Power supply device for gate driving

Abstract

A power supply device for gate drive supplies a direct-current power source to a plurality of gate drive circuits provided for a power conversion device. The power conversion device includes a step-up / down converter and one or more ac-dc conversion circuits. The step-up / down converter includes a step-up / down upper arm switching element and a step-up / down lower arm switching element. The ac-dc conversion circuit includes an ac-dc upper arm switching element and an ac-dc lower arm switching element. The power supply device for gate drive includes a power supply unit that supplies a direct-current power source to at least two of the step-up / down upper arm switching element, the step-up / down lower arm switching element, the ac-dc upper arm switching element, and the ac-dc lower arm switching element in common.

Description

Technical Field

[0001] This invention relates to a power supply device for gate driving.

[0002] This application asserts priority based on Japanese Patent Application No. 2019-173306, filed in Japan on September 24, 2019, the contents of which are incorporated herein by reference. Background Technology

[0003] Patent Document 1 discloses a motor control device comprising: a gate drive circuit that drives switching elements of each arm of an inverter circuit; and a power supply circuit that independently supplies power to each gate drive circuit of the upper arm (upper-side gate drive circuit) and each gate drive circuit of the lower arm (lower-side gate drive circuit). The power supply circuit in this motor control device includes a transformer corresponding to the number of gate drive circuits (6), and rectifies the output of each transformer, thereby independently supplying power to each gate drive circuit.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2009-130967 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, the aforementioned power supply circuit is a gate drive power supply device with a power generation circuit consisting of a transformer and a rectifier circuit for each gate drive circuit, which has the problem of a relatively large mounting area (mounting volume). For example, if multiple gate drive circuits that drive multiple inverter circuits are to be mounted on a single printed circuit board, the number of power generation circuits required corresponds to the number obtained by multiplying the number of phases of the inverter circuits by the number of inverter circuits, thus resulting in a larger printed circuit board and increased costs.

[0009] The present invention was made in view of the above circumstances, and its object is to provide a power supply device for gate driving with a smaller mounting area (mounting volume) than in the past.

[0010] Methods for solving problems

[0011] To achieve the above objectives, one aspect of the present invention relates to a gate drive power supply device that supplies DC power to the gate drive circuit of a power conversion device consisting of a buck-boost converter having a buck-boost upper arm switching element and a buck-boost lower arm switching element, and one or more AC-DC conversion circuits having an AC-DC upper arm switching element and an AC-DC lower arm switching element. The gate drive power supply device includes a power supply unit that supplies DC power to at least two of the buck-boost upper arm switching element, the buck-boost lower arm switching element, the AC-DC upper arm switching element, and the AC-DC lower arm switching element.

[0012] Alternatively, in a power supply device for gate driving according to one aspect of the present invention, the power supply unit may supply the DC power to the buck-boost lower arm switching element and one or more of the AC-DC lower arm switching elements in a common manner.

[0013] Alternatively, in a gate drive power supply device according to one aspect of the present invention, the AC-DC conversion circuit may include: a power operation inverter that converts DC power input from the buck-boost converter into AC power and supplies it to a load; and a regenerative converter that converts the output of an AC generator, i.e., AC power, into DC power and outputs it to the buck-boost converter.

[0014] Alternatively, in one embodiment of the present invention, a power supply device for gate driving may include a second power supply unit that provides DC power to both the buck-boost upper arm switching element and the AC-DC upper arm switching element.

[0015] Alternatively, in a gate driving power supply device according to one aspect of the present invention, a control circuit that controls the power supply unit, the second power supply unit, and the gate driving circuit may be mounted on a single printed circuit board such that the control circuit is clamped by the power supply unit and the second power supply unit.

[0016] Alternatively, in one aspect of the power supply device for gate driving according to the present invention, the printed circuit board is a multilayer printed circuit board with patterned wiring formed on at least two sides. The gate driving circuit for the lower arm of the buck-boost switch element and the gate driving circuit for the lower arm of the cross-sectional area switch element are mounted with the power supply unit in a positional relationship with the back surface. The gate driving circuit for the upper arm of the buck-boost switch element and the gate driving circuit for the upper arm of the cross-sectional area switch element are mounted with the second power supply unit in a positional relationship with the back surface.

[0017] Alternatively, in a gate drive power supply device according to one aspect of the present invention, the AC-DC conversion circuit may include a three-phase AC-DC upper arm switching element and an AC-DC lower arm switching element.

[0018] Invention Effects

[0019] According to one aspect of the present invention, a power supply device for gate driving with a smaller mounting area (mounting volume) than in the past can be provided. Attached Figure Description

[0020] Figure 1 This is a circuit diagram showing the structure of a power supply device for gate driving according to the first embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram showing the substrate layout in the first embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram showing the structure of the gate driving power supply device according to the first embodiment of the present invention, and a circuit diagram of the power conversion circuit in the first embodiment.

[0023] Figure 4 This is a schematic diagram showing the structure of a power supply device for gate driving according to the second embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram showing the structure of a power supply device for gate driving according to the third embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram showing the structure of a power supply device for gate driving according to the fourth embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram showing the structure of a power supply device for gate driving according to the fifth embodiment of the present invention. Detailed Implementation

[0027] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0028] [First Embodiment]

[0029] First, the first embodiment of the present invention will be described. For example... Figure 1 As shown, the gate driving power supply device according to the first embodiment includes nine power supply units, namely the first to ninth power supply units P1 to P9, and a single power drive circuit D. The nine power supply units, namely the first to ninth power supply units P1 to P9, are... Figure 2 The 14 gate drive circuits shown, namely the 1st to 14th gate drive circuits G1 to G14, are DC power supply circuits that supply DC power. Figure 1 As shown, the input side is connected in parallel between the output terminal of the power drive circuit D and the circuit power supply Vcc (DC power supply).

