JP2017034800A - Charge control device and power conversion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique which can short-circuit at an appropriate time a resistor for rush current suppression which is connected in series with a capacitor, irrespective of the ambient temperature of the resistor.SOLUTION: In the former stage of a capacitor 12 in a charge control device 5, a resistor 14 is connected in series. A contact element 15a is connected in parallel to the resistor 14. A control unit 19, when activated after power switched on, detects the ambient temperature of the resistor 14 by a temperature detection element 13 disposed in the vicinity of the resistor 14. From the detected ambient temperature, the control unit 19 calculates a latency time before outputting a contact point signal to short-circuit the contact element 15a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a charge control device that controls charging of a capacitor and a power conversion device provided with the charge control device.

  There is a power conversion device that converts AC power supplied from an AC power source into DC power, charges a capacitor with the DC power, converts the power charged in the capacitor into AC power, and outputs the AC power. In this type of power conversion device, the capacitor is not charged before DC power is supplied (that is, before the power conversion device is powered on). For this reason, when the supply of DC power is started and the initial charging of the capacitor is started, a large inrush current flows through the capacitor. If a large inrush current flows through the capacitor, the capacitor may be damaged. Therefore, in order to suppress such an inrush current, a resistor is connected in series before the capacitor.

  By the way, after the charging voltage of the capacitor has risen sufficiently, a resistor for suppressing inrush current is unnecessary. Therefore, after the charging voltage of the capacitor has risen sufficiently, this resistor is short-circuited by a contact element such as a relay to fully charge the capacitor.

  Patent Document 1 discloses an example of such a power conversion device. In the technique disclosed as the prior art of Patent Document 1, a timer timing operation is started at the moment of power-on of the power converter, and the contact element is short-circuited after a preset time.

  Here, when the contact element is short-circuited when the charging voltage of the capacitor is not sufficiently close to the DC voltage obtained by converting AC power (that is, when the charging voltage of the capacitor is not sufficiently raised), An excessive current corresponding to the difference between the DC voltage and the charging voltage of the capacitor may flow to the contact element, which may damage the contact element and the capacitor. Therefore, it is necessary to sufficiently increase the waiting time until the contact element is short-circuited so that the contact element is short-circuited after the charging voltage of the capacitor becomes equal to or higher than a specified value near the DC voltage.

JP-A-2-246778

  So far, fixed resistors such as cement resistors have been used as resistors for suppressing inrush current. However, if an open circuit failure occurs in the contact element that short-circuits the resistor and the resistor cannot be short-circuited, current will flow continuously through the resistor over a long period of time, causing the resistor to overheat and producing smoke. May lead to accidents. Therefore, in consideration of an open failure of the contact element, a PTC (Positive) in which a resistance value with respect to a temperature change is larger than a cement resistor as a resistor for suppressing an inrush current, and the resistance value rapidly increases at a high temperature. A temperature changing resistor such as a Temperature Coefficient (Thermistor) thermistor may be used.

  However, when a temperature change type resistor is used as a resistor for suppressing inrush current, a time constant that is a product of the resistance value of the resistor and the capacitance of the capacitor depends on the ambient temperature of the resistor. For this reason, the time required for the charging voltage of the capacitor to rise above a specified value depends on the ambient temperature of the resistor.

  As described above, in order to avoid damage to the contact element and the capacitor, the contact element must not be short-circuited before the charging voltage of the capacitor rises above a specified value. Therefore, when a temperature change type resistor is used as a resistor for suppressing inrush current, the waiting time until the contact element is short-circuited is the resistance of the resistor at the upper limit temperature of the allowable range of ambient temperature (for example, rated temperature). Was set based on the value.

  The waiting time set in this way is appropriate when the ambient temperature is a high temperature near the upper limit temperature of the allowable range. However, when the ambient temperature is low, such as near the lower limit temperature of the allowable range, the time constant determined by the resistance value of the resistor and the capacity of the capacitor is small, compared to when the ambient temperature is high. The capacitor charging voltage quickly rises above the specified value. Since the set waiting time is the same as when the ambient temperature is high, when the ambient temperature is low, the contact element is short-circuited even though the capacitor charging voltage has risen above the specified value. A period during which the charging of the capacitor is completed is unnecessarily long. Thus, when the ambient temperature is low, the waiting time until the contact element is short-circuited with respect to the time required for the capacitor charging voltage to rise above the specified value becomes inappropriate.

  The present invention has been made in view of the problems described above, and the resistor can be short-circuited at an appropriate time regardless of the ambient temperature of the resistor for suppressing inrush current connected in series with the capacitor. The aim is to provide possible technology.

  In order to solve the above-described problem, a charging control device of the present invention includes a capacitor to which direct current power is supplied, a resistor connected in series before the capacitor, a contact element connected in parallel to the resistor, A temperature detection unit that detects an ambient temperature of the resistor; and a control unit that calculates a waiting time until a contact signal for short-circuiting the contact element is output based on the ambient temperature detected by the temperature detection unit. Moreover, the power converter device containing such a charge control apparatus is provided.

  In the charge control device of the present invention, the ambient temperature of the resistor is detected, and the waiting time until the contact signal for short-circuiting the contact element is output is determined based on the detected ambient temperature. For this reason, even if the temperature change type resistor is used as the resistor and the ambient temperature of the resistor changes, the waiting time until the contact signal for short-circuiting the contact element is output becomes an appropriate time.

  Therefore, according to the charge control device of the present invention, the resistor can be short-circuited at an appropriate time regardless of the ambient temperature of the resistor for suppressing the inrush current connected in series with the capacitor.

It is a figure which shows the structural example of the power converter device 1 containing the charge control apparatus 5 which is 1st Embodiment of this invention. 6 is a time chart showing an example of a change in voltage Vdc across the capacitor 12 during initial charging of the capacitor 12 of the power conversion device 1; It is a flowchart which shows the flow of the process which the control part 19 of the power converter device 1 performs. 3 is a time chart showing an example of a change in voltage Vdc across a capacitor 12 when initial charging is started when the ambient temperature of the resistor 14 of the power conversion device 1 is higher than that in the example of FIG. 2. It is a flowchart which shows the flow of the process which the control part 19 of the power converter device of 2nd Embodiment of this invention performs.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(A: 1st Embodiment)
FIG. 1 is a diagram illustrating a configuration example of a power conversion device 1 including a charge control device 5 according to a first embodiment of the present invention. The charging control device 5 includes a capacitor 12, a resistor 14, a relay 15, a temperature detection element 13, an A / D (analog / digital) converter 18, a control unit 19, and a DC / DC (direct current / direct current) converter 20. Yes. In addition to the charging control device 5, the power conversion device 1 includes a converter unit 11 that supplies DC power to the charging control device 5 and an inverter unit (not shown) that is fed from a capacitor 12 of the charging control device 5. Yes.

  The converter unit 11 is a three-phase bridge connected diode, and three-phase full-wave rectification is performed on AC power input from the AC power supply 40. The converter 11 outputs the DC power obtained by the three-phase full-wave rectification between the high potential side DC bus 11P and the low potential side DC bus 11N.

  The capacitor 12 is connected between the DC buses 11P and 11N, and smoothes the DC power that is the output of the converter unit 11. The capacitor 12 is, for example, an electrolytic capacitor. An inverter unit that converts DC power smoothed by the capacitor 12 into AC power having a desired frequency is provided at the subsequent stage of the capacitor 12. A load (not shown) such as a motor driven by the power conversion device 1 is connected to the subsequent stage of the inverter unit.

  A resistor 14 for suppressing inrush current is connected in series before the capacitor 12. More specifically, the resistor 14 is inserted in the DC bus 11P on the high potential side between the converter unit 11 and the capacitor 12. The resistor 14 is a temperature change type resistor such as a PTC thermistor. A contact element 15a of a relay 15 for short-circuiting the resistor 14 after the charging voltage of the capacitor 12 has sufficiently risen is connected to the resistor 14 in parallel. The contact element 15a opens (opens) when no current flows through the electromagnet (not shown) of the relay 15, and when the current flows through the electromagnet of the relay 15, the contact element 15a is short-circuited (closed). To do. The resistor 14 and the relay 15 function as a charging circuit 16 that charges the capacitor 12.

  The temperature detection element 13 is an element for detecting the ambient temperature of the resistor 14. Specifically, the temperature detection element 13 is a temperature sensitive resistor such as a thermistor whose resistance value changes greatly with respect to changes in ambient temperature. The temperature detection element 13 is disposed in the vicinity of the resistor 14 and is exposed to substantially the same temperature environment as the resistor 14. For example, a current is supplied to the temperature detection element 13 from a constant current source (not shown). When a current flows through the temperature detection element 13, the voltage across the temperature detection element 13 is output to the A / D converter 18. Since the resistance value of the temperature detection element 13 varies depending on the ambient temperature, the voltage at both ends of the temperature detection element 13 reflects the ambient temperature of the temperature detection element 13.

  The A / D converter 18 is a circuit that converts an input analog signal into a digital signal and outputs the digital signal. The A / D converter 18 receives a current having the same value as the current supplied to the temperature detection element 13 (hereinafter referred to as a current of the temperature detection element 13) and a voltage across the temperature detection element 13. The A / D converter 18 samples the input voltage and current of the temperature detection element 13 in the analog signal format at the time instructed by the control unit 19 and converts them into digital signal format voltage and current. Then, the A / D converter 18 outputs the voltage and current of the temperature detection element 13 in the digital signal format at the time of sampling to the control unit 19. The output signal of the A / D converter 18 reflects the ambient temperature of the temperature detection element 13 at the time of sampling. Therefore, the temperature detection element 13 and the A / D converter 18 are temperature detection means for detecting the ambient temperature of the resistor 14 at the time instructed by the control unit 19.

  A DC / DC converter 20 is connected to the capacitor 12 in parallel. The DC / DC converter 20 is a circuit that converts the voltage across the capacitor 12 into a predetermined control voltage. The output of the DC / DC converter 20 is supplied to each part of the power conversion device 1 such as a constant current source that supplies current to the control unit 19, the A / D converter 18, and the temperature detection element 13. For this reason, the DC / DC converter 20 functions as a control power source for these components to operate. In FIG. 1, only the supply path to the control unit 19 for the output of the DC / DC converter 20 is illustrated, and the display of the supply path to the other members is omitted.

  The control unit 19 is, for example, a CPU (central processing unit) that executes each process according to a program stored in a storage unit (not shown). The control unit 19 calculates a voltage command signal based on a frequency command value from a frequency setter (not shown), and performs on / off control of switching elements constituting the inverter unit based on the voltage command signal. A PWM signal is generated.

  Further, the control unit 19 outputs a contact signal for opening / closing the contact element 15a to the relay 15 (more precisely, the electromagnet of the relay 15 for opening / closing the contact element 15a). The control unit 19 adjusts the timing for outputting the contact signal according to the signal acquired from the A / D converter 18. The processing performed by the control unit 19 will be described in detail later.

The storage unit includes a temperature resistance value conversion table for the temperature detection element 13 for converting the resistance value of the temperature detection element 13 into the ambient temperature of the temperature detection element 13, and the ambient temperature of the resistor 14 as the resistance value of the resistor 14. A temperature resistance value conversion table for the resistor 14 to be converted is stored. Further, the capacity of the capacitor 12 is stored in advance in the storage unit.
The above is the configuration of the power conversion device 1 including the charge control device 5.

  Before the power conversion device 1 is turned on, the capacitor 12 is not charged. When the power conversion device 1 is turned on from this state, the capacitor 12 is initially charged. The operation of the power conversion device 1 will be described focusing on the initial charging of the capacitor 12. FIG. 2 is a time chart showing an example of a change in the voltage Vdc across the capacitor 12 during the initial charging of the capacitor 12.

  When power is turned on and AC power is supplied at time t 0, power converter 1 rectifies the AC power by converter unit 11 and supplies the rectified DC power to charging circuit 16 to perform initial charging of capacitor 12. Start. At this time, since the contact element 15 a is open, a current that is suppressed through the resistor 14 flows through the capacitor 12. Then, the voltage Vdc across the capacitor 12 increases according to the time determined by the time constant of the resistor 14 and the capacitor 12.

  Here, it is assumed that the ambient temperature of the resistor 14 at the start of initial charging is, for example, about 10 degrees. In this case, since the resistance value of the resistor 14 is a value according to the ambient temperature, the time constant is also a value according to the ambient temperature, and the charging time of the capacitor is also a time according to the ambient temperature.

  After the power is turned on, when the voltage of the capacitor 12 reaches a predetermined level (for example, the voltage Vdc1), the DC / DC converter 20 starts supplying a predetermined level of control voltage to each unit. Thereby, the control part 19, the A / D converter 18, a constant current source, etc. start. The control unit 19 activated by being supplied with a control voltage from the DC / DC converter 20 starts executing a predetermined program. FIG. 3 is a flowchart showing a flow of processing executed by the control unit 19.

  When starting the execution of the program, the control unit 19 first acquires the ambient temperature of the resistor 14 (step SA110). More specifically, the control unit 19 first instructs the A / D converter 18 to perform sampling. When acquiring the sampling instruction, the A / D converter 18 samples the voltage and current of the temperature detecting element 13 at that time and outputs the sampled voltage and current to the control unit 19. Thereby, the control unit 19 acquires the sampling result from the A / D converter 18. Next, when acquiring the sampling result, the control unit 19 calculates the resistance value of the temperature detection element 13 from the voltage and current of the temperature detection element 13 at the time of sampling. Next, the control unit 19 refers to the temperature resistance value conversion table for the temperature detection element 13 and converts the calculated resistance value of the temperature detection element 13 into the ambient temperature of the temperature detection element 13. The control unit 19 acquires the ambient temperature of the temperature detection element 13 thus obtained as the ambient temperature of the resistor 14. This is because it is estimated that the ambient temperature of the resistor 14 and the ambient temperature of the temperature detection element 13 are substantially the same by arranging the temperature detection element 13 in the vicinity of the resistor 14.

  After acquiring the ambient temperature of the resistor 14, the control unit 19 refers to the temperature resistance value conversion table for the resistor 14 and converts the ambient temperature into the resistance value of the resistor 14 (step SA120).

  Next, the control unit 19 calculates a waiting time until a contact signal for short-circuiting the contact element 15a is output from the obtained resistance value of the resistor 14 and the capacity of the capacitor 12 stored in advance in the storage unit. (Step SA130). More specifically, the control unit 19 first calculates a time constant from the resistance value of the resistor 14 and the capacitance of the capacitor 12. Next, using the voltage Vdc1 of the capacitor 12 when the DC / DC converter 20 starts to supply the control voltage and the calculated time constant, the control unit 19 starts up from the start of charging the capacitor 12. Then, the time t11 required to obtain the ambient temperature is calculated. Next, using the calculated time constant, the control unit 19 calculates a time t13 required from the start of charging the capacitor 12 until the voltage Vdc of the capacitor 12 reaches a predetermined voltage Vdc3 (specified value). The voltage Vdc3 is a voltage representing a threshold value as to whether or not the charging voltage of the capacitor 12 has risen sufficiently. And the control part 19 makes time td12 obtained by subtracting time t11 from time t13 the waiting time until it outputs a contact signal from the present time (processing time of step SA130). In this way, a series of processes until the waiting time is calculated ends.

  As the calculation of the waiting time ends, the control unit 19 sets the timer setting value to a value corresponding to the calculated waiting time, and starts measuring the timer.

At the time when the timer counts the previously set time (that is, time t3 when the voltage Vdc of the capacitor 12 in FIG. Output to electromagnet. When a current flows through the electromagnet of the relay 15 by this contact signal, the electromagnet of the relay 15 shorts the contact element 15a. When the contact element 15a is short-circuited, the capacitor 12 is fully charged.
The above is an example of operation | movement of the power converter device 1 at the time of initial stage charge.

  FIG. 4 is a time chart showing an example of a change in the voltage Vdc across the capacitor 12 when the initial charging is started when the ambient temperature of the resistor 14 is higher (for example, about 40 degrees) than that in the example of FIG. It is a chart. As in the previous example, the control unit 19 obtains the ambient temperature of the resistor 14 (step SA110), and calculates the resistance value of the resistor 14 (step SA120). For this reason, even if the ambient temperature of the resistor 14 is higher than that of the example of FIG. 2 at the start of initial charging, the control unit 19 has a resistance value of the resistor 14 that is larger than that of the example of FIG. Is calculated with an appropriate value.

