CN103818263B - A kind of braking control system and method - Google Patents
A kind of braking control system and method Download PDFInfo
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- CN103818263B CN103818263B CN201310694835.7A CN201310694835A CN103818263B CN 103818263 B CN103818263 B CN 103818263B CN 201310694835 A CN201310694835 A CN 201310694835A CN 103818263 B CN103818263 B CN 103818263B
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Abstract
The present invention relates to brake control art, disclose a kind of braking control system and method.Wherein, this system comprises: DC bus, at least two IGBT, at least two braking resistors, voltage detector component and Programmable Logic Controllers; Braking resistor is composed in series at least two-way separately respectively and brakes circuit series with IGBT, braking circuit series and voltage detector component parallel with one another be arranged on DC bus; The mouth of voltage detector component is connected with the input end of Programmable Logic Controller, and the mouth of Programmable Logic Controller is connected with the input end of IGBT.Voltage on the DC bus that the present invention collects according to voltage sensor, the conduction ratio of two IGBT is outputted in IGBT, to realize the poor phase control of two-way IGBT, current sinking slope when starting rises every road IGBT, thus ensure that on DC bus-bar voltage pulsation-free basis, greatly improve car load stationarity in motion.
Description
Technical field
The present invention relates to brake control art, be mainly applicable to braking control system and method.
Background technology
Traditional braking force control system adopts the brake control mode mated with In-wheel-motor driving, namely how many electric drive wheels are had just to have how many group brak control units and high-power energy consumption resistance, simultaneously, master mode adopts power resistor open and the pattern turned off, this is all unfavorable to car load stationarity in motion simultaneously.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of braking control system and method, which increases car load stationarity in motion.
For solving the problems of the technologies described above, the invention provides a kind of braking control system, comprising: DC bus, at least two IGBT, at least two braking resistors, voltage detector component and Programmable Logic Controllers; Described braking resistor is composed in series at least two-way separately respectively and brakes circuit series with described IGBT, described braking circuit series and described voltage detector component parallel with one another be arranged on described DC bus; The mouth of described voltage detector component is connected with the input end of described Programmable Logic Controller, and the mouth of described Programmable Logic Controller is connected with the input end of described IGBT.
Further, also comprise: DC fan, blower fan IGBT and blower fan resistance; Described DC fan, described blower fan IGBT and described blower fan resistor group become blower fan circuit series, and described fans in series circuit is connected with described DC bus; The input end of described blower fan IGBT is connected with the mouth of described Programmable Logic Controller.
Further, described IGBT comprises: an IGBT and the 2nd IGBT; Described braking resistor comprises: the first braking resistor and the second braking resistor; A described IGBT and described first braking resistor are composed in series the first braking circuit series, and described 2nd IGBT and described second braking resistor are composed in series the second braking circuit series; Described first braking circuit series, described second braking circuit series and described voltage detector component are parallel with one another on described DC bus.
Further, also comprise: the first current measuring element, the second current measuring element and the 3rd current measuring element; Described first current measuring element is arranged on described DC bus, and described second current measuring element is connected in described first braking circuit series, and described 3rd current measuring element is connected in described second braking circuit series; First current measuring element, the second current measuring element are all connected with the input end of described Programmable Logic Controller with the mouth of the 3rd current measuring element.
Further, also comprise: motor and uncontrollable rectifier circuit; The mouth of described motor is connected with described DC bus by described uncontrollable rectifier circuit.
Further, also comprise: circuit breaker; Described circuit breaker is arranged between described motor and described uncontrollable rectifier circuit.
Present invention also offers a kind of brake control method, comprising:
Gather the voltage on DC bus, obtain the climbing speed of described direct current bus bar pressure;
The conduction ratio of climbing speed at least two IGBT be connected in parallel between described DC bus according to described voltage adjusts, and to realize the poor phase control of described IGBT, makes the voltage on described DC bus lower than the most high threshold voltage of bus.
Further, also comprise:
Gather the electric current on described DC bus and IGBT road;
By the power of described IGBT under the current conduction ratio of the Current calculation collected, the power of IGBT described under current conduction ratio is mated with the power-performance index of described IGBT, judge whether described IGBT normally works;
If the match is successful, then illustrate that described IGBT normally works, difference phase control is effective;
If mate unsuccessful, then described IGBT non-normal working is described, difference phase control has error, changes described IGBT or overhauls.
Further, the received current of described DC bus is carry out the electric current after full-bridge rectification to the outgoing current of power supply.
Further, also comprise:
Circuit protection is carried out to the outgoing current of described power supply.
Beneficial effect of the present invention is:
Braking control system provided by the invention and method, according to the voltage on the DC bus that voltage detector component collects, the conduction ratio of two IGBT is outputted in IGBT, to realize the poor phase control of two-way IGBT, current sinking slope when starting rises every road IGBT, thus ensure that on DC bus-bar voltage pulsation-free basis, greatly improve car load stationarity in motion.
Accompanying drawing explanation
The circuit diagram of the braking control system that Fig. 1 provides for the embodiment of the present invention;
The diagram of circuit of the brake control method that Fig. 2 provides for the embodiment of the present invention.
Detailed description of the invention
For setting forth the present invention further for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, the detailed description of the invention of the braking control system proposed according to the present invention and method and principle of work are described in detail.
See Fig. 1, the braking control system that the embodiment of the present invention provides, comprising: DC bus, at least two IGBT, at least two braking resistors, voltage detector component, Programmable Logic Controller, DC fan, blower fan IGBT and blower fan resistance; Braking resistor is composed in series at least two-way separately respectively and brakes circuit series with IGBT, braking circuit series and voltage detector component parallel with one another be arranged on DC bus; The mouth of voltage detector component is connected with the input end of Programmable Logic Controller by CAN, and the mouth of Programmable Logic Controller is connected with the input end of IGBT.DC fan, blower fan IGBT and blower fan resistor group become blower fan circuit series, and fans in series circuit is connected with DC bus; The input end of blower fan IGBT is connected with the mouth of Programmable Logic Controller.Wherein, IGBT comprises: an IGBTT1 and the 2nd IGBTT2; Braking resistor comprises: the first braking resistor R1 and the second braking resistor R2; One IGBTT1 and the first braking resistor R1 is composed in series the first braking circuit series, and the 2nd IGBTT2 and the second braking resistor R2 is composed in series the second braking circuit series; First braking circuit series, the second braking circuit series and voltage detector component are parallel with one another on DC bus.It should be noted that, in the present embodiment, the power of blower fan resistance is less than the power of the first braking resistor R1, the second braking resistor R2.
In order to monitor the mode of operation of the IGBT in the embodiment of the present invention, the power of IGBT in work is needed to mate with the power-performance index of IGBT, to make two-way IGBT can more effectively perform poor phase control, to ensure the steady of DC bus-bar voltage further, the embodiment of the present invention also comprises: the first current measuring element, the second current measuring element and the 3rd current measuring element; First current measuring element is arranged on DC bus, and the second current measuring element is connected in the first braking circuit series, and the 3rd current measuring element is connected in the second braking circuit series; First current measuring element, the second current measuring element are all connected with the input end of Programmable Logic Controller by CAN with the mouth of the 3rd current measuring element.Wherein, the power-performance index of IBGT is provided by the manufacturer of IBGT.
In order to the function making the embodiment of the present invention have rectification, the embodiment of the present invention also comprises: motor and uncontrollable rectifier circuit; The mouth of motor is connected with DC bus by uncontrollable rectifier circuit.
In order to improve the safety of the embodiment of the present invention when rectification, the embodiment of the present invention also comprises: AC circuit breaker; AC circuit breaker is arranged between motor and uncontrollable rectifier circuit.
In the present embodiment, voltage detector component is Hall voltage sensor UM; Current measuring element is current sensor, and namely the first current measuring element is the first current sensor LM1, and the second current measuring element is the second current sensor LM2, and the 3rd current measuring element is the 3rd current sensor LM3; Uncontrollable rectifier circuit is the uncontrollable rectifying circuit of three-phase bridge; Motor is diesel powerplant FD.
See Fig. 2, the embodiment of the present invention additionally provides a kind of brake control method, comprising:
Step S110: gathered the voltage on DC bus by voltage detector component, and by the voltage transmission that collects to Programmable Logic Controller, thus obtain the climbing speed of direct current bus bar pressure;
Step S210: the conduction ratio of at least two IGBT be connected in parallel between DC bus is transferred in IGBT according to the climbing speed of direct current bus bar pressure by Programmable Logic Controller, complete the adjustment of the conduction ratio to IGBT, to realize poor phase control to IGBT, make voltage on DC bus lower than the most high threshold voltage of bus.In the present embodiment, an IGBTT1 and the first braking resistor R1 is composed in series the first braking circuit series, the 2nd IGBTT2 and the second braking resistor R2 is composed in series the second braking circuit series; By parallel with one another on DC bus to the first braking circuit series, the second braking circuit series and voltage detector component.Correspondingly, the concrete steps of step S210 are: the conduction ratio of an IGBTT1 and the 2nd IGBTT2 is transferred in IGBT according to the climbing speed of direct current bus bar pressure by Programmable Logic Controller, complete the adjustment of the conduction ratio to an IGBTT1 and the 2nd IGBTT2, to realize poor phase control to an IGBTT1 and the 2nd IGBTT2, make voltage on DC bus lower than the most high threshold voltage of bus.
Step S310: gather the electric current on DC bus and IGBT road.In the present embodiment, the first current measuring element is arranged on DC bus, the electric current on DC bus is gathered; Second current measuring element is connected in the first braking circuit series, the electric current flowing through an IGBTT1 is gathered; 3rd current measuring element is connected in the second braking circuit series, the electric current flowing through the 2nd IGBTT2 is gathered; First current measuring element, the second current measuring element and the 3rd current measuring element separately respectively by the current delivery that collects to Programmable Logic Controller.Wherein, the received current of DC bus is carry out the electric current after full-bridge rectification by the outgoing current of the uncontrollable rectifying circuit of three-phase bridge to power supply (motor).Also it should be noted that, by circuit breaker, circuit protection is carried out to the outgoing current of power supply.
Step S410: the resistance of Programmable Logic Controller based on each IGBT and the power of each IGBT under the current conduction ratio of Current calculation collected, the power of IGBT each under current conduction ratio is mated with the power-performance index of each IGBT, judges whether each IGBT normally works; Wherein, the resistance of each IBGT and power-performance index are provided by the manufacturer of IBGT.
Step S411: if the matching result of step S410 is successfully, then illustrate that the IGBT that the match is successful normally works, difference phase control is effective;
Step S412: if the matching result of step S410 is unsuccessful, then illustrate the unsuccessful IGBT non-normal working of coupling, and difference phase control has error, needs to change IGBT or overhaul.
In the present embodiment, voltage detector component is Hall voltage sensor UM; Current measuring element is current sensor, and namely the first current measuring element is the first current sensor LM1, and the second current measuring element is the second current sensor LM2, and the 3rd current measuring element is the 3rd current sensor LM3; Uncontrollable rectifier circuit is the uncontrollable rectifying circuit of three-phase bridge; Motor is diesel powerplant FD.
