CN108973694A - A kind of resistive braking system - Google Patents
A kind of resistive braking system Download PDFInfo
- Publication number
- CN108973694A CN108973694A CN201810914678.9A CN201810914678A CN108973694A CN 108973694 A CN108973694 A CN 108973694A CN 201810914678 A CN201810914678 A CN 201810914678A CN 108973694 A CN108973694 A CN 108973694A
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- CN
- China
- Prior art keywords
- resistor
- braking
- brake
- current
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000004575 stone Substances 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000001172 regenerating effect Effects 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000008929 regeneration Effects 0.000 claims description 4
- 238000011069 regeneration method Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000013021 overheating Methods 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 11
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 4
- 230000003137 locomotive effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- 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
- B60T5/00—Vehicle modifications to facilitate cooling of brakes
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Regulating Braking Force (AREA)
- Braking Arrangements (AREA)
Abstract
The invention belongs to Control of Electric Vehicles fields, and in particular to a kind of resistive braking system, including data acquisition portion, braking adjustment portion and control unit, when n is equal to standard numerical value n0When, control switch S1It disconnects, S2Closure makes the conduction velocity first rate value of the output electric current of current adjusting component, controls the coolant liquid in conduit with the first flow rate, when n is greater than standard numerical value n0When, control switch S1、S2It disconnects, makes the second rate value of conduction velocity of current adjusting component output electric current, the coolant liquid controlled in conduit is flowed with second flow speed.The present invention controls the conduction velocity of current adjusting component output electric current and the heat-sinking capability of the hollow fin of heat dissipation according to the degree of stone is embedded in tyre tread gap, has achieved the purpose that energy conservation and safety.
Description
Technical Field
The invention belongs to the field of electric automobile control, and particularly relates to a resistance braking system.
Background
Electric braking technology, particularly resistive braking technology, is widely used on electric locomotives or new energy vehicles, during dynamic braking in which a traction motor may be used as a generator to slow the motion of the locomotive by converting the kinetic energy of the locomotive into electrical energy, and in rheostatic dynamic braking in which a grid resistor may be added to dissipate the generated energy as heat. For example, patent products of railway development service company are used for continuously variable dynamic brakes of locomotives (refer to patent document CN103998280B), brake feedback control circuits of electric vehicles (refer to patent document CN102501772B) of new energy vehicles electric control systems technology ltd, suzhou hagog, and patent products of new source power ltd, wuhan science and technology ltd, which are electrically driven automatic transmission energy feedback systems (refer to patent document CN 105383309B).
Disclosure of Invention
The invention provides a resistance braking system which dynamically adjusts the braking mode or the braking effect of a resistor based on real-time monitoring information of a tire so as to achieve the purposes of energy conservation and safety.
The brake control system comprises a data acquisition part, a brake adjusting part and a control part, wherein the control part controls the brake adjusting part to perform corresponding adjustment according to information acquired by the data acquisition part;
the data acquisition part is an image sensor arranged on the wheel arch of the automobile and is used for shooting an image of the tire;
the brake adjustment portion includes:
the braking resistor is used for converting the regenerative electric energy of the vehicle into heat energy in the braking process of the vehicle;
a current regulating component for regulating the brake regeneration current flowing to the brake resistor;
the radiating fin is arranged close to the brake resistor and used for radiating heat generated by the brake resistor;
wherein,
the current regulation assembly is arranged as follows: a first resistor R is connected in series between the base electrode of the mos tube and the input current1And a first capacitor C1A second resistor R is connected in series between the base and the collector2The collector is connected to a voltage source VCC, and a third resistor R is connected in series between the emitter and the ground3A fourth resistor R is connected in series between the emitter and the output current4A second capacitor C2And a third capacitance C3A second capacitor C2On the upper parallel connection is provided with a first switch S1Third capacitor C3On the upper parallel connection with a second switch S2By controlling the first switch S1A second switch S2The opening and closing of the brake are used for adjusting the time taken for the brake regeneration current to completely act on the brake resistor;
the control section is configured to:
(1) analyzing and counting the number n of pixel points with the gray value smaller than a standard value in the shot tire image;
(2) when n is within the standard range, the switch S is controlled1Breaking, S2The capacitor bank is closed, and the charging and discharging of the capacitor bank need a certain time, so that the braking regenerative current completely acts on the dynamic resistor after the first time, and the current is slowly released to the braking resistor, so that the temperature rise of the braking resistor is stable, and the thermal decay caused by overheating is avoided;
(3) when n exceeds the standard range, the tire tread gaps are possibly clamped with more stones, the tire grip force is reduced due to the fact that the tire tread gaps are clamped with more stones, in order to guarantee the braking effect of the whole vehicle, more regenerative electric energy needs to be converted into heat energy on the braking resistor more quickly, and therefore the switch S is controlled1、S2The brake current is cut off, so that the brake regenerative current completely acts on the dynamic resistor in a second time shorter than the first time, and the braking effect of the brake resistor is enhanced.
