CN2231458Y - Overload protective device for gasoline electric generating set - Google Patents
Overload protective device for gasoline electric generating set Download PDFInfo
- Publication number
- CN2231458Y CN2231458Y CN 95244538 CN95244538U CN2231458Y CN 2231458 Y CN2231458 Y CN 2231458Y CN 95244538 CN95244538 CN 95244538 CN 95244538 U CN95244538 U CN 95244538U CN 2231458 Y CN2231458 Y CN 2231458Y
- Authority
- CN
- China
- Prior art keywords
- resistance
- triode
- current
- inspection leakage
- generating set
- 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 - Fee Related
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- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The utility model relates to an overload protective device for a gasoline electric generating set. The utility model is characterized in that an R1 is connected between a rectifying circuit 1 and an inversion circuit 2; the emitter of an audion BG1 is connected with the current inputting end of the R1; one end of a resistor R2 is connected with the current outputting end of the R1, and the other end is connected with the base of the BG1; resistors R3 and R4 are connected between the collector of the BG1 and the ground; the cathode of a thyristor KG and the anode of the thyristor KG are respectively connected with both ends of the ignition coil L of a gasoline engine; the control electrode of the KG is connected with the contact point of the resistors R3 and R4. The utility model has the advantage that when the gasoline electric generating set is overloaded, the rotary speed of the gasoline engine can be reduced to protect the inversion circuit from being burnt.
Description
The utility model relates to the overload protection device that uses on a kind of generating set.
In the prior art, when put-put drove generator for electricity generation, the alternating current that generator sends caused output voltage and frequency to change because load variations changes petrol engine rotational speed.In order to obtain constant voltage and frequency, generally adopt the method for inversion after the first rectification to obtain stable voltage.After the load of generator becomes greatly, can cause the output current of inverter circuit to increase, very easily burn out the high power valve of inverter circuit.
The purpose of this utility model is to provide a kind of overload protection device, can reduce petrolic rotating speed when load becomes big automatically.
The technical solution of the utility model is: be connected to inspection leakage resistance R1 between the output of rectification circuit and the input of inverter circuit, the emitter of triode BG1 is connected on the current input terminal of inspection leakage resistance R1, one of resistance R 2 terminates at the current output terminal of inspection leakage resistance R1, the other end of R2 is connected on the base stage of triode BG1, be in series with resistance R 3, R4 between the collector electrode of triode BG1 and the power supply ground, the negative electrode of controllable silicon KG and anode are connected across the two ends of petrolic ignition coil L respectively, and the control utmost point of controllable silicon KG is connected on the contact between resistance R 3, the R4.
The utility model compared with prior art has following advantage:
(1). what rectification circuit was exported is direct current, and the voltage drop on the inspection leakage resistance R1 is proportional with the electric current that flows through this resistance, so comparatively accurate by the load of inspection leakage resistance R1 detection generator.
(2). when load is excessive when causing voltage drop on the R1 to raise, triode BG1 conducting makes controllable silicon KG conducting; petrolic ignition coil is made petrolic rotating speed descend by short circuit, and the output voltage of generator descends; output current also descends, the protection inverter circuit.
The utility model will be further described below in conjunction with drawings and Examples:
Accompanying drawing is circuit theory diagrams of the present utility model.
Embodiment: referring to accompanying drawing, be connected to inspection leakage resistance R1 between the input of the output of rectification circuit 1 and inverter circuit 2, the emitter of triode BG1 is connected on the current input terminal of inspection leakage resistance R1, one of resistance R 2 terminates at the current output terminal of inspection leakage resistance R1, the other end of R2 is connected on the base stage of triode BG1, be in series with resistance R 3, R4 between the collector electrode of triode BG1 and the power supply ground, the negative electrode of controllable silicon KG and anode are connected across the two ends of petrolic ignition coil L respectively, and the control utmost point of controllable silicon KG is connected on the contact between resistance R 3, the R4.Also be in series with light-emitting diode D1 between the collector electrode of described triode BG1 and the resistance R 3.The sense of current of inspection leakage resistance R1 is for from left to right in the patent figures, so the left end of R1 is a current input terminal, the right-hand member of R1 is a current output terminal.When load just often, flow through the inspection leakage resistance electric current in the pressure drop of R1 two ends less than 0.7 volt, so BG1 end, Ignition Coils of Gasoline Engines L operate as normal, its rotating speed is also normal.When overload, the electric current that flows through the inspection leakage resistance increases, also increase in the pressure drop of R1 two ends, when voltage during greater than 0.7 volt, BG1 is by by changing conducting into, the alarm of D1 led lighting, controllable silicon KG conducting hot wire coil L, igniting stops, and petrol engine rotational speed descends, and output voltage and output current are also descended; The R1 both end voltage is fallen and less than 0.7 volt, BG1 ends, the controllable silicon grid voltage becomes 0, and ignition coil makes controllable silicon KG turn-off when crossing 0, and ignition coil recovers operate as normal, the pressure drop of inspection leakage resistance increases, BG1 is conducting again ...., repeat to make gasoline engine to be at a slow speed under the state like this, output voltage descends, and output current is less than rated current.Thereby protected the inverter circuit high power valve can not burnt out, after overload shed, gasoline engine recovered operate as normal automatically.Inspection leakage resistance R1 in this patent also can be arranged at other position, as long as can detect load current.
Claims (2)
1. gasoline engine generator group overload protection device; it is characterized in that: be connected to inspection leakage resistance R1 between the input of the output of rectification circuit 1 and inverter circuit 2; the emitter of triode BG1 is connected on the current input terminal of inspection leakage resistance R1; one of resistance R 2 terminates at the current output terminal of inspection leakage resistance R1; the other end of R2 is connected on the base stage of triode BG1; be in series with resistance R 3 between the collector electrode of triode BG1 and the power supply ground; R4; the negative electrode of controllable silicon KG and anode are connected across the two ends of petrolic ignition coil L respectively, and the control utmost point of controllable silicon KG is connected on resistance R 3; contact between the R4.
2. gasoline engine generator group overload protection device according to claim 1 is characterized in that: also be in series with light-emitting diode D1 between the collector electrode of described triode BG1 and the resistance R 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95244538 CN2231458Y (en) | 1995-08-10 | 1995-08-10 | Overload protective device for gasoline electric generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95244538 CN2231458Y (en) | 1995-08-10 | 1995-08-10 | Overload protective device for gasoline electric generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2231458Y true CN2231458Y (en) | 1996-07-17 |
Family
ID=33884902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95244538 Expired - Fee Related CN2231458Y (en) | 1995-08-10 | 1995-08-10 | Overload protective device for gasoline electric generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2231458Y (en) |
-
1995
- 1995-08-10 CN CN 95244538 patent/CN2231458Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |