CN109017328B - Eddy current retarder capable of being dynamically adjusted - Google Patents

Eddy current retarder capable of being dynamically adjusted Download PDF

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Publication number
CN109017328B
CN109017328B CN201810969365.3A CN201810969365A CN109017328B CN 109017328 B CN109017328 B CN 109017328B CN 201810969365 A CN201810969365 A CN 201810969365A CN 109017328 B CN109017328 B CN 109017328B
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disc
sub
distance
value
rotor
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CN109017328A (en
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宋青健
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Funing Aobo Electrical Equipment Co.,Ltd.
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Hefei Baoma Machinery Design Co ltd
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    • 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
    • B60L7/28—Eddy-current braking
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
    • H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
  • Braking Arrangements (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention belongs to the field of automobile auxiliary braking, and particularly relates to a dynamically adjustable eddy current retarder which comprises a rotor assembly, a stator assembly, a support assembly, rotor discs, a data acquisition part and a control part, wherein the distance between the two rotor discs is adjusted according to the speed of a vehicle to adjust the braking torque of the eddy current retarder and the heat dissipation performance of the eddy current retarder, and the adjustment is corrected according to the gradient of a road surface. The eddy current retarder adjusts the distance between the two rotor sub-discs according to the running speed of an automobile and the road surface gradient value, and achieves the purposes of reducing power consumption and saving electric energy on the premise of ensuring the braking effect.

Description

Eddy current retarder capable of being dynamically adjusted
Technical Field
The invention belongs to the field of automobile auxiliary braking, and particularly relates to a dynamically adjustable eddy current retarder.
Background
The eddy current retarder is a commonly used auxiliary braking device, and a control mode of a sub-gear is usually adopted, and usually, an intervention time or a gear of eddy current braking is selected according to an actual braking condition, for example, a patent combined braking system eddy current retarder controller and a control method of Zhejiang university (refer to patent CN102120424B), a patent commercial vehicle integrated braking system sub-working condition braking force distribution optimization method of Jilin university (refer to patent CN105292092B), a patent new energy commercial vehicle non-contact combined retarding braking system of Wuhan university (refer to patent CN104527438B), and a patent of Jiangsu university, which are eddy current retarders capable of automatically adjusting air gaps and a control method thereof (refer to patent CN 104578687B).
Disclosure of Invention
The invention provides an eddy current retarder with an adjustable hardware structure, which can be adaptively adjusted based on actual use environment so as to reduce power consumption and save electric energy on the premise of ensuring the braking effect.
A dynamically adjustable eddy current retarder comprises a rotor assembly, a stator assembly and a bracket assembly, wherein,
the rotor assembly comprises a rotor disc, a data acquisition part and a control part,
the rotor disc comprises a first sub disc, a second sub disc and a heat dissipation assembly, the first sub disc is connected with the second sub disc through the rotor disc adjusting assembly, and in an initial state, the distance between the first sub disc and the second sub disc is a first distance value d1；
The rotor disk adjustment assembly comprises:
the telescopic rod is a hollow cylinder, the inner wall of the telescopic rod is provided with internal threads, one end of the telescopic rod is fixed on the first sub-disc, and the other end of the telescopic rod is connected with a screw rod with external threads;
the motor is connected with the end part of the screw rod and fixed on the second sub-disc, the screw rod is driven to rotate through the rotation of the motor, the telescopic rod is made to reciprocate along the axial direction of the screw rod, the distance between the first sub-disc and the second sub-disc is changed, and a torque calculation formula is used
Figure GDA0002920583800000011
It can be known that an increase in the distance between the first sub-disc and the second sub-disc results in an increase in the braking torque of the eddy current retarder;
the heat dissipation assembly includes:
the radiating fins are respectively attached to the first sub-disc and the second sub-disc and are used for radiating heat generated in the braking process;
the fan is arranged above the rotor disc adjusting assembly and used for adjusting the heat dissipation capacity of the heat dissipation assembly by controlling the rotating speed of the fan;
the data acquisition part comprises:
a speed sensor for detecting a running speed V of the automobile;
an angle sensor for detecting a gradient value α of a road surface;
the distance sensor is arranged at the intersection of the first sub-disc and the telescopic rod and used for detecting the distance d between the first sub-disc and the second sub-disc;
when the driving speed V of the automobile is less than the standard speed value V0When the distance between the first sub-disc and the second sub-disc is kept at the first distance value d1The fan is controlled to rotate at a first rotating speed value unchanged;
when the driving speed V of the automobile is greater than the standard speed value V0When the distance sensor detects that the distance d between the first sub-disc and the second sub-disc is equal to the second distance value d2When the motor is controlled to stop rotating,in order to avoid the magnetic permeability of the rotor disc from being reduced due to overheating, the fan is controlled to rotate at a second rotating speed value which is larger than the first rotating speed value, wherein the second distance value d2>First distance value d1；
And correcting the adjustment according to the slope value alpha of the road surface detected by the angle sensor: when the gradient value alpha of the road surface is larger than the standard gradient value alpha0And then, the road surface is steep, and the adjustment is not enough to safely brake the automobile, so that the distance between the first sub-disc and the second sub-disc is increased by 10-20% on the basis of the second distance value, and the rotating speed of the fan is increased by 10-20% on the basis of the second rotating speed value.
The invention has the beneficial effects that: the invention adjusts the distance between the two rotor sub-discs according to the driving speed of the automobile and the road slope value, and achieves the purposes of reducing power consumption and saving electric energy on the premise of ensuring the braking effect. .
Drawings
FIG. 1 shows a schematic diagram of an eddy current retarder configuration;
FIG. 2 is a schematic diagram showing the variation of the spacing between two rotor sub-discs;
fig. 3 shows a control block diagram of an eddy current retarder.
Detailed Description
The structure of the present system and the functions performed are described in detail below with reference to the accompanying drawings.
An eddy current retarder is formed by connecting a rotor assembly, a stator assembly and a bracket assembly, wherein the rotor assembly comprises a rotor disc 1, a data acquisition part 2 and a control part 3, and the control part 3 controls the rotor disc 1 to perform corresponding adjustment according to information acquired by the data acquisition part 2;
wherein the content of the first and second substances,
the rotor disk 1 comprises:
a first sub-disc 11 connected to a second sub-disc 13 by a rotor disc adjustment assembly 12, wherein the initial distance between the first sub-disc 11 and the second sub-disc 13The value is a first distance value d1；
A rotor disk adjustment assembly 12, comprising:
the telescopic rod 121 is a hollow cylinder, the inner wall of the telescopic rod is provided with internal threads, one end of the telescopic rod is fixed on the first sub-disc 11, and the other end of the telescopic rod is in threaded connection with one end of the screw rod 122 with external threads;
the motor 123 is connected with the other end of the screw 122 and fixed on the second sub-disc 13, and drives the screw 122 to rotate through rotation of the motor, so that the telescopic rod 121 reciprocates along the axial direction of the screw 122, and thus the distance between the first sub-disc 11 and the second sub-disc 13 changes, and the braking torque of the eddy current retarder changes;
the heat dissipating component 14 includes:
the heat dissipation fins 141 are respectively tightly attached to the first sub-disc 11 and the second sub-disc 13 and used for dissipating heat generated in the braking process;
the fan 142 is arranged above the rotor disc adjusting assembly 12 and controls the heat dissipation capacity of the heat dissipation fins 141 by controlling the rotation speed of the fan impeller;
the data acquisition unit 2 includes:
a speed sensor 21 for detecting a running speed V of the automobile;
an angle sensor 22 for detecting a gradient value α of the road surface;
a distance sensor 23, which is arranged at the intersection of the first sub-disc 11 and the telescopic rod 121, and is used for detecting the distance d between the first sub-disc 11 and the second sub-disc 13;
the control section 3 is configured to:
when the driving speed V of the automobile is less than the standard speed value V0At this time, the distance between the first subdisc and the second subdisc maintains the initial distance value d1The impeller in the fan is controlled to rotate at a first rotating speed value when the running speed V of the automobile is not changed, and when the running speed V of the automobile is larger than a standard speed value V0When the electric eddy current retarder is used, the automobile is indicated to run fast, a larger braking torque needs to be provided at the moment to enhance the braking effect of the electric eddy current retarder, and therefore the control motor rotates to drive the screw rod to rotate, so that the telescopic rod moves along the axis direction of the telescopic rod, and when the telescopic rod moves along the axis direction of the telescopic rod, the electric eddy current retarder worksThe distance sensor detects that the distance d between the first subdisc and the second subdisc is equal to a second distance value d2When the fan is started, the motor is controlled to stop rotating, the braking torque is increased due to the increase of the distance between the first sub-disc and the second sub-disc, so that the heat generated in the braking process is increased, and in order to avoid the reduction of the magnetic conductivity of the rotor disc caused by overheating, the impeller in the fan is controlled to rotate at a second rotating speed value which is larger than the first rotating speed value, wherein d2>d1；
Correcting the distance between the first sub-disc and the second sub-disc to be adjusted and the rotating speed of the impeller according to the slope value alpha of the road surface detected by the angle sensor, and when the slope value alpha of the road surface is larger than the standard slope value alpha0When the road surface is steep, the distance between the first sub-disc and the second sub-disc to be adjusted and the rotating speed of the impeller are not enough to safely brake the automobile, so that the distance between the first sub-disc and the second sub-disc and the rotating speed of the impeller are increased by 10-20%;
wherein the formula is calculated by torque
Figure GDA0002920583800000041
It can be known that an increase in the distance between the first sub disc and the second sub disc results in an increase in the braking torque of the eddy current retarder.
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 (1)

1. A dynamically adjustable eddy current retarder comprises a rotor assembly, a stator assembly and a bracket assembly, and is characterized in that,
the rotor assembly comprises a rotor disc, a data acquisition part and a control part,
the rotor disc comprises a first sub disc, a second sub disc and a heat dissipation assembly, the first sub disc is connected with the second sub disc through the rotor disc adjusting assembly, and in an initial state, the distance between the first sub disc and the second sub disc is a first distance value d1；
The rotor disk adjustment assembly comprises:
the telescopic rod is a hollow cylinder, the inner wall of the telescopic rod is provided with internal threads, one end of the telescopic rod is fixed on the first sub-disc, and the other end of the telescopic rod is connected with a screw rod with external threads;
the motor is connected with the end part of the screw rod and fixed on the second sub-disc, and drives the screw rod to rotate through the rotation of the motor, so that the telescopic rod reciprocates along the axial direction of the screw rod, the distance between the first sub-disc and the second sub-disc is changed, and the braking torque of the eddy current retarder is changed;
the heat dissipation assembly includes:
the radiating fins are respectively attached to the first sub-disc and the second sub-disc and are used for radiating heat generated in the braking process;
the fan is arranged above the rotor disc adjusting assembly and used for adjusting the heat dissipation capacity of the heat dissipation assembly by controlling the rotating speed of the fan;
the data acquisition part comprises:
a speed sensor for detecting a running speed V of the automobile;
an angle sensor for detecting a gradient value α of a road surface;
the distance sensor is arranged at the intersection of the first sub-disc and the telescopic rod and used for detecting the distance d between the first sub-disc and the second sub-disc;
when the driving speed V of the automobile is less than the standard speed value V0When the distance between the first sub-disc and the second sub-disc is kept at the first distance value d1The fan is controlled to rotate at a first rotating speed value unchanged;
when the driving speed V of the automobile is greater than the standard speed value V0When the automobile runs fast, the automobile needs to provide larger braking torque during braking, so that the electricity is controlledThe machine rotates to drive the screw rod to rotate, so that the telescopic rod moves along the axis direction of the telescopic rod, and when the distance sensor detects that the distance d between the first sub-disc and the second sub-disc is equal to the second distance value d2When the motor is controlled to stop rotating, the distance between the first sub-disc and the second sub-disc is increased to cause the brake torque to be increased, so that the heat generated in the brake process is increased, and in order to avoid the reduction of the magnetic conductivity of the rotor disc caused by overheating, the fan is controlled to rotate at a second rotating speed value which is larger than the first rotating speed value, wherein the second distance value d2>First distance value d1；
And correcting the adjustment according to the slope value alpha of the road surface detected by the angle sensor: when the gradient value alpha of the road surface is larger than the standard gradient value alpha0And then, the road surface is steep, and the adjustment is not enough to safely brake the automobile, so that the distance between the first sub-disc and the second sub-disc is increased by 10-20% on the basis of the second distance value, and the rotating speed of the fan is increased by 10-20% on the basis of the second rotating speed value.
CN201810969365.3A 2018-08-23 2018-08-23 Eddy current retarder capable of being dynamically adjusted Active CN109017328B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1512627A (en) * 1974-06-19 1978-06-01 Marldon Ltd Magnetic coupling
US5096024A (en) * 1990-08-10 1992-03-17 Wu Hung Chi Adjustable magnetic brake
CN201254175Y (en) * 2008-07-24 2009-06-10 广东工业大学 Electric eddy speed damper control device
CN201484209U (en) * 2009-07-01 2010-05-26 李江 Eddy current speed reducer
CN106712417A (en) * 2017-03-16 2017-05-24 迈格钠磁动力股份有限公司 Vehicular disk-type permanent magnet eddy current retarder
CN106712449A (en) * 2016-12-22 2017-05-24 安徽沃弗电力科技有限公司 Air-cooled permanent magnet speed regulator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1512627A (en) * 1974-06-19 1978-06-01 Marldon Ltd Magnetic coupling
US5096024A (en) * 1990-08-10 1992-03-17 Wu Hung Chi Adjustable magnetic brake
CN201254175Y (en) * 2008-07-24 2009-06-10 广东工业大学 Electric eddy speed damper control device
CN201484209U (en) * 2009-07-01 2010-05-26 李江 Eddy current speed reducer
CN106712449A (en) * 2016-12-22 2017-05-24 安徽沃弗电力科技有限公司 Air-cooled permanent magnet speed regulator
CN106712417A (en) * 2017-03-16 2017-05-24 迈格钠磁动力股份有限公司 Vehicular disk-type permanent magnet eddy current retarder

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Effective date of registration: 20210810

Address after: 230000 room B-1020, Woye Garden commercial office building, 81 Ganquan Road, Shushan District, Hefei City, Anhui Province

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Patentee after: Funing Aobo Electrical Equipment Co.,Ltd.

Address before: 230000 room B-1020, Woye Garden commercial office building, 81 Ganquan Road, Shushan District, Hefei City, Anhui Province

Patentee before: Hefei Baoma Machinery Design Co.,Ltd.