CN201616751U - Device conducting origin positioning by stalling of DC motor - Google Patents
Device conducting origin positioning by stalling of DC motor Download PDFInfo
- Publication number
- CN201616751U CN201616751U CN2009202016526U CN200920201652U CN201616751U CN 201616751 U CN201616751 U CN 201616751U CN 2009202016526 U CN2009202016526 U CN 2009202016526U CN 200920201652 U CN200920201652 U CN 200920201652U CN 201616751 U CN201616751 U CN 201616751U
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- direct current
- pulse
- current machine
- motor
- chip microcomputer
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 33
- 230000005611 electricity Effects 0.000 claims description 5
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000036278 prepulse Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model relates to a device conducting origin positioning by stalling of a DC motor. The device comprises a power source, the DC motor, a motor controller, a filter circuit, a voltage comparator and a singlechip. When the singlechip detects the voltage jump of the voltage comparator, the motor controller ensures that the DC motor is electrified after power loss in a preset time, the overcurrent time of the DC motor is converted into a string of pulses; the singlechip is provided with a counter used for counting the pulses; and the singlechip stops the DC motor through the motor controller when the accumulated number of pulses counted by the counter is larger than the set number of pulses stored in the singlechip. The device provided by the utility model can not only conduct the origin positioning by utilizing the stalling of the DC motor, but also reduce the stalling overcurrent time of the DC motor, so as to eliminate the adverse effect caused by the over-long overcurrent time of the stalling of the DC motor, and further protect the motor.
Description
Technical field
The utility model relates to a kind of direct current machine automatic control equipment, relates in particular to a kind of device that utilizes the direct current machine stall to carry out original point position.
Background technology
Under powering state, the rotor of motor does not change, and at this moment motor is in the stall state.The electric current of motor surpasses the manyfold of normal value during stall, and over current of motor can make motor temperature rising, decreased performance, can damage motor when serious, so in the ordinary course of things, motor is not allow to enter the stall state.
In some application scenario of direct current machine, can utilize the stall state of motor to position, as: when motor driving machinery telecontrol equipment is walked fixed dam, because stall takes place this moment in motor actuator continuation operation again.Utilize the size and the duration of overcurrent when surpassing normal the operation when detecting the stall state to judge whether travelling mechanism outreaches, and whether arrives the operation initial point of mechanism that is:.Because motor also has the overcurrent times over normal value when startup, the overcurrent when overcurrent the when length that present general employing detects the overcurrent time is distinguished startup and stall, the time that promptly makes the generation of stall overcurrent artificially is greater than the maximum time that starts overcurrent.It is also relatively more difficult to measure startup overcurrent time value exactly, and the estimated value in the practice is much larger than exact value.In addition, in order to improve the stability of overcurrent time measurement, resistor ﹠ capacitor filter needs bigger time constant, and these all can increase the time value of the overcurrent of measurement, finally can increase the time that the stall overcurrent produces.Therefore, adopt said method to utilize stall to locate continually, motor is in the bad operational environment, reduced motor properties, when serious even can damage motor.
Summary of the invention
Main purpose of the present utility model is, proposes a kind ofly to help protecting the direct current machine stall that utilizes of direct current machine to carry out the device of original point position.
To achieve these goals, the technical solution adopted in the utility model is: a kind of device that utilizes the direct current machine stall to carry out original point position, comprise power supply, direct current machine, be used to control the electric machine controller of direct current machine, filter circuit, voltage comparator and single-chip microcomputer, electric machine controller is connected in series with direct current machine, filter circuit connects electric machine controller and voltage comparator, single-chip microcomputer connects voltage comparator and electric machine controller, the output voltage of filter circuit when the reference voltage of voltage comparator is slightly less than direct current machine startup and stall, after voltage that single-chip microcomputer detects voltage comparator makes the direct current machine dead electricity scheduled time by electric machine controller during along saltus step again, the direct current machine overcurrent time is converted to pulse train, single-chip microcomputer has the counter that this pulse is counted, when the accumulative total umber of pulse of counter during greater than the setting umber of pulse of single-chip microcomputer storage, single-chip microcomputer cuts out direct current machine by electric machine controller, the umber of pulse that this is set that umber of pulse starts greater than direct current machine and produces at the output of voltage comparator during normal operation.
The device that the utility model provides can utilize the stall of direct current machine to carry out the stall overcurrent time that original point position can reduce direct current machine again, and the adverse effect that the overcurrent overlong time is brought when having eliminated the direct current machine stall has been protected motor.
Description of drawings
Fig. 1 is the utility model manipulated or operated apparatus.
Below in conjunction with accompanying drawing the utility model is described in detail.