The fan and the impeller are arranged near the radiating fins, the radiating capacity of the radiating fins is improved by controlling the rotating speed of the fan, and when n exceeds a standard range, the rotating speed of the fan is increased to increase the radiating capacity of the radiating fins;
the invention has the beneficial effects that: according to the invention, the conduction rate of the output current of the current regulating assembly and the heat dissipation capacity of the heat dissipation hollow fins are controlled according to the deformation degree of the tire, so that the purposes of energy conservation and safety are achieved.
Drawings
Fig. 1 shows a circuit diagram of a current regulating device;
fig. 2 shows a control block diagram of the electric brake system.
Detailed Description
The structure of the present system and the functions performed are described in detail below with reference to the accompanying drawings.
A resistance braking system comprises a data acquisition part 1, a braking adjustment part 2 and a control part 3, wherein the control part 3 controls the braking adjustment part 2 to perform corresponding adjustment according to information acquired by the data acquisition part 1;
wherein,
the data acquisition part 1 is an image sensor arranged on the wheel arch of the automobile and is used for shooting images of tires;
the brake adjusting section 2 includes:
the braking resistor 21 is used for converting kinetic energy of the automobile into heat energy in the automobile braking process;
the current regulating assembly 22 includes:
mos tube 221 having a first resistor R connected in series between its base and input current1And a first capacitor C1A second resistor R is connected in series between the base and the collector2The collector is connected to a voltage source VCC, and a third resistor R is connected in series between the emitter and the ground3A fourth resistor R is connected in series between the emitter and the output current4A second capacitor C2And a third capacitance C3A second capacitor C2On the upper parallel connection is provided with a first switch S1Third capacitor C3On the upper parallel connection with a second switch S2By controlling S1、S2To regulate the conduction rate of the output current;
the heat dissipation assembly 23 includes:
a heat dissipating fin 231 closely attached to the braking resistor 21 for dissipating heat energy generated by the braking resistor;
a fan 232 disposed near the heat dissipating fins 231 for controlling the heat dissipating capacity of the heat dissipating fins 231 by controlling the rotation speed of the fan impeller;
the control section 3 is configured to:
(1) analyzing and counting the number n of pixel points with the gray value smaller than a standard value in the shot tire image;
(2) when n is within the standard range, the switch S is controlled1Breaking, S2The capacitor bank is closed, and the charging and discharging of the capacitor bank need a certain time, so that the braking regenerative current completely acts on the dynamic resistor after the first time, and the current is slowly released to the braking resistor, so that the temperature rise of the braking resistor is stable, and the thermal decay caused by overheating is avoided; meanwhile, an impeller in the fan is controlled to rotate at a first rotating speed value, so that the heat dissipation capacity of the heat dissipation fins is a first heat dissipation capacity value;
(3) when n exceeds the standard range, it indicates that the braking distance of the automobile is increased due to the fact that the tire grip is reduced because of more stones (the gray value of the stones is usually smaller than that of the black tire) contained in the tire pattern gaps, and the braking effect needs to be enhanced to maintain the original braking distance, therefore, the switch S is controlled1Breaking, S2Closing the fan, enabling the conduction rate of the current output by the current adjusting assembly to be a second speed value larger than the first speed value, enabling the braking effect of the braking resistor to be enhanced, controlling an impeller in the fan to rotate at a second rotating speed value larger than the first rotating speed value, enabling the heat dissipation capacity of the heat dissipation fins to be a second heat dissipation capacity value larger than the first heat dissipation capacity value, ensuring that heat generated by the braking resistor is dissipated as soon as possible, and avoiding the braking resistor from being damaged due to the fact that the braking resistor is in a high-temperature state for a long time.
