CN104149637A - Digital control based electromagnetic braking method - Google Patents
Digital control based electromagnetic braking method Download PDFInfo
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- CN104149637A CN104149637A CN201410377162.7A CN201410377162A CN104149637A CN 104149637 A CN104149637 A CN 104149637A CN 201410377162 A CN201410377162 A CN 201410377162A CN 104149637 A CN104149637 A CN 104149637A
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Abstract
The invention provides a digital control based electromagnetic braking method. The electromagnetic braking method includes the following steps: converting braking force of a driver into proportional electrical signals through a sensor connected with a brake pedal; receiving the electrical signals through a controller, and after receiving the electrical signals, finding the corresponding control signals through a link, and outputting the electrical signals, wherein a data table including electrical signal values and the corresponding control signals is stored in the controller; controlling to output power current with corresponding amplitudes to a first electromagnetic winding through a first electric power conversion circuit according to the control signals of the controller; controlling to output power current with corresponding amplitudes to a second electromagnetic winding through a second electric power conversion circuit according to the control signals of the controller.
Description
Technical field
The present invention relates to vehicle electric field, refer to especially a kind of brake system.
Background technology
In the brake system of automobile, brake facing is the breaking piece of most critical, and the quality of all braking effects is all that brake facing plays a decisive role, so the brake facing of agreeing is the patron saint of people and automobile.
Brake facing is generally made up of steel plate, bonding thermal insulation layer and friction shoe, and steel plate will come through application antirust, and coating process is ensured the quality of products with the temperature traverse that SMT-4 furnace temperature tracker detects coating process.Wherein thermal insulation layer is made up of adiabatical material, and object is heat insulation.Friction shoe is made up of friction material, adhesives, is compressed on brake disc or brake drum and produces and rub, thereby reach the object that car retardation brakes when brake.Due to rubbing effect, friction shoe can be worn gradually, and the brake facing that cost is lower in general weares and teares sooner.
Existing brake facing mainly divides following a few class: asbestos brake lining, semi-metallic brake pad, micro-metal brake pad, NAO formula brake facing, ceramic brake, NAO ceramic brake.The principle of work of existing brake facing is mainly carried out self-friction, utilizes the friction of brake facing and brake disc (drum), and the kinetic energy that vehicle is advanced converts the heat energy after friction to, and car is stopped.
The method of traditional friction brake, causes the wearing and tearing of corresponding component, reduction of service life.
Summary of the invention
The present invention proposes a kind of based on numerically controlled electromagnetic brake method, solved friction brake in prior art and cause the problem of component wear.
Technical scheme of the present invention is achieved in that
A kind of based on numerically controlled electromagnetic brake method, based on the first electromagnetism winding and the second electromagnetism winding, described the first electromagnetism winding and tire are coaxial fixing and be arranged on wheel hub inner side, and the quantity of the first electromagnetism winding is at least 8, is evenly distributed on the circumference of wheel hub inner side; Described the second electromagnetism winding is fixed on by braking bracket on the circumference of the first electromagnetism winding travel path, and the first electromagnetism winding, with tire rotation, forms rotor, and the second electromagnetism winding is fixed on braking bracket, as stator; Comprise the following steps:
Step (a), is converted into proportional electric signal by the sensor being connected to brake pedal by navigating mate braking strength;
Step (b), receives described electric signal by controller, stores data sheet in controller, this data sheet comprises electric signal numerical value and the control signal corresponding with it, when receiving after described electric signal, find corresponding control signal by link, and by its output;
Step (c), by the first power transformation circuit, the battery tension of its input end access is carried out to power converter, its mouth is connected to the first electromagnetism winding, arrives described the first electromagnetism winding according to the electric current of the control signal control output respective magnitudes of described controller;
The step of carrying out power converter by described the first power transformation circuit, specifically comprises:
First, carry out the conversion of voltage class by voltage transformer, described voltage transformer comprises former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to described storage battery, and secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends;
Then, by the first switching valve, input voltage is carried out to copped wave processing, the source electrode of the first switching valve is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
Next, by the first switch driver, the conducting dutycycle of described the first switching valve is modulated, the first switch driver comprises the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, control end receives the control signal of described controller output, the emitter of the first transistor and transistor seconds links together as mouth, the collecting electrode of the first transistor is connected to storage battery, the collecting electrode of transistor seconds is connected to former limit earth potential,
Step (d), by the second power transformation circuit, the battery tension of its input end access is carried out to power converter, its mouth is connected to the second electromagnetism winding, arrives described the first electromagnetism winding according to the electric current of the control signal control output respective magnitudes of described controller;
The step of carrying out power converter by described the second power transformation circuit, specifically comprises:
First, by the second inducer, storage battery input voltage is carried out to filtering;
Then, by switch circuit to filtering after voltage process, switch circuit comprises second switch pipe and the 3rd switching valve, the source electrode of second switch pipe and the 3rd switching valve links together and is connected to the other end of the second inducer, the drain electrode of second switch pipe is connected to secondary earth potential, the drain electrode of the 3rd switching valve is connected to the second cond, and the other end of the second cond is connected to secondary earth potential; The control end of above-mentioned second switch pipe and the 3rd switching valve is connected to second switch actuator, it is the UC3714 of Texas Instruments chip, clock signal based on control end input produces the switching drive signal of two-way complementation, one tunnel is coupled to described second switch tube grid, another road is coupled to described the 3rd switching valve grid, and its control end is connected to described dsp processor.
The invention has the beneficial effects as follows:
By being arranged on the generator system on axle drive shaft, realize magnetic resistance braking, avoid the component wear of traditional brake facing.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of diagram of circuit based on numerically controlled electromagnetic brake method of the present invention;
Fig. 2 is a kind of winding construction schematic diagram based on numerically controlled electromagnetic brake method of the present invention;
Fig. 3 is a kind of functional block diagram based on numerically controlled electromagnetic brake method of the present invention;
Fig. 4 is the circuit diagram of the first power transformation circuit;
Fig. 5 is the circuit diagram of the second power transformation circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 2, one of the present invention is based on numerically controlled electromagnetic brake method, comprise: the first electromagnetism winding 30 and the second electromagnetism winding 70, described the first electromagnetism winding and tire are coaxial fixing and be arranged on wheel hub inner side, the quantity of the first electromagnetism winding is at least 8, is evenly distributed on the circumference of wheel hub inner side; Described the second electromagnetism winding is fixed on by braking bracket on the circumference of the first electromagnetism winding travel path, and the first electromagnetism winding, with tire rotation, forms rotor, and the second electromagnetism winding is fixed on braking bracket, as stator.
As shown in Figure 1, one of the present invention, based on numerically controlled electromagnetic brake method, comprises the following steps:
Step (a), is converted into proportional electric signal by the sensor being connected to brake pedal by navigating mate braking strength;
Step (b), receives described electric signal by controller, stores data sheet in controller, this data sheet comprises electric signal numerical value and the control signal corresponding with it, when receiving after described electric signal, find corresponding control signal by link, and by its output;
Step (c), by the first power transformation circuit, the battery tension of its input end access is carried out to power converter, its mouth is connected to the first electromagnetism winding, arrives described the first electromagnetism winding according to the electric current of the control signal control output respective magnitudes of described controller;
Step (d), by the second power transformation circuit, the battery tension of its input end access is carried out to power converter, its mouth is connected to the second electromagnetism winding, arrives described the first electromagnetism winding according to the electric current of the control signal control output respective magnitudes of described controller.
As shown in Figure 3, of the present invention based on numerically controlled electromagnetic brake method, its principle is: the brake pedal sensor 40 being connected with brake pedal, export proportional electric signal according to navigating mate braking strength; Controller 50, receives the electric signal that described brake pedal sensor is exported, and exports corresponding control signal by the data sheet prestoring; The first power transformation circuit 20, its input end is connected to storage battery 10, and its mouth is connected to the first electromagnetism winding, arrives described the first electromagnetism winding 30 according to the electric current of the control signal control output respective magnitudes of described controller 50; The second power transformation circuit 60, its input end is connected to storage battery 10, and its mouth is connected to the second electromagnetism winding 70, arrives described the second electromagnetism winding 70 according to the electric current of the control signal control output respective magnitudes of described controller.
Described the first electromagnetism winding 30 is arranged in vehicle drive shaft, forms power generating system with the second electromagnetism winding 70, and the first electromagnetism winding is rotor-end, and the second electromagnetism winding is stator terminal.Navigating mate operates brake pedal, the flow through electric current of the first electromagnetism winding and the second electromagnetism winding of controller control, and then to control side magnetic resistance between the first electromagnetism winding and the second electromagnetism winding be braking force, realizes braking effect.Between the first electromagnetism winding and the second electromagnetism winding, be air gap, there is no contact site, therefore do not produce any wearing and tearing, avoided the frictional loss of traditional brake modes.
As shown in Figure 4, described the first power transformation circuit 20 comprises: voltage transformer 11, comprise former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to storage battery as input end, and secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends; The first switching valve 12, its source electrode is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver 13; The first switch driver 13, comprise the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, the emitter of the first transistor and transistor seconds links together as mouth, and the collecting electrode of the first transistor is connected to power supply 1, and the collecting electrode of transistor seconds is connected to former limit earth potential; The first diode 14, its anodic bonding is to voltage transformer secondary winding first end, and its negative electrode is connected to the first inducer 15; The common port of the first inducer 15 and the first cond 16 is as mouth, and the other end of the first cond 16 is connected to secondary earth potential.
The step of carrying out power converter by described the first power transformation circuit, specifically comprises:
First, carry out the conversion of voltage class by voltage transformer, described voltage transformer comprises former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to described storage battery, and secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends;
Then, by the first switching valve, input voltage is carried out to copped wave processing, the source electrode of the first switching valve is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
Next, by the first switch driver, the conducting dutycycle of described the first switching valve is modulated, the first switch driver comprises the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, control end receives the control signal of described controller output, the emitter of the first transistor and transistor seconds links together as mouth, the collecting electrode of the first transistor is connected to storage battery, the collecting electrode of transistor seconds is connected to former limit earth potential,
As shown in Figure 5, described the second power transformation circuit 60 comprises: the second inducer 21, and its one end is connected to described power supply 1; Second switch pipe 22 and the 3rd switching valve 23, the source electrode of second switch pipe 22 and the 3rd switching valve 23 links together and is connected to the other end of the second inducer 21, the drain electrode of second switch pipe 22 is connected to secondary earth potential, the other end that the drain electrode of the 3rd switching valve 23 is connected to mouth and the second cond 25, the second conies 25 is connected to secondary earth potential; Second switch actuator 24, it is the UC3714 of Texas Instruments chip, clock signal based on control end input produces the switching drive signal of two-way complementation, and a road is coupled to described second switch pipe 22 grids, and another road is coupled to described the 3rd switching valve 23 grids.
The step of carrying out power converter by described the second power transformation circuit, specifically comprises:
First, by the second inducer, storage battery input voltage is carried out to filtering;
Then, by switch circuit to filtering after voltage process, switch circuit comprises second switch pipe and the 3rd switching valve, the source electrode of second switch pipe and the 3rd switching valve links together and is connected to the other end of the second inducer, the drain electrode of second switch pipe is connected to secondary earth potential, the drain electrode of the 3rd switching valve is connected to the second cond, and the other end of the second cond is connected to secondary earth potential; The control end of above-mentioned second switch pipe and the 3rd switching valve is connected to second switch actuator, it is the UC3714 of Texas Instruments chip, clock signal based on control end input produces the switching drive signal of two-way complementation, one tunnel is coupled to described second switch tube grid, another road is coupled to described the 3rd switching valve grid, and its control end is connected to described dsp processor.
Described controller 50 outputs a control signal to the control end of the first switch driver 13 and second switch actuator 24, the turn-on and turn-off of master cock pipe, and then control the electric current that outputs to electromagnetism winding.
Preferably, described controller is dsp processor.
Preferably, described controller is TMS320F2812DSP treater.
TMS320F2812DSP, is 32 fixed DSPs, and the AD data acquisition that it has EVA, EVB task manager and supporting 12 16 passages, has abundant Peripheral Interface, as CAN, SCI etc.The ADC module of TMS320F2812 is 12 bit resolutions, has the A and D converter of pipeline organization, the built-in dual-sampling hold circuit of TMS320F2812, and while keeping data acquisition, window has independently pre-calibration to control.And permission system is to same Channel-shifted repeatedly, allow user to carry out over-sampling algorithm, this more traditional single transformation result has increased more solution, is conducive to improve the precision of sampling.There are multiple trigger sources can start ADC conversion.Fast speed transfer time, ADC clock can be configured to 25MHz, and the highest sampling bandwidth is 12.5MSPS.While building data acquisition system with TMS320F2812, needn't external ADC, avoid complicated hardware design.
The present invention, by being arranged on the generator system on axle drive shaft, realizes magnetic resistance braking, has avoided the component wear of traditional brake facing.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. one kind based on numerically controlled electromagnetic brake method, based on the first electromagnetism winding and the second electromagnetism winding, described the first electromagnetism winding and tire are coaxial fixing and be arranged on wheel hub inner side, and the quantity of the first electromagnetism winding is at least 8, is evenly distributed on the circumference of wheel hub inner side; Described the second electromagnetism winding is fixed on by braking bracket on the circumference of the first electromagnetism winding travel path, and the first electromagnetism winding, with tire rotation, forms rotor, and the second electromagnetism winding is fixed on braking bracket, as stator; It is characterized in that, comprise the following steps:
Step (a), is converted into proportional electric signal by the sensor being connected to brake pedal by navigating mate braking strength;
Step (b), receives described electric signal by controller, stores data sheet in controller, this data sheet comprises electric signal numerical value and the control signal corresponding with it, when receiving after described electric signal, find corresponding control signal by link, and by its output;
Step (c), by the first power transformation circuit, the battery tension of its input end access is carried out to power converter, its mouth is connected to the first electromagnetism winding, arrives described the first electromagnetism winding according to the electric current of the control signal control output respective magnitudes of described controller;
The step of carrying out power converter by described the first power transformation circuit, specifically comprises:
First, carry out the conversion of voltage class by voltage transformer, described voltage transformer comprises former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to described storage battery, and secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends;
Then, by the first switching valve, input voltage is carried out to copped wave processing, the source electrode of the first switching valve is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
Next, by the first switch driver, the conducting dutycycle of described the first switching valve is modulated, the first switch driver comprises the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, control end receives the control signal of described controller output, the emitter of the first transistor and transistor seconds links together as mouth, the collecting electrode of the first transistor is connected to storage battery, the collecting electrode of transistor seconds is connected to former limit earth potential,
Step (d), by the second power transformation circuit, the battery tension of its input end access is carried out to power converter, its mouth is connected to the second electromagnetism winding, arrives described the second electromagnetism winding according to the electric current of the control signal control output respective magnitudes of described controller;
The step of carrying out power converter by described the second power transformation circuit, specifically comprises:
First, by the second inducer, storage battery input voltage is carried out to filtering;
Then, by switch circuit to filtering after voltage process, switch circuit comprises second switch pipe and the 3rd switching valve, the source electrode of second switch pipe and the 3rd switching valve links together and is connected to the other end of the second inducer, the drain electrode of second switch pipe is connected to secondary earth potential, the drain electrode of the 3rd switching valve is connected to the second cond, and the other end of the second cond is connected to secondary earth potential; The control end of above-mentioned second switch pipe and the 3rd switching valve is connected to second switch actuator, it is the UC3714 of Texas Instruments chip, clock signal based on control end input produces the switching drive signal of two-way complementation, one tunnel is coupled to described second switch tube grid, another road is coupled to described the 3rd switching valve grid, and its control end is connected to described dsp processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410377162.7A CN104149637A (en) | 2014-08-01 | 2014-08-01 | Digital control based electromagnetic braking method |
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| CN201410377162.7A CN104149637A (en) | 2014-08-01 | 2014-08-01 | Digital control based electromagnetic braking method |
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| CN104149637A true CN104149637A (en) | 2014-11-19 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104175886A (en) * | 2014-08-13 | 2014-12-03 | 青岛盛嘉信息科技有限公司 | Braking method based on digital control |
| CN104192011A (en) * | 2014-08-13 | 2014-12-10 | 青岛盛嘉信息科技有限公司 | Electromagnetic brake system |
| CN104192006A (en) * | 2014-08-13 | 2014-12-10 | 青岛盛嘉信息科技有限公司 | Electromagnetic braking method |
| CN104192008A (en) * | 2014-08-13 | 2014-12-10 | 青岛盛嘉信息科技有限公司 | Brake pad based on digital control |
| CN104192005A (en) * | 2014-08-13 | 2014-12-10 | 青岛盛嘉信息科技有限公司 | Brake device based on digital control |
| CN104192007A (en) * | 2014-08-13 | 2014-12-10 | 青岛盛嘉信息科技有限公司 | Brake method based on digital control |
| CN104192004A (en) * | 2014-08-13 | 2014-12-10 | 青岛盛嘉信息科技有限公司 | Electromagnetic brake system based on digital control |
| CN107627856A (en) * | 2017-10-25 | 2018-01-26 | 中石化中原石油工程有限公司西南钻井分公司 | brake control circuit and brake system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104175886A (en) * | 2014-08-13 | 2014-12-03 | 青岛盛嘉信息科技有限公司 | Braking method based on digital control |
| CN104192011A (en) * | 2014-08-13 | 2014-12-10 | 青岛盛嘉信息科技有限公司 | Electromagnetic brake system |
| CN104192006A (en) * | 2014-08-13 | 2014-12-10 | 青岛盛嘉信息科技有限公司 | Electromagnetic braking method |
| CN104192008A (en) * | 2014-08-13 | 2014-12-10 | 青岛盛嘉信息科技有限公司 | Brake pad based on digital control |
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| CN104192004A (en) * | 2014-08-13 | 2014-12-10 | 青岛盛嘉信息科技有限公司 | Electromagnetic brake system based on digital control |
| CN107627856A (en) * | 2017-10-25 | 2018-01-26 | 中石化中原石油工程有限公司西南钻井分公司 | brake control circuit and brake system |
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