JP2014011835A - Rectifier circuit for power generation system for distributed power sources - Google Patents

Abstract

In a permanent magnet generator of a power generator for a distributed power source having a plurality of insulated windings driven by a windmill or a water turbine, a winding having a large number of windings generates a high voltage, so that the withstand voltage is reduced. There was a problem that had to be strengthened.
In a rectifier circuit of a power generator for a distributed power source that obtains an approximate maximum output of a wind turbine or water turbine regardless of the flow velocity of wind or water, a first winding of a permanent magnet generator having a plurality of windings built therein Are connected to the first rectifier via the output terminal and the first reactor, are connected to the second rectifier via the output terminal of the second winding and the second reactor, and are further connected to the output of the second winding. A terminal and a capacitor to be connected to a voltage doubler rectifier circuit, a DC output of the voltage doubler rectifier circuit and a DC output of the second rectifier are connected in parallel via a reflux prevention diode, and the first rectifier A rectifier circuit for a power generator for a distributed power source that connects the DC outputs of the two in parallel.
[Selection] Figure 1

Description

  The present invention relates to a rectifier circuit for a power generator for a distributed power source for taking out a rough maximum output obtained from wind or water from a permanent magnet generator driven by a wind turbine or a water turbine, regardless of wind speed or flow velocity. The present invention relates to a rectifier circuit of a power generator for a distributed power source that performs constant voltage charging without using a PWM converter.

  In order to extract the approximate maximum output from different flow rates from a permanent magnet generator connected to a windmill or water turbine, a plurality of insulated windings that generate different magnitudes of induced voltage values of the permanent magnet generator There is a rectifier circuit for a power generator for a distributed power source in which a rectifier is connected in series to a AC output terminal via a reactor, and the DC outputs of these rectifiers are connected in parallel and output to the outside. (For example, refer to FIG. 1 of Patent Document 1 described later.)

  Such a first conventional example will be described in detail with reference to a main circuit connection diagram showing a rectifier circuit of a power generator for a distributed power source connected to the wind turbine of FIG.

  In FIG. 10, 1 is a windmill, 2 is a rectifier circuit of the above-described conventional distributed power generator, 3 is a permanent magnet generator, 4, 5 are first and second reactors, and 61 and 62 are first and second reactors. The second rectifiers 9, 10 and 10 are output terminals of the first and second windings, 11 is a positive output terminal, 12 is a negative output terminal, and 13 is a battery.

  In FIG. 10, the permanent magnet generator 3 includes two types of windings, a first winding W <b> 1 and a second winding W <b> 2 that are insulated from each other and that generate different induced voltage values. The AC output of the first winding is connected to the first reactor 4 via the output terminal 9 of the first winding, and further connected to the first rectifier 61 in series.

  The AC output of the second winding is connected to the second reactor 5 via the output terminal 10 of the second winding, and further connected to the second rectifier 62 in series.

  The DC side of each of the first rectifier 61 and the second rectifier 62 is connected to the positive output terminal 11 and the negative output terminal 12, and the total output of each winding is charged in the battery 13.

  A method of obtaining an approximate maximum wind turbine output from the rectifier circuit 2 of the power generator for a distributed power source configured as described above will be described below.

  In the wind turbine, when the shape of the wind turbine and the wind speed V are determined, the wind turbine output P with respect to the wind turbine rotation speed N is uniquely determined. For example, the windmill output P with respect to the wind speeds Vx and Vy is as shown in FIG. And the maximum value of the windmill output P with respect to each wind speed becomes like the windmill maximum output curve Pt shown in FIG.

  That is, in order to obtain the maximum output from the wind, once the wind turbine rotation speed N is determined, the input P of the permanent magnet generator 3 at that time may be uniquely set to a value on the maximum output curve Pt. Represents.

