CN101030754A - Stepless torque braking controller of electric vortex speed releaser - Google Patents

Stepless torque braking controller of electric vortex speed releaser Download PDF

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Publication number
CN101030754A
CN101030754A CN 200710020365 CN200710020365A CN101030754A CN 101030754 A CN101030754 A CN 101030754A CN 200710020365 CN200710020365 CN 200710020365 CN 200710020365 A CN200710020365 A CN 200710020365A CN 101030754 A CN101030754 A CN 101030754A
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CN
China
Prior art keywords
signal
circuit
output
chip
driving
Prior art date
Application number
CN 200710020365
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Chinese (zh)
Inventor
何仁
赵迎生
陈步高
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盐城市步高汽配制造有限公司
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Application filed by 盐城市步高汽配制造有限公司 filed Critical 盐城市步高汽配制造有限公司
Priority to CN 200710020365 priority Critical patent/CN101030754A/en
Publication of CN101030754A publication Critical patent/CN101030754A/en

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Abstract

The invention is concerned with the eddy current slow-speed braking moment stepless controller, consists of: the microcomputer (-), the drive chip (-), the power switch module (-), the current feedback testing circuit (-), the voltage feedback testing circuit (-), the eddy current slow-speed excitation coil (-), the voice alarm circuit (-), and the light alarm circuit (-); the input / output interface (-) of the microcomputer (-) receives the feedback signal, the CPU (-) operates and output the pulse width modulation signal or the alarm signal; the pulse width modulation signal controls the four group of eddy current slow-speed excitation coil (-) by the drive chip and the power switch module, the alarm signal drives the voice alarm circuit (-) and the light alarm circuit (-), the circuit of each group eddy current slow-speed excitation coil (-) sets the testing circuit.

Description

A kind of stepless torque braking controller of electric vortex speed releaser
Technical field
The present invention relates to a kind of controller that is used for the current vortex retarder of automobile, especially a kind of stepless torque braking controller of electric vortex speed releaser of suitable vehicle.
Background technology
Be contained in current vortex retarder on the highway transport vehicle at present usually with the controller of two kinds of forms, i.e. grading control and stepless controller, these two kinds of controllers are consistent to the requirement of the body of current vortex retarder.The current vortex retarder stationary part has 8 magnet exciting coils, is divided into four groups of in parallel uses.Stator is fixed on the housing by support, and housing is fixed by bolts on the vehicle frame.The rotor of current vortex retarder is middle or two ends at stator, and are serially connected on the power transmission shaft.
The grading control of current vortex retarder is divided into four groups with the stator winding of current vortex retarder usually, and every group is provided with relay and whether controls its work.When the driver carries out retarding braking or lower long slope when carrying out holding braking in long distance, can pass through the conducting successively of Foot-controlled switch or four relays of manual switch control of fourth gear, as shown in Figure 2, current vortex retarder is progressively increased the number of the magnet exciting coil of work, the output torque that makes retarder increases with the gear of control switch, referring to Fig. 3.
There are the following problems for the grading control of current vortex retarder: 1, when the control switch gear change, because of magnet exciting coil divides four groups progressively to participate in work, the work probability difference that each organizes coil influences average length of working life of coil; 2, respectively organize the work probability difference of magnet exciting coil, can cause the heating of coil unbalanced, also can influence the working life of coil; 3, because magnet exciting coil is controlled by relay, or participation work, or do not participate in work, and cause the output torque of current vortex retarder to be the step variation, influence the braking stationarity of automobile; 4, the work of current vortex retarder needs the driver to operate, and has increased driver's labour intensity; 5, in use ablate easily in the contact of relay.
At present, the stepless control of current vortex retarder adopts the PWM waveform generator to control high-power switch tube by photoelectrical coupler, thus the average operating current in the control current vortex retarder magnet exciting coil.Adopt this method, though high-power switch tube lifting of voltage when opening and turn-offing changes the shape that can change original pwm waveform, the frequency of its switch is consistent with pwm control signal.Because the repetition rate of PWM is higher, the duty ratio of regulating the PWM waveform can make the output torque of current vortex retarder become stepless variation, makes automobile obtain braking stably.But there are the following problems usually for the stepless control mode of this current vortex retarder: 1, owing to require automatic control degree higher, the difficulty of realization increases; 2, do not consider the characteristic of current vortex retarder own, be the moment of current vortex retarder and the thermodynamic behaviour that rotating speed is non-linear relation and current vortex retarder, cause the operating efficiency of current vortex retarder bigger with the gap of control effect and desired design; 3, only current vortex retarder itself is implemented Torque Control, and not and other brake apparatus implement together to jointly control, still need the driver to operate, and since stepless when control current vortex retarder the not obvious judgement difficulty that has increased driver's operation of moment variations.
Summary of the invention
The objective of the invention is to: a series of problems at the stepless torque braking controller of electric vortex speed releaser of present use exposes in actual applications provide a kind of new stepless torque braking controller of electric vortex speed releaser.
The object of the present invention is achieved like this: a kind of stepless torque braking controller of electric vortex speed releaser, it is characterized in that: stepless torque braking controller of electric vortex speed releaser is by microcomputer (1), chip for driving (7), power switch module (10), current feedback testing circuit (8), Voltage Feedback testing circuit (9), current vortex retarder magnet exciting coil (14) and sound alarm circuit (6) and optical alarm circuit (5) are formed, the input/output interface (2) of microcomputer (1) receives required various supervisory signals, through output pulse width modulation signal or alarm signal again after central processor CPU (3) computing, wherein: described various supervisory signals comprise the output feedback signal S1~S4 of chip for driving (7), road speed S5, braking pressure S6, eddy current retarder rotor dish temperature S7, accelerator pedal signal S8, ABS signal S9 and storage battery low voltage signal S10; Described output four road pulse-width signals are controlled four groups of current vortex retarder magnet exciting coils (14) by chip for driving (7) respectively by power switch module (10); Described alarm signal drives sound alarm circuit (6) and optical alarm circuit (5) respectively; Be provided with current detection circuit (8) and voltage detecting circuit (9) in the circuit of every group of current vortex retarder magnet exciting coil (14), testing result feeds back to chip for driving (7).
In the present invention: in the described supervisory signal: road speed S5 is the square wave that frequency is directly proportional with road speed, the analog voltage signal of braking pressure S6 for being directly proportional with brake-pipe pressure, the analog voltage signal of eddy current retarder rotor dish temperature S7 for being directly proportional with the rotor disk temperature, and accelerator pedal signal S8, ABS signal S9 and storage battery low voltage signal S10 are switching signal, and wherein: braking pressure S6 and eddy current retarder rotor dish temperature S7 touch the input of number conversion interface from second function of input/output interface; Described power switch module (10) is selected power field effect pipe.
In the present invention: the input and output side of described power switch module (10) is parallel with the capacitance-resistance protective circuit of diode.
In the present invention: the current detection circuit (8) of enforcement overcurrent, overvoltage protection and the output of voltage detecting circuit (9) are connected on the input of chip for driving (7).
The invention has the advantages that: the size of adjusting the duty ratio of control signal PWM in real time according to output feedback signal and road speed, braking pressure, eddy current retarder rotor dish temperature, accelerator pedal signal, ABS signal and the low voltage signal of chip for driving by microcomputer, make the size of ground, automobile front and back braking force be fit to desirable braking force distribution, guarantee the stability of automobile brake, in case occur unusually, microcomputer can drive sound alarm circuit (6) warning circuit and optical alarm circuit (5) respectively by alarm signal.
Description of drawings
Fig. 1 is the fundamental diagram of stepless torque braking controller of electric vortex speed releaser of the present invention.
Fig. 2 is the logic schematic diagram of chip for driving among the present invention.
Fig. 3 is the logic block-diagram of microcomputer among the present invention.
Fig. 4 the present invention takes the design sketch controlled to eddy current retarder rotor dish temperature.
Fig. 5 the present invention is ground, automobile front and back brake-power distribution chart when brake hard.
In the accompanying drawing: 1, microcomputer; 2, input/output interface; 3, CPU; 4, internal bus; 5, indicator light; 6, buzzer; 7, chip for driving; 8, current detection circuit; 9, voltage detecting circuit; 10, power switch module; 11, diode; 12, resistance, 13, electric capacity, 14, the current vortex retarder magnet exciting coil, 15, random asccess memory, 16, read-only memory; S1~S4, chip for driving IC output feedback signal; S5, road speed signal; S6, braking pressure signal; S7, rotor disk temperature signal; S8, accelerator pedal signal; S9, ABS signal; S10, storage battery low voltage signal.
Embodiment
Accompanying drawing discloses the execution mode of specific embodiments of the invention without limitation, below in conjunction with accompanying drawing the present invention is done to describe further.
As seen from Figure 1, stepless torque braking controller of electric vortex speed releaser comprises: microcomputer 1, chip for driving 7, power switch module 10, current feedback testing circuit 8, Voltage Feedback testing circuit 9, current vortex retarder magnet exciting coil 14 and sound alarm circuit 6 and optical alarm circuit 5 are formed, described microcomputer 1 contains central processor CPU 3, internal data bus 4, input/output interface 2 and random asccess memory 15, read-only memory 16, in the work, input/output interface 2 by microcomputer 1 receives required various supervisory signals, by internal data bus 4 by central processor CPU 3 computings after output pulse width modulation signal or alarm signal again, wherein: described various supervisory signals comprise the output feedback signal S1~S4 of chip for driving 7, road speed S5 (square wave that frequency is directly proportional with road speed), braking pressure S6 (the analog voltage signal that is directly proportional with brake-pipe pressure, touch the input of number conversion interface from second function of input/output interface), eddy current retarder rotor dish temperature S7 (analog voltage signal that is directly proportional with the rotor disk temperature is touched the input of number conversion interface from second function of input/output interface), accelerator pedal signal S8 (switching signal), ABS signal S9 (switching signal) and storage battery low voltage signal S10 (switching signal); Described output four road pulse-width signals are controlled four groups of current vortex retarder magnet exciting coils 14 by chip for driving IC 7 respectively by power switch module 10; The alarm signal of microcomputer 1 output drives sound alarm circuit 6 and optical alarm circuit 5 respectively; Be provided with current detection circuit 8 and voltage detecting circuit 9 in the circuit of every group of current vortex retarder magnet exciting coil 14, testing result feeds back to chip for driving 7.In the present embodiment, described chip for driving 7 is selected UC1852, and power switch module 10 is selected power field effect pipe IRF3205, simultaneously, by what resistance 12 and diode 11 were formed the capacitance-resistance protective circuit of diode is arranged in the parallel connection of power field effect pipe input and output side.
During the IC chip UC1852 (frame of broken lines) of the chip for driving 7 that the present invention adopts uses as shown among Fig. 2: the voltage of automobile storage battery is through rising coil and capacitance-resistance diode booster circuit is received the 7th pin, for chip for driving 7 provides power supply.Control signal PWM guides to inner PWM comparator through pin 8COMP end, the output of PWM comparator is received the reset terminal of inner rest-set flip-flop, when pwm control signal is high level, the Q output of rest-set flip-flop is a high level, pwm control signal can be received the 6th pin output output by amplifier thus, with the power controlling field effect transistor.The output of outside voltage detecting circuit inserts first pin of chip for driving 7, also can be connected to inner rest-set flip-flop behind the internal error amplifier.When overtension, the output of the control signal of chip for driving 7 ends.The output of outside current detection circuit inserts second pin of chip for driving, in case the outside is short-circuited or overcurrent, the output of chip for driving 7 control all can be ended by inner rest-set flip-flop.
As seen from Figure 3: the microcomputer 1 that embodiments of the invention adopt comprises a CPU core, the inner ROM of 16KB, the 512B internal RAM, 2 16 bit timings/counters, 6 road A/D converter ADC, 2 road PWM output signals, a serial UART transceiver, (P0~P3) grade can be utilized resource on the sheet to 32 I/O ports.The design's program is curable in inner ROM, and various signals are sent to CPU core by I/O (I/O) mouth through internal bus.In the present embodiment: braking pressure S6 and eddy current retarder rotor dish temperature S7 enter second function from input/output interface P0 and touch the number conversion interface, and accelerator pedal signal S8, ABS signal S9 and storage battery low voltage signal S10 import from input/output interface P1, alarm signal is exported from input/output interface P1, result of calculation is by PWM0 output pin controlling and driving chip 7, and the feedback signal S1 of chip for driving 7~S4 imports from input/output interface P2.Alarm signal by input/output interface P1 output drives sound alarm circuit 6 and optical alarm circuit 5.
The course of work of the present invention is: microcomputer 1 detects the rate signal S5 and the braking pressure signal S6 of automobile, and calculate the instantaneous acceleration of automobile by road speed signal S5, again in conjunction with the intrinsic parameter of automobile, calculate the size of the braking force of automobile needs, in time convert the pwm control signal of suitable duty ratio to, be transferred to the break-make that chip for driving 7 is controlled each power field effect pipes through internal bus by input/output interface 2, thereby the control current vortex retarder is respectively organized the average current in the magnet exciting coil 14.Detailed process is as follows:
When microcomputer 1 detects one of following situation, be 0 pwm control signal by input/output interface 2 output duty cycles, it is 0 that the result can make the output torque of current vortex retarder:
1, the road speed S5 of automobile is higher or lower than the boundary value of setting;
2, the accelerator pedal S8 of automobile is operated;
3, the signal S9 that trackslips of the automobile driving wheel that sends of abs controller;
4, the voltage S10 of automobile storage battery is lower than set point.
When the temperature S7 that detects the rotor disk of current vortex retarder when microcomputer 1 is higher than the boundary value of setting, can export the pwm signal of less duty ratio, make the moment output of current vortex retarder less, can be not too high with the temperature of the rotor disk that guarantees current vortex retarder.
When microcomputer 1 is in the brake hard operating mode by S6 acquisition automobile, adjust the size of the duty ratio of control signal PWM in real time, make the size of ground, automobile front and back braking force be fit to desirable braking force distribution, guarantee the stability of automobile brake.
In order to protect magnet exciting coil 14 loops to exempt from overcurrent, overvoltage infringement; current detection circuit 8 and voltage detecting loop 9 have been set up at the output of power field effect pipe; and testing result is fed back to the input/output interface 2 of microcomputer 1 by the output of chip for driving 7; when feedback signal is in low level state for a long time; microcomputer 1 is 0 pwm control signal by input/output interface 2 output duty cycles, and making the current vortex retarder output torque is 0.
When in four groups of coils of current vortex retarder arbitrary group short circuit, operating voltage occur and cross when low or too high, current detection circuit and voltage detecting loop may command chip for driving 7, making its output no longer is the certain pwm control signal of being exported by microcomputer 1 of duty ratio, but low level signal, and microcomputer 1 is when receiving this low level signal, can send alarm signal and drive sound alarm circuit 6 and optical alarm circuit 5 respectively, the wire loop that the indication current vortex retarder breaks down.
As seen from Figure 4, when the temperature S7 that detects the rotor disk of current vortex retarder when microcomputer 1 is higher than the boundary value of setting, can export the pwm signal of less duty ratio, make the moment output of current vortex retarder less, remain within the scope of setting with the temperature of the rotor disk that guarantees current vortex retarder.
As seen from Figure 5, when automobile is in the brake hard operating mode,, make the size of ground, automobile front and back braking force be fit to desirable braking force distribution, guarantee the stability of automobile brake by the microcomputer 1 real-time size of adjusting the duty ratio of control signal PWM.

Claims (4)

1, a kind of stepless torque braking controller of electric vortex speed releaser, it is characterized in that: stepless torque braking controller of electric vortex speed releaser is by microcomputer (1), chip for driving (7), power switch module (10), current feedback testing circuit (8), Voltage Feedback testing circuit (9), current vortex retarder magnet exciting coil (14) and sound alarm circuit (6) and optical alarm circuit (5) are formed, the input/output interface (2) of microcomputer (1) receives required various supervisory signals, through output pulse width modulation signal or alarm signal again after central processor CPU (3) computing, wherein: described various supervisory signals comprise the output feedback signal S1~S4 of chip for driving (7), road speed S5, braking pressure S6, eddy current retarder rotor dish temperature S7, accelerator pedal signal S8, ABS signal S9 and storage battery low voltage signal S10; Described output four road pulse-width signals are controlled four groups of current vortex retarder magnet exciting coils (14) by chip for driving (7) respectively by power switch module (10); Described alarm signal drives sound alarm circuit (6) and optical alarm circuit (5) respectively; Be provided with current detection circuit (8) and voltage detecting circuit (9) in the circuit of every group of current vortex retarder magnet exciting coil (14), testing result feeds back to chip for driving (7).
2, stepless torque braking controller of electric vortex speed releaser according to claim 1, it is characterized in that: in the described supervisory signal: road speed S5 is the square wave that frequency is directly proportional with road speed, the analog voltage signal of braking pressure S6 for being directly proportional with brake-pipe pressure, the analog voltage signal of eddy current retarder rotor dish temperature S7 for being directly proportional with the rotor disk temperature, and accelerator pedal signal S8, ABS signal S9 and storage battery low voltage signal S10 are switching signal, and wherein: braking pressure S6 and eddy current retarder rotor dish temperature S7 touch the input of number conversion interface from second function of input/output interface; Described power switch module (10) is selected power field effect pipe.
3, stepless torque braking controller of electric vortex speed releaser according to claim 2 is characterized in that: the input and output side of described power switch module (10) is parallel with the capacitance-resistance protective circuit of diode.
4, according to claim 2 or 3 described stepless torque braking controller of electric vortex speed releaser, it is characterized in that: the current detection circuit (8) of enforcement overcurrent, overvoltage protection and the output of voltage detecting circuit (9) are connected on the input of chip for driving (7).
CN 200710020365 2007-02-12 2007-02-12 Stepless torque braking controller of electric vortex speed releaser CN101030754A (en)

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Application Number Priority Date Filing Date Title
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102120424A (en) * 2010-12-09 2011-07-13 浙江师范大学 Controller and control method of eddy-current retarder of combined braking system
CN101741308B (en) * 2008-11-04 2013-04-24 华越汽车制动技术(深圳)有限公司 Controller of current vortex retarder and control method
CN103676676A (en) * 2012-09-05 2014-03-26 洛阳市黄河软轴控制器股份有限公司 Intelligent switching circuit for eddy current retarder
CN104633096A (en) * 2014-12-03 2015-05-20 洛阳市黄河软轴控制器股份有限公司 Road roller power gear-shifting control system
CN105048909A (en) * 2015-05-21 2015-11-11 江苏大学 Eddy current retarder system with stepless adjustable field current and control method thereof
CN105083028A (en) * 2015-09-14 2015-11-25 盐城市步高汽配制造有限公司 Torque increasing braking device of self-excitation type retarder
CN105577055A (en) * 2016-03-09 2016-05-11 常州大米机电科技有限公司 Eddy current retarder electronic controller
CN107317527A (en) * 2017-08-11 2017-11-03 常州机电职业技术学院 Brshless DC motor, brshless DC motor brake control method and device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101741308B (en) * 2008-11-04 2013-04-24 华越汽车制动技术(深圳)有限公司 Controller of current vortex retarder and control method
CN102120424A (en) * 2010-12-09 2011-07-13 浙江师范大学 Controller and control method of eddy-current retarder of combined braking system
CN103676676A (en) * 2012-09-05 2014-03-26 洛阳市黄河软轴控制器股份有限公司 Intelligent switching circuit for eddy current retarder
CN104633096A (en) * 2014-12-03 2015-05-20 洛阳市黄河软轴控制器股份有限公司 Road roller power gear-shifting control system
CN105048909A (en) * 2015-05-21 2015-11-11 江苏大学 Eddy current retarder system with stepless adjustable field current and control method thereof
CN105083028A (en) * 2015-09-14 2015-11-25 盐城市步高汽配制造有限公司 Torque increasing braking device of self-excitation type retarder
CN105083028B (en) * 2015-09-14 2017-03-15 盐城市步高汽配制造有限公司 Brake unit is turned round in a kind of increasing of self-excitation retarder
CN105577055A (en) * 2016-03-09 2016-05-11 常州大米机电科技有限公司 Eddy current retarder electronic controller
CN107317527A (en) * 2017-08-11 2017-11-03 常州机电职业技术学院 Brshless DC motor, brshless DC motor brake control method and device
CN107317527B (en) * 2017-08-11 2019-05-03 常州机电职业技术学院 Brshless DC motor, brshless DC motor brake control method and device

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