JPS644431B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a DC power supply device capable of obtaining an n-fold voltage (where n is a positive integer) based on a DC power supply.

When obtaining high DC voltage based on a DC power supply, generally, as shown in Figure 1, a DC power supply DC, an inverter INV, a step-up transformer Tr, and a rectifier circuit are required.
The circuit configuration consists of RD and load R. Therefore,
A transformer Tr was required, which inevitably made the device large and expensive.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a DC power supply device that can obtain a high voltage with a simplified configuration.

To achieve the above object, the present invention includes a pair of DC power lines, a thyristor bridge circuit connected between the pair of DC power lines, and a gate signal of a series inverter type to the thyristor of the thyristor bridge circuit. at least first and second AC power lines derived from the thyristor bridge circuit; a current holding reactor connected to the current path of the thyristor of the thyristor bridge circuit; a first bridge-type full-wave rectifier circuit comprising four rectifying elements or controlled rectifying elements; and a first bridge-type full-wave rectifying circuit comprising at least four rectifying elements or controlled rectifying elements and connected in series with the first bridge-type full-wave rectifying circuit with the same polarity. a second bridge-type full-wave rectifier circuit connected to each other and having at least two AC input points, the at least two AC input points being connected to the at least first and second AC power lines, respectively; 1st and 2nd
and respective capacitors respectively connected between the AC power supply line of the first bridge type full-wave rectifier circuit and at least two AC input points of the first bridge type full-wave rectifier circuit,
A DC power supply comprising a voltage doubler rectifier circuit configured to obtain a voltage doubler at both ends of a series connection circuit of the bridge type full wave rectifier circuit and the second bridge type full wave rectifier circuit. It is related to equipment.

According to the present invention, the capacitor of the voltage doubler rectifier circuit also functions as a capacitor for driving the thyristor bridge circuit with a series inverter. It is also possible to boost the voltage without using a transformer. Therefore, the DC configuration is simplified, downsized,
Cost reduction becomes possible.

Yet another invention related to the present application relates to a DC power supply device including a voltage doubler rectifier circuit including at least two stages of bridge type full-wave rectifier circuits connected via a capacitor.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 2 showing a DC power supply device including an inverter and a three-phase triple voltage rectifier circuit according to an embodiment of the present invention, a pair of DC power lines 21 and 22 for supplying DC voltage are connected to Thyristors S ₁ ~ S ₆
A thyristor bridge circuit 23 consisting of a three-phase bridge connection is connected, and the first, second, and third AC power lines 1, 2, and 3 derived from this bridge circuit 23 are connected to a three-phase voltage doubler rectifier circuit. It is connected. Note that the first, second, and third AC power lines 1,
2 and 3 are connected in series with first, second, and third current holding reactors 24, 25, and 26.

In order to configure a three-phase voltage doubler rectifier circuit, first,
The first and third AC power lines 1, 2, and 3
Second, third, fourth, fifth, and sixth capacitors
C ₁ , C ₂ , C ₃ , C ₄ , C ₅ , and C ₆ are connected. In addition, the first, second, third, fourth, and sixth rectifying elements D ₁ ,
A first three-phase bridge type full-wave rectifier circuit 4 consisting of D ₂ , D ₃ , D ₄ , D ₅ , D ₆ and a seventh, eighth, ninth, and
10, 11th, and 12th rectifying elements D ₇ , D ₈ , D ₉ ,
A second three-phase bridge type full-wave rectifier circuit 5 consisting of D ₁₀ , D ₁₁ , D ₁₂ and a 13th, 14th, 15th, 16th,
17, and the 18th rectifying element D ₁₃ , D ₁₄ , D ₁₅ , D ₁₆ ,
A third three-phase bridge type full-wave rectifier circuit 6 consisting of D ₁₇ and D ₁₈ is provided, and the first, third and second three-phase
Phase bridge type full-wave rectifier circuits 4, 5, and 6 are connected in series, ie, cascaded, with the same polarity in this order. and,
The three AC input points A ₁ , A ₂ , A 3 of the first three-phase bridge type full-wave rectifier circuit 4 and the three-phase AC power lines 1 , ₂ ,
between the first, second, and third capacitors C ₁ ,
C ₂ and C ₃ are connected, respectively, to three AC input points A ₇ , A ₈ , A ₉ of the third three-phase bridge type full-wave rectifier circuit 6.
Fourth, fifth, and sixth capacitors C ₄ , C ₅ , and C ₆ are connected between the three-phase AC power supply lines 1 , 2 , and 3 . In addition, a second bridge type full-wave rectifier circuit 5
The three AC input points A ₄ , A ₅ , and A ₆ are directly connected to three-phase AC power lines 1 , 2 , and 3 . 1st 3
One (positive) DC output point P ₁ of the phase bridge type full-wave rectifier circuit is connected to the first DC output terminal 7, and the other (negative) DC output point P ₂ is connected to the second three-phase bridge type full-wave rectifier circuit. It is connected to one (positive) DC output point _P3 of the full-wave rectifier circuit 5. Also, the other (negative) DC output point of the second three-phase bridge type full-wave rectifier circuit 5
P ₄ is connected to one (positive) DC output point P ₅ of the third three-phase bridge type full-wave rectifier circuit 6, and is connected to the other (negative) DC output point of the second three-phase bridge type full-wave rectifier circuit 6. The output point P ₆ is connected to the second DC output terminal 8 . Further, in this embodiment, third and fourth DC output terminals 9 and 10 are connected to both ends of the second bridge type full-wave rectifier circuit 5 so that a DC output voltage that is not tripled as required is obtained. has been done.

In the device configured as described above, a pair of DC power supply lines 21 and 22 are connected to a DC power supply, and a well-known gate control circuit 27 connects each thyristor S ₁ to S ₆ at the timings shown by A to F in FIG. 3. When a gate signal for driving a three-phase series inverter is applied, capacitors C ₁ to _{C 6} in the triple voltage rectifier circuit act as capacitors for the series inverter circuit, and the first, second, and third AC power supplies Three-phase AC voltage can be obtained on lines 1, 2, and 3. That is, the thyristors S ₁ and S ₄ are connected at the time t ₀ in FIG. 3, and the thyristors S ₁ and S ₆ are connected at the time t ₁ in FIG.
At t ₂ , thyristors S ₂ and S ₆ , at t ₃ , thyristors S ₃ and S ₂ , and at t ₄ , thyristors S ₅ and S ₂ ,
When a trigger pulse is applied to thyristors S _{5 and} S ₄ at time t 5 and to thyristors S ₁ and S ₄ at time t ₆ , each thyristor S ₁ to S ₆ is substantially controlled at an interval of 2π/3,
Three-phase alternating current can be obtained. This inverter does not perform forced commutation, but allows natural commutation by eliminating the current in capacitors C ₁ to _{C 6} , so for example, t ₀
When a gate pulse is applied to thyristors S ₁ and S ₄ at time t 1 and a gate pulse is applied to thyristors S ₁ and S ₆ at time t ₁ , thyristor S ₁ receives a current i as shown in FIG. 3G. ₁ flows. Note that this current varies depending on the size of the capacitor. Therefore, the capacitances of the capacitors C ₁ to C ₆ are determined so that the current flowing therein becomes zero or less than the holding current of the thyristor within the π/3 period.

The current path during the period when thyristors S ₁ and S ₄ are on is thyristor S ₁ , reactor 24 ,
A circuit consisting of a capacitor C ₁ , a rectifier D ₁ , an output terminal 7, a load (not shown), an output terminal 8, a rectifier D ₁₆ , a capacitor C ₅ , a reactor 25, and a thyristor S ₄ is formed, and the thyristor S ₁ , reactor 24, capacitor C ₄ , rectifying element D ₁₃ , rectifying element D ₁₀ , thyristor 25, and thyristor S ₄ are formed. Therefore, the equivalent circuit of the series type inverter circuit portion in FIG. 2 is shown in FIG. 4. However, C _A , C _B , and C _C are capacitors equivalent to capacitors C ₁ to _{C 6} , and L _A , L _B , and L _C are reactors 24,
25 and 26, and R _A , R _B , and R _C are resistances equivalent to the rectifying elements D ₁ to D ₁₈ and the load.
For this reason, it is desirable to set the capacitances of capacitors C ₁ to _{C 6} to be equal in FIG. 2, and to set the inductance values of reactors 24 to 26 to be equal to each other.

