CN2255119Y - Contravariant power supply sepcial for food cold storage cart - Google Patents
Contravariant power supply sepcial for food cold storage cart Download PDFInfo
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- CN2255119Y CN2255119Y CN 96205146 CN96205146U CN2255119Y CN 2255119 Y CN2255119 Y CN 2255119Y CN 96205146 CN96205146 CN 96205146 CN 96205146 U CN96205146 U CN 96205146U CN 2255119 Y CN2255119 Y CN 2255119Y
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Abstract
The utility model relates to a power supply special for food cold storage carts of railways, which has the aim of developing a quiescent contravariant power supply which can be suitable for long-term work in high temperature environment and for low power factor inductive load, and therefore, on the basis of the existing inverters, an under-voltage and an overvoltage protection circuits, a start-up buffer circuit and a multiplex overvoltage absorber circuit are arranged; a special transformer winding multilayer segmental structure and a heat dissipation technique in which natural cooling and forced air cooling are parallel are used.
Description
The utility model relates to the dedicated power supply apparatus on a kind of rail truck, particularly, relates to mechanical thermal insulation car and mechanical refrigeration car special inverter device.
Because the development of economy and railway transport undertaking, more and more need to utilize mechanical thermal insulation car or mechanical refrigeration car to transport to another remote area the special product in an area, for example, special products such as the grape in Xinjiang, "Hami" melon are transported to the coastal outlet in Guangdong or supply each big city.This car is longer running time, often reach tens days for a long time, sometimes need rest on wild and uninhabited desert region for a long time, the not only safety that therefore requires that an energy uses continuously for a long time under hot conditions but also reliably AC power as the communication apparatus on the car, work instrument, living provides stable power supply with equipment such as refrigerator, television set etc.This power supply needs bigger power, the AC power that is used for rail truck in the prior art is that the employing diesel engine is the alternating current generating sets of power, not only volume is big, noise big for this power supply, pollution is arranged, and can not be in the medium-term and long-term work of harsh climate environment, they can not be applicable to such use.Though common inverter volume is little, noise is little, pollution-free, but anti-overvoltage, conveyance capacity are poor, can not be used to the inductive load power supply that resembles the such low power factor of refrigerator, otherwise can cause power supply to damage, and common inverter can not be for a long time in desert high temperature district work.
Therefore, the utility model is in order to overcome the shortcoming of above-mentioned prior art, its purpose is to provide a kind of organizational security car and/or special-purpose AC power of cooling vehicle of being suitable for, not only volume is little, noise is low for it, pollution-free, and can be in the medium-term and long-term work of megathermal climate environment, and the inductive load of can the object refrigerator such low power factor be reliably powered.
To achieve these goals; according to the utility model; a kind of organizational security/cooling vehicle special inverter device has been proposed; it is substantially by start-up circuit; drive circuit; pulse amplifying circuit; main switch circuit and transformer are electrically connected composition mutually with this order; by storage battery power supply output AC 220V voltage; it is characterized in that: this supply unit also comprises fast protection circuit; under-voltage protecting circuit; overvoltage crowbar; overpressure absorbing circuit; start buffer circuit; synthetic circuit; power supply and potential circuit; AC voltage-stabilizing link and current limliting link; wherein; under-voltage protecting circuit is connected with the storage battery output voltage through fast protection circuit with the input of overvoltage crowbar; the output of under-voltage protecting circuit and overvoltage crowbar respectively with first of synthetic circuit; second input is connected; the output of synthetic circuit is connected to the first input end of drive circuit; the input that starts buffer circuit is connected with the output of under-voltage protecting circuit; its output is connected with the 3rd input of synthetic circuit; power supply is connected with one limit output voltage of transformer with the input of voltage detecting circuit; its output is connected as the low-tension supply of above-mentioned each circuit and with AC voltage-stabilizing link input; AC voltage-stabilizing link output and drive circuit second; the 3rd input is connected; the input of current limliting link is connected with the current circuit of main switch circuit; its output is connected with the four-input terminal of drive circuit; overvoltage absorbs circuit and is connected with main switch circuit; and this supply unit also has a ventilation blower, and it is connected with the alternating current 220V voltage of transformer output.
