CN2686912Y - AC-DC converting circuit for railway locomotive - Google Patents
AC-DC converting circuit for railway locomotive Download PDFInfo
- Publication number
- CN2686912Y CN2686912Y CN 200420041633 CN200420041633U CN2686912Y CN 2686912 Y CN2686912 Y CN 2686912Y CN 200420041633 CN200420041633 CN 200420041633 CN 200420041633 U CN200420041633 U CN 200420041633U CN 2686912 Y CN2686912 Y CN 2686912Y
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- thyristor
- electrically connected
- equidirectional
- bridge circuit
- circuit
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Abstract
The utility model discloses a power source, in particular to an AC-DC converting circuit which can be widely adopted by railway locomotives. Both ends of each thyristor and each rectifying tube are provided with resistors and capacitors which are connected in parallel, and a RC commutation absorption return circuit is formed by the resistors and the capacitors. The bridge arm which is formed by each thyristor is provided with quick-break fuses in series. The quick-break fuses (F1-F6) are in RSG shapes. The AC-DC converting circuit for railway locomotives of the utility model is used to enhance the reliability without enlarging the volume or increasing the cost.
Description
Affiliated technical field: the utility model belongs to a kind of power supply, particularly is widely used in the railway locomotive ac-dc converter circuit.
Background technology: the converter plant that existing railway locomotive is used, main circuit adopt three sections not five equilibrium half control bridges.The rectifier tube assembly of finishing AC-DC conversion in the bridge circuit is a plurality of series-parallel systems, its objective is to carry out the electric current shunting, reaches the purpose of fender guard, improves its reliability.Railway locomotive is in operational process, and it is big that its alternating-current voltage/AC voltage that provides exists fluctuation range, is easy to generate the problem of heavy current impact.And the variation of the fluctuation of power line voltage and load is easy to make device to damage when over-voltage and over-current.
Adopt the connection in series-parallel of a plurality of miniwatt rectifier tube in the available circuit, volume and cost are increased, reliability is reduced.
Summary of the invention: the purpose of this utility model provides a kind of railway locomotive ac-dc converter circuit, so that when not increasing volume and cost reliability is strengthened greatly.
The purpose of this utility model is to realize like this; Design a kind of railway locomotive ac-dc converter circuit, it is characterized in that: it is made of first bridge circuit, second bridge circuit, third axle road, and each bridge circuit all comprises two rectifier tubes, two thyristor, and the trigger end of each thyristor is electrically connected with trigger circuit; The anode tap that two equidirectional rectifier tubes are electrically connected in series in bridge circuit is electrically connected a dc output end as power supply with the anode tap that two equidirectional thyristor are electrically connected in series; The cathode terminal that two equidirectional rectifier tubes are electrically connected in series is electrically connected as another dc output end of power supply with the cathode terminal that two equidirectional thyristor are electrically connected in series; Electric connection point between the rectifier tube electric connection point of two equidirectional electrical connections in each bridge circuit and the thyristor of two equidirectional electrical connections is as the input end of source of AC, in second, third bridge circuit, the rectification brachium pontis of two rectifier tube formations is shared, and direct current output is a mouth; Input end is 3 inputs in second, third bridge circuit; Wherein thyristor on-state average current is at 2800～5000 (A), and non repetitive peak off state voltage is at 3000～8500 (V); Rectifier tube on-state average current is at 3200～7000 (A), and non repetitive peak off state voltage is at 3000～8500 (V).
