CN203671834U - Soft start charging circuit - Google Patents
Soft start charging circuit Download PDFInfo
- Publication number
- CN203671834U CN203671834U CN201320876920.0U CN201320876920U CN203671834U CN 203671834 U CN203671834 U CN 203671834U CN 201320876920 U CN201320876920 U CN 201320876920U CN 203671834 U CN203671834 U CN 203671834U
- Authority
- CN
- China
- Prior art keywords
- relay
- contact
- inductance
- soft start
- charging circuit
- 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.)
- Expired - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims description 14
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 230000018199 S phase Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a soft start charging circuit. The soft start charging circuit comprises a controller, a first relay, a second relay and a charging resistor, wherein the first relay and the second relay are electrically connected with the controller, the first relay comprises two contacts including the first contact and the second contact, a contact of the second relay is connected with the charging resistor in series and then is connected with the first contact in parallel, and the contact of the second relay and the second contact are connected to different input ends of a three-phase alternating-current power source respectively in series. According to the soft start charging circuit, due to the fact that each of the two relays is placed between any two phases on the input side of the three-phase alternating-current power source, operation is easy and convenient, primary surge currents and secondary surge currents are effectively suppressed, impact damage caused by the surge currents to devices of the soft start charging circuit is avoided, and the service life of the relays is prolonged.
Description
Technical field
The utility model relates to charging circuit technical field, particularly relates to a kind of soft start charging circuit.
Background technology
In convertible frequency air-conditioner, conventional startup charging scheme is mainly to realize by the negative pole series resistance while relay in parallel at dc bus.But at charging circuit powered on moment, the resistance in loop and inductance can only surge current suppressions, and be difficult to this current reduction to rational scope.Busbar voltage can only charge to 500V left and right simultaneously, and owing to there is voltage difference, relay adhesive moment can produce secondary surge current.After having charged, relay is connected in major loop for a long time, has the problems such as contact adhesion, life-span be short.And main circuit current is the abundant direct current of harmonic wave, require to select DC relay or the contactor that reliability is high, and the cost of such devices is very high.
Utility model content
In view of the present situation of prior art, the purpose of this utility model is to provide a kind of soft start charging circuit, make this soft start charging circuit can suppress surge current and the secondary surge current in charging process, avoided surge current to impact damage to circuit elements device.
For achieving the above object, the utility model adopts following technical scheme:
A kind of soft start charging circuit, comprises controller;
Also comprise the first relay, the second relay and charging resistor, described the first relay and described the second relay are electrically connected with described controller respectively;
Described the first relay comprises two contacts, is respectively the first contact and the second contact;
The contact of described the second relay is in parallel with described the first contact after connecting with described charging resistor;
The contact of described the second relay and described the second contact are connected on respectively the different inputs of three-phase alternating-current supply.
In an embodiment, the control end of the control end of described the first relay and described the second relay is electrically connected with described controller respectively therein.
In an embodiment, also comprise the first inductance, the second inductance and the 3rd inductance therein;
Described the first inductance, described the second inductance and described the 3rd inductance are connected on respectively the input of described three-phase alternating-current supply.
In an embodiment, also comprise rectification module therein;
One end of described the first inductance connects described three-phase alternating-current supply, and the other end of described the first inductance connects described rectification module;
Described the second inductance is connected behind described the second contact and is electrically connected with described rectification module, and described the 3rd inductance is connected successively after the contact of described the second relay and described charging resistor and is electrically connected with described rectification module.
In an embodiment, also comprise storage capacitor therein;
Described storage capacitor is connected in parallel on the output of described rectification module.
The beneficial effects of the utility model are:
Soft start charging circuit of the present utility model, by two relays being placed on respectively to input side any two alternate of three-phase alternating-current supply, only need to access single phase poaer supply can complete control, simple to operation.And surge current and secondary surge current, the impact failure of having avoided surge current to cause circuit devcie are effectively suppressed.Meanwhile, relay is placed on to the input side of AC power, has avoided relay to be connected on for a long time the situation of the contact adhesion producing in circuit, extended the service life of relay.
Accompanying drawing explanation
Fig. 1 is the controlling party block diagram of soft start charging circuit one embodiment of the present utility model;
Fig. 2 is the flow chart of the control method of soft start charging circuit of the present utility model.
