Drive control device

Abstract

To provide a drive control device capable of preventing reduction in noise resistance while ensuring redundancy in power supply for supplying a plurality of small signal circuits.SOLUTION: The drive control device comprises a power feeding terminal connected to an external power supply to have a redundancy, a plurality of small-signal circuits to which a small signal power supply inputted into the power feeding terminal is fed by a first power supply wiring and a first ground wiring, a drive circuit for generating a predetermined drive signal on the basis of a drive power supply fed by a second power supply wiring and a second ground wiring, and a capacitor connecting the first ground wiring and the second ground wiring.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a drive control device. [Background technology]

[0002] Claim 1 of the following Patent Document 1 describes a control device that includes a circuit board on which electric components constituting a control circuit are mounted, and that receives a signal from a sensor to control a controlled object, wherein the circuit board has a plurality of ground patterns, the plurality of ground patterns including at least one outer edge ground pattern formed along at least a part of the outer periphery of the circuit board, the outer edge ground pattern being configured to surround the other plurality of ground patterns along the at least a part of the outer periphery of the circuit board, and each of the ground patterns other than the outer edge ground pattern is DC-connected to the outer edge ground pattern directly or indirectly via the other ground patterns without a resistor, and is AC-connected to the outer edge ground pattern via at least one capacitor directly or indirectly via the other ground patterns, at a part other than the DC-connected part.

[0003] Furthermore, paragraph 0045 of Patent Document 1 states, "In circuit board 100 of this control device 10, PG172, which is an outer edge ground pattern, is formed along the outer periphery of circuit board 100, and LG170 is formed inside (closer to the center) of circuit board 100 relative to PG172, and PG172 and LG170 are AC-connected by capacitors 200a-d. That is, PG172 and LG170 are DC-connected by GND connection pattern 174 as described above, and are also AC-connected via capacitors 200a-d, and are coupled to each other with low impedance at high frequencies in the vicinity of each connection point." [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5740427 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, as in the background art described above, providing separate power supply patterns and ground patterns (ground patterns) for large signal circuits that handle signals of relatively large amplitude and small signal circuits that handle signals of relatively small amplitude to suppress mutual interference between large signal circuits and small signal circuits is a commonly used technique in circuit implementation. However, in order to ensure power supply redundancy when there are multiple small signal circuits to which power is supplied, it is necessary to provide multiple power supply patterns and ground patterns for each small signal circuit.

[0006] However, when multiple power supply patterns and ground patterns are provided for each small signal circuit, the pattern width of each power supply pattern and ground pattern must be narrowed, that is, the width of the power supply path such as the power supply pattern and the ground pattern must be narrowed, which increases the impedance of the power supply path, resulting in a problem that the small signal circuit becomes more susceptible to the effects of noise.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a drive control device that can suppress a decrease in noise resistance while ensuring redundancy in the power supply of multiple small signal circuits. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention employs, as a first solution related to a drive control device, a power supply terminal connected to an external power supply so as to have redundancy, a plurality of small signal circuits to which a small signal power supply input to the power supply terminal is fed by a first power supply wiring and a first ground wiring, a drive circuit which is fed by a drive power supply by a second power supply wiring and a second ground wiring and generates a predetermined drive signal based on the drive power supply, and a capacitor connected to the first ground wiring and the second ground wiring.

[0009] In the present invention, as a second solution related to the drive control device, the first solution is adopted, in which the capacitor is provided for each of the second ground wirings, which are provided in plurality corresponding to the plurality of small signal circuits.

[0010] The present invention employs, as a third solution related to a drive control device, a solution in which, in the first or second solution, the small signal circuit is a current sensor that detects an output current of a three-phase inverter, and the drive circuit is a gate driver that generates a gate signal that controls the three-phase inverter.

[0011] The present invention employs, as a fourth solution related to a drive control device, a solution in which, in the first or second solution described above, the small signal circuit comprises three driving current sensors each detecting an output current of a three-phase drive inverter that drives a driving motor, three generated current sensors each detecting an input current of a three-phase power generation inverter that converts three-phase AC power input from a generator into DC power, and a reactor current sensor that is provided between a battery and the three-phase drive inverter and the three-phase power generation inverter and detects a reactor current of a step-up / step-down converter that boosts the DC power input from the battery and outputs it to the three-phase drive inverter, while stepping down the DC power input from the three-phase drive inverter and / or the three-phase power generation inverter and outputs it to the battery, and the drive circuit is a gate driver that generates gate signals to control the three-phase power generation inverter, the three-phase power generation inverter, and the step-up / step-down converter.

