JP2012200781A - Charge control method for electrostatic energy storage welding power source and electrostatic energy storage welding power source - Google Patents

Charge control method for electrostatic energy storage welding power source and electrostatic energy storage welding power source Download PDF

Info

Publication number
JP2012200781A
JP2012200781A JP2011069724A JP2011069724A JP2012200781A JP 2012200781 A JP2012200781 A JP 2012200781A JP 2011069724 A JP2011069724 A JP 2011069724A JP 2011069724 A JP2011069724 A JP 2011069724A JP 2012200781 A JP2012200781 A JP 2012200781A
Authority
JP
Japan
Prior art keywords
charging
charging voltage
target
voltage
target charging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2011069724A
Other languages
Japanese (ja)
Inventor
Takayuki Hirose
Kenichi Ishii
貴之 廣瀬
賢一 石井
Original Assignee
Nippon Avionics Co Ltd
日本アビオニクス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Avionics Co Ltd, 日本アビオニクス株式会社 filed Critical Nippon Avionics Co Ltd
Priority to JP2011069724A priority Critical patent/JP2012200781A/en
Publication of JP2012200781A publication Critical patent/JP2012200781A/en
Application status is Pending legal-status Critical

Links

Images

Abstract


PROBLEM TO BE SOLVED: To provide a charge control technique with good followability to a target charge voltage profile at high speed.
An operation amount is obtained by using a PID gain as a difference between an ideal target charging voltage profile and a charging voltage profile by PID control, and an input AC power source is phase-controlled in accordance with the operation amount to perform full-wave rectification. When the charging current is determined and charging is performed, the difference between the target voltage per control unit time when the charging current is low and the PID gain is adjusted according to the charging current maintaining the original shape of the sine wave The charging control technique is used, in which target charging voltage profile data obtained by adding a predetermined offset value to the above is used.
[Selection] Figure 2

Description

  The present invention relates to an electrostatic energy storage welding power source that discharges energy accumulated by charging a capacitor in a short time and flows a welding current to perform welding, and more particularly, a high-speed charging control method for a capacitor and a high-speed charging method. The present invention relates to an electrostatic energy storage type welding power source including a charge control means.

An electrostatic energy storage welding power source capable of supplying large welding energy in a short time is used for welding precision parts and the like.
This electrostatic accumulator welding power source rectifies a commercial AC power source with a mixed bridge full-wave rectifier circuit (hereinafter also simply referred to as a rectifier circuit) composed of two thyristors and two diodes, and a large-capacitance capacitor (hereinafter referred to as a “capacitor”). The energy is accumulated by charging the capacitor), and the accumulated energy is released in a short time (discharged from the capacitor), and a welding current is passed between the welding electrodes via the welding transformer. Weld.

  Feedback control is used for charging control of this capacitor, and the voltage actually charged in the capacitor (hereinafter referred to as feedback voltage) is compared with the target charging voltage (hereinafter also referred to as target voltage). Thus, the firing angle is determined according to the difference, the thyristor of the rectifier circuit is turned on / off, the charging current to the capacitor is controlled, and the charging is controlled to the target voltage (for example, Patent Document 1). ). Since the magnitude of this charging current is related to the charging speed, it is necessary to appropriately control the magnitude of the charging current in order to complete charging within a predetermined charging time.

  On the other hand, PID control is known as feedback control, and PID control is frequently used recently because control with good responsiveness can be performed by combining PID gains with appropriate values. Although it is not charging control, in the field of welding, it is used for welding current control, for example (for example, patent document 2).

  Using this PID control, the voltage actually charged in the capacitor during a predetermined charging time is compared with the detected feedback voltage and the target voltage, and the difference is obtained by multiplying each by the PID constant. The firing angle is determined according to the operation amount, and the thyristor of the rectifier circuit is turned on / off to control the charging current to the capacitor. At this time, in order to charge the target voltage without causing overshoot, ringing, or time delay within a predetermined time, the PID constant is appropriately determined.