  The control unit 19 calculates a time constant larger than that of the example of FIG. 2 from the resistance value of the resistor 14 and the capacitance of the capacitor 12 calculated with a larger value than the example of FIG. 2, and outputs a contact signal. Is calculated (step SA130). More specifically, using a larger time constant than the example of FIG. 2, the control unit 19 has a time t31 required from the start of charging the capacitor 12 until the control unit 19 is activated to acquire the ambient temperature, Each time t33 required from the start of charging the capacitor 12 until the capacitor voltage Vdc reaches the voltage Vdc3 (specified value) is calculated. And the control part 19 makes time td32 obtained by subtracting time t31 from time t33 the waiting time until a contact signal is output. As apparent from a comparison between FIG. 4 and FIG. 2, the time td32 is longer than the time td12, and the control unit 19 causes the voltage of the capacitor to reach the voltage Vdc3 (specified value) as in the example of FIG. The contact signal is output at the time (ie, time t23 in FIG. 4).

  As described above, in the power conversion device 1 including the charging control device 5 according to the present embodiment, the waiting time until the ambient temperature of the resistor 14 is detected and acquired and the contact signal for short-circuiting the contact element 15a is output. This is determined based on the acquired ambient temperature of the resistor 14. For this reason, a temperature change type resistor is used as the resistor 14 to output a contact signal even if the time required until the charging voltage of the capacitor 12 rises to a specified value or more changes depending on the ambient temperature of the resistor. The waiting time to do is an appropriate time. Therefore, according to the power conversion device 1 including the charging control device 5, the resistor 14 is short-circuited at an appropriate time regardless of the ambient temperature of the inrush current suppression resistor 14 connected in series to the capacitor 12. Can do.

  As a result, when the capacitor 12 is charged in a high temperature environment where the time required for the charge voltage of the capacitor 12 to rise above the specified value is long, the resistance is increased before the charge voltage of the capacitor 12 rises above the specified value. It is possible to prevent the contact element and the capacitor 12 from being damaged by short-circuiting the device. Further, when the capacitor 12 is charged in a low temperature environment where the time required for the charging voltage of the capacitor 12 to rise above the specified value is short, even after the charging voltage of the capacitor 12 rises above the specified value. It is possible to prevent a situation in which a period in which the resistor is not short-circuited and a time required for completing the charging of the capacitor 12 is unnecessarily long.

  In the present embodiment, the control unit 19 converts the ambient temperature of the resistor 14 into the resistance value of the resistor 14 and then waits from the resistance value of the resistor 14 and the capacity of the capacitor 12 stored in advance. Time is calculated. For this reason, even if there is variation in the capacitance of the capacitor 12 for each capacitor 12, it can be easily optimized individually by changing the setting of the capacitance of the capacitor 12 stored in advance.

(B: Second embodiment)
The structure of the power converter device which is 2nd Embodiment of this invention is the same as that of the power converter device 1 of 1st Embodiment. In the power conversion device of this embodiment, the processing performed by the control unit 19 is different from that of the first embodiment. FIG. 5 is a flowchart showing the flow of processing performed by the control unit 19 of the power conversion device of this embodiment. As shown in FIG. 5, the control unit 19 of the present embodiment determines whether or not the acquired ambient temperature has exceeded a preset threshold value following the process of acquiring the ambient temperature of the resistor 14 (step SA110). Is different from the control unit 19 of the first embodiment in that the process of determining (step SB110) is performed. The threshold value in step SB110 is set to, for example, an upper limit value (for example, 50 degrees) of the rated temperature of the power conversion device.

  When the acquired ambient temperature does not exceed the preset threshold value (step SB110: No), the control unit 19 of the present embodiment calculates the resistance value of the resistor 14 as in the first embodiment (step SB110). SA120), a waiting time is calculated (step SA130). On the other hand, when the acquired ambient temperature exceeds a preset threshold value (step SB110: Yes), the control unit 19 of the present embodiment determines an alarm indicating an abnormality by determining that the contact element 15a is open. After output (step SB120), step SA120 and subsequent steps are performed. Specifically, the control unit 19 may turn on the abnormality indicator lamp according to this alarm, or may emit an alarm sound from a buzzer or the like.

  As described above, in the power conversion device of the present embodiment, it is possible to confirm whether or not the ambient temperature of the resistor 14 is normal before the charging of the capacitor 12 is completed. That is, according to the power converter of this embodiment, it is possible to know the abnormality of the power converter before operating the inverter unit.

  Further, when the acquired ambient temperature exceeds a preset threshold value (step SB110), the control unit 19 may give a restriction such that the inverter unit subsequent to the capacitor 12 is not operated. .