[0030] exist Figure 1 For simplicity, only the detailed structure of the first power supply unit P1, which supplies DC power to the first gate drive circuit G1, is shown in the diagram. However, all nine power supply units, namely power supply units P1 to P9, have the same structure. Additionally, as... Figure 2 As shown, the first power supply unit P1 supplies DC power to the first gate drive circuit G1.

[0031] On the other hand, such as Figure 2 As shown, the second power supply unit P2 supplies DC power to the four gate drive circuits. Specifically, the second power supply unit P2 supplies DC power to the second gate drive circuit G2, the fourth gate drive circuit G4, the sixth gate drive circuit G6, and the eighth gate drive circuit G8. Furthermore, the third power supply unit P3 supplies DC power to the third gate drive circuit G3. The fourth power supply unit P4 supplies DC power to the fifth gate drive circuit G5. The fifth power supply unit P5 supplies DC power to the seventh gate drive circuit G7.

[0032] Furthermore, the 6th power supply unit P6 supplies DC power to the 9th gate drive circuit G9. The 7th power supply unit P7 supplies DC power to the three gate drive circuits. That is, the 7th power supply unit P7 supplies DC power to the 10th gate drive circuit G10, the 12th gate drive circuit G12, and the 14th gate drive circuit G14. Subsequently, the 8th power supply unit P8 supplies DC power to the 11th gate drive circuit G11. The 9th power supply unit P9 supplies DC power to the 13th gate drive circuit G13.

[0033] That is, a total of nine power supply units, namely power supply units P1 to P9, namely power supply units P1, P3, P4, P5, P6, P8, and P9, supply DC power to a single gate drive circuit. However, power supply unit P2 supplies DC power to four gate drive circuits, and power supply unit P7 supplies DC power to three gate drive circuits. These power supply units P2 and P7 are equivalent to the power supply units of the present invention.

[0034] Here, a total of 14 gate drive circuits G1~G14 are used for driving. Figure 3The drive circuit of the power conversion device is shown. This power conversion device, for example, is a PCU (power control unit) mounted in a vehicle, and consists of a buck-boost converter E1, a generator converter E2 (regenerative converter), and a driving inverter E3 (power operation inverter). Furthermore, the generator converter E2 and the driving inverter E3 correspond to the AC-DC conversion circuit of this invention.

[0035] Regarding this power conversion device, the first gate drive circuit G1 and the second gate drive circuit G2 described above drive the buck-boost converter E1. The third to eighth gate drive circuits G3 to G8 drive the generator converter E2. In addition, the ninth to fourteenth gate drive circuits G9 to G14 drive the driving inverter E3.

[0036] The buck-boost converter E1 is a bidirectional buck-boost circuit, such as... Figure 3 As shown, it includes a first smoothing capacitor 1, a coil 2, an upper arm switching element 3 (a step-up upper arm switching element), and a lower arm switching element 4 (a step-up lower arm switching element).

[0037] The buck-boost converter E1 has the following functions: a boost function, which boosts the first DC power input from an external source to the input / output terminals a1 and a2, and outputs it as the second DC power to the driving inverter E3; and a buck function, which steps down the second DC power input from the generator converter E2 and / or the driving inverter E3, and outputs it as the first DC power to the input / output terminals a1 and a2. Furthermore, the aforementioned upper buck-boost switch element 3 and lower buck-boost switch element 4 are, for example, IGBTs (Insulated Gate Bipolar Transistors).

[0038] In this buck-boost converter E1, the upper buck-boost switching element 3 is driven by a first gate drive circuit G1 that receives power from the first power supply unit P1. Furthermore, the lower buck-boost switching element 4 is driven by a second gate drive circuit G2 that receives power from the second power supply unit P2.

[0039] The generator converter E2 is a three-phase converter that uses the generator motor M1 as a power supply source. It has three upper arm switching elements 5, 7, and 9 (AC / DC upper arm switching elements) and three lower arm switching elements 6, 8, and 10 (AC / DC lower arm switching elements). The generator converter E2 converts the AC power input from the generator motor M1 into DC power and outputs it to the buck-boost converter E1. Furthermore, the aforementioned generator motor M1 functions as an AC generator.

[0040] In this power generation converter E2, the AC / DC upper arm switching element 5 and the AC / DC lower arm switching element 6 constitute the first switching leg. Furthermore, the AC / DC upper arm switching element 7 and the AC / DC lower arm switching element 8 constitute the second switching leg. Finally, the AC / DC upper arm switching element 9 and the AC / DC lower arm switching element 10 constitute the third switching leg.

[0041] In this power generation converter E2, the AC / DC upper arm switching element 5 is driven by the third gate drive circuit G3, which receives power from the third power supply unit P3. The AC / DC lower arm switching element 6 is driven by the fourth gate drive circuit G4, which receives power from the second power supply unit P2.

[0042] Furthermore, the switching element 7 for the AC upper arm is driven by the fifth gate drive circuit G5, which receives power from the fourth power supply unit P4. The switching element 8 for the AC lower arm is driven by the sixth gate drive circuit G6, which receives power from the second power supply unit P2.