When the braking control system that the embodiment of the present invention provides be arranged on electric wheel mining vehicle works time, first the alternating current that diesel powerplant FD sends enters AC circuit breaker, through AC circuit breaker control after through the uncontrollable rectifying circuit full-bridge rectification of three-phase bridge.Convert alternating current is become direct current (DC) by the uncontrollable rectifying circuit of three-phase bridge, and exports with the form of DC bus.When electricity jogging braking, the inertia energy of traveling or potential energy etc. are passed to wheel hub motor by driving system by mine car.Motor is with generation mode work, and the kinetic energy on rotor axis of electric will change electric energy into, and this energy feeds back to DC side through the backward diode of inverter.In the power generation process of motor, the motor braking moment of generation applies braking through driving system to drive wheel, produces braking force.Meanwhile, power drive controller controls braking resistor box work, to consume the electric energy that motor sends, thus maintains the stable of DC bus-bar voltage.Voltage sensor and current sensor respectively each cycle gather DC bus-bar voltage U
mwith DC bus current I
m, and be sent to Programmable Logic Controller participation full-vehicle control, simultaneously also for control for brake by CAN.Suppose that braking maneuver threshold voltage is 1100V, bus maximum voltage is less than 1200V, and braking stops voltage to be 1000V, and control for brake principle performs by following three kinds of modes:
A) when Programmable Logic Controller receives the electric braking permission signal Uzy exported from master controller, Programmable Logic Controller opens air-blower control path immediately.Meanwhile, based on the DC bus-bar voltage U that voltage sensor exports
mdetect DC bus-bar voltage U
mclimbing speed, Programmable Logic Controller start control for brake, two main brakes IGBT(T1, T2) conduction ratio according to DC bus-bar voltage U
mclimbing speed and determine, thus by DC bus-bar voltage U
mcontrol within 1200V, this design ensures DC bus-bar voltage U admirably
msteady, drastically increase car load stationarity in motion.
B) when Programmable Logic Controller receives the emergency brake signal exported from master controller, Programmable Logic Controller opens blower fan IGBT immediately, and is opened all completely by two-way IGBT, namely brakes with maximum B.P., improves vehicle security.
C) do not receive braking when Programmable Logic Controller and allow signal Uzy, and continuous several times detects DC bus-bar voltage U
mduring more than 1100V, Programmable Logic Controller drops into automatically, first starts DC fan, makes the conducting of blower fan road.Secondly, send brake activation signals and the IGBT conduction ratio that is suitable for IGBT by CAN, two main brakes IGBT(T1, T2) conduction ratio according to DC bus-bar voltage U
mclimbing speed and determine, thus by DC bus-bar voltage U
mcontrol within 1200V, this design ensures DC bus-bar voltage U admirably
msteady, drastically increase car load stationarity in motion.It should be noted that, be consecutively detected DC bus-bar voltage U
mcan set according to actual requirement more than number of times during 1100V.
Here also it should be noted that, the embodiment of the present invention is Series power resistance on DC fan also, when the less braking of needs, only needs blower fan road work and work without the need to high-power braking resistor, considerably reduce the consumption of energy, thus improve car load fuel economy in motion.
The braking control system that the embodiment of the present invention provides and method, voltage on the DC bus that Programmable Logic Controller collects according to voltage sensor, the conduction ratio of two IGBT is outputted in IGBT, to realize the poor phase control of two-way IGBT, current sinking slope when starting rises every road IGBT, thus ensure that on DC bus-bar voltage pulsation-free basis, greatly improve car load stationarity in motion.The embodiment of the present invention also makes control for brake part and rectifying part common DC bus, more close physical connection, achieves the overall-in-one control schema of braking and rectification.In addition, in the rectifying part of the embodiment of the present invention, have employed three phase full bridge without control rectification, thus achieve the high power density of rectifying part, efficient, high reliability and low entire vehicle design cost.The embodiment of the present invention also adds a high-power circuit breaker in the front end of rectifying part, thus improves car load safety in motion.
It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (8)
1. a braking control system, is characterized in that, comprising: DC bus, at least two IGBT, at least two braking resistors, voltage detector component and Programmable Logic Controllers; Described braking resistor is composed in series at least two-way separately respectively and brakes circuit series with described IGBT, described braking circuit series and described voltage detector component parallel with one another be arranged on described DC bus; The mouth of described voltage detector component is connected with the input end of described Programmable Logic Controller, and the mouth of described Programmable Logic Controller is connected with the input end of described IGBT; Also comprise: DC fan, blower fan IGBT and blower fan resistance; Described DC fan, described blower fan IGBT and described blower fan resistor group become blower fan circuit series, and described fans in series circuit is connected with described DC bus; The input end of described blower fan IGBT is connected with the mouth of described Programmable Logic Controller.