According to a favourable configuration of the present utility model, wherein overvoltage absorbs circuit and absorbs circuit by the high frequency absorption circuit on the collector and emitter that is connected in parallel on the high-power switching transistor in the main switch circuit, intermediate frequency and be connected low frequency between transformer winding two ends, former limit and the ground and absorb circuit and form.
According to another favourable configuration of the present utility model, this supply unit also comprises the cooling segment of but partly being made up of side by side cooling part certainly and forced air cooling, the aluminium section bar radiator that wherein comprises very good heat transfer characteristics from the cooling part, high-power switching transistor is radiator and the distinct high power device of electrode, the radiator of device and the contact portion of radiator scribble heat-conducting silicone grease and are fastened on the radiator, radiator is installed on the case backboard, radiator have when no forced air cooling also can the assurance device operate as normal enough big area of dissipation; Forced air cooling but part comprises the ventilation blower that is installed on the cabinet right plate, on the cabinet left plate, be provided with a plurality of air inlet ventilations hole, ventilation blower is by the power supply of inversion alternating current 220V power supply and from the outside exhausting of cabinet, and ventilation blower has the electrical power that also can make the high-power switch device operate as normal under no radiator situation.
According to another favourable configuration of the present utility model, Transformer Winding adopts the multilayer segmental structure, that is: former limit winding is divided into four coils, inferior limit winding also is divided into four coils, they respectively coiled be contained in two line bags on the C sections core, the ground floor of first and second line bag is respectively former limit first, second coil, the second layer is respectively first of time limit, second coil, the 3rd layer is respectively the 3rd of former limit, the 4th coil, the 4th layer is respectively the 3rd of time limit, the 4th coil, former limit winding is by former limit first, the 4th, second, the order of tertiary coil is in series, be the winding input end to end, the tie point of the 4th and second coil is a centre tap, and inferior limit winding is limit first in due order, the 4th, second, the order of tertiary coil is connected, and is the winding output end to end.
Owing to adopted the supply unit of the utility model said structure, wherein, under-voltage, overvoltage crowbar has prevented from respectively to damage storage battery and overvoltage damage inverter because of overdischarge.The starting buffer circuit has avoided the transformer of inverter to begin the identical former limit short circuit that causes with remanence direction of flash magnetization direction because of starting, thereby prevents the damage of high-power semiconductor switch device because of second breakdown.Overpressure absorbing circuit has adopted multiple absorption portion, has absorbed the overvoltage that may be caused by the switch and the reactive current of switching device fully, makes supply unit can adapt to the work of the inductive load that resembles the such low power factor of refrigerator.Transformer portion is owing to adopted the special winding of multilayer segmental structure, therefore make symmetrical configuration, the compactness of Transformer Winding, make the leakage inductance of transformer reduce to minimum, make the switch overvoltage of inverter reduce to minimum thus, make reliable operation, and improved the efficient of power supply.Owing to adopted the dual-cooled structure of natural cooling and forced air cooling, even can reach in desert region sunlight direct projection under 50-60 ℃ the ambient temperature, under the situation of a large amount of heats that shed such as thermal car Diesel engine, also can guarantee the heat radiation of supply unit reliably, high power device etc. can be worked reliably.Not only volume is little, noise is low for a kind of supply unit like this, pollution-free, and realized can be in the medium-term and long-term work of megathermal climate environment, and can the object refrigerator etc. the inductive load of low power factor power reliably.Thereby realized the purpose of this utility model well.
For other architectural feature and advantage to the utility model supply unit are understood better, be that preferred embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.Accompanying drawing is:
Fig. 1 is the summary outward appearance perspective view according to organizational security of the present utility model/embodiment of cooling vehicle special inverter device;
Fig. 2 is the schematic diagram of transformer winding structure in the foregoing description;
Fig. 3 is the circuit block diagram of the supply unit of this embodiment;
Fig. 4 is the detailed circuit diagram according to a preferred embodiment of the utility model.