[0043] Furthermore, the AC-DC upper arm switching element 9 is driven by the 7th gate drive circuit G7, which receives power from the 5th power supply unit P5. The AC-DC lower arm switching element 10 is driven by the 8th gate drive circuit G8, which receives power from the 2nd power supply unit P2. In addition, the aforementioned AC-DC upper arm switching elements 5, 7, 9 and AC-DC lower arm switching elements 6, 8, 10 are, for example, IGBTs.

[0044] The driving inverter E3 is a three-phase inverter that drives the driving motor M2 as a load. It has three upper arm switching elements 11, 13, and 15 (AC / DC upper arm switching elements) and three lower arm switching elements 12, 14, and 16 (AC / DC lower arm switching elements). The generator converter E2 converts the second DC power input from the buck-boost converter E1 into a second AC power and outputs it to the driving motor M2. The driving motor M2 is the motor that drives the wheels.

[0045] In this driving inverter E3, the AC / DC upper arm switching element 11 and the AC / DC lower arm switching element 12 constitute the fourth switching arm. Furthermore, the AC / DC upper arm switching element 13 and the AC / DC lower arm switching element 14 constitute the fifth switching arm. Finally, the AC / DC upper arm switching element 15 and the AC / DC lower arm switching element 16 constitute the sixth switching arm.

[0046] In this driving inverter E3, the AC / DC upper arm switching element 11 is driven by the 9th gate drive circuit G9, which receives power from the 6th power supply unit P6. The AC / DC lower arm switching element 12 is driven by the 10th gate drive circuit G10, which receives power from the 7th power supply unit P7.

[0047] Furthermore, the switching element 13 for the AC upper arm is driven by the 11th gate drive circuit G11, which receives power from the 8th power supply unit P8. The switching element 14 for the AC lower arm is driven by the 12th gate drive circuit G12, which receives power from the 7th power supply unit P7.

[0048] Furthermore, the upper arm switching element 15 is driven by the 13th gate drive circuit G13, which receives power from the 9th power supply unit P9. The lower arm switching element 16 is driven by the 14th gate drive circuit G14, which receives power from the 7th power supply unit P7. Additionally, the aforementioned upper arm switching elements 11, 13, and 15, and the lower arm switching elements 12, 14, and 16 are, for example, IGBTs.

[0049] In addition, such a power conversion device includes a second smoothing capacitor 17 for outputting a second DC power. That is, one end of the second smoothing capacitor 17 is connected to one output terminal of the buck-boost converter E1, and the other end is connected to another output terminal of the buck-boost converter E1, so as to smooth the output of the buck-boost converter E1.

[0050] The power drive circuit D includes a pulse generation circuit S and a drive transistor Tr. The pulse generation circuit S generates a pulse signal with a specific period and a specific duty cycle and outputs it to the base terminal of the drive transistor Tr. The base terminal of the drive transistor Tr is connected to the output terminal of the pulse generation circuit S, the emitter terminal is grounded, and the collector terminal is connected to one end of the primary winding of the aforementioned transformer T1. This power drive circuit D applies pulsed power (pulse electricity) to the input side of the first to ninth power supply units P1 to P9, that is, to the primary windings of the transformers of the first to ninth power supply units P1 to P9 that are connected in series.

[0051] The first power supply unit P1 transforms the pulsed power applied to the primary winding of transformer T1 by such power drive circuit D using transformer T1 and rectifies it using rectifier circuit, thereby generating DC power of a specific voltage, which is output from the two ends of rectifier capacitor C1 to gate drive circuit G1.

[0052] In addition, the other power supply units P2 to P9, like the first power supply unit P1, transform the pulse power applied to the primary winding of the transformer T1 by the power supply drive circuit D using a transformer and rectify it using a rectifier circuit, thereby generating DC power of a specific voltage, and outputting it from the two ends of the rectifier capacitor to the second to 14th gate drive circuits G2 to G14.

[0053] Here, the aforementioned 14 gate drive circuits G1~G14 are... Figure 2The control circuit CT shown provides unified control. The power supply relationship between the 1st to 9th power supply units P1 to P9 and the 1st to 14th gate drive circuits G1 to G14 is as described above. Figure 2 As shown, the first to ninth power supply units P1 to P9, the first to 14th gate drive circuits G1 to G14, and the control circuit CT are mounted on a single printed circuit board K.

[0054] That is, the configuration (layout) is as follows: the control circuit CT is clamped by the power supply units P1, P3, P4, P5, P6, P8, P9 that supply DC power to the gate drive circuits G1, G3, G5, G7, G9, G11, G13 of the upper arm drive switching elements 3, 5, 7, 9, 11, 13, 15; the second power supply unit P2 that supplies DC power to the gate drive circuits G2, G4, G6, G8 of the lower arm drive switching elements 4, 6, 8, 10; and the seventh power supply unit P7 that supplies DC power to the gate drive circuits G12, G14 of the lower arm drive switching elements 12, 14, 16.

[0055] More specifically, for the rectangular printed circuit board K, the control circuit CT is arranged in a long strip shape along the long side in the central part. A connector CN for receiving and transmitting power and signals from the outside is arranged at one end of the control circuit CT. Furthermore, a power supply circuit Pc for generating power for the control circuit CT is installed near the connector CN in the control circuit CT.

[0056] The first, third, fourth, fifth, sixth, eighth, and ninth power supply units P1, P3, P4, P5, P6, P8, and P9 are arranged in a row along the long side of the printed circuit board K on one side of the control circuit CT. Furthermore, the second power supply unit P2 and the seventh power supply unit P7 are arranged in a row along the long side of the printed circuit board K on the other side of the control circuit CT. That is, the first, third, fourth, and fifth power supply units P1, P3, P4, and P5 are arranged facing the second power supply unit P2 along the short side of the printed circuit board K, with the control circuit CT sandwiched between them. Additionally, the sixth, eighth, and ninth power supply units P6, P8, and P9 are arranged facing the seventh power supply unit P7 along the short side of the printed circuit board K, with the control circuit CT sandwiched between them.

[0057] Furthermore, the aforementioned printed circuit board K is a multilayer printed circuit board with patterned wiring formed on at least two sides. Gate drive circuits G1 to G14 (numbers 1 to 14) are mounted on one surface of the printed circuit board K. Power supply units P1 to P9 (numbers 1 to 9) are mounted on the other surface of the printed circuit board K. That is, the gate drive circuits G1 to G14 (numbers 1 to 14) and the power supply units P1 to P9 (numbers 1 to 9) supplying DC power to the gate drive circuits G1 to G14 (numbers 1 to 14) are mounted in a position relative to the back surface of the printed circuit board K.

[0058] More specifically, such as Figure 2 As shown, the first gate drive circuit G1 and the first power supply unit P1 are mounted in a positional relationship on the back surface. The second, fourth, sixth, and eighth gate drive circuits G2, G4, G6, and G8 are mounted in a positional relationship on the back surface with the second power supply unit P2. Furthermore, the third gate drive circuit G3 and the third power supply unit P3 are mounted in a positional relationship on the back surface. The fifth gate drive circuit G5 and the fourth power supply unit P4 are mounted in a positional relationship on the back surface. The seventh gate drive circuit G7 and the fifth power supply unit P5 are mounted in a positional relationship on the back surface.

[0059] Furthermore, the 9th gate drive circuit G9 and the 6th power supply unit P6 are mounted in a position relative to the back surface. The 10th, 12th, and 14th gate drive circuits G10, G12, and G14 are mounted in a position relative to the back surface, along with the 7th power supply unit P7. Furthermore, the 11th gate drive circuit G11 and the 8th power supply unit P8 are mounted in a position relative to the back surface. The 13th gate drive circuit G13 and the 9th power supply unit P9 are mounted in a position relative to the back surface.

[0060] That is, in the above-mentioned gate drive circuits G1 to G14, the first gate drive circuit G1 corresponds to the gate drive circuit for the upper arm of the buck-boost converter of the present invention, and the second gate drive circuit G2 corresponds to the gate drive circuit for the lower arm of the buck-boost converter of the present invention. Furthermore, the third, fifth, seventh, ninth, eleventh, and thirteenth gate drive circuits G3, G5, G7, G9, G11, and G13 correspond to the gate drive circuit for the upper arm of the AC / DC converter of the present invention. The fourth, sixth, eighth, tenth, twelfth, and thirteenth gate drive circuits G4, G6, G8, G10, G12, and G14 correspond to the gate drive circuit for the lower arm of the AC / DC converter of the present invention.

[0061] Next, refer to Figure 1 The detailed elements of power supply units P1 to P9 (number 1 to 9) will be explained. Since all power supply units P1 to P9 have the same structure, the detailed structure of power supply unit P1 (number 1) will be used as an example for explanation below.

[0062] The first power supply unit P1 includes a transformer T1, a pair of diodes D11 and D12, and a rectifier capacitor C1. Transformer T1 is a transformer with a primary winding and a secondary winding. One end of the primary winding of transformer T1 is connected to the output terminal of the power drive circuit D, and the other end of the primary winding is connected to one input terminal of the second power supply unit P2, that is, one end of the primary winding of the transformer (not shown) of the second power supply unit P2.

[0063] Furthermore, one end of the secondary winding of transformer T1 is connected to the anode terminal of diode D11, and the other end of the secondary winding is connected to the anode terminal of diode D12. Moreover, the center tap of the secondary winding of transformer T1 is connected to the other end of rectifier capacitor C1.

[0064] In a pair of diodes D11 and D12, the anode terminal of diode D11 is connected to one end of the secondary winding of transformer T1, and its cathode terminal is connected to the cathode terminal of the other diode D12 and one end of rectifier capacitor C1. The anode terminal of the other diode D12 is connected to the other end of the secondary winding of transformer T1, and its cathode terminal is connected to the cathode terminal of diode D11 and one end of rectifier capacitor C1.

[0065] One end of the rectifier capacitor C1 is connected to the cathode terminals of a pair of diodes D11 and D12, and the other end is connected to the center tap of the secondary winding in transformer T1. This pair of diodes D11 and D12 and the rectifier capacitor C1 constitute a rectifier circuit that rectifies and converts the pulsed power (pulse voltage) input from the secondary winding of transformer T1 into DC power (DC voltage).

[0066] In this gate drive power supply device, such as Figure 2 as well as Figure 3 As shown, DC power is supplied from the second power supply unit P2 to the second gate drive circuit G2 for driving the step-up / step-down lower arm switching element 4 and the fourth, sixth, and eighth gate drive circuits G4, G6, and G8 for driving the three AC / DC lower arm switching elements 6, 8, and 10 to the common ground.

