CN206155196U - Braking energy absorbing device - Google Patents
Braking energy absorbing device Download PDFInfo
- Publication number
- CN206155196U CN206155196U CN201621100475.9U CN201621100475U CN206155196U CN 206155196 U CN206155196 U CN 206155196U CN 201621100475 U CN201621100475 U CN 201621100475U CN 206155196 U CN206155196 U CN 206155196U
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- electric capacity
- direct current
- contactor
- parallel
- utility
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Abstract
The utility model discloses a braking energy absorbing device, including isolator QS1, main direct current contactor KM1, reactor L and the electric capacity C of series connection between DC power supply positive pole and DC power supply negative pole, main direct current contactor KM1 is parallelly connected by the series branch of compriseing buffering contactor KM2 and resistance R1, electric capacity C1 connects in parallel has the copped wave branch road, the copped wave branch road is including the IGBT module V1 and fast recovery diode V2 that establish ties mutually, fast recovery diode V2 connects in parallel and has brake resistance R2. The beneficial effects of the utility model are that: guarantee direct current busbar voltage disappearance undulant phenomenon by a wide margin, had fine rapidity and certain stability, the whole volume and a manufacturing cost of greatly reduced device.
Description
Technical field
The utility model is related to a kind of braking energy absorption plant.
Background technology
The control all of existing braking energy absorption plant is all the side using the simple conducting dutycycle for adjusting IGBT
Formula realizes that the maximum advantage of this kind of mode is that control mode is simple, but it is when absorbed power is relatively large, to direct current network
Impact it is more obvious, need to be equipped with direct current reactor reducing the disturbance to direct current network voltage.
The content of the invention
For technical deficiency more than solving, the utility model is there is provided a kind of fast response time, the system of low production cost
Energy absorption plant.
The utility model is realized by following measures：
A kind of braking energy absorption plant of the present utility model, including being connected on DC power anode and DC power cathode
Between disconnecting switch QS1, main D.C. contactor KM1, reactor L and electric capacity C, the main D.C. contactor KM1 be parallel with by
The series arm of snubber contact device KM2 and resistance R1 compositions；The electric capacity C1 is parallel with copped wave branch road, and the copped wave branch road includes
IGBT module V1 being in series and fast recovery diode V2, the fast recovery diode V2 is parallel with braking resistor R2.
The beneficial effects of the utility model are：The utility model is when putting into operation, it is ensured that DC bus-bar voltage does not go out
The phenomenon of existing fluctuation, with good rapidity and certain stability, but also with faster dynamic responding speed,
Control is relatively easy, and to stablizing supply conductor voltage, reduction electromagnetic pollution, cutting operating costs plays an important role.Can be by original
The inductance value of some DC filtering reactors reduces or removes, and substantially reduces the overall volume and production cost of device, favorably
In the installation and maintenance of equipment, be conducive to the utility model in the popularization and application of subway.
Description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is control method demonstration graph of the present utility model.
Specific embodiment
Below in conjunction with the accompanying drawings further detailed description is done to the utility model：
As shown in figure 1, a kind of braking energy absorption plant of the present utility model, including being connected on dc source just
Disconnecting switch QS1, main D.C. contactor KM1 between pole and DC power cathode, reactor L and electric capacity C are main straight
Stream contactor KM1 is parallel with the series arm being made up of snubber contact device KM2 and resistance R1；Electric capacity C1 is parallel with copped wave branch road,
Copped wave branch road includes that IGBT module V1 being in series and fast recovery diode V2, fast recovery diode V2 are parallel with braking resistor
R2。
A kind of control method of braking energy absorption plant of the present utility model, comprises the following steps：
Step 1, determines the fluctuation range value Δ U that DC bus-bar voltage is allowed, and calculates the maximum allowable braking resistor of single
Making time Δ t；Its computing formula is as follows：
Wherein, I represents the transient absorption electric current of braking resistor R2, and C represents the capacitance of electric capacity C1；
Step 2, when the braking initial stage, keeps the braking resistor switching frequency of setting, and is thrown by gradually increasing braking resistor
The mode of angle of incidence t gradually steps up dutycycle, when braking resistor making time t gradually increases to the throwing of maximum allowable braking resistor
During angle of incidence Δ t, step 3 is carried out；
Step 3, keeps the making time Δ t of maximum allowable braking resistor constant, first gradually increases the switching of braking resistor
Frequency, is then gradually reduced the switching frequency of braking resistor, when the switching frequency of braking resistor is gradually decrease to the braking of setting
During resistance switching frequency, step 4 is carried out；
Step 4, keeps the braking resistor switching frequency of setting, and by being gradually reduced the side of braking resistor making time t
Formula gradually steps up dutycycle.
In step 1, its computing formula is obtained by the charging and discharging currents fortran of electric capacity, and the charging and discharging currents of electric capacity are public
Formula is as follows：Wherein, I represents the transient absorption electric current of braking resistor R2, and C represents the capacitance of electric capacity C1.