[0012] The present invention employs a fifth solution related to the drive control device as the fourth solution, in which the power supply terminal is configured to supply power from the small signal power source in a state in which redundancy is provided to at least the three drive current sensors. Effect of the Invention

[0013] According to the present invention, it is possible to provide a drive control device that can suppress a decrease in noise resistance while ensuring redundancy in the power supply to a plurality of small signal circuits. [Brief description of the drawings]

[0014] [Figure 1] 1 is a block diagram showing the overall configuration of a drive control device according to an embodiment of the present invention. [Diagram 2] 2 is a block diagram showing a power supply system of a drive control device according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a circuit diagram showing a power supply circuit of a GD substrate in a drive control device according to an embodiment of the present invention. [Figure 4] 3 is a block diagram showing power supply redundancy in a drive control device according to an embodiment of the present invention; FIG. [Diagram 5] 4 is a block diagram showing a noise passage path in the drive control device according to the embodiment of the present invention. FIG. [Figure 6] FIG. 11 is a block diagram showing a power supply system of a drive control device according to a modified example of the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The drive control device A according to this embodiment is a drive control circuit that controls the drive of a PCU 1 (power control unit) as shown in the figure, and includes an ECU 2 and a gate driver 3.

[0016] The PCU 1 is an assembly of three power conversion circuits, and more specifically, includes a step-up / step-down converter 1a, a driving inverter 1b, and a power generation inverter 1c. The step-up / step-down converter 1a includes a reactor, multiple switching transistors, and a smoothing capacitor, and boosts the DC power supplied to the primary side from a battery pack such as a lithium-ion battery and supplies it to the secondary side driving inverter 1b, while stepping down the DC power (regenerated power and / or generated power) input from the secondary side driving inverter 1b and / or power generation inverter 1c and supplies it to the primary side battery pack.

[0017] The traveling inverter 1b is a three-phase inverter that includes multiple switching transistors and converts the DC power input from the step-up / step-down converter 1a into three-phase AC power and supplies it to the traveling motor as a drive signal, while also converting the regenerative power (three-phase AC power) input from the traveling motor into DC power and supplies it to the secondary side of the step-up / step-down converter 1a. The traveling motor is a three-phase synchronous motor that generates rotational power for traveling and supplies it to the wheels of the electric vehicle.

[0018] The power generation inverter 1c is a three-phase inverter that includes multiple switching transistors and converts the generated power (three-phase AC power) of a generator provided as an accessory to the electric vehicle into direct current power and supplies it to the secondary side of the step-up / step-down converter 1a. In other words, the PCU 1 is a power conversion circuit provided between the travel motor and generator and the assembled battery, and passes power in both directions between the travel motor and generator and the assembled battery.

[0019] Although details will be described later, the step-up / step-down converter 1a, the running inverter 1b, and the power generation inverter 1c are provided with various sensors that detect state quantities that indicate the operating states. For example, the step-up / step-down converter 1a is provided with a primary voltage sensor that detects a primary voltage, a secondary voltage sensor that detects a secondary voltage, and a reactor current sensor that detects a reactor current flowing between the primary side and the secondary side.

[0020] The traveling inverter 1b is provided with three current sensors (U-phase traveling current sensor, V-phase traveling current sensor, and W-phase traveling current sensor) that detect three-phase traveling current, i.e., U-phase traveling current, V-phase traveling current, and W-phase traveling current, that flows between the traveling inverter 1b and the traveling motor. The power generation inverter 1c is provided with three current sensors (U-phase generating current sensor, V-phase generating current sensor, and W-phase generating current sensor) that detect three-phase generating current, i.e., U-phase generating current, V-phase generating current, and W-phase generating current, that flows between the generator.

[0021] The ECU 2 is a control circuit mounted on the ECU board B1 (printed circuit board) and controls the gate driver 3. In other words, the ECU 2 is a feedback control circuit that generates drive control commands to be supplied to the gate driver 3 based on detection signals indicating the operating states of the step-up / step-down converter 1a, the driving inverter 1b, and the power generation inverter 1c.

