JP2003273559A - Power supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply device that has high efficiency and compactness as well as some advantages in assembling working and low cost by realizing configuration having a variety of function, and wherein an cooling fan can be quickly replaced without a risk of injury. <P>SOLUTION: A cooling fan for dissipating heating in a casing 25 is attached detachably to the casing 25 housing a power supply circuit and the like; and a protection member H is fitted in freely changeable way at a removal inhibiting position that is located forward the cooling fan to inhibit the cooling fan from being removed or at a removal enabling position that is located retarded from the front of the cooling fan to allow the cooling fan to be removed; thus the protection member H can be shifted to the removal enabling position in a state where the driving of the cooling fan is stopped. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, for example, normally drives a load by an output after rectification from a commercial AC power source (AC), and when an abnormality such as a power failure occurs, an output from a DC power source such as a secondary battery is used. The present invention relates to a power supply device that can easily and quickly configure an uninterruptible redundant power supply device that can drive a load. In particular, it can be diverted to an uninterruptible redundant power supply device used for operating highly important equipment such as crime prevention, disaster prevention, communication, information (server computer, FA personal computer, etc.), precision machinery for medical use and automatic machinery. Regarding power supply. Here, the power failure means that the power (current) supply is cut off, for example, when the power supply from the power company is cut off, the breaker is dropped, the outlet is pulled out, or the supply power is cut off. We will refer to cases such as being refused.

[0002]

2. Description of the Related Art When the above power supply device is used in, for example, a server computer or the like, it is necessary to construct an uninterruptible dual power supply device because there is a demand for non-stop continuous operation for 24 hours and 5 years. However, in a personal computer (personal computer) or the like used by an individual, the need for an uninterruptible dual power supply device is low because of problems such as high costs. However, the user needs an inexpensive power supply device that can be used only when the commercial AC power supply is normal, that is, only during normal operation, and can also use the device during abnormal times such as a power failure. Currently, two types of power supply devices are manufactured because they require a device.
In addition, there is a case where a power supply device different from the uninterruptible dual power supply device capable of coping with a power failure, that is, a power supply device having an additional output terminal for outputting a desired voltage is required. In addition to the power supply device, a total of three or more types of power supply devices will be manufactured. Further, the above power supply device is provided with a cooling fan for radiating the hot air inside to the outside so as to avoid a decrease in efficiency due to heat. Since this cooling fan has a life, it must be replaced. Therefore,
Conventionally, there has been proposed a configuration in which the cooling fan is stopped and the drive of the cooling fan is stopped by disconnecting the power supply connector of the cooling fan at the same time.

[0003]

When manufacturing three or more types of power supply devices as described above, not only the manufacturing cost increases, but also the storage cost after manufacturing increases as the type increases. It was high. The uninterruptible redundant power supply device shown in FIG. 6, for example, is conventionally known. This is a primary circuit composed of a rectifier circuit 4 connected to a commercial AC power supply 1, an active filter circuit 5, a switching element 8 for supplying a voltage to a secondary side drive circuit B via a high frequency transformer 2, a gate circuit 7 and the like. Side drive circuit A, a secondary battery 3 composed of a battery or the like connected to the secondary side drive circuit B, and a singular unit for stepping down to obtain a DC voltage of three different magnitudes to a load 14. 3 connected in parallel to the secondary side drive circuit B of
And a C-DC converter 50. 11 shown in the figure
Is a rectifying diode, 12 is a smoothing choke coil, and 13 is a smoothing capacitor. According to the above configuration, the secondary battery 3 or 3
Due to the connection of the individual DC-DC converters 50, not only the secondary side drive circuit B becomes complicated and large, but also DC-D
If the C converter 50 fails, there is also a disadvantage that the DC voltage at the location output via the DC-DC converter 50 cannot be taken out even during normal times (normal times). Further, since the DC-DC converter 50 is interposed, the efficiency of the switching power supply circuit on the primary side is 75 to 80%.
The efficiency of the secondary side DC-DC converter 50 is 75-80.
Since the total efficiency is about 55 to 64% multiplied by%, there is a problem that energy loss becomes a problem. or,
When replacing the cooling fan provided in the power supply unit, the cooling fan drive is stopped by completely removing the cooling fan.Therefore, rotate your finger by mistake while removing the cooling fan. I hit the blades of a cooling fan that was running, and I could get injured. or,
It is conceivable to remove the cooling fan carefully so as not to get injured, but the replacement work of the cooling fan requires a great deal of time and labor, and there was room for improvement.

