CN102120424B - Controller and control method of eddy-current retarder of combined braking system - Google Patents
Controller and control method of eddy-current retarder of combined braking system Download PDFInfo
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Abstract
The invention provides a controller and control method of an eddy-current retarder of a combined braking system, relating to automobile eddy-current retarders. The controller comprises a minicomputer, a high-power transistor driving circuit, a braking pedal positioning sensor, a current feedback circuit and an eddy-current retarder combined switch. After a braking pedal is pedaled down, the controller switches off a gear grading control, calculates the size of an automobile real-time braking force and then calculates the gradient of the automobile according to a PWM (Pulse Width Modulation) control signal of the eddy-current retarder, the input of the braking pedal position sensor and the variation of the speed pulse of the automobile, then inquires a proportion of the automobile downslope braking force shared by the eddy-current retarder, which corresponds to the gradient and is prestored in an internal memory, applies a PWM control signal with corresponding duty ratio to an electromagnetic coil of the eddy-current retarder, outputs a certain braking torque, ensures that the eddy-current fully exerts the auxiliary braking effect on different slopes while satisfying normal operation conditions and simultaneously lightens the operation intensity of a driver.
Description
Technical field
The present invention relates to a kind of Vehicle Electronic Control series products, the control of current vortex retarder in the associated braking system that is applicable to being formed by foundation brakes and current vortex retarder in transport vehicle.
Background technology
Press laws and regulations requirement, big-and-middle-sized commerial vehicle must install complemental brake system additional, consumes the brake load of automobile when medium and small degree braking, the thermal load and the contact wear that alleviate automobile primary brake equipment., at automobile lower long slope, continue in braking procedure, complemental brake system can participate in brake action meanwhile, guarantees the brake efficiency of main brake device in emergency braking situation.Current vortex retarder is conventional complemental brake system, but its B.P. is relatively little, and therefore, the brake action of rationally bringing into play fully current vortex retarder can guarantee that automotive safety needs to continue the section of braking rapidly, improves the transport economic specific property of automobile.
Patent 20071002225.0 has proposed " a kind of automobile primary drg and retarder united controller and control method ", its controller carrys out the degree of perception pilot control automobile primary drg by the change in location of brake pedal, judge whether slowing down speed of engine needs participation work, and can correspondingly regulate the lock torque of current vortex retarder.The brake operating of this control method based on chaufeur, first, by the lock torque of preset proportion control current vortex retarder, then carries out limited adjustment according to the variation of the speed of a motor vehicle to the lock torque of current vortex retarder.This control method can effectively alleviate the operation of chaufeur, and shortcoming is that the main brake device of automobile must be born a certain proportion of brake load continuous firing.
Patent 200810020499.7 has proposed " united controller of current vortex retarder and automobile primary drg and control method ", this controller decides current vortex retarder still to jointly control pattern in independent master mode with jointly controlling switch, jointly controlling in pattern wherein, current vortex retarder and automobile primary drg participate in brake action jointly, and the lock torque of current vortex retarder becomes at the lock torque with automobile primary drg on the basis of fixed proportion relation, does the adjustment of certain limit according to the moving velocity of automobile.Continue in braking procedure, the foundation brakes participation work of automobile, is also difficult to give full play to the brake assisting effect of current vortex retarder.
Chinese patent ZL200810022546.1 provides a kind of " Split type electric eddy speed damper controller ", this controller provides current vortex retarder neutral mode, gear pattern, constant speed mode and has jointly controlled pattern, operating result according to chaufeur to all kinds of switches, controller makes current vortex retarder enter different mode of operations.Wherein, in jointly controlling pattern, current vortex retarder is exported lock torque according to the degree of driver's operation brake pedal by fixed proportion.Sort controller has changed traditional controller pattern, be conducive to the design of space layout and different automobile types, but operate cumbersome, and share brake load by fixed proportion, the continuous working period of automobile primary drg also can be long, is difficult to reach alleviate as far as possible foundation brakes contact wear and the object that reduces contact component operating temperature.
Summary of the invention
The controller and the control method that the object of this invention is to provide current vortex retarder in a kind of associated braking system being formed by current vortex retarder and automobile primary drg, chaufeur is according to the environment of living in of automobile, can select manual control combined switch to make controller enter step control pattern to current vortex retarder, or step on brake pedal, controller cuts out step control pattern, and automatically enters and jointly control pattern.
Wherein, controller is when jointly controlling pattern, according to the size of braking force of current vortex retarder and automobile primary drg, the variation of automobile driving speed, first controller identifies the residing road grade of automobile, then according to the gradient, determine the required size of bearing brake load of current vortex retarder, control current vortex retarder and export corresponding lock torque.The residing ramp of the automobile gradient is zero, and current vortex retarder is not born brake load; The residing ramp of the automobile gradient is less than setting value, and current vortex retarder is born whole brake loads; The residing ramp of the automobile gradient is more than or equal to setting value, and current vortex retarder is born and met automobile corresponding proportion part of the brake load of descending at the uniform velocity on ramp, and the brake load large percentage of bearing in the less gradient.In Associated brake pattern, chaufeur as required free brake activation pedal makes the foundation brakes of automobile bring into play corresponding brake action, but when the brake action of automobile primary drg is greater than default degree, controller judgement automobile, in emergency braking condition, forbids that current vortex retarder plays a role.
Object of the present invention can reach by the controller of the following stated:
Controller is comprised of microcomputer, high-power crystal tube drive circuit, current feedback circuit, current vortex retarder combined switch, brake pedal position sensor.Wherein microcomputer comprises input/output end port, internal bus, microcomputer CPU, PWM control unit, two interrupt controllers, electric erasable programmable memory device, A/D converter, read-only memory (ROM), random access memory, counting machine, timer, high-power crystal tube drive circuit comprises optocoupler, igbt, flywheel diode, current feedback circuit comprises sample resistance, precision voltage source, op amp, current vortex retarder combined switch can provide 1, 2, 3, 4 gears are the on-off signal of totally four gears, brake pedal position sensor includes a reset switch and a linear potentiometer.
Four gear output signals of current vortex retarder combined switch and battery tension signal S1 are connected to the input/output end port of microcomputer.The reset switch of brake pedal position sensor is connected to No. 2 interrupt controllers and input/output end port, and the output of linear potentiometer is connected to the input pin of A/D converter.The output of PWM control unit You Si road, every road connects the control end of optocoupler, the grid of the output termination igbt of optocoupler, the drain electrode of igbt connects the negative pole of flywheel diode and the positive pole of storage battery, and the source electrode of igbt connects positive pole and the current vortex retarder coil of flywheel diode.Totally four groups of current vortex retarder coils, all connect battery negative post by sample resistance.In current feedback circuit, sample resistance output connects the negative terminal of op amp, and precision voltage source output connects the anode of op amp, and the output of op amp connects interrupt controller No. 1.The car speed signal of taking from instrument carrier panel connects the input end of the counting machine of microcomputer.
Advantage of the present invention is that chaufeur can be according to the operation conditions of automobile and the residing road conditions of automobile, freely select manual mode or foot-propelled mode to control current vortex retarder, and the conversion of two kinds of modes is that the open and-shut mode by switch completes automatically by controller in chaufeur course of normal operation.When current vortex retarder is when jointly controlling pattern, can according to the size of road gradient change share meet the at the uniform velocity ratio of the brake load of descending of automobile, give full play to the brake assisting effect as complemental brake system, alleviate the thermal load of automobile primary drg.Meanwhile, chaufeur is the foundation brakes of individual operation automobile according to circumstances, the moving velocity of vehicles.
Accompanying drawing explanation
Fig. 1 is the block diagram of controller of current vortex retarder of the present invention.
Fig. 2 is the control method main flow chart of controller of current vortex retarder of the present invention.
Fig. 3 is the step control pattern subroutine flow chart of controller of current vortex retarder of the present invention.
Fig. 4 is that the external interrupt of controller of current vortex retarder of the present invention is served 1 diagram of circuit.
Fig. 5 is that the external interrupt of controller of current vortex retarder of the present invention is served 2 diagram of circuits.
Fig. 6 be controller of current vortex retarder of the present invention jointly control pattern subroutine flow chart.
Fig. 7 is the Interruption service procedure figure of controller of current vortex retarder of the present invention.
Fig. 8 is the brake load ratio of current vortex retarder of the present invention and the relation of road grade.
Attached figure labeling description: 1-current vortex retarder combined switch 2-input/output end port 3-internal bus 4-microcomputer CPU5-controller of current vortex retarder 6-microcomputer 7-PWM control unit 8-optocoupler 9-igbt 10-flywheel diode 11-current vortex retarder coil 12-sample resistance 13-precision voltage source 14-op amp 15-1 interrupt controller 16-electric erasable programmable memory device 17-2 interrupt controller 18-A/D converter 19-read-only memory (ROM) 20-random access memory 21-counting machine 22-brake pedal position sensor 23-timer
The specific embodiment
Below in conjunction with Fig. 1, combined control system controller of current vortex retarder circuit structure of the present invention is described:
As shown in Figure 1, associated braking system controller of current vortex retarder is comprised of microcomputer 6, high-power crystal tube drive circuit, current feedback circuit, current vortex retarder combined switch 1, brake pedal position sensor 22.Wherein microcomputer 6 comprises input/output end port 2, internal bus 3, microcomputer CPU4, PWM control unit 7, No. 1 interrupt controller 15, No. 2 interrupt controllers 17, electric erasable programmable memory device 16, A/D converter 18, read-only memory (ROM) 19, random access memory 20, counting machine 21, timer 23, high-power crystal tube drive circuit comprises optocoupler 8, igbt 9, flywheel diode 10, current feedback circuit comprises sample resistance 12, precision voltage source 13, op amp 14, current vortex retarder combined switch 1 can provide 1, 2, 3, 4 gears are the on-off signal of totally four gears, brake pedal position sensor 22 includes a reset switch and a linear potentiometer.
In Fig. 1, four gear output signals of current vortex retarder combined switch 1 and battery tension signal S1 are connected to the input/output end port 2 of microcomputer 6.The reset switch of brake pedal position sensor 22 is connected to No. 2 interrupt controllers 17 and input/output end port 2, and the output of linear potentiometer is connected to the input pin of A/D converter 18.The 7 You Si road outputs of PWM control unit, every road connects the control end of optocoupler 8, the grid of the output termination igbt 9 of optocoupler 8, the drain electrode of igbt 9 connects the negative pole of flywheel diode 10 and the positive pole of storage battery, and the source electrode of igbt 9 connects positive pole and the current vortex retarder coil 11 of flywheel diode 10.Totally four groups of current vortex retarder coils 11, all connect battery negative post by sample resistance 12.Sample resistance 12 outputs in current feedback circuit connect the negative terminal of op amp 14, and precision voltage source output connects the anode of op amp 14, and the output of op amp 14 connects interrupt controller 15 No. 1.The car speed signal of taking from instrument carrier panel connects the input end of the counting machine 21 of microcomputer 6.
The input/output end port 2 of microcomputer 6 receives the digital signals such as reset switch in gear from current vortex retarder combined switch 1, storage battery low voltage signal S1, brake pedal position sensor 22, through internal bus 3, deliver to microcomputer CPU4, after computing, obtain the voltage status of operation information and the storage battery of chaufeur, be controller to current vortex retarder carry out lock torque control according to one of.
The counting machine 21 of microcomputer 6, under the cooperation of timer 23, records the car speed pulse count in certain hour, and with together with count results in the upper time period, calculates pickup.