The specific embodiment
In order to make the technical solution of the utility model clearer, below in conjunction with accompanying drawing, soft start charging circuit of the present utility model is described in further detail.Should be appreciated that specific embodiment described herein is only in order to explain the utility model and to be not used in restriction the utility model.
Be illustrated in figure 1 the controlling party block diagram of soft start charging circuit one embodiment of the present utility model.This soft start charging circuit comprises controller, the first relay K 1, the second relay K 2, charging resistor R, the first inductance L 1, the second inductance L 2, the 3rd inductance L 3, storage capacitor C and rectification module.
Wherein, the first relay K 1 is single-pole double throw relay, comprises control end and two contacts, and two contacts are respectively the first contact and the second contact.The second relay K 2 is single-pole single-throw(SPST relay, comprises control end and a contact, in parallel with the first contact of the first relay K 1 after the contact serial connection charge resistance R of the second relay K 2.The contact of the second relay K 2 and the second contact of the first relay K 1 are connected on the different inputs of three-phase alternating-current supply.
The input of the T phase being connected at three-phase alternating-current supply after the contact serial connection charge resistance R of the second relay K 2 in the present embodiment.The first contact of the first relay K 1 is connected in parallel on the second relay K 2 after series connection and the two ends of charging resistor R, and one end of the first contact is connected to the contact of the second relay K 2, and the other end of the first contact connects charging resistor R.The second contact of the first relay K 1 is connected on the input of the S phase of AC power.And the control end of the first relay K 1 and the second relay K 2 is electrically connected with controller respectively, adhesive or the disconnection of controller control the first relay K 1 and the second relay K 2.
In other embodiments, also can be connected to the input of the R phase of three-phase alternating-current supply after the contact serial connection charge resistance R of the second relay K 2, the second contact of the first relay K 1 can be connected on the input of the S/T phase of three-phase alternating-current supply.The input that also can be connected to the S phase of three-phase alternating-current supply after the contact serial connection charge resistance R of the second relay K 2, the second contact of the first relay K 1 can be connected on the input of the R/T phase of three-phase alternating-current supply.
In the present embodiment, the first relay and the second relay are placed on to the input of three-phase alternating-current supply, pressure reduction when relay contact adhesion is generally at 220V, much smaller than recommendation 277V, make extend 60% the service life of relay, and circuit structure is simple, device is few, and the reliability of this soft start charging circuit is also improved.
As a kind of embodiment, the first inductance L 1, the second inductance L 2 and the 3rd inductance L 3 are connected on respectively the input of three-phase alternating-current supply.In the present embodiment, the first inductance L 1 is connected on the input of the R phase of three-phase alternating-current supply.The second inductance is connected on the input of three-phase alternating-current supply S phase, and the 3rd inductance L 3 is connected on the input of three-phase alternating-current supply T phase.In other embodiments, the position of the first inductance L 1, the second inductance L 2 and the 3rd inductance L 3 can be exchanged.
Preferably, one end of the first inductance L 1 is connected to rectification module, and the other end connects the R phase of three-phase alternating-current supply.The second inductance L 2 is connected behind the second contact of the first relay K 1 and is connected to rectification module, and one end of the second contact is connected to rectification module, and the other end of the second contact connects the second inductance.The 3rd inductance L 3 is connected successively after the contact of the second relay K 2 and charging resistor R and is connected to rectification module, and one end of charging resistor R is connected to rectification module, and the other end of charging resistor R connects the contact of the second relay K 2.
Preferably, storage capacitor C is connected in parallel on the output of rectification module.In other embodiments, the quantity of storage capacitor C can be multiple.Multiple storage capacitors form energy capacitance set, and parallel with one another between multiple storage capacitor.
The course of work of soft start charging circuit of the present utility model is as follows:
After powering on, controller control the second relay K 2 adhesives, the R phase of three-phase alternating-current supply and T communicate and overcharge resistance R, the 3rd inductance L 3 and the first inductance L 1 to storage capacitor C charging.After powering on, can charge by the R Stored energy electric capacity in three-phase alternating-current supply, complete control procedure, simple to operation.Meanwhile, effectively avoid the generation of the surge current of the second relay adhesive moment, the components and parts in circuit have been played to the effect of protection.