  In addition, an upper limit value of the rated temperature (for example, 50 degrees) is set as an upper limit threshold value, and an alarm indicating a high temperature abnormality is output when the acquired ambient temperature exceeds the upper limit threshold value, and a lower limit value of the rated temperature (for example, -10 degrees) May be output as an alarm indicating a low temperature abnormality when the acquired ambient temperature falls below the lower threshold.

(C: deformation)
Although the first and second embodiments of the present invention have been described above, it goes without saying that the following modifications may be added to these embodiments.

(1) In 1st and 2nd embodiment, after converting the alternating current power supplied to the power converter device 1 into direct-current power in the converter part 11, the direct current power is supplied to the charge control apparatus 5 in the power converter device 1. It was. However, the converter 11 may not be provided in the power conversion device, and the charge control device 5 of the power conversion device may be connected to a DC power source. In the first and second embodiments, the power conversion device 1 is provided with the charge control device 5. However, the charge control device may be provided in a device other than the power conversion device (for example, a device that does not include a process of converting power).

(2) The control unit 19 of the power conversion device 1 of the first and second embodiments converts the acquired ambient temperature of the resistor 14 into the resistance value of the resistor 14, and the resistance value of the resistor 14 and the capacitor 12. The waiting time until the contact signal for short-circuiting the contact element 15a is output from the above capacity. However, the control unit 19 may directly calculate the waiting time based on the acquired ambient temperature of the resistor 14 without converting the acquired ambient temperature of the resistor 14 into the resistance value of the resistor 14. That is, the control unit 19 may perform step SA130 subsequent to step SA110 without performing step SA120 in FIG. This can be realized, for example, by storing in advance information that associates the ambient temperature of the resistor 14 with a time constant.

(3) In the power conversion device 1 of the first embodiment, the temperature resistance value conversion tables for the temperature detection element 13 and the resistor 14 are stored in advance. However, information that associates the ambient temperature with the resistance value may be stored in advance, and is not limited to each temperature resistance value conversion table for the temperature detection element 13 and the resistor 14. For example, a function that associates the ambient temperature with the resistance value is stored in advance, and the control unit 19 may perform calculation according to the function.

(4) In order to detect the ambient temperature of the resistor 14 with high sensitivity, the temperature detection element 13 is preferably a resistor that has a larger change rate of the resistance value with respect to the change in the ambient temperature than the resistor 14. However, the relationship between the temperature characteristic of the resistance value in the temperature detection element 13 and the temperature characteristic of the resistance value in the resistor 14 is not limited to this.

  DESCRIPTION OF SYMBOLS 1 ... Power converter device, 5 ... Charge control apparatus, 11 ... Converter part, 11P, 11N ... DC bus, 12 ... Capacitor, 13 ... Temperature detection element, 14 ... Resistor, 15 ... Relay, 15a ... Contact element, 16 ... Charging circuit, 18 ... A / D converter, 19 ... control unit, 20 ... DC / DC converter, 40 ... AC power supply.

Claims (7)

A capacitor to which DC power is supplied;
A resistor connected in series before the capacitor;
A contact element connected in parallel to the resistor;
Temperature detecting means for detecting the ambient temperature of the resistor;
A control unit that calculates a waiting time until the contact signal for short-circuiting the contact element is output based on the ambient temperature detected by the temperature detection unit;
A charge control device comprising: The charge control device according to claim 1, wherein the control unit calculates the waiting time from a resistance value of the resistor and a capacitance of the capacitor at an ambient temperature detected by the temperature detection unit. Information relating the ambient temperature of the resistor and the resistance value of the resistor is stored in advance,
The charging control device according to claim 2, wherein the control unit calculates a resistance value of the resistor according to the information. The temperature detecting means includes a temperature sensitive resistor having a large change in resistance value with respect to a change in ambient temperature,
The charge control device according to any one of claims 1 to 3, wherein the temperature sensitive resistor is disposed in the vicinity of the resistor. The control unit detects the ambient temperature of the resistor by the temperature detecting means when the supply of DC power to the capacitor is started and the voltage of the capacitor reaches a predetermined level. The charge control device according to any one of claims 1 to 4. 6. The charging according to claim 1, wherein the control unit determines whether or not an ambient temperature detected by the temperature detection unit exceeds a threshold value, and notifies an abnormality when the threshold value is exceeded. Control device. Including the charge control device according to any one of claims 1 to 6,
A power conversion device that converts and outputs electric power charged in the capacitor of the charge control device.

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