  FIG. 5 is an explanatory diagram in the case where the DC output of the rectifier circuit 2 of the distributed power generator targeted by the first conventional example is connected to a constant voltage source such as a battery. In the following description, the wind turbine output and the input of the permanent magnet generator 3 are equal, and the loss of the generator loss (for example, copper loss) is considered.

  Each output of the first and second windings wound in the permanent magnet generator 3 of the rectifier circuit 2 of the rectifier circuit 2 for the distributed power source is different in the induced voltage value of each winding, each winding internal inductance and each output. Due to the voltage drop due to the reactor connected to the terminal, P1 and P2 shown in the wind turbine rotation speed vs. output characteristics of FIG. 5 are obtained.

  When the wind turbine rotational speed N is low, the induced voltage value of the first and second windings in the permanent magnet generator 3 is lower than the battery voltage Vb, so the battery 13 is not charged.

  When the wind turbine rotation speed N increases and reaches the vicinity of the wind turbine rotation speed N2 in FIG. 5, the current starts to flow through the second winding, and as the wind turbine rotation speed N increases, the current increases, and the output by the second winding Becomes like P2. At this time, even if the wind turbine rotation speed N increases and the induced voltage increases, the battery voltage is substantially constant, but the inductance of the second winding and the impedance of the second reactor 5 are proportional to the frequency. At the same time, the output P2 only increases gradually.

  Although the output of the first winding can be increased by further increasing the wind turbine rotation speed N, a large output can be obtained because the internal inductance of the first winding and the first reactor 4 are small.

  The output to the constant voltage source such as the battery of the rectifier circuit 2 of the rectifier circuit 2 of the distributed power generator configured as described above is the first and second in the permanent magnet generator 3 as shown by the dotted line in FIG. The total output obtained by adding the outputs P1 and P2 of the windings, and is substantially the same as the maximum output curve Pt.

  Further, as a second conventional example, the AC output of the winding of a permanent magnet type generator constituted by a plurality of insulated windings driven by a windmill or a water turbine and generating different induced voltage values is converted into an individual rectifier. In the DC output circuit of the power generator for a distributed power source that rectifies and outputs the DC output of the individual rectifiers in parallel, the windings that generate a low induced voltage value among the plurality of windings A reactor series rectifier circuit that connects the individual rectifiers via a reactor to an output terminal, and connects the individual rectifiers via a reactor to an output terminal of a winding that generates a high induced voltage value among the plurality of windings; A capacitor series rectifier circuit that connects the individual rectifiers via a capacitor is connected in parallel, and an inductive impedance due to an internal inductance of the winding that generates the high induced voltage value and the There is a rectifier circuit for a power generator for a distributed power source in which a series combined impedance with a capacitive impedance by a capacitor becomes a capacitive impedance within a rated rotational speed range of the permanent magnet generator (for example, a patent document described later) 2 FIG. 1).

  Such a second conventional example will be described in detail with reference to a main circuit connection diagram showing a rectifier circuit of a power generator for a distributed power source connected to the wind turbine of FIG.

  In FIG. 11, 7 is a capacitor, 63 is a third rectifier, and the same numbers as those in FIG. 10 represent the same components.

  In FIG. 11, the permanent magnet generator 3 includes two types of windings, a first winding W <b> 1 and a second winding W <b> 2 that are insulated from each other and that generate different induced voltage values. The first reactor 4 is connected to the output terminal 9 of the first winding, and the first rectifier 61 is further connected in series. A second reactor 5 and a second rectifier 62 are connected in series to the output terminal 10 of the second winding. Furthermore, the capacitor 7 and the third rectifier 63 are connected in series to the output terminal 10 of the second winding. The direct current outputs of the first rectifier 61, the second rectifier 62 and the third rectifier 63 are connected in parallel, and the total direct current output is charged to the battery 13.

  The combined impedance of the inductive impedance due to the internal inductance of the second winding and the capacitive impedance due to the capacitor 7 connected in series becomes the capacitive impedance within the rated rotational speed range of the permanent magnet generator 3. To design. By designing in this way, when the rotational speed of the wind turbine exceeds a certain value, an AC current in which the effective current to the battery 13 and the phase-advanced current due to the capacitive impedance are added in vector flows through the second winding. .

  FIG. 8 is an explanatory diagram of a case where the DC output of the rectifier circuit 2 of the distributed power generator targeted by the second conventional example is connected to a constant voltage source such as a battery. In the following description, the wind turbine output and the input of the permanent magnet generator 3 are equal, and the loss of the generator loss (for example, copper loss) is considered.

  When the wind turbine rotational speed N is low, the induced voltage value of the second winding is lower than the battery voltage Vb, so the battery 13 is not charged. When the wind turbine rotational speed N rises and reaches the wind turbine rotational speed N2, current starts to flow through the second reactor 5 and the second rectifier 62, and the DC output of the second rectifier 62 becomes PL. At this time, since the impedance of the capacitor 7 is large, the DC output PC of the third rectifier 63 flowing through the capacitor 7 is small.

  When the wind turbine rotational speed N increases, the frequency and induced voltage of the permanent magnet generator 3 increase. However, since the impedance is proportional to the frequency due to the internal inductance of the second winding and the second reactor 5, the DC output PL gradually increases. However, since the impedance of the capacitor 7 decreases in proportion to the frequency, the DC output PC increases in combination with the increase of the induced voltage.

  When the wind turbine rotation speed N increases and becomes greater than or equal to the wind turbine rotation speed N1, the first winding having a small internal inductance or the like starts to obtain a large output. Therefore, the outputs of the first and second windings of the permanent magnet generator 3 are the difference between the induced voltage values of the windings, and the voltage generated by the reactors or capacitors connected to the internal inductances of the windings and the output terminals. Due to the descent, P1 and P2 shown in the wind turbine rotation speed versus output characteristics of FIG. 8 are obtained.

  The output to the constant voltage source such as a battery of the rectifier circuit 2 of the distributed power generator configured as described above is the first and second outputs in the permanent magnet generator 3 as shown by the dotted line in FIG. Is the total output obtained by adding the outputs P1 and P2 of the windings, and is substantially the same as the maximum output curve Pt.

JP 2006-238539 A JP 2007-288754 A

  However, in the rectifier circuit 2 of the power generator for a distributed power source of the first conventional example configured as described above, in order to take out the output along the wind turbine maximum output from the low rotational speed region, The number of turns must be increased. Therefore, the second winding having a large number of turns has a problem that the withstand voltage of the second winding in the permanent magnet generator 3 must be strengthened in order to generate a large induced voltage value.

  In addition, since the reactor is connected to the output terminals of the two types of windings of the permanent magnet generator 3, the interlinkage magnetic flux with the generator winding due to the lag current, and thus the generator induced voltage is reduced. There was a problem. For this reason, there is a region where the windmill maximum output curve Pt and the approximate output curve Ps greatly deviate from each other, and there is a problem that an output along the maximum output curve cannot be obtained from the windmill or the water turbine.

  In the second conventional example, conversely, with respect to the problem of a decrease in the generator induced voltage, it is possible to increase the linkage flux and thus the generator induced voltage. However, in order to take out the output along the wind turbine maximum output from the low rotation speed region, the second winding needs to generate a large induced voltage value as in the first conventional example. Therefore, there is a problem that the withstand voltage of the second winding in the permanent magnet generator 3 must be strengthened.

  The present invention has been made in view of the above problems, and is a distributed power generator for a distributed power source that obtains a rough maximum output of a wind turbine or a water turbine without strengthening the dielectric strength of the windings in the permanent magnet generator 3. The purpose is to improve the output of the rectifier circuit.