In the time that controller detects that the DC bus-bar voltage of the output of rectification module reaches the predeterminated voltage of controller, controller control the first relay K 1 adhesive.Now, the contact of the second relay K 2 and charging resistor R are bypassed, and controller control the second relay K 2 disconnects.Like this, three-phase alternating-current supply is directly given storage capacitor C charging by the first relay K 1, and controller starts normal work, completes whole soft start-up process.Avoid like this generation of the secondary surge current of relay adhesive moment, thereby played the effect of the components and parts in holding circuit.
As shown in Figure 2, the control method of above-mentioned soft start charging circuit comprises the steps:
S1, controller control the second relay adhesive, three-phase alternating-current supply charges to storage capacitor;
S2, judge whether the DC bus-bar voltage of the output of rectification module is greater than the predeterminated voltage of controller;
S21, if so, the first relay adhesive, disconnect the second relay after time delay a period of time;
S22, if not, disconnects the second relay.
More preferably, before step S1, also comprise step:
S0, judge whether controller breaks down; If so, disconnect the second relay; If not, enter step S1.
More preferably, after step S22, also comprise the steps:
The number of times that S3, statistics the second relay disconnect;
S4, judge second relay disconnect number of times whether be 1 time, if so, enter step S0; If not, carry out the trouble shooting of soft start charging circuit.
After controller powers on, first detect controller self and whether break down.If self breaks down controller, keep the off-state of the second relay, controller report fault.If controller is normally worked, wait for after 2s controller control the second relay adhesive.After the second relay adhesive, three-phase alternating-current supply charges to storage capacitor by charging resistor, the first inductance and the 3rd inductance.After time delay 3s, whether the DC bus-bar voltage Vdc of the output of controller detection rectification module reaches the predeterminated voltage Vo of controller, if so, be Vdc > Vo, controller control the first relay adhesive, then after time delay 2s, controller control the second relay disconnects.Like this, three-phase alternating-current supply charges to storage capacitor by the first relay and three inductance, completes whole soft start-up process.
If the DC bus-bar voltage Vdc of rectification module does not reach the predeterminated voltage Vo of controller, i.e. Vdc < Vo, controller control the second relay disconnects.Meanwhile, the number of times that controller disconnects the second relay is added up.Then, controller judges whether the number of times that the second relay disconnects is 1 time.In the time that the number of times of the second relay disconnection is 1 time, continues to detect controller self and whether have fault.In the time that the number of times of the second relay disconnection is greater than 1 time, illustrate that charge circuit exists fault, carry out the trouble shooting of soft start charging circuit.
Soft start charging circuit of the present utility model, by two relays being placed on respectively to input side any two alternate of three-phase alternating-current supply, only need to access single phase poaer supply can complete control, simple to operation.And surge current and secondary surge current, the impact failure of having avoided surge current to cause circuit devcie are effectively suppressed.Meanwhile, relay is placed on to the input side of AC power, has avoided relay to be connected on for a long time the situation of the contact adhesion producing in circuit, extended the service life of relay.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (5)
1. a soft start charging circuit, comprises controller, it is characterized in that:
Also comprise the first relay, the second relay and charging resistor, described the first relay and described the second relay are electrically connected with described controller respectively;
Described the first relay comprises two contacts, is respectively the first contact and the second contact;
The contact of described the second relay is in parallel with described the first contact after connecting with described charging resistor;
The contact of described the second relay and described the second contact are connected on respectively the different inputs of three-phase alternating-current supply.
2. soft start charging circuit according to claim 1, is characterized in that:
The control end of the control end of described the first relay and described the second relay is electrically connected with described controller respectively.
3. soft start charging circuit according to claim 2, is characterized in that:
Also comprise the first inductance, the second inductance and the 3rd inductance;
Described the first inductance, described the second inductance and described the 3rd inductance are connected on respectively the input of described three-phase alternating-current supply.
4. soft start charging circuit according to claim 3, is characterized in that:
Also comprise rectification module;
One end of described the first inductance connects described three-phase alternating-current supply, and the other end of described the first inductance connects described rectification module;
Described the second inductance is connected behind described the second contact and is electrically connected with described rectification module, and described the 3rd inductance is connected successively after the contact of described the second relay and described charging resistor and is electrically connected with described rectification module.