Thyristor S ₁ of thyristor bridge circuit 23 ~
When S ₆ is driven by a series inverter method and three-phase AC is supplied to the three-phase triple voltage rectifier circuit with a maximum potential difference of E volts between each line, the first DC output terminal 7
+3/2 E volts to 2nd DC output terminal 8, -3/2 to 2nd DC output terminal 8
E volts are generated, and a voltage of 3E volts (three times the voltage) is obtained between the first and second DC output terminals 7 and 8. Further, a voltage of 2E volts (voltage doubler) is applied between the first DC output terminal 7 and the fourth DC output terminal 10.
is obtained. Next, this will be explained in detail. now,
If the voltage of the first AC power line 1 is higher than that of the second AC power line 2 by E volts, then the first AC power line 1, the seventh rectifier D ₇ , and the fourth rectifier A circuit consisting of an element D ₄ , a second capacitor C ₂ , and a second AC power line 2.
C ₂ is charged to E volts, and the first AC power supply line 1, the fourth capacitor C ₄ and the thirteenth rectifier
D ₁₃ , a tenth rectifying element D ₁₀ , and a second AC power line 2, the fourth capacitor C ₄ is E
Volt is charged. This kind of operation occurs in other phases as well, and the remaining capacitors C ₁ , C ₃ ,
C ₅ and C ₆ are similarly charged to E volts.

Once charging of capacitors C ₁ to C ₆ is completed, the first
The equivalent circuit showing the voltages at the second output terminals 7 and 8 is shown in FIG. 5. For example, if the potential of the first AC power line 1 is E volt higher than the potential of the second AC power line 2, , first AC power supply line 1, first capacitor C ₁ , first rectifier D ₁ , first DC output terminal 7, second DC output terminal 8, sixteenth rectifier D ₁₆ , fifth rectifier A circuit is formed consisting of the capacitor C ₅ and the second AC power supply line 2, and the DC output terminals 7 and 8
Between the power supply voltage E volts and the first capacitor
E volts of charging voltage of C ₁ and fifth capacitor C ₅
A voltage 3E is generated which is the sum of the charging voltage and E volts. Also, at this point, the seventh rectifier D ₇ and the fourth
Since a circuit is formed consisting of the rectifying element D ₄ and the second capacitor C ₂ , if the voltage of the second capacitor C ₂ is low, it is charged to E volts. Further, the fourth capacitor C ₄ is also charged to E volts in the circuit including the fourth capacitor C ₄ , the 13th rectifier D ₁₃ , and the 10th rectifier D ₁₀ .

Therefore, at the point in time when the voltage of the first AC power line 1 is higher than the voltage of the second AC power line 2, the output terminals 7,
Smoothing capacitor connected between 8 (not shown)
Even if a current flows through the load (not shown) and the charging voltage of the first capacitor C ₁ and the fifth capacitor C ₅ decreases, the voltage of the second AC power line 2 remains the same as that of the first AC power line 2. When the voltage becomes E volts higher than the voltage of the power supply line 1, it is charged again to E volts.

Since each phase operates as described above, a three-phase full-wave rectified output voltage as shown in FIG. 6 is obtained between output terminals 7 and 8, and the maximum value of this DC output voltage is 3E volts. Further, the voltage between the first DC output terminal 7 and the fourth DC output terminal 10 is, for example, the first AC power supply line 1, the first capacitor C ₁ , the first rectifying element D ₁ , the first DC 2E volts are generated in the circuit consisting of the output terminal 7, the fourth DC output terminal 10, the tenth rectifying element _D10 , and the second AC power line 2.

As is clear from the above, according to this example,
Since capacitors C ₁ to _{C 6} of the voltage doubler rectifier circuit are used as capacitors for the series inverter without providing a special capacitor for the series inverter, the configuration of the device can be simplified.
It becomes possible to reduce the size and cost.

Further, since it is possible to obtain a high voltage without providing an output transformer of the inverter and an input transformer of the rectifier circuit, it is also possible to reduce the size and cost.

In addition, since an n-fold voltage is obtained by three-phase full-wave rectification, the ripple in the output voltage is reduced, and even when a smoothing capacitor is not connected between output terminals 7 and 8, the output voltage has good smoothness. can be obtained. Furthermore, when a smoothing circuit is provided, the capacitors and the like of the smoothing circuit can be made smaller.