The signal intensity of reset switch in No. 2 interrupt controllers 17 monitors brake pedal position transdusers 22 of microcomputer 6.When chaufeur is stepped on brake pedal, reset switch is opened, the level that No. 2 interrupt controller perception carry out self-resetting switch variation from high to low, and microcomputer 6 proceeds to current vortex retarder to jointly control pattern, and forbids step control pattern.
Current feedback circuit is inputted the op amp 14 of device as a comparison by the VREF (Voltage Reference) of the loss in voltage on sample resistance 12 and precision voltage source 13, No. 1 interrupt controller 15 of comparative result access.As the VREF (Voltage Reference) of the loss in voltage on sample resistance 12 higher than precision voltage source 13, there is external interrupt in microcomputer 6, cuts off the pwm pulse control signal of current vortex retarder.
Read-only memory (ROM) 19 in microcomputer 6 is deposited program code of the present invention and automobile at the uniform velocity the brake load ratio of current vortex retarder and the relation in ramp during descending, and electric erasable programmable memory device 16 is deposited some intermediate operations results in program operation process.
Associated braking system controller of current vortex retarder of the present invention is provided with two kinds of mode of operations to current vortex retarder: the one, and step control pattern, controller is according to 1,2,3,4 gears of the selected current vortex retarder combined switch 1 of chaufeur, and the PWM that current vortex retarder is carried out to corresponding dutycycle controls; The 2nd, jointly control pattern, controller is after chaufeur is stepped on brake pedal reset switch in brake pedal position sensor 22 is opened, make current vortex retarder coordinate the work of automobile primary drg, the size of its lock torque and the automobile brake load that at the uniform velocity current vortex retarder be should bear during descending is consistent.
On automobile, dress is with after associated braking system controller of current vortex retarder of the present invention, the in the situation that chaufeur being braked at needs, only need select the gear of current vortex retarder or step on brake pedal, controller is controlled the lock torque of current vortex retarder by program prepared in advance according to the residing working environment of automobile.
The control method of associated braking system current vortex retarder of the present invention realizes by carrying out the program of following establishment.
As shown in Figure 2, associated braking system controller of current vortex retarder is carried out following main program after powering on.
(1) associated braking system controller of current vortex retarder 5 starts to carry out main program from step 200.
(2) then enter the input/output end port distribution that step 201 is carried out microcomputer, by resource distribution, it need to be set and input or output state.
(3) enter step 202 and carry out timer sum counter initialization setting.
(4) enter the initialization setting that step 203 is carried out interrupt controller.
(5) enter the initialization setting that step 204 is carried out PWM control unit.
(6) enter step 205 and remove EEPROM space, be used for preserving results of intermediate calculations.
(7), when main program is carried out step 206, be loop head.Whether the control electric current that first judges current vortex retarder magnet coil is excessive.If electric current is excessive, jumps to step 212 and carry out abnormal condition processing; Otherwise carry out in order next step operation.
(8) step 207 place, microcomputer extracts input port information.
(9) step 208, microcomputer is processed input port information, calculates the gear coding of chaufeur to the operation of current vortex retarder combined switch, and is kept in EEPROM.
(10) the gear coding that the judgement of step 209 place is calculated has unchanged.If no, show that chaufeur does not have to change the operation to current vortex retarder combined switch, step 206 loop head place is gone back in program redirect; Otherwise carry out in order next step operation.
(11) step 210 place judgement battery tension situation, if battery tension is too low, program jumps to step 212 place and carries out abnormal condition processing; Otherwise program enters into step 211 in order, call the step control pattern subprogram of controller of current vortex retarder.Called after this subprogram, program jumps to the execution circulating in step 206 loop head place next time.
(12) step 212 place carries out abnormal condition processing, is specially the pwm control signal of removing current vortex retarder magnet coil, makes the lock torque of current vortex retarder be output as zero.Then enter step 213, remove the gear coding of having preserved.After abnormal condition are handled, program jumps to the execution circulating in step 206 loop head place next time.
As shown in Figure 3, associated braking system controller of current vortex retarder calls step control pattern subprogram:
(1) subprogram starts to carry out from step 300.
