CN103660965B - A kind of constant speed control method of electric locomotive and device - Google Patents
A kind of constant speed control method of electric locomotive and device Download PDFInfo
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- CN103660965B CN103660965B CN201310651939.XA CN201310651939A CN103660965B CN 103660965 B CN103660965 B CN 103660965B CN 201310651939 A CN201310651939 A CN 201310651939A CN 103660965 B CN103660965 B CN 103660965B
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Abstract
The invention discloses a kind of constant speed control method and device of electric locomotive, the method can comprise: obtain the braking force needed for electric locomotive, the size of the maximum electric braking force of the electric locomotive of more described required braking force and pre-stored, when required braking force is greater than described maximum electric braking force, for described electric locomotive applies described maximum electric braking force, and braking force needed for calculating and the difference of described maximum electric braking force, generate and send control that brake opens first control signal to described brake, described difference is sent to described brake, be that described electric locomotive applies the air-making power equal with described difference by described brake, the invention solves prior art when electric braking force is under-supply, make electric locomotive Accelerating running, the problem of easily causing danger.
Description
Technical field
The present invention relates to electric locomotive technical field, relate to a kind of constant speed control method and device of electric locomotive in particular.
Background technology
Electric locomotive refers to the locomotive by wheel driving motor, along with the development of electric locomotive, in order to assist driver driving, reduce the intensity of driver's work, electric locomotive is generally configured with constant speed mode, after constant speed mode starts, electric locomotive will travel at the uniform speed with target velocity.
In the prior art, when electric locomotive is in constant speed mode, the brake mode of employing is electric braking, by switching the tractive force of electric locomotive and electric braking force, ensure electric locomotive to make a concerted effort be zero, electric locomotive is traveled at the uniform speed.
But, electric braking force due to electric locomotive is limited, when electric locomotive is heavily loaded and descending runs, electric braking force may be under-supply, cause electric locomotive make a concerted effort be greater than zero, make electric locomotive Accelerating running, easily cause danger, therefore, there is potential safety hazard in the electric locomotive being in constant speed mode.
Summary of the invention
In view of this, the invention provides a kind of constant speed control method and device of electric locomotive, to solve in prior art, when electric braking force is under-supply, make electric locomotive Accelerating running, the problem of easily causing danger.
For achieving the above object, the invention provides following technical scheme:
A constant speed control method for electric locomotive, comprising:
Obtain the braking force needed for electric locomotive;
The size of the maximum electric braking force of the electric locomotive of more described required braking force and pre-stored;
When required braking force is greater than described maximum electric braking force, be that described electric locomotive applies described maximum electric braking force, and the difference of braking force needed for calculating and described maximum electric braking force;
Generate and send control that brake opens first control signal to described brake;
Described difference is sent to described brake, is that described electric locomotive applies the air-making power equal with described difference by described brake.
Preferably, the braking force needed for described acquisition electric locomotive, comprising:
After receiving fixed speed signal, obtain the total mass of described electric locomotive and the acceleration/accel of described electric locomotive, and determine the service direction of described electric locomotive; Described fixed speed signal is generated by the constant speed switch be connected with controller by first interface;
When judging that the service direction of described electric locomotive is identical with the direction of described acceleration/accel, calculate the braking force needed for described electric locomotive according to described acceleration/accel and described total mass by the first computing formula;
Wherein, the total mass of described first computing formula to be F=ma, m be described electric locomotive, a is the acceleration/accel of described electric locomotive, the braking force of F needed for electric locomotive.
Preferably, described difference being sent to described brake, is, after described electric locomotive applies the air-making power equal with described difference, also comprise by described brake:
When the braking force needed for the electric locomotive judging to obtain increases, determine the recruitment of required braking force;
Described recruitment is sent to described brake, is that described electric locomotive increases the air-making power equal with described recruitment by described brake.