[0067] Therefore, according to the first embodiment, compared with the case where the power supply unit is independently provided in the second gate drive circuit G that drives the buck-boost converter E1 and the fourth, sixth, and eighth gate drive circuits G4, G6, and G8 that drive the power generation converter E2, the installation area (installation volume) can be reduced compared to the past.

[0068] Furthermore, in this gate drive power supply device, the AC / DC lower arm switching elements 6, 8, and 10 of the power generation converter E2 are grouped with the buck-boost lower arm switching element 4 of the buck-boost converter E1, and DC power is supplied from the second power supply unit P2. However, the AC / DC lower arm switching elements 12, 14, and 16 of the driving inverter E3 are not grouped with the buck-boost lower arm switching element 4 of the buck-boost converter E1.

[0069] The rationale behind this arrangement is that the driving inverter E3 is the power conversion circuit that drives the driving motor M2, while the generator inverter E2 performs DC-DC conversion on the output (AC power) of the generator motor M1. Furthermore, when considered as a PCU mounted in the vehicle, the reliability of the driving inverter E3 is prioritized compared to the generator inverter E2. According to this first embodiment, even if an anomaly occurs in the gate drive power supply, the vehicle can still operate stably.

[0070] Furthermore, according to the first embodiment, DC power is supplied from the 7th power supply unit P7 to the common ground of the 10th, 12th, and 14th gate drive circuits G10, G12, and G14 that drive the three AC / DC lower arm switching elements 12, 14, and 16. Therefore, compared to the case where the power supply unit is set independently in the 10th, 12th, and 14th gate drive circuits G10, G12, and G14 that drive the driving inverter E3, the installation area (installation volume) can be reduced compared to the past.

[0071] [Second Implementation]

[0072] Next, the second embodiment of the present invention will be described. For example... Figure 4 As shown, the circuit structure of the power conversion device for the gate drive power supply according to the second embodiment is the same as that of the first embodiment. Figure 4 In this drawing, the same reference numerals are used to denote the same constituent elements as in the first embodiment.

[0073] The gate drive power supply device includes a total of 14 gate drive circuits, namely the 1st to 14th gate drive circuits G1 to G14. However, the structure of the power supply unit that supplies DC power to the 1st to 14th gate drive circuits G1 to G14 is different from that in the first embodiment. That is, in addition to the 1st, 3rd to 6th, 8th and 9th power supply units P1, P3 to P6, P8 and P9, the gate drive power supply device also includes a 10th power supply unit P10.

[0074] The 10th power supply unit P10 supplies DC power to a total of seven gate drive circuits. That is, in addition to the 2nd, 4th, 6th, and 8th gate drive circuits G2, G4, G6, and G8, the 10th power supply unit P10 also supplies DC power to the 10th, 12th, and 14th gate drive circuits G10, G12, and G14. That is, in the first embodiment, DC power is supplied to a total of seven gate drive circuits, namely the second and seventh power supply units P2 and P7, namely the second, fourth, sixth, eighth, tenth, twelfth and twelfth gate drive circuits G2, G4, G6, G8, G10, G12 and G14, by two power supply units, namely the second and seventh power supply units P2 and P7. However, in the second embodiment, DC power is supplied to a total of seven gate drive circuits, namely the second, fourth, sixth, eighth, tenth and twelfth gate drive circuits G2, G4, G6, G8, G10, G12 and G14, by a single tenth power supply unit P10.

[0075] According to this second embodiment, the number of power supply units can be reduced compared to the first embodiment, and therefore the installation area (installation volume) can be reduced compared to the first embodiment.

[0076] [Third Implementation]

[0077] Next, the third embodiment of the present invention will be described. For example... Figure 5 As shown, the circuit structure of the power conversion device for the gate drive power supply according to the third embodiment is the same as that of the first embodiment. Figure 5 In this drawing, the same reference numerals are used to denote the same constituent elements as in the first embodiment.

[0078] The gate driving power supply device includes a total of 14 gate driving circuits, namely the 1st to 14th gate driving circuits G1 to G14. However, the structure of the power supply unit that supplies DC power to the 1st to 14th gate driving circuits G1 to G14 is different from that in the first and second embodiments. That is, in addition to the 1st, 2nd, and 7th power supply units P1, P2, and P7, the gate driving power supply device also includes an 11th power supply unit P11 and a 12th power supply unit P12.

[0079] The 11th power supply unit P11 supplies DC power to the three gate drive circuits, namely the 3rd, 5th, and 7th gate drive circuits G3, G5, and G7 that drive the generator converter E2. On the other hand, the 12th power supply unit P12 supplies DC power to the three gate drive circuits, namely the 3rd, 5th, and 7th gate drive circuits G3, G5, and G7 that drive the driving inverter E3.

[0080] Such 11th power supply unit P11 and 12th power supply unit P12 are equivalent to the 2nd power supply unit in this invention.

[0081] That is, in this third embodiment, DC power is supplied from the 11th power supply unit P11 to the 3rd, 5th, and 7th gate drive circuits G3, G5, and G7 of the three AC / DC upper arm switching elements 5, 7, and 9 constituting the generator converter E2. Furthermore, in this third embodiment, DC power is supplied from the 12th power supply unit P12 to the 9th, 11th, and 13th gate drive circuits G9, G11, and G13 of the three AC / DC upper arm switching elements 11, 13, and 15 constituting the driving inverter E3.