(2) enter step 301, controller is the operation to current vortex retarder combined switch according to gear coding judgement chaufeur, identification 1,2,3,4 gear or neutrals.
(3) enter step 302, controller, according to different gear operations, applies corresponding PWM control wave to current vortex retarder magnet coil, makes current vortex retarder export corresponding lock torque.
(4) enter step 303, the subroutine call of step control pattern is returned.
As shown in Figure 4, associated braking system controller of current vortex retarder is carried out external interrupt and is served 1 program:
Controller of current vortex retarder is when the main program shown in execution graph 2, and as the signal from current feedback circuit meets interrupt condition, controller enters external interrupt and serves 1 program.
(1) external interrupt 1 program of serving starts to carry out from step 400.
(2) enter step 401, microcomputer is closed external interrupt 1.
(3) enter step 402, microcomputer is removed the pwm control signal of current vortex retarder magnet coil, makes the lock torque of current vortex retarder be output as zero.
(4) enter step 403, microcomputer is set up the excessive zone bit of current vortex retarder solenoid current.
(5) enter step 404, microcomputer reopens external interrupt 1.
(6) enter step 405, program is returned from external interrupt service 1, continues to carry out main program.
As shown in Figure 5, associated braking system controller of current vortex retarder is carried out external interrupt and is served 2 programs:
Controller of current vortex retarder, when the main program shown in execution graph 2, is stepped on brake pedal as chaufeur, and the reset switch in brake pedal position sensor is disconnected, and signal meets interrupt condition, and controller enters external interrupt and serves 2 programs.
(1) external interrupt 2 programs of serving start to carry out from step 500.
(2) enter step 501, microcomputer is closed external interrupt 2.
(3) enter step 502, microcomputer is removed the pwm control signal of current vortex retarder magnet coil, makes the lock torque of current vortex retarder be output as zero.
(4) call and jointly control pattern subprogram at step 503 place.
(5) carry out and carry out to step 504 place the judgement whether brake pedal resets.As brake pedal does not reset, show that Associated brake pattern does not finish, program jumps to step 503 place and continues; Otherwise program proceeds to next step in order.
(6) enter step 505, microcomputer is opened external interrupt 2.
(7) enter step 506, program is returned from external interrupt 2 programs of serving.
As shown in Figure 6, associated braking system controller of current vortex retarder calls and jointly controls pattern subprogram:
(1) jointly controlling pattern subprogram starts to carry out from step 600.
(2) enter step 601, microcomputer is got the dutycycle of current current vortex retarder magnet coil pwm control signal.
(3) enter step 602, the braking force of current vortex retarder when microcomputer calculates corresponding dutycycle.
(4) enter step 603, microcomputer is stepped on the degree of brake pedal by A/D converter chaufeur.
(5) enter step 604, according to previous step result, calculate the braking force of automobile primary drg.
(6) step 605 place judges, whether the braking force of automobile primary drg is greater than setting value.As be greater than, program jumps to step 609 place and carries out; Otherwise enter in order next step.
(7) enter step 606, microcomputer obtains the accekeration of current automobile from internal random memory device.
(8) enter step 607, according to mechanics principle, calculate the ratio of slope in automobile ramp of living in.
(9) step 608 place judges, whether the residing gradient of automobile is zero.In this way, program execution step 609, the pwm control signal of removing current vortex retarder magnet coil, makes the lock torque of current vortex retarder be output as zero; Otherwise program execution step 610.
(10) first see step 610.Microcomputer inquiry read-only memory (ROM), finds the ratio of the corresponding automobile brake load that at the uniform velocity current vortex retarder be should bear during descending according to known ratio of slope.
(11) enter step 611, calculate and export the dutycycle of current vortex retarder magnet coil pwm control signal, make current vortex retarder export the lock torque of corresponding brake load ratio.
(12) enter step 612.After being finished, step 609 also enters this step.This step is preserved the dutycycle of current vortex retarder magnet coil pwm control signal in random access memory.
(13) enter step 613, jointly control pattern subroutine call and return.
As shown in Figure 7, associated braking system controller of current vortex retarder is carried out Interruption service routine:
(1) Interruption service routine starts to carry out from step 700.
(2) enter step 701, timeing closing interrupts.
(3) enter step 702, microcomputer obtains the count results of car speed impulse singla from counting machine.
(4) enter step 703, calculate the speed of current automobile.
(5) enter step 704, get car speed on last stage.
(6) enter step 705, calculate the acceleration/accel of automobile.
(7) enter step 706, pickup result is kept in random access memory.
(8) enter step 707, car speed is also kept in random access memory.
(9) enter step 708, Open Timer is interrupted.
(10) enter step 709, from timing services program interrupt, return.
Fig. 8 is automobile while at the uniform velocity travelling, the brake load ratio that current vortex retarder is born and the corresponding relation of the automobile gradient of living in.
Fig. 8 demonstration, when the automobile gradient of living in is less than certain value, whole ratios of brake load when current vortex retarder is born automobile downhill, and while being more than or equal to this value, the ratio of the brake load that current vortex retarder is born is with change in road slope, the gradient hour, large percentage.
Claims (7)
1. an associated braking system controller of current vortex retarder, is characterized in that: controller is by microcomputer (6), high-power crystal tube drive circuit, current feedback circuit, current vortex retarder combined switch (1), brake pedal position sensor (22) forms, and wherein microcomputer (6) comprises input/output end port (2), internal bus (3), microcomputer CPU (4), PWM control unit (7), No. 1 interrupt controller (15), No. 2 interrupt controllers (17), electric erasable programmable memory device (16), A/D converter (18), read-only memory (ROM) (19), random access memory (20), counting machine (21), timer (23), high-power crystal tube drive circuit comprises optocoupler (8), igbt (9), flywheel diode (10), current feedback circuit comprises sample resistance (12), precision voltage source (13), op amp (14), current vortex retarder combined switch (1) can provide 1, 2, 3, 4 gears are the on-off signal of totally four gears, and brake pedal position sensor (22) includes a reset switch and a linear potentiometer,
Four gear output signals of current vortex retarder combined switch (1) and battery tension signal S1 are connected to the input/output end port (2) of microcomputer (6); The reset switch of brake pedal position sensor (22) is connected to No. 2 interrupt controllers (17) and input/output end port (2), and the output of linear potentiometer is connected to the input pin of A/D converter (18); The output of PWM control unit (7) You Si road, every road connects the control end of optocoupler (8), the grid of the output termination igbt (9) of optocoupler (8), the drain electrode of igbt (9) connects the negative pole of flywheel diode (10) and the positive pole of storage battery, and the source electrode of igbt (9) connects positive pole and the current vortex retarder coil (11) of flywheel diode (10); Totally four groups of current vortex retarder coils (11), all pass through sample resistance (12) and connect battery negative post; In current feedback circuit, sample resistance (12) output connects the negative terminal of op amp (14), and precision voltage source output connects the anode of op amp (14), and the output of op amp (14) connects No. 1 interrupt controller (15); The car speed signal of taking from instrument carrier panel connects the input end of the counting machine (21) of microcomputer (6).
2. the control method of an associated braking system current vortex retarder, it is characterized in that: controller of current vortex retarder (5) can make current vortex retarder work in step control pattern and jointly control pattern, and while jointly controlling pattern execution, step control pattern is prohibited; Controller of current vortex retarder (5), after chaufeur is stepped on reset switch that brake pedal makes brake pedal position sensor (22) and opened, enters and jointly controls pattern, and close step control pattern; Current vortex retarder enters and jointly controls after pattern, controller of current vortex retarder (5) according to gradient size distribute current vortex retarder bear brake load ratio number.
