JP6206251B2 - Capacitor module testing device, capacitor module testing method - Google Patents

Description

  The present invention includes first and second input / output lines having a connection terminal between a pair of input / output terminals, and a capacitor element connected to the connection terminals of the first and second input / output lines. The present invention relates to a capacitor module test apparatus and a capacitor module test method that can perform an operation test of a capacitor module.

  At the time of shipment of a capacitor, a test is conducted to examine the effect of the capacitor by actually applying a DC voltage including ripple.

  In Patent Document 1 and Patent Document 2, a capacitor having one terminal on each of the input side and the output side is used to create a state in which a DC voltage including ripple is applied, and the effect on the capacitor at that time is tested. Have been described.

JP 2007-155599 A JP 2003-130902 A

  By the way, as a capacitor, not only a capacitor having one terminal on each of the input side and the output side, but also a capacitor having a plurality of terminals on both the input side and the output side.

  Examples of this type of capacitor include the following capacitor modules. This type of capacitor module includes, for example, first and second input / output lines including at least one connection terminal for connecting a capacitor element between a pair of input / output terminals. A capacitor element is connected to the connection terminal of the first input / output line and the connection terminal of the second input / output line.

  This type of capacitor module is used as an input capacitor or a DC link capacitor in an actual device, for example, a power converter. In this case, the first and second input / output lines are included in a DC current loop in which a DC current flows. Therefore, it is necessary to perform an operation test of the capacitor module under such actual use conditions.

  However, in the configurations of Patent Documents 1 and 2 described above, when the capacitor module having the above-described configuration is connected instead of the capacitor having one terminal on each of the input side and the output side, the first and second input / output lines are provided. The DC current loop through which the DC current flows is not included. Therefore, this type of capacitor module cannot be tested for operation under actual use conditions.

  The present invention has been made under the circumstances described above, and the connection between the first and second input / output lines and the first and second input / output lines provided with a connection terminal between the pair of input / output terminals. It is an object of the present invention to provide a capacitor module test apparatus and a capacitor module test method capable of performing an operation test of a capacitor module including a capacitor element connected to a terminal for use.

  In order to achieve the above object, a capacitor module testing apparatus according to one aspect of the present invention includes a pair of input / output terminals used as at least one connection terminal as one or both of an input terminal and an output terminal. A first and a second input / output line, and a capacitor element connected to the connection terminal of the first input / output line and the connection terminal of the second input / output line; A capacitor module testing apparatus for testing a capacitor module, comprising: a DC power supply having a pair of DC power supply terminals; an AC power supply having a pair of AC power supply terminals; one of the pair of DC power supply terminals; One of the pair of input / output terminals of one input / output line, and the other of the pair of DC power supply terminals and the pair of input / output of the second input / output line A pair of first paths that connect one of the children, one of the pair of AC power supply terminals, and the other of the pair of the input / output terminals of the first input / output line, and the pair A pair of second paths connecting the other of the AC power supply terminals and the other of the pair of input / output terminals of the second input / output line, and a third path connected between the pair of second paths A first AC current interrupting element that is provided on the first path and passes a DC current and interrupts the AC current; and a connection point between the third path and the AC path on the second path A DC current blocking element that is provided between the power source and passes the AC current and blocks the DC current; and a second AC that is provided on the third path and passes the DC current and blocks the AC current. And a current interrupting element.

  In the above-described configuration, one of the pair of DC power supply terminals and one of the pair of input / output terminals of the first input / output line are connected by the pair of first paths, and the pair of DC power supplies The other of the power supply terminals is connected to one of the pair of input / output terminals of the second input / output line, and one of the pair of AC power supply terminals is connected to the first input terminal by the pair of second paths. The other of the pair of input / output terminals of one input / output line is connected, and the other of the pair of AC power supply terminals and the other of the pair of input / output terminals of the second input / output line are connected. By doing so, the capacitor module may be attached.

  In the above configuration, the AC current interrupting element may be a reactor.

  In the above configuration, the direct current interrupting element may be a capacitor.

  In addition, the capacitor module testing method according to another aspect of the present invention includes at least one connection terminal provided between a pair of input / output terminals used as one or both of an input terminal and an output terminal. A capacitor module comprising: 1 and a second input / output line; and a capacitor element connected to the connection terminal of the first input / output line and the connection terminal of the second input / output line. In the method, a DC voltage is applied to a pair of first paths to which one of the pair of input / output terminals of the first and second input / output lines is connected, and the first and second inputs are applied. A first step of applying an AC voltage to a pair of second paths connected to the other of the pair of input / output terminals of the input / output line; and the capacitor module when the first step is executed. And a second step of measuring a parameter, wherein a third path is connected between the pair of second paths, and the direct current is passed on the first path to pass the alternating current. A first alternating current interrupting element for interrupting is provided, and the alternating current is passed between the connection point between the third path and the alternating current power source on the second path, and the direct current is passed. A DC current interrupting element for interrupting current is provided, and a second AC current interrupting element for allowing the DC current to pass therethrough and interrupting the AC current is provided on the third path. .