[0022] The detection signals are output signals from the various sensors described above. That is, the ECU 2 is a software control circuit that generates drive control commands by processing information, using a drive control program stored in advance, on the primary voltage signal, the secondary voltage signal, the reactor current signal, the U-phase running current signal, the V-phase running current signal, the W-phase running current signal, the U-phase generated current signal, the V-phase generated current signal, and the W-phase generated current signal, as well as control commands input from a higher-level control device.

[0023] The gate driver 3 is a drive circuit mounted on the GD board B2 (printed circuit board). The gate driver 3 includes a step-up / step-down drive IC 3a, a traveling drive IC 3b, and a power generation drive IC 3c. The step-up / step-down drive IC 3a generates multiple gate signals that drive the switching transistors of the step-up / step-down converter 1a to turn on / off, and outputs the signals to the step-up / step-down converter 1a.

[0024] The driving IC 3b generates a plurality of gate signals for turning on / off the switching transistors of the driving inverter 1b and outputs them to the driving inverter 1b. The generating driving IC 3c generates a plurality of gate signals for turning on / off the switching transistors of the generating inverter 1c and outputs them to the generating inverter 1c.

[0025] Each gate signal generated by such a gate driver 3 is a PWM signal that sets the duty ratio of the ON / OFF operation of each switching transistor of the step-up / step-down converter 1a, each switching transistor of the driving inverter 1b, and each switching transistor of the power generation inverter 1c based on the drive control command input from the ECU 2.

[0026] Here, the gate driver 3 is a circuit that generates various gate signals that are relatively large amplitude signals, and therefore can be considered a large signal circuit. In contrast, the above-mentioned various sensors are electronic components that supply detection signals that are relatively small amplitude signals to the ECU 2, and therefore can be considered a small signal circuit together with the ECU 2.

[0027] Next, a power supply system of the drive control device A will be described with reference to FIG. 2, in this drive control device A, a small signal power supply SVCC and a drive power supply IGA are supplied from an ECU board B1 to a GD board B2. The small signal power supply SVCC is a power supply for small signal circuits (e.g., for a current sensor), and the drive power supply IGA is a power supply for the drive circuits, that is, the step-up / step-down drive IC3a, the traveling drive IC3b, and the power generation drive IC3c.

[0028] The ECU board B1 and the GD board B2 are housed in a housing (not shown) in a parallel facing state, and are interconnected by a BtoB connector B3. A system power supply 11 and a tracker IC 12 are mounted on the ECU board B1, and the system power supply 11 generates a small signal power supply SVCC, a drive power supply, and an IGA. This system power supply 11 corresponds to the external power supply of the present invention. The tracker IC 12 is a power supply circuit that relays the power supply of the small signal power supply SVCC.

[0029] Among the various sensors of the PCU 1 described above, seven current sensors, namely, the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generated current sensor 7, the V-phase generated current sensor 8, the W-phase generated current sensor 9, and the reactor current sensor 10, are mounted on the GD board B2 as with the gate driver 3, as shown in the figure. These seven current sensors are supplied with power from the small signal power supply SVCC from the ECU board B1 via the BtoB connector B3.

[0030] Here, the GD board B2 is provided with a power supply terminal T that corresponds to the terminal configuration of the BtoB connector B3 and supplies the small signal power supply SVCC to the seven current sensors. The BtoB connector B3 and the power supply terminal T are provided with a power supply terminal and a GND terminal (ground terminal) for each current sensor so that the small signal power supply SVCC is supplied to the seven current sensors with redundancy.

[0031] That is, the BtoB connector B3 and the power supply terminal T of the GD board B2 are connected to the system power supply 11 (external power supply) of the ECU board B1 so as to have redundancy, and each has a total of seven power supply terminals and a total of seven GND terminals (ground terminals). The small signal power supply SVCC is supplied from the ECU board B1 to the GD board B2 via the BtoB connector B3 and the power supply terminal T so as to have redundancy.

[0032] The U-phase running current sensor 4 is a current sensor that detects the U-phase current of the three-phase AC current that is the output current of the running inverter 1b, and outputs a U-phase running current signal (small signal) that indicates the magnitude of the U-phase current. The V-phase running current sensor 5 is a current sensor that detects the V-phase current of the three-phase AC current that is the output current of the running inverter 1b, and outputs a V-phase running current signal (small signal) that indicates the magnitude of the V-phase current.

