CN100420139C - Electroplate supply unit - Google Patents
Electroplate supply unit Download PDFInfo
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- CN100420139C CN100420139C CNB031585884A CN03158588A CN100420139C CN 100420139 C CN100420139 C CN 100420139C CN B031585884 A CNB031585884 A CN B031585884A CN 03158588 A CN03158588 A CN 03158588A CN 100420139 C CN100420139 C CN 100420139C
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Abstract
The present invention relates to an electroplate power supply unit. Alternating current voltage supplied by an alternating current power supply is rectified through a rectifier 34. A voltage reducing breaker 36 is used for reducing rectifying voltage and comprises field effect transistors FET40a and 40b controlled by pulse-width modulating signals during a conduction period. The rectifying voltage supplied by the rectifier 34 is reduced by the control of the conduction period. After transformed into alternating current voltage, a direct current and alternating current converter 50 is supplied to electroplating electrodes 59 and 60 by direct current voltage reduced by a voltage reducing chopper 36.
Description
Technical field
The present invention relates to electroplating supply unit, especially relevant with the electroplating supply unit that alternating current is provided.
Background technology
The used electroplating supply unit that alternating current is provided is used in the plating of the printed circuit board (PCB) of two-sided through hole mostly.Fig. 7 illustrates an example of this kind electroplating supply unit.Among this supply unit, the three-phase alternating voltage that is come by the three-phase commercial ac power source is by input rectifier 2 and filtering capacitor 4 rectifications.Be transformed to the high frequency voltage of several KHz by rectification and filtered voltage by frequency converter 6 to tens of KHz.Usually all use thyristors such as IGBT and FET to constitute full bridge circuit though frequency converter 6 is not shown, above-mentioned thyristor conduction period is by control circuit 8 controls.The high frequency voltage that is come by frequency converter 6 is reduced to the assigned voltage value by transformer 10 transformations.High frequency voltage after the transformation is by 12 rectifications of output rectifier, by reactance coil 14a, 14b filtering.Reactance coil 14a, 14b are wound on the same magnetic core.This is transformed to the low-frequency ac voltage of tens of and hundreds of Hz through the voltage of over commutation and filtering by frequency converter 16, and electroplated electrode 20a, 20b by direct current reactance coil 18a, 18b and electroplating bath offer plated item.Because frequency converter 16 also is connected thyristors such as IGBT and FET with full bridge circuit, thereby these thyristors conduction periods, control by control circuit 22.
Among this electroplating supply unit, the energy consumption that is used for the IGBT of frequency converter 6 and FET is big.In addition, it is also big to be arranged on the energy consumption of direct current reactance coil 18a, 18b of frequency converter 16 outputs.This two combine, the whole efficiency of electroplating supply unit is worsened.In addition, during by filter reactance coil 14a, 14b filtering, the energy consumption of this reactance coil 14a, 14b is big, and efficient is further worsened through the voltage of output rectifier 12 rectifications.In addition,, thereby be subjected to the inductive impact of this printed circuit on printed circuit board, the efficient of this supply unit is further reduced owing to direct current reactance coil 14a, 14b are connected with output rectifier 12 and frequency converter 16 by the circuit that forms.In addition, owing to used frequency converter 6 and transformer 10, the rising responsiveness of the electric current that produces on electroplated electrode 20a, 20b worsens.
Summary of the invention
Purpose of the present invention is to provide a kind of improved efficiency that makes just, and the electroplating supply unit of responsiveness raising.
The electroplating supply unit of one of mode of the present invention has the rectifier of rectification next alternating voltage by AC power.As AC power, can use three-phase alternating-current supply and single phase alternating current power supply.As rectifier, can use full-wave rectifying circuit and half-wave rectifying circuit.The commutating voltage step-down that the buck chopper device will be come by rectifier.This buck chopper device (chopper) comprises thyristor, can control conduction period according to pulse-width signal (pwm signal).The dc voltage conversion of the step-down that direct-current-alternating-current converter will be come by the buck chopper device is that alternating voltage offers electroplated electrode afterwards.As direct-current-alternating-current converter, can use the frequency converter of half-bridge type or full bridge type.
