JP2011217483A - Power conversion equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide power conversion equipment for miniaturizing a substrate and suppressing an influence on arrangement and actuation of a switching element.SOLUTION: The power conversion equipment includes a capacitor, a plurality of switching elements, a plurality of normal-mode drive circuits, and a power supply for normal-mode drive. Also, the power conversion equipment includes at least one or more discharge-mode drive circuits M2b, M5b for driving the switching elements in discharge of charge stored in the capacitor, a power supply 50 for discharge-mode drive for outputting a power required for actuation of the discharge-mode drive circuits M2b, M5b, and a substrate 100 for disposing a plurality of connection units J2, J5 for connection to the switching elements. At least one or more discharge-mode drive circuits M2b, M5b are disposed in a specified region including the connection units J2, J5 selected from the plurality of connection units, and the power supply 50 for discharge-mode drive is disposed near the specified region. A wiring distance required for connection between the discharge-mode drive circuits M2b, M5b and the power supply 50 for discharge-mode drive can be reduced for miniaturization.

Description

  The present invention relates to a power conversion device including at least a capacitor, a switching element, a drive circuit, a drive power supply, and the like.

  In the conventional power converter, when discharging the electric charge accumulated in the smoothing capacitor, all the switching elements are turned on, and one or more switching elements are turned off before the current flowing through the switching elements becomes overcurrent. Is disclosed (see, for example, Patent Document 1). In addition, a technique is disclosed in which the control voltage of the switching element is controlled by current limiting means when the output of the DC voltage from the main power supply is turned off (see, for example, Patent Document 2).

JP 2009-232620 A Japanese Patent Laid-Open No. 9-201065

  In the above-described conventional power conversion device, the charge stored in the smoothing capacitor can be discharged by controlling the driving of the switching element. However, when the power supply to the driving circuit that performs the driving control is cut off, the switching element There is a problem in that it cannot be driven and cannot be discharged. As a measure for solving this problem, a drive circuit that operates at the time of discharging (that is, a timing at which the charge accumulated in the capacitor is discharged) is provided separately from the drive circuit that operates at a normal time (that is, when the power conversion is performed). In addition, the two drive circuits may be configured to supply power from separate power sources.

  However, at least one of the individual power supplies receives power supplied from the high voltage power supply, and outputs the voltage by stepping up / down to a required voltage. Therefore, it is necessary to arrange a power source, a drive circuit, etc. (FMVSS circuit) in the same region as the high-voltage power source. In addition, when a signal is received from a control means (for example, a CPU or a controller) arranged in a low voltage region, an insulating region is required. Therefore, the substrate becomes large depending on the arrangement of the drive circuit, etc. Affects.

  This invention is made in view of such a point, and it aims at providing the power converter device which can reduce a board | substrate and can suppress the influence on arrangement | positioning and an operation | movement of a switching element.

  The invention according to claim 1, which has been made in order to solve the above-described problems, includes a capacitor that is connected to both ends of the output side of the power supply source and smoothes, and a plurality of capacitors that convert and output the power supplied from the power supply source. Switching elements, a plurality of normal driving circuits that are provided corresponding to the switching elements and that drive the switching elements corresponding to the conversion of the power, and are necessary for the operations of the plurality of normal driving circuits. In a power conversion device including a normal driving power source that outputs electric power, the power conversion device is provided corresponding to each of one or more switching elements among the plurality of switching elements, and when discharging the electric charge accumulated in the capacitor One or more discharge driving circuits for driving the corresponding switching elements and the normal driving power source are provided separately, and the discharge driving circuit is configured. A power supply for driving for discharging that outputs electric power necessary for the switching, and a substrate that is provided corresponding to each switching element and on which a plurality of connection parts for connecting to the switching element are arranged, and the one or more The discharge driving circuit is disposed in one or more specific regions including a connection portion selected from the plurality of connection portions, and the discharge driving power source is disposed in the vicinity of the specific region. And

  According to this configuration, one or more discharge driving circuits are arranged in a region including the connection portion (hereinafter referred to as “specific region”), and the discharge driving power source is arranged in the vicinity of the specific region. This specific region includes a connection portion (that is, a connection portion connected to a switching element driven at the time of discharge), and a wiring distance necessary for connection to a drive circuit at the time of discharge arranged in the vicinity is shortened. If the wiring distance is shortened, the substrate can be reduced in size, and the influence on the arrangement and operation of the switching element can be suppressed. In particular, when a plurality of switching elements are divided into an upper arm region and a lower arm region, and other regions (for example, different potential regions described later) are not disposed between the upper arm region and the lower arm region, The substrate can be further downsized.

  Note that “normal time” means a time or period during which normal power conversion is performed, and “during discharge” means a time or period during which the charge accumulated in the capacitor is discharged without performing power conversion. Therefore, the normal time and the discharge time do not coincide with each other. As the “switching element”, any semiconductor element having a switching function can be used, for example, an IGBT or a power transistor. As the “capacitor”, any circuit element capable of accumulating and discharging (discharging) electric charges in order to realize a smoothing function can be used, and includes a storage / discharge means such as a capacitor. The “normal driving circuit” needs to be provided for each switching element, but the “discharge driving circuit” may be provided for each of one or more switching elements driven during discharging.

  The invention according to claim 2 further includes a drive signal generation circuit that generates a drive signal to be transmitted to the plurality of normal-time drive circuits, wherein the one or more discharge-time drive circuits are the drive signal generation circuit. It is arranged in a region including a connecting portion located in the vicinity of the region where is arranged. According to this configuration, the wiring distance necessary for connection between one or more discharging drive circuits and the drive signal generation circuit is shortened. If the wiring distance is shortened, the substrate can be further reduced in size, and the influence on the arrangement and operation of the switching element can be further suppressed.

  According to a third aspect of the present invention, there is provided a double-sided cooling device that cools from both sides of the switching element. According to this configuration, the switching element can be efficiently cooled by using the double-sided cooling device. In particular, when no other region (for example, a different potential region described later) is arranged between the upper arm region and the lower arm region, the layout on the substrate can be performed efficiently.

  According to a fourth aspect of the present invention, there is provided a capacitor connected to both ends on the output side of a power supply source for smoothing, a plurality of switching elements that convert and output power supplied from the power supply source, and each switching element. And a plurality of normal drive circuits that drive the switching elements corresponding to the power conversion, and a power supply for normal drive that outputs power necessary for the operations of the plurality of normal drive circuits. In the power conversion device comprising: the one or more switching elements provided for each of the switching elements, and driving the corresponding switching elements when discharging the charge accumulated in the capacitor. The above discharge driving circuit and the normal driving power source are provided separately, and the discharge driving circuit outputs power necessary for the operation of the discharging drive circuit. The power supply and the plurality of switching elements are divided into an upper arm region and a lower arm region, and the potentials of these regions differ between the upper arm region and the lower arm region. A substrate disposed with a potential region interposed therebetween, and the one or more discharge driving circuits are end regions in both the upper arm region and the lower arm region, which are arranged in a row. Or it is located in the vicinity.

  According to this configuration, at least one of the discharge driving circuits avoids a different potential region (for example, a low voltage region) interposed between the upper arm region and the lower arm region, and is connected to the end in both arm regions. Located in or near the side area. In other words, the different potential region can be expanded to a region on the end side where the driving circuit for discharging is disposed. Therefore, since the layout on the substrate can be efficiently performed, the substrate can be further downsized.

  According to a fifth aspect of the present invention, the region in which the one or more discharging drive circuits are arranged is connected to a switching element that is driven when discharging the charge accumulated in the capacitor among the plurality of switching elements. It is characterized by including a part. According to this configuration, the wiring distance necessary for connection between the switching element that is driven at the time of discharge and the drive circuit at the time of discharge is shortened. If the wiring distance is shortened, the substrate can be further reduced in size, and the influence on the arrangement and operation of the switching element can be further suppressed.

  According to a sixth aspect of the present invention, the substrate includes a predetermined voltage region to which a predetermined voltage is applied, and a potential difference detection circuit that detects a potential difference between a base potential and the predetermined voltage. The power supply circuit is connected to the potential difference detection circuit, receives power supplied from the potential difference detection circuit, and outputs power necessary for operation of the driving circuit during discharge. According to this configuration, the electric power necessary for outputting electric power from the driving power source during discharge is secured from the potential difference detection circuit, so that a separate power source, a new terminal, and the like are not required. Therefore, the layout on the substrate can be efficiently performed and the cost can be reduced.

  The invention according to claim 7 is characterized in that the one or more discharging drive circuits are located in the vicinity of a region where the potential difference detection circuit is arranged. According to this configuration, the wiring distance necessary for connection between the driving circuit during discharge and the potential difference detection circuit is shortened, and the layout can be efficiently performed. If the wiring distance is shortened, the substrate can be further reduced in size, and the influence on the arrangement and operation of the switching element can be further suppressed.

  According to an eighth aspect of the invention, the plurality of switching elements are divided into an upper arm region and a lower arm region, and the power supply for driving during discharge is connected to the switching elements in the upper arm region. And operating upon receiving electric power supplied to the switching element. According to this configuration, a high voltage (for example, 200 [V] or 650 [V]) is often applied to the switching element in the upper arm region (particularly, the input terminal such as the collector terminal). By connecting to, the power necessary for the operation of the driving power source during discharge is secured. Therefore, a separate power source, a new terminal, and the like are not necessary, and the layout on the board can be efficiently performed and the cost can be reduced.

  According to a ninth aspect of the present invention, the plurality of switching elements are divided into an upper arm region and a lower arm region, and the one or more discharge driving circuits switch the corresponding lower arm region. A base potential of the switching element in the lower arm region corresponding to the element is connected to the element, and the base potential is used as a reference. The “corresponding switching element” means a switching element that is driven by a driving signal transmitted during discharge during driving. According to this configuration, since the driving circuit at the time of discharge is based on the base potential of the switching element in the corresponding lower arm region (particularly, the output terminal such as the emitter terminal), the bases of other switching elements are also used in the same lower arm region. Layout can be performed more efficiently than when the potential is used as a reference. In addition, the accuracy of power (voltage) supplied to the driving circuit during discharge is improved.

It is a circuit diagram which shows the 1st structural example of a power converter device. It is a top view which shows the 1st example of arrangement | positioning of a board | substrate. It is a top view which shows the 2nd example of arrangement | positioning of a board | substrate. It is a top view which shows the 3rd example of arrangement | positioning of a board | substrate. It is a top view which shows the 4th example of arrangement | positioning of a board | substrate. It is a figure which shows the structural example of a double-sided cooling device. It is a circuit diagram which shows the 2nd structural example of a power converter device. It is a top view which shows the 5th example of arrangement | positioning of a board | substrate.

  Below, the form for implementing this invention is demonstrated based on drawing. Unless otherwise specified, “connect” means electrical connection. Further, the continuous code is simplified using the symbol “˜”. For example, “switching elements Q1 to Q6” means “switching elements Q1, Q2, Q3, Q4, Q5, Q6”. When referring to directions such as up, down, left and right, the description in the drawings is used as a reference. An example in which a vehicular generator motor (device capable of both engine starting and power generation) is applied as an output device will be described.

[Embodiment 1]
The present embodiment is an example applied to a power converter that outputs power to one or more generator motors. First, FIG. 1 is a circuit diagram illustrating a first configuration example of the power conversion device. The power conversion device 20 shown in FIG. 1 converts DC power (voltage VH; for example, 650 [V]) supplied from a DC power supply E1 (power supply source) via a converter circuit 10 (boost means) into three-phase AC power. It performs the function of converting and outputting to one or more generator motors (described as “MG” in the drawing) 31, 32,. The voltage VH corresponds to a “predetermined voltage”. In FIG. 1, some elements and circuits are omitted for the sake of simplicity.

  The converter circuit 10 corresponds to a “power supply source” and has a function of boosting and outputting power (voltage VL; for example, 200 [V]) supplied from the DC power supply E1. The voltage VL corresponds to a “predetermined voltage”. A smoothing capacitor C1 (or storage / discharge means such as a capacitor) is connected to the output terminal side of the DC power supply E1. A potential difference detection circuit 20a is connected in parallel to the capacitor C1. The potential difference detection circuit 20a detects DC power (voltage VL) supplied from the DC power supply E1. More specifically, the potential difference between the base potential N and the voltage VL (potential) is detected. Note that when power is directly supplied from the DC power supply E1 without going through the converter circuit 10, the DC power supply E1 corresponds to a “power supply source”. Further, the relationship between the voltage VH and the voltage VL is not necessarily VH> VL, and VH ≦ VL may be satisfied.

  The power conversion device 20 includes a capacitor C2, a potential difference detection circuit 20b, one or more power conversion units 21, 22,... Provided corresponding to each generator motor. Since the power conversion units 21, 22,... Have the same configuration, the power conversion unit 21 will be described below as a representative.

  The smoothing capacitor C <b> 2 (or storage / discharge means such as a capacitor) is connected to the output terminal side of the converter circuit 10. A potential difference detection circuit 20b is connected in parallel to the capacitor C2. The potential difference detection circuit 20b detects DC power (voltage VH) supplied from the converter circuit 10. More specifically, the potential difference between the base potential N and the voltage VH (potential) is detected.

  The power conversion unit 21 is configured to be able to realize one or both of a power feeding function and a power transmission function. The power feeding function is a function of converting DC power (voltage VH) supplied from the DC power supply E1 through the converter circuit 10 into three-phase AC power and supplying the converted power to the generator motor 31. The power transmission function is a function of rectifying the three-phase AC power generated by the generator motor 31 and returning it to the DC power source E <b> 1 via the converter circuit 10.

  The power converter 21 includes normal-time drive circuits M1a to M6a, discharge-time drive circuits M1b to M6b, sneaking prevention means B1 to B6, switching elements Q1 to Q6, diodes D1 to D6, resistors R1 to R6, and the like. Among these, the normal driving circuits M1a to M3a, the discharging driving circuits M1b to M3b, the sneak prevention means B1 to B3, the switching elements Q1 to Q3, the diodes D1 to D3, the resistors R1 to R3, etc. are arranged on the upper arm side. Is done. The normal driving circuits M4a to M6a, the discharging driving circuits M4b to M6b, the sneak prevention means B4 to B6, the switching elements Q4 to Q6, the diodes D4 to D6, and the resistors R4 to R6 are arranged on the lower arm side.

  The normal driving circuits M1a to M3a operate by receiving power (voltage Va) supplied from the normal driving power supply 40 using the output terminals (emitter terminals) of the corresponding switching elements Q1 to Q3 as reference potentials. The normal driving circuits M4a to M6a operate by receiving electric power (voltage Vc) supplied from the normal driving power supply 40 using the output terminals (emitter terminals) of the corresponding switching elements Q4 to Q6 as a reference potential. These normal-time drive circuits M1a to M6a correspond to switching elements corresponding to command signals individually input from the controller 60 to the signal input terminals P1a to P6a in normal time (time or period when normal power conversion is performed). A drive signal is output to the control terminals (gate terminals) of Q1 to Q6.

  The discharge driving circuits M1b to M3b operate by receiving electric power (voltage Vb) supplied from the discharge driving power supply 50 using the output terminals (emitter terminals) of the switching elements Q1 to Q3 as a reference potential. The discharge driving circuits M4b to M6b operate by receiving electric power (voltage Vd) supplied from the discharge driving power source 50 using the output terminals (emitter terminals) of the switching elements Q4 to Q6 as a reference potential. These discharge driving circuits M1b to M6b are individually connected to the signal input terminals P1b to P6b from the controller 60 at the time of discharging (a time other than the normal time, in which the charge accumulated in the capacitor C2 is discharged), respectively. In accordance with the input command signal, a driving signal is output to the control terminals (gate terminals) of the corresponding switching elements Q1 to Q6.

  One normal power supply 40 may be provided (see FIG. 1), or a plurality of normal power supplies 40 may be provided for each normal drive circuit M1a to M6a. The same applies to the driving power source 50 at the time of discharging, and one embodiment may be provided (see FIG. 1), or a plurality may be provided corresponding to each of the discharging driving circuits M1b to M6b. The voltages Va, Vb, Vc, and Vd described above are not limited to the same voltage, but may be different voltages depending on the difference in the reference potential.

  The wraparound prevention means B1 to B6 are provided corresponding to the discharge driving circuits M1b to M6b. In other words, no wraparound prevention means is required for the phase or arm in which the driving circuit for discharging is not provided. The wraparound prevention means B1 to B6 have a function of blocking a drive signal that attempts to wrap around from one drive circuit to the other drive circuit among the normal drive circuit and the discharge drive circuit. The wraparound prevention means B1 to B6 are connected to be interposed between the normal driving circuit and the switching element and between the discharging driving circuit and the switching element. Each wraparound prevention means B1 to B6 is configured by using a switch (with or without a contact), a rectifying element, a switching element, a transistor (including a MOS transistor or FET), a diode, a varistor, a thyristor, and the like, and driving at the time of discharging It is desirable to provide it corresponding to the circuit. As described above, the normal drive circuit and the discharge drive circuit may be configured separately, or may be included in the normal drive circuit and the discharge drive circuit.

  The switch Sw has a function of switching power reception (on) / non-power reception (off) for the power supplied from the DC power supply E1. The switch Sw is preferably connected between the DC power source E1 and the capacitor C1, and is an element that can be controlled to be turned on / off from the controller 60 or the like. At the time of discharging, the electric charge accumulated in the capacitor C2 is discharged. However, if power is continuously supplied from the power supply source Es, the capacitor C2 cannot be discharged. Therefore, at the time of discharging, the switch Sw is switched to non-power receiving (off) so that the charge accumulated in the capacitor C2 can be discharged.

  Note that the above-described discharge driving circuits M1b to M6b and the wraparound prevention means B1 to B6 only have to include at least one in the power conversion unit 21, respectively. In this embodiment, as shown in FIG. 1, an example in which drive circuits M2b and M5b at the time of discharge and wraparound prevention means B2 and B5 are provided is shown. In the second and third embodiments to be described later, an example in which the discharge driving circuits M3b and M6b and the wraparound prevention means B3 and B6 are provided will be described. Further, in a fourth embodiment to be described later, an example in which discharge-time drive circuits M1b and M4b and wraparound prevention means B1 and B4 are provided will be described. As described above, the discharge driving circuit and the sneak preventing means may be any of the two phases (for example, the U phase and the V phase) to be selected from the U phase only, the V phase only, the W phase only, or all three phases. You can prepare with.

  As the switching elements Q1 to Q6, for example, an IGBT including sense terminals Ps1 to Ps6 that output a sense current is used. Resistors R4 to R6 are connected between the sense terminals Ps4 to Ps6 and the base potential N, respectively. Resistors R1 to R3 are connected to output terminals (emitter terminals) of corresponding switching elements Q1 to Q3, respectively. The base potential N is a common potential (same potential ground) in the power conversion device 20, and becomes 0 [V] when grounded.

  The circuit elements in the power converter 21 are divided into three phases (U phase, V phase, and W phase in this embodiment), and the operation is controlled for each phase by the controller 60. The U-phase corresponds to the high-voltage system regions 111 and 114, and is composed of normal driving circuits M1a and M4a, discharging driving circuits M1b and M4b, switching elements Q1 and Q4, diodes D1 and D4, resistors R1 and R4, and the like. . The V phase corresponds to the high voltage system regions 112 and 115, and is composed of normal driving circuits M2a and M5a, discharging driving circuits M2b and M5b, switching elements Q2 and Q5, diodes D2 and D5, resistors R2 and R5, and the like. . The W phase corresponds to the high voltage system regions 113 and 116, and is composed of normal driving circuits M3a and M6a, discharging driving circuits M3b and M6b, switching elements Q3 and Q6, diodes D3 and D6, resistors R3 and R6, and the like. . The U-phase switching elements Q1 and Q4 are connected in series to form a half bridge. Similarly, the V-phase switching elements Q2 and Q5 and the W-phase switching elements Q3 and Q6 are connected in series to form a half bridge. Each connection point of the half bridge and the three-phase terminal of the generator motor 31 are connected for each phase by lines Ku, Kv, Kw. A U-phase current Iu flows through the line Ku, a V-phase current Iv flows through the line Kv, and a W-phase current Iw flows through the line Kw.

  The controller 60 corresponds to a “drive signal generation circuit”, and is responsible for overall operations of the converter circuit 10, the power converter 20, and the like. That is, based on the input signal information, a command signal for individually controlling on / off of a switching element provided in the converter circuit 10 or a switching element provided in the power conversion device 20 is output. Signal information includes signals transmitted from an external ECU (including an external control device equivalent to this) (for example, torque commands), state detection information (for example, sense voltage, temperature, gate voltage, terminal voltage, etc.), A detection signal transmitted from a detector (for example, a voltmeter, an ammeter, a resolver, etc.) provided in the generator motor 31 is applicable. Further, signal information is output to the external ECU, and an operation signal is output to the detector.

  As long as each function described above is performed, the controller 60 may be arbitrarily configured. For example, a software control may be performed by a CPU (including a microcomputer), or a hardware control may be performed using an electronic component such as an IC (including an LSI or a gate array) or a transistor.

  The power conversion unit 21 configured as described above operates as follows. Under normal conditions, driving signals from the normal driving circuits M1a to M6a are driven to the control terminals (gate terminals) of the switching elements Q1 to Q6 based on command signals individually input from the controller 60 to the signal input terminals P1a to P6a. The signal is transmitted, and the electric power supplied from the converter circuit 10 is converted and output to the generator motor 31. At the time of discharging, the driving signal is driven to the control terminals (gate terminals) of the switching elements Q1 to Q6 from the driving circuits M2b and M5b at the time of discharging based on command signals individually input from the controller 60 to the signal input terminals P1b to P6b. The signal for use is transmitted, and the electric charge accumulated in the capacitor C2 is discharged. Since the wraparound prevention means B2 and B5 are interposed, it is possible to prevent the drive signal from wrapping from one drive circuit to the other drive circuit among the normal drive circuits M2a and M5a and the discharge drive circuits M2b and M5b. .

  An example in which the components of the power conversion device 20 described above are arranged on a substrate will be described with reference to FIG. FIG. 2 shows a first example of the arrangement of the substrates in a plan view, but since all the elements shown in FIG. 1 cannot be shown, only the elements necessary for explanation are shown (the same applies to FIGS. 3 to 5 described later).

  A substrate 100 shown in FIG. 2 includes a driving power source 50 during discharge, high voltage system regions 111 to 116, a low voltage system region 120, connection parts J1 to J6, and the like. The low-pressure system region 120 is formed in, for example, a “U” shape, and includes a connector 130 that connects to an external ECU (control device). A low voltage (for example, 12 [V] or the like) is applied to the low-voltage system region 120 with reference to the ground potential (GND).

  Each of the high voltage system regions 111 to 116 corresponds to a “predetermined voltage region”. In the high-pressure system region 111, a connection portion J1 connected to a module 141 (see FIG. 6) described later is disposed. Similarly, connection portions J2 to J6 that are connected in order to modules 142 to 146 (see FIG. 6), which will be described later, are arranged in the high-pressure system regions 112 to 116, respectively. A driving circuit M2b at the time of discharge is disposed in the high voltage system region 112, and a driving circuit M5b at the time of discharge is disposed in the high voltage system region 115. An insulating element Za is disposed between the high-voltage system region 112 and the high-voltage system region 115. As the insulating element Za, an element capable of transmitting electric power or a signal while ensuring insulation is used. For example, a transformer, a photocoupler, or the like is applicable. The discharge driving power supply 50 is disposed between the high voltage system region 112 and the high voltage system region 113 and is connected to the high voltage system region 115. The discharge driving power source 50 and the discharge driving circuits M2b and M5b correspond to the FMVSS circuit.

  In the substrate 100 arranged as described above, the electric power supplied from the driving power source 50 at the time of discharging is transmitted from the driving circuit M5b at the time of discharge → the insulating element Za → the driving circuit M2b at the time of discharging, as indicated by a thick solid line. The controller 60 may be disposed in any one of the low-pressure system region 120 and the high-pressure system region 111 to 116, and may be disposed through a connector 130 after being disposed on a substrate or device other than the substrate 100.

  According to the first embodiment described above, an effect corresponding to claim 1 is obtained. That is, in the substrate 100, the discharge driving circuits M2b and M5b are disposed in the high voltage system regions 112 and 115 (specific regions) including the connecting portions J2 and J5, respectively, and the discharge driving power source 50 is disposed in the vicinity of the specific region. It was set as the structure (refer FIG. 2). According to this configuration, the wiring distance necessary for connection between the discharge drive circuits M2b and M5b and the discharge drive power supply 50 is shortened. If the wiring distance is shortened, the substrate 100 can be reduced in size, and the influence on the arrangement and operation of the switching elements Q1 to Q6 can be suppressed. Also, as shown in FIG. 1, the switching elements Q1 to Q3 in the upper arm region and the switching elements Q4 to Q6 in the lower arm region are divided, and nothing is arranged between the upper arm region and the lower arm region. If not, the substrate 100 can be made smaller.

[Embodiment 2]
The second embodiment is an example in which a substrate is arranged separately from the first embodiment. The second embodiment will be described with reference to FIG. In FIG. 3, the 2nd example of arrangement | positioning of a board | substrate is shown with a top view. Note that an example of the circuit configuration of the power conversion device 20 and the like is the same as that of FIG. In the second embodiment, the points different from the first embodiment will be described in order to simplify the illustration and description, and the same elements as those used in FIG. 1 and FIG. Omitted.

  The substrate 100 shown in FIG. 3 is an arrangement example that replaces the substrate 100 shown in FIG. 2, and is different in the following five points. The first point is that the high voltage system region 113 is provided with a discharge driving circuit M3b, and the high voltage system region 116 is provided with a discharge driving circuit M6b. The second point is that the insulating element Zb is disposed between the high-voltage system region 113 and the high-voltage system region 116, and the insulating element Zc is disposed between the high-pressure system region 116 and the low-voltage system region 120. As the insulating elements Zb and Zc, elements capable of transmitting electric power, signals and the like while ensuring insulation are used, and elements equivalent to the insulating element Za shown in FIG. 2 are used. The third point is that the driving power source 50 for discharge is disposed so as to be surrounded by the high voltage system region 113, the high voltage system region 116, and the low voltage system region 120, and occupies a part of the high voltage system region 116. The fourth point is that one or both of the potential difference detection circuit 20 b and the potential difference detection circuit 20 a (hereinafter simply referred to as “potential difference detection circuit 20 b or the like”) is disposed in the low voltage system region 120 close to the high voltage system region 113. The fifth point is that the potential difference detection circuit 20b and the like are connected to the driving power source 50 at the time of discharging, and the power source 50 for driving at the time of discharging is a supply source necessary for outputting power. The discharge driving power supply 50 and the discharge driving circuits M3b and M6b correspond to the FMVSS circuit.

  In the substrate 100 arranged as described above, the electric power supplied from the potential difference detection circuit 20b or the like is given by the discharge driving power source 50 → the discharging drive circuit M6b → the insulating element Zb → the discharging drive circuit M3b, as shown by a thick solid line. Communicated. The drive signal output from the controller 60 is transmitted to the module 146 (switching element Q6) via the insulating element Zc → the discharging driving circuit M6b → the connecting portion J6 as shown by a thick broken line, and is insulated in parallel. It is transmitted to the module 143 (switching element Q3) via the element Zc → the driving circuit M6b at discharge → the insulating element Zb → the driving circuit M3b at discharge → the connection portion J3.

  According to the second embodiment described above, the following effects can be obtained. First, corresponding to claim 2, the discharge driving circuits M3b and M6b are arranged in the high-voltage system regions 113 and 116 including the connection portions J3 and J6 located in the vicinity of the region where the controller 60 is arranged (see FIG. 3). According to this configuration, the wiring distance required for connection between the controller 60 and the discharge driving circuits M3b and M6b is shortened. If the wiring distance is shortened, the substrate 100 can be further miniaturized, and the influence on the arrangement and operation of the switching elements Q3 and Q6 can be further suppressed.

  Corresponding to claim 6, the substrate 100 includes high voltage system regions 111 to 116 to which the voltage VH is applied, a potential difference detection circuit 20b for detecting the voltage VH, and the like. It is connected to 20b etc., receives the electric power supplied from the electric potential difference detection circuit 20b etc., and outputs the electric power required for operation | movement of the drive circuits M1b-M6b at the time of discharge. According to this configuration, power necessary for outputting power from the driving power supply 50 at the time of discharge is secured from the potential difference detection circuit 20b and the like, so that a separate power source, a new terminal, and the like are not required. Therefore, the layout on the substrate 100 can be efficiently performed and the cost can be reduced.

  Corresponding to the seventh aspect, the discharge driving circuits M2b and M5b are configured to be located in the vicinity of the region where the potential difference detection circuit 20b and the like are disposed (see FIG. 3). According to this configuration, the wiring distance necessary for connection between the discharge driving circuits M2b and M5b and the potential difference detection circuit 20b is shortened, and the layout can be efficiently performed. If the wiring distance is shortened, the substrate 100 can be further miniaturized, and the influence on the arrangement and operation of the switching elements Q1 to Q6 can be further suppressed.

[Embodiment 3]
The third embodiment is an example in which a substrate is arranged separately from the first embodiment. The third embodiment will be described with reference to FIG. FIG. 4 is a plan view showing a third arrangement example of the substrates. Note that an example of the circuit configuration of the power conversion device 20 and the like is the same as that of FIG. In the third embodiment, the points different from the second embodiment will be described in order to simplify the illustration and description, and the same elements as those used in FIGS. Omitted.

  A substrate 100 illustrated in FIG. 4 is an arrangement example instead of the substrate 100 illustrated in FIG. 3. Although the driving power source 50 for discharging is arranged so as to be surrounded by the high voltage system region 113, the high voltage system region 116, and the low voltage system region 120, the driving power source 50 for discharging outputs power. The difference is that the supply source necessary for the connection is the connection portion J3. A module 143, which will be described later, is connected to the connection portion J3 (see FIG. 5), and a power equivalent to the power supplied from the converter circuit 10 is supplied to a specific terminal of the module 143 (particularly the collector terminal of the switching element Q3). (Voltage VH shown in FIG. 1) is applied. Then, it connects with the site | part connected with the said specific terminal among the connection parts J3.

  In the substrate 100 arranged as described above, the power supplied from the connection portion J3 connected to the specific terminal of the module 143 is, as indicated by a thick solid line, the driving power source 50 for discharging → the driving circuit M6b for discharging → the insulating element Zb. → Transmitted to drive circuit M3b during discharge. As indicated by a thick broken line, the driving signal output from the discharge driving circuit M3b is transmitted to the module 143 (switching element Q3), and the driving signal output from the discharging drive circuit M6b is the module 146 (switching element). Q6).

  According to the third embodiment described above, corresponding to claim 8, the switching elements Q1 to Q3 are arranged in the upper arm high voltage system regions 111 to 113, and the switching elements Q4 to Q6 are arranged in the lower arm high voltage system region. It was set as the structure arrange | positioned at 114-116 (refer FIG. 2). Further, the driving power source 50 at the time of discharging is connected to the switching element Q3 via the connection portion J3 of the high voltage system region 113, and is configured to operate by receiving electric power supplied to the switching element Q3 (see FIG. 4). ). According to this configuration, the power necessary for the operation of the driving power source 50 at the time of discharge is secured by connecting to the switching element Q3. Therefore, a separate power source, a new terminal, and the like are not necessary, and the layout on the substrate 100 can be efficiently performed and the cost can be reduced.

[Embodiment 4]
The fourth embodiment is an example in which a substrate is arranged separately from the first embodiment. The fourth embodiment will be described with reference to FIG. FIG. 5 is a plan view showing a third arrangement example of the substrates. Note that an example of the circuit configuration of the power conversion device 20 and the like is the same as that of FIG. In the fourth embodiment, for the sake of simplicity of illustration and description, points different from the first embodiment will be described, and the same elements as those used in FIGS. Omitted.

  The substrate 100 shown in FIG. 5 is an arrangement example that replaces the substrate 100 shown in FIG. 2, and is different in the following five points. The first point is that the low-pressure system region 120 is formed in a shape in which the “T” shape is rotated 90 degrees to the right. Along with this formation, the second point divides the high pressure system regions 111 to 113 and the high pressure system regions 114 to 116 in the vertical direction, and interposes the low pressure system region 120 therebetween. The third point is that the insulating element Zd is disposed between the high voltage system region 111 and the high voltage system region 112. As the insulating element Zd, an element capable of transmitting electric power or a signal while ensuring insulation is used, and an element equivalent to the insulating element Za shown in FIG. 2 is used. The fourth point is arranged such that the driving power source 50 at the time of discharge is surrounded by the tip portions of the high voltage system region 111, the high voltage system region 112 and the low voltage system region 120, and occupies a part of the high voltage system region 112. The fifth point is that the discharge driving circuit M1b is arranged in the high voltage system region 111 and the discharge driving circuit M4b is arranged in the high voltage system region 114. The discharge driving power supply 50 and the discharge driving circuits M1b and M4b correspond to the FMVSS circuit.

  In the substrate 100 arranged as described above, the power supplied from the driving power source 50 at the time of discharge is transmitted from the driving circuit M4b at the time of discharge → the insulating element Zd → the driving circuit at the time of discharging M1b, as shown by the bold solid line, and driven at the time of discharging. The voltage is transmitted to the driving circuit M4b during discharge through the high voltage system region 114 connected to the power source 50.

  According to the fourth embodiment described above, the following effects can be obtained. Corresponding to claim 4, the substrate 100 has a configuration in which the high-pressure system regions 111 to 113 and the high-pressure system regions 114 to 116 are divided and the low-pressure system region 120 is interposed therebetween (see FIG. 5). Further, the discharge driving circuits M1b and M4b are disposed in the high voltage system regions 111 and 114 (specific regions) including the connecting portions J1 and J4, respectively, and the discharge driving power source 50 is disposed in the vicinity of the specific regions. (See FIG. 5). According to this configuration, the low-voltage system region 120 (different potential region) can be expanded to the region on the left end side where the discharge driving circuits M1b and M4b are disposed. Therefore, since the layout on the substrate 100 can be performed efficiently, the substrate 100 can be further downsized.

  Corresponding to claim 5, the high-voltage system regions 111 and 114 in which the discharge driving circuits M1b and M4b are arranged include connection portions J1 and J4 connected to the switching elements Q1 and Q4 (see FIG. 5). According to this configuration, the wiring distance necessary for connection between the switching elements Q1 to Q6 that are driven at the time of discharge and the drive circuits M1b to M6b at the time of discharge is shortened. If the wiring distance is shortened, the substrate 100 can be further miniaturized, and the influence on the arrangement and operation of the switching elements Q1 to Q6 can be further suppressed.

  Corresponding to claim 9, switching elements Q1 to Q3 are arranged in high voltage system regions 111 to 113 (upper arm region), and switching elements Q4 to Q6 are arranged in high voltage system regions 114 to 116 (lower arm region). It was set as the structure (refer FIG. 5). Further, the discharge driving circuit M4b is connected to the corresponding lower arm switching element Q4, and is configured to be based on the base potential N which is the output terminal (emitter terminal) of the corresponding lower arm switching element Q4 (FIG. 1). See). According to this configuration, since the discharge driving circuit M4b uses the base potential N of the switching element Q4 in the corresponding lower arm region as a reference, the base potential N of the other switching elements Q5 and Q6 is set in the same lower arm region. Layout can be performed more efficiently than in the case of using as a reference. In addition, the accuracy of power (voltage) supplied to the driving circuit M4b during discharge is improved.

[Embodiment 5]
The fifth embodiment is an example that is applied to any of the first to fourth embodiments described above and further includes a double-sided cooling device. The fifth embodiment will be described with reference to FIG. FIG. 5A shows a side view seen from the side of the substrate and a plan view seen from above the substrate. In the fifth embodiment, the points different from the first to fourth embodiments will be described in order to simplify the illustration and description, and the same elements as those used in FIGS. 1 to 5 are denoted by the same reference numerals. Description is omitted.

  The cooling device 200 shown in FIG. 5 corresponds to a “double-sided cooling device”. The cooling device 200 has a structure in which cooling is performed from both sides of the switching elements Q1 to Q6 via modules 141 to 146. Each module is a package of one switching element and a circuit element that operates the one switching element (that is, one or more elements such as a diode, a drive circuit, and a resistor). The modules 151 to 156 illustrated by the two-dot chain line correspond to the corresponding switching elements Q1 to Q6 when the power converter 22 illustrated by the two-dot chain line in FIG. 1 is provided. Modules 140 and 150 correspond to switching elements used in converter circuit 10. Hereinafter, all these modules are described as “modules 141 to 146 etc.”.

  The cooling device 200 includes one upstream pipe 201, a plurality (5 or 8 in this embodiment) of connecting pipes 202, one downstream pipe 203, and the like. The connecting pipe 202 connects the upstream pipe 201 and the downstream pipe 203, and the connecting pipe 202 is spaced from the module 141 to 146. The upstream pipe 201, the plurality of connecting pipes 202, and the downstream pipe 203 are formed so that a cooling fluid (for example, water, air, oil, etc.) flows inside. The cooling fluid sent out by a circulation pump (not shown) flows through the upstream pipe 201 in the direction toward the connecting pipe 202 (arrow D1 direction), branches, and flows into the downstream pipe 203 (arrow D2 direction). 202, and flows through the downstream pipe 203 in the direction toward the circulation pump (in the direction of arrow D3).

  The upstream pipe 201 and the downstream pipe 203 may be formed of arbitrary materials using arbitrary materials. On the other hand, since the plurality of connecting pipes 202 perform a cooling function, a material having high thermal conductivity (for example, metal) is used, and an outer shape is formed so as to come into contact with the modules 141 to 146 and the like. In consideration of the point that the cooling efficiency increases as the contact area increases and the formation cost is kept low, it is desirable to form each contact surface of the connecting pipe and the module in a plane. As shown in the figure, modules having upper arm switching elements (for example, modules 141 to 143) are more likely to generate heat than modules having lower arm switching elements, so they are arranged on the upstream pipe 201 side. Is desirable.

  According to the fifth embodiment described above, an effect corresponding to claim 3 is obtained. That is, it was set as the structure provided with the cooling device 200 (double-sided cooling device) which cools from the both surfaces side of switching element Q1-Q6 (refer FIG. 6). According to this configuration, the switching elements Q1 to Q6 can be efficiently cooled by using the cooling device 200. In particular, when the low voltage system region 120 is not interposed between the high voltage system regions 111 to 113 and the high voltage system regions 114 to 116 as in the first to third embodiments, the layout on the substrate 100 can be performed efficiently.

[Embodiment 6]
The sixth embodiment is an example applied to a circuit different from the first embodiment. The sixth embodiment will be described with reference to FIGS. In FIG. 7, the 2nd structural example of a power converter device is shown with a circuit diagram. In FIG. 8, the 5th example of arrangement | positioning of a board | substrate is shown with a top view. In addition, about the element same as the element shown in FIG. 1, description of a function effect | action is abbreviate | omitted by using the same code | symbol.

  The power converter 70 shown in FIG. 7 realizes a boost function that boosts and outputs the power (voltage VL) supplied from the DC power supply E1, so that the normal drive circuits Mua and Mda and the discharge drive circuits Mub and Mdb are output. , Wraparound prevention means Bu, Bd, switching elements Qu, Qd, diodes Du, Dd, inductor L10, and the like. The DC power supply E1 corresponds to a “power supply source”. The power conversion device 70 can be applied as the converter circuit 10 shown in FIG.

  The normal driving circuit Mua operates by receiving power (voltage Va) supplied from the normal driving power supply 40 with the output terminal (emitter terminal) of the switching element Qu as a reference potential. The normal drive circuit Mda operates by receiving power (voltage Vc) supplied from the normal drive power supply 40 using the output terminal (emitter terminal) of the switching element Qd as a reference potential. These normal-time drive circuits Mua and Mda respectively send drive signals to the control terminals (gate terminals) of the corresponding switching elements Qu and Qd in accordance with command signals individually input from the controller 60 to the signal input terminals Pua and Pda. Output.

  The discharge driving circuit Mub and the output terminal (emitter terminal) of the switching element Qu are operated as a reference potential by receiving electric power (voltage Vb) supplied from the discharge driving power source 50. The discharge drive circuit Mdb operates by receiving power (voltage Vd) supplied from the discharge drive power supply 50 using the output terminal (emitter terminal) of the switching element Qd as a reference potential. These discharge-time drive circuits Mub and Mdb respectively send drive signals to the control terminals (gate terminals) of the corresponding switching elements Qu and Qd according to command signals individually input from the controller 60 to the signal input terminals Pub and Pdb. Output. The voltages Va, Vb, Vc, and Vd described above are not limited to the same voltage, but may be different voltages depending on the difference in the reference potential.

  The wraparound prevention means Bu has the same configuration and operational effects as the wraparound prevention means B1 to B3 shown in the first embodiment. The wraparound prevention means Bd has the same configuration and operational effects as the wraparound prevention means B4 to B6 shown in the first embodiment. These wraparound prevention means Bu and Bd are provided corresponding to the discharge driving circuit.