Therefore, in view of the above situation, the present invention is to solve the problem that the power supply device having various functions and high efficiency and miniaturization can be constructed. Needless to say, the present invention is advantageous in terms of cost and further provides a power supply device that can replace the cooling fan quickly without any risk of injury.

[0005]

In order to solve the above-mentioned problems, a power supply device of the present invention comprises a rectifier circuit for rectifying AC from a commercial AC power supply, a switching element provided on the output side of this rectifier circuit, and the like. Connected to the primary winding of the high frequency transformer, the secondary winding of the high frequency transformer is connected to the secondary side DC output circuit that supplies power to the load, and the tertiary winding of the high frequency transformer and A DC power supply circuit different from the power supply circuit is provided with a connecting portion for connecting and disconnecting them, and at least the power supply circuit, primary side winding, secondary side DC output circuit, secondary side winding, tertiary A casing for accommodating the side winding is detachably attached with a cooling fan for releasing the heat generated inside thereof to the outside, and is positioned in front of the cooling fan to prevent the cooling fan from being removed. did A protective member is removably attached to a non-removable position and a removable position retracted from the front of the cooling fan to allow removal of the cooling fan, and the casing is attached to the casing to turn the cooling fan on and off. Only when the provided switch is turned off, or only when the plug of the pluggable power cord inserted into the input part provided in the casing for inputting the alternating current from the commercial AC power source is unplugged. Alternatively, only when the switch is turned off and the plug is pulled out, the protective member can be moved to the removable position. As described above, each of the primary side power supply circuit to which the commercial AC power source is added, the secondary side DC output circuit, and the tertiary side DC power supply circuit,
Each circuit can be simplified by connecting in a completely electrically insulated state via the high frequency transformer. Moreover, by providing a DC power supply circuit to which a secondary battery such as a battery is connected on the tertiary side, it is possible to change the output voltage on the secondary side simply by changing the number of turns of the secondary winding with respect to the high frequency transformer. Therefore, it becomes unnecessary to connect a plurality of step-down circuits such as DC-DC converters to a single secondary-side drive circuit as in the conventional case to form different output voltages. Further, by providing a DC power supply circuit different from the tertiary winding and the power supply circuit with a connecting portion for connecting and disconnecting them, various DC power supply circuits configured as necessary Common AC drive, such as configuring an uninterruptible dual power supply unit or a power supply unit that can output other output voltages of different sizes to the secondary side simply by connecting to the line connection A desired power supply device can be obtained simply by connecting the various DC power supply circuits to the side unit as necessary. When replacing the cooling fan, the cooling fan ON-OFF switch is turned OFF, or the plug of the power cord that can be plugged in and unplugged is disconnected to disconnect the AC from the commercial AC power supply, or both of them, that is, By turning off the switch and pulling out the plug, the drive of the cooling fan can be completely stopped, and then the position of the protective member can be changed to the removable position. That is, before removing the cooling fan, the operator intentionally operates the cooling fan O
By turning off the N-OFF switch or unplugging the plug of the power cord that can be unplugged and unplugged consciously, it is possible to recognize that the driving of the cooling fan has been stopped, and immediately move to the replacement work of the cooling fan. be able to.
Then, the cooling fan can be removed by changing the position of the protection member to the removable position. In addition, the cooling fan cannot be driven unless the protection member is repositioned to the non-removable position after the cooling fan is removed and a new cooling fan is attached. That is, the ON-OFF switch for the cooling fan cannot be turned ON, and the plug of the power cord that can be freely inserted / removed cannot be inserted.