JP 10-216957 A JP 2002-160071 A

Recently, due to a demand for improvement in productivity, a reduction in tact time in welding work (increase in the number of energizations per unit time) has been demanded, and the necessity of charging a capacitor at a high speed has been increasing.
For this purpose, it can be considered that the target voltage is simply charged by energizing the charging current once.
However, in order to increase the charging speed as described above, a large charging current must be flowed, so that a large charging current must be flowed at a time. For this reason, the inrush current becomes too large, and when the excessive current that was originally provided flows, it is detected as an abnormality, and the breaker, which is a protective component that shuts off the power supply, operates and eventually the charging current cannot flow. There is a problem.

  Therefore, by adopting the conventional method, the charging voltage of the capacitor is changed from the current charging voltage within the charging time shortened in accordance with the shortening of the takt time from the current charging voltage (which is 0 after discharging because of repeated charging / discharging). It is conceivable to increase the voltage linearly.

In this conventional method, in order to charge a predetermined charging voltage (target voltage) at a predetermined charging time, a target charging voltage profile is set and charging control is performed so as to follow this profile as described above. It is.
However, simply comparing the feedback voltage with the target voltage as in the past, and controlling the charging current to the capacitor by turning on / off the thyristor of the rectifier circuit based on the difference, follows the target charging voltage profile. There was a problem that it was not possible (see FIG. 6).

  That is, the first problem is poor followability when the target voltage is low. In this case, the target charge voltage profile itself has a small difference in target voltage for each sampling time, so that the operation amount is small. As a result, the time for turning on the thyristor of the rectifier circuit is shortened, so that the charging current increases only little by little and the rise is delayed.

  The second problem is poor followability when the target voltage is high. In this case, there is no problem when the charged voltage is lower than the voltage (effective value) of the input AC power supply. However, as the charged voltage increases and approaches the voltage (effective value) of the input AC power supply, the mixed bridge full-wave rectifier circuit is adopted. However, since the original shape of the sine wave is maintained, this effect is noticeable. As a result, even if the timing for turning on the thyristor is increased at the same rate, the charging current does not increase at the same rate, so the rise in the charging voltage is reduced.

  The present invention has been made in view of such problems, and is an electrostatic energy storage system that adjusts the difference between the PID gain, the feedback voltage, and the target voltage at a high speed and has good followability to the target charging voltage profile. A first object is to provide a charging control method for a welding power source, and a second object is to provide an electrostatic energy storage welding power source that directly uses such a charging control method.

  The inventor of the present application employs a configuration in which a single-phase AC power source is used as an input power source, and a charging current is rectified from the power source by a mixed-bridge full-wave rectifier circuit and a charging current flows to a charging capacitor. Focusing on the fact that the original form of the current remains, the current per cycle varies from time to time, and that the difference in the target voltage per sampling time unit is small when the target charging voltage is low, It came to do.

  First, even if the target voltage is low, if a predetermined value is added to the difference between the target voltage and the feedback voltage to formally increase the difference for each sampling time, the PID gain does not become extremely large. If the time during which the thyristor of the mixed bridge full-wave rectifier circuit is turned on is increased, the charging current increases and the followability to the target charging voltage profile is improved.

  Second, when the target voltage is high and the charging voltage approaches the voltage (effective value) of the input AC power supply, the thyristor of the mixed bridge full-wave rectifier circuit is turned on by gradually increasing the PID gain at each sampling time. If the charging time is gradually increased, the charging current gradually increases and the followability to the target charging voltage profile is improved.

That is, according to the charging control method for an electrostatic energy storage welding power source according to the present invention, a charging current obtained by full-wave rectification by phase control by PID control from a single-phase AC power source is supplied to the capacitor for a predetermined time. A charging control method for an electrostatic energy storage welding power source in which a target charging voltage corresponding to a predetermined stored energy is charged, wherein the PID control uses the following data.
a) Ideal target charging voltage profile data obtained by uniformly increasing the sampling timing determined according to the frequency of the input AC power supply and the full-wave rectification method when charging up to the target charging voltage within the predetermined time period b) When the target charging voltage is low and the ideal target charging voltage profile cannot be followed by the PID control, a low value obtained by adding a predetermined value as an offset value to the ideal target charging voltage profile. C) Target charging voltage profile data for voltage c) When the predetermined charging voltage is high, the charged voltage becomes high and approaches the voltage (effective value) of the input AC power supply. If the same voltage rise cannot be obtained, the charging Adjusted PID gain such increase of equal

In addition, the electrostatic accumulator welding power source according to the present invention uses a current obtained by full-wave rectifying a single-phase AC power source under phase control by PID control as a charging current for the capacitor. An accumulation-of-electrostatic-accumulation-type welding power source including the following configuration.
a) Input unit for setting stored energy as welding energy per one time and instructing to start welding b) From the stored energy set by the input unit to the target charging voltage VC and welding speed determined according to the capacity of the capacitor Accordingly, the ideal target charging voltage in which the voltage charged in the capacitor within a predetermined charging time tC rises linearly for each unit time determined according to the frequency and rectification of the single-phase AC power supply to the target charging voltage VC. Profile data,
When the target charging voltage VC is low and the ideal target charging voltage profile cannot be followed only by adjusting the PID gain, the predetermined value is added to the ideal target charging voltage profile as an offset value. C) a target charging voltage profile table for storing target charging voltage profile data; and c) a PID gain table for storing a PID gain that follows the target charging voltage profile data.

  According to the charging method of the present invention, it is possible to charge the capacitor in accordance with the target charging voltage profile in a charging time set in advance in accordance with the welding speed on the capacitor according to the set stored energy. Therefore, it is possible to provide a high-speed charging control method for the electrostatic energy storage type welding power source.

  Further, according to the electrostatic energy storage welding power source according to the present invention, the voltage determined according to the stored energy set by the user is applied to the target charging voltage profile with the charging time set in advance according to the welding speed to the capacitor. Follow-up charging is possible. Therefore, since the tact time can be shortened by shortening the welding speed, an easy-to-use electrostatic energy storage welding power source can be provided.

It is a schematic block diagram of the electrostatic energy storage type welding power source which becomes this invention. It is a schematic block diagram of the charge control part of the electrostatic energy storage type welding power source of FIG. It is a schematic setting flowchart figure of the various parameter tables used for the charge control method which becomes this invention. It is a figure which shows the relationship between the PID gain used for the charge which becomes this invention, an offset value, and a target charging voltage profile. It is a schematic flowchart figure which shows the charge control which becomes this invention. It is a figure which shows notionally the difference of the target charge voltage profile when performing charge control using the conventional PID gain, and an actual charge voltage profile.

Next, the present invention will be described in detail with reference to the drawings.
1 is a schematic block diagram of an electrostatic energy storage welding power source according to the present invention, FIG. 2 is a schematic block diagram of a charge control unit of the electrostatic energy storage welding power source of FIG. 1, and FIG. FIG. 4 is a diagram showing the relationship between the PID gain, offset value, and target charging voltage profile used for charging according to the present invention, and FIG. 5 shows the present invention. It is a schematic flowchart figure which shows the charge control which becomes.

Hereinafter, the present invention will be described in detail with reference to the drawings.
Note that the present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are as means for solving the present invention. It is not always essential.

  As shown in FIG. 1, an electrostatic energy storage welding power source 10 according to the present invention includes a mixed bridge full-wave rectifying unit 1 composed of two thyristors 1 a and 1 b and two diodes 1 c and 1 d, a charging current limiting resistor 2, A charging capacitor (corresponding to the large-capacity capacitor) 3, a charging control unit 4, a discharging control unit 5, a discharging unit 6 and a welding transformer 7, a mixed bridge full-wave rectifying unit 1, a charging current limiting resistor 2, a charging The capacitor 3 and the charging control unit 4 are related to charging.

  In the electrostatic accumulator welding power source 10, the mixed bridge full-wave rectifying unit 1 is connected to a commercial AC 50 Hz single-phase 200 V power source 9 (hereinafter referred to as an input AC power source 9), and is generated from the charging control unit 4 as described later. 2 (c and d in FIGS. 1 and 2), the two thyristors 1a and 1b are alternately turned on and off, and the current rectified only during the on-period is used as the charging current. Through the charging capacitor 3.

  The charging capacitor 3 is gradually charged by this charging current, and reaches a predetermined target charging voltage (target voltage) after a predetermined time. The charging control during this time will be described later in detail. When the charging is completed in this manner, the discharge unit 6 is driven by the discharge control signal from the discharge control unit 5 to release the energy accumulated in the charging capacitor 3 in a short time, and between the welding electrodes (not shown) via the welding transformer 7. Apply welding current.

  As shown in FIG. 2, the charging control unit 4 includes a control unit 21, an input unit 22, a target charging voltage profile table 23, a PID gain table 24, a charging voltage detection unit 25, an operation amount calculation unit 26, and a synchronization signal detection unit 27. And a phase control unit 28. The target charging voltage profile table 23 and the PID gain table 24 are referred to as parameter tables.

Here, the input unit 22 receives the setting of the stored energy and the welding start command by the user and sends this information to the control unit 21. The charging voltage detection unit 25 detects the charging voltage of the charging capacitor 3 and feeds back the feedback voltage Vdet. To the control unit 21 (e and f in FIGS. 1 and 2).
The control unit 21 creates target charging voltage profile data calculated according to the capacity C of the charging capacitor 3 from a fixed charging time tC determined in advance by the number of energizations of the welding power source and the set accumulated energy. Store in the charging voltage profile table 23. A predetermined offset value may be added to the target charging voltage profile data according to the target charging voltage. Including this, the creation of the target charging voltage profile data will be described in detail later.

  The synchronization signal detection unit 27 receives the input AC power supply 9 (a and b in FIGS. 1 and 2), and detects a zero cross point of the input AC power supply 9 as a starting point of an on / off timing of a gate signal described later as a synchronization signal. To do.

  The PID gain table 24 takes the difference between the feedback voltage Vdet from the charging voltage detector 25 and the target voltage VC by PID control so as to follow the target charging voltage profile stored in the target charging voltage profile table 23, and calculates the operation amount. Stores the PID gain at the time of calculation. The PID gain has a value corresponding to the target voltage VC as shown in FIG. 4, and is set in at least five regions. The setting of the PID gain will be described later in detail.

  The control unit 21 feeds back the feedback voltage Vdeti from the charge voltage detection unit 25 at every sampling time tsmpi (i is a positive integer of 1 to n, the same applies hereinafter) determined by the frequency of the input AC power supply 9 and the mixed bridge full-wave rectifier circuit 1. Then, the target voltage VCi (the offset value is added according to the target voltage) VCi from the target charging voltage profile table 23 and the PID gain corresponding to the target voltage are read from the PID gain table 24, and the operation amount calculation unit 26 is read. Send it out. The sampling time tsmp is also referred to as a unit time tsmp.

  The operation amount calculation unit 26 receives these read data, calculates a difference between the feedback voltage Vdeti and the target voltage VCi every unit time tsmpi, multiplies the difference by a PID gain, and adds the result to perform an operation. The amount of time is calculated, and a time tON for turning on the thyristors 1a and 1b of the mixed-bridge full-wave rectifying unit 1 according to the manipulated variable is obtained and sent to the phase control unit 28.

  The phase control unit 28 receives the time tON and the synchronization signal from the synchronization signal detection unit 27, generates gate signals for turning on the thyristors 1a and 1b starting from the synchronization signal, and supplies them to the gates of the thyristors 1a and 1b. (C and d in FIGS. 1 and 2). As described above, the thyristors 1a and 1b are alternately turned on / off in response to the gate signals, and rectify the alternating current from the input alternating current power source 9 during the on state and charge the charging capacitor 3 with the charging current. To do. Thus, the charging capacitor 3 is charged with the target voltage VC following the target charging voltage profile.

  Next, the creation of the parameter table described above for the electrostatic energy storage welding power source 10 that performs such charge control will be described.

[Create target charging voltage profile table]
First, the target voltage VC determined according to the capacity C of the charging capacitor 3 is determined from the stored energy set by the user. Here, it is assumed that the charging capacitor 3 is completely discharged before charging. Next, assuming that the charging capacitor 3 is charged so as to rise linearly, the target voltage VC is divided by a predetermined charging time tC to calculate the rising slope of the charging voltage.

  Next, the frequency of the input AC power supply 9 and the sampling time tsmp (unit time tsmp) determined by the mixed bridge full-wave rectifier circuit 1 are obtained. Since the charging capacitor 3 is linearly charged every unit time tsmp and charged to the target voltage VC, ideal target charging voltage profile data (hereinafter referred to as ideal target charging) is obtained by multiplying the unit time tsmp by the slope. (Referred to as voltage profile data) and the ideal target charging voltage profile data for each unit time tsmp is stored in the target charging voltage profile table 23. The unit time is 10 ms because the input AC power supply 9 is a 50 Hz single-phase AC power supply as described above.

[Create PID gain table]
First, an ideal target charging voltage profile is obtained as described above with the target voltage VC as the maximum charging voltage, and a PID gain that increases the charging voltage so as to follow this profile is obtained as a temporary PID gain. Each time tsmp is stored in the PID gain table 24. At this time, the gain of each control of P (proportional), I (integral), and D (differential) is obtained using a known means. That is, the gain of each control of P, I, and D that improves follow-up according to the difference between the target voltage VCi read out from the target charging voltage profile table 23 every unit time tsmp and the feedback voltage Vdeti at this time. Ask.

  Next, using this temporary PID gain, the target voltage VC is determined and the charging operation is actually performed. At this time, the final PID is adjusted by adjusting the PID gain so as to eliminate the difference per unit time tsmp from the ideal target charging voltage profile and the actual charging voltage profile (feedback voltage per unit time tsmp of the capacitor charging voltage). Gain is obtained and stored in the PID gain table 24 every unit time tsmp. Specifically, the target voltage VC is divided and adjusted to set the PID gain as follows.

  In order to improve the followability, the PID gain is changed according to the difference between the target voltage VCi and the feedback voltage Vdeti in one ideal target charging voltage profile. The PID gain is set to a different value by dividing into five areas according to the VC (a to o in FIG. 4).

  As described above, the first reason is that charging is performed at a predetermined charging time tC regardless of the target voltage VC, so that the difference between the target voltage VCi and the target voltage VCi + 1 per unit time tsmp is large depending on the size of the target voltage VC. Because it is different. The second reason is that, when the target voltage VC and the voltage (effective value) of the input AC power supply 9 are approximately the same, the mixed bridge full-wave rectifier circuit 1 is used, so that full-wave rectification is sine. This is because, since the original shape of the wave is maintained, even if the time for turning on the thyristors 1a and 1b is increased, the charging current does not increase corresponding to the time.

  From this, the target voltage VC is about ¾ of the voltage (effective value) of the input AC power supply 9 (as described above, the input AC voltage is 200 V, so 150 V), and the difference per unit time tsmp is somewhat large in phase. The charging current increases in proportion to the rate at which the ON period of the gate signal from the control unit 28 is increased, and as a result, the charging voltage increases (a, i, c in FIG. 4) and when it does not (D, o in FIG. 4). Set it separately.

  Even when the difference is small, the target voltage VC is lower than about 1/4 (50 V) of the voltage (effective value) of the input AC power supply 9, and the charging current increases in proportion to the rate of increasing the ON period of the gate signal. However, when the PID gain is adjusted and the followability is poor even when the PID gain is adjusted because the difference in the target voltage per unit time of the target charging voltage profile is small (a in FIG. 4), the target voltage is 3 / of the voltage of the input AC power supply 9. It is set separately when the charging current does not increase in accordance with the ratio of increasing the ON period at about 4 (150 V) or more (D, O in FIG. 4).

  Further, when the target voltage VC is near the boundary of about 1/4 (50 V) of the voltage of the input AC power supply 9 (a in FIG. 4) and the target voltage VC is high and has reached the vicinity of the target voltage VC (FIG. 4). ) Is also set separately. That is, as described above, it is divided into five regions (A to O in FIG. 4), and when expressed based on the PID gain at the center of the target voltage VC (c in FIG. 4), the region where the target voltage VC is low (in FIG. 4). A) has a large PID gain and a constant value, and a boundary region between this region and the central portion (a) in FIG. 4 has a value that gradually decreases the PID gain, and the central portion and the target voltage VC are high and the target VC is high. The region until the voltage approaches (D in FIG. 4) is a value that gradually increases the PID gain, and the region where the target voltage VC is high and reaches the vicinity of the target voltage VC (O in FIG. 4) is increased gradually. Set the maximum value to a constant value.

[Update target charging voltage profile table]
In the region where the target voltage VC is about 1/4 (50 V) or less of the voltage of the input AC power supply 9 (corresponding to (a) in FIG. 4), the target voltage VC is too low. Since the difference between the target voltage at each time tsmp (VCsi of tsmpi and VCi + 1 of tsmpi + 1) is too small, the target voltage profile cannot be followed only by the setting of the PID gain, resulting in a delay.

  Even in such a case, if the operation amount is increased by increasing the difference formally to increase the ON period of the gate signal and the ON period of the thyristors 1a and 1b, the charging current is accordingly increased. As a result, it is known that the charging voltage can be increased, so that the difference and the PID gain are experimentally obtained.

  The obtained PID gain is used as it is. On the other hand, the obtained difference is divided into the original difference and the offset value to be lifted, and this offset value is added to the target voltage VCi for each unit time tsmpi of the ideal target charging voltage profile to obtain the target charging voltage profile data for low voltage. Is stored in the target charging voltage profile table 23 separately from the ideal one, and the target charging voltage profile table 23 is updated. In this case, although there is a difference in the offset value for each unit time tsmpi, it is not a large difference and is set to a constant value because it is simplified.

In this way, the PID gain table and the target charging voltage profile table are created and updated.
Next, the charging operation of the electrostatic energy storage welding power source 10 including the PID gain table and the target charging voltage profile table created in this manner will be described with reference to FIG.

A target voltage VC is obtained from the initially set stored energy, and an ideal or low voltage target charging voltage profile table is selected according to the target charging voltage.
Then, first, the first target voltage VC1 is read from the selected target charging voltage profile table (S501 and S502 in FIG. 5). At this time, the PID gain is read from the PID gain table 24 and the charging voltage Vdet1 of the capacitor 3 is read from the charging voltage detector 25 (S503 and S504 in FIG. 5).

  Next, the difference between the target voltage VC1 and the feedback voltage Vdet1 is calculated (S505 in FIG. 5). Subsequently, an operation amount is calculated by PID calculation using the difference and the PID gain (S506 in FIG. 5). Next, a phase control amount that determines the ON period of the thyristors 1a and 1b of the mixed bridge full-wave rectifying unit 1 that can supply a charging current determined according to the operation amount is calculated (S507 in FIG. 5).

  Next, based on this phase control amount, a gate signal is generated as a phase control signal for turning on the thyristors 1a and 1b with reference to the zero cross point of the input AC power supply 9 detected by the synchronization signal detection unit 27, and the gate of the thyristor (S508 in FIG. 5).

Since the thyristors 1a and 1b are alternately driven by the gate signal, the anode and the cathode are electrically connected, and the charging current flows to the charging capacitor 3 through the mixed bridge full-wave rectifier circuit 1 and the charge limiting resistor 2 to charge the charging capacitor. 3 is charged (S509 in FIG. 5).
Since this charging voltage is always detected, the voltage after charging is detected (S510 in FIG. 5).

Next, the second target voltage VC2 is read from the target charging voltage profile table 23 (S511, S502 in FIG. 5). And the capacitor | condenser 3 is charged through the above operations (S503-S509 of FIG. 5).
This operation is executed by the number (n) of the target voltage VCi stored in the target charge voltage profile table 23 (Yes in S512 in FIG. 5), and finally the capacitor 3 is charged with the target voltage VC (FIG. No. 5 S512).

  The charge control method and the charge control means for the electrostatic energy storage welding power source described above are merely examples, and various modifications can be made without changing the gist of the invention. For example, the operation amount calculation unit is incorporated in a function in the control unit and executed. Also, the function of the charge control unit is incorporated into one element and executed.

1 Mixed bridge full-wave rectifier 2 Charging current limiting resistor 3 Charging capacitor
4 charge control unit, 5 discharge control unit, 6 discharge unit, 7 welding transformer,
21 control unit, 22 input unit, 23 target charging voltage profile table,
24 PID gain table, 25 charge voltage detection unit, 26 operation amount calculation unit,
27 Sync signal detector, 28 Phase controller

Claims (2)

  1. An electrostatic accumulator in which a charging current obtained by full-wave rectification by phase control by PID control from a single-phase AC power supply is supplied to a capacitor, and the capacitor is charged with a target charging voltage corresponding to a predetermined stored energy within a predetermined time. Charge control method for a welding power source,
    The PID control uses the following data: a charging control method for an electrostatic energy storage welding power source.
    a) Ideal target charging voltage profile data obtained by uniformly increasing the sampling timing determined according to the frequency of the input AC power supply and the full-wave rectification method when charging up to the target charging voltage within the predetermined time period b) When the target charging voltage is low and the ideal target charging voltage profile cannot be followed by the PID control, a low value obtained by adding a predetermined value as an offset value to the ideal target charging voltage profile. C) Target charging voltage profile data for voltage c) When the predetermined charging voltage is high, the charged voltage becomes high and approaches the voltage (effective value) of the input AC power supply. If the same voltage rise cannot be obtained, the charging Adjusted PID gain such increase of equal
  2. An electrostatic energy storage welding power source that stores energy in a capacitor by using a current obtained by subjecting a single-phase AC power source to phase control by PID control and full-wave rectification as a charging current of the capacitor. Electrostatic energy storage type welding power source characterized in that it includes: a) an input unit for setting stored energy as welding energy per one time and an instruction to start welding b) from the stored energy set by the input unit The target charging voltage VC determined according to the capacitance C of the capacitor and the voltage charged in the capacitor within the charging time tC determined in advance according to the welding speed to the target charging voltage VC and the frequency of the single-phase AC power supply Ideal target charging voltage profile data that rises linearly for each unit time tsmp determined according to
    When the target charging voltage VC is low and the ideal target charging voltage profile cannot be followed only by adjusting the PID gain, the predetermined value is added to the ideal target charging voltage profile as an offset value. C) a target charging voltage profile table for storing target charging voltage profile data; and c) a PID gain table for storing a PID gain that follows the target charging voltage profile data.
JP2011069724A 2011-03-28 2011-03-28 Charge control method for electrostatic energy storage welding power source and electrostatic energy storage welding power source Pending JP2012200781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011069724A JP2012200781A (en) 2011-03-28 2011-03-28 Charge control method for electrostatic energy storage welding power source and electrostatic energy storage welding power source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011069724A JP2012200781A (en) 2011-03-28 2011-03-28 Charge control method for electrostatic energy storage welding power source and electrostatic energy storage welding power source