Among the electroplating supply unit that adopts above-mentioned formation, after the direct voltage usefulness buck chopper device step-down that obtains after the rectification AC power, be transformed to alternating voltage by direct-current-alternating-current converter and offer electroplated electrode.Thereby do not need input side rectifier, high frequency voltage transformation with frequency converter (inverter) and transformer, the efficient of this supply unit is improved.Especially because the buck chopper device is by conduction period of pwm signal control thyristor, thereby under the situation that produces load short circuits, can carry out short-circuit protection by the pulse amplitude of expression indication conduction period among the compression pwm signal.By expanding above-mentioned pulse amplitude, can accelerate to flow to the rate of climb of the voltage of electroplated electrode, also can accelerate the rate of climb of electroplating current, improve it and reply performance.
The electroplating supply unit of aforesaid way can a plurality of groups be connected in parallel.In this case, AC power is set at the three-phase alternating-current supply with neutral point.The buck chopper utensil of each group has the 1st and the 2nd buck chopper device.The 1st buck chopper device makes the current direction neutral point of the 1st polarity by direct-current-alternating-current converter, electroplated electrode, and the 2nd buck chopper device makes the current direction neutral point of the 2nd polarity by direct-current-alternating-current converter, electroplated electrode.The direct-current-alternating-current converter of each group has the electric current that makes the 1st polarity of being come by the 1st buck chopper device and flows to the 1st thyristor of neutral point and make the 2nd polarity electric current that is come by the 2nd buck chopper device flow to the 2nd thyristor of neutral point by above-mentioned electroplated electrode from above-mentioned electroplated electrode.In addition, the 1st and the 2nd buck chopper device and the above-mentioned direct-current-alternating-current converter of each group are connected to each other, so that make the electric current of the 1st and the 2nd polarity return above-mentioned neutral point.
Among this kind formation, what give that each machine provides is not the voltage between lines of three-phase alternating-current supply, but the little voltage that is equivalent to phase voltage that value compares.Therefore both can reduce the withstand voltage index of formation part of the electroplating supply unit of each group, thereby reduce production costs, the shared three-phase alternating-current supply of electroplating supply unit that again can a plurality of groups further reduces production cost.
Among the electroplating supply unit of aforesaid way, can between direct-current-alternating-current converter and electroplated electrode, reactance coil be set.In this case, when direct-current-alternating-current converter did not provide electric current to reactance coil, input side that can be from above-mentioned reactance coil to above-mentioned buck chopper device was provided with the one-way regeneration path that makes based on the regeneration of current of energy stored in the above-mentioned reactance coil.This path of regenerating can be made of the 1st and the 2nd one-way element.The circuit of the thyristor in the 1st one-way element and the direct-current-alternating-current converter is arranged in parallel, and only allows the input of current direction buck chopper device.The 2nd one-way element is connected with the 1st one-way element, only allows the input of current direction buck chopper device.
Among this constitutes, owing to the electric current that can make based on energy stored in the reactance coil that is arranged between direct-current-alternating-current converter and electroplated electrode.Revert to the input side of buck chopper device through the regeneration path, thereby the efficient of this supply unit is improved.
In addition, also can filtering capacitor be set at the input side of buck chopper device.In this case, can between the input side of filtering capacitor and buck chopper device, boost capacitor be set, make electric current flow to above-mentioned filtering capacitor through boost capacitor from the regeneration path.Among this formation, make the electric current that comes from the regeneration path flow to filtering capacitor through boost capacitor.At this moment, the voltage of boost capacitor rises.When direct voltage being provided for the buck chopper device from filtering capacitor, the voltage of boost capacitor and the voltage of filtering capacitor overlap.The input voltage that has boosted is provided for the buck chopper device.Therefore, the gradient of electroplating current becomes precipitous, can obtain good plating performance.