By the circuit block diagram among Fig. 3 as seen; organizational security of the present utility model/cooling vehicle special inverter of this embodiment removes general inverter and is provided with the start-up circuit 20 that is electrically connected mutually successively; drive circuit 21; pulse amplifying circuit 22; beyond main switch circuit 23 and the transformer 24; also comprise: fast protection circuit 25; under-voltage protecting circuit 26; overvoltage crowbar 27, overpressure absorbing circuit 28 starts buffer circuit 29; synthetic circuit 30; power supply and voltage detecting circuit 31, AC voltage-stabilizing link 32 and current limliting link 33, and a ventilation blower 34.Annexation between these circuit no longer repeats here to have described in front.
Referring to Fig. 4; it is the detailed circuit diagram of a preferred embodiment of the utility model; when mains switch K is closed; electric current is at first by automatic air circuit breaker K and quick insurance Fu; the fast protection circuit 25 supply start-up circuits 20 that series connection back and sustained diode 1 are in parallel and form; start-up circuit 20 is by transistor T1; voltage-stabiliser tube DW and diode D2 form; voltage-stabiliser tube is connected between the base stage and ground of transistor T 1; the anode of diode D2 is connected with the emitter of this pipe T1; the collector electrode of this pipe T1 is connected with the output KA of fast protection circuit 20 by resistance R 14; the base stage of this pipe T1 also is connected with this anode by resistance R 13; the output voltage of start-up circuit 20 is about 12V, and it is powered to drive circuit 21 and pulse amplifying circuit 22 via the anode of diode D2; drive circuit is made of pulse-width modulation (PWM) integrated circuit 1524; it obtains the 12V direct voltage from 15 pin; from 16 pin output 5V high accuracy burning voltage, use for other circuit.
Under-voltage protecting circuit 26 is made up of operational amplifier A 2, and its in-phase input end 12 is connected with the output KA of fast protection circuit 25 through resistance R 16, and its inverting input 13 is connected with above-mentioned 5V voltage through resistance R 19.When the voltage of output KA 〉=42V, the output 14 output high potentials of amplifier A2; When the voltage of this end KA＜42V; amplifier A2 upset; its output 14 output electronegative potentials; this electronegative potential is that 9 pin of PWM integrated circuit 1524 are connected by the diode D31 in the synthetic circuit 30 and drive circuit; make this circuit 1524 stop to export pulse; thereby whole supply unit is quit work, protect storage battery thus in order to avoid overdischarge.
Start shipment the charging circuit that buffer circuit 29 is made up of resistance R 21 and capacitor C 16 and be connected on this resistance, the electric capacity tie point and the operational amplifier A 3 that is connected into negative feedback mode is formed, this circuit output end is that the diode D33 of output 1 in synthetic circuit 30 of amplifier A3 is connected with 9 pin of pwm circuit 1524.After the power turn-on K switch, because the delayed action of charging circuit time constant and negative-feedback circuit is slowly risen output end voltage, thereby the conduction ratio of pwm circuit 1524 output pulses is risen gradually, thereby the electric current of the main switch circuit of being made up of switching transistor T6, T7, T8, T9 and transformer TR is risen gradually.The transformer former limit short circuit that the flash magnetization direction big magnetizing current identical with taking advantage of magnetic direction causes when so just having avoided because of the startup beginning, thus the high-power semiconductor switch device protected reliably.
Pulse amplifying circuit is made up of transistor T2, T3, T4, T5 substantially, main switch circuit by the former limit of the middle odd test winding of crystal switch pipe T6-T9 transformer TR connect pull in the odd test inverter circuit, this part is similar to the inverter of prior art, repeats no more.
Overvoltage absorbs the Key Circuit that circuit 28 provides reliability.As everyone knows, the refrigerator starting power is more than seven times of rated power, the compressor for refrigeration power factor is about 0.55, and be that the input power of 100 watts compressor inversion device is for power: 100 * 7/0.55 ≈ 1273VA, input current of inverter is: 1273VA/48V=26.5A.Because when main switch circuit turn-offs, the reactive current of equivalent just flows to and absorbs circuit, otherwise can cause very big overvoltage directly to puncture high-power switch device.Design multiple absorption circuit in order fully to absorb overvoltage, adopted triple absorption circuit in this embodiment, reached splendid assimilation effect.
First heavily is the high frequency absorption circuit, promptly capacitor C 8, C9 they be in parallel with the collector and emitter of high-power switching transistor T6, T8 respectively;
Second is that heavily intermediate frequency absorbs electricity, and it is by diode D11 (D12), and resistance R 11 (R12) is in parallel and capacitor C 10 (C11) composition that is in series again, and they also are connected in parallel on the collector and emitter of transistor T 6, T8;
The triple be that low frequency absorbs circuit, it is by diode D9 (D10), resistance R 9 (R10) is in parallel respectively and two diode cathodes serial connection electric capacity (C12) is formed, diode anode meets the former limit of transformer two ends B1 (B2) respectively, capacitor C 12 other end ground connection.
High frequency absorption capacitor C 8, C9 are noninductive electric capacity, are used to absorb overvoltage pulse forward position part.After fast diode D11, D12 open, promptly drop into intermediate frequency and absorb capacitor C 10, C11, it is worth about 1.5-2.2 μ F.Drop into low frequency subsequently and absorb capacitor C 12, capacitance is 39 μ F.
AC voltage-stabilizing link 32 is by resistance R 1-R6 and capacitor C 4, and the voltage stabilizing network that C5 constitutes is formed.This network input be connected as rectifier bridge D2, the D4 of voltage detecting circuit, the rectifier output voltage of D5, D6, the input of this rectifier bridge is connected with the low pressure time limit winding output 15V alternating voltage of transformer TR, two outputs of this network connect 1 pin (anti-phase) and 2 pin (positive) of PWM integrated circuit 1524 respectively, with stablizing of control ac output voltage.Reach the output of cutting off start-up circuit by diode D2 as rectifier bridge D1, the D2 of low-tension supply, the output voltage of D3, D4 in case generation just replaces, above-mentioned each circuit part is powered.
Referring to Fig. 2, a favourable configuration of transformer winding structure in its expression the utility model supply unit.Transformer Winding adopts the multilayer segmental structure, that is: former limit winding is divided into four coil W1-W4, inferior limit winding also is divided into four coil W1 '-W4 ', they respectively coiled be contained in two line bag I on C sections core two stem stems, II, first and second line bag I, the ground floor of II is respectively former limit first, the second coil W1, W2, the second layer is respectively time limit first, the second coil W1 ', W2 ', the 3rd layer is respectively former limit the 3rd, the 4th coil W3, W4, the 4th layer is respectively time limit the 3rd, the 4th coil W3 ', W4 ', former limit winding is by former limit first, the 4th, second, tertiary coil W1, W4, W2, the order of W3 is in series, be winding input B1 end to end, B2, the 4th and second coil W4, the former limit of the tie point of W2 centre tap Kc.The inferior limit winding order of limit first, the 4th, second, third coil W1 ', W4 ', W2 ', W3 ' in due order is in series, and is time limit winding output end to end.Transformer by this way coiling has following advantage: 1, the former limit of transformer, inferior limit are close to greatest extent, and former time the limit lotus root is closed well, reduce transformer leakage inductance, reduce inverter work overvoltage effectively, improve the inverter reliability.2, owing to odd test transformer in the inverter employing, the transformer of making of this technology has symmetrical circuit parameter and magnetic circuit parameters, transformer former limit two winding D.C. resistances and inductance are in full accord, make the positive and negative half-wave output of output AC voltage in full accord, positive and negative half-wave magnetic circuit polarity is also consistent, can avoid producing remanent magnetism and damages inverter.