  According to the first aspect of the present invention, in the rectifier circuit of the power generator for a distributed power source, which obtains the approximate maximum output of the wind turbine or the water turbine regardless of the flow velocity of the wind or water from the permanent magnet generator driven by the wind turbine or the water turbine. The first winding of the permanent magnet generator is connected to the first rectifier via the output terminal of the first winding and the first reactor, and the second winding of the permanent magnet generator is connected. The line is connected to the second rectifier via the output terminal of the second winding and the second reactor, and the second winding is doubled via the output terminal of the second winding and the capacitor. Connected to a rectifier circuit, the DC output of the voltage doubler rectifier circuit and the DC output of the second rectifier are connected in parallel via a reflux prevention diode, and the DC output of the first rectifier is further connected in parallel Rectifying circuit of distributed power generator .

  According to the invention of claim 2, the voltage doubler rectifier circuit has a capacitor connected in series to the output terminal of the second winding of the permanent magnet generator, and a third rectifier is connected via the capacitor. A phase of an arbitrary winding connected to the third rectifier is connected to a midpoint of a series capacitor circuit connected in parallel to the DC output side of the third rectifier, Connect the positive connection point of the second rectifier to the cathode side on the positive side of the DC output of the voltage rectifier circuit, and connect the first reflux prevention diode in series to the negative side of the DC output of the voltage doubler circuit. 2. The rectifier circuit for a power generator for a distributed power source according to claim 1, wherein a negative connection point of the second rectifier is the anode side, and a second reflux prevention diode is connected in series.

  According to the invention of claim 3, in the rectifier circuit of the power generator for a distributed power source, which obtains the approximate maximum output of the wind turbine or the water turbine regardless of the flow velocity of the wind or water from the permanent magnet generator driven by the wind turbine or the water turbine. The rectifier circuit that starts charging at a low wind turbine speed is configured by the voltage doubler rectifier circuit and the first rectifier circuit, with one type of winding in the permanent magnet generator as one type of winding. The positive side of the DC output of the voltage rectifier circuit is the anode side, and a reflux prevention diode is connected in series. The negative side of the DC output of the voltage doubler rectifier circuit is the cathode side, and the reflux prevention diode is connected in series. A rectifier circuit for a power generator for a distributed power source, wherein a DC output of the voltage doubler rectifier circuit to which a prevention diode is connected and a DC output of the first rectifier circuit are connected in parallel.

  In the rectifier circuit of the power generator for a distributed power source according to the present invention, the second winding, which can be configured with a thin winding of the permanent magnet generator 3, is connected to the voltage doubler rectifier circuit, so Even when the number N is low, the induced voltage of the second winding that can charge the battery 13 can be halved. Therefore, it is not necessary to strengthen the withstand voltage of the second winding, so that the price of the distributed power generator can be reduced. Furthermore, the approximate maximum output obtained from wind or water can be taken out.

It is a main circuit connection diagram for demonstrating the rectifier circuit of the generator device for distributed power supplies of Example 1 of this invention. It is a main circuit connection diagram for demonstrating the rectifier circuit of the generator device for distributed power supplies of Example 2 of this invention. It is explanatory drawing about the DC output of each rectifier circuit at the time of connecting the DC output of the rectifier circuit of the power generator for distributed power supplies of Example 1 of this invention to constant voltage sources, such as a battery. FIG. 3 is an explanatory diagram showing a total output when the direct current output of the rectifier circuit of the power generator for a distributed power source according to the first embodiment of the present invention is connected to a constant voltage source such as a battery. It is explanatory drawing about the direct current output of each rectifier circuit at the time of connecting direct current output of the power generator for distributed power supplies of the 1st conventional example to constant voltage sources, such as a battery. It is explanatory drawing for the total output at the time of connecting the direct current output of the generator for distributed power sources of a 1st prior art example to constant voltage sources, such as a battery. It is a figure explaining the outline | summary of a windmill rotation speed versus windmill output characteristic when the wind speed which concerns on this invention and the 1st and 2nd prior art example is made into a parameter. It is explanatory drawing about the direct current output of each rectifier circuit at the time of connecting the direct current output of the power generator for distributed power supplies of the 2nd conventional example to constant voltage sources, such as a battery. It is explanatory drawing about the total output at the time of connecting the DC output of the power generator for distributed power supplies of the 2nd prior art example to constant voltage sources, such as a battery. It is a main circuit connection diagram of the power generator for distributed power supplies of the 1st conventional example. It is a main circuit connection diagram of the power generator for distributed power supplies of the 2nd conventional example.