Among the electroplating supply unit of aforesaid way, also the buck chopper device can be arranged on the circuitron substrate.For example, when the buck chopper device uses the buck chopper device of electric current of the 1st and the 2nd polarity, the buck chopper device of the electric current of the 1st polarity is set, the buck chopper device of the 2nd polarity electric current is set at another side in the one side of double-sided substrate.Comprise when the buck chopper device under the situation of thyristor and reactance coil, these elements can be connected the one side of double-sided substrate, thereby can shorten the length of its connecting line.
Description of drawings
Fig. 1 is the circuit diagram of the electroplating supply unit of the 1st execution mode of the present invention.
Load current in the electroplating supply unit of Fig. 2 presentation graphs 1.
Fig. 3 is the circuit diagram of the electroplating supply unit of the 2nd execution mode of the present invention.
Fig. 4 is the circuit diagram of the electroplating supply unit of the 3rd execution mode of the present invention.
The waveform of the electroplating supply unit each several part of Fig. 5 presentation graphs 4.
Fig. 6 is the circuit diagram of the electroplating supply unit of the 4th execution mode of the present invention.
Fig. 7 is the circuit diagram of used electroplating supply unit.
Embodiment
As shown in Figure 1, the electroplating supply unit of the 1st execution mode of the present invention has AC power, and the power supply terminal 30a to 30c of three-phase source power supply for example can be provided.These power supply terminal 30a to 30c and transformer, for example the primary coil 32P of the Y shape tie lines of three-phase transformer 32 is connected.The secondary coil 32S of this transformer 32 also adopts Y shape tie lines, has neutral point 32T.Among secondary coil 32S, induction produces the three-phase alternating voltage after the transformation.This transformer 32 has the function as AC power.The three-phase alternating voltage that induction produces on secondary coil 32S can be by three-phase full wave rectifier circuit 34 rectifications.This three-phase full wave rectifier circuit 34 is made of rectifier diode 34a to 34f.Voltage through these three-phase full wave rectifier circuit 34 rectifications generates between positive output terminal 34P and negative output terminal 34N.
This voltage through over commutation is provided for buck chopper device 36.Buck chopper device 36 has the 1st polarity, for example the buck chopper device 36a of positive polarity and the 2nd polarity, for example the buck chopper device 36b of negative polarity.
The buck chopper device 36a of positive polarity has filtering capacitor 38a between the neutral point 32T of positive output terminal 34P and secondary coil 32S.Be connected on the positive pole of filtering capacitor 38a of positive output terminal 34P and connecting thyristor, for example drain electrode of field-effect transistor FET40a.The source electrode of FET40a is connected the end of direct current reactance coil 42a.The other end of this direct current reactance coil 42a links to each other with the lead-out terminal 44a of buck chopper device 36a.Reverse parallel connection diode 46a between drain electrode-source electrode of FET40a.That is to say that the negative electrode of diode 46a is connected with the drain electrode of FET40a, the anode of diode 46a is connected with the source electrode of FET40a.And then on the contact of the source electrode of FET40a and reactance coil 42a, being connected the negative electrode of diode 48a, its anode is connecting neutral point 32T.
The buck chopper device 36b of negative polarity is provided with filtering capacitor 38b between the neutral point 32T of lead-out terminal 34N and secondary coil 32S.The source electrode of FET40b is connected on the negative pole of the filtering capacitor 38b that links to each other with negative output terminal 34N.The drain electrode of FET40b links to each other with the end of direct current reactance coil 42b.The other end of direct current reactance coil 42b links to each other with the lead-out terminal 44b of buck chopper device 36b.Reverse parallel connection diode 46b between the drain electrode one source pole of FET40b.That is to say that the negative electrode of diode 46b is connected in the drain electrode of FET40b, the anode of diode 46b is connected on the source electrode of FET40b.In addition, the anode of diode 48b is connected on the contact of the drain electrode of FET40b and reactance coil 42b, and its negative electrode is connected on the neutral point 32T.
