CN106240551B - A kind of electric braking control method and control system - Google Patents
A kind of electric braking control method and control system Download PDFInfo
- Publication number
- CN106240551B CN106240551B CN201610621983.XA CN201610621983A CN106240551B CN 106240551 B CN106240551 B CN 106240551B CN 201610621983 A CN201610621983 A CN 201610621983A CN 106240551 B CN106240551 B CN 106240551B
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- Prior art keywords
- control
- circuit
- electric braking
- voltage
- braking
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/02—Dynamic electric resistor braking
- B60L7/08—Controlling the braking effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/30—Railway vehicles
- B60Y2200/33—Rail cars; Waggons
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
The invention discloses a kind of electric braking control method and control system, method is comprising steps of S1. obtains electric braking control instruction；S2. control electrical brake system enters electric braking state；S3. control middle dc voltage is stablized in preset permission voltage range, until traction electric machine exits on-position；Control system includes: instruction acquisition module, brake control module, voltage control module.The present invention is by will be during electric braking, the voltage value of intermediate DC circuit maintains in preset permission voltage range, so that traction electric machine is lower in the braking state to keep reasonable overload, to improve the torque of traction electric machine, promote electric braking force output, the advantages of with the electric braking force of traction electric machine is effectively improved in the case where not improving traction electric machine volume and weight.
Description
Technical field
The present invention relates to brake control art more particularly to a kind of electric braking control methods suitable for urban track traffic
And control system.
Background technique
Low-floor tramcar shares right of way usually on urban road with other vehicles, therefore vehicle usually will be
In emergency circumstances hide the every obstacle being likely to occur on urban road complicated and changeable with biggish braking deceleration, vehicle
Required braking force is very high.Low-floor tramcar in an emergency braking situation brake force generally by mechanical braking force, track system
Power and electric braking force three superposition are just able to satisfy the requirement of braking deceleration.It mechanical brake device, magnetic rail braking device and leads
Draw motor to be installed on low-floor tramcar bogie, but low-floor tramcar leads to reduce the height on floor
Require the volume of installation bogie those above device as small as possible, often to adapt to the narrow requirement of installation space.How
The brake force that limited installation space improves in the case of emergency braking is key point, including by improving traction electric machine electricity
The mode of brake force, which are usually to pass through increase traction electric machine effective volume to lead to improve the braking moment of traction electric machine
The torque for drawing motor can indicate with formula following formula,Wherein, T is torque, and D is diameter of stator bore, lefFor iron
Heart length, it is seen that traction electric machine torque is directly proportional to the core length of motor, traction electric machine torque and diameter of stator bore square at
Direct ratio.Therefore, such as in the case where not increasing traction electric machine volume, the electric braking force for improving traction electric machine is one urgently to be resolved
The problem of.
Summary of the invention
The technical problem to be solved in the present invention is that, for technical problem of the existing technology, the present invention provides one
Kind effectively improves the electric braking force of traction electric machine in the case where not improving traction electric machine volume and weight, promotes emergency braking
When low-floor tramcar brake force electric braking control method and control system.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows: a kind of electric braking control method, including it is as follows
Step:
S1. electric braking control instruction is obtained；
S2. control electrical brake system enters electric braking state；
S3. control middle dc voltage is stablized in preset permission voltage range, until traction electric machine exits braking shape
State.
As a further improvement of the present invention, the specific steps of the step S2 include:
S2.1. the inversion control pulse of inverter is blocked；
S2.2. the connection between intermediate DC circuit and front-end power is disconnected；
S2.3. the inversion control pulse of inverter is restarted, control traction electric machine enters electric braking state and plays electricity
Braking moment.
As a further improvement of the present invention, the step S2.2 is by disconnecting the intermediate DC circuit and front-end power
Between contactor realize.
As a further improvement of the present invention, the specific steps of the step S3 include:
S3.1. the voltage value of the intermediate DC circuit is monitored；
S3.2. when the voltage value of the intermediate DC circuit is higher than the preset permission voltage range, braking is opened
Chopper circuit；When the voltage value of the intermediate DC circuit is lower than the preset permission voltage range, shutdown braking copped wave
Circuit.
As a further improvement of the present invention, under the preset nominal situation for allowing voltage range to be greater than traction electric machine
Voltage is overturned in the voltage of intermediate DC circuit, the control less than traction electric machine and system.
As a further improvement of the present invention, the electric braking control instruction in the step S1 is that emergency braking control refers to
It enables；Electric braking state in the step S2 is the urgent electric braking state that electrical brake system plays maximum electric braking force.
A kind of electric braking control system, comprising:
Instruction acquisition module: for obtaining electric braking control instruction；
Brake control module: enter electric braking state for controlling electrical brake system；
Voltage control module: stablize in preset permission voltage range for controlling middle dc voltage, until traction
Motor exits on-position.
As a further improvement of the present invention, the brake control module includes:
Motor control module: for blocking the inversion control pulse of inverter, and the inversion control of restarting inverter
Pulse processed, control traction electric machine enter electric braking state and play electric braking force square；
Circuit control module: for disconnecting the connection between intermediate DC circuit and front-end power.
As a further improvement of the present invention, the voltage control module includes:
Circuit monitoring module: for monitoring the voltage value of the intermediate DC circuit；
Chop control module: it is higher than the preset permission voltage range for the voltage value when the intermediate DC circuit
When, open braking chopper circuit；When the voltage value of the intermediate DC circuit is lower than the preset permission voltage range, close
Disconnected braking chopper circuit.
Compared with the prior art, the advantages of the present invention are as follows: the present invention by by during electric braking, intermediate DC circuit
Voltage value maintain in preset permissions voltage range, preset the permissions voltage range is electric higher than intermediate dc under nominal situation
The voltage value on road, by improving the voltage value of intermediate DC circuit, so that traction electric machine is lower in the braking state to keep reasonable mistake
It carries, to improve the torque of traction electric machine, promotes electric braking force output, have in the feelings for not improving traction electric machine volume and weight
Under condition, the advantages of effectively improving the electric braking force of traction electric machine.
Detailed description of the invention
Fig. 1 is that low-floor tramcar draws main circuit schematic illustration.
Fig. 2 is specific embodiment of the invention flow diagram.
Fig. 3 is specific embodiment of the invention structural schematic diagram.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
It limits the scope of the invention.
Low-floor tramcar draws main circuit as shown in Figure 1, intermediate DC circuit passes through contactor KM1 and front-end power
Connection obtains electric energy, and intermediate DC circuit is connect by DC/AC inverter with traction electric machine, and DC/AC inverter is in traction state
It is lower to provide the electric energy inversion of intermediate DC circuit to electric energy for three-phase electricity for traction electric machine, by traction electric machine under electric braking state
Intermediate DC circuit is delivered to after generated electric braking energy conversion, braking resistor passes through braking chopper circuit and intermediate dc
Circuit connection, for consuming braking electric energy.
As shown in Fig. 2, the specific implementation step of the present embodiment electric braking control method includes: that S1. obtains electric braking control
Instruction；S2. control electrical brake system enters electric braking state；S3. control middle dc voltage is stablized in preset permission voltage
In range, until traction electric machine exits on-position.
In the present embodiment, the specific steps of step S2 include: the inversion control pulse of S2.1. block inverter；S2.2.
Disconnect the connection between intermediate DC circuit and front-end power；S2.3. the inversion control pulse of inverter is restarted, control is led
Draw motor to enter electric braking state and play electric braking force square.In the present embodiment, low-floor tramcar driver Consoles are obtained
After the electric braking control instruction of transmission, the control pulse of DC/AC inverter is blocked, no longer provides traction electric energy to traction electric machine.
After the completion of the control pulse blocking of DC/AC inverter, disconnect contactor KM1, cutting intermediate DC circuit and front-end power it
Between energy link circuit, guarantee that arcing will not be led to there are electric current because of in circuit when disconnecting contactor KM1, extend
Contactor KM1 service life.After disconnecting contactor KM1, control traction electric machine plays electric braking characteristic and enters electric braking state,
Traction electric machine passes through inverter for energy back to front end direct current side when being in electric braking state.Traction electric machine is in electric braking state
Become generator down, a large amount of braking electric energy will be generated, at direct current and is delivered to by DC/AC inverter by transformation of electrical energy is braked
Intermediate DC circuit.Since the energy link circuit between intermediate DC circuit and front-end power is already off, braking electric energy without
Method is fed back to front-end power system, rises so as to cause the voltage of intermediate DC circuit.
In the present embodiment, the specific steps of step S3 include: the voltage value of S3.1. monitoring intermediate DC circuit；S3.2.
When the voltage value of intermediate DC circuit is higher than preset permission voltage range, braking chopper circuit is opened；When intermediate direct current
When the voltage value on road is lower than preset permission voltage range, shutdown braking chopper circuit.Since the maximum electromagnetism of traction electric machine turns
Square is proportional with input voltage, when electric braking operating condition, raises traction electric machine input voltage, can quickly promote traction
Maximum electromagnetic torque when motor braking, to improve the brake force of traction electric machine output.