Working process of the present utility model is, locomotive starts beginning and at first first via bridge circuit (half control bridge) carried out phase-shift voltage regulating control, and along with the increase gradually of two thyristor conduction angles, the ON time of two rectifier tubes reduces gradually.Wherein thyristor weekly the ON time of phase be π-α, the ON time of rectifier tube is π+α, α is phased angle.After two full conductings of thyristor, α is for hour, and output voltage is: 1/2U
dIn order further to improve voltage, two thyristor of the second tunnel three-phase bridge are carried out phase control, after its two full conductings of thyristor, the output total voltage is: 1/2U
d+ 1/4U
d=3/4U
dAt last two thyristor of Third Road bridge are carried out phase control, along with its conduction angle strengthens gradually, second road and bridge the road the ON time of two thyristor reduce gradually, after two full conductings of brilliant lock of Third Road bridge, output voltage is to the maximum: 1/2U
d+ 1/4U
d+ 1/4U
d=U
d
Load in the circuit is the traction electric machine that has smoothing reactor, and its output voltage is 1200V to the maximum, outgoing current is 2400A to the maximum.The electric current that the electric current that flows through the power scr brachium pontis is 1200A to the maximum, flow through power rectification pipe bridge arm is 2400A to the maximum.This railway locomotive ac-dc converter circuit, it strengthens reliability not increasing under volume and the cost condition greatly
The utility model is described in further detail below in conjunction with the embodiment accompanying drawing:
Description of drawings: Fig. 1 is the schematic circuit diagram of the utility model embodiment 1.
The specific embodiment: the utility model embodiment is three sections not five equilibrium half control bridges.It is by rectifier tube D3, D4, and thyristor T5, T6 constitute first bridge circuit, and by rectifier tube D1, D2, thyristor T1, T2 constitute second bridge circuit, and by rectifier tube D1, D2, thyristor T3, T4 constitute the third axle road; The anode tap that two equidirectional rectifier tubes are electrically connected in series in bridge circuit is electrically connected a dc output end as power supply with the anode tap that two equidirectional thyristor are electrically connected in series; The cathode terminal that two equidirectional rectifier tubes are electrically connected in series is electrically connected as another dc output end of power supply with the cathode terminal that two equidirectional thyristor are electrically connected in series; Electric connection point between the thyristor of the electric connection point in each bridge circuit between the rectifier tube of two equidirectional electrical connections and two equidirectional electrical connections is as the input end of source of AC, in second, third bridge circuit, the rectification brachium pontis that rectifier tube D1, D2 constitute is shared, and the dc output end on second bridge circuit, third axle road is 82,83; Wherein D1～D4 is that power rectifier pipe assembly, T1～T6 are the high-power thyristor assembly, at each thyristor, rectifier tube two ends parallel resistor and electric capacity is arranged all, constitutes RC commutation absorption circuit by them.Because thyristor and rectifier tube have 10, so resistance has R1～R10, and electric capacity has C1～C10; The brachium pontis that each thyristor forms has all been gone here and there quick acting fuse, and (F1～F6) is the RSG type to quick acting fuse.The trigger end of high-power thyristor T1～T6 is electrically connected with the trigger circuit that are made of Q1～Q6.Thyristor on-state average current is at 2800～5000 (A), and non repetitive peak off state voltage is at 3000～8500 (V); Rectifier tube on-state average current is at 3200～7000 (A), and non repetitive peak off state voltage is at 3000～8500 (V).
The winding power supply of voltage transformer: a1-x1 (a3-x3): 694.5V and a2-x2 (a4-x4) 694.5V.Simultaneously locate and a tap arranged at the mid point b1 (b3) of a1-x1 (a3-x3) winding, two segments of forming two big sections of isolating mutually like this and having mid-point tap to cut apart, each tap connects the mid point to two rectification brachium pontis, have 10 rectification brachium pontis like this, the promptly so-called three sections five equilibrium half control bridges not of sort circuit.
By adopting large power semiconductor assembly to substitute the structure of original miniwatt assembly parallel connection, the structural manufacturing process that promptly replaces the parallel connection of original many miniwatt assemblies with single large power semiconductor assembly is with highly reliable, long life of satisfying domestic locomotive requirement, few maintenance, non-maintaining novel converter plant.
Because semiconductor subassembly is operated under the high-power state, therefore must be fixed on the radiator with fastener.The radiator supporting with it makes the requirement of its overall dimensions and the realistic operating mode of heat dispersion for design-calculated is heat radiator dedicated voluntarily by design.