Furthermore, it becomes possible to use an electrolytic capacitor with a large capacitance, and it becomes easy to create a large-capacity (for power) n-fold voltage circuit.

Next, FIGS. 7 to 1 show another embodiment of the present invention.
Let's talk about Figure 0. However, in these drawings, portions that are substantially the same as those in FIGS. 2 to 6 are designated by the same reference numerals, and description thereof will be omitted. Also, since the front stage part of the AC power supply lines 1 to 3 is the same as the circuit consisting of the bridge circuit 23 and reactors 24 to 26 in FIG. 2, illustration and explanation thereof will be omitted, and only the voltage doubler rectifier circuit part will be explained. .

In the triple voltage rectifier circuit of another embodiment shown in FIG. 7, controlled rectifiers, ie, thyristors T1 to T, are used instead of the uncontrolled rectifiers _D1 to _D6 of FIG _{. 2} to control the output voltage. ₆ is connected, and the rectifying element D ₁₃ ~
Thyristors _T13 to _T18 are connected instead of _D18 . Further, a first 3-phase bridge type full-wave rectifier circuit 5 is connected between the negative side output point P ₂ of the first 3-phase bridge type full-wave rectifier circuit 4 and the positive side output point P ₃ of the second 3-phase bridge type full-wave rectifier circuit 5. A smoothing reactor L ₁ is connected, as well as a DC output point
A smoothing reactor _L2 is connected between _P4 and the DC output point _P5 . Also, the first to sixth capacitors
Bipolar capacitors are used for C ₁ to _{C 6} .

In the circuit configured as described above, when the first bridge type full-wave rectifier circuit 4 is controlled at the control angle α ₁ , the voltage between both terminals is Eα ₁ , and the voltage between the third bridge type full-wave rectifier circuit 6 is Eα 1 . The voltage between these two terminals when controlled by the control angle α ₂ is Eα ₂ , and the full-wave rectifier circuit 4 when configured with diodes and uncontrolled rectifiers D ₁ to D ₁₂ as shown in FIG. , 5, if the output voltage is Ed ₀ , then
A voltage of Ed ₀ cosα ₁ +Ed ₀ +Ed ₀ coα ₂ is obtained between the output terminals 7 and 8 in FIG.

Further, in the circuit shown in FIG. 7, thyristors T ₁ , T ₃ , T ₅ are controlled with a control angle α ₁ , thyristors T ₂ , T ₄ , T ₆ are controlled with a control angle α ₂ , and thyristors T ₁₃ , T ₁₅ , When T ₁₇ is controlled with a control angle α ₃ and thyristors T ₁₄ , T ₁₆ , and T ₁₈ are controlled with a control angle α ₄ , Ed ₀ /2cosα ₁ + Ed ₀ /2cosα ₂ + Ed ₀ + Ed ₀ /2cosα ₃ +
An output voltage of Ed ₀ /2cosα ₄ is obtained. In addition, the rectifying element D ₇ in Fig. 7
It is of course possible to use ~ _D12 as a thyristor. In addition, reactors L ₁ and L ₂ are used as reactors 24, 25, and 26 in Fig. 2, and reactor 2
4 to 26 may be omitted.

FIG. 8 shows a three-phase voltage doubler rectifier circuit according to yet another embodiment. In this embodiment, in order to bring the waveform of the input current flowing through the three-phase AC power lines 1, 2, and 3 closer to a sine wave, a first bridge-type full-wave rectifier circuit 4 and a second bridge-type full-wave rectifier circuit 5 are used. A first smoothing reactor L ₁ is connected between them, and a second smoothing reactor L 2 is connected between the second bridge type full wave rectifier circuit 5 and the third bridge type full wave rectifier circuit ₆ .
A third smoothing reactor L ₃ is connected between the DC output point P ₁ and the output terminal 7. Therefore, in this embodiment, the reactors 24, 25, and 26 shown in FIG. 2 can be omitted, and the reactors L ₁ , L ₂ , and L ₃ are
- Performs 26 functions.