A first radiating fin for radiating heat generated from the circuit components of the power supply circuit and the secondary side DC output circuit, and a first radiating fin for radiating heat generated from the circuit component of the DC power supply circuit. By providing two heat radiation fins and bringing the two heat radiation fins into contact with each other to bring them into a heat conducting state, the heat radiation area can be dramatically increased. In particular, in the case of an uninterruptible redundant power supply device, when the secondary side DC output circuit is driven by the power supply circuit, no current flows in the DC power supply circuit. The second radiating fin in the non-used state can be effectively used as a radiating fin that radiates the heat generated from the circuit component of the power supply circuit. Further, even when a power supply device capable of outputting another output voltage having a different magnitude to the secondary side is configured, in the state where the other output voltage is not used, the uninterruptible dual power supply device is used. Similarly to the above, the unused second heat radiation fin can be used as a heat radiation fin that radiates the heat generated from the circuit components of the power supply circuit.
In the case of an uninterruptible dual power supply unit, even if it fails due to lightning surges or various impulse surges, the DC power supply circuit instantly supplies power to it continuously without stopping the load. It has the advantage that it can be driven. The switching element for the DC power supply circuit switches from the idle operation or the OFF (stop) state to the active state when the voltage of the power supply circuit becomes lower than a predetermined voltage or becomes zero. The idle operation is a state in which the switching element repeats ON-OFF in synchronization with the switching element of the AC side power supply circuit, but no current flows.

The DC power supply circuit includes a switching element that operates in synchronization with the switching element of the power supply circuit or in accordance with the operating state of the power supply circuit.

An AC drive side unit is constituted by the power supply circuit, the primary side winding, the secondary side DC output circuit, the secondary side winding, the tertiary side winding, and the first radiation fin, and the AC drive side unit is the above-mentioned unit. Stored in a casing, the DC power supply circuit and the second
An air guide for forming a DC power supply circuit unit from the heat radiation fins, housing the DC power supply circuit unit in an auxiliary casing different from the casing, and moving the internal air in the auxiliary casing to the casing side by the cooling fan. By forming holes for use in the auxiliary casing and the casing, not only the casing but also the auxiliary casing can efficiently lower the internal temperature with a single cooling fan.

The circuit components can be efficiently radiated by using diodes and switching elements that generate a relatively large amount of heat.

[0010]

FIG. 1 shows a forward type uninterruptible redundant power supply system. This uninterruptible dual power supply device is a power supply circuit A for rectifying AC from the commercial AC power supply 1 and outputting it to the primary winding N1 of the high frequency transformer 2.
A secondary side DC output circuit B for electrically connecting the secondary side winding N2 of the high frequency transformer 2 in an electrically insulated state and supplying DC power to the load 8; and the high frequency transformer 2 A DC power supply circuit C for supplying power to the secondary side DC output circuit B from the output of a secondary battery (hereinafter referred to as battery) 3 according to the operating state of the power supply circuit A to the tertiary winding N3 of It consists of. As the battery 3, a nickel hydrogen battery, a lithium battery, a lead battery, or a nicad battery may be used. Further, as the redundant power supply device, there are a forward type, a flyback type, a full bridge type, a half bridge type, etc., and any type of redundant power supply device may be configured.

The power supply circuit A is a rectifier circuit 4 for rectifying AC from the commercial AC power supply 1, an active filter circuit (may be omitted) 5 as a harmonic current prevention circuit, and the active filter circuit. 5, a smoothing capacitor 6 for storing the DC voltage from the DC voltage control circuit 5, an FET 8 operated as a gate signal from the gate circuit 7 and connected to the primary winding N1 of the high frequency transformer 2, and the DC power supply circuit C. Although the reverse current blocking diode 9 as a means for blocking the reverse current of the overcurrent due to the induced voltage from the power supply circuit A to the power supply circuit A is a main component, other configurations may be used.

The secondary side DC output circuit B loads three kinds of DC output voltages (12V, 5V and 3.3V from the top in the figure, but the voltage value may be set in any way).
To each of the three secondary windings N2 having different numbers of turns so as to be output to (three here, but may be one or two or four or more). , A rectifying diode 11, a smoothing coil 12, a smoothing capacitor 13, and a control circuit 15 for controlling the ON time of the mag-amplifier 10 in order to control the voltage to the load 14 to a constant voltage. By providing the mag-amplifier 10 and the control circuit 15, there is an advantage that a constant voltage can be output to the load 14, but it may be omitted.

The DC power supply circuit C is a battery state monitoring signal circuit 16 for monitoring the state of the battery 3.
A charging circuit 17 for charging the battery 3, a gate signal from a gate circuit 18, and
A FET 19 as a switching element connected to the tertiary winding N3 of the high frequency transformer 2 and a reverse current blocking diode 20 as a means for blocking a reverse current of an overcurrent due to an induced voltage from the power source circuit A to the DC power source circuit C. However, other configurations may be used. The battery state monitoring signal circuit 16 detects whether the battery 3 is in a charging state or a discharging state, and outputs a control signal for performing charge control or discharge control for the battery 3 according to the output signal, 3 outputs a signal for stopping the discharge from the battery 3 when the voltage drop state of 3 is detected and the discharge end voltage is reached, or the DC power supply circuit C is driven or stopped by receiving a power failure detection signal or a power failure recovery signal. It is provided for exchanging various signals such as outputting a control signal for performing.

In the dual power supply device having the above structure, for example, a control circuit (not shown) always outputs a control signal to the two gate circuits 7 and 18 so that the two switching elements 8 and 19 are synchronized with each other. Alternatively, when the commercial AC power supply 1 is normal, the switching element 8 of the power supply circuit A is activated and the switching element 19 of the DC power supply circuit C is switched to the switching element 8
In the abnormal state in which the voltage from the commercial AC power supply 1 falls below a predetermined voltage in synchronization with the idle operation or the OFF state, the switching element 8 of the power supply circuit A is switched to the switching element of the DC power supply circuit C, contrary to the above. The switching element may be operated in accordance with the operating state of the power supply circuit A, for example, by making the idle operation or the OFF state in synchronization with 19, and setting the switching element 19 of the DC power supply circuit C in the active state. Here, a dual power supply device is shown, which is configured to output a DC voltage from the DC power supply circuit C to the secondary side DC output circuit B when the output from the power supply circuit A is cut off due to a power failure or the like. For example, the power supply device may be configured by configuring another power supply circuit capable of outputting a voltage of 24V.

As shown in FIGS. 1, 3 and 4, the power supply circuit A, the primary winding N1, the secondary DC output circuit B, the secondary winding N2, the tertiary winding N3, and the power supply circuit. The AC drive side unit 22 is composed of the first radiation fins 21 for radiating the heat generated from the diodes 9 and 11 and the FET 8 which are the components, and the AC drive side unit 22 is housed in the casing 25 and First radiating fin 2
A part of 1 is exposed to the outside through a hole 25A formed in the casing 25, and the heat generated from the DC power supply circuit C and the FET 19 and the reverse current blocking diode 20 which are the components of the DC power supply circuit is radiated. A DC power supply circuit unit 24 is constructed from the heat radiation fins 23, etc., the DC power supply circuit unit 24 is housed in an auxiliary casing 26, and a part of the second heat radiation fins 23 is exposed to the outside through a hole 26A formed in the auxiliary casing 26. A male-female type connecting portion S which is exposed and is capable of connecting and disconnecting both of them to the tertiary winding N3 and the DC power supply circuit C
1, S2 are provided, and the two casings 25, 26 are pulled toward each other in a direction to approach each other, and a screw 27 as a connecting means for bringing the two radiation fins 21, 23 exposed to the outside into a direct contact state. Heat conduction means 28
Are configured. The term "exposed" refers to a state of being exposed from the outside, and may be protruding from the casing 25 or 26, may be flush with the casing 25 or 26, or may be retracted into the casing 25 or 26. You may be in a state of being. Specifically, after inserting the screw 27 into a through hole (not shown) formed in the auxiliary casing 26 and a through hole 23A formed in the second radiating fin 23,
By screwing the screw 27 into the screw hole 21A formed in the first radiating fin 21, the two radiating fins 21 and 23 can be maintained in contact with each other, and at the same time, as shown in FIG.
As shown in (b) and (c), the casings 25 and 26
Are integrated. At this time,
The male connecting portion S2 is fitted into the female connecting portion S1 so that both S1 and S2 are in a connected state. The connecting portions S1 and S2 have two terminals for connecting the tertiary winding N3 and the DC power supply circuit C to form a closed loop circuit,
It consists of three ground terminals for taking the ground line. Although the single screw 27 is used in the drawing, the fins 21 and 23 may be more surely brought into contact with each other by using two or more screws. Further, instead of the screw 27, a locked portion and a locking portion for locking and holding the casings 25 and 26 in an integrated state may be provided in the casings 25 and 26, respectively. In this case, compared with the screw, there is an advantage that the operation for integrating the casings 25 and 26 can be performed quickly. Also, the fin 2
There is an advantage that it is possible to suppress a decrease in thermal conductivity by directly contacting the Nos. 1 and 23,
The fins 21 and 23 may be in a heat conducting state with the casings 25 and 26 interposed. In this case, it is preferable that the casings 25 and 26 are made of a metal such as aluminum having a high thermal conductivity. Reference numeral 29 shown in FIG. 3 is an electric wire for connecting to the battery 3, and reference numeral 30 is a signal wire for inputting and outputting various signals. Also, 31
Is an electric wire for connecting to a commercial AC power source and an electric wire for inputting and outputting various signals. Here, the casings 25, 26
Although the circuit covering the circuit has been described above, the structure without the casings 25 and 26 may be used.

As described above, by placing the radiation fins 21 and 23 in contact with each other, only the power supply circuit A is driven to drive the secondary side DC output circuit B when the commercial AC power supply 1 is in a normal state. In this case, not only the first radiating fins 21 but also the unused second radiating fins 23 can be effectively used to efficiently release the heat generated from the diodes 9 and 11 and the FET 8, and the commercial AC power supply. 1
In the abnormal state, when only the DC power supply circuit C is driven to drive the secondary side DC output circuit B, not only the second radiation fins 23 but also the unused first radiation fins 2
1, the heat generated from the diode 20 and the FET 19 can be effectively released.

The first heat dissipating fin 21 is shown in FIGS.
As shown in (a), the main body portion 21B is fixed to the casing 25 side and is attached with the outer surfaces of the diodes 9 and 11 and the FET 8 (not shown) in contact with each other, and the screw hole 21A. Along with the extending portion 21C that is bent from the main body portion 21B and is exposed to the outside from the casing 25, and the fin portion 21D for increasing the heat radiation area, the shape of the first heat radiation fin 21 is as shown in FIG. Other shapes than those shown in FIG. In addition, the second heat radiation fin 23 is provided in FIG. 3 and FIG.
As shown in FIG. 7, a main body portion 23B fixed to the auxiliary casing 26 side and attached in a state where the outer surfaces of the diode 20 and the FET 19 are in contact with each other, and the main body portion 23.
A plurality of auxiliary fin portions 23C for attaching to B to increase the heat radiation area, and an extension portion that is integrated with the main body portion 23B and extends from the auxiliary casing 26 while being exposed to the outside as described above. It consists of 23D,
The shape of the second radiating fin 23 may be other than the shape shown in the drawing. In FIG. 5B, the separately formed main body portion 23B and the plurality of auxiliary fin portions 23C are integrated, but the main body portion and the auxiliary fin portions are integrally formed (single). You can also do it. Figure 5
K shown in (a) and (b) is a substrate for attaching a conductor which is a leg portion of a circuit component such as the diode 20 and the switching element 19.

As shown in FIGS. 6 (a) and 6 (b) -FIG.
At the end of the casing 25 opposite to the side to which the auxiliary casing 26 is connected, heat generated inside the casing 25 (heat generated from a circuit, heat generated from a circuit component, the first radiating fin 21) A cooling fan F for releasing heat emitted from the cooling fan F to the outside, and a non-removable position and a cooling fan F located in front of the cooling fan F to prevent the cooling fan F from being removed. A slide member H as a protective member is removably attached to the removable position retracted from the front of the cooling fan F to allow the removal of the slide member H. That is, a switch W for power supply for turning on / off the cooling fan F by turning on / off the power supply to the circuits A, B, and C is swingably provided in the casing 25, and this switch W is provided. The slide member H can be repositioned to the removable position only when the plug is turned off and the plug of the pluggable power cord inserted into the input section 25X having three contacts provided in the casing 25 is unplugged. Is configured as follows. FIG. 6 (a),
Reference numeral 25Y shown in (b) and FIG. 8 is a connector for taking out a power failure signal, a signal indicating the charge state of the battery, and the like, but may be omitted. Although the protection member is composed of the slidable slide member H, it may be a rotatable protection member.

The cooling fan F is, as shown in FIG.
A fan main body 33 including a fan portion 31 having a large number of rotating blades and a substantially square frame (any shape such as rectangular or circular shape) 32 for rotationally supporting the fan portion 31, The cover body 34 is made of resin (may be made of metal) and has a plate shape for fixing the fan body 33 in a state of being fitted in the casing 25 while covering the outside of the fan body 33. But the cover body 34
The frame 32 and the frame 32 may be integrated, and the specific configuration of the cooling fan F can be freely changed.
The cover body 34 is formed with a large number of openings 34A for discharging the hot air sucked by the fan portion 31 to the outside.

The switch W is shown in FIG.
It is swingable around the vertical axis at the substantially central portion of its longitudinal direction, and pushed by pushing one of the left and right operation portions 35, 36 located on the left and right with the vertical axis interposed. Although it is configured to swing so that it can be turned on and off by tilting it to the side, any switch such as a slide type switch, a push button type switch or a toggle switch can be used. It may be.

The slide member H has a substantially rectangular frame portion 37 that covers the outside of the switch W, and the cover member 34.
Is integrally formed of a synthetic resin with a stopper portion 38 which is located in front of and which prevents the cover body 34 from moving toward the front side. However, the specific configuration such as the shape can be freely changed. can do. A protruding portion 37B protruding toward the other short side is integrally formed on the inner surface of one of the left and right short sides of the frame portion 37 on the cover body 34 side, and the switch W is in the ON state. Then, the protrusion 37B abuts on the left end surface of the left operation portion 35 of the switch W protruding forward to prevent the slide member H from sliding to the right side, and FIGS. 6 (b) and 7 (b). As shown in FIG. 7, by turning the switch W to the OFF state, the slide member H is moved to the right and the protrusion 37B is positioned in front of the operation portion 35 on the left side of the switch W, so that the switch W can be turned on. It is designed so that you can block it so that it does not exist.
Further, a plate-like protrusion 37C protruding downward is integrally formed at the lower end of the slide member H, and the plug of the inserted power cord must be pulled out from the input portion 25X to the right of the slide member H. In addition to being unable to slide, the sliding slide member H is positioned in front of the input section 25X so that a power cord plug (not shown) cannot be inserted. A through hole 38A into which a screw 39 described later is inserted is formed in the stopper portion 38. In addition, the claw portions 37A and 37A provided on the lower surfaces of the upper and lower side portions of the frame portion 37 are movably fitted into long grooves (not shown) provided in the casing 25, so that the slide member H is illustrated. 6 (a),
As shown in FIG. 7B and FIGS. 7A and 7B, it can be slid in the left and right directions in the drawing.

Explaining the case of exchanging the cooling fan F, first, the switch W is turned off by pushing the operating portion 35 on the left side, and the plug (not shown) of the power cord is pulled out. Allows the cooling fan F
And the power supply to the circuits A, B and C is cut off. Next, the screw 39 screwed into the screw portion 25N formed in the casing 25 is removed, and then the slide member H is slid to the right to a removable position (see FIGS. 6B and 7B). The cover body 34 can be removed by positioning the cover body 34 at. After removing the cover body 34, the cooling fan F is removed from the casing 25 and then replaced with a new cooling fan F (see FIG. 8).
Reference numeral 40 shown in FIG. 8 is an electric wire for supplying power to the cooling fan F. Then, after being replaced with the new cooling fan F and fitted into the casing 25, after fitting the casing 25 while covering the cover body 34 from the outside of the cooling fan F, the slide member H is moved to the left side. After sliding it to the non-removable position (see FIGS. 6A and 7A), the screw 39 is passed through the through hole 38A of the stopper portion 38 and the through hole 34A of the cover body 34 in this order. The cooling fan F and the slide member H can be fixed to the casing 25 by screwing the cooling fan F into the screw portion.
After that, by inserting the plug of the power cord into the input unit 25X and turning on the switch W, the cooling fan F is driven and power is supplied to the circuit.
Here, the cooling fan F can be replaced more safely by performing the two operations of unplugging the power cord and turning off the switch W. However, the plug of the power cord is unplugged. Slide member H only when the switch W is turned off or when the switch W is turned off.
May be removably arranged at a removable position.
Further, by forming the switch W from an ON-OFF switch for power supply for turning on / off the power supply to the circuits A, B, C, it is possible to turn on / off the power supply to the cooling fan F at the same time. Not only can the operability be improved and the number of components can be reduced by also using switches, but also when the cooling fan F is stopped, the circuits A, B, and C are always disconnected. , B,
Although the cooling fan F can be replaced in a state where the power supply to C is always cut off, it has an advantageous structure in terms of safety. The switches of the cooling fan F may be separately configured and implemented.

Auxiliary casing 26 of the casing 25
A large number of holes 25K are formed on both end faces in the connecting direction, and the exhaust fan F for discharging the internal air, which takes in outside air through the holes 25K formed on one end face, to the outside through the holes 25K formed on the other end face. It is provided at a position closer to the other end face of the casing 25. A large number of holes 26K are formed on both end faces of the auxiliary casing 26 in the casing 25 connection direction, and the suction force of the discharge fan F is utilized to form holes 26 on one end face inside the auxiliary casing 26.
The internal air that takes in the outside air through K is moved to the casing 25 side through the hole 26K formed on the other end face, and the internal temperature inside the casings 25 and 26 is efficiently lowered by forced cooling. I am able to

The fixing of the two casings 25 and 26 and the fixing of the two radiating fins 21 and 23 are performed by one screw 27.
By doing so, there is an advantage that the number of parts can be reduced and the fixing operation can be speeded up, but they may be fixed by separate fixing means.

[0025]

According to the first aspect of the present invention, by connecting the power supply circuit and the DC power supply circuit in parallel to the load via the high frequency transformer, a DC-DC converter, a battery, etc. can be connected as in the conventional case. Compared to those provided on the secondary side,
Not only the simplification of the circuit and the miniaturization (space saving) of the device, but also the high efficiency can be realized, and the construction of the power supply device having various functions is of course the assembly work side, It is possible to provide a power supply device that is advantageous in terms of cost, and it is possible to provide a power supply device that is useful for both users and manufacturers. When replacing the cooling fan, the replacement operator should be aware that the cooling fan drive has been completely stopped by turning the cooling fan ON-OFF switch OFF or unplugging the power cord. Therefore, the replacement work can be performed quickly without any risk of injury.

According to the second aspect of the present invention, the heat radiation area can be dramatically increased by bringing the first heat radiation fin and the second heat radiation fin into a heat conducting state with each other, and the heat radiation is less likely to be adversely affected. The power supply device can be realized while suppressing the size increase of the device as much as possible.

According to the fourth aspect of the present invention, a forced air hole is formed in the auxiliary casing and the casing for moving the internal air in the auxiliary casing to the casing side by a single cooling fan. Not only can the internal temperature be lowered efficiently, but the size of the device can be reduced and the cost can be reduced by using the cooling fan as well.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an uninterruptible redundant power supply device.

2A and 2B show the appearance of an uninterruptible redundant power supply unit in which a casing and an auxiliary casing are integrated, FIG. 2A is a plan view thereof, FIG. 2B is a side view thereof, and FIG. It is the front view seen from the casing side.

FIG. 3 is an exploded perspective view showing a state immediately before the auxiliary casing is integrated with the casing.

FIG. 4 is a schematic explanatory view showing a configuration inside two integrated casings.

FIG. 5 shows the shape of the radiation fins in the casing,
(A) is sectional drawing of the casing which shows the shape of a 1st radiation fin, (b) is sectional drawing of a casing which shows the shape of a 2nd radiation fin.

FIG. 6 is a rear view of the casing seen from the cooling fan side, (a) shows a state in which the protective member is positioned in front of the cooling fan, and (b) shows the protective member retracted from the front of the cooling fan. Shows the closed state.

FIG. 7 shows a cross-sectional plan view of the mounting portion of the cooling fan,
(A) shows a state in which the protective member is positioned in front of the cooling fan, and (b) shows a state in which the protective member is retracted from the front of the cooling fan.

FIG. 8 is a perspective view of an essential part showing a state in which a cooling fan is removed.

FIG. 9 is a schematic block diagram showing a specific configuration of a conventional uninterruptible redundant power supply device.

[Explanation of symbols]

1 Commercial AC power supply 2 High frequency transformer 3 Secondary battery (battery) 4 Rectifier circuit 5 Active filter circuit 6 Smoothing capacitor 7 Gate circuit 8 FET (switching element) 10 mag amplifier 11 Commutation diode 12 Smoothing coil 13 Smoothing capacitor 14 Load 15 Control circuit 16 Battery condition monitoring signal circuit 17 Charging circuit 18 Gate circuit 19 FET (switching element) 20 Reverse Current Blocking Diode 21 First Radiating Fin 21A Screw hole 21B Main body 21C extension part 21D fin part 22 AC drive side unit 23 Second radiating fin 23A Through hole 23B Main body 23C Auxiliary fin portion 23D Extension portion 24 DC power supply circuit unit 25 casing 25A, 25K hole 25X input section 25Y connector 25N screw part 26 auxiliary casing 26A, 26K holes 27 Screw means (connecting means) 28 heat conduction means 29 electric wire 30 signal line 31 fan section 32 frame 33 fan body 34 cover body 34A opening 34B Through hole 35, 36 Operation part 37 Frame 37A Claw 37B, 37C Projection part 38 Stopper part 38A Through hole 39 Screw 40 wire 50 converter A power supply circuit B secondary side DC output circuit C DC power supply circuit F Cooling fan H Slide member N1, N2, N3 Winding S1, S2 connection part W switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02M 3/28 H02M 3/28 Y (72) Inventor Yukiki Imanishi 1-3, Nishi-Nagasu-cho, Amagasaki-shi, Hyogo No. 30 Stock company F-term in Nipron (reference) 5E322 BB03 EA11 5G015 FA10 GB01 HA02 JA01 JA52 5H730 AA17 AS01 AS19 AS21 BB23 BB57 BB84 CC01 CC17 DD04 DD26 EE07 EE46 EE59 EE73 FD01 XX03 XX14 ZZ33 ZZ12 ZZ01 ZZ01

Claims (5)

[Claims] 1. A power supply circuit including a rectifier circuit for rectifying AC from a commercial AC power supply and a switching element provided on the output side of the rectifier circuit is connected to a primary side winding of the high frequency transformer, A secondary side DC output circuit that supplies power to the load is connected to the secondary side winding, and both of them can be connected and disconnected to a DC side power supply circuit different from the tertiary side winding of the high frequency transformer and the power supply circuit. A casing for accommodating at least the power supply circuit, the primary side winding, the secondary side DC output circuit, the secondary side winding, and the tertiary side winding, and the heat generated inside the casing to the outside. A cooling fan for discharging is detachably attached, and a non-removable position located in front of the cooling fan to prevent the cooling fan from abutting against the cooling fan and the cooling fan to allow the cooling fan to be removed. Only when the protective member is removably attached to the removable position retracted from the front of the cooling fan, and the switch provided in the casing for turning the cooling fan on and off is turned off,
Alternatively, only when the plug of the pluggable power cord inserted into the input portion provided in the casing for inputting the AC from the commercial AC power source is unplugged, or when the switch is turned OFF and the plug is turned ON. A power supply device characterized in that the protective member can be repositioned to a removable position only when it is removed. 2. A first radiating fin for radiating heat generated from circuit components of the power supply circuit and the secondary side DC output circuit, and a heat radiating heat generated from circuit component of the DC power supply circuit. 2. The power supply device according to claim 1, further comprising a second heat radiation fin, wherein the two heat radiation fins are brought into contact with each other to be in a heat conductive state. 3. The power supply device according to claim 1, wherein the DC power supply circuit includes a switching element that operates in synchronization with a switching element of the power supply circuit or in accordance with an operating state of the power supply circuit. 4. An AC drive side unit is composed of the power supply circuit, the primary side winding, the secondary side DC output circuit, the secondary side winding, the tertiary side winding, and the first radiation fin, and the AC drive side unit. Is housed in the casing, a DC power supply circuit unit is configured from the DC power supply circuit and the second heat dissipation fin, the DC power supply circuit unit is housed in an auxiliary casing different from the casing, and the internal air in the auxiliary casing is The power supply device according to claim 1 or 2, wherein an air guide hole for moving the cooling fan to the casing side is formed in the auxiliary casing and the casing. 5. The power supply device according to claim 1, wherein the circuit components are a diode and the switching element.