CN205123573U - Non - linear load start control system of high frequency dc -to -ac converter - Google Patents
Non - linear load start control system of high frequency dc -to -ac converter Download PDFInfo
- Publication number
- CN205123573U CN205123573U CN201520961915.9U CN201520961915U CN205123573U CN 205123573 U CN205123573 U CN 205123573U CN 201520961915 U CN201520961915 U CN 201520961915U CN 205123573 U CN205123573 U CN 205123573U
- Authority
- CN
- China
- Prior art keywords
- current
- inverter
- controller
- control system
- output
- 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.)
- Active
Links
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model discloses a non - linear load start control system of high frequency dc -to -ac converter, including power module, dc -to -ac converter, contravariant current sample device, signal conversion equipment, controller, timer, current limiting device and non - linear load, power module is used for for the mains power supply, and power module is connected with the dc -to -ac converter, the dc -to -ac converter is connected with the input of contravariant current sample device, the output and the current limiting device of controller respectively, contravariant current sample device is used for the data of real -time sampling inverter output electric current and voltage, and the output of contravariant current sample device is connected with signal conversion equipment's input, it is data signal that signal conversion equipment is used for analog signal transition. The utility model discloses can protect the circuit according to the situation of load, avoid when inserting non - linear load, instantaneous current can surpass the protection threshold values, and the dc -to -ac converter can start overload or short -circuit protection, simple structure, and the cost is lower.
Description
Technical field
The present invention relates to inverter control system technical field, particularly relate to a kind of high-frequency inverter nonlinear load and start control system.
Background technology
High-frequency inverter because of its volume little, high and the price advantage of efficiency becomes the main flow on civilian power supply market, low-voltage DC is first rectified into about 400V direct voltage through high frequency transformer boosting by high-frequency inverter, another mistake becomes 220V alternating current, this topological structure determines band impact load capacity not as traditional power frequency inverter, the method of usual employing improves power capacity, or increasing inverter bridge power tube electric stress starts refrigerator or air-conditioning, although can normally run in a short time, but long-term start-stop is impacted, accelerate the aging of MOSFET, fault of converter rate is increased, increase power capacity, cost is not calculated, some certain loads, as the non-linear equipment such as air-conditioning or refrigerator, when these loads are in startup moment, its electric current is 5-12 times of rated current, after running once normal, electric current falls after rise rapidly to normal level, inverter generally all has overload and short-circuit protection function, when starting the moment of these loads, output current is uprushed and is understood trigger protection, inverter alarm is caused to be shut down, cannot starting load, therefore, the application scenario of impact load is had at some, as air-conditioning, refrigerator etc., user have selected the not dominant power frequency inverter of price efficiency.
Summary of the invention
Based on the technical problem that background technology exists, the present invention proposes a kind of high-frequency inverter nonlinear load and start control system.
A kind of high-frequency inverter nonlinear load that the present invention proposes starts control system, include power module, inverter, inverter current sampling apparatus, chromacoder, controller, timer, current-limiting apparatus and nonlinear load, described power module is used for for system power supply, and power module is connected with inverter, described inverter respectively with the input of inverter current sampling apparatus, the output of controller is connected with current-limiting apparatus, described inverter current sampling apparatus is used for the data of real-time sampling inverter output current and voltage, and the output of inverter current sampling apparatus is connected with the input of chromacoder, described chromacoder is used for analog signal to be converted to digital signal, and the output of chromacoder is connected with the input of controller, described controller is connected with timer, and the output of controller is connected with current-limiting apparatus, described current-limiting apparatus is used for limiting the electric current in circuit and voltage, circuit is protected, described current-limiting apparatus is connected with nonlinear load.
Preferably, described controller and timer are bi-directionally connected.
Preferably, described current-limiting apparatus includes current-limiting resistance and relay, and current-limiting resistance is in parallel with relay.
Preferably, described relay is electrically connected with the output of controller.
Preferably, described relay is electromagnetic type relay, contactor or solid-state relay, and relay comprises controllable silicon.
Preferably, described current-limiting resistance is cement resistor.
Preferably, described controller is microcontroller.
Preferably, described inverter circuit sampling apparatus is instrument transformer, Hall element or current sampling resistor.
The present invention adopts outlet side to limit power circuit techniques, at conventional high-frequency inverter output, be connected in series a current-limiting resistance, unloaded or be less than 10% nominal load time, controller control relay disconnects, its basis for estimation is the output current of the inverter collected according to inverter current sampling apparatus, when accessing impact load, current-limiting resistance is connected in series in circuit, limit maximum current, avoid triggering overload or short-circuit protection, can normal starting load, after loaded work piece is normal, the output current of the inverter that controller is collected by inverter current sampling apparatus, judge whether it exceedes 10% of rated power, when load is greater than the nominal load of 10%, relay is connected, by current-limiting resistance short circuit, main circuit current passes through from relay, current-limiting resistance is avoided to generate heat, when detecting load and being no more than 10% nominal load, relay disconnects, now, the electric current flow through on current-limiting resistance is very little, the heat that current-limiting resistance produces can blow away by fan in machine in time, little on overall efficiency impact, and after load access certain hour, when the output current of inverter does not still just have a greater change, controller control inverter stops inversion, the present invention can protect circuit according to the situation of load, avoid when accessing nonlinear load, transient current can exceed protection threshold values, inverter can start overload or short-circuit protection, structure is simple, cost is lower.