Preferably, described difference being sent to described brake, is, after described electric locomotive applies the air-making power equal with described difference, also comprise by described brake:
When the braking force needed for the electric locomotive judging to obtain reduces, determine the decrease of required braking force, for described electric locomotive reduces electric braking force equal to described decrease, until the described electric braking force for electric locomotive applying is reduced to zero;
Generate and send the described brake closedown of control second controls signal to described brake, be the air-making power that described electric locomotive applies to excise described brake, and the electric braking force that braking force needed for the electric locomotive of described electric locomotive applying and described acquisition is equal.
Preferably, after the size of the maximum electric braking force of the electric locomotive of described required braking force and pre-stored, also comprise:
When required braking force is less than or equal to described maximum electric braking force, for described electric locomotive applies the electric braking force equal with required braking force.
A control device in constant speed for electric locomotive, comprising:
First acquiring unit, for obtaining the braking force needed for electric locomotive;
First comparing unit, for the size of the maximum electric braking force of the electric locomotive of more described required braking force and pre-stored;
Applying calculating unit, for when required braking force is greater than described maximum electric braking force, is that described electric locomotive applies described maximum electric braking force, and the difference of braking force needed for calculating and described maximum electric braking force;
First generates transmitting element, and open for generating and sending control brake first controls signal to described brake;
Sending applying unit, for described difference is sent to described brake, is that described electric locomotive applies the air-making power equal with described difference by described brake.
Preferably, described first acquiring unit comprises:
Obtain determination module, for after reception fixed speed signal, obtain the total mass of described electric locomotive and the acceleration/accel of described electric locomotive, and determine the service direction of described electric locomotive; Described fixed speed signal is generated by the constant speed switch be connected with controller by first interface;
Computing module, during for judging that the service direction of described electric locomotive is identical with the direction of described acceleration/accel, calculates the braking force needed for described electric locomotive according to described acceleration/accel and described total mass by the first computing formula;
Wherein, the total mass of described first computing formula to be F=ma, m be described electric locomotive, a is the acceleration/accel of described electric locomotive, the braking force of F needed for electric locomotive.
Preferably, this device also comprises:
First determining unit, for when the braking force needed for the electric locomotive judging to obtain increases, determines the recruitment of required braking force;
Sending and increase unit, for described recruitment is sent to described brake, is that described electric locomotive increases the air-making power equal with described recruitment by described brake.
Preferably, this device also comprises:
Determine to reduce unit, for when the braking force needed for the electric locomotive judging to obtain reduces, determine the decrease of required braking force, for described electric locomotive reduces electric braking force equal to described decrease, until the described electric braking force for electric locomotive applying is reduced to zero;
Second generates transmitting element, and close for generating and sending the described brake of control second controls signal to described brake, is the air-making power that described electric locomotive applies to excise described brake;
First applying unit, for applying the electric braking force equal with the braking force needed for the electric locomotive of described acquisition for described electric locomotive.
Preferably, this device also comprises:
Second applying unit, for when required braking force is less than or equal to described maximum electric braking force, for described electric locomotive applies the electric braking force equal with required braking force.
Known via above-mentioned technical scheme, compared with prior art, the invention discloses a kind of constant speed control method and device of electric locomotive, in the method, when the braking force needed for electric locomotive is greater than maximum electric braking force, the electric braking force indicating electric locomotive is under-supply, by applying maximum electric braking force and the air-making power equal with the difference of required braking force and maximum electric braking force respectively for electric locomotive, make a concerted effort for zero with what make electric locomotive, can travel at the uniform speed, ensure that the safety of electric locomotive.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The schematic flow sheet of the constant speed control method of a kind of electric locomotive that Fig. 1 provides for the embodiment of the present invention;
The schematic flow sheet of the constant speed control method of a kind of electric locomotive that Fig. 2 provides for the embodiment of the present invention;
The schematic flow sheet of the constant speed control method of a kind of electric locomotive that Fig. 3 provides for the embodiment of the present invention;
The structural representation of the control device in constant speed of a kind of electric locomotive that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the constant speed control method of a kind of electric locomotive that Fig. 5 provides for the embodiment of the present invention;
The structural representation of the constant speed control method of a kind of electric locomotive that Fig. 6 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of constant speed control method of electric locomotive, as shown in Figure 1, the method can comprise:
S101: obtain the braking force needed for electric locomotive;
After electric locomotive enters constant speed mode, in order to ensure that electric locomotive travels at the uniform speed, need to make electric locomotive to make a concerted effort be zero, namely need for electric locomotive applies tractive force or braking force, concrete, in this step,
Braking force required for described acquisition electric locomotive is specifically as follows:
After receiving fixed speed signal, obtain the total mass of electric locomotive and the acceleration/accel of electric locomotive, and determine the service direction of described electric locomotive;
Wherein, fixed speed signal is generated by the constant speed switch be connected with controller by first interface, and this fixed speed signal can be high level pulse signal also can be low level pulse signal.