2. braking control system as claimed in claim 1, it is characterized in that, described IGBT comprises: an IGBT and the 2nd IGBT; Described braking resistor comprises: the first braking resistor and the second braking resistor; A described IGBT and described first braking resistor are composed in series the first braking circuit series, and described 2nd IGBT and described second braking resistor are composed in series the second braking circuit series; Described first braking circuit series, described second braking circuit series and described voltage detector component are parallel with one another on described DC bus.
3. braking control system as claimed in claim 2, is characterized in that, also comprise: the first current measuring element, the second current measuring element and the 3rd current measuring element; Described first current measuring element is arranged on described DC bus, and described second current measuring element is connected in described first braking circuit series, and described 3rd current measuring element is connected in described second braking circuit series; First current measuring element, the second current measuring element are all connected with the input end of described Programmable Logic Controller with the mouth of the 3rd current measuring element.
4. the braking control system according to any one of claim 1-3, is characterized in that, also comprises: motor and uncontrollable rectifier circuit; The mouth of described motor is connected with described DC bus by described uncontrollable rectifier circuit.
5. braking control system as claimed in claim 4, is characterized in that, also comprise: circuit breaker; Described circuit breaker is arranged between described motor and described uncontrollable rectifier circuit.
6. a brake control method, is characterized in that, comprising:
Gather the voltage on DC bus, obtain the climbing speed of described direct current bus bar pressure;
The conduction ratio of climbing speed at least two IGBT be connected in parallel between described DC bus according to described voltage adjusts, and to realize the poor phase control to described IGBT, makes the voltage on described DC bus lower than the most high threshold voltage of bus;
Also comprise:
Gather the electric current on described DC bus and IGBT road;
By the power of described IGBT under the current conduction ratio of the Current calculation collected, the power of IGBT described under current conduction ratio is mated with the power-performance index of described IGBT, judge whether described IGBT normally works;
If the match is successful, then illustrate that described IGBT normally works, difference phase control is effective;
If mate unsuccessful, then described IGBT non-normal working is described, difference phase control has error, changes described IGBT or overhauls.
7. brake control method as claimed in claim 6, it is characterized in that, the received current of described DC bus is carry out the electric current after full-bridge rectification to the outgoing current of power supply.
8. brake control method as claimed in claim 7, is characterized in that, also comprise:
Circuit protection is carried out to the outgoing current of described power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310694835.7A CN103818263B (en) | 2013-12-17 | 2013-12-17 | A kind of braking control system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310694835.7A CN103818263B (en) | 2013-12-17 | 2013-12-17 | A kind of braking control system and method |
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| CN103818263A CN103818263A (en) | 2014-05-28 |
| CN103818263B true CN103818263B (en) | 2016-01-13 |
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| CN201310694835.7A Active CN103818263B (en) | 2013-12-17 | 2013-12-17 | A kind of braking control system and method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159905A (en) * | 2015-03-26 | 2016-11-23 | 控制技术有限公司 | The fault logic circuits of converter braking circuit, method and apparatus and converter |
| CN108574427B (en) * | 2017-03-10 | 2022-06-28 | 西门子公司 | Frequency converter brake unit and frequency converter |
| CN115102431A (en) * | 2022-06-28 | 2022-09-23 | 上海儒竞智控技术有限公司 | Brake control device and system of direct current fan |
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| AU2005251187B2 (en) * | 2004-05-27 | 2008-09-18 | Siemens Aktiengesellschaft | AC/AC converter for hybrid vehicles |
| US8324846B2 (en) * | 2008-09-15 | 2012-12-04 | Caterpillar Inc. | Electric drive retarding system and method |
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| DE102010061845A1 (en) * | 2010-07-09 | 2012-01-12 | Hyundai Motor Co. | System for recharging a plug-in hybrid vehicle |
| CN202309507U (en) * | 2011-10-18 | 2012-07-04 | 深圳市英威腾电气股份有限公司 | Braking unit and power conversion equipment |
| CN202406013U (en) * | 2011-11-30 | 2012-08-29 | 江苏大全凯帆电器股份有限公司 | Braking unit of wind power generation converter |
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| CN103818263A (en) | 2014-05-28 |
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