  An output terminal of a first winding of a permanent magnet generator having a plurality of windings therein, in a rectifier circuit of a power generator for a distributed power source that obtains an approximate maximum output of the wind turbine or the water turbine regardless of the flow velocity of the wind or water; Connected to the first rectifier via the first reactor, connected to the output terminal of the second winding and the second rectifier via the second reactor, and further connected to the output terminal of the second winding and the capacitor And then connecting to the voltage doubler rectifier circuit, connecting the DC output of the voltage doubler rectifier circuit and the DC output of the second rectifier in parallel via a reflux prevention diode, and further connecting the DC output of the first rectifier It is the rectifier circuit of the power generator for distributed power supplies connected in parallel.

  FIG. 1 is a main circuit connection diagram illustrating a rectifier circuit of a power generator for a distributed power source that is driven by a windmill when the present invention is applied to the windmill.

  In the figure, 81 is a voltage doubler rectifier circuit, 111 is a positive connection point of the second rectifier 62 and the voltage doubler rectifier circuit 81, 112 is a negative connection point of the second rectifier 62 and the voltage doubler rectifier circuit 81, 601 , 602 are first and second reflux preventing diodes, and the same reference numerals as those in FIGS. 10 and 11 denote the same components. The rectifier circuit 2 of the power generator for a distributed power source according to the present invention includes a permanent magnet generator, first and second reactors, capacitors, first to third rectifiers, first to second voltage doubler capacitors, The first and second reflux preventing diodes, a positive output terminal, and a negative output terminal.

Hereinafter, FIG. 1 will be described.
The output of the first winding is output to the battery 13 via the output terminal 9 of the first winding, the first reactor 4 and the first rectifier 61 as in the conventional example.

  The output of the second winding is output from the output terminal 10 of the second winding to the battery 13 via the two DC output circuits. Hereinafter, two DC output circuits of the second winding will be described.

  The first DC output circuit of the second winding has a second reactor 5 connected in series to the output terminal 10 of the second winding, and a second rectifier in series with the second reactor 5. 62 is connected. The DC output is output to the battery 13 via the output terminal 10 of the second winding, the second reactor 5 and the second rectifier 62.

The second DC output circuit of the second winding is configured as follows.
The capacitor 7 is connected in series to the output terminal 10 of the second winding, the third rectifier 63 is connected in series to the capacitor 7, and the second winding connected to the third rectifier 63 is connected. One phase is connected to the midpoint S of the series capacitor circuit 16 connected in parallel to the DC output side of the third rectifier. The series capacitor circuit 16 is configured by connecting a first voltage doubler capacitor 14 and a second voltage doubler capacitor 15 in series. The third rectifier 63 and the series capacitor circuit 16 constitute a voltage doubler rectifier circuit 81.

  The second DC output circuit of the second winding configured as described above is output to the battery 13 via the output terminal 10 of the second winding, the capacitor 7, and the voltage doubler rectifier circuit 81.

  Here, the DC output of the voltage doubler rectifier circuit 81 is the same as that of the first anti-reflux diode 601 and the second rectifier 62 with the positive side connection point 111 of the DC output of the second rectifier 62 as the cathode side. The DC output is connected in parallel with the DC output of the second rectifier 62 through a second anti-reflux diode 602 whose negative side connection point 112 is the anode side.