  In the above method, the AC current interrupting element may be a reactor.

  In the above method, the DC current interrupting element may be a capacitor.

  According to the present invention, a DC voltage and an AC voltage are applied between the first and second input / output lines of the capacitor module, and the first and second input / output lines are connected to the DC current loop and the AC current loop. include. At the same time, an alternating current flows through the capacitor element. At this time, direct current does not flow into the alternating current power supply, and alternating current does not flow into the direct current power supply.

  Thus, the operation of the capacitor module can be safely tested under actual use conditions, for example, under a condition where a DC voltage including ripple is applied between the first and second input / output lines.

It is the circuit block diagram which showed an example of the circuit structure of the capacitor | condenser module testing apparatus which concerns on one Embodiment of this invention. It is the figure which showed an example of the structure of a capacitor | condenser module. It is the figure which showed the state in which the capacitor module was attached to the capacitor module test apparatus. It is the flowchart which showed an example of the capacitor module test method which concerns on one Embodiment of this invention. It is the figure which showed the other example of the structure of the capacitor | condenser module. It is the block diagram which showed an example of the structure of the power conversion system comprised using the capacitor | condenser module.

  Hereinafter, a capacitor module test apparatus and a capacitor module test method according to an embodiment of the present invention will be described with reference to the drawings. The term “input / output terminal” shown below refers to a terminal used as one or both of an input terminal and an output terminal.

  A capacitor module testing apparatus 1 shown in FIG. 1 performs an operation test of the capacitor module 4a in a state where the capacitor module 4a as shown in FIG. 2 is attached.

  As shown in FIG. 1, the capacitor module testing apparatus 1 includes a DC power source 2, an AC power source 3, a pair of first paths L1, L10, a pair of second paths L2, L20, a third path L3, 1st reactor (1st alternating current interruption element) 5a, 5b, 2nd reactor (2nd alternating current interruption element) 5c, capacitor | condenser (direct current interruption element) 6a, 6b, ammeter 7a, 7b, voltage A total of 8 a and 8 b and a thermometer 9 are provided.

  The DC power supply 2 has a pair of DC power supply terminals T20 and T21. The DC power supply terminal T20 forms a positive pole side terminal, while the DC power supply terminal T21 forms a negative pole side terminal.

  The DC power supply 2 applies a DC voltage and a DC current to the pair of first paths L1 and L10 through the pair of DC power supply terminals T20 and T21. The DC power supply 2 is configured to be able to change the voltage value of the DC voltage and the current value of the DC current output from the DC power supply terminals T20 and T21.

  The AC power supply 3 has a pair of AC power supply terminals T30 and T31, applies an AC voltage to the pair of second paths L2 and L20, and causes an AC current to flow. The AC power supply 3 is configured to be able to change the voltage value and frequency of the AC voltage output from the AC power supply terminals T30 and T31 and the current value and frequency of the AC current.

  Each of the first paths L1 and L10 is connected to each of a pair of DC power supply terminals T20 and T21. Each of the first paths L1 and L10 has connection terminals T5 and T7 for connecting the input / output terminals T1 and T3 of the first and second input / output lines 40a and 40b of the capacitor module 4a as a test target. It has.

  Each of the second paths L2 and L20 is connected to each of a pair of AC power supply terminals T30 and T31. Each of the second paths L2, L20 includes connection terminals T6, T8 for connecting the input / output terminals T2, T4 of the first and second input / output lines 40a, 40b of the capacitor module 4a. .

  The second paths L2 and L20 are divided into AC paths L2a and L20a through which only an AC current flows, and AC / DC paths L2b and L20b through which an AC current and a DC current flow.

  The AC path L2a is composed of a second path L2 between the AC power supply 3 and the connection point P1. The AC path L20a is configured by a second path L20 between the AC power supply 3 and the connection point P2.

  The AC / DC path L2b includes a second path L2 between the input / output terminal T6 and the connection point P1. The AC / DC path L20b includes a second path L20 between the input / output terminal T8 and the connection point P2.

  The third path L3 is connected between the pair of second paths L2 and L20. The connection points are represented by P1 and P2 in FIG.

  The first reactors 5a and 5b are provided on the first paths L1 and L10. The first reactors 5a and 5b have a function as choke coils, and allow direct current to pass therethrough and cut off alternating current on the first paths L1 and L10.

  The second reactor 5c is provided on the third path L3. The second reactor 5c also has a function as a choke coil, and passes a direct current on the third path L3 to cut off the alternating current.