5. soft start charging circuit according to claim 4, is characterized in that:
Also comprise storage capacitor;
Described storage capacitor is connected in parallel on the output of described rectification module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320876920.0U CN203671834U (en) | 2013-12-26 | 2013-12-26 | Soft start charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320876920.0U CN203671834U (en) | 2013-12-26 | 2013-12-26 | Soft start charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203671834U true CN203671834U (en) | 2014-06-25 |
Family
ID=50968123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320876920.0U Expired - Lifetime CN203671834U (en) | 2013-12-26 | 2013-12-26 | Soft start charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203671834U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748288A (en) * | 2013-12-26 | 2015-07-01 | 珠海格力电器股份有限公司 | Soft start charging circuit and control method thereof |
| CN105322854A (en) * | 2015-07-30 | 2016-02-10 | 西子奥的斯电梯有限公司 | Automatic regulation system and method for elevator transformer voltage |
| CN108199446A (en) * | 2018-02-07 | 2018-06-22 | 湖南科技大学 | Circuit and soft start equipment are protected in lithium battery trickle charge |
-
2013
- 2013-12-26 CN CN201320876920.0U patent/CN203671834U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748288A (en) * | 2013-12-26 | 2015-07-01 | 珠海格力电器股份有限公司 | Soft start charging circuit and control method thereof |
| CN104748288B (en) * | 2013-12-26 | 2018-01-19 | 珠海格力电器股份有限公司 | Soft start charging circuit and its control method |
| CN105322854A (en) * | 2015-07-30 | 2016-02-10 | 西子奥的斯电梯有限公司 | Automatic regulation system and method for elevator transformer voltage |
| CN108199446A (en) * | 2018-02-07 | 2018-06-22 | 湖南科技大学 | Circuit and soft start equipment are protected in lithium battery trickle charge |
| CN108199446B (en) * | 2018-02-07 | 2019-10-11 | 佛山科学技术学院 | Circuit and soft start equipment are protected in lithium battery trickle charge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104065157B (en) | Uninterruptible power supply with improved power supply reliability | |
| US9882385B2 (en) | System for starting large-scale power load in micro-grid | |
| CN104539042B (en) | A kind of uninterruptible power system | |
| CN104748288B (en) | Soft start charging circuit and its control method | |
| CN103683468B (en) | Power-supply system and the control method of power-supply system | |
| CN201752075U (en) | Charge-discharge and energy storage circuit | |
| CN103227610B (en) | Circuit for controlling motor and automobile | |
| CN203671834U (en) | Soft start charging circuit | |
| CN102629776A (en) | Auxiliary power supply system for power converter and method | |
| CN103746553A (en) | High-voltage DC-DC (Direct Current to Direct Current) convertor and control method thereof | |
| CN103762630B (en) | A kind of rectification circuit and ups system thereof | |
| CN203377777U (en) | A soft start circuit of an auxiliary power supply | |
| CN202906774U (en) | High-power photovoltaic inverter with automatic power-off auxiliary power supply circuit | |
| CN203225578U (en) | A power transmission line induction energy acquiring power supply apparatus with a high redundancy feature | |
| CN112564508B (en) | Power module online replacement control device and method for power electronic transformer system | |
| CN205791773U (en) | Non-interrupted power supply system | |
| CN105576813A (en) | Uninterrupted power source (UPS) and storage battery pack articulated circuit thereof | |
| CN101707392B (en) | Alternating and direct current isolation control method of uninterruptible power supply and circuit | |
| CN102868213B (en) | Backup type uninterrupted power supply is without time delay synchronous switching circuit and method | |
| WO2022233147A1 (en) | Charging protection circuit module and related product | |
| CN205336097U (en) | Be applied to soft start circuit among single -phase invertion power supply of low -power | |
| CN204442002U (en) | A kind of double dynamical power supply automatic converting device | |
| CN105337325B (en) | A kind of UPS circuit | |
| CN103683978B (en) | A kind of photovoltaic DC-to-AC converter electric power system and method | |
| CN108199572A (en) | A kind of frequency converter and its circuit breaking protective system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140625 |
|
| CX01 | Expiry of patent term |