The control method includes that industry and mining city analysis, braking energy absorb dynamic regulation control.Industry and mining city analysis is to sentence
Opportunity and condition question that whether disconnected braking energy absorption plant puts into operation, are the bases of control method.Braking energy absorbs
Dynamic regulation is to solve to carry out real-time regulation after braking energy absorption plant puts into operation, should ensure connected direct current network voltage
Can not continue to raise, not damage the equipment for being connected to direct current network, ensure again when device puts into operation, DC bus-bar voltage
Can not there is the phenomenon of fluctuation, with good rapidity and certain stability.
By formula (1) as can be seen that the voltage pulsation on electric capacity is relevant with three factors, the instantaneous suction of braking resistor R2
Electric current I is received, holds the time t of the capacitance C and braking resistor input of C1.After direct current network voltage and braking resistor determine,
The transient absorption electric current of braking resistor is equal to DC voltage divided by braking resistor resistance after braking resistor input, can regard as
It is uncontrollable.The capacitance of electric capacity is also uncontrollable after device determination.What is uniquely can adjusted is braking resistor
Switching time t.
Main implementation method of the present utility model is fluctuation range Δ U, the braking resistor allowed according to DC bus-bar voltage
Transient absorption electric current, the capacitance of electric capacity can calculate the making time Δ t of the maximum allowable braking resistor of single.This practicality
New essential core is when the braking energy of required absorption is less, by way of regulation dutycycle, with required
The increase of the braking energy to be absorbed, dutycycle can gradually increase, braking resistor input time with increase, when it reaches
During the ON time that maximum is allowed, with the further increase of the braking energy of required absorption, conventional way is further
Increase dutycycle, increase the time of braking resistor input, can so cause the fluctuation of dc bus increases.In the utility model,
After the single making time of braking resistor reaches allowed maximum time, the making time of braking resistor is not further added by, and
It is the dutycycle of the increase braking resistor input covert by increasing the switching frequency of braking resistor, can so reaches and both may be used
Braking energy is absorbed while can also reduce the voltage pulsation of the direct current network caused by braking resistor switching with Same Efficieney.
When braking energy is relatively small, braking energy absorption plant realizes braking energy by way of regulation dutycycle
The regulation control of absorption, when braking energy is relatively large, the single making time of braking resistor, by the output of adjusting means
The mode of frequency is controlled come the regulation for realizing braking energy absorption.From the foregoing it can be seen that using the utility model institute
The method stated, the inductance value of reactor L that can be in reduction equipment is even removed.The body of equipment can so be substantially reduced
Product and cost.
The above is only the preferred embodiment of this patent, it is noted that for the ordinary skill people of the art
For member, on the premise of without departing from the art of this patent principle, some improvement and replacement can also be made, these improve and replace
Also should be regarded as the protection domain of this patent.
Claims (1)
1. a kind of braking energy absorption plant, it is characterised in that：Including be connected on DC power anode and DC power cathode it
Between disconnecting switch QS1, main D.C. contactor KM1, reactor L and electric capacity C, the main D.C. contactor KM1 is parallel with by delaying
Rush the series arm of contactor KM2 and resistance R1 compositions；The electric capacity C1 is parallel with copped wave branch road, and the copped wave branch road includes phase
IGBT module V1 and fast recovery diode V2 of series connection, the fast recovery diode V2 is parallel with braking resistor R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621100475.9U CN206155196U (en) | 2016-09-30 | 2016-09-30 | Braking energy absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621100475.9U CN206155196U (en) | 2016-09-30 | 2016-09-30 | Braking energy absorbing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206155196U true CN206155196U (en) | 2017-05-10 |
Family
ID=58652971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621100475.9U Expired - Fee Related CN206155196U (en) | 2016-09-30 | 2016-09-30 | Braking energy absorbing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206155196U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106364328A (en) * | 2016-09-30 | 2017-02-01 | 新风光电子科技股份有限公司 | Brake energy absorbing device and control method thereof |
| CN111443288A (en) * | 2020-04-27 | 2020-07-24 | 山东沃森电源设备有限公司 | Low-cost new energy automobile motor test power supply |
-
2016
- 2016-09-30 CN CN201621100475.9U patent/CN206155196U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106364328A (en) * | 2016-09-30 | 2017-02-01 | 新风光电子科技股份有限公司 | Brake energy absorbing device and control method thereof |
| CN106364328B (en) * | 2016-09-30 | 2019-04-02 | 新风光电子科技股份有限公司 | Braking energy absorption plant and its control method |
| CN111443288A (en) * | 2020-04-27 | 2020-07-24 | 山东沃森电源设备有限公司 | Low-cost new energy automobile motor test power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20210930 |
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| CF01 | Termination of patent right due to non-payment of annual fee |