  The reflux prevention diodes 601 and 602 prevent the current from flowing back between the second windings through the midpoint S of the series capacitor circuit 16 constituting the voltage doubler rectifier circuit 81 without being charged in the battery 13. Connected for purpose.

  FIG. 3 shows the rectifier circuit 2 of the power generator for a distributed power source when the number of turns of the second winding in the permanent magnet generator 3 in Example 1 is twice the number of turns of the first winding. It is explanatory drawing at the time of connecting DC output to constant voltage sources, such as a battery.

  With reference to FIG. 3, the DC output of the rectifier circuit 2 of the distributed power generation apparatus according to the first embodiment will be described. When the wind turbine rotational speed N rises and the voltage of the second winding reaches half of the voltage at which charging of the battery 13 starts to be charged, that is, half of the wind turbine rotational speed N22 in FIG. The battery 13 is charged from the output terminal 10 through the capacitor 7 and from the voltage doubler rectifier circuit 81. The DC output is as indicated by P21 in FIG.

  Further, when the wind turbine rotational speed N rises and becomes near the wind turbine rotational speed N 21, the direct current is output from the second rectifier 62 via the output terminal 10 of the second winding and the second reactor 5, and the battery 13 is charged. Is done. The DC output is as indicated by P22 in FIG.

  When the wind turbine rotational speed N further increases and reaches the wind turbine rotational speed N1, the direct current is output from the first rectifier 61 via the first reactor 4 from the first winding, and the battery 13 is charged. The battery 13 is charged with the total output of P21, P22, and P1, which are DC outputs, and an approximate output curve Ps along the maximum output curve Pt can be obtained as shown in FIG.

  As described above, in the first embodiment, the second winding in the permanent magnet generator 3 has the second reactor 5 connected in series to the output terminal 10 of the second winding, and the second reactor The capacitor 7 is connected in series to the output terminal 10 of the second winding and the rectifier circuit that connects the second rectifier 62 via 5, and is connected to the third rectifier 63 via the capacitor 7, The voltage doubler rectifier circuit is configured by connecting one phase of the second winding connected to the rectifier 63 to the middle point S of the series capacitor circuit 16 connected in parallel to the DC output side of the third rectifier. The direct current outputs of 81 are connected in parallel. As shown in FIGS. 3 and 4, the series combined impedance of the internal inductance of the second winding and the capacitor is designed to be capacitive within the rated rotational speed range of the permanent magnet generator. In addition, an output can be obtained even in a region where the windmill rotational speed N is low, and even when the windmill rotational speed N is large, the maximum output curve Pt and the approximate output curve Ps can be substantially matched.

  The DC voltage values of the first voltage doubler capacitor 14 and the second voltage doubler capacitor 15 are charged to half the voltage value of the battery 13, although the voltage pulsation has a magnitude depending on the magnitude of the capacitor capacity. Therefore, the wind turbine rotational speed N21 becomes a voltage that can be charged at half the wind turbine rotational speed N22, and the battery 13 can be charged.

  Therefore, it is possible to configure a rectifier circuit that can be charged from a low windmill speed, and further to suppress the withstand voltage of the second winding as in the prior art.

In the embodiment of the present invention shown in FIG. 1, the case of two types of windings of the permanent magnet generator 3 has been described. However, as the three types of windings, a double voltage is applied to the windings that start charging from a low wind turbine speed. A method of connecting a rectifier circuit is also possible.
By configuring in this way, the output to the constant voltage source such as the battery 13 of the rectifier circuit 2 of the power generator for the distributed power supply can be made closer to the maximum output curve Pt of the windmill than in the case of two windings. You can get more energy from the wind.

In addition, the reactor used in the present invention can be finely adjusted so as to match the wind turbine output characteristics by being a saturated reactor or having a tap.
Furthermore, the first reactor 4 in FIG. 1 can be omitted if the inductance in the permanent magnet generator 3 can be grasped at the design stage.