The outside drawing of an embodiment of organizational security of the present utility model/cooling vehicle special inverter device is illustrated on Fig. 1.It is used for representing the cooling segment of this supply unit, wherein constitute from the aluminium section bar radiator 2 of cooling part by very good heat transfer characteristics, high-power switching transistor T7-T9 adopts radiator and the distinct high power device of electrode, and the radiator of device (not shown) and the contact portion of radiator are coated the good silicone grease of thermal conduction characteristic and be fastened on the radiator.Radiator 2 is installed on the whole back plate of cabinet 1, and radiator 2 has enough big area of dissipation, also can make the supply unit operate as normal when ventilation blower is not worked or is out of order.Forced air cooling but part comprises the ventilation blower 34 that is installed on the cabinet right plate 3, and a plurality of ventilation hole (not shown) that are provided with on cabinet left plate 4.Ventilation blower 34 is by the 220V alternating voltage power supply of this inverter power supply device output, so total the maintenance ventilates during supply unit work, promptly takes away heat from the outside exhausting of cabinet.This motor has enough big electrical power, even do not have under the situation of radiator 2, it also can make switch body operate as normal.Owing to adopted the heat dissipation technology of this dual structure, even in desert region sunlight direct projection can reach 50-60 ℃ even higher thermal car, diesel oil is sent out the machine of advising and is being worked and adding the heat that other electrical equipment sheds, vehicle interior temperature is than under the higher situation of the outer temperature of car, also can guarantee the heat radiation of supply unit reliably, high-power switch device etc. can be worked reliably.
Claims (6)
1; organizational security/cooling vehicle special inverter device; it is substantially by start-up circuit (20); drive circuit (21); pulse amplifying circuit (22); main switch circuit (23) and transformer (24) are electrically connected composition mutually with this order; by storage battery power supply output AC 220V voltage; it is characterized in that: this supply unit also comprises fast protection circuit (25); under-voltage protecting circuit (26); overvoltage crowbar (27); overpressure absorbing circuit (28); start buffer circuit (29); synthetic circuit (30); power supply and voltage detecting circuit (31); AC voltage-stabilizing link (32) and current limliting link (33); wherein under-voltage protecting circuit (26) is connected with the storage battery output voltage through fast protection circuit (25) with the input of overvoltage crowbar (27); their output respectively with first of synthetic circuit (30); second input is connected; the output of synthetic circuit (30) is connected to the first input end of drive circuit (21); the input that starts buffer circuit (29) is connected with the output of under-voltage protecting circuit (26); its output is connected with the 3rd input of synthetic circuit (30); power supply is connected with one limit output voltage of transformer (24) with the input of voltage detecting circuit (31); its output is as the low-tension supply of above-mentioned each circuit; and be connected with AC voltage-stabilizing link (32) input; second of two outputs of AC voltage-stabilizing link (32) and drive circuit (21); the 3rd input is connected; the input of current limliting link (33) is connected with the current circuit of main switch circuit (23); its output is connected with the four-input terminal of drive circuit (21); overpressure absorbing circuit (28) is connected with main switch circuit (23); and this device also has a ventilation blower (34), and it is connected with the alternating current 220V voltage of transformer output.
2, organizational security according to claim 1/cooling vehicle special inverter device is characterized in that: wherein said overvoltage absorbs circuit (28) and absorbs circuit (D11, R11, C10 by high frequency absorption circuit (C8, C9) on the collector and emitter that is connected in parallel on the high-power switching transistor (T6, T8) in the main switch circuit (23) and intermediate frequency; D12, R12, C11), and the low frequency that is connected between transformer (24 (TR)) winding two ends, former limit (B1, B2) and the ground absorbs circuit (D9, R9, D10, R10, C12) composition.
