CN110146320A - A kind of laser scanning galvanometer motor torque constant measuring method - Google Patents
A kind of laser scanning galvanometer motor torque constant measuring method Download PDFInfo
- Publication number
- CN110146320A CN110146320A CN201910467156.3A CN201910467156A CN110146320A CN 110146320 A CN110146320 A CN 110146320A CN 201910467156 A CN201910467156 A CN 201910467156A CN 110146320 A CN110146320 A CN 110146320A
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- CN
- China
- Prior art keywords
- galvanometer motor
- reflecting optics
- filament
- torque constant
- counterweight
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
Abstract
The present invention provides a kind of laser scanning galvanometer motor torque constant measuring method, includes the steps of determining that required component, and connect reflecting optics on the armature spindle of galvanometer motor；It is powered after galvanometer motor is connect with drive control device, then filament is wrapped on reflecting optics, and filament both ends are drawn respectively the other way around around a pulley；The equal counterweight of sprung mass at filament both ends adjusts pulley position to change the direction of power, and adjustment filament makes it then calculate the resultant couple τ being applied on armature spindle so that the arm of force is the half of reflecting optics width perpendicular to reflecting optics surface；It is connected using current sampling resistor with stator coil in current feedback circuit in drive control device, and using the feedback voltage V of oscilloscope measurement current sampling resistor, then calculates coil current i；According to τ and i calculating torque constant km；Change counterbalance mass repeatedly to be tested, obtain multiple torque constants, the average value of acquirement is the torque constant of galvanometer motor.
Description
Technical field
The present invention relates to the performance test methods of laser scanning galvanometer, and in particular to a kind of laser scanning galvanometer motor torque
Constant measuring method.
Background technique
Galvanometer motor is the mechanical operating parts in laser scanning galvanometer, is the direct object of galvanometer control.Mainstream at present
Moving-magnetic type galvanometer motor it is compact-sized small in size, rotor uses permanent magnet, and stator is symmetrical using a pair of of coil, in structure
It is different from traditional rotating electric machine, and can only reciprocally swinging in a certain range.
The characterisitic parameter of galvanometer motor determines the optimum efficiency of its control, and wherein torque constant is a critical property
Energy parameter, characterizes the relationship between stator of vibration-mirror motor coil current and rotor output torque.Due to galvanometer motor and general rotation
The architectural difference of rotating motor is big, small in size, and the torque constant test method of traditional rotating electric machine is not suitable in galvanometer motor.Mesh
External galvanometer motor is mostly used greatly in the galvanometer control research of preceding researcher, and the characterisitic parameter of galvanometer motor is directly obtained from manufacturer
, and domestic galvanometer manufacturer does not provide these key parameters, and there has been no related personnel to the spy of domestic galvanometer motor
Property measurement method of parameters research.
Summary of the invention
The present invention is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide a kind of laser scanning galvanometer motor torque
Constant measuring method.
The present invention provides a kind of laser scanning galvanometer motor torque constant measuring methods, for measuring turning for galvanometer motor
Square constant, has the feature that, includes the following steps:
Step 1, determine test needed for each component, including galvanometer motor, drive control device, filament, pulley, counterweight and
Oscillograph, and reflecting optics are connected on the armature spindle of galvanometer motor；
Step 2, galvanometer motor is connect with drive control device, is then powered, at this point, galvanometer motor is under closed-loop control
Initial equilibrium conditions, then filament is wrapped on reflecting optics again, and by two free ends of filament from opposite direction
It draws, bypasses a pulley respectively；
Step 3, the counterweight equal in two free ends of filament difference sprung mass, is converted to application for the gravity of counterweight
In the pulling force on reflecting optics, change the direction of power by adjusting the position of pulley, adjustment filament makes it perpendicular to reflecting mirror
The resultant couple τ being applied on armature spindle is then calculated so that the arm of force is the half of reflecting optics width in piece surface, counts
It is as follows to calculate formula:
Step 4, it is connected using current sampling resistor R with stator coil in the current feedback circuit in drive control device,
And oscilloscope measurement will be used to obtain feedback voltage V after the voltage amplification at the both ends current sampling resistor R by operational amplifier, and
After coil current i is calculated, calculation formula is as follows:
I=V/K (2)；
Step 5, according to resultant couple τ and coil current i, torque constant k is calculatedm, calculation formula is as follows:
Step 6, the quality for changing counterweight is repeatedly tested, and is obtained multiple torque constants, is then averaged and obtains
The torque constant of galvanometer motor,
In formula (1)-formula (3), M is the quality of counterweight, and unit is gram that g is acceleration of gravity, and x is reflecting optics width, single
Position is millimeter, and K is current sample amplification coefficient.
In laser scanning galvanometer motor torque constant measuring method provided by the invention, there can also be such spy
Sign: where the initial equilibrium conditions that the galvanometer motor in step 2 is under closed-loop control are command signal reflecting optics when being 0
Location.
The action and effect of invention
Laser scanning galvanometer motor torque constant measuring method involved in involved according to the present invention, because counterweight produces
Raw gravity can be converted into the pulling force acted on galvanometer motor reflecting optics, additionally it is possible to which the direction for adjusting pulling force makes itself and mirror
Face is vertical, so that the arm of force is always the half of reflecting optics width, so can be by changing the quality of counterweight come accurate quantification
Change be applied to the torque on rotator for oscilation mirror motor axis；Because fixed after applying torque to galvanometer motor axis under closed loop conditions
Stabling current can be generated in subcoil, and forms trimming moment, so galvanometer motor can be made to keep stable state；Because using
The output voltage at the both ends oscilloscope measurement current sampling resistor R, so the electric current in stator coil can be obtained by calculation；Cause
For that can be obtained by the torque constant of corresponding torque and the available galvanometer motor of electric current, while by the quality of change counterweight
Multiple torque constant values, so the exact value for being averaged to obtain institute's vibration measuring mirror motor torque constant can be led to.
Detailed description of the invention
Fig. 1 is galvanometer motor schematic diagram in the embodiment of the present invention；
Fig. 2 is the original state schematic diagram that filament bypasses after pulley in the embodiment of the present invention；
Fig. 3 is the schematic diagram for applying torque in the embodiment of the present invention on reflecting optics；
Fig. 4 is stator coil current measurement schematic diagram in the embodiment of the present invention.
Specific embodiment
In order to which the technological means for realizing the present invention is easy to understand with effect, with reference to embodiments and attached drawing is to this
Invention is specifically addressed.
Embodiment:
A kind of laser scanning galvanometer motor torque constant measuring method of the present embodiment, for measuring turning for galvanometer motor 1
Square constant, includes the following steps:
Fig. 1 is galvanometer motor schematic diagram in the embodiment of the present invention.
Step 1, each component needed for determining test, including galvanometer motor 1, drive control device 2, filament 3, pulley 4, counterweight
And oscillograph, and reflecting optics 6 are connected on the armature spindle of galvanometer motor 15, as shown in Figure 1.
Fig. 2 is the original state schematic diagram that filament bypasses after pulley in the embodiment of the present invention.
Step 2, galvanometer motor 1 is connect with drive control device 2, is then powered, at this point, galvanometer motor 1 is in closed loop control
Filament 3, is then wrapped on reflecting optics 6 by the initial equilibrium conditions under system again, and by two free ends of filament 3 from opposite
Direction draw, respectively bypass a pulley 4, as shown in Figure 2.
Wherein, the initial equilibrium conditions that galvanometer motor 1 is under closed-loop control are command signal when being 0 locating for reflecting optics
Position, in addition, galvanometer motor 1 is in order to keep equilibrium state, in coil when applying a moment of face to galvanometer motor 1
Can generate electric current and formed with moment of face contrary torque equal in magnitude, the proportionate relationship of torque and electric current is that torque is normal
Number.
Fig. 3 is the schematic diagram for applying torque in the embodiment of the present invention on reflecting optics.
Step 3, the counterweight equal in two free ends of filament 3 difference sprung mass, the gravity of counterweight is converted to and is applied
The pulling force being added on reflecting optics 6, changes the direction of power by adjusting the position of pulley 4, and adjustment filament 3 makes it perpendicular to anti-
6 surface of eyeglass is penetrated, so that the arm of force is the half of 6 width of reflecting optics, the resultant couple being applied on armature spindle 5 is then calculated
τ, unit are Newton meter, and calculation formula is as follows:
Apply torque and pulley 4 is adjusted, as shown in figure 3, in addition, by exerting a force simultaneously to protect to reflecting optics upper and lower side
Demonstrate,prove the stress balance of armature spindle.
Fig. 4 is stator coil current measurement schematic diagram in the embodiment of the present invention.
Step 4, it is connected using current sampling resistor R with stator coil in the current feedback circuit in drive control device 2,
And oscilloscope measurement will be used to obtain feedback voltage V after the voltage amplification at the both ends current sampling resistor R by operational amplifier, such as
Shown in Fig. 4, coil current i is then calculated, calculation formula is as follows:
I=V/K (2).
Step 5, according to resultant couple τ and coil current i, torque constant k is calculatedm, calculation formula is as follows:
Step 6, the quality for changing counterweight is repeatedly tested, and is obtained multiple torque constants, is then averaged and obtains
The torque constant of galvanometer motor 1.
In formula (1)-formula (3), M is the quality of counterweight, and unit is gram that g is acceleration of gravity, and x is reflecting optics width, single
Position is millimeter, and K is current sample amplification coefficient.
The action and effect of embodiment
The laser scanning galvanometer motor torque constant measuring method according to involved in the present embodiment, because of the weight that counterweight generates
Power can be converted into the pulling force acted on galvanometer motor reflecting optics, additionally it is possible to which the direction for adjusting pulling force makes it hang down with mirror surface
Directly, so that the arm of force is always the half of reflecting optics width, so quality the changing come accurate quantification of change counterweight can be passed through
Become the torque being applied on rotator for oscilation mirror motor axis；Because under closed loop conditions, after applying torque to galvanometer motor axis, stator line
Stabling current can be generated in circle, and forms trimming moment, so galvanometer motor can be made to keep stable state；Because using oscillography
Device measures the output voltage at the both ends current sampling resistor R, so the electric current in stator coil can be obtained by calculation；Because logical
The quality crossed the torque constant of corresponding torque and the available galvanometer motor of electric current, while passing through change counterweight can obtain multiple
Torque constant value, so the exact value for being averaged to obtain institute's vibration measuring mirror motor torque constant can be led to.
Above embodiment is preferred case of the invention, the protection scope being not intended to limit the invention.
Claims (2)
1. a kind of laser scanning galvanometer motor torque constant measuring method, for measuring the torque constant of galvanometer motor, feature
It is, includes the following steps:
Step 1, determine test needed for each component, including the galvanometer motor, drive control device, filament, pulley, counterweight and
Oscillograph, and reflecting optics are connected on the armature spindle of the galvanometer motor；
Step 2, the galvanometer motor is connect with the drive control device, is then powered, closed at this point, the galvanometer motor is in
The filament, is then wrapped on the reflecting optics, and by the two of the filament by the initial equilibrium conditions under ring control again
A free end is drawn from opposite direction, bypasses a pulley respectively；
Step 3, the counterweight equal in two free end difference sprung mass of the filament, by the weight of the counterweight
Power is converted to the pulling force being applied on the reflecting optics, changes the direction of power by adjusting the position of pulley, described in adjustment
It is calculated then so that the arm of force is the half of the reflecting optics width perpendicular to the reflecting optics surface in filament
The resultant couple τ being applied on the armature spindle, calculation formula are as follows:
Step 4, it is connected using current sampling resistor R with stator coil in the current feedback circuit in the drive control device,
And oscilloscope measurement will be used to obtain feedback voltage after the voltage amplification at the current sampling resistor both ends by operational amplifier
Coil current i is then calculated in V, and calculation formula is as follows:
I=V/K (2)；
Step 5, according to the resultant couple τ and coil current i, torque constant k is calculatedm, calculation formula is as follows:
Step 6, the quality for changing the counterweight is repeatedly tested, and is obtained multiple torque constants, is then averaged i.e.
The torque constant of the galvanometer motor is obtained,
In formula (1)-formula (3), M is the quality of the counterweight, and unit is gram that g is acceleration of gravity, and x is reflecting optics width, single
Position is millimeter, and K is current sample amplification coefficient.
2. laser scanning galvanometer motor torque constant measuring method according to claim 1, it is characterised in that:
Wherein, the initial equilibrium conditions that the galvanometer motor in the step 2 is under closed-loop control are command signal when being 0
The location of reflecting optics.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910467156.3A CN110146320B (en) | 2019-05-31 | 2019-05-31 | Method for measuring torque constant of laser scanning galvanometer motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910467156.3A CN110146320B (en) | 2019-05-31 | 2019-05-31 | Method for measuring torque constant of laser scanning galvanometer motor |
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| CN110146320A true CN110146320A (en) | 2019-08-20 |
| CN110146320B CN110146320B (en) | 2021-01-22 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603997A (en) * | 2009-07-03 | 2009-12-16 | 哈尔滨工业大学 | Testing parameters of synchronous motor and realize the device of this method |
| CN101930054B (en) * | 2010-05-11 | 2012-03-21 | 常州工学院 | Portable motor parameter-detecting device |
| CN203287499U (en) * | 2013-05-27 | 2013-11-13 | 宁波伊士通技术股份有限公司 | Apparatus for testing torque constant of permanent-magnet servo synchronous motor |
| CN104677534A (en) * | 2015-03-01 | 2015-06-03 | 叶露微 | Micromotor torque measuring device using rope and pulley method |
| CN206523605U (en) * | 2017-02-15 | 2017-09-26 | 大澳电器（江苏）有限公司 | The torque characteristics test device of wheel hub motor model machine |
-
2019
- 2019-05-31 CN CN201910467156.3A patent/CN110146320B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603997A (en) * | 2009-07-03 | 2009-12-16 | 哈尔滨工业大学 | Testing parameters of synchronous motor and realize the device of this method |
| CN101930054B (en) * | 2010-05-11 | 2012-03-21 | 常州工学院 | Portable motor parameter-detecting device |
| CN203287499U (en) * | 2013-05-27 | 2013-11-13 | 宁波伊士通技术股份有限公司 | Apparatus for testing torque constant of permanent-magnet servo synchronous motor |
| CN104677534A (en) * | 2015-03-01 | 2015-06-03 | 叶露微 | Micromotor torque measuring device using rope and pulley method |
| CN206523605U (en) * | 2017-02-15 | 2017-09-26 | 大澳电器（江苏）有限公司 | The torque characteristics test device of wheel hub motor model machine |
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| CN110146320B (en) | 2021-01-22 |
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