The reactance coil 42b of the reactance coil 42a of positive polarity buck chopper device 36a and negative polarity buck chopper device 36b constitutes on same magnetic core, but constitutes separately.
These FET40a, 40b are subjected to offer from buck chopper device control circuit 41 pulse-width control signal (pwm signal) control of grid separately.That is to say that when making the FET40a conducting, FET40b is conducting also, when FET40a was non-conduction, FET40b also became non-conduction, by pwm signal control FET40a, 40b.Can control the conduction period of FET40a, 40b by the duty ratio of this pwm signal of change.
Between the lead-out terminal 44a and 44b of this buck chopper device 36, be provided with direct-current-alternating-current converter 50.This direct-current-alternating-current converter 50 is with two thyristors.For example IGBT52a, 52b and emitter separately-collector electrode conducting channel are connected in series.That is to say that the collector electrode of IGBT52a is connected with lead-out terminal 44a, the emitter of IGBT52a is connected with the collector electrode of IGBT52b, and the emitter of IGBT52b is connected with lead-out terminal 44b.
54 pulse-width control signals that do not provide of ac-dc conversion control circuit (pwm signal) control is provided its grid of above-mentioned IGBT52a, 52b.It is for example non-conduction during low level state that IGBT52a, 52b are in the 1st state at the pwm signal that offers it---for example conducting during high level state is in the 2nd state---.Its pwm signal is set at two kinds---and during the IGBT52a conducting, IGBT52b is non-conduction, and when IGBT52a was non-conduction, IGBT52b was conducting.In addition, conduction period can be controlled by the duty ratio of adjusting these pwm signals.And in two kinds of pwm signals, non-conduction during being in conducting state and becoming conducting state from the IGBT of a side for two IGBT are all become to the IGBT of opposite side, set during the low level process.For making above-mentioned IGBT52a, 52b conducting and non-conduction repeatedly in tens of extremely frequency ranges of hundreds of Hz, set pwm signal.
Reverse parallel connection diode 56a, 56b in the collector emitter conducting channel of IGBT52a, 52b.That is to say that the negative electrode of diode 56a, 56b is connected with the collector electrode of IGBT52a, 52b, its anode is connected with the emitter of IGBT52a, 52b.
The lead-out terminal of direct-current-alternating-current converter 50, promptly the contact of the collector electrode of the emitter of IGBT52a and IGBT52b is connected with the electroplated electrode 59 of electroplating bath by direct current reactance coil 58.Between this electroplated electrode 59 and another electroplated electrode 60, dispose plated item.Between electroplated electrode 60 and neutral point 32T, connecting direct current reactance coil 61.
In addition, between the positive pole of the lead-out terminal 44a of buck chopper device 36 and the filtering capacitor 38a of buck chopper device 36, be connected the unidirectional element that forms the regeneration path with diode 56a jointly, for example diode 62a.This diode 62a flows to filtering capacitor 38a for making electric current from lead-out terminal 44a, and its anode is connected with lead-out terminal 44a, and negative electrode is connected with the positive pole of filtering capacitor 38a.Identical therewith, between the negative pole of the filtering capacitor 38b of the lead-out terminal 44b of buck chopper device 36 and buck chopper device 36, connecting the diode 62b that forms the regeneration path with diode 56b jointly.This diode 62b makes electric current flow to lead-out terminal 44b from the negative pole of filtering capacitor 38b, and its anode is connected with the negative pole of filtering capacitor 38b, and negative electrode is connected with lead-out terminal 44b.