  The capacitor 6a is provided between the connection point P1 between the third path L3 and the AC power supply 3 on the second path L2. The capacitor 6b is provided between the connection point P2 between the second path L20 and the third path L3 and the AC power supply 3. The capacitors 6a and 6b have a function as a coupling capacitor, and pass an alternating current through the second paths L2 and L20 to cut off the direct current.

  The ammeter 7a is provided on the first path L1. The ammeter 7a measures the current value of the current flowing through the input / output terminals T1 and T3 of the capacitor module 4a. The ammeter 7b is provided on the second path L2. The ammeter 7b measures the current value of the current flowing through the input / output terminals T2 and T4 of the capacitor module 4a.

  The voltmeter 8a is provided between the first paths L1 and L10. The voltmeter 8a measures the voltage value of the voltage between the input / output terminals T1 and L10. The voltmeter 8b is provided between the second paths L2 and L20. The voltmeter 8b measures the voltage value of the voltage between the input / output terminals T2 and T4.

  The thermometer 9 is composed of, for example, a non-contact type thermometer, and measures the surface temperature of the capacitor module M mounted in the mounting space S.

  In the capacitor module testing apparatus 1, in order to prevent burn-in of the direct current loop (described later) and the alternating current loop (described later), one or both of the first paths L1 and L10 and the second are appropriately selected. A resistor is provided in one or both of the paths L2 and L20. As this type of resistor, a resistor having a resistance value corresponding to the electromotive force of the DC power source 2 and the AC power source 3 is provided.

  Hereinafter, the configuration of the capacitor module 4a to be tested by the capacitor module testing apparatus 1 having such a configuration will be described with reference to FIG. The capacitor module 4a includes capacitor elements 41a to 41c having a pair of electrodes (not shown) each having a different polarity, a first input / output line 40a, and a second input / output line 40b. In the following description, unless otherwise specified, the capacitor elements 41a to 41c are collectively referred to as a capacitor element 41.

  As shown in FIG. 2, the first input / output line 40a is formed with a pair of input / output terminals T1 and T2, and the second input / output line 40b is also formed with a pair of input / output terminals T3 and T4. ing.

  Connection terminals T9a to T9c for connecting one of the pair of electrodes of the capacitor elements 41a to 41c are provided between the input / output terminals T1 and T2 of the first input / output line 40a. Connection terminals T10a to T10c for connecting the other of the pair of electrodes of the capacitor elements 41a to 41c are provided between the input / output terminals T3 and T4 of the second input / output line 40b.

  One of the pair of electrodes of the capacitor elements 41a to 41c is connected to each of the connection terminals T9a to T9c of the first input / output line 40a. On the other hand, the other of the pair of electrodes of the capacitor elements 41a to 41c is connected to each of the connection terminals T10a to T10c of the second input / output line 40b.

  An example of this type of capacitor module 4a is a bus bar capacitor in which each of a pair of bus bars has two input / output terminals.

  This type of bus bar capacitor includes a pair of bus bars arranged in parallel and having conductivity as a pair of input / output lines 40a and 40b. From each of the pair of bus bars, for example, a pair of input / output terminals is formed so as to protrude from the bus bar. Thereby, the input / output terminals T1 and T2 can be formed in the input / output line 40a, and the input / output terminals T3 and T4 can be formed in the input / output line 40b. Voltages having different polarities are applied to the input / output terminals T1 and T2 and the input / output terminals T3 and T4.

  On one side of the pair of bus bars, connection terminals T9a to T9c for connecting capacitor elements are formed. Also, connection terminals T10a to T10c for connecting capacitor elements are formed on the other of the pair of bus bars. As described above, each of the pair of electrodes of the capacitor element 41 is connected to the connection terminals T9a to T9c and the connection terminals T10a to T10c.

  As a result, the capacitor elements 41a to 41c are connected in parallel between the first and second input / output lines 40a and 40b.

  In the present embodiment, three capacitor elements 41 are provided. However, the present invention is not limited to this example, and one, two, or four or more capacitor elements 41 may be provided.

  In the capacitor module testing apparatus 1, when testing the capacitor module 4a, the tester connects the input / output terminal T1 of the first input / output line 40a to the connection terminal T5 and the second input to the connection terminal T7. The input / output terminal T3 of the output line 40b is connected. Further, the tester connects the input / output terminal T2 of the first input / output line 40a to the connection terminal T6, and connects the input / output terminal T4 of the second input / output line 40b to the connection terminal T8. Connection between the terminals is performed, for example, by screwing.

  Thereby, the DC power supply terminal T20 and the input / output terminal T1 of the first input / output line 40a are connected by the first path L1, and the DC power supply terminal T21 and the second input / output are connected by the first path L10. The input / output terminal T3 of the line 40b is connected.

  In parallel with this, the tester connects the input / output terminal T2 of the first input / output line 40a to the connection terminal T6, and connects the input / output terminal T4 of the second input / output line 40b to the connection terminal T8. Connecting.

  Thereby, the AC power supply terminal T30 and the input / output terminal T2 of the first input / output line 40a are connected by the second path L2, and the AC power supply terminal T31 and the input / output terminal T4 of the second input / output line 40b are connected. And are connected.

  The tester attaches the capacitor module 4a to the capacitor module testing apparatus 1 by performing the above operations.

  In FIG. 1, a space S surrounded by a broken line is a mounting space in which the capacitor module 4a is mounted. In the mounting space S, the capacitor module 4a is mounted as described above.

  When the capacitor module 4a is attached to the attachment space S as described above, the capacitor module testing apparatus 1 is in the state shown in FIG.

  In this state, the DC power supply 2, the first paths L1, L10, the first reactors 5a, 5b, the first input / output line 40a, the second input / output line 40b, the AC / DC paths L2b, L20b, the third path L3, and the first A DC current loop in which a DC current flows is formed by the two reactors 5c.

  The AC power supply 3, the second paths L2 and L20, the capacitors 6a and 6b, the first input / output line 40a, the second input / output line 40b, and the capacitor element 41 form an AC current loop through which an AC current flows. .

  That is, when the DC power supply 2 is activated in the state of FIG. 3, since a DC voltage is applied to the pair of first paths L1 and L10, a positive voltage is applied to the first input / output line 40a and a negative voltage is applied to the input / output line 40b. A voltage is applied.

  Further, since a direct current flows through the pair of first paths L1 and L10, the direct current is converted into the first path L1, the first reactor 5a, the input / output terminal T5 (T1), the first input / output line 40a, and the input / output terminal. T6 (T2), AC / DC path L2b, 3rd path L3, 2nd reactor 5c, AC / DC path L20b, I / O terminal T8 (T4), 2nd I / O line 40b, I / O terminal T7 (T3), 1st reactor 5b And in the order of the first path L10.

  Accordingly, the DC power source 2, the first paths L1, L10, the first reactors 5a, 5b, the first and second input / output lines 40a, 40b, the AC / DC paths L2b, L20b, the third path L3, and the second reactor 5c. To form a direct current loop.

  Of the direct current flowing through the direct current loop, the direct current flowing through the AC / DC paths L2b and L20b tends to flow into the alternating current paths L2a and L20a. However, since the capacitors 6a and 6b are provided in the AC paths L2a and L20a, the direct current does not flow into the AC paths L2a and L20a. As a result, the direct current flows into the alternating current power supply 3, so that the alternating current power supply 3 is not likely to be adversely affected.

  Further, when the AC power supply 3 is activated in the state of FIG. 3, an AC voltage is applied to the pair of second paths L2 and L20, so that an AC voltage is applied between the input / output lines 40a and 40b.

  In addition, since an alternating current flows through the pair of second paths L2 and L20, the alternating current is converted into alternating paths L2a and L20a, capacitors 6a and 6b, AC / DC paths L2b and L20b, an input / output terminal T2 (T6), and an input / output terminal. It passes through T8 (T4), the input / output lines 40a and 40b, and the capacitor element 41. Thus, an AC current loop is formed by the AC power supply 3, the AC paths L2a and L20a, the capacitors 6a and 6b, the AC / DC paths L2b and L20b, the input / output lines 40a and 40b, and the capacitor element 41.

  Of the AC current flowing through the AC current loop, the AC current flowing through the AC paths L2a and L20a tends to flow into the third path L3. However, since the second reactor 5c is provided in the third path L3, the alternating current does not flow into the third path L3. Thereby, an alternating current can be sent only to an alternating current loop.

  Moreover, although the alternating current flowing through the input / output lines 40a and 40b tends to flow into the first paths L1 and L10, the first reactors 5a and 5b are provided in the first paths L1 and L10. It does not flow into the paths L1 and L10. Thereby, there is no possibility that the direct current power source 2 is adversely affected by the alternating current flowing into the direct current power source 2.

  As described above, when the DC power supply 2 and the AC power supply 3 are operated, a DC voltage and an AC voltage are applied between the input / output lines 40a and 40b of the capacitor module 4a, and the input / output lines 40a and 40b are connected to the DC current. Included in the loop and the alternating current loop. At the same time, an alternating current flows through the capacitor element 41.

  A capacitor module test method using the capacitor module test apparatus 1 having such a configuration will be described below. FIG. 4 is a flowchart showing an example of a capacitor module test method according to an embodiment of the present invention.

  In the capacitor module testing method according to an embodiment of the present invention, the DC power supply 2 is operated as shown in FIG. 4 with the capacitor module 4a attached to the capacitor module testing apparatus 1, and the first paths L1 and L10 are operated. A direct current is applied and a direct current is passed (step S1).

  At the same time, the AC power supply 3 is operated to apply an AC voltage to the second paths L2 and L2 and to pass an AC current (step S2).