  The switching elements Qu and Qd are connected in series to form a half bridge. As the switching elements Qu and Qd, for example, an IGBT including sense terminals Psu and Psd for outputting a sense current is used. A resistor Rd is connected between the sense terminal Psd and the base potential N. The resistor Ru is connected between the sense terminal Psu and an intermediate connection point between the input terminal (such as a source terminal or a collector terminal) of the switching element Qd. This intermediate connection point is further connected to the plus electrode of the DC power supply E1 via the inductor L10. For this inductor L10, for example, a choke coil is used. The diodes Du and Dd connected in parallel to the switching elements Qu and Qd function as freewheel diodes, respectively. The output terminal (emitter terminal) of the switching element Qd is connected to the negative electrode (that is, the base potential N) of the DC power supply E1.

  Other than the power conversion device 70, there are a switch Sw, capacitors C1 and C2, potential difference detection circuits 20a and 20b, and the like. The switch Sw has a function of switching power reception (on) / non-power reception (off) for the power supplied from the DC power supply E1. The switch Sw is preferably connected between the DC power source E1 and the capacitor C1, and is an element that can be controlled to be turned on / off from the controller 60 or the like. In addition, as shown with a dashed-two dotted line, you may connect between the output terminal side of the power converter device 70, and the capacitor | condenser C2, and you may connect by both. The smoothing capacitor C1 is connected to both ends (between the plus electrode and the minus electrode) of the DC power supply E1. The smoothing capacitor C <b> 2 is connected to both ends of the output side of the power converter 70. The potential difference detection circuit 20a is connected in parallel with the capacitor C1, and the potential difference detection circuit 20b is connected in parallel with the capacitor C2. One or both of the switch Sw and the capacitor C <b> 1 may be included in the power conversion device 70.

  An example in which the components of the power conversion device 70 described above are arranged on a substrate will be described with reference to FIG. FIG. 8 shows a fifth example of the arrangement of the substrates in a plan view, but not all the elements shown in FIG. 7 and FIG. 1 can be shown, so only the elements necessary for explanation are shown.

  A substrate 100 shown in FIG. 8 is an arrangement example instead of the substrate 100 shown in FIG. A substrate 100 shown in FIG. 8 includes a driving power source 50 during discharge, high voltage system regions 111 to 118, a low voltage system region 120, connection portions J1 to J6, Ju, and Jd. Among these elements, the driving power source 50 during discharge, the high voltage system regions 111 to 118, the low voltage system region 120, and the connecting portions J1 to J6 are components of the inverter circuit (the power conversion device 20 shown in the first embodiment). This is the same as in the first embodiment. Therefore, below, the element relevant to the power converter device 70 is demonstrated.

  Each of the high voltage system regions 117 and 118 corresponds to a “predetermined voltage region”. In the high-voltage system region 117, a discharge driving circuit Mub, a connection portion Ju connected to the module 140 (see FIG. 6), and the like are arranged. Similarly, in the high voltage system region 118, a driving circuit Mdb at the time of discharge, a connection portion Jd connected to the module 150 (see FIG. 6), and the like are arranged. The discharge driving power supply 50 is disposed between the high voltage system region 117 and the high voltage system region 118 and is connected to the high voltage system region 118. The discharge driving power source 50 and the discharge driving circuits Mub, Mdb and the like correspond to FMVSS circuits.

  In the substrate 100 arranged as described above, the electric power supplied from the driving power source 50 at the time of discharge is transmitted from the driving circuit Mdb at the time of discharge to the insulating element Za → the driving circuit at the time of discharge Mub as shown by a thick solid line. The controller 60 may be disposed in any of the low-pressure system region 120 and the high-pressure system regions 111 to 118, and may be connected through the connector 130 after being disposed on a board or device other than the board 100.

  According to the above-described sixth embodiment, corresponding to claim 1, the discharge-time driving circuits Mub and Mdb are arranged in the high-voltage system regions 117 and 118 (specific regions) including the connection portions Ju and Jd, respectively, and the specific region The power supply 50 for driving at the time of discharge is arranged in the vicinity of (see FIG. 8). According to this configuration, the wiring distance necessary for connection between the discharge driving circuits Mub and Mdb and the discharge driving power supply 50 is shortened. If the wiring distance is shortened, the substrate 100 can be reduced in size, and the influence on the arrangement and operation of the switching elements Qu and Qd can be suppressed. Further, as shown in FIG. 8, the switching elements Q1 to Q3 and Qu in the upper arm region and the switching elements Q4 to Q6 and Qd in the lower arm region are divided into the area between the upper arm region and the lower arm region. If nothing is arranged on the substrate 100, the substrate 100 can be further downsized.

  In FIG. 8, the high-pressure system regions 117 and 118 are arranged in the corresponding region of the first embodiment (that is, the region corresponding to the high-pressure system regions 112 and 115 shown in FIG. 2). Instead of this form, the high pressure system regions 117 and 118 may be arranged in the corresponding regions of the second to fourth embodiments. Specifically, the high-pressure system regions 117 and 118 are arranged in the corresponding region of the second and third embodiments (that is, the region corresponding to the high-pressure system regions 113 and 116 shown in FIGS. 3 and 4), or the fourth embodiment. The high pressure system regions 117 and 118 are arranged in the corresponding region (that is, the region corresponding to the high pressure system regions 111 and 114 shown in FIG. 5). In the substrate 100 having these arrangements, it is possible to obtain the same operational effects (that is, operational effects corresponding to claims 2 to 9) as the operational effects obtained in the corresponding embodiments.

[Other Embodiments]
In the above, although the form for implementing this invention was demonstrated according to Embodiment 1-6, this invention is not limited to the said form at all. In other words, various forms can be implemented without departing from the scope of the present invention. For example, the following forms may be realized.

  In the first to sixth embodiments described above, three-phase generator motors 31, 32,... Are applied as output devices (see FIG. 1). It replaces with this form, and other outputs which can receive and operate | move the electric power output from the power converters 20 (specifically the power converters 21, 22, ...) irrespective of the number of phases and generator motors other than three phases. Equipment may be applied. Examples of other output devices include one or more of a rotating machine (that is, a generator, a motor, and the like), a power system, a load, and the like. Even generator motors and other output devices other than the three-phase can be operated by the power conversion device 20, so that the same effects as those of the first to sixth embodiments described above can be obtained.

  In the first to sixth embodiments described above, IGBTs having sense terminals are applied as the switching elements Q1 to Q6 and the like (see FIGS. 1 to 11). Instead of this form, another semiconductor element having a switching function may be applied. Other semiconductor elements include IGBTs without sense terminals, power MOSFETs, and the like. Since the types of switching elements are merely different, the same operational effects as those of the first to sixth embodiments can be obtained.

  The substrate 100 shown in the first embodiment described above has the discharge driving circuits M2b and M5b disposed in the high voltage system regions 112 and 115 (specific regions) including the connecting portions J2 and J5, respectively, and in the vicinity of the specific region during the discharge. A driving power supply 50 is arranged (see FIG. 2). Instead of this form, it may be arranged near or connected to another region. The other regions correspond to the high-pressure system regions 111 and 114, the high-pressure system regions 113 and 116, and the like. Further, the upper arm and the lower arm may be interchanged, and the U phase, V phase, and W phase may be interchanged. Regardless of the arrangement, the same operational effects as those of the first embodiment described above can be obtained.

  The substrate 100 described in the second embodiment is configured such that the discharge-time driving circuits M3b and M6b are disposed in the high-voltage system regions 113 and 116 including the connection portions J3 and J6 close to the region in which the controller 60 is disposed ( (See FIG. 3). Instead of this form, the driving power source 50 at the time of discharging may be arranged in the vicinity of another region. The other regions correspond to the high-pressure system regions 111 and 114, the high-pressure system regions 112 and 115, and the like. Further, the upper arm and the lower arm may be interchanged, and the U phase, V phase, and W phase may be interchanged. Regardless of the arrangement, the same operational effects as those of the first and second embodiments can be obtained.

  In the substrate 100 shown in the above-described third embodiment, the driving power source 50 at the time of discharging is connected to the switching element Q3 via the connection portion J3 of the high voltage system region 113, and operates by receiving power supplied to the switching element Q3. (See FIG. 4). Instead of this form, the driving power source 50 at the time of discharging may be arranged in the vicinity of another region. The other regions correspond to the high-pressure system regions 111 and 114, the high-pressure system regions 112 and 115, and the like. Further, the upper arm and the lower arm may be interchanged, and the U phase, V phase, and W phase may be interchanged. Regardless of the arrangement, the same operational effects as those of the first to third embodiments can be obtained.

  Substrate 100 shown in the above-described fourth embodiment arranges discharge driving circuits M1b and M4b in high-voltage system regions 111 and 114 (specific regions) including connecting portions J1 and J4, respectively, and discharges in the vicinity of the specific region. A driving power supply 50 is arranged (see FIG. 5). Instead of this form, the driving power source 50 at the time of discharging may be arranged in the vicinity of another region. That is, an example in which the high-pressure system regions 112 and 115, the high-pressure system regions 113 and 116, and the like are disposed in the high-pressure system regions 111 and 114 is applicable. Further, the upper arm and the lower arm may be interchanged, and the U phase, V phase, and W phase may be interchanged. Regardless of the arrangement, the same effects as those of the first and fourth embodiments can be obtained.

  In Embodiment 5 mentioned above, the cooling device 200 which cools from the both surfaces side of a switching element was applied (refer FIG. 6). Instead of this form, another cooling device for cooling the switching element may be applied. For example, a single-sided cooling device that cools from one side of each switching element, a cooling device that cools in contact with each switching element (for example, a Peltier Device), other heat pumps (for example, a gas liquefied heat pump), and the like are applicable. . Even if it is another cooling device, since each switching element is cooled and operation | movement can be stabilized, the effect similar to Embodiment 1-6 mentioned above can be acquired.

E1 DC power supply (power supply source)
10 Converter circuit (power supply source)
20, 70 Power conversion device 20a, 20b Potential difference detection circuit 21, 22, ... Power conversion unit 31 Generator motor (output device)
40 Power supply for normal driving 50 Power supply for discharging 60 Controller (Drive signal generation circuit)
100 Substrate 111-118 High voltage system region (predetermined voltage region)
120 Low pressure system 200 Cooling device (double-sided cooling device)
B1-B6, Bu, Bd Anti-wraparound means C1, C2 Capacitor (capacitor)
D1 to D6 Diode (rectifier element)
J1 to J6, Ju, Jd Connection M1a, M2a, M3a, M4a, M5a, M6a, Mua, Mda Normal time drive circuit M1b, M2b, M3b, M4b, M5b, M6b, Mda, Mdb Discharge time drive circuit Q1 to Q6 , Qu, Qd Switching element Za, Zb, Zc, Zd Insulating element N Base potential

Claims (9)

A capacitor connected to both ends of the output side of the power supply source for smoothing, a plurality of switching elements for converting and outputting the power supplied from the power supply source, and the power provided corresponding to each switching element In a power conversion device comprising: a plurality of normal driving circuits that drive the switching elements corresponding to the conversion; and a normal driving power source that outputs power necessary for the operations of the plurality of normal driving circuits.
One or more discharge driving circuits provided corresponding to each of the one or more switching elements among the plurality of switching elements and driving the corresponding switching elements when discharging the charge accumulated in the capacitor;
A power supply for driving at the time of discharge that is provided separately from the power supply for driving at the time of normal, and outputs power necessary for the operation of the driving circuit at the time of discharge;
A board on which a plurality of connecting portions are provided corresponding to each switching element and arranged to connect to the switching element, and
The one or more discharge driving circuits are arranged in one or more specific areas including a connection part selected from the plurality of connection parts, and the discharge driving power source is arranged in the vicinity of the specific area. The power converter characterized by the above-mentioned. A drive signal generation circuit for generating a drive signal to be transmitted to the plurality of normal-time drive circuits;
The power conversion device according to claim 1, wherein the one or more discharging drive circuits are arranged in a region including a connection portion located in the vicinity of a region in which the drive signal generation circuit is arranged.   The power converter according to claim 1, further comprising a double-sided cooling device that cools from both sides of the switching element. A capacitor connected to both ends of the output side of the power supply source for smoothing, a plurality of switching elements for converting and outputting the power supplied from the power supply source, and the power provided corresponding to each switching element In a power conversion device comprising: a plurality of normal driving circuits that drive the switching elements corresponding to the conversion; and a normal driving power source that outputs power necessary for the operations of the plurality of normal driving circuits.
One or more discharge driving circuits provided corresponding to each of the one or more switching elements among the plurality of switching elements and driving the corresponding switching elements when discharging the charge accumulated in the capacitor;
A power supply for driving at the time of discharge that is provided separately from the power supply for driving at the time of normal, and outputs power necessary for the operation of the driving circuit at the time of discharge;
The plurality of switching elements are divided into an upper arm region and a lower arm region, and a different potential region different from the potential of these regions is interposed between the upper arm region and the lower arm region. A substrate to be arranged, and
The one or more discharging drive circuits are located in or near the end region in both the upper arm region and the lower arm region, which are arranged in a row. .   The region where the one or more discharging driving circuits are arranged includes a connection portion connected to a switching element that is driven when discharging the electric charge accumulated in the capacitor among the plurality of switching elements. Item 5. The power conversion device according to any one of Items 1 to 4. The substrate includes a predetermined voltage region to which a predetermined voltage is applied, and a potential difference detection circuit that detects a potential difference between a base potential and the predetermined voltage,
2. The discharge driving power source is connected to the potential difference detection circuit, receives electric power supplied from the potential difference detection circuit, and outputs electric power necessary for the operation of the discharge driving circuit. To 5. The power conversion device according to any one of claims 5 to 5.   The power converter according to claim 6, wherein the one or more discharge driving circuits are located in a vicinity of a region where the potential difference detection circuit is disposed. The plurality of switching elements are arranged separately in an upper arm region and a lower arm region,
The power supply for driving at the time of discharging is connected to a switching element in the upper arm region and operates by receiving electric power supplied to the switching element. Power converter. The plurality of switching elements are arranged separately in an upper arm region and a lower arm region,
2. The one or more discharging drive circuits are connected to a corresponding switching element in the lower arm region, and are based on a base potential of the corresponding switching element in the lower arm region. 5. The power conversion device according to claim 5.

Images