JP2010119180A - Control device of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device of a vehicle, which controls travel of the vehicle based on consumption information of excess energy. <P>SOLUTION: The control device 10 of the vehicle includes a load circuit comprising a rotating electric machine driving the vehicle, a power storage device 12 connected to the load circuit, a judging means judging whether power generated by the load circuit exceeds a charging power limit value with respect to the power storage device 12 or not, a power consumption circuit 80 which comprises a resistance element 82 and a transistor 86 and consumes excess power generated by the load circuit, and a control part 110 operating the power consumption circuit 80 when the judging means judges that power exceeds the charging power limit value and controlling travel of the vehicle based on an extended charging power limit value obtained by adding consumable power by the power consumption circuit 80 to the charging power limit value. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle control device, and more particularly to a vehicle control device having a rotating electrical machine.

  In a hybrid vehicle or the like including an engine and a rotating electric machine, when the rotating electric machine functions as a generator, the generated electrical energy is charged in the power storage device. However, when charging of the power storage device continues, the power storage device is fully charged. If charging is continued as it is, overcharging occurs and the life of the power storage device may be shortened.

  In Patent Document 1, the regenerative energy at the time of braking is set, the regenerative energy generated by the traveling motor is controlled so as to be the set regenerative energy, and surplus energy that cannot be stored with the predetermined capacity of the battery is included in the regenerative energy. It is disclosed to connect a resistor and an inverter connected to a traveling motor so that the resistor is consumed.

JP 2004-222395 A

  According to the configuration of Patent Document 1, surplus energy that cannot be stored with a predetermined capacity of the battery among the regenerative energy can be consumed by the resistor. However, in the configuration of Patent Document 1, it is not described that the vehicle is controlled based on information or the like that allows surplus energy to be consumed by the resistor, and the vehicle is controlled within a relatively narrow vehicle travel control range. There is a need to do.

  The objective of this invention is providing the control apparatus of the vehicle which controls a vehicle based on consumption information etc. of surplus energy.

  A vehicle control device according to the present invention includes a load circuit including a rotating electrical machine that drives a vehicle, a power storage device connected to the load circuit, and power generated by the load circuit exceeds a charge power limit value for the power storage device. A determination means for determining whether or not the power consumption circuit is configured to include a resistance element and a transistor and consumes surplus power generated by the load circuit; and the determination means determines that the charge power limit value is exceeded And a control unit for operating the vehicle based on an extended charge power limit value obtained by adding the power that can be consumed by the power consumption circuit to the charge power limit value.

  In the vehicle control apparatus according to the present invention, the load circuit further includes an inverter circuit and a step-up / down circuit, and consumes power based on the output and loss of the rotating electrical machine and the loss between the inverter circuit and the step-up / down circuit. It is preferable to further include means for determining whether or not the circuit can be operated and a duty ratio for on / off control of the transistor when the circuit is operated.

  Further, in the vehicle control device according to the present invention, based on whether the current value flowing through the power storage device is a current value obtained by adding the current value flowing through the power consumption circuit to the original current value flowing through the power storage device. It is preferable to further include a failure detection means for detecting a failure of the transistor of the power consumption circuit.

  The vehicle control device according to the present invention may further include a relay circuit provided between the power storage device and the load circuit, and the relay circuit may be turned off when an on failure of the transistor is detected by the failure detection means. preferable.

  In the vehicle control apparatus according to the present invention, it is preferable that the transistor off-fault is detected after the transistor on-fault is detected.

  With the above configuration, it is possible to set a charging power limit value expanded by adding power consumed by the power consuming circuit to the charging power limit value, and to perform vehicle travel control based on the extended charging power limit value. . As a result, the vehicle can be controlled within a relatively wide vehicle travel control range.

  According to the vehicle control apparatus having the failure detection means having the above-described configuration, it is possible to detect a failure of the transistor of the power consumption circuit. Thereby, it is possible to cope with the failed transistor.

  According to the vehicle control device that turns off the relay circuit when an on-failure of the above configuration is detected, the current flowing through the resistance element can be stopped by separating the power storage device serving as the power source and the resistance element. Thereby, the temperature rise of a resistive element can be stopped.

  According to the control apparatus for a vehicle that detects an on-failure of a transistor after detecting an on-failure of the transistor having the above-described configuration, it is possible to preferentially stop the temperature rise of the resistance element caused by the on-failure of the transistor.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. In the following description, the power supply system is described as having two motor generators, but the number is not limited, and for example, it may be one motor generator. In the following description, the vehicle driven by the rotating electrical machine is described as a hybrid vehicle, but may be an electric vehicle. Further, in this description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating understanding of the present invention, and can be appropriately changed according to the use, purpose, specification, and the like.

  FIG. 1 is a diagram illustrating a vehicle control apparatus 10 according to an embodiment of the present invention. The vehicle control device 10 includes a power supply device 100 and a control unit 110. First motor generator 60 and second motor generator 70 are driven by power supply device 100. Hereinafter, the power supply apparatus 100 will be described, and the first motor generator 60, the second motor generator 70, and the control unit 110 will be described in this order.

  The power supply device 100 includes a power storage device 12, a current sensor 14, a first relay circuit unit 16, a second relay circuit unit 20, a third relay circuit unit 23, capacitors 28 and 40, a step-up / down converter 39, The first inverter circuit 200, the second inverter circuit 300, and the power consumption circuit 80 are included.

The power storage device 12 is a battery for supplying power to the first motor generator 60 and the second motor generator 70. The power storage device 12 is a DC power source that can be charged and discharged, and is formed of a secondary battery such as nickel hydride or lithium ion. The current sensor 14 is a current sensor that is connected in series to one terminal of the power storage device 12 and measures a current value flowing to the power storage device 12. Note that the current value flowing to the power storage device 12 is described as being measured using the current sensor 14, but the total power value for the circuit driven by the power storage device 12 of the vehicle control device 10 is expressed by the capacitor 28. You may obtain | require and estimate from the value divided by the both-ends voltage _VL .

  The first relay circuit unit 16 is a relay connected in series to the current sensor 14 and controls connection or disconnection according to a control command from the control unit 110. The second relay circuit unit 20 is configured by connecting a resistance element 22 and a relay 18 that controls connection or disconnection in accordance with a control command from the control unit 110 in series. Second relay circuit unit 20 is connected in series to the other terminal of power storage device 12. The third relay circuit unit 23 is a relay connected in parallel to the second relay circuit unit 20, and controls connection or disconnection according to a control command from the control unit 110.

  The capacitor 28 is connected between the power supply line 24 and the ground line 26 and is a smoothing capacitor that smoothes voltage fluctuations between the power supply line 24 and the ground line 26.

  The step-up / down converter 39 includes a coil 30 connected in series with the power supply line 24, a transistor 32 connected between the coil 30 and the power supply line 50, and a transistor connected between the coil 30 and the ground line 52. 34, a diode 36 connected in parallel to the transistor 32, and a diode 38 connected in parallel to the transistor 34.

  Buck-boost converter 39 boosts the DC voltage received from power storage device 12 using coil 30 based on a control signal from control unit 110, and supplies the boosted boosted voltage to power supply line 50. More specifically, the step-up / step-down converter 39 accumulates current flowing in accordance with the switching operation of the transistor 34 as electromagnetic energy in the coil 30 based on a control signal from the control unit 110. Thereby, the DC voltage from power storage device 12 is boosted. The step-up / step-down converter 39 outputs the boosted boosted voltage to the power supply line 50 via the diode 36 in synchronization with the timing when the transistor 34 is turned off.

  Further, the step-up / step-down converter 39 steps down the DC voltage received from the first inverter circuit 200 or the second inverter circuit 300 based on the control signal from the control unit 110 and charges the power storage device 12.

  The capacitor 40 is connected between the power supply line 50 and the ground line 52 and is a smoothing capacitor that smoothes voltage fluctuations between the power supply line 50 and the ground line 52.

  As a component of the first inverter circuit 200, a transistor 210 and a transistor 220 are connected in series between the power supply line 50 and the ground line 52. In addition, a diode 212 is connected in parallel to the transistor 210, and a diode 222 is connected in parallel to the transistor 220.

  As another component of the first inverter circuit 200, a transistor 230 and a transistor 240 are connected in series between the power supply line 50 and the ground line 52. A diode 232 is connected in parallel to the transistor 230, and a diode 242 is connected in parallel to the transistor 240.

  As yet another component of the first inverter circuit 200, a transistor 250 and a transistor 260 are connected in series between the power supply line 50 and the ground line 52. A diode 252 is connected in parallel to the transistor 250, and a diode 262 is connected in parallel to the transistor 260. Note that, as shown in FIG. 1, the second inverter circuit 300 is also composed of the same elements as the first inverter circuit 200, and thus detailed description thereof is omitted.

  The first inverter circuit 200 and the second inverter circuit 300 convert the DC voltage of the capacitor 40 into an AC voltage during powering and supply the AC voltage to the first motor generator 60 or the second motor generator 70, whereby the first motor generator 60 or Second motor generator 70 is driven to rotate. In addition, the first inverter circuit 200 and the second inverter circuit 300 convert the AC voltage generated by the first motor generator 60 or the second motor generator 70 into a DC voltage during regeneration and supply it to the power storage device 12. The power storage device 12 is charged.

  The power consumption circuit 80 is a circuit that consumes surplus power that cannot be charged in the power storage device 12 among the power generated by the first motor generator 60 or the second motor generator 70. The power consumption circuit 80 includes a diode 84, a transistor 86, and a resistance element 82 that consumes surplus power. The resistance element 82 and the transistor 86 are connected in series, one end is connected to the power supply line 24, and the other end is connected to the ground line 26. The diode 84 is connected to the resistance element 82 in parallel. The transistor 86 is turned on / off under the control of the control unit 110. The resistance element 82 is provided with a temperature sensor (not shown) for measuring the temperature.

  First motor generator 60 includes a U-phase coil 62, a V-phase coil 64, and a W-phase coil 66. U-phase coil 62 is a coil connected between a connection point between transistor 210 and transistor 220 and neutral point 68. V-phase coil 64 is a coil connected between a connection point between transistor 230 and transistor 240 and neutral point 68. W-phase coil 66 is a coil connected between a connection point between transistor 250 and transistor 260 and neutral point 68. As shown in FIG. 1, the second motor generator 70 is configured by the same elements as the first motor generator 60, and thus detailed description thereof is omitted.

  The control unit 110 is a control device that controls the power supply device 100 and the like in the vehicle control device 10. The control unit 110 performs on / off control of each transistor constituting the step-up / down converter 39, the first inverter circuit 200, the second inverter circuit 300, and the power consumption circuit 80, thereby causing each circuit to function. In addition, control unit 110 has a function of monitoring SOC (State Of Charge) indicating the state of charge of power storage device 12. Control unit 110 also controls vehicle travel based on the charging power limit value for power storage device 12. Specifically, it has a function of adding the amount of surplus power that can be consumed by the power consumption circuit 80 to the charge power limit value and performing regeneration control of the vehicle with the extended charge power limit value. The control of the transistor 86 of the power consumption circuit 80 will be described later.

Control unit 110 turns on transistor 86 of power consumption circuit 80 when the power generated by first motor generator 60 or second motor generator 70 and input to power storage device 12 exceeds the charge power limit value. Thereafter, the control to turn off is performed. Here, the control unit 110 can also define a switching interval such that the transistor 86 is not turned on until a predetermined period (for example, 100 microseconds) has elapsed after the transistor 86 is turned on. The transistor 86 of the power circuit 80 may be turned on when the power storage device 12 is overcharged, it is turned on based on the voltage V _L of the voltage V _B and the capacitor 28 of the power storage device 12 Good.

  Further, the control unit 110 controls the first relay circuit unit 16, the second relay circuit unit 20, and the third relay circuit unit 23. Here, the state in which the power storage device 12 is connected to the load circuit connected to the power supply line 24 and the ground line 26 is referred to as SMR connection, and the state in which the power storage device 12 is disconnected from the load circuit is referred to as SMR release. Call. SMR connection means that the relay of the first relay circuit unit 16 is in a connected state and at least one of the relay 18 of the second relay circuit unit 20 and the relay of the third relay circuit unit 23 is in a connected state. Say. Moreover, SMR opening means that the relay of the 1st relay circuit part 16 is a disconnection state, and the relay 18 of the 2nd relay circuit part 20 and the relay of the 3rd relay circuit part 23 are a disconnection state. Here, the load circuit is a combination of the capacitors 28 and 40, the buck-boost converter 39, the first inverter circuit 200, the second inverter circuit 300, the first motor generator 60, and the second motor generator 70.

  The power input to the power storage device 12 includes output power and loss generated by the first motor generator 60, output power and loss generated by the second motor generator 70, the first inverter circuit 200, and the second inverter circuit. It can be calculated by adding the loss of 300 and the loss of the boost converter 39. In addition, the control unit 110 generates the output power and loss generated by the first motor generator 60 and the power generated by the second motor generator 70 when the power input to the power storage device 12 exceeds the charge power limit value. The duty ratio of the on / off control of the transistor 86 can be calculated based on the output power and loss, the loss of the first inverter circuit 200 and the second inverter circuit 300, and the loss of the boost converter 39.