FIG. 9 shows a three-stage configuration of five stages according to yet another embodiment.
This figure shows a phase full-wave quintuple voltage rectifier circuit. In this embodiment, in addition to the circuit shown in FIG.
Bridge type full-wave rectifier circuits 12 and 13 are connected in cascade. That is, five rectifier circuits 4, 5, 6, 1
2 and 13 are connected in cascade to form a five-stage configuration. The fourth bridge-type full-wave rectifier circuit 12 consists of six rectifying elements _D19 to _D24 , each of which has an AC input point.
_{Seventh , eighth ,} and ninth capacitors _{C 7} , _{C 8} , C ₉ are connected respectively,
This positive DC output point P ₁₁ is connected to the output terminal 14, and this negative DC output point P ₁₂ is connected to the lower DC output point
Connected to _P1 . Further, the fifth bridge type full-wave rectifier circuit 13 consists of six rectifier elements D ₂₅ to D ₃₀ , and each AC input point A ₁₄ , A ₁₅ , A ₁₆ and each AC input point of the upper rectifier circuit 6 10th, 11th, and 12th capacitors C ₁₀ between points A ₇ , A ₈ , and A ₉ ,
C ₁₁ and C ₁₂ are connected respectively, and this positive DC output point
_P13 is connected to the DC output point _P6 of the upper rectifier circuit 6, and this negative DC output point _P14 is connected to the DC output terminal 15.
It is connected to the.

Even with the circuit configured in this manner, a voltage similar to that shown in FIG. 2 can be obtained between the terminals 7 and 8.
That is, the voltage E ₇₀ between the output terminal 7 and the neutral point is:
It changes as shown in FIG. Furthermore, this voltage E ₇₀
is the value obtained by adding the maximum of each phase voltage e _a , e _b , e _c of the AC power supply to E. On the other hand, AC power line 1,
Since each phase voltage e _a , e _b , e _c of 2 and 3 changes as shown in FIG. , in Fig. 10
A potential difference as shown by E _7e is created, which is applied across the series circuit of capacitors C ₇ -C ₉ and capacitors C ₁ -C ₃ . Then, the capacitors C ₁ to _{C 3} are charged to E volts, and the capacitors C ₇ to C ₉ are also charged to E volts. For example, the voltage across the series circuit of capacitor C ₁ and capacitor C ₂ becomes 2E.
Therefore, for example, the potential of the first AC power line 1 is
When the potential of the AC power line 2 is E volt higher than the potential of the AC power line 2, the voltage E from the power supply, the voltage 2E from the capacitors C ₁ and C ₇ , and the capacitor are connected between the output terminals 14 and 15.
A voltage 5E which is the sum of the voltage 2E of C ₁₁ and C ₅ appears.
Since the voltage of this 5E is a three-phase full-wave rectified output, ripples are small. FIG. 11 shows a voltage doubler rectifier circuit according to yet another embodiment of the present invention. This circuit has a configuration in which the second bridge type full-wave rectifier circuit 5 in the voltage doubler rectifier circuit of FIG. 2 is omitted. Therefore, the second bridge-type full-wave rectifier circuit 6 in this circuit corresponds to the third bridge-type full-wave rectifier circuit 6 in FIG.
This voltage doubler rectifier circuit is also an equivalent circuit similar to that shown in FIG. 5, and each capacitor C ₁ to C ₆ is charged with a voltage of 1/2E, and an output voltage of 2E is obtained. Further, the entire equivalent circuit including the inverter is the same as that in FIG. 4. Therefore, exactly the same effect as the circuit shown in FIG. 2 can be obtained. It should be noted that the same effect can be obtained even if the circuit configuration shown in FIGS. 7, 8, and 9 is omitted from the second bridge type full-wave rectifier circuit 5.