  The second embodiment of the present invention shown in FIG. 2 is one type of winding in the permanent magnet type generator 3 in the rectifier circuit of the distributed power generator described in the first embodiment of the present invention. It is a main circuit connection diagram in the case of.

  In the figure, 81 is a voltage doubler rectifier circuit, 113 is a positive connection point of the first rectifier 61 and the voltage doubler rectifier circuit 81, 114 is a negative connection point of the first rectifier 61 and the voltage doubler rectifier circuit 81, The same reference numerals as those in FIGS. 1, 10 and 11 denote the same components. The rectifier circuit 2 of the power generator for a distributed power source according to the present invention includes a permanent magnet generator, a first reactor, a capacitor, first to second rectifiers, first to second voltage doubler capacitors, first and first capacitors. 2 free-flow prevention diodes, a positive output terminal, and a negative output terminal.

Hereinafter, FIG. 2 will be described.
The output of the first winding is output from the output terminal 9 of the first winding to the battery 13 via the two DC output circuits. Two DC output circuits will be described below.

  The first DC output circuit of the first winding has a first reactor 4 connected in series to the output terminal 9 of the first winding, and a first rectifier in series with the first reactor 4. 61 is connected. The DC output is output to the battery 13 via the output terminal 9 of the first winding, the first reactor 4 and the first rectifier 61.

The second DC output circuit of the first winding is configured as follows.
The capacitor 7 is connected in series to the output terminal 9 of the first winding, the second rectifier 62 is connected in series to the capacitor 7, and the first winding connected to the second rectifier 62 is connected. One phase is connected to the midpoint S of the series capacitor circuit 16 connected in parallel to the DC output side of the second rectifier. The series capacitor circuit 16 is configured by connecting a first voltage doubler capacitor 14 and a second voltage doubler capacitor 15 in series. The second rectifier 62 and the series capacitor circuit 16 constitute a voltage doubler rectifier circuit 81.

  The second DC output circuit of the first winding configured as described above is output to the battery 13 via the output terminal 9 of the first winding, the capacitor 7 and the voltage doubler rectifier circuit 81.

  Here, the DC output of the voltage doubler rectifier circuit 81 is generated by the first reflux prevention diode 601 and the second rectifier 62 having the positive side connection point 113 of the DC output of the second rectifier 61 as the cathode side. The DC output is connected in parallel with the DC output of the first rectifier 61 via a second reflux prevention diode 602 whose anode side is the negative connection point 114 of the DC output.

  Similar to the first embodiment, the freewheeling prevention diodes 601 and 602 are not charged to the battery 13, and pass through the middle point S of the series capacitor circuit 16 constituting the voltage doubler rectifier circuit 81, and between the first windings. It is connected for the purpose of preventing current from flowing back.

  The DC voltage of each of the first voltage doubler capacitor 14 and the second voltage doubler capacitor 15 is charged to half of the voltage of the battery 13, although there is a voltage pulsation depending on the size of the capacitor. Therefore, the DC output of the voltage doubler rectifier circuit 81 can be started to charge the battery 13 at half the wind turbine speed at which the DC output of the first rectifier 61 is started.

  The DC output of the voltage doubler rectifier circuit 81 and the DC output of the first rectifier 61 are substantially equal to P2 and P1 in FIG. As described above, the total output of the present invention is substantially equivalent to the approximate output curve Ps of FIG. 6, but is not approximated to the maximum output curve Pt than the approximate output curve Ps of Example 1, but by a simple method, The output approximated to the maximum output curve Pt can be taken out. In other words, it is possible to achieve performance equivalent to that of the rectifier circuit of the power generator for a distributed power source according to the first conventional example, which is constituted by a permanent magnet generator having two windings built in, with a single winding.

In addition, the reactor used in the present invention can be finely adjusted so as to match the wind turbine output characteristics by being a saturated reactor or having a tap.
Furthermore, the reactor 4 in FIG. 2 can be omitted if the inductance in the permanent magnet generator 3 can be grasped at the design stage.

  According to the rectifier circuit of the power generator for a distributed power source of the present invention, charging is started from a low windmill speed without increasing the withstand voltage of the winding by connecting the voltage doubler rectifier circuit and the reflux prevention diode. It is possible to extract the approximate maximum output obtained from wind or water, which is very useful.

  Further, since the withstand voltage of the winding that starts charging at a low wind turbine speed in the permanent magnet generator is not strengthened, an inexpensive rectifier circuit for a power generator for a distributed power source can be provided.

DESCRIPTION OF SYMBOLS 1 Windmill 2 Distributed power generator 3 Permanent magnet type generator 4, 5 1st, 2nd reactor 61, 62, 63 1st, 2nd, 3rd rectifier 7 Capacitor 81 Voltage doubler rectifier circuit 9 1st Winding output terminal 10 Second winding output terminals 14 and 15 First and second voltage doubler capacitors 16 Series capacitor circuits 601 and 602 First and second anti-reflective diodes 111 of the second rectifier DC output and positive output node 112 of the double voltage rectifier circuit DC output of the second rectifier and negative output node 113 of the DC output of the voltage doubler rectifier circuit 113 DC output of the first rectifier and the double voltage rectifier circuit DC output positive connection point 114 DC output of the first rectifier and DC output negative connection point of the voltage doubler rectifier circuit 11 Positive output terminal 12 of the power generator for distributed power supply 12 Negative output terminal of the power generator for distributed power supply 13 battery

Claims (3)

  In a rectifier circuit of a power generator for a distributed power source that obtains an approximate maximum output of a wind turbine or a water turbine from a permanent magnet generator driven by a wind turbine or a water turbine regardless of the flow velocity of the wind or water, the first of the permanent magnet generator The first winding is connected to the first rectifier via the output terminal of the first winding and the first reactor, and the second winding of the permanent magnet generator is the second winding. And an output terminal and a second reactor of the second winding connected to the second rectifier, and the second winding is connected to the voltage doubler rectifier circuit via the output terminal of the second winding and the capacitor. The DC output of the rectifier circuit and the DC output of the second rectifier are connected in parallel via a reflux prevention diode, and the DC output of the first rectifier is further connected in parallel. Rectifier circuit for power generator.   The voltage doubler rectifier circuit has a capacitor connected in series to the output terminal of the second winding of the permanent magnet generator, a third rectifier is connected via the capacitor, and is connected to the third rectifier. One phase of an arbitrary winding to be connected to the middle point of a series capacitor circuit connected in parallel to the DC output side of the third rectifier, and the positive side of the DC output of the voltage doubler rectifier circuit In addition, a positive connection point of the second rectifier is set as a cathode side, a first reflux prevention diode is connected in series, and a negative connection of the second rectifier is connected to a negative side of a DC output of the voltage doubler circuit. 2. The rectifier circuit for a power generator for a distributed power source according to claim 1, wherein the point is the anode side and a second reflux prevention diode is connected in series. Winding in a permanent magnet generator in a rectifier circuit of a power generator for a distributed power source that obtains the approximate maximum output of a wind turbine or water turbine from a permanent magnet generator driven by a wind turbine or water turbine regardless of the flow velocity of wind or water The rectifier circuit that starts charging at a low wind turbine speed is configured by the voltage doubler rectifier circuit and the first rectifier circuit, and the positive side of the DC output of the voltage doubler rectifier circuit The anode side, connected in series with a reflux prevention diode, the negative side of the DC output of the voltage doubler rectifier circuit as the cathode side, connected in series with a reflux prevention diode, and the voltage doubler rectifier connected with the reflux prevention diode A rectifier circuit for a power generator for a distributed power source, wherein a DC output of a circuit and a DC output of the first rectifier circuit are connected in parallel.

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