  Thereby, a DC voltage and an AC voltage are applied between the input / output lines 40a and 40b of the capacitor module 4a, and the input / output lines 40a and 40b are included in the DC current loop and the AC current loop. At the same time, an alternating current flows through the capacitor element 41.

  In this state, various parameters indicated by the capacitor module 4a are measured (step S3).

  An example of the parameter to be measured is the heat generation temperature of the capacitor module 4a. Since an alternating current flows through the capacitor element 41 and an alternating electric field is applied to the dielectric, dielectric loss occurs in the capacitor module 4a.

  The heat generation temperature of the capacitor module 4a can be measured, for example, as follows. The tester measures the heat generation temperature of the capacitor module 4a using the thermometer 9, for example. For example, the tester observes the measured values by the ammeters 7a and 7b and the voltmeters 8a and 8b, while measuring the DC voltage value and the DC current value output from the DC power supply 2 and the AC power output from the AC power supply 3. The measured value of the thermometer 9 is observed by changing the voltage value, the frequency, the alternating current value, and the frequency.

  As described above, according to the capacitor testing apparatus 1 and the capacitor testing method according to the embodiment of the present invention, a DC voltage and an AC voltage are applied between the input / output lines 40a and 40b of the capacitor module 4a, The input / output lines 40a and 40b are included in the direct current loop and the alternating current loop. At the same time, an alternating current flows through the capacitor element 41. At this time, the direct current does not flow into the alternating current power source 3, and the alternating current does not flow into the direct current power source 2.

  Thereby, it is possible to safely create a simulated situation where the capacitor module 4a is used in an actual device, for example, a state where a DC voltage including ripple is applied between the pair of input / output lines 40a and 40b. .

  Thereby, the operation test of the capacitor module 4a can be performed under actual use conditions.

  Thus, a test for outputting DC voltage and DC current to the input / output lines 40a and 40b using the DC power source 2, and a test for outputting AC voltage and AC current to the input / output lines 40a and 40b using the AC power source 3 Unlike the case where the actual use conditions of the capacitor module 4a are assumed from the respective test results, one test is sufficient. As a result, the test accuracy is improved and the test efficiency is improved.

  Further, as described above, the tester determines that the DC voltage value and DC current value output from the DC power supply 2, the AC voltage value and frequency output from the AC power supply 3, and the AC current value and frequency. Can be changed. Therefore, unlike the case where the capacitor module 4a is used for a specific application, the value of the DC voltage and the value of the DC current input to the capacitor module 4a, the value of the AC voltage, the frequency of the AC voltage, the frequency of the AC current, Value and frequency of alternating current are not determined according to the application.

  Therefore, the capacitor module 4a can be tested in a state corresponding to every possible use. As a result, the capacitor module testing apparatus 1 can be used for general purposes according to the intended use of the capacitor module 4a.

  Further, in order to test the capacitor module 4a in a state where it is incorporated in an actual device such as the power conversion system 300 (see FIG. 5), it is necessary to actually operate the actual device. In this case, for example, in the power conversion system 300, the power loss in the voltage conversion circuit 311, the three-phase inverter 320, the motor 340 or the motor 340 simulation circuit (for example, the RL series circuit) is very large.

  However, according to the capacitor module testing apparatus and the capacitor module testing method according to the present invention, only the first reactor 5a, 5b, the second reactor 5c, the capacitors 6a, 6b, and the power loss in the path are sufficient.

  Thereby, since the test of the capacitor module 4a can be performed with small power consumption, energy saving can be achieved.

  Moreover, according to the capacitor module testing apparatus and the capacitor module testing method according to the present invention, the reactors 5a to 5c are used as the first and second alternating current interrupting elements. Thereby, the first and second alternating current interrupting elements can be provided inexpensively and easily.

  One first reactor 5a or 5b may be provided on either one of the first paths L1 and L10. In addition, as the first and second AC interrupting elements, elements or circuits other than the reactor that pass DC current and interrupt AC current, such as diodes and filter circuits, may be used.

  Further, capacitors 6a and 6b are used as DC current interrupting elements. Thereby, a direct current interruption element can be provided cheaply and simply.

  One capacitor 6a or 6b may be provided between one of the positions P1 and P2 and the AC power supply 3. Further, as the DC current interrupting element, for example, a filter circuit that allows an AC current to pass and interrupts the DC current may be used.

  Moreover, since the capacitor module 4a is attached to the capacitor module testing apparatus 1 in the mounting space S as described above, the capacitor module 4a can be easily attached to the capacitor module testing apparatus 1.

  Next, another example of the configuration of the capacitor module to be tested will be described with reference to FIG. Unlike the capacitor module 4a described above, the capacitor module 4a is divided into three common input / output terminals T2a to T2c. The input / output terminal T2 that can be on the AC power side under actual use conditions. The input / output terminal T4 that can be on the AC power side under actual use conditions is also divided into three common input / output terminals T4a to T4c.