The buck chopper device 36 of this electroplating supply unit is gone up at double-sided printed-circuit board (not shown) and is constituted.One side at this double-sided substrate forms positive polarity buck chopper device 36a.Constitute negative polarity buck chopper device 36b at another side.All be formed on same of double-sided printed-circuit board owing to constitute FET40a, the reactance coil 42a of positive polarity buck chopper device 36a, thereby the circuit that connects the two shortens, except not producing unnecessary loss, also can improve its noise resistance amount.Identical therewith, because the FET40b, the reactance coil 42b that constitute the buck chopper device 36b of negative polarity also are formed in same of double-sided printed-circuit board, thereby the circuit that connects the two shortens, and except not producing unnecessary loss, can also improve its noise resistance amount.
Among the electroplating supply unit that adopts this kind formation, when having connected the three-phase commercial ac power source on the power supply terminal 30a to 30c, induction produces three-phase alternating voltage in the secondary coil 32S of transformer 32.Be that transformer 32 has the function as AC power.The alternating voltage that induction produces is by rectifier 34 rectifications.This commutating voltage is by filtering capacitor 38a, the 38b filtering of buck chopper device 36.By the pwm signal that is come by buck chopper device control circuit 41, FET40a, 40b be conducting and non-conduction repeatedly, and consequently filtering voltage is by step-down.Voltage after this step-down generates between lead-out terminal 44a, 44b.
When the IGBT52a conducting, and IGBT52b when non-conduction during as shown in Figure 2 in the tp, the positive polarity electric current flows to IGBT52a, reactance coil 58, electroplated electrode 59, plated item, electroplated electrode 60, reactance coil 61 and neutral point 32T from lead-out terminal 44a.When IGBT52b conducting and IGBT52a were non-conduction, in the tn, the negative polarity electric current flowed to reactance coil 61, electroplated electrode 60, plated item, electroplated electrode 59, reactance coil 58 and IGBT52b from neutral point 32T during as shown in Figure 2.Because positive polarity and negative polarity electric current alternately flow as mentioned above, thereby be applicable to the plating of two-sided through hole printed circuit board (PCB).
Among this electroplating supply unit, owing to having adopted the three-phase alternating voltage that comes by transformer 32 by rectifier 34 rectifications, and then by the constituting of buck chopper device 36 step-downs, thereby the loss relevant with the generation of direct voltage occurs over just FET40a, 40b.Just because of this, the loss relevant with the generation of direct voltage is very little, thereby can improve the efficient of this supply unit.In addition, also can improve the rate of climb of the electric current that offers electroplated electrode 60a, 60b, improve the performance of replying of this supply unit.
In addition, FET40a, 40b can control conduction period by the pwm signal that control circuit 41 provides.Therefore, under situations such as generation load short circuits, owing to can flow to the electric current of FET40a, 40b by the duty ratio restriction that reduces pwm signal, thereby can realize short-circuit protection, and short-circuit protection circuit is not set specially in addition.In addition, by increasing the duty ratio of pwm signal, can accelerate the rise of output voltage speed of buck chopper device 36, quickening offers the rate of climb of the electric current of electroplated electrode 60a, 60b, can improve the performance of replying of this electric current.
In addition, all being under the nonconducting state, based on the current direction electroplated electrode 59 that is stored in the energy in the reactance coil 58, plated item, electroplated electrode 60 and reactance coil 61 from IGBT52a conducting and the non-conduction IGBT52a of carrying out the transition to of IGBT52b is non-conduction and the transition period of IGBT52b conducting exists IGBT52a, 52b.This electric current can flow by filtering capacitor 38b, diode 62b, diode 56b with based on the electric current that is stored in the energy in the reactance coil 61, regenerates in filtering capacitor 38b.Just because of this, except the efficient that can improve this supply unit, can also remove the buffer circuits corresponding with IGBT52b.
Identical therewith, non-conduction and the transition period IGBT52a conducting exists from the non-conduction IGBT52b that carries out the transition to of IGBT52b conducting and IGBT52a, IGBT52a, 52b all are under the nonconducting state, based on the current direction electroplated electrode 60 that is stored in the energy in the reactance coil 61, plated item, electroplated electrode 59 and reactance coil 58.The electric current that the energy of this electric current in being stored in reactance coil 58 followed flows to diode 56a, diode 62a and filtering capacitor 38a, regenerates in filtering capacitor 38a.Just because of this, except the efficient that can improve this supply unit, also can remove the buffer circuits corresponding with IGBT52.
And when FET40a, 52a were all non-conduction, current direction diode 62a, filtering capacitor 38a, diode 48a based on being stored in the energy among the reactance coil 42a regenerated in filtering capacitor 38a.Identical therewith, when FET40b, IGBT52b were all non-conduction, current direction diode 48b, filtering capacitor 38b, diode 62b based on being stored in the energy among the reactance coil 42b regenerated in filtering capacitor 38b.So, in buck chopper device 36, also can reduce the loss that should in reactance coil 42a, 42b, produce, improve the efficient in this supply unit.And FET40a, 40b are still alternately repeating conducting, non-conduction in the cycle with regulation at this moment.
This supply unit has used the neutral point 32T of a secondary side of transformer 32 in the later circuit of rectifier 34, it is also low when not using neutral point to be additional to voltage ratio in this circuit.Just because of this, FET that uses in this circuit and IGBT can use the low element of rated voltage.
Fig. 3 illustrates the 2nd execution mode of the present invention.Among this execution mode, be provided with the later circuit of a secondary side of a plurality of groups the 1st transformers 32 in the electroplating supply unit shown in the execution mode, the i.e. circuit that constitutes by rectifier 34, buck chopper device 36, direct-current-alternating-current converter 50, reactance coil 58,61, diode 62a, 62b etc., for example 2 groups.These 2 groups of circuit parallel connections provide three-phase alternating voltage for circuit separately by shared transformer 32.Self-evident, neutral point 32T also is shared.
As above-mentioned, because two circuit that are connected in parallel, thereby under the situation of the same power of output, among the inscape of each circuit, can use the low element of rated current, thereby can reduce production costs.
Fig. 4 illustrates the 3rd execution mode of the present invention.This execution mode constitutes the part difference except that buck chopper device 36, and all the other are all identical with the 1st execution mode.Identical part adopts same label and omits its explanation.
Among this buck chopper device 36, be connected boost capacitor 70 between the positive pole of filtering capacitor 38a and the drain electrode of FET40a.In addition, unidirectional element, for example the anode of diode 72 is connected with the positive terminal of filtering capacitor 38a, and negative electrode is connected with the drain electrode of FET40.
Identical therewith, between the source electrode of the negative pole of filtering capacitor 38b and FET40b, be connected boost capacitor 74.In addition, the negative electrode of diode 76 is connected the negative side of filtering capacitor 38b, and anode is connecting the source electrode of FET40b.
Owing to adopted this kind formation, when FET40a and 40b conducting, because of electric current flows away through diode 72 and 76, thereby boost capacitor 70,74 can not be recharged.Yet working as from IGBT52a is conducting state, and IGBT52b is a nonconducting state to IGBT52a is that nonconducting state and IGBT52b are conducting state when changing, based on the electric current of the storage power of reactance coil 58,61 through diode 56a, 62a with boost capacitor 70 and filtering capacitor 38a charging.So, among boost capacitor 70, promptly produced charging voltage.Then, when IGBT52a is in conducting state, when IGBT 52b is in nonconducting state and FET40a and is in conducting state, shown in Fig. 5 (a), the added up voltage of voltage A ' of the voltage A of filtering capacitor 38a and boost capacitor 70, promptly the voltage that only the charging voltage A ' part of boost capacitor 70 is boosted is applied on the direct-current-alternating-current converter 50.Identical therewith, when from IGBT52b be conducting state and IGBT52a be nonconducting state to become IGBT52b be nonconducting state and IGBT52a when being conducting state, boost capacitor 74 is recharged.And, become non-conductionly when IGBT52b becomes conducting state, IGBT52a, when FET40b was conducting state, the voltage that only charging voltage of boost capacitor 74 is partly boosted in the voltage of filtering capacitor 38b was applied in to direct-current-alternating-current converter 50.