[0033] The W-phase running current sensor 6 is a current sensor that detects the W-phase current of the three-phase AC current that is the output current of the running inverter 1b, and outputs a W-phase running current signal (small signal) that indicates the magnitude of the W-phase current. The U-phase generated current sensor 7 is a current sensor that detects the U-phase current of the three-phase AC current that is the input current of the power generation inverter 1c, and outputs a U-phase generated current signal (small signal) that indicates the magnitude of the U-phase current.

[0034] The V-phase generated current sensor 8 is a current sensor that detects the V-phase current of the three-phase AC current that is the input current of the power generation inverter 1c, and outputs a V-phase generated current signal (small signal) that indicates the magnitude of the V-phase current. The W-phase generated current sensor 9 is a current sensor that detects the W-phase current of the three-phase AC current that is the input current of the power generation inverter 1c, and outputs a W-phase generated current signal (small signal) that indicates the magnitude of the W-phase current.

[0035] The reactor current sensor 10 is a current sensor that detects a current (reactor current) flowing through a reactor of the step-up / step-down converter 1a, and outputs a reactor current signal (small signal) that indicates the magnitude of the reactor current.

[0036] For the power supply system of the small signal power supply SVCC for these seven current sensors, the gate driver 3 also mounted on the GD board B2 is supplied with power via the BtoB connector B3 from a drive power supply IGA generated separately by the system power supply 11. This drive power supply IGA is a power supply separate from the above-mentioned small signal power supply SVCC, and is a power supply dedicated to the gate driver 3, which is a drive circuit.

[0037] 3 shows a power supply circuit of the small signal power supply SVCC on the GD board B2. On the GD board B2, a small signal power supply pattern P is provided for each of the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generated current sensor 7, the V-phase generated current sensor 8, the W-phase generated current sensor 9, and the reactor current sensor 10 so that the small signal power supply SVCC is supplied to each current sensor individually. 4S , P 5S , P 6S , P 7S , P8S , P 9S , P 10S and small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G is formed.

[0038] In addition, these small signal power supply patterns P 4S , P 5S , P 6S , P 7S , P 8S , P 9S , P 10S and small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G Among them, small signal power supply pattern P 4S , P 5S , P 6S , P 7S , P 8S , P 9S , P 10S corresponds to the first power supply wiring in the present invention, and the small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G corresponds to the first ground wiring in the present invention.

[0039] These small signal power supply patterns P 4S , P 5S , P 6S , P 7S , P 8S , P 9S , P 10S and small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G Among them, small signal power supply pattern P4S and small signal GND pattern P 4G The small signal power supply SVCC is supplied to the U-phase running current sensor 4, and the small signal power supply pattern P 5S and small signal GND pattern P 5G supplies the small signal power supply SVCC to the V-phase running current sensor 5, and the small signal power supply pattern P 6S and small signal GND pattern P 6G supplies the W-phase running current sensor 6 with a small signal power supply SVCC.

[0040] In addition, the small signal power supply pattern P 7S and small signal GND pattern P 7G The small signal power supply SVCC is supplied to the U-phase power generation current sensor 7, and the small signal power supply pattern P 8S and small signal GND pattern P 8G The small signal power supply SVCC is supplied to the V-phase power generation current sensor 8, and the small signal power supply pattern P 9S and small signal GND pattern P 9G supplies a small signal power supply SVCC to the W-phase generated current sensor 9. In addition, the small signal power supply pattern P 10S and small signal GND pattern P 10G supplies a small signal power supply SVCC to the reactor current sensor 10 of the step-up / step-down converter 1a.

[0041] Such a small signal power supply pattern P 4S , P 5S , P 6S , P 7S , P 8S , P 9S , P 10S and small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G Among them, the small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10GBetween the GND (ground potential) of the driving power supply IGA, capacitors C4 to C 10 are provided respectively.

[0042] That is, one end of the capacitor C4 is connected to the small signal GND pattern P 4G One end of the capacitor C5 is connected to the small signal GND pattern P 5G One end of the capacitor C6 is connected to the small signal GND pattern P 6G and the other end is connected to the GND (ground potential) of the drive power supply IGA.

[0043] In addition, one end of the capacitor C7 is connected to the small signal GND pattern P 7G One end of the capacitor C8 is connected to the small signal GND pattern P 8G and the other end is connected to the GND (ground potential) of the drive power supply IGA.