Publications (1)

Publication Number Publication Date
JP2012200781A true JP2012200781A (en) 2012-10-22

Family

ID=47182290

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011069724A Pending JP2012200781A (en) 2011-03-28 2011-03-28 Charge control method for electrostatic energy storage welding power source and electrostatic energy storage welding power source

Country Status (1)

Country Link
JP (1) JP2012200781A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3407460A4 (en) * 2016-02-05 2019-01-23 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Terminal charging system, charging method, and power adapter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03174984A (en) * 1989-12-04 1991-07-30 Nippon Avionics Co Ltd Electrostatic stored energy type welding power unit
JPH10216957A (en) * 1997-02-07 1998-08-18 Matsushita Electric Ind Co Ltd Capacitor type resistance welder
JP2001259860A (en) * 2000-03-23 2001-09-25 Miyachi Technos Corp Power unit for resistance welding
JP2002160071A (en) * 2000-11-28 2002-06-04 Nippon Avionics Co Ltd Welding machine and its controlling method
JP2007274750A (en) * 2006-03-30 2007-10-18 Fujitsu Access Ltd Capacitor charger

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03174984A (en) * 1989-12-04 1991-07-30 Nippon Avionics Co Ltd Electrostatic stored energy type welding power unit
JPH10216957A (en) * 1997-02-07 1998-08-18 Matsushita Electric Ind Co Ltd Capacitor type resistance welder
JP2001259860A (en) * 2000-03-23 2001-09-25 Miyachi Technos Corp Power unit for resistance welding
JP2002160071A (en) * 2000-11-28 2002-06-04 Nippon Avionics Co Ltd Welding machine and its controlling method
JP2007274750A (en) * 2006-03-30 2007-10-18 Fujitsu Access Ltd Capacitor charger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3407460A4 (en) * 2016-02-05 2019-01-23 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Terminal charging system, charging method, and power adapter

Similar Documents

Publication Publication Date Title
JP5307333B2 (en) Wind power facility operation method
US7768801B2 (en) Current resonant DC-DC converter of multi-output type
CN1261274C (en) System and method for controlling electric-arc welding machine
US8638074B2 (en) Controllable universal supply with reactive power management
EP2716395B1 (en) Arc welding control method and arc welding device
US8952293B2 (en) Welding or cutting power supply using phase shift double forward converter circuit (PSDF)
CN1044304C (en) Improved power converter device for direct current power supply to an electric arc furnace
EP2519375B1 (en) Universal input power supply utilizing parallel power modules
EP1835607B1 (en) Apparatus and method for supplying DC power source
US8440936B2 (en) Welding power supply
EP2755310A1 (en) Control device for switching power supply circuit, and heat pump unit
US9391531B2 (en) Controlling a switched mode power supply with maximised power efficiency
JP4487008B2 (en) Power supply
JP5446137B2 (en) Switching power supply
MX2010002859A (en) Motor controller system and method for maximizing energy savings.
JP6193334B2 (en) System and method for global control of dual active bridges
JP2008173000A (en) Inverter apparatus
JP2009232587A (en) Power supply device and control method thereof
JP2004071444A (en) Electromagnetic induction heating cooker
EP2814163A3 (en) Power supply, power control method for controlling a standby mode, and display apparatus having the same
JP5263288B2 (en) AC pulse arc welding method
JP2013197098A (en) Light driving apparatus and method of the same
JP2011072092A (en) Output control apparatus of generator
CN104869693A (en) Valley to valley switching in quasi-resonant mode for driver
JP6026049B2 (en) Power converter

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20131115

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20140930

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20141006

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20150223