[0082] According to this third embodiment, the number of power supply units can be reduced compared to the first embodiment, and therefore the installation area (installation volume) can be reduced compared to the first embodiment.

[0083] [Fourth Implementation]

[0084] Next, the fourth embodiment of the present invention will be described. For example... Figure 6 As shown, the circuit structure of the power conversion device for the gate drive power supply according to the fourth embodiment is the same as that of the first embodiment. Figure 6 In this drawing, the same reference numerals are used to denote the same constituent elements as in the first embodiment.

[0085] The gate drive power supply device includes a total of 14 gate drive circuits, namely the 1st to 14th gate drive circuits G1 to G14. However, the structure of the power supply unit that supplies DC power to the 1st to 14th gate drive circuits G1 to G14 is different from that in the 1st to 3rd embodiments. That is, in addition to the 2nd, 6th, 7th, 8th, and 9th power supply units P2, P6, P7, P8, and P9, the gate drive power supply device also includes a 13th power supply unit P13.

[0086] The 13th power supply unit P13 supplies DC power to a total of four gate drive circuits, namely the first gate drive circuit G1 that drives the buck-boost converter E1 and the third, fifth, and seventh gate drive circuits G3, G5, and G7 that drive the power generation converter E2.

[0087] That is, in this fourth embodiment, DC power is supplied from the 13th power supply unit P13 to the first gate drive circuit G1 of the buck-boost upper arm switching element 3 constituting the buck-boost converter E1 and the third, fifth, and seventh gate drive circuits G3, G5, and G7 of the three AC-DC upper arm switching elements 5, 7, and 9 constituting the power generation converter E2.

[0088] According to this fourth embodiment, the number of power supply units can be reduced compared to the first embodiment, and therefore the installation area (installation volume) can be reduced compared to the first embodiment.

[0089] [Fifth Implementation]

[0090] Next, the fifth embodiment of the present invention will be described. For example... Figure 7 As shown, the circuit structure of the power conversion device for the gate drive power supply according to the fifth embodiment is the same as that of the first embodiment. Figure 7 In this drawing, the same reference numerals are used to denote the same constituent elements as in the first embodiment.

[0091] The gate driving power supply device includes a total of 14 gate driving circuits, namely the first to the 14th gate driving circuits G1 to G14. However, the structure of the power supply unit that supplies DC power to the first to the 14th gate driving circuits G1 to G14 is different from that in the first to the fourth embodiments. That is, the gate driving power supply device includes a 14th power supply unit P14 and a 15th power supply unit P15.

[0092] The 14th power supply unit P14 supplies DC power to a total of seven gate drive circuits, namely the first gate drive circuit G1 that drives the buck-boost converter E1, the third, fifth, and seventh gate drive circuits G3, G5, and G7 that drive the generator converter E2, and the ninth, eleventh, and thirteenth gate drive circuits G9, G11, and G13 that drive the driving inverter E3.

[0093] On the other hand, the 15th power supply unit P15 supplies DC power to a total of seven gate drive circuits. That is, the 15th power supply unit P15 supplies DC power to the second gate drive circuit G2 that drives the buck-boost converter E1, the fourth, sixth, and eighth gate drive circuits G4, G6, and G8 that drive the generator converter E2, and the tenth, twelfth, and fourteenth gate drive circuits G10, G12, and G14 that drive the driving inverter E3.

[0094] That is, in this fifth embodiment, DC power is supplied from the 14th power supply unit P14 to the first gate drive circuit G1 for the lifting arm switching element 3 constituting the buck-boost converter E1, the third, fifth, and seventh gate drive circuits G3, G5, and G7 for the three AC / DC arm switching elements 5, 7, and 9 constituting the generator converter E2, and the ninth, eleventh, and thirteenth gate drive circuits G9, G11, and G13 for the three AC / DC arm switching elements 11, 13, and 15 constituting the driving inverter E3.

[0095] Furthermore, in this fifth embodiment, DC power is supplied from the 15th power supply unit P15 to the second gate drive circuit G2 for the lower arm switching element 4 constituting the buck-boost converter E1, the fourth, sixth, and eighth gate drive circuits G4, G6, and G8 for the three AC / DC lower arm switching elements 6, 8, and 10 constituting the generator converter E2, and the tenth, 12th, and 14th gate drive circuits G10, G12, and G14 for the three AC / DC lower arm switching elements 12, 14, and 16 constituting the driving inverter E3.

[0096] According to this fifth embodiment, the number of power supply units can be significantly reduced compared to the first embodiment, and therefore the installation area (installation volume) can be significantly reduced compared to the first embodiment.

[0097] Furthermore, the present invention is not limited to the above-described embodiments; for example, variations such as the following may be considered.

[0098] (1) In the above-described embodiments 1 to 5, five modes of supply and demand relationships for the DC power supply of a total of 14 gate drive circuits, namely the first to the 14th gate drive circuits G1 to G14, were described, but the present invention is not limited thereto.

[0099] The main purpose of this invention is to reduce the number of power supply units by supplying DC power to at least two of the switch elements for the upper arm of the buck-boosting circuit, the lower arm of the buck-boosting circuit, the upper arm of the AC-DC circuit, and the lower arm of the AC-DC circuit, thereby reducing the installation area (installation volume) compared to the past. Therefore, other methods are also possible as long as the power supply unit provides DC power to multiple gate drive circuits.

[0100] (2) In the above embodiments 1 to 5, a power conversion device having a buck-boost converter E1, a power generation converter E2, and a driving inverter E3 has been described, but the structure of the power conversion device is not limited thereto. For example, the present invention can also be applied to a power conversion device having only a buck-boost converter E1 and a driving inverter E3, or / and a power conversion device having only a power generation converter E2 and a driving inverter E3.

[0101] Furthermore, if the vehicle has a driving assistance motor instead of the generator motor M1, a driving assistance converter can also be installed instead of the generator converter E2. Moreover, the number of power conversion circuits constituting the power conversion device is not limited to the three or two mentioned above, but can be four or more.

[0102] (3) In the above embodiments 1 to 5, the following is used Figure 1The detailed structure of the power supply device for gate driving has been described, but the present invention is not limited thereto. The power supply device for gate driving according to the present invention may also have other detailed structures.

[0103] For example, although the aforementioned 15 power supply units, namely power supply units 1 to 15 P1 to P15, use a forward converter circuit, they could also use a flyback converter. Furthermore, power supply units 1 to 15 P1 to P15 do not necessarily need to use the same circuit configuration; instead, different circuit configurations could be used for each power supply unit. Moreover, although the aforementioned nine power supply units, namely power supply units 1 to 9 P1 to P9, are driven by a single power drive circuit D, they could instead have their own independent power drive circuits for each power supply unit.

[0104] Industrial availability

[0105] This invention relates to a power supply device for gate driving, which can reduce the mounting area (mounting volume) compared to the past.

[0106] Figure Labels

[0107] E1: Buck-boost converter;

[0108] E2: Converter for power generation (converter for regeneration);

[0109] E3: Inverter for driving (inverter for power operation);

[0110] G1: First gate drive circuit (gate drive circuit for buck-boost upper arm).

[0111] G2: Second gate drive circuit (gate drive circuit for buck-boost lower arm).

[0112] G3: Third gate drive circuit (gate drive circuit for AC-DC conversion upper arm).

[0113] G4: Fourth gate drive circuit (gate drive circuit for the lower arm of AC-DC conversion).

[0114] G5: Fifth gate drive circuit (gate drive circuit for AC-DC conversion upper arm).

[0115] G6: 6th gate drive circuit (gate drive circuit for the lower arm of AC-DC conversion).

[0116] G7: 7th gate drive circuit (gate drive circuit for AC-DC conversion upper arm).

[0117] G8: 8th gate drive circuit (gate drive circuit for the lower arm of AC-DC conversion).

[0118] G9: 9th gate drive circuit (gate drive circuit for AC-DC conversion upper arm).

[0119] G10: 10th gate drive circuit (gate drive circuit for the lower arm of AC-DC conversion).

[0120] G11: 11th gate drive circuit (gate drive circuit for AC-DC conversion upper arm).

[0121] G12: 12th gate drive circuit (gate drive circuit for the lower arm of AC-DC conversion).

[0122] G13: 13th gate drive circuit (gate drive circuit for AC-DC conversion upper arm).

[0123] G14: 14th gate drive circuit (gate drive circuit for the lower arm of AC-DC conversion).

[0124] K: Printed substrate;

[0125] M1: Generator motor;

[0126] M2: Motor for driving;

[0127] P1: First power supply unit;

[0128] P2: Second power supply unit;

[0129] P3: Third power supply unit;

[0130] P4: 4th power supply unit;

[0131] P5: Fifth power supply unit;

[0132] P6: Sixth power supply unit;

[0133] P7: 7th power supply unit;

[0134] P8: 8th power supply unit;

[0135] P9: Ninth power supply unit;

[0136] P10: 10th power supply unit;

[0137] P11: 11th power supply unit;

[0138] P12: 12th power supply unit;

[0139] P13: 13th power supply unit;

[0140] P14: 14th power supply unit;

[0141] P15: 15th power supply unit;

[0142] T1: Transformer;

[0143] D11, D12: Diodes;

[0144] C1: Rectifier capacitor;

[0145] D: Power supply drive circuit;

[0146] S: Pulse generation circuit;

[0147] Tr: driving transistor;

[0148] 1: First smoothing capacitor;

[0149] 2: Coil;

[0150] 3: Switching elements for the upper arm (switching elements for the lifting and lowering upper arm);

[0151] 4: Switching elements for the lower arm (switching elements for the lifting and lowering arm);

[0152] 5, 7, 9: Switching elements for upper arm (AC and DC upper arm switching elements);

[0153] 6, 8, 10: Switching elements for the lower arm (AC and DC lower arm switching elements);

[0154] 11, 13, 15: Switching elements for upper arm (vertical upper arm switching elements);

[0155] 12, 14, 16: Switching elements for lower arms (AC and DC lower arms).

[0156] 17: Second smoothing capacitor.