Locomotive starts beginning, at first T5, T6, D3, D4 half control bridge is carried out phase-shift voltage regulating control, and along with the increase gradually of T5, T6 conduction angle, the ON time of rectifier tube D3, D4 reduces gradually.Wherein thyristor weekly the ON time of phase be π-α, the ON time of rectifier tube is π+α, α is phased angle.After the full conducting of T5, T6, α is for hour, and output voltage is: 1/2U
dIn order further to improve voltage, thyristor T1, the T2 of three-phase bridge carried out phase control, after the full conducting of T1, T2, the output total voltage is: 1/2U
d+ 1/4U
d=3/4U
dAt last thyristor T3, T4 are carried out phase control, along with its conduction angle strengthens gradually, the ON time of thyristor T1, T2 reduces gradually after the full conducting of T3, T4, and output voltage is to the maximum: 1/2U
d+ 1/4U
d+ 1/4U
d=U
d
Claims (3)
1, railway locomotive ac-dc converter circuit is characterized in that: it is made of first bridge circuit, second bridge circuit, third axle road, and each bridge circuit all comprises two rectifier tubes, two thyristor, and the trigger end of each thyristor is electrically connected with trigger circuit; The anode tap that two equidirectional rectifier tubes are electrically connected in series in bridge circuit is electrically connected the cathode terminal output as power supply with the anode tap that two equidirectional thyristor are electrically connected in series; The cathode terminal that two equidirectional rectifier tubes are electrically connected in series is electrically connected as the power anode end with the cathode terminal that two equidirectional thyristor are electrically connected in series; Their electric connection point of thyristor of the rectifier tube of two equidirectional electrical connections and two equidirectional electrical connections in each bridge circuit is as the input end of source of AC, in second, third bridge circuit, the rectification brachium pontis of two rectifier tube formations is shared, and direct current output is a mouth; Input end is 3 inputs in second, third bridge circuit; Wherein thyristor on-state average current is at 2800～5000 (A), and non repetitive peak off state voltage is at 3000～8500 (V); Rectifier tube on-state average current is at 3200～7000 (A), and non repetitive peak off state voltage is at 3000～8500 (V).
2, railway locomotive ac-dc converter circuit according to claim 1 is characterized in that: at each thyristor, rectifier tube two ends parallel resistor and electric capacity are arranged all, constitute RC commutation absorption circuit by resistance and electric capacity.
3, railway locomotive ac-dc converter circuit according to claim 1 is characterized in that: the brachium pontis that each thyristor forms has all been gone here and there quick acting fuse, and (F1～F6) is the RSG type to quick acting fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420041633 CN2686912Y (en) | 2004-02-18 | 2004-02-18 | AC-DC converting circuit for railway locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420041633 CN2686912Y (en) | 2004-02-18 | 2004-02-18 | AC-DC converting circuit for railway locomotive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2686912Y true CN2686912Y (en) | 2005-03-23 |
Family
ID=34671401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420041633 Expired - Lifetime CN2686912Y (en) | 2004-02-18 | 2004-02-18 | AC-DC converting circuit for railway locomotive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2686912Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490645A (en) * | 2013-09-23 | 2014-01-01 | 株洲变流技术国家工程研究中心有限公司 | Single-phase electrified railway contact net direct-current deicing device and system |
-
2004
- 2004-02-18 CN CN 200420041633 patent/CN2686912Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490645A (en) * | 2013-09-23 | 2014-01-01 | 株洲变流技术国家工程研究中心有限公司 | Single-phase electrified railway contact net direct-current deicing device and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xi'an Kaitian Railway Electric Co., Ltd. Assignor: XI'AN KAITIAN POWER ELECTRONICS TECHNOLOGY CO., LTD. Contract record no.: 2011610000088 Denomination of utility model: AC-DC converting circuit for railway locomotive Granted publication date: 20050323 License type: Exclusive License Record date: 20110708 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140218 Granted publication date: 20050323 |