As above-mentioned, because it is boosted to offer the voltage of direct-current-alternating-current converter 50, thereby as shown in Fig. 5 (b), the rising waveform of the electric current of the electroplated electrode 59,60 of flowing through becomes than original waveform B ' also want precipitous B waveform, thus improved the plating performance.
Fig. 6 illustrates the 4th execution mode.This execution mode is to have added the capacitor 70,74 shown in the 3rd execution mode, diode 72,76 on two buck chopper devices 36 in the 2nd execution mode.Owing to adopted this kind formation, had and the 2nd and the 3rd execution mode identical functions.
Among above-mentioned various execution modes, be provided with positive polarity and negative polarity buck chopper device 36a, 36b, but also can only establish the buck chopper device of a polarity.In addition, in the above-described embodiment, use be the three-phase commercial ac power source, but also can use single-phase commercial ac power source.
Claims (3)
1. an electroplating supply unit has to electroplate and uses power supply unit, and this plating comprises with power supply unit:
Three-phase full wave rectifier circuit is used for the three-phase alternating voltage that full-wave rectification has the three-phase alternating-current supply of neutral point, and generates the voltage of rectification between positive rectification output end and negative rectifier lead-out terminal;
The buck chopper device, comprise: positive step-down lead-out terminal, negative step-down lead-out terminal, the buck chopper device of positive polarity, buck chopper device with negative polarity, the buck chopper utensil of above-mentioned positive polarity has the 1st thyristor, the buck chopper utensil of above-mentioned negative polarity has the 2nd thyristor, the the above-mentioned the 1st and the 2nd thyristor is controlled conduction period according to pulse-width signal, the buck chopper device of above-mentioned positive polarity is according to the conducting of above-mentioned the 1st thyristor and non-conduction, the commutating voltage that reduction is provided by above-mentioned three-phase full wave rectifier circuit, positive voltage after generating step-down between above-mentioned positive step-down lead-out terminal and the above-mentioned neutral point, the buck chopper device of above-mentioned negative polarity is according to the conducting of above-mentioned the 2nd thyristor and non-conduction, the commutating voltage that reduction is provided by above-mentioned three-phase full wave rectifier circuit, negative voltage after generating step-down between above-mentioned negative step-down lead-out terminal and the above-mentioned neutral point, one end of above-mentioned the 1st thyristor connects positive rectification output end of above-mentioned three-phase full wave rectifier circuit, the other end connects above-mentioned positive step-down lead-out terminal by the 1st direct current reactance coil, this other end also connects the negative electrode of the 1st diode, the anode of above-mentioned the 1st diode connects above-mentioned neutral point, one end of above-mentioned the 2nd thyristor connects the negative rectifier lead-out terminal of above-mentioned three-phase full wave rectifier circuit, the other end connects above-mentioned negative step-down lead-out terminal by the 2nd direct current reactance coil, the other end of above-mentioned the 2nd thyristor also connects the anode of the 2nd diode, the negative electrode of above-mentioned the 2nd diode connects above-mentioned neutral point
Direct-current-alternating-current converter, has the 3rd and the 4th thyristor that between above-mentioned positive step-down lead-out terminal and above-mentioned negative step-down lead-out terminal, is connected in series, above-mentioned the 3rd thyristor was the non-conduction mutual alternate repetition of the 2nd state when above-mentioned the 4th thyristor was non-conduction the 1st state and above-mentioned the 4th thyristor conducting during above-mentioned the 3rd thyristor conducting, and switching from above-mentioned the 1st state to above-mentioned the 2nd state and switching from above-mentioned the 2nd state to above-mentioned the 1st state, carry out for non-conduction state jointly by above-mentioned the 3rd thyristor and above-mentioned the 4th thyristor