[0044] One end of the capacitor C9 is connected to the small signal GND pattern P 9G The other end is connected to the GND (ground potential) of the drive power supply IGA. 10 One end of the small signal GND pattern P 10G and the other end is connected to the GND (ground potential) of the drive power supply IGA.

[0045] In addition, the small signal power supply pattern P 4S , P 5S , P 6S , P 7S , P 8S , P 9S , P 10S and small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G Between 4b ~C10b These capacitors C 4b ~C 10b are bypass capacitors connected in parallel to the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generated current sensor 7, the V-phase generated current sensor 8, the W-phase generated current sensor 9 and the reactor current sensor 10.

[0046] That is, the capacitor C 4b One end is the small signal power supply pattern P 4S and the other end is connected to the small signal GND pattern P 4G It is connected to the capacitor C 5b One end is the small signal power supply pattern P 5S and the other end is connected to the small signal GND pattern P 5G It is connected to the capacitor C 6b One end is the small signal power supply pattern P 6S and the other end is connected to the small signal GND pattern P 6G is connected to

[0047] Capacitor C 7b One end is the small signal power supply pattern P 7S and the other end is connected to the small signal GND pattern P 7G It is connected to the capacitor C 8b One end is the small signal power supply pattern P 8S and the other end is connected to the small signal GND pattern P 8G It is connected to the capacitor C 9b One end is connected to the signal power supply pattern P 9S and the other end is connected to the small signal GND pattern P 9G It is connected to the capacitor C 10b One end is connected to the signal power supply pattern P 10S and the other end is connected to the small signal GND pattern P 10G is connected to

[0048] These capacitors C4 to C 10 , C 4b ~C 10bare circuit elements for reducing the effect of power supply noise on the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generated current sensor 7, the V-phase generated current sensor 8, the W-phase generated current sensor 9 and the reactor current sensor 10.

[0049] That is, capacitors C4 to C 10 The small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G By lowering the impedance of the small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G This reduces fluctuations in the current detection signal caused by voltage fluctuations in the

[0050] On the other hand, capacitor C 4b ~C 10b This reduces fluctuations in the current detection signal caused by power supply noise by suppressing the flow of power supply noise into the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generated current sensor 7, the V-phase generated current sensor 8, the W-phase generated current sensor 9 and the reactor current sensor 10.

[0051] In addition, the GD board B2 has the above-mentioned small signal power supply pattern P 4S , P 5S , P 6S , P 7S , P 8S , P 9S , P 10S and small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G In addition, the drive power supply pattern P aS , P bS , P cSand drive GND pattern P aG , P bG , P cG is formed.

[0052] In addition, these driving power supply patterns P aS , P bS , P cS and drive GND pattern P aG , P bG , P cG Among them, drive power supply pattern P aS , P bS , P cS corresponds to the second power supply wiring in the present invention, and the drive GND pattern P aG , P bG , P cG corresponds to the second ground wiring in the present invention.

[0053] The gate driver 3 has a drive power supply pattern P aS , P bS , P cS and drive GND pattern P aG , P bG , P cG As shown in the figure, the GD board B2 is provided with separate power supply patterns and GND patterns for the above-mentioned primary voltage sensor and secondary voltage sensor.

[0054] Next, the effects of the drive control device A according to this embodiment will be described in detail with reference to FIGS.

[0055] First, in this drive control device A, as shown in Figure 2, the small signal power supply SVCC is individually supplied from the ECU board B1 to the U-phase running current sensor 4, V-phase running current sensor 5, W-phase running current sensor 6, U-phase generated current sensor 7, V-phase generated current sensor 8, W-phase generated current sensor 9 and reactor current sensor 10 on the GD board B2, so that redundancy in the power supply to each current sensor can be ensured.

[0056] For example, if a power supply failure occurs to the U-phase running current sensor 4 due to poor contact of the connector 13, the small signal power supply SVCC normally supplies power to the other V-phase running current sensor 5, W-phase running current sensor 6, U-phase generated current sensor 7, V-phase generated current sensor 8, W-phase generated current sensor 9 and reactor current sensor 10.

[0057] That is, according to this drive control device A, even if a power supply failure occurs in any of the seven current sensors, it is possible to operate the current sensors other than the current sensor with the power supply failure normally. As a result, it is possible to ensure redundancy in the power supply to the multiple current sensors (small signal circuits).

[0058] In addition, in the drive control device A, as shown in FIG. 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G and the GND (ground potential) of the drive power supply IGA. 10 Since each small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G It is possible to reduce the impedance between the

[0059] That is, according to the drive control device A, the small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G It is possible to reduce the fluctuation of the current detection signal caused by the voltage fluctuation of the small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10GIt is possible to suppress a decrease in noise resistance of the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generated current sensor 7, the V-phase generated current sensor 8, the W-phase generated current sensor 9 and the reactor current sensor 10 caused by an increase in impedance with the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase generating current sensor 6, the U-phase generating current sensor 7, the V-phase generating current sensor 8, the W-phase generating current sensor 9 and the reactor current sensor 10.

[0060] Therefore, according to this embodiment, it is possible to provide a drive control device A that can suppress a decrease in noise resistance in multiple current sensors (small signal circuits) while ensuring redundancy in the power supply to multiple current sensors (small signal circuits).

[0061] In addition, according to the drive control device A, the small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G and the GND (ground potential) of the driving power supply IGA, that is, the small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G and drive signal GND pattern P aG , P bG , P cG Capacitors C4 to C 10 Since each of the U-phase running current sensor 4, V-phase running current sensor 5, W-phase running current sensor 6, U-phase generated current sensor 7, V-phase generated current sensor 8, W-phase generated current sensor 9 and reactor current sensor 10 is provided with a current sensor, it is possible to suppress a decrease in noise resistance for all of them.

[0062] The present invention is not limited to the above-described embodiment, and the following modifications are possible. (1) In the above embodiment, the present invention is applied to the drive control device A that drives and controls the PCU 1, but the present invention is not limited to this. The present invention can be applied to any circuit as long as it includes a drive circuit that receives a drive power supply from a first power supply wiring and a first ground wiring, generates a predetermined drive signal based on the drive power supply, and a small signal circuit that receives a small signal power supply from a second power supply wiring and a second ground wiring, and generates a control signal for controlling the drive circuit based on the small signal power supply.

[0063] (2) In the above embodiment, the present invention is applied to the small signal power supply SVCC supplying power to a plurality of current sensors (small signal circuits), but the present invention is not limited to this. For example, the small signal circuits to which the small signal power supply SVCC supplies power are not limited to a plurality of current sensors, that is, the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generated current sensor 7, the V-phase generated current sensor 8, the W-phase generated current sensor 9, and the reactor current sensor 10.

[0064] (3) In the above embodiment, the small signal power supply SVCC was supplied individually to each of the multiple small signal circuits on the GD board B2, i.e., the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generated current sensor 7, the V-phase generated current sensor 8, the W-phase generated current sensor 9, and the reactor current sensor 10, but the present invention is not limited to this.

[0065] For example, a power supply system to a U-phase running current sensor 4, a V-phase running current sensor 5, a W-phase running current sensor 6, a U-phase generated current sensor 7, a V-phase generated current sensor 8, a W-phase generated current sensor 9, and a reactor current sensor 10 as shown in Figure 6 may be considered.

[0066] For example, in the wiring method shown in FIG. 6(a), the small signal power supply SVCC is supplied individually to the four current sensors 4-6, and 10 from the ECU board B1, and for the remaining three current sensors 7-9, rather than supplying the small signal power supply SVCC from the ECU board B1, the small signal power supply SVCC is supplied by branching the power supply pattern and GND pattern between the connector 23 and the four current sensors 4-6, and 10 within the GD board B2.

[0067] The branching manner of the above-mentioned power supply pattern and GND pattern is as shown in the figure, where the power supply pattern and GND pattern between connector 23 and current sensor 4 are branched to supply the small signal power supply SVCC to current sensor 7, the power supply pattern and GND pattern between connector 23 and current sensor 5 are branched to supply the small signal power supply SVCC to current sensor 8, and the power supply pattern and GND pattern between connector 23 and current sensor 6 are branched to supply the small signal power supply SVCC to current sensor 9, but the branching manner is not limited to this.

[0068] In addition, in the wiring method shown in FIG. 6(b), the small signal power supply SVCC is supplied individually to the three current sensors 4 to 6 from the ECU board B1, and the small signal power supply SVCC is supplied to the remaining four current sensors 7 to 10 by branching the power supply pattern and GND pattern between the connector 23 and the three current sensors 4 to 6 within the GD board B2.

[0069] The branching manner of the above power supply pattern and GND pattern is, for example, as shown in Figure 6 (b), such that the power supply pattern and GND pattern between the connector 23 and the current sensor 4 are branched to supply the small signal power supply SVCC to the two current sensors 7 and 10, the power supply pattern and GND pattern between the connector 23 and the current sensor 5 are branched to supply the small signal power supply SVCC to the current sensor 8, and the power supply pattern and GND pattern between the connector 23 and the current sensor 6 are branched to supply the small signal power supply SVCC to the current sensor 9, but the branching manner is not limited to this.

[0070] This wiring method takes into consideration the fact that, among the three power converters, namely, the step-up / step-down converter, the driving inverter and the power generation inverter, the redundancy of the power supply to the current sensors 4-6 which detect the output current of the step-up / step-down converter is more important than the redundancy of the power supply to the other four current sensors 7-10.

[0071] That is, in the case of PCU1, the driving inverter that is directly related to driving the driving motor M is more important than the other step-up / step-down converter and the power generation inverter. Therefore, there may be cases where the current sensors 4 to 6 that detect the output current of the more important driving inverter are given priority for redundancy, and the other four current sensors 7 to 10 are not provided with redundant power supply. With this in mind, the power supply terminal of the present invention is configured so that small signal power is supplied to at least three driving current sensors with redundancy.

[0072] (4) In the above embodiment, the small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G and the GND (ground potential) of the driving power supply IGA, that is, the small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G and drive signal GND pattern P aG , P bG , P cG Capacitors C4 to C 10 However, the present invention is not limited to this.

[0073] That is, all small signal GND patterns P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G Capacitors C4 to C 10Instead of providing a small signal GND pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G A capacitor may be provided in a portion of the [Explanation of symbols]

[0074] A Drive control device B1 ECU board B2 GD board B3 BtoB Connector P 4S , P 5S , P 6S , P 7S , P 8S , P 9S , P 10S Small signal power supply pattern P 4G , P 5G , P 6G , P 7G , P 8G , P 9G , P 10G Small signal GND pattern P aS , P bS , P cS Drive signal power supply pattern P aG , P bG , P cG Drive signal GND pattern T Power supply terminal 1 PCU (Power Control Unit) 2 ECU2 3 Gate Driver 3a Buck-boost driver IC 3b Driving IC 3c Power generation drive IC 4 U-phase running current sensor 5V phase running current sensor 6 W-phase running current sensor 7 U-phase power generation current sensor 8 V-phase power generation current sensor 9 W-phase power generation current sensor 10 Reactor current sensor 11 System Power Supply 12 Tracker IC

Claims

1. a power supply terminal connected to an external power supply so as to have redundancy; a plurality of small signal circuits to which a small signal power supply input to the power supply terminal is supplied via a first power supply wiring and a first ground wiring; a drive circuit that receives a drive power source through a second power supply wiring and a second ground wiring and generates a predetermined drive signal based on the drive power source; a capacitor connected to the first ground wiring and the second ground wiring; The drive control device, wherein the capacitor is provided for each of the second ground wirings, the second ground wirings being provided in a plurality of portions corresponding to the plurality of small signal circuits.

2. The small signal circuit is a current sensor that detects an output current of a three-phase inverter, 2. The drive control device according to claim 1, wherein the drive circuit is a gate driver that generates a gate signal for controlling the three-phase inverter.

3. The small signal circuit comprises three driving current sensors which each detect the output current of a three-phase drive inverter which drives a driving motor, three generation current sensors which each detect the input current of a three-phase power generation inverter which converts three-phase AC power input from a generator into DC power, and a reactor current sensor which is provided between a battery and the three-phase drive inverter and the three-phase power generation inverter and detects a reactor current of a step-up / step-down converter which boosts the DC power input from the battery and outputs it to the three-phase drive inverter, while stepping down the DC power input from the three-phase drive inverter and / or the three-phase power generation inverter and outputs it to the battery; 3. The drive control device according to claim 1, wherein the drive circuit is a gate driver that generates gate signals for controlling the drive three-phase inverter, the power generation three-phase inverter, and the step-up / step-down converter.

4. A drive control device as described in Claim 3, characterized in that the power supply terminal is configured so that the small signal power supply is supplied to at least the three running current sensors while providing redundancy.

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