Accompanying drawing explanation
Fig. 1 is the system schematic of a kind of high-frequency inverter nonlinear load startup control system that the present invention proposes;
Fig. 2 is the circuit diagram of a kind of high-frequency inverter nonlinear load startup control system that the present invention proposes;
Fig. 3 is the schematic flow sheet of a kind of high-frequency inverter nonlinear load startup control system that the present invention proposes.
Embodiment
Below in conjunction with specific embodiment, further explanation is done to the present invention.
Embodiment
With reference to Fig. 1-3, the present embodiment proposes a kind of high-frequency inverter nonlinear load and starts control system, include power module, inverter, inverter current sampling apparatus, chromacoder, controller, timer, current-limiting apparatus and nonlinear load, described power module is used for for system power supply, and power module is connected with inverter, described inverter respectively with the input of inverter current sampling apparatus, the output of controller is connected with current-limiting apparatus, described inverter current sampling apparatus is used for the data of real-time sampling inverter output current and voltage, and the output of inverter current sampling apparatus is connected with the input of chromacoder, described chromacoder is used for analog signal to be converted to digital signal, and the output of chromacoder is connected with the input of controller, described controller is connected with timer, and the output of controller is connected with current-limiting apparatus, described current-limiting apparatus is used for limiting the electric current in circuit and voltage, circuit is protected, described current-limiting apparatus is connected with nonlinear load, the present invention adopts outlet side to limit power circuit techniques, at conventional high-frequency inverter output, be connected in series a current-limiting resistance, unloaded or be less than 10% nominal load time, controller control relay disconnects, its basis for estimation is the output current of the inverter collected according to inverter current sampling apparatus, when accessing impact load, current-limiting resistance is connected in series in circuit, limit maximum current, avoid triggering overload or short-circuit protection, can normal starting load, after loaded work piece is normal, the output current of the inverter that controller is collected by inverter current sampling apparatus, judge whether it exceedes 10% of rated power, when load is greater than the nominal load of 10%, relay is connected, by current-limiting resistance short circuit, main circuit current passes through from relay, current-limiting resistance is avoided to generate heat, when detecting load and being no more than 10% nominal load, relay disconnects, now, the electric current flow through on current-limiting resistance is very little, the heat that current-limiting resistance produces can blow away by fan in machine in time, little on overall efficiency impact, and after load access certain hour, when the output current of inverter does not still just have a greater change, controller control inverter stops inversion, the present invention can protect circuit according to the situation of load, avoid when accessing nonlinear load, transient current can exceed protection threshold values, inverter can start overload or short-circuit protection, structure is simple, cost is lower.
Described controller and timer are bi-directionally connected, described current-limiting apparatus includes current-limiting resistance and relay, and current-limiting resistance is in parallel with relay, described relay is electrically connected with the output of controller, described relay is electromagnetic type relay, contactor or solid-state relay, and relay comprises controllable silicon, described current-limiting resistance is cement resistor, described controller is microcontroller, described inverter circuit sampling apparatus is instrument transformer, Hall element or current sampling resistor, the present invention adopts outlet side to limit power circuit techniques, at conventional high-frequency inverter output, be connected in series a current-limiting resistance, unloaded or be less than 10% nominal load time, controller control relay disconnects, its basis for estimation is the output current of the inverter collected according to inverter current sampling apparatus, when accessing impact load, current-limiting resistance is connected in series in circuit, limit maximum current, avoid triggering overload or short-circuit protection, can normal starting load, after loaded work piece is normal, the output current of the inverter that controller is collected by inverter current sampling apparatus, judge whether it exceedes 10% of rated power, when load is greater than the nominal load of 10%, relay is connected, by current-limiting resistance short circuit, main circuit current passes through from relay, current-limiting resistance is avoided to generate heat, when detecting load and being no more than 10% nominal load, relay disconnects, now, the electric current flow through on current-limiting resistance is very little, the heat that current-limiting resistance produces can blow away by fan in machine in time, little on overall efficiency impact, and after load access certain hour, when the output current of inverter does not still just have a greater change, controller control inverter stops inversion, the present invention can protect circuit according to the situation of load, avoid when accessing nonlinear load, transient current can exceed protection threshold values, inverter can start overload or short-circuit protection, structure is simple, cost is lower.