Claims

1. A power supply device for gate driving, The power conversion device provides DC power to multiple gate drive circuits respectively, and includes: a buck-boost converter with switching elements for the upper and lower buck-boost arms; and one or more AC-DC converter circuits with switching elements for the upper and lower AC-DC arms. The power conversion device is mounted on the vehicle's power control unit and includes a buck-boost converter, a generator converter, and a driving inverter. The power supply device for gate driving includes: The first power supply unit supplies DC power to the upper arm of the buck-boost converter using a switching element. Multiple second power supply units respectively supply DC power to multiple AC / DC upper arm switching elements of the power generation converter; Multiple third power supply units respectively supply DC power to multiple AC / DC upper arm switching elements of the driving inverter; The fourth power supply unit provides a common DC power supply to the switching elements of the buck-boost lower arm of the buck-boost converter and the multiple switching elements of the AC-DC lower arm of the generator converter; and The fifth power supply unit supplies DC power to the common ground of the switching elements of the plurality of AC / DC lower arms of the driving inverter. A control circuit for controlling the first power supply unit, the plurality of second power supply units, the plurality of third power supply units, the fourth power supply unit, the fifth power supply unit, and the plurality of gate drive circuits is mounted on a single printed circuit board such that the control circuit is sandwiched between the first power supply unit, the plurality of second power supply units, the plurality of third power supply units, and the fourth and fifth power supply units. The printed circuit board is a multilayer printed circuit board with patterned wiring formed on at least two sides. The gate drive circuit for the upper arm of the buck-boost converter, which drives the switching element of the upper arm of the buck-boost converter, is mounted with the first power supply unit in a positional relationship to the back surface. The gate drive circuits for the multiple AC / DC upper arms of the converter, which respectively drive the multiple AC / DC upper arm switching elements, and the multiple second power supply units are mounted in a positional relationship on the back surface. The multiple AC / DC upper arm gate drive circuits that drive the multiple AC / DC upper arm switching elements of the driving inverter, and the multiple third power supply units, are mounted in a positional relationship on the back surface. The gate drive circuit for the lower arm of the buck-boost converter that drives the switching element of the lower arm of the buck-boost converter, and the gate drive circuits for the lower arm of the multiple AC / DC converters that drive the switching element of the multiple AC / DC converters, are mounted with the fourth power supply unit in a positional relationship on the back surface. The multiple AC / DC lower arm gate drive circuits that drive the multiple AC / DC lower arm switching elements of the driving inverter and the fifth power supply unit are mounted in a face-to-back position relationship.

2. The power supply device for gate driving according to claim 1, wherein, On one side of the control circuit, the first power supply unit, the plurality of second power supply units, and the plurality of third power supply units are arranged in a row. On the other side of the control circuit, the fourth power supply unit and the fifth power supply unit are configured in a row.

3. The power supply device for gate driving according to claim 1, wherein, The driving inverter is a power operation inverter that converts the DC power input from the buck-boost converter into AC power and supplies it to the load; and The generator converter is a regenerative converter that converts the output of the AC generator, i.e., AC power, into DC power and outputs it to the step-up / step-down converter.

4. The power supply device for gate driving according to claim 1, wherein, The AC-DC conversion circuit includes three-phase switching elements for the upper AC-DC arm and the lower AC-DC arm.

5. A power supply device for gate driving, The power conversion device provides DC power to multiple gate drive circuits respectively, and includes: a buck-boost converter with switching elements for the upper and lower buck-boost arms; and one or more AC-DC converter circuits with switching elements for the upper and lower AC-DC arms. The power conversion device is mounted on the vehicle's power control unit and includes a buck-boost converter, a generator converter, and a driving inverter. The power supply device for gate driving includes: The first power supply unit supplies DC power to the upper arm of the buck-boost converter using a switching element. Multiple second power supply units respectively supply DC power to multiple AC / DC upper arm switching elements of the power generation converter; Multiple third power supply units supply DC power to multiple AC / DC upper arm switching elements of the driving inverter; and The fourth power supply unit provides DC power to the common ground of the buck-boost lower arm switching elements of the buck-boost converter, the plurality of AC-DC lower arm switching elements of the generator converter, and the plurality of AC-DC lower arm switching elements of the driving inverter. A control circuit for controlling the first power supply unit, the plurality of second power supply units, the plurality of third power supply units, the fourth power supply unit, and the plurality of gate drive circuits is mounted on a single printed circuit board such that the control circuit is sandwiched between the first power supply unit, the plurality of second power supply units, the plurality of third power supply units, and the fourth power supply unit. The printed circuit board is a multilayer printed circuit board with patterned wiring formed on at least two sides. The gate drive circuit for the upper arm of the buck-boost converter, which drives the switching element of the upper arm of the buck-boost converter, is mounted with the first power supply unit in a positional relationship to the back surface. The gate drive circuits for the multiple AC / DC upper arms of the converter, which respectively drive the multiple AC / DC upper arm switching elements, and the multiple second power supply units are mounted in a positional relationship on the back surface. The multiple AC / DC upper arm gate drive circuits that drive the multiple AC / DC upper arm switching elements of the driving inverter, and the multiple third power supply units, are mounted in a positional relationship on the back surface. The buck-boost lower arm gate drive circuit for driving the buck-boost lower arm switching element of the buck-boost converter, the multiple AC-DC lower arm gate drive circuits for driving the multiple AC-DC lower arm switching elements of the generator converter, and the multiple AC-DC lower arm gate drive circuits for driving the multiple AC-DC lower arm switching elements of the driving inverter are mounted in a front-side and back-side position relationship with the fourth power supply unit.

6. The power supply device for gate driving according to claim 5, wherein, The driving inverter is a power operation inverter that converts the DC power input from the buck-boost converter into AC power and supplies it to the load; and The generator converter is a regenerative converter that converts the output of the AC generator, i.e., AC power, into DC power and outputs it to the step-up / step-down converter.

7. The power supply device for gate driving according to claim 5, wherein, The AC-DC conversion circuit includes three-phase switching elements for the upper AC-DC arm and the lower AC-DC arm.

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