CN201989628U - Electric uniform speed control device for golf cart - Google Patents
Electric uniform speed control device for golf cart Download PDFInfo
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- CN201989628U CN201989628U CN2011200477421U CN201120047742U CN201989628U CN 201989628 U CN201989628 U CN 201989628U CN 2011200477421 U CN2011200477421 U CN 2011200477421U CN 201120047742 U CN201120047742 U CN 201120047742U CN 201989628 U CN201989628 U CN 201989628U
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- 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
- Y02T10/72—Electric energy management in electromobility
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Abstract
The utility model relates to an electric uniform speed control device for a golf cart, which is suitable for ensuring that the golf cart moves with a constant speed when running on different roads. The electric uniform speed control device comprises a DC motor used for driving a wheel of the golf cart, a central controller connected with a Hall sensor to collect the rotational speed of the DC motor, a vehicle speed setting circuit connected with the central controller and used for setting the speed of the golf cart, a PWM (pulse-width modulation) pulse amplifying circuit connected with the PWM pulse signal output terminal of the central controller, and a switching circuit; the control signal input terminal of the switching circuit is connected with the pulse signal output terminal of the PWM pulse amplifying circuit; and the power supply output terminal of the switching circuit is connected with the power supply input terminal of the DC motor.
Description
Technical field
The utility model relates to the technical field of the average rate control of battery-driven car, specifically is a kind of electronic average rate control setup of golf cart.
Background technology
Electric boosted type handbarrow (as hand push battery-driven cars such as golf cart, hand push tricycles for the disabled) uses storage battery, DC machine to add controller, work in the hand steered mode of grasping direction of holding of user, be loaded with weight above and (place many balls bar, ball or other article as golf cart, the weight mouth reaches more than the 20Kg), in order to reduce user's thrust, by the speed height of governing speed knob change DC machine, so that make the battery-driven car speed of a motor vehicle consistent with user's walking speed.But this battery-driven car in use, in case the output torque speed setting of motor is constant after good, big ground (as pit, meadow etc.) very wise move speed is slack-off when meeting obstructions; When running into more smooth ground, then the speed of a motor vehicle is very fast, need quicken one's step when making the user, sometimes paces or do not stop the governing speed knob need to slow down, to guarantee walking in step with each other of the speed of a motor vehicle and user, special under down-hill situation because the action of gravity of in-vehicle mounted object, need user's tracking of need running, thereby brought inconvenience to use.
How solving the problem of above-mentioned hand push battery-driven car (as pit, meadow, descending etc.) average rate control when travelling on different road surfaces, is the technical barrier of this area.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of golf cart average rate control setup that is suitable for remaining a constant speed when different road traveling.
For solving the problems of the technologies described above, the utility model provides a kind of electronic average rate control setup of golf cart, it comprises: the DC machine that is used to drive the wheel on the described golf cart, link to each other with a Hall element with the central controller of the rotating speed of gathering described DC machine, being used to of linking to each other with described central controller set the speed of a motor vehicle initialization circuit of the speed of a motor vehicle of golf cart, the pwm pulse amplifying circuit that links to each other with the pwm pulse signal mouth of described central controller, and switch circuit, the signal input end of this switch circuit links to each other with the pulse signal output end of described pwm pulse amplifying circuit, and the power output end of switch circuit links to each other with the power input of described DC machine.
The utlity model has positive effect: the electronic average rate control setup of (1) golf cart of the present utility model, shortcoming at the acceleration of battery-driven car descending, utilize micro controller system to detect the motor speed size, employing is suitable for making the PWM driving circuit of DC machine braking discharge, by the dutycycle of micro controller system by the adjustment pwm pulse signal, make dolly be operated in electronic in turn and the braking two states under the little vehicle speed of automatic compensation, remain the speed of a motor vehicle of setting.(2) in the utility model, by the thrust on the handspike that detects golf cart, the little vehicle speed of automatic compensation is so that the speed of a motor vehicle is consistent with the walking speed that pushes away passerby all the time.The power high low signal that pressure sensor sends send Chip Microcomputer A/D conversion through after amplifying, and micro controller system sends the pwm pulse of different pulse widths according to transforming numerical, and pulse process power gain rear drive machine operation is under corresponding rotating speeds.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the utility model is described in further detail, wherein
Fig. 1 is the electronic of DC machine and brake power generating schematic diagram;
Fig. 2 is the schematic circuit diagram of the switch circuit that links to each other with DC machine among the embodiment;
Current return scheme drawing when Fig. 3 is in motoring condition for the DC machine among the embodiment;
Current return scheme drawing when Fig. 4 is in the brake power generating state for the DC machine among the embodiment;
Central controller was delivered to the mode chart of the pwm pulse signal on the grid of a VMOS switching valve VT1, the 2nd VMOS switching valve VT2 when Fig. 5 was in motoring condition for the DC machine among the embodiment;
Central controller was delivered to the mode chart of the pwm pulse signal on the grid of a VMOS switching valve VT1, the 2nd VMOS switching valve VT2 when Fig. 6 was in the brake power generating state for the DC machine among the embodiment;
Fig. 7 is the birds-eye view of the golf cart among the embodiment;
Fig. 8 is the schematic circuit diagram of the electronic average rate control setup of the golf cart among the embodiment;
Fig. 9 is the pressure sensor in the described average rate control setup among the embodiment and the schematic diagram of signal amplification circuit thereof;
Figure 10 is the flow chart of the central controller in the described average rate control setup among the embodiment.
The specific embodiment
The electronic average rate control setup of the golf cart of present embodiment comprises: DC machine is used to drive the wheel on the described golf cart; Central controller links to each other with a Hall element, to gather the rotating speed of described DC machine; Speed of a motor vehicle initialization circuit links to each other with described central controller, is used to set the speed of a motor vehicle of golf cart; The pwm pulse amplifying circuit links to each other with the pwm pulse signal mouth of described central controller; Switch circuit, the signal input end of this switch circuit links to each other with the pulse signal output end of described pwm pulse amplifying circuit, and the power output end of switch circuit links to each other with the power input of described DC machine; The speed of a motor vehicle of the golf cart that described central controller basis records and the magnitude relationship of the speed of a motor vehicle that described speed of a motor vehicle initialization circuit is set, the dutycycle of the described pwm pulse signal of control output, switch circuit drives described DC machine according to the when described speed of a motor vehicle of the duty of described pwm pulse signal and is operated in motoring condition or brake power generating state.
Under the effect of described pwm pulse signal, the power output end of switch circuit produces driving voltage U
AB, and the dutycycle of described pwm pulse signal and described driving voltage U
ABConstitute proportional relationship; As described driving voltage U
ABCounter electromotive force U greater than described DC machine
MThe time, described DC machine is operated in motoring condition; As described driving voltage U
ABCounter electromotive force U less than described DC machine
MThe time, described DC machine is operated in the brake power generating state.
Described pwm pulse amplifying circuit comprises: first, second oppositely cushions discharger IC3, IC5, IC6 with the 3rd, first, second signal input part that oppositely cushions discharger IC3, IC5 links to each other with the pwm pulse signal mouth of described central controller, second signal output part that oppositely cushions discharger IC5 links to each other with the 3rd signal input part that oppositely cushions discharger IC6, and the signal output part of the first, the 3rd reverse buffering discharger IC3, IC6 is the pulse signal output end of described pwm pulse amplifying circuit; First, second links to each other with one+5V DC source with the 3rd resistance R 1, R2 and R3 through first, second respectively with the 3rd signal output part that oppositely cushions discharger IC3, IC5, IC6.
Described switch circuit comprises: first, second VMOS switching valve VT1, VT2 and first, second fast recovery diode D1, D2; The described the first, the 3rd signal output part that oppositely cushions discharger IC3, IC6 links to each other with the grid of the second, the one VMOS switching valve VT2, VT1 respectively, the one VMOS switching valve VT1 source electrode links to each other with the positive pole of a storage battery, the drain electrode of the one VMOS switching valve VT1 links to each other with the source electrode of the 2nd VMOS switching valve VT2, and the drain electrode of the 2nd VMOS switching valve VT2 links to each other with the negative pole of described storage battery; The drain electrode of the one VMOS switching valve VT1 links to each other with negative electrode with the anode of the described first fast recovery diode D1 respectively with source electrode, and the drain electrode of the 2nd VMOS switching valve VT2 links to each other with negative electrode with the anode of the described second fast recovery diode D2 respectively with source electrode; The negative pole of described DC machine, positive pole link to each other with the negative pole of described direct supply and the drain electrode of a VMOS switching valve VT1 respectively.
As Fig. 7, the rear end of the vehicle body 1 of golf cart is provided with handspike 2, and the control dial in the speed of a motor vehicle initialization circuit is located at the end of this handspike 2.Be provided with the pressure sensor that links to each other with described central controller between vehicle body 1 and the handspike 2.Be connected with a master cock on the central controller, be used to set central controller and only control the real-time speed of a motor vehicle, or only control the real-time speed of a motor vehicle according to the output of described pressure sensor according to the speed of a motor vehicle setting signal of speed of a motor vehicle initialization circuit output.
When described central controller records when having thrust on the described handspike by this pressure sensor, increase the dutycycle of described pwm pulse signal, when the thrust on recording described handspike is zero, keep the dutycycle of current pwm pulse signal constant; Wherein, the increase amplitude of the dutycycle of pwm pulse signal is directly proportional with described thrust, and concrete parameter can draw by experiment.Also can make described dutycycle increase 5-10% at every turn.When described central controller records when having pulling force on the described handspike by this pressure sensor, reduce the dutycycle of described pwm pulse signal, when the pulling force on recording described handspike is zero, keep the dutycycle of current pwm pulse signal constant.Wherein, the increase amplitude of the dutycycle of pwm pulse signal is directly proportional with described pulling force, and concrete parameter can draw by experiment.Also can make described dutycycle reduce 5-10% at every turn.
Be in series with amperemeter/ammtr A between the drain electrode of the positive pole of described DC machine and a described VMOS switching valve VT1, the current direction signal mouth of this amperemeter/ammtr A links to each other with the electric machine operation state test side of described central controller; When amperemeter/ammtr A output positive level, described DC machine is operated in motoring condition; When amperemeter/ammtr A output negative level, described DC machine is operated in the brake power generating state; When amperemeter/ammtr A output zero level, described driving voltage U
ABEqual the counter electromotive force U of described DC machine
M
Described central controller detects the real-time speed of a motor vehicle of golf cart by Hall element, when the real-time speed of a motor vehicle is higher than the setting numerical value of described speed of a motor vehicle initialization circuit, the ratio that is higher than described setting numerical value according to the described real-time speed of a motor vehicle, (it is big more to be that the real-time speed of a motor vehicle is higher than the ratio of described setting numerical value for the dutycycle of the corresponding described pwm pulse signal that reduces to export, the corresponding described dutycycle amplitude that reduces is just big more, and concrete parameter can draw by experiment); 1-3 is after second, if when recording the real-time speed of a motor vehicle and still being higher than described setting numerical value, the ratio that the described once more real-time speed of a motor vehicle is higher than described setting numerical value reduces described dutycycle, so repeatedly, when the described real-time speed of a motor vehicle equals the setting numerical value of described speed of a motor vehicle initialization circuit, keep the dutycycle of current pwm pulse signal constant.
When the described real-time speed of a motor vehicle is lower than described setting numerical value, be lower than the ratio of described setting numerical value, the dutycycle of the described pwm pulse signal of corresponding increase output according to the described real-time speed of a motor vehicle; 1-3 is after second, if when recording the described real-time speed of a motor vehicle and still being lower than described setting numerical value, be lower than the ratio of described setting numerical value once more according to the described real-time speed of a motor vehicle, the described dutycycle of corresponding increase, so repeatedly, when the described real-time speed of a motor vehicle equals the setting numerical value of described speed of a motor vehicle initialization circuit, keep the dutycycle of current pwm pulse signal constant.
When recording DC machine by described amperemeter/ammtr A, described central controller is in the brake power generating state, and recording the described speed of a motor vehicle is lower than when setting numerical value, increase the dutycycle of described pwm pulse signal, when recording described amperemeter/ammtr A output zero level, keep the dutycycle of current pwm pulse signal constant; In second,, judge that then current vehicle is on the down ramp at 1-3 then if record when the described real-time speed of a motor vehicle is lasting to be increased; Simultaneously, calculate acceleration/accel according to the velocity increment in the unit time; When the real-time speed of a motor vehicle that records reaches the setting numerical value of described speed of a motor vehicle initialization circuit, according to the current real-time speed of a motor vehicle and described acceleration/accel, the dutycycle of the described pwm pulse signal of corresponding reduction, so that described DC machine is operated in the brake power generating state, and to make the acceleration/accel of current vehicle be zero.
Speed of a motor vehicle initialization circuit comprises: resistance R 4 and band knob-style variable resistance R5; Pressure sensor comprises: metal filament type resistance strain gage R11, R12, R13 and R14, the signal amplification circuit that links to each other with the signal output part of this pressure sensor comprises: high input impedance type amplifier IC3(model is LF356).
Described central controller is micro controller system IC1, it adopts inside to have the P87LPC768 chip of FLASH program store and 4 road A/D converters and 4 road pwm pulse generators, IC2 is integrated voltage stabilizing chip 7805, first, second and the 3rd reverse buffering discharger IC3, IC5, IC6 use OC gate circuit (model is 7406), Hall element comprises that can adopt the integrated Hall circuit IC4(of switching mode model is 6837), fast recovery diode uses FR304, and VMOS can adopt IRF540.
Among Fig. 1, it is to be operated in motoring condition (being that motor is exported positive moment of torsion) that the motor of first and third quadrant rotates and reverse, and second, four-quadrant is to be operated in dynamic brake state (be motor output negative torque).
To adopt Fig. 2 that the irreversible PWM type of drive of braking is arranged is example, Us is for being storage battery, and Ui1, Ui2 are respectively the driving voltage of VT2 and VT2, as shown in Figure 5, export two groups of oppositely directed pwm pulse signals by the pwm pulse amplifying circuit, guarantee not conducting simultaneously of VT1, VT2.
Fig. 3 is operated in the direction of current of motoring condition for DC machine M, and is shown in Figure 5 at 0 ~ t1(of pwm pulse) stage VT1 conducting, electric current flow through successively Us+, VT1, M and Us-, motor M is in motoring condition shown in loop among Fig. 31; T1 ~ t2(at pwm pulse is shown in Figure 5) stage VT1 ends, power supply is blocked, the self-induced emf of armature loop makes electric current form the loop shown in loop Fig. 32 from sustained diode 2, motor M still is in the motorized motions state, although this moment, the VT2 grid was high level Ui2, because the not conducting of clamped effect VT2 of D2.
When the dutycycle of pwm pulse diminishes (as shown in Figure 6) gradually, up to the forward average voltage U that is added on the DC machine
ABCounter electromotive force U less than DC machine
M, at this moment, the reverse direction current flow of DC machine produces braking torque.0 ~ t1 stage among Fig. 6, the VT1 conducting, DC machine is operated in the regenerative brake state, the flowing shown in loop among Fig. 43, to power source charges of electric current; The t1 of Fig. 6 ~ t2 stage, the VT2 conducting, DC machine is operated in the resistance braking state, the flowing shown in loop among Fig. 44 of electric current;
When the difference of the speed of a motor vehicle of the real-time speed of a motor vehicle and described setting during less than preset value, and when the control DC machine enters braking mode, may will cause under the situation that excessively reduces speed, can adopt the mode of operation (mode of operation of two pulse width timesharing output) of electronic and braking timesharing driven, be that described central controller is according to the real-time speed of a motor vehicle, being suitable for of the corresponding dutycycle of circulation output successively controlled the pwm pulse signal (being electronic pulse) that described DC motor is in motoring condition and the pwm pulse signal (being brake pulse) of dynamic brake state, the size of the speed of a motor vehicle of the more real-time simultaneously speed of a motor vehicle and described setting, and the described electronic pulse of corresponding adjustment output and the time length of brake pulse, still can not satisfy second when at the uniform velocity requiring at 2-3, the dutycycle of electronic pulse of corresponding again adjustment and brake pulse is (that is: if the speed of a motor vehicle is greater than the speed of a motor vehicle of described setting in real time, then reduce electronic duty of ratio respectively, increase the dutycycle of brake pulse; Otherwise, then increase electronic duty of ratio respectively, reduce the dutycycle of brake pulse), equaling the speed of a motor vehicle of described setting and the described electronic pulse of output or the time of brake pulse until the real-time speed of a motor vehicle is zero.
Fig. 7 is the birds-eye view of golf cart, wherein finding speed is to use Hall element, it comprises switching Hall components 5 and magnet 4, Hall element 5 is installed on the motor fixed main body, (particular circuit configurations is seen Fig. 8) on the singlechip interruption mouth received in the output of Hall element 5,4 magnet 4 evenly are installed in a week in the rotating shaft of car 3 on the other side, wheel revolution moving one encloses like this, to produce 4 interruption pulses, the detection of rotating speed is adopted and is interrupted method of counting, promptly after receiving interrupt signal, begin cycle count, receive that once more interrupt signal stops counting last time, start counting next time, and twice count value compared the variation that speed is determined in the back.
The foregoing description only is for the utility model example clearly is described, and is not to be qualification to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection domain of the present utility model.
Claims (4)
1. the electronic average rate control setup of a golf cart, it is characterized in that comprising: the DC machine that is used to drive the wheel on the described golf cart, link to each other with a Hall element with the central controller of the rotating speed of gathering described DC machine, being used to of linking to each other with described central controller set the speed of a motor vehicle initialization circuit of the speed of a motor vehicle of golf cart, the pwm pulse amplifying circuit that links to each other with the pwm pulse signal mouth of described central controller, and switch circuit, the signal input end of this switch circuit links to each other with the pulse signal output end of described pwm pulse amplifying circuit, and the power output end of switch circuit links to each other with the power input of described DC machine.
2. the electronic average rate control setup of a kind of golf cart according to claim 1, it is characterized in that: described pwm pulse amplifying circuit comprises: first, the second and the 3rd oppositely cushions discharger (IC3, IC5, IC6), first, second oppositely cushions discharger (IC3, IC5) signal input part links to each other with the pwm pulse signal mouth of described central controller, second signal output part that oppositely cushions discharger (IC5) links to each other first with the 3rd signal input part that oppositely cushions discharger (IC6), the 3rd oppositely cushions discharger (IC3, IC6) signal output part is the pulse signal output end of described pwm pulse amplifying circuit;
First, second links to each other with one+5V DC source with the 3rd resistance (R1, R2 and R3) through first, second respectively with the 3rd signal output part that oppositely cushions discharger (IC3, IC5, IC6).
3. the electronic average rate control setup of a kind of golf cart according to claim 2, it is characterized in that: described switch circuit comprises: first, second VMOS switching valve (VT1, VT2) and first, second fast recovery diode (D1, D2); The described the first, the 3rd signal output part that oppositely cushions discharger (IC3, IC6) links to each other with the grid of the second, the one VMOS switching valve (VT2, VT1) respectively, the one VMOS switching valve (VT1) source electrode links to each other with the positive pole of a storage battery, the drain electrode of the one VMOS switching valve (VT1) links to each other with the source electrode of the 2nd VMOS switching valve (VT2), and the drain electrode of the 2nd VMOS switching valve (VT2) links to each other with the negative pole of described storage battery;
The drain electrode of the one VMOS switching valve (VT1) links to each other with negative electrode with the anode of described first fast recovery diode (D1) respectively with source electrode, and the drain electrode of the 2nd VMOS switching valve (VT2) links to each other with negative electrode with the anode of described second fast recovery diode (D2) respectively with source electrode;
The negative pole of described DC machine, positive pole link to each other with the negative pole of described direct supply and the drain electrode of a VMOS switching valve (VT1) respectively.
4. the electronic average rate control setup of a kind of golf cart according to claim 1, it is characterized in that: the body rear end of golf cart is provided with handspike, is provided with the pressure sensor that links to each other with described central controller between vehicle body and the handspike.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200477421U CN201989628U (en) | 2011-02-25 | 2011-02-25 | Electric uniform speed control device for golf cart |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200477421U CN201989628U (en) | 2011-02-25 | 2011-02-25 | Electric uniform speed control device for golf cart |
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| Publication Number | Publication Date |
|---|---|
| CN201989628U true CN201989628U (en) | 2011-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200477421U Expired - Fee Related CN201989628U (en) | 2011-02-25 | 2011-02-25 | Electric uniform speed control device for golf cart |
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| CN (1) | CN201989628U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802675A (en) * | 2016-12-21 | 2017-06-06 | 歌尔科技有限公司 | A kind of speed method for self-calibrating and device and a kind of smart machine |
| CN109131698A (en) * | 2018-09-30 | 2019-01-04 | 无锡绿科源电子科技有限公司 | Brake method, device and electronic equipment based on linear Hall |
-
2011
- 2011-02-25 CN CN2011200477421U patent/CN201989628U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802675A (en) * | 2016-12-21 | 2017-06-06 | 歌尔科技有限公司 | A kind of speed method for self-calibrating and device and a kind of smart machine |
| CN106802675B (en) * | 2016-12-21 | 2019-12-27 | 歌尔科技有限公司 | Vehicle speed self-calibration method and device and intelligent equipment |
| CN109131698A (en) * | 2018-09-30 | 2019-01-04 | 无锡绿科源电子科技有限公司 | Brake method, device and electronic equipment based on linear Hall |
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Granted publication date: 20110928 Termination date: 20150225 |
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