Wherein, first interface is the I/O mouth of controller, constant speed switch is connected with controller by first interface, take fixed speed signal as high level pulse signal be example, after constant speed switch is pressed, generate high level pulse signal, controller can control electric locomotive and enter constant speed mode after receiving high level pulse signal by first interface.
Wherein, the acceleration/accel of electric locomotive comprises the direction of acceleration/accel and the size of acceleration/accel.
When judging that the service direction of described electric locomotive is identical with the direction of described acceleration/accel, calculate the braking force needed for described electric locomotive according to described acceleration/accel and described total mass by the first computing formula.
Wherein, when the service direction of electric locomotive is contrary with the direction of acceleration/accel, show to need for electric locomotive applies tractive force; And when the service direction of electric locomotive is identical with the direction of acceleration/accel, show to need to apply braking force for electric locomotive;
Concrete, the tractive force needed for electric locomotive and the value of braking force all can be calculated by the first computing formula;
First computing formula is: F=ma, m are the total mass of described electric locomotive, and a is the acceleration/accel of described electric locomotive, the tractive force of F needed for electric locomotive or the braking force needed for electric locomotive.
S102: the size of the maximum electric braking force of the electric locomotive of more described required braking force and pre-stored;
Wherein, maximum electric braking force is the maxim of the electric braking force adopting the mode of electric braking can apply for electric locomotive.
When required braking force is less than or equal to maximum electric braking force, for electric locomotive applies the electric braking force equal with required braking force;
And when required braking force is greater than maximum electric braking force, illustrate that electric braking force is under-supply, in this case, need the braking force applying other for electric locomotive with the braking force needed for supplementary electric locomotive.
S103: when required braking force is greater than described maximum electric braking force is that described electric locomotive applies described maximum electric braking force, and the difference of braking force needed for calculating and described maximum electric braking force;
Wherein, the difference of required braking force and maximum electric braking force is calculated to determine the size needing the braking force applying other for electric locomotive.
S104: generate and send control that brake opens first control signal to described brake.
It should be noted that, electric locomotive of the prior art has brake, can apply air-making power by brake for electric locomotive.
In the present invention, brake is connected with controller by the first switch, and the first control signal can be high level pulse signal, also can be low level pulse signal.
For the first control signal for high level pulse signal, when electric braking force is under-supply, controller triggers the first switch and cuts out, and generates high level pulse signal, obtains electric opening after brake receives high level pulse signal.
S105: described difference is sent to described brake is that described electric locomotive applies the air-making power equal with described difference by described brake.
The difference of the braking force needed for calculating and maximum electric braking force is sent to brake by controller, by brake for electric locomotive applies the air-making power identical with this difference with the braking force needed for supplementary electric locomotive.
In the present embodiment, when the braking force needed for electric locomotive is greater than maximum electric braking force, show that the electric braking force of electric locomotive is under-supply, by applying maximum electric braking force and the air-making power equal with the difference of required braking force and maximum electric braking force respectively for electric locomotive, make a concerted effort for zero with what make electric locomotive, can travel at the uniform speed, ensure that the safety of electric locomotive.