Although various embodiments of the present invention have been described above, the present invention is not limited to these.
It is also deformable. For example, a full-wave rectifier circuit may be further connected in cascade to the full-wave rectifier circuits 4, 5, 6, 12, and 13, and a capacitor may be connected in the same manner to form an n-fold voltage rectifier circuit of 5 times or more.
Further, in FIG. 2, the third bridge type full wave rectifier circuit 6 may be omitted and only the first and second bridge type full wave rectifier circuits 4 and 5 may be provided to form a double voltage rectifier circuit. Furthermore, it is of course possible to configure an n-fold voltage rectifier other than the three-phase one. In addition, the rectifying elements D ₁ , D ₂ , D ₃ ,
A circuit configuration may be adopted in which D ₁₄ , D ₁₆ , and D ₁₈ are replaced with thyristors. In addition, the rectifying elements D ₁ to _{D 6} in FIG.
A thyristor may be connected in place of _D13 to _D30 , and a smoothing reactor may be connected between each stage.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a conventional DC voltage supply device, Fig. 2 is a circuit diagram showing a triple voltage rectifier according to an embodiment of the present invention, and Fig. 3 shows the output of the gate control circuit and thyristor of Fig. 2. 4 is an equivalent circuit diagram of the series type inverter part of FIG. 2, FIG. 5 is an equivalent circuit diagram showing the voltage between output terminals 7 and 8 of FIG. 2, and FIG. 6 is a waveform diagram showing the current of FIG. is a waveform diagram showing the output voltage of the circuit of FIG. 2, FIG. 7 is a circuit diagram showing a triple voltage rectifier circuit according to another embodiment, and FIGS. A circuit diagram showing a phase voltage doubler rectifier circuit, and FIG. 10 is a waveform diagram explaining the operation of the circuit of FIG. 9. FIG. 11 is a circuit diagram showing a modification of the voltage doubler rectifier circuit shown in FIG. 2. In the symbols used in the drawings, 1 is the first AC power line, 2 is the second AC power line, 3 is the third AC power line, and 4 is the first three-phase bridge type full wave. Rectifier circuit, 5 is a second three-phase bridge type full-wave rectifier circuit, 6 is a third three-phase bridge type full-wave rectifier circuit, 7
is a first DC output terminal, 8 is a second DC output terminal, 9 is a third DC output terminal, 10 is a fourth DC output terminal, 21 and 22 are DC power lines, 23 is a thyristor bridge circuit, 24 to 26 are reactors,
27 is a gate control circuit, C ₁ to C ₆ are capacitors,
D ₁ to _{D 18} are rectifying elements, P ₁ to _{P 6} are DC output points, A ₁ to
_A9 is the AC input point.

Claims (1)

[Claims] 1: a pair of DC power lines; a thyristor bridge circuit connected between the pair of DC power lines; and a gate that supplies a series inverter type gate signal to the thyristor of the thyristor bridge circuit. a control circuit; at least first and second AC power lines derived from the thyristor bridge circuit; a current holding reactor connected to the current path of the thyristor of the thyristor bridge circuit; and at least four rectifiers. a first bridge-type full-wave rectifier circuit consisting of an element or a controlled rectifying element; and a first bridge-type full-wave rectifier circuit consisting of at least four rectifying elements or controlled rectifying elements and connected in series with the first bridge-type full-wave rectifier circuit with the same polarity; a second bridge-type full-wave rectifier circuit having at least two AC input points, the at least two AC input points being connected to the at least first and second AC power lines, respectively; at least two of the second AC power supply line and the first bridge type full-wave rectifier circuit;
each capacitor connected between the two AC input points, and connected to both ends of the series connection circuit of the first bridge type full wave rectifier circuit and the second bridge type full wave rectifier circuit. A DC power supply device comprising a voltage doubler rectifier circuit configured to obtain a voltage doubler. 2. The DC power supply device according to claim 1, wherein the reactor is a reactor directly connected to the first and second AC power lines. 3 a pair of DC power lines, a thyristor bridge circuit connected between the pair of DC power lines, a gate control circuit that supplies a series inverter type gate signal to the thyristor of the thyristor bridge circuit, and the thyristor. At least first and second AC power lines derived from the bridge circuit, a power supply holding reactor connected to the current path of the thyristor of the thyristor bridge circuit, and at least four rectifying elements or controlled rectifying elements. a first bridge-type full-wave rectifier circuit consisting of a first bridge-type full-wave rectifier circuit; and a second bridge-type full-wave rectifier circuit comprising at least four rectifier elements or controlled rectifier elements and connected in series with the first bridge-type full-wave rectifier circuit with the same polarity. a rectifier circuit; respective capacitors respectively connected between at least the first and second AC power lines and respective AC input points of the first bridge type full-wave rectifier circuit; each capacitor connected between a second AC power supply line and each AC input point of the second bridge type full wave rectifier circuit, the first bridge type full wave rectifier circuit A DC power supply device comprising a voltage doubler rectifier circuit configured to obtain a voltage doubler at both ends of a series connection circuit of the second bridge-type full-wave rectifier circuit and the second bridge type full-wave rectifier circuit.