Embodiment
Referring to Fig. 1, power supply, direct current machine 1, electric machine controller 2 and the resistance 6 work loops that connect and compose direct current machine in sequential series.Forming overcurrent voltage-pulse conversion circuit by RC filter circuit, voltage comparator 4, single-chip microcomputer 5 and electric machine controller 2 inserts between direct current machine 1 and resistance 6.The filter circuit that is made of RC filter and amplifier 3 inserts between electric machine controller 2 and resistance 6, and the inverting input of voltage comparator 4 and output are connected the output and the single-chip microcomputer 5 of amplifier 3 respectively, and single-chip microcomputer 5 connects electric machine controllers 2.The unlatching of Single-chip Controlling motor and shutoff.Single-chip microcomputer 5 has counter, and counter is used for the pulse signal of voltage comparator 4 outputs is counted.Store the setting umber of pulse in the single-chip microcomputer 5, when the each step-by-step counting of counter, single-chip microcomputer 5 compares the umber of pulse of counter with the setting umber of pulse, if the accumulative total umber of pulse is greater than setting umber of pulse, then single-chip microcomputer 5 sends instruction for electric machine controller 2, and electric machine controller 2 after receiving instruction cuts off the power supply motor 1.
The RC filter that the voltage that the electric current of direct current machine 1 produces on resistance 6 is formed by RC is delivered to the in-phase input end of amplifier 3, amplifies the back through amplifier 3 and compares with reference voltage in voltage comparator 4.The output voltage of amplifier 3 when the reference voltage of voltage comparator 4 is set to be slightly less than direct current machine startup and stall by circuit.When direct current machine 1 owing to start or stall when producing overcurrent, the input voltage of voltage comparator 4 is greater than reference voltage, the output voltage generation saltus step of voltage amplifier 4, the voltage that single-chip microcomputer 5 detects voltage comparator 4 makes direct current machine 1 dead electricity by electric machine controller 2 after saltus step, behind the single-chip microcomputer 5 control direct current machine dead electricity certain hours by electric machine controller 2 make direct current machine 1 again electric, this process is overcurrent voltage-pulses switch.Circuit is converted to pulse train to the over current of motor duration in this way.The counter of single-chip microcomputer 5 is counted this pulse, and in counting with the umber of pulse of counter with set umber of pulse and compare.The filter time constant that resistance capacitance RC forms has certain pulse width T in the time of will guaranteeing over current of motor
1, the turn-off time of Single-chip Controlling motor is T
2, duty of ratio is T
1/ (T
1+ T
2)=90%.Pulse frequency F=1/ (the T that produces
1+ T
2) will be controlled in the operational factor scope of direct current machine.When frequency was too high, electric motor starting was unable; During underfrequency, the direct current machine overcurrent duration becomes big, is unfavorable for electric motor protecting.Setting umber of pulse in the single-chip microcomputer 5 greater than direct current machine 1 start and during normal operation because the umber of pulse that overcurrent produced.Before starting direct current machine 1 with counter O reset, before running to the stall position, direct current machine 1 artificially direct current machine is cut off the power supply, this moment, the counter of single-chip microcomputer 5 obtained a count value, this value be that direct current machine starts and during normal operation because the umber of pulse that overcurrent produces at the output of voltage comparator.Present embodiment is set umber of pulse and is set to 110% of this value, and this setting umber of pulse can also be set to other value.
Describe the concrete course of work of the utility model device in detail below in conjunction with accompanying drawing.At first before starting direct current machine 1 with the counter O reset of single-chip microcomputer 5.Start direct current machine 1 then, direct current machine 1 is because startup has produced overcurrent, the voltage that the output signal generation saltus step of voltage amplifier 4, single-chip microcomputer 5 detect voltage comparator 4 makes direct current machine 1 dead electricity by electric machine controller 2 after saltus step, single-chip microcomputer 5 control direct current machines turn-off T
2It is electric by electric machine controller 2 direct current machine 1 to be got after time, and overcurrent voltage-pulse conversion circuit is converted to pulse train to the over current of motor time in this way.The counter of single-chip microcomputer 5 is counted this pulse, and in counting with the umber of pulse of counter with set umber of pulse and compare.Normal operation after direct current machine 1 startup is finished, can not produce overcurrent this moment usually.Stall takes place in direct current machine 1 when direct current machine runs to initial point, overcurrent voltage-pulse conversion circuit is converted to pulse train to the motor rotation blockage overcurrent time by above-mentioned the same manner, continues this pulse is counted on the umber of pulse basis of the counter of single-chip microcomputer 5 before the direct current machine stall.At last when the accumulative total umber of pulse of counter when setting pulse, single-chip microcomputer 5 sends instruction for electric machine controller 2, electric machine controller 2 after receiving instruction cuts out motor 1.This shows, last accumulative total umber of pulse is that stall prepulse number and stall take place to the umber of pulse sum that produces between the direct current machine turnoff time, the numeric ratio of the two promptly can be considered the ratio of moving overcurrent time of DC motor start and stall overcurrent time, the latter determines by the setting umber of pulse that single-chip microcomputer 5 is set, and is set to little more a lot than the former usually.In the present embodiment, the latter only is the former 10%, and promptly the stall overcurrent time only just can determine that for starting 10% o'clock overcurrent time device of the present utility model direct current machine has arrived original point position.
The counter of the utility model device single-chip microcomputer when direct current machine starts and normally move is counted, when direct current machine generation stall, counter continues counting, direct current machine can exceed the setting umber of pulse in the accumulative total umber of pulse of the short time of stall overcurrent inside counting device like this, also is that direct current machine electric machine controller in the short time that the stall overcurrent takes place makes the direct current machine outage.Like this, device of the present utility model can utilize the stall state of direct current machine to carry out original point position, can reduce the stall overcurrent time of direct current machine again, has protected direct current machine.
The utility model converts the overcurrent duration that starts and stall produces to pulse number, utilizes the counting of umber of pulse, has distinguished the different situations of startup and stall well.Stall only can be located initial point with several pulses during the location, has solved because adopt the stall method to locate the harmful effect that causes motor.Owing to when flow valuve is converted to umber of pulse excessively, has carried out certain restriction and carried out pulse-width modulation, further protected motor again to crossing flow valuve.It is sensitive, accurate that the utility model device is located in practice, and the operating state of motor is very good.
Claims (4)
1. device that utilizes the direct current machine stall to carry out original point position, comprise power supply, direct current machine and the electric machine controller that is used to control direct current machine, described electric machine controller is connected in series with direct current machine, it is characterized in that, described device also comprises filter circuit, voltage comparator and single-chip microcomputer, filter circuit connects electric machine controller and voltage comparator, single-chip microcomputer connects voltage comparator and electric machine controller, the output voltage of described filter circuit when the reference voltage of voltage comparator is slightly less than direct current machine startup and stall, after voltage that single-chip microcomputer detects voltage comparator makes the direct current machine dead electricity scheduled time by electric machine controller during along saltus step again, the direct current machine overcurrent time is converted to pulse train, single-chip microcomputer has the counter that this pulse is counted, when the accumulative total umber of pulse of counter during greater than the setting umber of pulse of single-chip microcomputer storage, single-chip microcomputer cuts out direct current machine by electric machine controller, the umber of pulse that described setting umber of pulse starts greater than direct current machine and produces at the output of voltage comparator during normal operation.
2. device according to claim 1 is characterized in that, described setting umber of pulse be direct current machine start and the umber of pulse that produces at the output of voltage comparator during normal operation 110%.
3. device according to claim 2 is characterized in that, described filter circuit comprises the RC filter of amplifier and the in-phase input end that is connected described amplifier.
4. device according to claim 3 is characterized in that, described RC filter time constant guarantees that the width of described pulse when the direct current machine overcurrent is T
1, the described scheduled time is T
2, duty of ratio is T
1/ (T
1+ T
2)=90%, pulse frequency is in the operational factor scope of direct current machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202016526U CN201616751U (en) | 2009-12-10 | 2009-12-10 | Device conducting origin positioning by stalling of DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202016526U CN201616751U (en) | 2009-12-10 | 2009-12-10 | Device conducting origin positioning by stalling of DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201616751U true CN201616751U (en) | 2010-10-27 |
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ID=43003113
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202016526U Expired - Fee Related CN201616751U (en) | 2009-12-10 | 2009-12-10 | Device conducting origin positioning by stalling of DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201616751U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107517A (en) * | 2013-03-01 | 2013-05-15 | 深圳市怡化电脑有限公司 | Overload protection method and overload protection system for direct-current (DC) motor |
| CN103166209A (en) * | 2011-12-19 | 2013-06-19 | 苏州能健电气有限公司 | Device and method of direct current variable pitch motor protection |
| CN110920497A (en) * | 2019-12-09 | 2020-03-27 | 东风汽车有限公司 | Automobile seat leg drag adjusting method and electronic equipment |
-
2009
- 2009-12-10 CN CN2009202016526U patent/CN201616751U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166209A (en) * | 2011-12-19 | 2013-06-19 | 苏州能健电气有限公司 | Device and method of direct current variable pitch motor protection |
| CN103107517A (en) * | 2013-03-01 | 2013-05-15 | 深圳市怡化电脑有限公司 | Overload protection method and overload protection system for direct-current (DC) motor |
| CN103107517B (en) * | 2013-03-01 | 2015-05-20 | 深圳怡化电脑股份有限公司 | Overload protection method for direct-current (DC) motor |
| CN110920497A (en) * | 2019-12-09 | 2020-03-27 | 东风汽车有限公司 | Automobile seat leg drag adjusting method and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101027 Termination date: 20121210 |