At the same time for electric locomotive applies on the basis of maximum electric braking force and air-making power, when the braking force needed for electric locomotive increases, in order to ensure that electric locomotive can travel at the uniform speed, also need to continue as electric locomotive and apply air-making power, concrete, the embodiment of the present invention additionally provides a kind of constant speed control method of electric locomotive, and as shown in Figure 2, the method can comprise:
S201: obtain the braking force needed for electric locomotive;
S202: the size of the maximum electric braking force of the electric locomotive of more described required braking force and pre-stored;
S203: when required braking force is greater than described maximum electric braking force is that described electric locomotive applies described maximum electric braking force, and the difference of braking force needed for calculating and described maximum electric braking force;
S204: generate and send control that brake opens first control signal to described brake;
S205: described difference is sent to described brake is that described electric locomotive applies the air-making power equal with described difference by described brake;
S206: when the braking force needed for the electric locomotive judging to obtain increases, determine the recruitment of required braking force;
Electric locomotive is after receiving fixed speed signal, the action obtaining the braking force needed for electric locomotive continues to carry out, be greater than on the basis of maximum electric braking force at required braking force, when required braking force increases, determined the recruitment of required braking force, the difference of the braking force of this recruitment needed for current time and the braking force needed for the upper moment;
Wherein, braking force is for electric locomotive was applied with the air-making power equal with the difference of maximum electric braking force with the braking force needed for the upper moment.
S207: described recruitment is sent to described brake is that described electric locomotive increases the air-making power equal with described recruitment by described brake.
Wherein, at the same time for electric locomotive applies on the basis of maximum electric braking force and air-making power, when the braking force needed for electric locomotive increases, in order to ensure that electric locomotive can travel at the uniform speed, the electric locomotive applying air-making power equal with recruitment is continued as, to ensure that electric locomotive can travel at the uniform speed by brake.
At the same time for electric locomotive applies on the basis of maximum electric braking force and air-making power, when the braking force needed for electric locomotive reduces, in order to ensure that electric locomotive can travel at the uniform speed, also need to be reduced to electric braking force or air-making power that electric locomotive applies, the embodiment of the present invention additionally provides a kind of constant speed control method of electric locomotive, as shown in Figure 3, the method can comprise:
S301: obtain the braking force needed for electric locomotive;
S302: the size of the maximum electric braking force of the electric locomotive of more described required braking force and pre-stored;
S303: when required braking force is greater than described maximum electric braking force is that described electric locomotive applies described maximum electric braking force, and the difference of braking force needed for calculating and described maximum electric braking force;
S304: generate and send control that brake opens first control signal to described brake;
S305: described difference is sent to described brake is that described electric locomotive applies the air-making power equal with described difference by described brake;
S306: when the braking force needed for the electric locomotive judging to obtain reduces, determine the decrease of required braking force is that described electric locomotive reduces electric braking force equal to described decrease, until the described electric braking force applied for electric locomotive is reduced to zero;
Electric locomotive is after receiving fixed speed signal, the action obtaining the braking force needed for electric locomotive continues to carry out, be greater than on the basis of maximum electric braking force at required braking force, when required braking force reduces, determine the decrease of required braking force, for described electric locomotive reduces electric braking force equal to described decrease, until described electric braking force is reduced to zero;
The difference of the braking force of this decrease needed for current time and the braking force needed for the upper moment, braking force is for electric locomotive was applied with the electric braking force equal with the braking force needed for the upper moment and/or air-making power.
In the present invention, because the change of air-making power is comparatively slow, in order to ensure that electric locomotive is under constant speed mode, steady, safe operation, when the braking force needed for electric locomotive reduces, preferably reducing electric braking force, then reducing air-making power.
S307: generate and send the described brake closedown of control second controls signal to described brake, be the air-making power that described electric locomotive applies to excise described brake, and the electric braking force that braking force needed for the electric locomotive of described electric locomotive applying and described acquisition is equal.
When the electric braking force applied for electric locomotive is decreased to zero, if the braking force needed for electric locomotive is still in reduction, then generates the second control signal and close to control brake, after brake cuts out, air-making power can not be applied for electric locomotive; Need for electric locomotive applies electric braking force, the electric braking force applied is equal with the braking force needed for electric locomotive simultaneously, and make a concerted effort for zero with what ensure electric locomotive, electric locomotive can travel at the uniform speed.
Wherein, the second control signal is contrary with the level of the first control signal, and when the first control signal is high level pulse signal, the second control signal is low level pulse signal; When the first control signal is low level pulse signal, the second control signal is high level pulse signal.
