

In addition, the power supply 100 may also provide a switch 105 between the power factor correction circuit 102 and the LCC resonant circuit. The switch 105 is turned on when the AC power is input to the AC-DC converter 101 from the outside, and the switch 105 is turned off when the AC power input to the AC-DC converter 101 from the outside is stopped. Thus, during a power failure, the electric energy stored in the capacitor C1 of the power factor correction circuit 102 can be preferentially output through the flyback circuit 104 as delayed power supply.

As for whether the capacitor C1 of the power factor correction circuit 102 can provide the required delayed power supply, the inventors of the present application conducted the following analysis and verification respectively through theory and experiments.

Firstly, by comparing the prior art with the present embodiment in theory, it is analyzed whether the capacitor C1 of the power factor correction circuit 102 can provide a delayed power supply meeting the requirement.

In the case of an additional large-capacity delay power supply capacitor in the prior art, according to the capacitance energy formula, the electric energy E that the delay power supply capacitor can provide after a power failure is 1/2×C _E-cap (U ₀ ² -U ₁ ² ). Among them, the capacitance value of C _E-cap as a capacitor for delayed power supply is set to 56000 μF, U ₀ is used as a capacitor for delayed power supply, and the initial voltage after power failure is set to 24V, and U ₁ is used as a capacitor for delayed power supply for post-power failure processing The minimum voltage required is set to 18V.

In the case of using the capacitor C1 of the power factor correction circuit 102 in this embodiment, according to the capacitance energy formula, the electric energy that the capacitor C1 can provide after a power failure is 1/2×C ₁ (U _H ² −U _L ² ). Among them, C ₁ is the capacitance value of capacitor C1, U _H is used as the initial voltage of capacitor C1 after power failure is set to 390V, and U _L is used as the minimum voltage of capacitor C1 for post-power failure processing and is set to 192V.

Explain the reason for setting U _H and U _L as above. The internal voltage of the power supply 100 (that is, the PFC voltage) is the voltage before the LCC resonant circuit 103 steps down the voltage, which is generally 400V. Based on this voltage, the initial voltage U _H of the capacitor C1 after power failure is set to 390V, so as to leave a certain margin. In addition, the minimum voltage UL required by the capacitor C1 for post-power failure processing depends on the step-down ratio of the flyback circuit 104, which is set to _192V here.

In the case that the present embodiment provides delayed power supply energy equal to that of the prior art, the electric energy 1/2×C ₁ (U _H ² -U _L ² ) that capacitor C1 can provide after power failure is equal to the delay power supply capacitor in The electric energy E that can be provided after a power failure is 1/2×C _E-cap (U ₀ ² −U ₁ ² ). From this, it can be confirmed that C ₁ at this time is 2E/(U _H ² −U _L ² )=122 μF. That is, when the capacitance C1 is 2E/(U _H ² −U _L ² ), that is, 122 μF or more, this embodiment can provide delayed power supply energy equal to that of the prior art. In a common power factor correction circuit (PFC circuit), the electrolytic capacitor C1 is generally greater than 122 μF. Therefore, the power supply 100 of this embodiment can theoretically provide delayed power supply as required.

Next, by comparing the prior art with the present embodiment through experiments, it is analyzed whether the capacitor C1 of the power factor correction circuit 102 can provide a delayed power supply meeting the requirements.

FIG. 3 is a timing chart showing power supply when the external input stops when the power consumption unit is fully loaded in the prior art. Figure 3 shows an example where the load of the power consumption unit is 100%. In the case of additionally setting a large-capacity delay power supply capacitor in the prior art, when a 20ms instantaneous power failure occurs in the external input, the power supply to the power consumption unit The power supply is uninterrupted. When the external input stops, the delayed power supply from the power supply to the power unit is more than 20ms.

4 is a timing chart showing power supply when the external input stops when the power consumption unit is fully loaded in the first embodiment. FIG. 4 shows an example where the load of the power consumption unit 200 is 100%. In this embodiment, when the capacitor C1 of the power factor correction circuit 102 is used, the power supply 100 will supply power The power supply of the unit 200 is uninterrupted, and when the external input stops, the delayed power supply from the power supply 100 to the power consumption unit 200 is more than 20 ms. According to the experimental results, even under the condition of full load, the power supply 100 of this embodiment can provide delayed power supply as required.

(second embodiment)

This embodiment is a further improvement on the power supply 100 of the first embodiment. Descriptions of the same or similar contents as those in the first embodiment are omitted in this embodiment.