In use, this device is contained in inverter output end, connect load, when zero load or when being less than 10% load, in current-limiting resistance series connection output loop in this device, when cutting as cold conditions incandescent lamp bulb, refrigerator even load, because of resistance of having connected in circuit, limit maximum current, after these equipment normally work, the adhesive of controller control relay, by current-limiting resistance short circuit, proof load normally runs, and when load still can not normally run within a certain period of time, controller control inverter stops inversion.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (8)
1. a high-frequency inverter nonlinear load starts control system, include power module, inverter, inverter current sampling apparatus, chromacoder, controller, timer, current-limiting apparatus and nonlinear load, it is characterized in that, described power module is used for for system power supply, and power module is connected with inverter, described inverter respectively with the input of inverter current sampling apparatus, the output of controller is connected with current-limiting apparatus, described inverter current sampling apparatus is used for the data of real-time sampling inverter output current and voltage, and the output of inverter current sampling apparatus is connected with the input of chromacoder, described chromacoder is used for analog signal to be converted to digital signal, and the output of chromacoder is connected with the input of controller, described controller is connected with timer, and the output of controller is connected with current-limiting apparatus, described current-limiting apparatus is used for limiting the electric current in circuit and voltage, circuit is protected, described current-limiting apparatus is connected with nonlinear load.
2. a kind of high-frequency inverter nonlinear load according to claim 1 starts control system, and it is characterized in that, described controller and timer are bi-directionally connected.
3. a kind of high-frequency inverter nonlinear load according to claim 1 starts control system, and it is characterized in that, described current-limiting apparatus includes current-limiting resistance and relay, and current-limiting resistance is in parallel with relay.
4. a kind of high-frequency inverter nonlinear load according to claim 3 starts control system, and it is characterized in that, described relay is electrically connected with the output of controller.
5. a kind of high-frequency inverter nonlinear load according to claim 3 starts control system, and it is characterized in that, described relay is electromagnetic type relay, contactor or solid-state relay, and relay comprises controllable silicon.
6. a kind of high-frequency inverter nonlinear load according to claim 3 starts control system, and it is characterized in that, described current-limiting resistance is cement resistor.
7. a kind of high-frequency inverter nonlinear load according to claim 1 starts control system, and it is characterized in that, described controller is microcontroller.
8. a kind of high-frequency inverter nonlinear load according to claim 3 starts control system, and it is characterized in that, described inverter circuit sampling apparatus is instrument transformer, Hall element or current sampling resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520961915.9U CN205123573U (en) | 2015-11-29 | 2015-11-29 | Non - linear load start control system of high frequency dc -to -ac converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520961915.9U CN205123573U (en) | 2015-11-29 | 2015-11-29 | Non - linear load start control system of high frequency dc -to -ac converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205123573U true CN205123573U (en) | 2016-03-30 |
Family
ID=55579144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520961915.9U Active CN205123573U (en) | 2015-11-29 | 2015-11-29 | Non - linear load start control system of high frequency dc -to -ac converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205123573U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450006A (en) * | 2015-11-29 | 2016-03-30 | 天宝电子（惠州）有限公司 | High frequency inverter non-linear load starting control system |
| CN111525681A (en) * | 2020-05-28 | 2020-08-11 | 谢志和 | Self-adaptive multi-capacity inverter system |
-
2015
- 2015-11-29 CN CN201520961915.9U patent/CN205123573U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450006A (en) * | 2015-11-29 | 2016-03-30 | 天宝电子（惠州）有限公司 | High frequency inverter non-linear load starting control system |
| CN111525681A (en) * | 2020-05-28 | 2020-08-11 | 谢志和 | Self-adaptive multi-capacity inverter system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102487188A (en) | Resettable overvoltage and under-voltage protection switch | |
| CN103441569B (en) | A kind of supervising device of line voltage instant jitter and method | |
| CN102412720A (en) | Switching power circuit and power factor correction (PFC) control circuit thereof | |
| CN106463995B (en) | Power supply for an electrical appliance, in particular a battery charger for charging the batteries of an electric vehicle | |
| CN204794060U (en) | Surge current protection circuit and air conditioner supply circuit | |
| CN205123573U (en) | Non - linear load start control system of high frequency dc -to -ac converter | |
| CN203967733U (en) | Without current sample and the overcurrent protective device of bridge APFC system | |
| CN105450006A (en) | High frequency inverter non-linear load starting control system | |
| CN207218244U (en) | A kind of direct current reverse-connection preventing circuit | |
| CN104767275A (en) | Refrigerator frequent power on and power off protection device | |
| CN205319962U (en) | Digital high voltage dc source control system | |
| CN104868457A (en) | IGBT overvoltage protective circuit capable of large-power energy discharge | |
| CN202035203U (en) | Novel electronic ballast capable of resisting surge current | |
| CN204168130U (en) | A kind of interchange inputs soft-start circuit | |
| CN103178495A (en) | Overcurrent protection device for medium-frequency asynchronous motors | |
| CN204190370U (en) | A kind of management of power use device | |
| CN202797896U (en) | Three-phase asynchronous motor open-phase protector | |
| KR101171739B1 (en) | A switch power source cycle by cycle overvoltage protection circuit | |
| CN206620061U (en) | A kind of common DC bus servo drive system | |
| CN205141633U (en) | Idle power consumptive motivation protection circuit | |
| CN201887422U (en) | Self-resetting over-voltage and under-voltage protection switch | |
| CN205037497U (en) | Safe long -life air condition compressor control circuit | |
| CN203840606U (en) | Novel alternating current LED drive power supply device | |
| CN105375748B (en) | A kind of electric dehumidifier driving power circuit | |
| CN211908646U (en) | Input surge-proof circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |