JP2016178772A - Vehicle control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle control device which can determine the deterioration state of a circuit breaker caused by mechanical operation of the circuit breaker.SOLUTION: A vehicle control device includes a converter, a circuit breaker and a determination part. The converter converts electric power obtained via a current collection part to electric power of a motor for an electric motor vehicle. The circuit breaker is set between the current collection part and the converter. The determination part acquires a first evaluation value found by adding a coefficient corresponding to an integrated value of electric current flowing to the circuit breaker until the circuit breaker operates on the basis of the operation, and determines that the circuit breaker is in a deteriorated condition when the first evaluation value exceeds a first threshold value preliminarily determined.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a vehicle control device.

  In general, a circuit breaker (for example, a high-speed circuit breaker (HSCB), a line breaker (LB), a vacuum circuit breaker (VCB), etc.) is used in a vehicle control device used for power conversion of a railway electric vehicle or the like. It is used. Such a circuit breaker interrupts an electric circuit by mechanical operation when a failure or the like occurs. Thereby, the electric current which flows into an electric circuit is interrupted | blocked. The circuit breaker deteriorates due to the mechanical operation of such connection / disconnection.

However, conventionally, the method for determining the deterioration state of the circuit breaker has been performed based on, for example, the contact resistance of the circuit breaker or electrical data relating to the circuit breaker.

  On the other hand, in such a conventional method, the mechanical operation of the circuit breaker has not been considered. Therefore, the vehicle control device cannot determine the deterioration state of the circuit breaker due to the mechanical operation of the circuit breaker.

JP 2013-73782 A JP 2010-266319 A

  Provided is a vehicle control device capable of determining a deterioration state of a circuit breaker caused by a mechanical operation of the circuit breaker.

  The control apparatus for vehicles by one Embodiment is provided with a conversion part, a circuit breaker, and the determination part. The conversion unit converts the electric power obtained through the current collecting unit into electric power of an electric motor for an electric vehicle. The circuit breaker is provided between the current collector and the converter. The determination unit obtains a first evaluation value obtained by adding a coefficient corresponding to an integrated value of the current flowing through the circuit breaker until the circuit breaker operates based on the operation, and a first evaluation value is determined in advance. When the threshold value is exceeded, it is determined that the circuit breaker has deteriorated.

The figure which shows an example of a structure of the control apparatus 1 for vehicles by one Embodiment. 4 is a time chart showing an example of a control operation of the control unit 110. The figure which shows an example of the coefficient based on the integrated value of the electric current in a circuit breaker. The figure which shows an example of the coefficient based on the electric current value which flows into a circuit breaker when interrupting a circuit breaker. The figure which shows an example of the relationship between the 1st evaluation value in the determination part 120, and threshold value T1. The figure which shows an example of the relationship between the 2nd evaluation value in the determination part 120, and threshold value T2.

Embodiments according to the present invention will be described below with reference to the drawings. This embodiment does not limit the present invention.
(One embodiment)
FIG. 1 is a diagram illustrating an example of a configuration of a vehicle control device 1 according to an embodiment. The vehicle control device 1 is mounted on, for example, a railway vehicle.

  The vehicle control device 1 includes a motor 10, a power converter 20, a capacitor 40, a voltage detector 50, a first circuit breaker 60, a second circuit breaker 70, a third circuit breaker 80, and a resistor. 90, a current detector 100, a control unit 110, a determination unit 120, a changing unit 130, and a display unit 140.

  The motor 10 drives the wheels of the electric vehicle to run the electric vehicle. The motor 10 is, for example, a three-phase AC motor, and is a permanent magnet synchronous motor (PMSM).

  For example, the power conversion unit 20 controls the switching of a plurality of switching elements based on a gate command, thereby converting the DC power obtained from the overhead line through the current collector 30 into AC power (for example, three-phase AC power). It is an inverter circuit that converts to As described above, the power conversion unit 20 converts the electric power obtained through the current collector 30 into electric power for driving the electric motor 10 for an electric vehicle. The capacitor 40 is provided to reduce noise.

  The voltage detector 50 is connected to both ends of the capacitor 40 and detects the capacitor voltage Vo applied to both ends of the capacitor 40.

  Each of the 1st circuit breaker 60, the 2nd circuit breaker 70, and the 3rd circuit breaker 80 as a circuit breaker is provided between the current collection part 30 and the power conversion part 20. FIG. One end of the first circuit breaker 60 is connected to the current collector 30, and the other end is connected to the second and third circuit breakers 70 and 80 via the current detector 100. One end of the second circuit breaker 70 is connected to the first circuit breaker 60, and the other end is connected to the power conversion unit 20 via the resistor 90. One end of the third circuit breaker 80 is connected to the first circuit breaker 60, and the other end is connected to the power conversion unit 20. Thus, the second circuit breaker 70 and the resistor 90 are connected in series between the first circuit breaker 60 and the power conversion unit 20. The third circuit breaker 80 is connected in parallel to the second circuit breaker 70 and the resistor 90.

  Each of the 1st circuit breaker 60, the 2nd circuit breaker 70, and the 3rd circuit breaker 80 has a function which interrupts | blocks accident currents, such as a short circuit current. Each of the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80 is a machine between the current collector 30 and the power converter 20 when a current exceeding a predetermined rated current flows. Electrically shuts off with normal operation. Since the rated currents of the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80 are used to interrupt the accident current flowing through the power conversion unit 20, they may be the same. Further, the breaking capacity of the first breaker 60 has a larger value than the breaking capacity of the third breaker 80. Furthermore, the breaking capacity of the third breaker 80 has a larger value than the breaking capacity of the second breaker 70. The first circuit breaker 60 is, for example, a high-speed circuit breaker (HSCB: High Speed Circuit Breaker). The 2nd circuit breaker 70 and the 3rd circuit breaker 80 are a line breaker (LB: Line Breaker), for example.

  Here, the rated current means a current value serving as a reference for opening the circuit breaker. For this reason, the circuit breaker is opened when a current larger than the rated current flows through the circuit breaker. On the other hand, the breaking capacity means the maximum current that can be broken by the breaker. For this reason, the circuit breaker cannot interrupt the current exceeding the breaking capacity. The rated current and breaking capacity are predetermined for each breaker. The rated current may be used as a reference for opening the circuit breaker, and a current value obtained by adding a predetermined value to the rated current may be used as a reference for opening the circuit breaker.

  As described above, the first circuit breaker 60 is connected to the current collecting unit 30 side, and the second circuit breaker 70 and the third circuit breaker 80 having a smaller breaking capacity than the first circuit breaker 60 are connected to the power conversion unit 20 side. Is done. Thereby, when the breaking capacity of either the second breaker 70 or the third breaker 80 is insufficient with respect to an overcurrent such as a short circuit current, the current flowing in the electric circuit by breaking the first breaker 60 Shut off.

  When starting the power supply, the first circuit breaker 60 and the second circuit breaker 70 are closed, and the third circuit breaker 80 is opened. At this time, since the capacitor 40 is not charged, the voltage across the capacitor 40 detected by the voltage detector 50 is 0 volts. When power is supplied to such a capacitor 40 with a low resistance, a large inrush current flows. In order to suppress such an inrush current, power supply is started by supplying power to the capacitor 40 via the first circuit breaker 60, the second circuit breaker 70, and the resistor 90. This prevents an inrush current from flowing through the capacitor 40. Thereafter, when the voltage Vo of the capacitor 40 reaches a predetermined threshold voltage Vth, the third circuit breaker 80 is closed and the second circuit breaker 70 is opened. During normal travel, power is supplied to the power converter 20 via the first and third circuit breakers 60 and 80.

  Each of the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80 is provided with auxiliary contacts 61, 71, 81 for detecting open / close. Each auxiliary contact 61, 71, 81 outputs signals S61, S71, S81 indicating Open or Close. Thereby, each open (close) of the 1st circuit breaker 60, the 2nd circuit breaker 70, and the 3rd circuit breaker 80 can be detected. Specifically, the control unit 110 closes the contactors 60, 70, and 70 when the signals S61, S71, and S81 from the auxiliary contacts 61, 71, and 81 have feedback (voltage application), respectively. When it is detected that the signals S61, S71, and S81 are not fed back (no pressure applied), it is detected that the contactors 60, 70, and 70 are open.

  Further, the current detector 100 is connected between the first circuit breaker 60 and the connection section of the second circuit breaker 70 and the third circuit breaker 80 on the first circuit breaker 60 side. The current detector 100 detects the current value flowing through the first circuit breaker 60 (that is, the sum of the current values flowing through the second circuit breaker 70 and the third circuit breaker 80). Hereinafter, the current value detected by the current detector 100 is defined as a current value Im.

  The inductance on the third circuit breaker 80 side is very low compared to the second circuit breaker 70 side having the resistor 90. Therefore, when both the second circuit breaker 70 and the third circuit breaker 80 are connected, The current flowing through the two circuit breaker 70 may be treated as zero. Therefore, in a state where both the second circuit breaker 70 and the third circuit breaker 80 are closed, it can be said that the current detector 100 detects the current flowing through the third circuit breaker 80. In addition, in a state where one of the second circuit breaker 70 and the third circuit breaker 80 is closed, the current detector 100 detects a current flowing through one of them.

  Next, the control part 110 is demonstrated using FIG.1 and FIG.2. 1 includes a current value Im from the current detector 100, a voltage value Vo from the voltage detector 50, signals S61, S71, S81 output from the auxiliary contacts 61, 71, 81, and a control state signal. CNT or the like is received via the input / output unit 101. The control unit 110 controls the opening / closing of each of the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80 via the input / output unit 101 based on those values and signals. In addition, the switching (ON / OFF) of the switching element of the power conversion unit 20 is controlled.

  The control status signal CNT includes various control signals and status signals such as a signal indicating the status of the lever (reverser) and a signal indicating the status of the master controller (master controller). The lever is provided to control the traveling direction of the electric vehicle. When the lever is in the on state, the electric vehicle can be powered and moved forward or backward. When the lever lever is in the neutral state, the electric vehicle is stopped or coasting.

  The master controller is provided to control the speed of the electric vehicle. When the master controller is on, the electric vehicle can be powered or regenerated. When the master controller is in the neutral state, the electric vehicle is stopped or coasting.

  FIG. 2 is a time chart showing an example of the control operation of the control unit 110.

  In FIG. 2, the horizontal axis is the elapsed time, and examples of the opening / closing timings of the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80 are shown. Yes.

  In FIG. 2, first, the control unit 110 connects the first circuit breaker 60. Next, based on the control state signal CNT, at a time (t2) when a predetermined time elapses from the time (t1) when the lever is in the on state and the master controller is in the on state, the control unit 110 performs the second cutoff. The vessel 70 is closed. In this case, the current value Im obtained from the current detector 100 indicates the current flowing through the first circuit breaker 60 and the second circuit breaker 70.

  Next, the control part 110 closes the 3rd circuit breaker 80 at the time (t4) when predetermined time passed from the time (t3) when the capacitor voltage Vo detected by the voltage detector 50 became threshold voltage Vth. The current value Im after the third circuit breaker 80 is closed indicates the current flowing through the first circuit breaker 60 and the third circuit breaker 80.

  Next, the control part 110 opens the 2nd circuit breaker 70 at the time (t5) when predetermined time passed from the time (t4) when the 3rd circuit breaker 80 was closed. A in FIG. 2 shows a case where the second circuit breaker 70 is opened while the third circuit breaker 80 is closed. Since the third circuit breaker 80 is in a closed state, when the second circuit breaker 70 is opened, the current flowing through the second circuit breaker 70 is substantially zero.

  Next, at a time (t7) when a predetermined time has elapsed from the time (t6) when the capacitor voltage Vo reaches the overhead wire voltage, the control unit 110 performs switching to the power conversion unit 20 in order to generate predetermined AC power. A gate command for ON / OFF control of the element is output. As a result, power conversion in the power conversion unit 20 is started.

  Each of the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80 includes a control unit when a current exceeding the rated current flows, or when an abnormality of the control unit 110 or a speed sensor (not shown) is detected. Shut off according to 110 control. For example, in the period (t2 to t4) during which the capacitor 40 is charged, when a current exceeding the rated current flows due to a short circuit accident or the like, the second circuit breaker 70 is interrupted. During the period of switching the connection from the second circuit breaker 70 to the third circuit breaker 80 (t4 to t5), since the second circuit breaker 70 and the third circuit breaker 80 are connected, when a current exceeding the rated current flows, After the 3rd circuit breaker 80 is interrupted | blocked, the 2nd circuit breaker 70 is interrupted | blocked. When a current exceeding the rated current flows during a period after t5, the third circuit breaker 80 is interrupted. In any case, when a current exceeding the breaking capacity of the connected breaker in the second breaker 70 and the third breaker 80 flows, the first breaker 60 is also broken.

  Further, the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80 may be interrupted according to the operation control of the control unit 110. For example, the second circuit breaker 70 is interrupted at time t5 when the power supply is started. Moreover, when the pantograph 30 leaves | separates from an overhead wire, the 1st circuit breaker 60, the 2nd circuit breaker 70, and the 3rd circuit breaker 80 are interrupted | blocked. In any case, the current value Im detects the current that flows when the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80 are disconnected.

  B in FIG. 2 is a current that is greater than or equal to the rated current of the third circuit breaker 80 and less than the breaking capacity of the third circuit breaker 80, and the third circuit breaker 80 is opened while the first circuit breaker 60 is closed. Shows the case. In this case, the control part 110 stops the output of the gate command with respect to the electric power conversion part 20 with opening the 3rd circuit breaker 80. FIG.

  Then, the state determination of the circuit breaker (the 1st circuit breaker 60, the 2nd circuit breaker 70, or the 3rd circuit breaker 80) is demonstrated.

  The determination unit 120 in FIG. 1 includes a storage unit 121 and a current calculation unit 122. The storage unit 121 stores the current value Im output from the current detector 100 via the input / output unit 101 together with time information. The storage unit 121 stores signals S61, S71, and S81 output from the auxiliary contacts 61, 71, and 81 via the input / output unit 101, together with time information.

  The current calculation unit 122 uses the information stored in the storage unit 121 to calculate the integrated value of the current flowing through each of the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80. In addition, the current calculation unit 122 acquires the value of the current that flows when each of the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80 is opened using information stored in the storage unit 121. .

  The determination unit 120 acquires (calculates) an evaluation value based on the circuit breaker operation count using the information stored in the storage unit 121 and the information acquired by the current calculation unit 122. Here, the number of operations means, for example, the number of times that the circuit breaker has shifted from the closed state to the opened state. Based on the signals S61, S71, and S81 stored in the storage unit 121, the determination unit 120 acquires the operation time point and the number of times each circuit breaker is in the open state from the closed state.

  An evaluation value means the value which shows the deterioration state of a circuit breaker. The evaluation value is expressed by, for example, an arithmetic expression based on the number of circuit breaker operations. The first evaluation value and the second evaluation value as evaluation values will be described later. Moreover, the determination part 120 determines the state of a circuit breaker using these evaluation values.

  The changing unit 130 changes any one of the coefficient and threshold used in the state determination. For example, when the circuit breaker is replaced, it is changed according to the material, capacity, type, etc. of the circuit breaker. Thereby, the determination part 120 can obtain the evaluation value which shows the deterioration state of a circuit breaker, also when a deterioration state changes according to the material, capacity | capacitance, type | mold, etc. of a circuit breaker. The display unit 140 displays the determination result of the determination unit 120.

  Next, the first evaluation value acquired by the determination unit 120 will be described in detail with reference to FIG. The first evaluation value is a value obtained by adding a coefficient corresponding to the integrated value of the current flowing through the circuit breaker until the circuit breaker operates based on the operation.

  FIG. 3 is a diagram illustrating an example of a coefficient based on the integrated value of the current flowing through the circuit breaker. The horizontal axis in FIG. 3 indicates the integrated value of the current flowing through the circuit breaker since the use of the circuit breaker was started. The vertical axis in FIG. 3 indicates the coefficient kn (n is a natural number) obtained for the current integrated value. As the integrated value of the current increases, the value of the coefficient kn tends to increase. This is considered to be because the greater the integrated value of the current, the greater the degree of deterioration of the circuit breaker with respect to the force applied by the mechanical operation of the circuit breaker.

  The relationship between the integrated value and the coefficient is stored in the storage unit 121 as a table, for example. The coefficient kn corresponding to the integrated current value may be changed according to the material, capacity, type, etc. of the circuit breaker. For example, the value of the coefficient kn may be reduced as the breaking capacity of the breaker increases.

  The current calculation unit 122 acquires the open / closed state of each of the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80 using the information stored in the storage unit 121. When the first circuit breaker 60 and the second circuit breaker 70 are closed and the third circuit breaker 80 is opened, the current calculation unit 122 calculates the current value Im as an integrated value of the current flowing through the first circuit breaker 60. I60 and the integrated value I70 of the current flowing through the second circuit breaker 70 are integrated.

  Further, when the first circuit breaker 60 and the third circuit breaker 80 are closed, the current calculation unit 121 sets the current value Im to the integrated value I60 of the current flowing through the first circuit breaker 60 and the third circuit breaker 80. Is integrated into an integrated value I80 of the current flowing through Since the current value Im is acquired together with the time information, the current calculation unit 121 can obtain the integrated values I60, I70, and I80 [A] in time series.

The determination unit 120 acquires information at the time when each of the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80 operates using information stored in the storage unit 121. Thereby, the determination part 120 acquires the coefficient kn corresponding to the integrated value of the current at the operation time of the circuit breaker, for example.
Next, the determination unit 120 obtains the first evaluation value by multiplying and adding the operation number Nan (n is a natural number) corresponding to the coefficient kn (n is a natural number) obtained from the integrated value. Here, the first evaluation value of the first circuit breaker 60 is H60, the first evaluation value of the second circuit breaker 70 is H70, and the first evaluation value of the third circuit breaker 80 is H80. Even when no current flows through the circuit breaker (the first circuit breaker 60, the second circuit breaker 70, or the third circuit breaker 80), the circuit breaker (the first circuit breaker 60, the second circuit breaker 70, or the third circuit breaker). The circuit breaker 80) may repeat the opening / closing operation. For this reason, the value of the coefficient kn does not change, but the number of operations Nan may take a value of 1 or more.

  Thereby, for example, the first evaluation value of the first circuit breaker 60 is calculated as H60 = (k1 * Na1 + k2 * Na2 +... + Kn * Nan) (n is a natural number). Similarly, the first evaluation value H70 of the second circuit breaker 70 and the first evaluation value H80 of the third circuit breaker 80 are also calculated. Each of the first evaluation values H60, H70, and H80 increases as the circuit breaker usage time elapses. This is because the integrated value of the circuit breaker current and the number of operations increase as the circuit breaker usage time elapses.

  Next, the second evaluation value acquired by the determination unit 120 will be described in detail with reference to FIG. A 2nd evaluation value is the value which added the coefficient according to the value of the electric current which flowed into the circuit breaker when the circuit breaker was opened.

  FIG. 4 is a diagram illustrating an example of a coefficient based on a current value flowing through the circuit breaker when the circuit breaker is opened. The coefficient kn (n is a natural number) shown in FIG. 3 continuously increases monotonously according to the integrated value of the current, whereas the coefficient coefficient cn (n is a natural number) shown in FIG. It increases monotonically step by step.

  This is considered to be because the deterioration of the circuit breaker progresses in stages with respect to the force applied by the mechanical operation of the circuit breaker as the value of the current flowing at the time of circuit breakage increases. The relationship between the current value flowing through the circuit breaker and the coefficient is stored in the storage unit 121 as a table, for example. The coefficient cn corresponding to the current value may be changed according to the material, capacity, type, etc. of the circuit breaker. For example, the coefficient value cn may be reduced as the breaking capacity of the breaker increases.

  Next, the determination unit 120 acquires current values Ic60, Ic70, and Ic80 that flow when the first circuit breaker 60, the second circuit breaker 70, and the third circuit breaker 80 are opened using the current calculation unit 122. To do. Here, the current flowing when opened means the current flowing in the circuit breaker immediately before being opened. Moreover, the determination part 120 acquires the coefficient cn (n is a natural number) corresponding to the value of the electric current when a circuit breaker is opened, for example, as shown by the dotted line in FIG. The coefficient c1 = 1.1 if the value of the current flowing when opened is 0 to 500 [A], and the coefficient c2 = if the value of the current flowing when opened is 500 to 1000 [A]. 1.3. Similarly, if the value of the current flowing when opened is 1000 to 1500 [A], c3 = 1.5, and if the value of the current flowing when shutting off is 1500 to 2000 [A]. c4 = 2.0.

  Next, the determination unit 120 obtains the second evaluation value by multiplying and adding the interruption number Nbn (n is a natural number) corresponding to the coefficient cn (n is a natural number). The second evaluation value of the first circuit breaker 60 is Hc60, the second evaluation value of the second circuit breaker 70 is Hc70, and the second evaluation value of the third circuit breaker 80 is Hc80. For example, the second evaluation value of the first circuit breaker 60 is calculated as Hc60 = (c1 * Nb1 + c2 * Nb2 + c3 * Nb3 + c4 * Nb4). The number of interruptions Nbn (n is a natural number) may include the number of interruptions when no current flows through the circuit breaker. Similarly, the second evaluation value Hc70 of the second circuit breaker 70 and the second evaluation value Hc80 of the third circuit breaker 80 are also calculated. Each of 2nd evaluation value Hc60, Hc70, and Hc80 increases with progress of the use time of a circuit breaker. This is because the number of breaks increases as the breaker usage time elapses.

  The determination process of the determination unit 120 will be described in detail. First, the determination process using the first evaluation value will be described. FIG. 5 is a diagram illustrating an example of a relationship between the first evaluation value and the threshold value T1 in the determination unit 120. The horizontal axis in FIG. 5 indicates the elapsed time, and the horizontal axis indicates the value of the first evaluation value. As illustrated in FIG. 5, the determination unit 120 determines that the circuit breaker has deteriorated when the first evaluation value exceeds a predetermined threshold value T1. Further, when the first evaluation value exceeds a predetermined threshold value T1, it may be determined as a failure sign state in which a failure occurs in the circuit breaker.

  Thereby, for example, when H60> T1, which is the first evaluation value of the first circuit breaker 60, the determination unit 120 causes the display unit 140 to display an alarm based on the determination result. Similarly, when each of Hc70 and Hc80 exceeds the threshold value T1, the determination unit 120 causes the display unit 140 to display an alarm based on the determination result. Moreover, you may change threshold value T1 according to the material, capacity | capacitance, type | mold, etc. of a circuit breaker.

  Next, the determination process using the second evaluation value will be described. FIG. 6 is a diagram illustrating an example of a relationship between the second evaluation value and the threshold value T2 in the determination unit 120. The horizontal axis in FIG. 6 indicates the elapsed time, and the vertical axis indicates the value of the second evaluation value. As illustrated in FIG. 6, the determination unit 120 determines that the circuit breaker has deteriorated when the second evaluation value exceeds a predetermined threshold value T2. Further, when the second evaluation value exceeds a predetermined threshold value T2, it may be determined as a failure sign state in which a failure occurs in the circuit breaker.

  Thereby, for example, when Hc60> T2, which is the second evaluation value of the first circuit breaker 60, the determination unit 120 causes the display unit 140 to display an alarm based on the determination result. Similarly, when each of Hc70 and Hc80 exceeds the threshold value T2, the determination unit 120 causes the display unit 140 to display an alarm based on the determination result. Moreover, you may change threshold value T2 according to the material, capacity | capacitance, type | mold, etc. of a circuit breaker. Thus, the determination part 120 can determine the deterioration state of a circuit breaker using two types of evaluation values. For example, it is possible to issue an alarm when any evaluation value exceeds a threshold value.

  The determination unit 120 may be configured to obtain a coefficient based on the current effective value of the current flowing through the circuit breaker. By using the effective current value, it is possible to perform the circuit breaker determination process even when the power acquired from the current collector 30 is alternating current.

  As described above, according to one embodiment, it is possible to determine the deterioration state of the circuit breaker due to the mechanical operation of the circuit breaker.

  Although one embodiment has been described above, this embodiment has been presented only as an example, and is not intended to limit the scope of the invention. The novel apparatus described herein can be implemented in various other forms. Various omissions, substitutions, and changes can be made to the form of the apparatus described in the present specification without departing from the gist of the invention. The appended claims and their equivalents are intended to include such forms and modifications as fall within the scope and spirit of the invention.

  DESCRIPTION OF SYMBOLS 1 Control apparatus for vehicles, 10 Electric motor, 20 Electric power conversion part, 30 Current collection part, 40 Capacitor, 50 Voltage detector, 60 1st circuit breaker, 70 2nd circuit breaker, 80 3rd circuit breaker, 90 Resistor, 100 Current detector, 110 control unit, 120 determination unit, 130 changing unit, 140 display unit

Claims (7)

A converter that converts the electric power obtained through the current collector into electric power of an electric vehicle motor;
A circuit breaker provided between the current collector and the converter;
A first evaluation value obtained by adding a coefficient corresponding to an integrated value of the current flowing through the circuit breaker until the circuit breaker is operated based on the operation is obtained, and the first evaluation value is determined in advance. A determination unit that determines that the circuit breaker has deteriorated when exceeding
A vehicle control device comprising:   The determination unit obtains a second evaluation value obtained by adding a coefficient according to a value of a current flowing through the circuit breaker when the circuit breaker is opened, and the second evaluation value is determined in advance. The power conversion device according to claim 1, wherein when the threshold value is exceeded, the circuit breaker is determined to be in a deteriorated state.   The vehicle control device according to claim 1, wherein the coefficient is obtained based on a current effective value of a current flowing through the circuit breaker.   The power conversion device according to claim 1, wherein the coefficient increases as the integrated value increases.   The vehicle control device according to claim 2, wherein the coefficient increases stepwise as the value of a current flowing through the circuit breaker increases when the circuit breaker is interrupted. The circuit breaker is one of a first circuit breaker, a second circuit breaker, and a third circuit breaker, and one end of the first circuit breaker is connected to the current collector, and the second circuit breaker One end of the first circuit breaker is connected to the other end of the first circuit breaker, a resistor connected in series to the other end of the second circuit breaker is connected to the converter, and one end of the third circuit breaker is connected to the first circuit breaker. And the other end of the third circuit breaker is connected to the converter,
6. The control unit according to claim 1, further comprising a control unit that connects the second circuit breaker after connecting the first circuit breaker and connects the third circuit breaker after connecting the second circuit breaker. Vehicle control device.   The circuit breaker capacity of the first circuit breaker is larger than the circuit breaker capacity of the third circuit breaker, and the circuit breaker capacity of the third circuit breaker is larger than the circuit breaker capacity of the second circuit breaker. The vehicle control device according to claim 6, wherein the coefficient used in the evaluation value decreases as the breaking capacity increases.

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