As described above, when the power consumption unit 200 is fully loaded, the power supply 100 of the first embodiment can provide a power supply delay time similar to that of the prior art after the external input is stopped. Next, in order to further improve the performance of the power supply of the present invention, the inventors of the present application study the situation that the power consumption unit 200 is not fully loaded.

FIG. 5 is a timing chart showing power supply when the external input stops when the power consumption unit is not fully loaded in the prior art. Figure 5 shows an example where the load of the power consumption unit is 30%. In the case of additionally setting a large-capacity delay power supply capacitor in the prior art, when a 20ms instantaneous power failure occurs in the external input, the power supply to the power consumption unit The power supply is uninterrupted. When the external input stops, the delayed power supply time of the power supply to the power unit is greatly extended compared with the full load. As shown by the dotted circle in Figure 5, it may reach 80ms.

6 is a timing chart showing power supply when the external input stops when the power consumption unit is not fully loaded in the first embodiment. FIG. 6 also shows an example where the load of the power consumption unit 200 is 30%. In the case of using the capacitor C1 of the power factor correction circuit 102 in the first embodiment, when a 20 ms momentary power failure occurs in the external input, the power supply to the consumption unit The power supply of the electric unit 200 is uninterrupted. When the external input stops, as shown by the dotted circle in FIG. 6 , the delayed power supply from the power supply 100 to the electric unit 200 is similar to that at full load, and cannot reach such a long time as 80ms. This is because the power factor correction circuit 102 is generally provided with a cut-off circuit that cuts off within a certain period of time after a power failure on the input side of a fast soft recovery diode (LLD). cut off, and cannot continue to provide delayed power supply.

Although the power supply 100 of the first embodiment provides power supply with a delay of more than 20 ms after a power failure, it can meet the requirements of general standards, but in order to further improve performance, the inventors of the present application have made further improvements in this embodiment, which will be described in detail below .

Fig. 7 is a circuit diagram showing a delayed power supply according to a second embodiment. The power supply 110 of this embodiment has an AC-DC converter 101 , a power factor correction circuit 102 and an LCC resonance circuit 103 . These circuit structures are the same as the corresponding structures of the power supply 100 of the first embodiment, and will not be repeated here. In the power supply 110 of this embodiment, a diode D1 and a capacitor C2 are added to the power supply 100 of the first embodiment. The anode of the diode D1 is connected to the output side of the power factor correction circuit 102, and the cathode is connected to one end of the capacitor C2. The other end of C2 is grounded. In addition, the flyback circuit 104 is connected to the junction of the diode D1 and the capacitor C2 , that is, connected to the output side of the power factor correction circuit 102 via the diode D1 . In addition, the power supply 110 of this embodiment does not include the switch 105 .

In this way, when an AC power is input to the AC-DC converter 101 from the outside, the diode conducts forward and charges the capacitor C2. When the AC power input from the outside to the AC-DC converter 101 stops, the electric energy stored in the capacitor C2 and the electric energy flowing into the capacitor C2 from the capacitor C1 through the diode D1 provide delayed power supply to the electric unit 200 through the flyback circuit 104, and at the same time The diode D1 cuts off the path from the capacitor C2 to the LCC resonant circuit 103 to prevent the electric energy stored in the capacitor C2 from flowing to the LCC resonant circuit 103 . Thus, by adding a diode and a capacitor, it is possible to extend the delay power supply time without being affected by shutting off within a certain period of time after a power failure. Especially in the case that the load of the power consumption unit 200 is small, the delayed power supply time can be greatly extended.

Regarding the setting of the capacitance value of the capacitor C2, according to the theoretical calculation of the first embodiment, when the capacitor used to provide the delayed power supply in the power supply 110 is 2E/(U _H ² −U _L ² )=122 μF, it can Provides delayed power supply energy equal to that of the prior art. Here, the capacitor C2 can be set, for example, as a small-capacity capacitor approximately equal to 2E/(U _H ² −U _L ² ), that is, 122 μF, for example, a capacitor of 120 μF is selected. Therefore, only the capacitor C2 itself can provide delayed power supply energy equivalent to that of the prior art, and the cost of the power supply 110 is also reduced by using a low-cost small-capacity capacitor. In addition, in the case that the capacitor C2 itself can provide the required delayed power supply, the capacitor C1 may not be used to provide the delayed power supply.

Next, the delayed power supply effect of the power supply 110 in this embodiment is analyzed through experiments.

8 is a timing chart showing power supply when the external input stops when the power consumption unit is fully loaded in the second embodiment. Figure 8 shows an example where the load of the power consumption unit 200 is 100%. When an instantaneous power failure of 20 ms occurs in the external input, the power supply from the power supply 110 to the power consumption unit 200 is uninterrupted. The delayed power supply of the power consumption unit 200 is more than 20 ms. According to the experimental results, under the condition of full load, the power supply 110 of this embodiment can provide delayed power supply that meets requirements.

9 is a timing chart showing power supply when the external input stops when the power consumption unit is not fully loaded in the second embodiment. FIG. 9 shows an example where the load of the power consumption unit is 30%, wherein the solid line in the power supply waveform corresponds to the power supply 110 of this embodiment, and the dotted line corresponds to the power supply 100 of the first embodiment for comparison. When an instantaneous power failure of 20 ms occurs in the external input, the power supply of the power supply 110 of this embodiment to the power consumption unit is uninterrupted. When the external input stops, the delayed power supply time of the power supply 110 of this embodiment to the power consumption unit When fully loaded, it is greatly extended, and it may reach more than 80ms. FIG. 9 clearly shows that in the case of a partial load, especially a small load, the delayed power supply time of the power supply 110 of the present embodiment to the power consumption unit is greatly prolonged compared with the power supply 100 of the first embodiment.

(third embodiment)

This embodiment describes the case where the power supply 100 of the first embodiment or the power supply 110 of the second embodiment is applied to a self-service device. Regarding the same or similar contents as those in the first embodiment or the second embodiment, descriptions are omitted in this embodiment.

The self-service equipment involved in this embodiment will be described in detail with reference to the accompanying drawings. Fig. 10 is a schematic diagram of the appearance of the self-service device in the third embodiment. In FIG. 10 , the installation positions and shapes of each structure are only for illustration, and are not intended to limit the present invention. In practice, various appropriate installation positions and shapes can be adopted according to the situation. As shown in FIG. 10 , the self-service device 1 is, for example, an ATM (automatic teller machine, automatic teller machine) used for transactions such as withdrawals in a bank or the like. And then, self-service equipment 1 is not limited to ATM, also can be automatic transaction devices such as CRS (Cash Recycling Machine), TCR (Teller Cash Recycling Machine), VTM (Virtual Teller Machine), and also can be for users to self-help to carry out prescribed business ( Such as paying electricity bills, etc.) other various self-service equipment. The self-service device 1 has a display unit such as an operation panel (such as a touch screen) 2, an operation button 3, and a password input unit 4 for user operations to perform transactions. On the self-service device 1 , for example, a card slot 6 , a deposit and withdrawal port 7 , a receipt exit 8 , etc. are arranged on the front surface. The deposit and withdrawal port 7 is divided into, for example, an input port and a return port for banknotes. Inside the self-service machine 1, the banknote processing mechanism 9 and the control part 10 are accommodated. The control unit 10 is composed of, for example, a general-purpose computer or a dedicated integrated circuit, and controls the overall operation of the self-service device 1 . In addition, in the self-service machine 1 , for example, a display unit such as an operator operation panel 5 (for example, a touch panel) for an operator to operate is arranged on the rear surface.

Fig. 11 is a schematic diagram of the internal structure of the self-service device in this embodiment. In FIG. 11 , only the configurations related to the characteristics of the present invention are shown, and illustration of other configurations is omitted. The installation positions and shapes of each structure are only for illustration, and are not intended to limit the present invention. In practice, various appropriate installation positions and shapes can be adopted according to the situation. As shown in Figure 11, the self-service equipment 1 is equipped with a card reader 210 on the inside of the card entrance and exit 6, which can read the information recorded on cards such as magnetic cards or IC cards, so that the user can insert a bank card from the card entrance and exit 6 and use the card. Bank cards for transactions or business transactions. The card reader 210 is provided with a card return unit (not shown) capable of feeding the card to the card slot 6 in order to return the card inserted by the user through the card slot 6 to the user.

When the user inserts the card to conduct a transaction and encounters a power outage, the self-service device 1 needs to transport the bank card to the card inlet and outlet 6 so as to return it to the user. In order to ensure that the card is ejected when a power failure occurs during the transaction, the power supply 100 of the first embodiment or the power supply 110 of the second embodiment is used to provide delayed power supply to the card reader 210 in this embodiment. Thus, the card reader 210, as an example of the power consumption unit 200 in the first embodiment or the second embodiment, can use the delayed power supply of the power supply 100 or the power supply 110 to perform post-power failure processing after the self-service equipment 1 is powered off, so that The card unit operates and transports the card to the card in and out port 6 to be returned to the user. As a result, the self-service device 1 does not need to install additional large-capacity capacitors on the card reader 210, and can provide the card reader 210 with delayed power supply for card withdrawal processing and other post-power outage processing during a power failure, reducing costs and energy consumption.

A plurality of embodiments of the present invention have been described above with reference to the drawings. The embodiments described above are only specific examples of the present invention, and are used for understanding the present invention, and are not intended to limit the scope of the present invention. Those skilled in the art can make various modifications, combinations and reasonable omissions of elements to the various embodiments based on the technical idea of the present invention, and the resulting modes are also included in the scope of the present invention.

For example, the above-mentioned embodiment has described the example of using the capacitor in the power factor correction circuit 102 or setting the capacitor inside the power supply 110 to realize the delayed power supply, but the present invention is not limited thereto, and other existing capacitors can also be appropriately used inside the power supply Or set a capacitor, and set a flyback circuit connected to the capacitor to provide delayed power supply. According to the above theoretical research, it is also possible to provide delayed power supply for post-power failure processing to electrical equipment during power failure.

For example, the above-mentioned third embodiment has described an example in which the power supply 100 of the first embodiment or the power supply 110 of the second embodiment is applied to the card reader 210 of the self-service device 1, but the present invention is not limited thereto, and can also be applied to the self-service equipment. Other components of equipment 1 or other electrical equipment.

Claims (9)

1. one kind delay power supply, with AC-DC converter, circuit of power factor correction and LCC resonance circuits,

The AC-DC converter will be changed from the alternating current of the outside input of the delay power supply For direct current, and export to the circuit of power factor correction,

The circuit of power factor correction is connected to the outlet side of the AC-DC converter, for carrying High Power Factor,

The LCC resonance circuits are connected to the outlet side of the circuit of power factor correction, by input Direct current is converted to low-voltage from high voltage, and is exported as the general distribution of the delay power supply,

The delay power supply is characterised by also having：

Circuit of reversed excitation, with the capacitance connection positioned at the inside of the delay power supply, prolongs from described When power supply the alternating current that inputs to the AC-DC converter of outside when stopping, by the electricity The electric power accumulated in appearance is converted to low-voltage from high voltage, and is having a power failure as the delay power supply When delay power output.

2. be delayed power supply as claimed in claim 1, it is characterised in that

The electric capacity is the electric capacity that the circuit of power factor correction possesses.

3. be delayed power supply as claimed in claim 2, it is characterised in that

The capacitance of the electric capacity is 2E/ (U_H ²-U_L ²) more than, wherein E is the electricity needed for delay power supply Can, U_HThe initial voltage of the electric capacity, U during to have a power failure_LFor needed for the electric capacity is used for power failure post processing Minimum voltage.

4. be delayed power supply as claimed in claim 2 or claim 3, it is characterised in that also has：

Switch, be arranged between the circuit of power factor correction and the LCC resonance circuits, from The outside of the delay power supply to the AC-DC converter input AC it is electric when connect, from The alternating current that the outside of the delay power supply is inputted to the AC-DC converter is disconnected when stopping Open.

5. be delayed power supply as claimed in claim 1, it is characterised in that

The electric capacity is the electric capacity added in the inside of the delay power supply, a termination of the electric capacity Ground,

The delay power supply also has a diode, the positive pole of the diode be connected to the power because The outlet side of number correcting circuit, negative pole is connected to the other end of the electric capacity,

The circuit of reversed excitation is connected to the contact of the diode and the electric capacity.

6. be delayed power supply as claimed in claim 5, it is characterised in that

The circuit of reversed excitation is by the electric power accumulated in the electric capacity of the addition and the PFC The electric power accumulated in the electric capacity that circuit possesses, is used as delay of the delay power supply when having a power failure Power supply output.

7. the delay power supply as described in claim 5 or 6, it is characterised in that

The capacitance of the electric capacity of the addition is substantially equal to 2E/ (U_H ²-U_L ²), wherein E is delay power supply station The electric energy needed, U_HThe initial voltage of the electric capacity of the addition, U during to have a power failure_LFor the electric capacity of the addition For the minimum voltage needed for the post processing that has a power failure.

8. a kind of self-service device, self-help operation is carried out for user, it is characterised in that

The self-service device has the delay power supply any one of claim 1 to 7, with Delay when having a power failure is provided to power.

9. self-service device as claimed in claim 8, it is characterised in that also have：

Inward and outward card channel, inserts for user and blocks；And

Card reader, is arranged on the inner side of the inward and outward card channel, can read the information recorded on the card；

The delay power supply is powered to delay during card reader offer power failure, the card reader Powered using the delay and the card is delivered to the inward and outward card channel.