In the present embodiment, equipment is caused to be damaged in order to guarantee persistently increase because of the voltage of intermediate DC circuit
It ruins, has preset a permission voltage range, by monitoring the voltage value of intermediate DC circuit, when the voltage value is permitted higher than preset
Perhaps when voltage range, that is, when being higher than the upper limit value for allowing voltage, braking chopper circuit is opened, it is intermediate straight by braking resistor consumption
Electric energy on current circuit prevents equipment from damaging because of overtension so that the voltage of intermediate DC circuit declines.When the voltage value
When lower than preset permission voltage range, that is, when being lower than the lower limit value for allowing voltage, shutdown braking chopper circuit, braking resistor is not
The electric energy in intermediate DC circuit is consumed again.At this point, voltage in intermediate DC circuit is exported because of the braking energy of traction electric machine
And rise again, after reaching the upper limit value for allowing voltage range, decline again due to braking chopper circuit and opening, it is so past
It is multiple, until exiting on-position to low-floor tramcar.In the present embodiment, it in order to guarantee the safety of equipment, while can protect again
Card traction electric machine persistently exports higher brake force, preset to allow voltage range intermediate greater than under the nominal situation of traction electric machine
Voltage is overturned in the voltage of DC circuit, the control less than traction electric machine and system.The permission voltage range is according to tramcar
Actual conditions and set, by be arranged it is reasonable allow voltage range so that the mistake of traction electric machine is loaded in a reasonable range
It is interior, required electric braking force can be exported, and can guarantee the safety of equipment.
The maximum braking torque of traction electric machine is promoted by improving the voltage of intermediate DC circuit, since traction electric machine is logical
It overloads to promote maximum braking force, and the operation of traction electric machine long term overloading is unfavorable for motor radiating.In the present embodiment, it walks
Electric braking control instruction in rapid S1 is emergency braking control instruction；Electric braking state in step S2 is electrical brake system performance
The urgent electric braking state of maximum electric braking force.In the present embodiment, by being adopted when low-floor tramcar is in emergency braking
Electric braking is carried out with the mode that traction electric machine overloads, meanwhile, control traction electric machine entrance can play the urgent of maximum electric braking force
On-position to be quickly obtained brake force required in emergency situations in a short time, and takes into account traction electric machine to heat dissipation
Requirement, guarantee the service life of traction electric machine.The present embodiment has in the case where not improving traction electric machine volume and weight,
The electric braking force of traction electric machine is effectively improved, when promoting emergency braking the advantages of low-floor tramcar brake force.
As shown in figure 3, the present embodiment electric braking control system includes: instruction acquisition module: for obtaining electric braking control
Instruction；Brake control module: enter electric braking state for controlling electrical brake system；Voltage control module: for controlling centre
DC voltage stability is in preset permission voltage range, until traction electric machine exits on-position.
Brake control module includes: motor control module: for blocking the inversion control pulse of inverter, and being opened again
The inversion control pulse of dynamic inverter, control traction electric machine enter electric braking state and play electric braking force square；Circuit control mould
Block: for disconnecting the connection between intermediate DC circuit and front-end power.
Voltage control module includes: circuit monitoring module: for monitoring the voltage value of intermediate DC circuit；Chop control mould
Block: for opening braking chopper circuit when the voltage value of intermediate DC circuit is higher than preset permission voltage range；Work as centre
When the voltage value of DC circuit is lower than preset permission voltage range, shutdown braking chopper circuit.
Above-mentioned only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form.Although of the invention
It has been disclosed in a preferred embodiment above, however, it is not intended to limit the invention.Therefore, all without departing from technical solution of the present invention
Content, technical spirit any simple modifications, equivalents, and modifications made to the above embodiment, should all fall according to the present invention
In the range of technical solution of the present invention protection.
Claims (7)
1. a kind of electric braking control method, which comprises the steps of:
S1. electric braking control instruction is obtained；
S2. control electrical brake system enters electric braking state；
S3. control middle dc voltage is stablized in preset permission voltage range, until traction electric machine exits on-position；
The voltage of intermediate DC circuit, is less than traction under the preset nominal situation for allowing voltage range to be greater than traction electric machine
Voltage is overturned in the control of motor and system；
Electric braking control instruction in the step S1 is emergency braking control instruction；Electric braking state in the step S2 is
Electrical brake system plays the urgent electric braking state of maximum electric braking force.
2. electric braking control method according to claim 1, which is characterized in that the specific steps of the step S2 include:
S2.1. the inversion control pulse of inverter is blocked；
S2.2. the connection between intermediate DC circuit and front-end power is disconnected；
S2.3. the inversion control pulse of inverter is restarted, control traction electric machine enters electric braking state and plays electric braking
Torque.
3. electric braking control method according to claim 2, it is characterised in that: the step S2.2 is by disconnecting in described
Between contactor between DC circuit and front-end power realize.
4. electric braking control method according to claim 2, which is characterized in that the specific steps of the step S3 include:
S3.1. the voltage value of the intermediate DC circuit is monitored；
S3.2. when the voltage value of the intermediate DC circuit is higher than the preset permission voltage range, braking copped wave is opened
Circuit；When the voltage value of the intermediate DC circuit is lower than the preset permission voltage range, shutdown braking chopper circuit.
5. a kind of electric braking control system characterized by comprising
Instruction acquisition module: for obtaining electric braking control instruction；
Brake control module: enter electric braking state for controlling electrical brake system；
Voltage control module: stablize in preset permission voltage range for controlling middle dc voltage, until traction electric machine
Exit on-position；
The voltage of intermediate DC circuit, is less than traction under the preset nominal situation for allowing voltage range to be greater than traction electric machine
Voltage is overturned in the control of motor and system；
The electric braking control instruction is emergency braking control instruction；The electric braking state is that electrical brake system plays maximum electricity
The urgent electric braking state of brake force.
6. electric braking control system according to claim 5, which is characterized in that the brake control module includes:
Motor control module: for blocking the inversion control pulse of inverter, and the inversion control arteries and veins of restarting inverter
Punching, control traction electric machine enter electric braking state and play electric braking force square；
Circuit control module: for disconnecting the connection between intermediate DC circuit and front-end power.
7. electric braking control system according to claim 6, which is characterized in that the voltage control module includes:
Circuit monitoring module: for monitoring the voltage value of the intermediate DC circuit；
Chop control module: for when the voltage value of the intermediate DC circuit be higher than the preset permission voltage range when,
Open braking chopper circuit；When the voltage value of the intermediate DC circuit is lower than the preset permission voltage range, shutdown
Brake chopper circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610621983.XA CN106240551B (en) | 2016-07-29 | 2016-07-29 | A kind of electric braking control method and control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610621983.XA CN106240551B (en) | 2016-07-29 | 2016-07-29 | A kind of electric braking control method and control system |
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| Publication Number | Publication Date |
|---|---|
| CN106240551A CN106240551A (en) | 2016-12-21 |
| CN106240551B true CN106240551B (en) | 2019-08-27 |
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| CN201610621983.XA Active CN106240551B (en) | 2016-07-29 | 2016-07-29 | A kind of electric braking control method and control system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108312852B (en) * | 2018-02-28 | 2020-10-30 | 徐州徐工矿山机械有限公司 | Electric braking method for alternating current transmission mining dump truck |
| CN110415205B (en) * | 2019-04-01 | 2020-08-04 | 浦江漱金电子科技有限公司 | Reliable parameter extraction platform |
| CN111845671B (en) * | 2019-04-25 | 2021-09-24 | 中车株洲电力机车研究所有限公司 | Control method for electric wheel dumper under coasting downhill working condition |
| CN115230771B (en) * | 2022-08-16 | 2024-03-15 | 西南交通大学 | Motor shaft temperature monitoring and control system of rail transit train |
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|---|---|---|---|---|
| CN1907751A (en) * | 2006-08-24 | 2007-02-07 | 上海地铁运营有限公司 | Electric soft braking system for underground engines |
| CN102991360A (en) * | 2012-12-28 | 2013-03-27 | 上海三一重机有限公司 | Electric braking control method for electrically-driven tramcar |
| JP2013070611A (en) * | 2012-11-26 | 2013-04-18 | Toshiba Corp | Electric vehicle with load adjusting device |
| CN104539218A (en) * | 2015-01-30 | 2015-04-22 | 株洲南车时代电气股份有限公司 | Traction converter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203637592U (en) * | 2013-12-17 | 2014-06-11 | 北车大连电力牵引研发中心有限公司 | Driving device and vehicle |
-
2016
- 2016-07-29 CN CN201610621983.XA patent/CN106240551B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1907751A (en) * | 2006-08-24 | 2007-02-07 | 上海地铁运营有限公司 | Electric soft braking system for underground engines |
| JP2013070611A (en) * | 2012-11-26 | 2013-04-18 | Toshiba Corp | Electric vehicle with load adjusting device |
| CN102991360A (en) * | 2012-12-28 | 2013-03-27 | 上海三一重机有限公司 | Electric braking control method for electrically-driven tramcar |
| CN104539218A (en) * | 2015-01-30 | 2015-04-22 | 株洲南车时代电气股份有限公司 | Traction converter |
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| CN106240551A (en) | 2016-12-21 |
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