  The capacitor module 4b having this type of configuration has been used in recent years because it can realize an equivalent series inductance (ESL) smaller than that of the capacitor module 4a.

  For example, as shown in FIG. 5, the capacitor module 4b having this type of configuration is provided with a first common input / output line 400a used in common by the input / output terminals T2a to T2c. Further, for example, a second common input / output line 400b that is commonly used by the input / output terminals T4a to T4c is provided.

  In this example, the first and second common input / output lines 400a and 400b are provided in parallel with the capacitor elements 41a to 41c.

  The first common input / output line 400a is provided with three connection terminals T9a to T9c for connecting one electrode of each of the capacitor elements 41a to 41c. One of the electrodes of the capacitor elements 41a to 41c is connected to each of the connection terminals T9a to T9c.

  The second common input / output line 400b is provided with three connection terminals T10a to T10c for connecting the other electrodes of the capacitor elements 41a to 41c. The other electrodes of the capacitor elements 41a to 41c are connected to the connection terminals T10a to T10c, respectively.

  The second common input / output line 400bd is provided with connection terminals T10d and T10e for line connection. The input / output line 400b1 connected to the input / output terminal T4a is connected to the connection terminal T10d. The input / output line 400b2 connected to the input / output terminal T4b is connected to the connection terminal T10e.

  In the first common input / output line 400a, input / output lines 400a1 to 400a3 connected to the input / output terminals T2a to T2c are connected to the connection terminals T9a to T9c.

  In the capacitor module 4a having such a configuration, the first input / output line 40a1 extending from the input / output terminal T1 to the input / output terminal T2a through the first common input / output line 400a and the input / output line 400a1 is configured. (A line indicated by a solid arrow in FIG. 5).

  Further, a first input / output line 40a2 extending from the input / output terminal T1 to the input / output terminal T2b through the first common input / output line 400a and the input / output line 400a2 is configured (a two-dot chain line arrow in FIG. 5). Line specified in).

  Furthermore, a first input / output line 40a3 extending from the input / output terminal T1 to the input / output terminal T2c through the first common input / output line 400a and the input / output line 400a3 is configured (indicated by a dotted arrow in FIG. 5). Explicit line).

  As described above, in the capacitor module 4a, the three first input / output lines 40a1 to 40a3 are formed. The first input / output line 40a1 includes input / output terminals T1 and T2a at both ends, and a connection terminal T9a for connecting a capacitor element is provided between the input / output terminals T1 and T2a.

  The first input / output line 40a2 includes input / output terminals T1 and T2b at both ends thereof, and connection terminals T9a and T9b for connecting capacitor elements are provided between the input / output terminals T1 and T2b.

  The first input / output line 40a3 includes input / output terminals T1 and T2c at both ends, and connection terminals T9a, T9b, and T9c for connecting capacitor elements are provided between the input / output terminals T1 and T2c. .

  On the other hand, in the capacitor module 4a, the second input / output line 40b1 extending from the input / output terminal T3 to the input / output terminal T4a through the second common input / output line 400b and the input / output line 400b1 is formed ( Lines indicated by solid arrows in FIG. 5).

  Further, a second input / output line 40b2 extending from the input / output terminal T3 to the input / output terminal T4b through the second common input / output line 400b and the input / output line 400b2 is formed (two-dot chain line in FIG. 5). Line indicated by an arrow).

  Further, a second input / output line 40b3 extending from the input / output terminal T3 to the input / output terminal T4c through the second common input / output line 400b is formed (a line indicated by a dotted arrow in FIG. 5).

  As described above, in the capacitor module 4a, three systems of the second input / output lines 40b1 to 40b3 are formed. The second input / output line 40b1 includes input / output terminals T3 and T4a at both ends thereof, and a connection terminal T10a for connecting a capacitor element is provided between the input / output terminals T3 and T4a.

  The second input / output line 40b2 includes input / output terminals T3 and T4b at both ends, and connection terminals T10a and T10b for connecting capacitor elements are provided between the input / output terminals T3 and T4b.

  The second input / output line 40b3 includes input / output terminals T3, T4c at both ends thereof, and connection terminals T10a, T10b, T10c for connecting capacitor elements are provided between the input / output terminals T3, T4c. .

  In the capacitor module 4a having such a configuration, the first input / output line 40a1 and the second input / output line 40b1 are included in the direct current loop and the alternating current loop under actual use conditions. The correspondence between the first input / output line 40a1 and the second input / output line 40b1 should be identified by a solid arrow.

  Further, under actual use conditions, the first input / output line 40a2 and the second input / output line 40b2 are included in the direct current loop and the alternating current loop. Note that the correspondence between the first input / output line 40a2 and the second input / output line 40b2 should be identified by a two-dot chain arrow.