For the second control signal for low level pulse signal, when the electric braking force applied for electric locomotive is decreased to zero, if the braking force needed for electric locomotive is still in reduction, controller then triggers the first switch opens, generate low level pulse signal, after brake receives low level pulse signal, dead electricity is closed.
The embodiment of the present invention additionally provides a kind of control device in constant speed of electric locomotive, as shown in Figure 4, this device can comprise: the first acquiring unit 401, first comparing unit 402, applying calculating unit 403, first generate transmitting element 404, send applying unit 405, wherein:
First acquiring unit 401, may be used for obtaining the braking force needed for electric locomotive;
First comparing unit 402, may be used for the size of the maximum electric braking force of the electric locomotive of more described required braking force and pre-stored;
Applying calculating unit 403, may be used for when required braking force is greater than described maximum electric braking force, is that described electric locomotive applies described maximum electric braking force, and the difference of braking force needed for calculating and described maximum electric braking force;
First generates transmitting element 404, may be used for generating and sending control that brake opens first control signal to described brake;
Sending applying unit 405, may be used for described difference to send to described brake, is that described electric locomotive applies the air-making power equal with described difference by described brake.
In the present invention, said apparatus can also comprise: the second applying unit, wherein:
Second applying unit, may be used for when required braking force is less than or equal to described maximum electric braking force, for described electric locomotive applies the electric braking force equal with required braking force.
In the present invention, the first acquiring unit can comprise: obtain determination module, computing module, wherein:
Obtain determination module, may be used for, after reception fixed speed signal, obtaining the total mass of described electric locomotive and the acceleration/accel of described electric locomotive, and determining the service direction of described electric locomotive; Described fixed speed signal is generated by the constant speed switch be connected with controller by first interface;
Computing module, when may be used for judging that the service direction of described electric locomotive is identical with the direction of described acceleration/accel, calculates the braking force needed for described electric locomotive according to described acceleration/accel and described total mass by the first computing formula;
Wherein, the total mass of described first computing formula to be F=ma, m be described electric locomotive, a is the acceleration/accel of described electric locomotive, the braking force of F needed for electric locomotive.
The embodiment of the present invention additionally provides a kind of control device in constant speed of electric locomotive, as shown in Figure 5, this device can comprise: the first acquiring unit 501, first comparing unit 502, applying calculating unit 503, first generate transmitting element 504, send applying unit 505, first determining unit 506 and send increase unit 507, wherein:
First acquiring unit 501, may be used for obtaining the braking force needed for electric locomotive;
First comparing unit 502, may be used for the size of the maximum electric braking force of the electric locomotive of more described required braking force and pre-stored;
Applying calculating unit 503, may be used for when required braking force is greater than described maximum electric braking force, is that described electric locomotive applies described maximum electric braking force, and the difference of braking force needed for calculating and described maximum electric braking force;
First generates transmitting element 504, may be used for generating and sending control that brake opens first control signal to described brake;
Sending applying unit 505, may be used for described difference to send to described brake, is that described electric locomotive applies the air-making power equal with described difference by described brake;
First determining unit 506, may be used for, when the braking force needed for the electric locomotive judging to obtain increases, determining the recruitment of required braking force;
Sending and increase unit 507, may be used for described recruitment to send to described brake, is that described electric locomotive increases the air-making power equal with described recruitment by described brake.
The embodiment of the present invention additionally provides a kind of control device in constant speed of electric locomotive, as shown in Figure 6, this device can comprise: the first acquiring unit 601, first comparing unit 602, applying calculating unit 603, first generate transmitting element 604, send applying unit 605, determine that reducing unit 606, second generates transmitting element 607 and the first applying unit 608, wherein:
First acquiring unit 601, may be used for obtaining the braking force needed for electric locomotive;
First comparing unit 602, may be used for the size of the maximum electric braking force of the electric locomotive of more described required braking force and pre-stored;
Applying calculating unit 603, may be used for when required braking force is greater than described maximum electric braking force, is that described electric locomotive applies described maximum electric braking force, and the difference of braking force needed for calculating and described maximum electric braking force;
First generates transmitting element 604, may be used for generating and sending control that brake opens first control signal to described brake;
Sending applying unit 605, may be used for described difference to send to described brake, is that described electric locomotive applies the air-making power equal with described difference by described brake;
Determine to reduce unit 606, may be used for when the braking force needed for the electric locomotive judging to obtain reduces, determine the decrease of required braking force, for described electric locomotive reduces electric braking force equal to described decrease, until the described electric braking force for electric locomotive applying is reduced to zero;
Second generates transmitting element 607, and may be used for generating and sending second of the described brake closedown of control and control signal to described brake, is the air-making power that described electric locomotive applies to excise described brake;
First applying unit 608, may be used for for described electric locomotive applies the electric braking force equal with the braking force needed for the electric locomotive of described acquisition.
The specific implementation of each device can see the embodiment corresponding to specification sheets method above, and in this not go into detail.
Above in each device, when the braking force needed for electric locomotive is greater than maximum electric braking force, the electric braking force indicating electric locomotive is under-supply, by applying maximum electric braking force and the air-making power equal with the difference of required braking force and maximum electric braking force respectively for electric locomotive, make a concerted effort for zero with what make electric locomotive, can travel at the uniform speed, ensure that the safety of electric locomotive.
In this specification sheets, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a constant speed control method for electric locomotive, is characterized in that, comprising:
Obtain the braking force needed for electric locomotive;
The size of the maximum electric braking force of the electric locomotive of more described required braking force and pre-stored;
When required braking force is greater than described maximum electric braking force, be that described electric locomotive applies described maximum electric braking force, and the difference of braking force needed for calculating and described maximum electric braking force;
Generate and send control that brake opens first control signal to described brake;
Described difference is sent to described brake, is that described electric locomotive applies the air-making power equal with described difference by described brake;
Wherein, the braking force needed for described acquisition electric locomotive, comprising:
After receiving fixed speed signal, obtain the total mass of described electric locomotive and the acceleration/accel of described electric locomotive, and determine the service direction of described electric locomotive; Described fixed speed signal is generated by the constant speed switch be connected with controller by first interface;
When judging that the service direction of described electric locomotive is identical with the direction of described acceleration/accel, calculate the braking force needed for described electric locomotive according to described acceleration/accel and described total mass by the first computing formula;
Wherein, the total mass of described first computing formula to be F=ma, m be described electric locomotive, a is the acceleration/accel of described electric locomotive, the braking force of F needed for electric locomotive.
2. constant speed control method according to claim 1, is characterized in that, described difference is sent to described brake, is, after described electric locomotive applies the air-making power equal with described difference, also comprise by described brake:
When the braking force needed for the electric locomotive judging to obtain increases, determine the recruitment of required braking force;
Described recruitment is sent to described brake, is that described electric locomotive increases the air-making power equal with described recruitment by described brake.
3. constant speed control method according to claim 1, is characterized in that, described difference is sent to described brake, is, after described electric locomotive applies the air-making power equal with described difference, also comprise by described brake:
When the braking force needed for the electric locomotive judging to obtain reduces, determine the decrease of required braking force, for described electric locomotive reduces electric braking force equal to described decrease, until the described electric braking force for electric locomotive applying is reduced to zero;
Generate and send the described brake closedown of control second controls signal to described brake, be the air-making power that described electric locomotive applies to excise described brake, and the electric braking force that braking force needed for the electric locomotive of described electric locomotive applying and described acquisition is equal.
4. constant speed control method according to claim 1, is characterized in that, after the size of the maximum electric braking force of the electric locomotive of described required braking force and pre-stored, also comprises:
When required braking force is less than or equal to described maximum electric braking force, for described electric locomotive applies the electric braking force equal with required braking force.