  Next, the operation of the vehicle control apparatus 10 having the above configuration will be described with reference to FIGS. FIG. 2 is a flowchart illustrating a procedure for consuming surplus power by the power consumption circuit 80 when the power input to the power storage device 12 in the vehicle control device 10 exceeds the charge power limit value. Control unit 110 calculates the input power generated by first motor generator 60 or second motor generator 70 and input to power storage device 12 (S12).

  It is determined whether or not the input power calculated in S12 exceeds a charging power limit value for the power storage device 12 (S14). If the input power does not exceed the charging power limit value, the process returns to S12.

  If the input power exceeds the charge power limit value, a power value that can be consumed in the power consumption circuit 80 is added to the charge power limit value and set as an extended charge power limit value (S16). Thereafter, regeneration control of the vehicle is performed based on the extended charging power limit value (S18). Then, it progresses to S20.

  In S20, the duty ratio of the on / off control of the transistor 86 of the power consumption circuit 80 is calculated based on the power difference between the input power and the charge power limit value (S20). Then, on / off control of the transistor 86 is performed based on the duty ratio calculated in S20 (S22). Thereafter, the process proceeds to END processing. Thus, by performing on / off control of the transistor 86 of the power consumption circuit 80, surplus power exceeding the charge power limit value among the power generated by the first motor generator 60 or the second motor generator 70 is converted into the power consumption circuit 80. It can be consumed by the resistance element 82. Furthermore, since the regeneration control of the vehicle can be performed by the extended charging power limit value obtained by adding the power that can be consumed in the power consumption circuit 80 to the charging power limit value, the vehicle can be controlled in a wider range of vehicle travel control. Can do.

  Here, since the transistor 86 is used in the power consuming circuit 80, the transistor may fail. The failure mode of the transistor 86 includes an on failure and an off failure, and it is necessary to detect these failures. Hereinafter, characteristics of the on-failure and off-failure of the transistor 86 will be described, and a detection method using the characteristics and a response after the detection will be described.

  FIG. 3A is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor 86 is normal in the power consumption circuit 80 and the vertical axis represents the voltage across the capacitor 40. FIG. 3B is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor 86 is normal in the power consumption circuit 80 and the vertical axis represents the current value flowing through the power storage device 12. FIG. 4A is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor 86 has an on-failure, and the vertical axis represents the voltage across the capacitor 40. FIG. 4B is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor 86 has an on-failure, and the vertical axis represents the current value flowing through the power storage device 12.

As shown in FIG. 3A, when the precharge of the power supply device 100 is started, the voltage across the capacitor 40 is gradually charged from 0 V toward the voltage V _B across the power storage device 12. As shown in FIG. 3B, the value of the current flowing through the power storage device 12 becomes an instantaneous peak current value when the precharge of the power supply device 100 is started, and then the current value gradually decreases. Eventually it becomes zero.

  4A also has the same characteristics as FIG. 3A, but in FIG. 4B, an instantaneous peak current flows when precharging of the power supply device 100 is started, and thereafter The current value gradually decreases as in FIG. 3B, but the current value does not become zero and a constant current continues to flow. This is due to the presence of a current that continues to flow through the resistance element 82 because the transistor 86 is in an on-state failure while being in the on-state. Therefore, if a current continues to flow through power storage device 12 after a predetermined time has elapsed since the start of precharging of power supply device 100, it can be detected that transistor 86 is on-failed. In addition to the above functions, control unit 110 measures the value of the current flowing through power storage device 12 after a predetermined time has elapsed since the start of precharge, and when a current value equal to or greater than a predetermined value is detected. The transistor 86 has a function of determining that it is an on failure. Thereby, the transistor 86 can detect an on-failure.

  Next, a method for detecting a failure of the transistor 86 using another characteristic will be described. FIG. 5A is a characteristic diagram in which the horizontal axis represents time during travel of the vehicle and the vertical axis represents the value of current flowing through the power storage device 12. FIG. 5B is a diagram illustrating a signal for turning on the transistor 86 of the power consumption circuit 80. As shown in FIG. 5A, during actual vehicle travel, if transistor 86 is normal, the current value of power storage device 12 is positive during power running as indicated by the solid line, and the power storage device during regeneration. 12 current values are on the negative side. When an on command for the power consumption circuit 80 as shown in FIG. 5B is issued, a current flows through the resistance element 82 during the period in which the transistor 86 is on, and the current value Minutes will be added to the positive side. On the other hand, when the transistor 86 is in an on-failure state, as indicated by the dotted line, the characteristic value is obtained by always adding the current value flowing through the resistance element 82 to the positive side. Therefore, when transistor 86 is on-failed, there is a difference between the estimated current value flowing through power storage device 12 as the system control command value for the vehicle and the current value actually flowing through power storage device 12. Here, the estimated current value flowing through power storage device 12 can be calculated based on the torque values, rotation speed, conversion coefficient, loss, and the like of first motor generator 60 and second motor generator 70.

  In addition to the above function, control unit 110 further includes a function of calculating an estimated current value flowing through power storage device 12, and a transistor 86 based on a difference between a current value flowing through power storage device 12 and a current estimated value flowing through power storage device 12. It has a function to detect the failure of.

  Next, detection of an on failure of the transistor 86 of the power consumption circuit 80 will be described with reference to FIG. FIG. 6 is a flowchart showing a procedure for detecting an on-failure of the transistor 86 of the power consumption circuit 80. First, control unit 110 calculates an estimated current value flowing through power storage device 12 (S30).

  Next, it is determined whether or not there is an ON command in the power consumption circuit 80 (S32). If there is an ON command, the process returns to S30 again. If there is no ON command, the process proceeds to S34. In S34, a value obtained by subtracting the estimated current value of power storage device 12 from the actual current value of power storage device 12 is obtained, and it is determined whether or not the value exceeds a predetermined value (S34). If it is determined that the value does not exceed the predetermined value, the process proceeds to return processing. On the other hand, if it is determined that the value exceeds the predetermined value, it is determined that the transistor 86 is on-failed (S36). Thereafter, the process proceeds to return processing. In this manner, the on-failure of the transistor 86 can be detected based on the difference between the estimated current value flowing through the power storage device 12 and the current value actually flowing through the power storage device 12.

  Although the detection of the on-failure of the transistor 86 has been described above, the off-failure of the transistor 86 can also be detected based on the characteristics shown in FIGS. Here, when control is performed to turn on the transistor 86 with no failure, a difference between a predetermined value occurs between the estimated current value flowing through the power storage device 12 and the current value actually flowing through the power storage device 12 as described above. However, when the transistor 86 is off-failed, no current flows through the resistance element 82. Therefore, there is no difference between the estimated current value flowing through power storage device 12 and the current value actually flowing through power storage device 12. As a result, it is possible to detect an off failure of the power consumption circuit 80.

  When the off failure of the transistor 86 is detected, if the off failure is left as it is, there is a possibility that the power storage device 12 is deteriorated. Therefore, the control unit 110 notifies that the off failure has occurred. You can also encourage them to exchange. In addition, the control unit 110 suppresses the maximum value of the torque when an off-failure is detected and reduces the rate of change, thereby suppressing the amount of transient power fluctuation during slip / grip and degrading the power storage device 12. It is also possible to shift to vehicle driving that does not lead to

  Next, a method for detecting a failure of the transistor 86 using still another characteristic will be described. FIG. 7A is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor 86 is normal without failure and the vertical axis represents the voltage across the capacitor 40. FIG. 7B is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor 86 is normal without failure and the vertical axis represents the current value flowing through the power storage device 12. FIG. 7C is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor 86 is normal without failure, and the vertical axis represents the temperature indicated by the temperature sensor of the resistance element 82. FIG. 8A is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor 86 has an on-failure, and the vertical axis represents the voltage across the capacitor 40. FIG. 8B is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor 86 has an on-failure, and the vertical axis represents the value of the current flowing through the power storage device 12. FIG. 8C is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor 86 has an on-failure and the vertical axis represents the temperature indicated by the temperature sensor of the resistance element 82.

  7A and 7B and FIGS. 8A and 8B are characteristic diagrams similar to FIGS. 3A and 3B and FIGS. 4A and 4B, respectively. Detailed description is omitted. As shown in FIG. 7C, when the transistor 86 has no on failure, the temperature of the resistance element 82 remains constant even when the precharge of the power supply device 100 is started. As shown in FIG. 8C, when the transistor 86 has an on-failure, when the precharge of the power supply device 100 is started, a current flows through the resistance element 82, and thus the temperature of the resistance element 82 increases. In addition to the above function, the control unit 110 further determines that the transistor 86 has an on-failure when the temperature of the resistance element 82 after a predetermined time has elapsed since the start of precharging has exceeded a predetermined value. Has a function to judge. Thereby, an on-failure of the transistor 86 can be detected.

  In addition, when an on-failure of the transistor 86 is detected by any of the above methods, the control unit 110 has a function of performing SMR opening control so as to disconnect the power storage device 12 and the load circuit. Thereby, it is possible to stop the current that continues to flow through the resistance element 82, and to suppress the temperature rise of the resistance element 82. Further, when detecting both the on-failure and the off-failure of the transistor 86, the off-failure is detected after the on-failure is detected. Thereby, if the transistor 86 is on-failed, the temperature rise of the resistance element 82 can be suppressed more quickly.

It is a figure which shows the control apparatus of the vehicle which is one Embodiment of this invention. 4 is a flowchart showing a procedure for consuming surplus power by a power consuming circuit when power input to a power storage device exceeds a charge power limit value in a vehicle control device. (A) is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor is normal without failure and the vertical axis represents the voltage across the capacitor. (B) is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor is normal without failure, and the vertical axis represents the current value flowing through the power storage device. (A) is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor has an ON failure, and the vertical axis represents the voltage across the capacitor. (B) is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor has an on-failure, and the vertical axis represents the current value flowing through the power storage device. (A) is a characteristic diagram with the horizontal axis representing the time during which the vehicle is traveling and the vertical axis representing the current value flowing through the power storage device. (B) is a diagram showing a signal for turning on the transistor of the power consumption circuit. It is a flowchart which shows the procedure which detects the ON failure of the transistor of a power consumption circuit. (A) is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor is normal without failure and the vertical axis represents the voltage across the capacitor. (B) is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor is normal without failure, and the vertical axis represents the current value flowing through the power storage device. (C) is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor is normal without failure and the vertical axis represents the temperature indicated by the temperature sensor of the resistance element. (A) is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor has an ON failure, and the vertical axis represents the voltage across the capacitor. (B) is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor has an on-failure, and the vertical axis represents the current value flowing through the power storage device. (C) is a characteristic diagram in which the horizontal axis represents the precharge time when the transistor has an on-failure and the vertical axis represents the temperature indicated by the temperature sensor of the resistance element.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Control apparatus, 12 Power storage apparatus, 14 Current sensor, 16 1st relay circuit part, 18 relay, 20 2nd relay circuit part, 22, 82 Resistance element, 23 3rd relay circuit part, 24, 50 Power supply line, 26, 52 ground line, 28, 40 capacitor, 30 coil, 32, 34, 86, 210, 220, 230, 240, 250, 260 transistor, 36, 38, 84, 212, 222, 232, 242, 252, 262 diode, 39 Step-up Converter, 60 First Motor Generator, 62 U-phase Coil, 64 V-phase Coil, 66 W-phase Coil, 68 Neutral Point, 70 Second Motor Generator, 80 Power Consumption Circuit, 100 Power Supply Device, 110 Control Unit, 200 1st inverter circuit, 300 2nd inverter circuit.

Claims (5)

A load circuit including a rotating electrical machine that drives the vehicle;
A power storage device connected to the load circuit;
Determining means for determining whether or not the power generated by the load circuit exceeds a charge power limit value for the power storage device;
A power consumption circuit configured to include a resistance element and a transistor, and to consume surplus power generated by the load circuit;
The vehicle is operated based on the extended charge power limit value obtained by adding the power that can be consumed by the power consumption circuit to the charge power limit value while operating the power consumption circuit when the determination means determines that the charge power limit value is exceeded. A control unit that performs the traveling control of
A vehicle control apparatus comprising: The vehicle control device according to claim 1,
The load circuit further includes an inverter circuit and a step-up / down circuit,
And further comprising means for determining whether or not to operate the power consuming circuit based on the output and loss of the rotating electrical machine and the loss of the inverter circuit and the step-up / step-down circuit and the duty ratio of the on / off control of the transistor in the case of operating A vehicle control device. The vehicle control device according to claim 1 or 2,
A failure that detects a failure of a transistor in the power consumption circuit based on whether or not the current value flowing through the power storage device is a current value obtained by adding the current value flowing through the power consumption circuit to the original current value flowing through the power storage device A control apparatus for a vehicle, further comprising detection means. The vehicle control device according to claim 3,
A relay circuit provided between the power storage device and the load circuit;
A vehicle control device that turns off a relay circuit when an on-failure of a transistor is detected by a failure detection means. The vehicle control device according to claim 3 or 4,
A control device for a vehicle, wherein an off failure of a transistor is detected after an on failure of the transistor is detected.

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