  Further, under actual use conditions, the first input / output line 40a3 and the second input / output line 40b3 are included in the direct current loop and the alternating current loop. Note that the correspondence between the first input / output line 40a3 and the second input / output line 40b3 should be identified by a dashed arrow.

  Therefore, it is necessary to perform an operation test of the capacitor module 4b by reproducing such actual test conditions in a simulated manner. In order to perform an operation test of the capacitor module 4b having such a configuration, for example, the input / output terminal T1 of the capacitor module 4b is connected to the DC power supply terminal T20 using the first path L1, and the input / output terminal T3 is also connected. Is connected to the DC power supply terminal T21 using the first path L10.

  As a result, the input / output terminal T1 of the capacitor module 4b is connected to the DC power supply terminal T20, and the input / output terminal T3 is connected to the DC power supply terminal T21.

  At the same time, the input / output terminals T2a, T2b, and T2c of the capacitor module 4b are connected to the connection point P1 using the AC / DC path L2b. In addition, each of the input / output terminals T4a, T4b, and T4c is connected to the connection point P2 using the AC / DC path L20B.

  Thereby, the combination of the input / output terminals T2a and T4a of the capacitor module 4b, the combination of the input / output terminals T2b and T4b, and the combination of the input / output terminals T2c and T4c are arranged in parallel with the second reactor 5c across the third path. Connected to L3.

  Thereby, in the capacitor module 4b, the same operation as the capacitor module 4a is performed.

  That is, in the capacitor module 4b, a DC voltage and an AC voltage are applied between the input / output lines 40a1 and 40b1, and the input / output lines 40a1 and 40b1 are included in the DC current loop and the AC current loop.

  At the same time, a DC voltage and an AC voltage are applied between the input / output lines 40a2 and 40b2, and the input / output lines 40a2 and 40b2 are included in the DC current loop and the AC current loop.

  At the same time, a DC voltage and an AC voltage are applied between the input / output lines 40a3 and 40b3, and the input / output lines 40a3 and 40b3 are included in the DC current loop and the AC current loop.

  At the same time, an alternating current flows through the capacitor element 41. At this time, the direct current does not flow into the alternating current power source 3, and the alternating current does not flow into the direct current power source 2.

  Thereby, also about the capacitor | condenser module 4b, like the capacitor | condenser module 4a, an operation test can be performed on actual use conditions.

  Next, a power conversion system 300 employing the capacitor modules 4a and 4b is shown in FIG. FIG. 6 is a block diagram illustrating an example of a configuration of a power conversion system configured using the capacitor modules 4a and 4b.

  In this power conversion system 300, the capacitor module 4a is used as an input capacitor, while the capacitor module 4b is used as a DC link capacitor. Therefore, in the following description, the input capacitor is called the input capacitor 4a, and the DC link capacitor is called the DC link capacitor 4b.

  The power conversion system 300 includes a DC power supply 2, a DC / DC converter 310, a DC link capacitor 4 b, and a three-phase inverter 320. The DC / DC converter 310 includes an input capacitor 4a and a voltage conversion circuit 311.

  The DC power source 2 is, for example, a battery (secondary battery).

  When DC power is supplied from the DC power supply 2, the DC / DC converter 310 receives a DC voltage via the input capacitor 4 a, boosts it with the voltage conversion circuit 311, and outputs it. The input capacitor 4 a is a smoothing capacitor for removing a ripple component included in the DC voltage supplied from the DC power supply 2.

  The boosted DC voltage that is the output of the DC / DC converter 310 is applied to the three-phase inverter 320 via the DC link capacitor 4b. The DC link capacitor 4b is a smoothing capacitor for removing the ripple component of the DC voltage output from the DC / DC converter 310. The three-phase inverter 320 converts the input DC power into three-phase AC power and outputs it. The output three-phase AC power is supplied to the motor 340 via the three-phase power supply line 330.

  On the other hand, when the three-phase inverter 320 receives the three-phase AC power generated with the rotation of the motor 340, the three-phase inverter 320 converts the input three-phase AC power into DC power and outputs the DC power to the DC link capacitor 4b. The DC link capacitor 4b removes a ripple component of the DC voltage output from the three-phase inverter 320.

  The DC / DC converter 310 steps down the DC voltage output from the DC link capacitor 4b by the voltage conversion circuit 311 and smoothes the stepped down DC voltage by the input capacitor 4a. Then, the DC / DC converter 310 supplies DC power to the DC power supply 2 to charge the DC power supply 2 that is a battery.

  In this type of power conversion system 300, in the input capacitor 4a, a DC voltage is applied between the input / output lines 40a and 40b, and an alternating current as a ripple component flows through the input / output lines 40a and 40b. .

  Similarly, in the DC link capacitor 4b, a DC voltage is applied between the first input / output line (for example, the first input / output line 40a1) and the second input / output line (for example, the second input / output line 40b1). Is done. In parallel with this, an alternating current as a ripple component flows through the first input / output line (for example, the first input / output line 40a1) and the second input / output line (for example, the second input / output line 40b1). It becomes.

  As described above, the capacitor module testing apparatus 1 according to the embodiment of the present invention can simulate the state in which the capacitor modules 4a and 4b are used in an actual apparatus. Therefore, it is possible to easily test the capacitor module 4a without operating the power conversion system 300.

  It should be noted that the present invention can be variously modified and modified without departing from the broad spirit and scope of the present invention. Further, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention.

  The present invention is connected to first and second input / output lines having a connection terminal for connecting a capacitor element between a pair of input / output terminals, and to the connection terminals of the first and second input / output lines. It is suitable for performing an operation test of a capacitor module including the capacitor element.

DESCRIPTION OF SYMBOLS 1 Capacitor module test apparatus 2 DC power supply 3 AC power supplies 4a, 4b Capacitor modules 40a, 40a1, 40a2, 40a3 First input / output lines 40b, 40b1, 40b2, 40b3 Second input / output lines 400a First common input / output lines 400b Second Common input / output lines 41, 41a to 41c Capacitor elements 5a, 5b First reactor 5c Second reactor 6a, 6b Capacitor 300 Power conversion system 310 DC / DC converter 311 Voltage conversion circuit 320 Three-phase inverter 330 Three-phase power supply line 340 Motor L1, L10 First path L2, L20 Second path L2a, L20a AC path L2b, L20b AC / DC path L3 Third path T1-T8, T2a, T2b, T2c, T4a, T4b, T4c I / O terminals T9a-T9c, T10a- T 0e connection terminal P1, P2 connection point S mounting space

Claims (7)

First and second input / output lines having at least one connection terminal between a pair of input / output terminals used as either or both of an input terminal and an output terminal, and the first input / output A capacitor module testing apparatus for testing a capacitor module comprising a capacitor element connected to the connection terminal of a line and the connection terminal of the second input / output line,
A DC power supply having a pair of DC power supply terminals;
An AC power supply having a pair of AC power supply terminals;
One of the pair of DC power supply terminals is connected to one of the pair of input / output terminals of the first input / output line, and the other of the pair of DC power supply terminals is connected to the second input / output. A pair of first paths connecting one of the pair of input / output terminals of a line;
One of the pair of AC power supply terminals is connected to the other of the pair of input / output terminals of the first input / output line, and the other of the pair of AC power supply terminals is connected to the second input / output. A pair of second paths connecting the other of the pair of input / output terminals of the line;
A third path connected between the pair of second paths;
A first alternating current interrupting element provided on the first path and configured to pass a direct current and interrupt an alternating current;
A direct current interrupting element that is provided between a connection point between the third path and the alternating current power supply on the second path, and that passes the alternating current and interrupts the direct current;
A capacitor module testing apparatus comprising: a second AC current interrupting element that is provided on the third path and that allows the DC current to pass therethrough and interrupts the AC current. One of the pair of DC power supply terminals and one of the pair of input / output terminals of the first input / output line are connected by the pair of first paths and the other of the pair of DC power supply terminals. And one of the pair of input / output terminals of the second input / output line, and
One of the pair of AC power supply terminals and the other of the pair of input / output terminals of the first input / output line are connected by the pair of second paths, and the other of the pair of AC power supply terminals The capacitor module testing apparatus according to claim 1, wherein the capacitor module is attached by connecting the other of the pair of input / output terminals of the second input / output line. The capacitor module testing apparatus according to claim 1, wherein the alternating current interrupting element is a reactor. The capacitor module test apparatus according to claim 1, wherein the DC current interrupting element is a capacitor. First and second input / output lines having at least one connection terminal between a pair of input / output terminals used as either or both of an input terminal and an output terminal, and the first input / output A capacitor element connected to the connection terminal of the line and the connection terminal of the second input / output line, and a test method of a capacitor module comprising:
A DC voltage is applied to a pair of first paths to which one of the pair of input / output terminals of the first and second input / output lines is connected, and the first and second input / output lines are connected to each other. A first step of applying an alternating voltage to a pair of second paths to which the other of the pair of input / output terminals is connected;
Measuring a parameter indicated by the capacitor module when the first step is performed, and
A third path is connected between the pair of second paths,
On the first path, a first AC current interrupting element that allows the DC current to pass and interrupts the AC current is provided,
On the second path, between the connection point between the third path and the AC power supply, a DC current interrupting element that allows the AC current to pass and interrupts the DC current is provided.
A capacitor module testing method, wherein a second alternating current interrupting element that allows the direct current to pass therethrough and interrupts the alternating current is provided on the third path. The capacitor module test method according to claim 5, wherein the alternating current interrupting element is a reactor. The capacitor module test method according to claim 5, wherein the DC current interrupting element is a capacitor.

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