3. the control method of associated braking system current vortex retarder according to claim 2, it is characterized in that: step control pattern is that controller of current vortex retarder (5) is accordingly determined the control wave of dutycycle to the gear operation of current vortex retarder combined switch (1) to igbt (9) output according to chaufeur, makes current vortex retarder export certain lock torque.
4. the control method of associated braking system current vortex retarder according to claim 2, it is characterized in that: jointly control pattern and be controller of current vortex retarder (5) after chaufeur is stepped on reset switch that brake pedal makes brake pedal position sensor (22) and opened, microcomputer (6) obtains the dutycycle of current vortex retarder control signal by PWM control unit, A/D converter (18) extracts the input of brake pedal position sensor (22), counting machine (21) and timer (23) calculate the variation of car speed pulse, first calculate the size of automobile actual braking force, then calculate the residing gradient of automobile, inquire to be again pre-stored in and in inner read-only memory (ROM) (19), be worth corresponding current vortex retarder with ramp and share the at the uniform velocity ratio of downhill braking power of automobile, current vortex retarder coil (11) is applied to the pwm control signal of corresponding dutycycle, export certain lock torque, while making current vortex retarder meet normal operating conditions, on different ramps, bring into play its brake assisting effect completely.
5. the control method of associated braking system current vortex retarder according to claim 4, it is characterized in that: controller of current vortex retarder (5) enters and jointly controls after pattern, if automobile ramp of living in value is zero, controller of current vortex retarder (5) is controlled current vortex retarder braking force is not provided.
6. the control method of associated braking system current vortex retarder according to claim 4, it is characterized in that: controller of current vortex retarder (5) enters and jointly controls after pattern, if automobile ramp of living in is less than the value of setting, by current vortex retarder, provide automobile required braking force.
7. the control method of associated braking system current vortex retarder according to claim 4, it is characterized in that: controller of current vortex retarder (5) enters and jointly controls after pattern, when the input numerical value of brake pedal position sensor (22) surpasses certain numerical value, make current vortex retarder that braking force is not provided.
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| CN201010590330.2A CN102120424B (en) | 2010-12-09 | 2010-12-09 | Controller and control method of eddy-current retarder of combined braking system |
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| CN201010590330.2A CN102120424B (en) | 2010-12-09 | 2010-12-09 | Controller and control method of eddy-current retarder of combined braking system |
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| CN103089857B (en) * | 2012-12-17 | 2015-06-10 | 江苏大学 | Brake integrating rotary barrel type eddy current retarder and drum brake |
| CN103326536B (en) * | 2013-07-03 | 2016-08-10 | 江苏大学 | A kind of employing coil and permanent magnet hybrid excitation type eddy current retarder |
| CN104802649B (en) * | 2015-03-17 | 2018-08-17 | 合肥协力仪表控制技术股份有限公司 | A kind of controller of current vortex retarder |
| CN110539644B (en) * | 2019-09-18 | 2023-01-06 | 南京丁博控制器有限公司 | Eddy current retarding system for automobile |
| CN114179623B (en) * | 2020-09-15 | 2023-07-07 | 宇通客车股份有限公司 | Electric braking method and system for vehicle |
| CN113389859B (en) * | 2021-05-31 | 2023-04-25 | 浙江师范大学 | Wind generating set prediction type constant speed box system and constant speed control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS60167602A (en) * | 1984-02-06 | 1985-08-31 | Hitachi Ltd | Eddy current controller of electric railcar |
| FR2591297B1 (en) * | 1985-12-06 | 1990-03-30 | Renault Vehicules Ind | RETARDER CLUTCH. |
| CN101030754A (en) * | 2007-02-12 | 2007-09-05 | 盐城市步高汽配制造有限公司 | Stepless torque braking controller of electric vortex speed releaser |
| CN101239589A (en) * | 2008-03-10 | 2008-08-13 | 江苏大学 | Electric eddy speed damper and vehicle friction brake combined controller and control method |
| CN100593482C (en) * | 2008-08-15 | 2010-03-10 | 浙江师范大学 | Split type electric eddy speed damper controller |
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