3, organizational security according to claim 1 and 2/cooling vehicle special inverter, it is characterized in that: wherein said under-voltage protecting circuit (26) is made up of operational amplifier (A2), its in-phase input end (12) is connected with the output (KA) of fast protection circuit (25) through resistance (R16), its reversed-phase output (13) is connected with a constant voltage (5V) through resistance (R19), and this circuit output end is the output (14) of operational amplifier (A2); Excess voltage protection (27) is made up of operational amplifier (A4), its inverting input (9) is connected with the output (KA) of fast protection circuit (25) through resistance (R22), normal phase input end (10) is connected with described constant voltage (5V) through resistance (R24), and this circuit output end is the output (8) of operational amplifier (A4); Start the charging circuit that buffer circuit (29) is made up of resistance (R21) and electric capacity (C16) and be connected on this resistance, the electric capacity tie point and the operational amplifier (A3) that is connected into negative feedback mode is formed, the output of this circuit is the output (1) of operational amplifier (A3); Synthetic circuit (30) is made up of three diodes (D31, D32, D33), and their anode is connected to each other as output, and their negative electrode is respectively described first, second and third input.
4, organizational security according to claim 1/cooling vehicle special inverter device is characterized in that: described drive circuit (21) is made of pulse-width modulation (PWM) integrated circuit 1524.
5, organizational security according to claim 1/cooling vehicle special inverter device, it is characterized in that: the winding of wherein said transformer (24 (TR)) adopts the multilayer segmental structure, be that former limit winding is divided into four coils (W1-W4), inferior limit winding also is divided into four coils (W1 '-W4 '), they respectively coiled be contained in two line bag (I that C sections core two cores are pulled on, II), first and second line bag (I, II) ground floor is respectively former limit first, second coil (the W1, W2), the second layer is respectively time limit first, second coil (W1 ', W2 '), the 3rd layer is respectively former limit the 3rd, the 4th coil (W3, W4), the 4th layer is respectively time limit the 3rd, the 4th coil (W3 ', W4 '), former limit winding is by former limit first, the 4th, second, tertiary coil (W1, W4, W2, W3) order is in series, be winding output (B1 end to end, B2), the 4th and second coil (W4, W2) tie point is a former limit centre tap (KC), inferior limit winding is limit first in due order, the 4th, second, tertiary coil (W1 ', W4 ', W2 ', W3 ') order is in series, and is time limit winding output end to end.
6, organizational security according to claim 1/cooling vehicle special inverter device, it is characterized in that: this supply unit also comprises the cooling segment of but partly being made up of side by side cooling part certainly and forced air cooling, the aluminium section bar radiator (2) that wherein comprises very good heat transfer characteristics from the cooling part, high-power switch tube (T7-T9) is led full device for radiator and the distinct high-power half of electrode, the contact portion of the radiator of device and radiator (2) scribbles heat-conducting silicone grease and is fastened on on the hot device (2), radiator (2) is installed on the back plate of cabinet (2), radiator (2) have when no forced air cooling also can the assurance device operate as normal enough big area of dissipation; Forced air cooling but part comprises the ventilation blower (34) that is installed on the cabinet right plate (3), on side plate (4), be provided with a plurality of fresh air inlets in mechanism, ventilation blower (34) is by the power supply of inversion alternating current 220V power supply and from the outside exhausting of cabinet (1), and this ventilation blower has the electrical power that also can make the high-power switch device operate as normal under no heats ink situation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96205146 CN2255119Y (en) | 1996-03-13 | 1996-03-13 | Contravariant power supply sepcial for food cold storage cart |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96205146 CN2255119Y (en) | 1996-03-13 | 1996-03-13 | Contravariant power supply sepcial for food cold storage cart |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2255119Y true CN2255119Y (en) | 1997-05-28 |
Family
ID=33890207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96205146 Expired - Fee Related CN2255119Y (en) | 1996-03-13 | 1996-03-13 | Contravariant power supply sepcial for food cold storage cart |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2255119Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101467283B (en) * | 2006-06-14 | 2011-07-27 | 丰田自动车株式会社 | Power supply device and vehicle |
| CN102291082A (en) * | 2010-06-16 | 2011-12-21 | 日立汽车系统株式会社 | Power conversion device |
-
1996
- 1996-03-13 CN CN 96205146 patent/CN2255119Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101467283B (en) * | 2006-06-14 | 2011-07-27 | 丰田自动车株式会社 | Power supply device and vehicle |
| CN102291082A (en) * | 2010-06-16 | 2011-12-21 | 日立汽车系统株式会社 | Power conversion device |
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| 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 |