It will be appreciated by persons skilled in the art that numerous variations and/or modifications may be made to the invention as shown in the specific embodiments without departing from the spirit or scope of the invention as broadly described. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. Likewise, the invention encompasses any combination of features, in particular of features in the patent claims, even if this feature or this combination of features is not explicitly specified in the patent claims or in the individual embodiments herein.
Claims (3)
1. A resistance braking system, characterized in that it dynamically adjusts the braking mode or effect of the resistance based on real-time monitoring information of the tyre.
2. A resistance braking system comprises a data acquisition part, a braking adjustment part and a control part, wherein the control part controls the braking adjustment part to perform corresponding adjustment according to information acquired by the data acquisition part; it is characterized in that the preparation method is characterized in that,
the data acquisition part is an image sensor arranged on the wheel arch of the automobile and is used for shooting an image of the tire;
the brake adjustment portion includes:
the braking resistor is used for converting the regenerative electric energy of the vehicle into heat energy in the braking process of the vehicle;
a current regulating component for regulating the brake regeneration current flowing to the brake resistor;
the radiating fin is arranged close to the brake resistor and used for radiating heat generated by the brake resistor;
wherein,
the current regulation assembly is arranged as follows: a first resistor R is connected in series between the base electrode of the mos tube and the input current1And a first capacitor C1A second resistor R is connected in series between the base and the collector2The collector is connected to a voltage source VCC, and a third resistor R is connected in series between the emitter and the ground3A fourth resistor R is connected in series between the emitter and the output current4A second capacitor C2And a third capacitance C3A second capacitor C2On the upper parallel connection is provided with a first switch S1Third capacitor C3On the upper parallel connection with a second switch S2By controlling the first switch S1A second switch S2The opening and closing of the brake are used for adjusting the time taken for the brake regeneration current to completely act on the brake resistor;
the control section is configured to:
(1) analyzing and counting the number n of pixel points with the gray value smaller than a standard value in the shot tire image;
(2) when n is within the standard range, the switch S is controlled1Breaking, S2The capacitor bank is closed, and the charging and discharging of the capacitor bank need a certain time, so that the braking regenerative current completely acts on the dynamic resistor after the first time, and the current is slowly released to the braking resistor, so that the temperature rise of the braking resistor is stable, and the thermal decay caused by overheating is avoided;
(3) when n exceeds the standard range, the tire tread gaps are possibly clamped with more stones, the tire tread gaps are clamped with more stones to reduce the ground holding force of the tire, more regenerative electric energy needs to be converted into heat energy on the braking resistor more quickly in order to ensure the braking effect of the whole vehicle, and therefore, the control is carried outSwitch S1、S2The brake current is cut off, so that the brake regenerative current completely acts on the dynamic resistor in a second time shorter than the first time, and the braking effect of the brake resistor is enhanced.
3. An electric brake system according to claim 2, further comprising a fan and an impeller provided in the vicinity of the heat-radiating fins, the heat-radiating capability of the heat-radiating fins being improved by controlling the rotation speed of the fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810914678.9A CN108973694A (en) | 2018-08-13 | 2018-08-13 | A kind of resistive braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810914678.9A CN108973694A (en) | 2018-08-13 | 2018-08-13 | A kind of resistive braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108973694A true CN108973694A (en) | 2018-12-11 |
Family
ID=64553052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810914678.9A Withdrawn CN108973694A (en) | 2018-08-13 | 2018-08-13 | A kind of resistive braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108973694A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112298148A (en) * | 2020-10-30 | 2021-02-02 | 上海易咖智车科技有限公司 | Parking control system and method and wheel type traveling device |
-
2018
- 2018-08-13 CN CN201810914678.9A patent/CN108973694A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112298148A (en) * | 2020-10-30 | 2021-02-02 | 上海易咖智车科技有限公司 | Parking control system and method and wheel type traveling device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181211 |
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| WW01 | Invention patent application withdrawn after publication |