5. a control device in constant speed for electric locomotive, is characterized in that, comprising:
First acquiring unit, for obtaining the braking force needed for electric locomotive;
First comparing unit, for the size of the maximum electric braking force of the electric locomotive of more described required braking force and pre-stored;
Applying calculating unit, for when required braking force is greater than described maximum electric braking force, is that described electric locomotive applies described maximum electric braking force, and the difference of braking force needed for calculating and described maximum electric braking force;
First generates transmitting element, and open for generating and sending control brake first controls signal to described brake;
Sending applying unit, for described difference is sent to described brake, is that described electric locomotive applies the air-making power equal with described difference by described brake;
Wherein, described first acquiring unit comprises:
Obtain determination module, for after reception fixed speed signal, obtain the total mass of described electric locomotive and the acceleration/accel of described electric locomotive, and determine the service direction of described electric locomotive; Described fixed speed signal is generated by the constant speed switch be connected with controller by first interface;
Computing module, during for judging that the service direction of described electric locomotive is identical with the direction of described acceleration/accel, calculates the braking force needed for described electric locomotive according to described acceleration/accel and described total mass by the first computing formula;
Wherein, the total mass of described first computing formula to be F=ma, m be described electric locomotive, a is the acceleration/accel of described electric locomotive, the braking force of F needed for electric locomotive.
6. control device in constant speed according to claim 5, is characterized in that, this device also comprises:
First determining unit, for when the braking force needed for the electric locomotive judging to obtain increases, determines the recruitment of required braking force;
Sending and increase unit, for described recruitment is sent to described brake, is that described electric locomotive increases the air-making power equal with described recruitment by described brake.
7. control device in constant speed according to claim 5, is characterized in that, this device also comprises:
Determine to reduce unit, for when the braking force needed for the electric locomotive judging to obtain reduces, determine the decrease of required braking force, for described electric locomotive reduces electric braking force equal to described decrease, until the described electric braking force for electric locomotive applying is reduced to zero;
Second generates transmitting element, and close for generating and sending the described brake of control second controls signal to described brake, is the air-making power that described electric locomotive applies to excise described brake;
First applying unit, for applying the electric braking force equal with the braking force needed for the electric locomotive of described acquisition for described electric locomotive.
8. control device in constant speed according to claim 5, is characterized in that, this device also comprises:
Second applying unit, for when required braking force is less than or equal to described maximum electric braking force, for described electric locomotive applies the electric braking force equal with required braking force.
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| CN201310651939.XA CN103660965B (en) | 2013-12-05 | 2013-12-05 | A kind of constant speed control method of electric locomotive and device |
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| CN105365843B (en) * | 2015-12-03 | 2018-02-27 | 南车株洲电力机车有限公司 | A kind of method for controlling municipal rail train supplement gas braking |
| CN105437984B (en) * | 2015-12-08 | 2017-12-26 | 南车株洲电力机车有限公司 | A kind of city rail vehicle braking method |
| CN107253452B (en) * | 2017-06-28 | 2020-03-10 | 北京新能源汽车股份有限公司 | Method and device for controlling constant-speed cruise of electric vehicle during limited charging of battery |
| CN107444371B (en) * | 2017-08-17 | 2019-08-20 | 中车株洲电力机车有限公司 | A kind of magnetic-levitation train and its braking control system and method |
| CN111267637A (en) * | 2019-12-03 | 2020-06-12 | 中国国家铁路集团有限公司 | Motor train unit speed control method and system |
| CN111391880A (en) * | 2020-04-09 | 2020-07-10 | 中车青岛四方车辆研究所有限公司 | Control method and control system for air-electricity hybrid braking of locomotive |
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| JPH07115633B2 (en) * | 1988-03-08 | 1995-12-13 | 三菱電機株式会社 | Electric vehicle control device |
| JP4792801B2 (en) * | 2005-04-21 | 2011-10-12 | 株式会社アドヴィックス | Vehicle speed control device |
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| US5498941A (en) * | 1993-12-22 | 1996-03-12 | Samsung Heavy Industry Co., Ltd. | Speed control device used for electric automobiles and method therefor |
| CN100408371C (en) * | 2002-12-10 | 2008-08-06 | 日产自动车株式会社 | Vehicle brake control system |
| CN103129403A (en) * | 2013-03-20 | 2013-06-05 | 南车株洲电力机车有限公司 | Mixing braking control method and device |
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