The 1st electroplates and to use electrode, by the 3rd direct current reactance coil be connected to the above-mentioned the 3rd and the interlinkage of the 4th thyristor on,
The 1st capacitor is connected between above-mentioned positive rectification output end and the above-mentioned neutral point,
The 2nd capacitor is connected between above-mentioned negative rectifier lead-out terminal and the above-mentioned neutral point,
Electrode is used in the 2nd plating, is connected on the above-mentioned neutral point by the 4th direct current reactance coil,
The 3rd diode, its negative electrode connect above-mentioned positive rectification output end, and anode connects above-mentioned positive step-down lead-out terminal,
The 4th diode, its anode connect above-mentioned negative rectifier lead-out terminal, and negative electrode connects above-mentioned negative step-down lead-out terminal,
The 5th diode, its anode be connected to the above-mentioned the 3rd and the interlinkage of the 4th thyristor on, negative electrode connects above-mentioned positive step-down lead-out terminal,
The 6th diode, its anode connect above-mentioned negative step-down lead-out terminal, negative electrode be connected to the above-mentioned the 3rd and the interlinkage of the 4th thyristor on.
2. electroplating supply unit according to claim 1, wherein above-mentioned plating is provided with two groups with power supply unit, and the full-wave rectifying circuit and the above-mentioned three-phase alternating-current supply of each group are connected in parallel.
3. electroplating supply unit according to claim 1, wherein, the buck chopper device of above-mentioned positive polarity is arranged on the face of double-sided printed-circuit board, and the buck chopper device of above-mentioned negative polarity is arranged on the another side of above-mentioned double-sided printed-circuit board.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB031585884A CN100420139C (en) | 2003-09-19 | 2003-09-19 | Electroplate supply unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031585884A CN100420139C (en) | 2003-09-19 | 2003-09-19 | Electroplate supply unit |
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| CN1599222A CN1599222A (en) | 2005-03-23 |
| CN100420139C true CN100420139C (en) | 2008-09-17 |
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| CN104953861B (en) * | 2014-03-31 | 2017-06-23 | 力博特公司 | A kind of power converter circuit |
| US11492722B2 (en) * | 2016-12-02 | 2022-11-08 | Sony Semiconductor Solutions Corporation | Semiconductor apparatus and potential measuring apparatus |
| CN107742917B (en) * | 2017-09-28 | 2020-04-03 | 武汉理工大学 | Three-phase PFC (Power factor correction) rectifying device with voltage boosting and reducing functions for high-power charging pile of electric automobile and control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001298956A (en) * | 2000-04-12 | 2001-10-26 | Fuji Electric Co Ltd | Induction heating power supply |
| JP2002112555A (en) * | 2000-09-27 | 2002-04-12 | Matsushita Electric Works Ltd | Inverter |
| JP2002165438A (en) * | 2000-11-28 | 2002-06-07 | Meidensha Corp | High-frequency power supply for welding seam welded steel pipe |
| CN1402419A (en) * | 2001-08-17 | 2003-03-12 | 株式会社三社电机制作所 | Electroplating supply unit |
-
2003
- 2003-09-19 CN CNB031585884A patent/CN100420139C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001298956A (en) * | 2000-04-12 | 2001-10-26 | Fuji Electric Co Ltd | Induction heating power supply |
| JP2002112555A (en) * | 2000-09-27 | 2002-04-12 | Matsushita Electric Works Ltd | Inverter |
| JP2002165438A (en) * | 2000-11-28 | 2002-06-07 | Meidensha Corp | High-frequency power supply for welding seam welded steel pipe |
| CN1402419A (en) * | 2001-08-17 | 2003-03-12 | 株式会社三社电机制作所 | Electroplating supply unit |
Also Published As
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|---|---|
| CN1599222A (en) | 2005-03-23 |
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