CN106291058A - The counter electromotive force measurement apparatus of a kind of motor and method - Google Patents
The counter electromotive force measurement apparatus of a kind of motor and method Download PDFInfo
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- CN106291058A CN106291058A CN201610669166.1A CN201610669166A CN106291058A CN 106291058 A CN106291058 A CN 106291058A CN 201610669166 A CN201610669166 A CN 201610669166A CN 106291058 A CN106291058 A CN 106291058A
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- 238000005259 measurement Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005070 sampling Methods 0.000 claims description 28
- 230000005611 electricity Effects 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000523 sample Substances 0.000 description 38
- 230000001360 synchronised effect Effects 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- 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
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Abstract
The invention discloses a kind of counter electromotive force measurement apparatus and the method for motor, relate to electric motors.Described device includes that sample unit and waveform determine parts；Described sample unit is connected with motor stator, for gather described motor stator the most biphase between voltage signal, wherein, when the rotor speed at described motor reaches setting speed threshold value, electric machine controller stop output drive pulse signal；Described waveform determines that parts electrically connect with described sample unit, for obtaining the described voltage signal that described sample unit gathers, determine that described electric machine controller stops the waveform of voltage signal corresponding to the motor stator after exporting drive pulse signal, determine the value of counter electromotive force with the waveform that the counter electromotive force according to described motor is corresponding.Technical solution of the present invention has reached the existing metering system of simplification, improves the effect of certainty of measurement.
Description
Technical field
The present embodiments relate to motor technology, particularly relate to counter electromotive force measurement apparatus and the method for a kind of motor.
Background technology
Permagnetic synchronous motor because having the series of advantages such as high efficiency, high torque (HT), high power density and good speed adjustment features,
Industry, traffic and household appliance technical field are used widely.
Counter electromotive force is an important parameter of the control of permagnetic synchronous motor.Present stage measures the sky of permagnetic synchronous motor
Carry counter electromotive force and typically use additional prime mover drawing method or manually to methods such as rotor acceleration.Such as, prime mover is used to drag
Dynamic permagnetic synchronous motor, makes rotor reach rated speed, and permanent-magnetic synchronous motor stator is opened a way, by oscilloscope measurement stator electricity
Pressure, records no-load back electromotive force of permanent magnet motor with this.Owing to oscillographic input voltage limits, it is desirable to the normal speed of rotor is relatively
Low, again because there is damping, the decay of back emf waveform is very fast, affects the accuracy that counter electromotive force is measured.Meanwhile, former dynamic
When machine is installed with motor, special test equipment is needed to ensure accurate axiality and sufficiently small damping between rotor, even
Connect operation comparatively laborious.It addition, when measuring the counter electromotive force of motor of product (such as compressor) of outsourcing, need motor from this
Product disassembles and just can measure, add the complexity that counter electromotive force is measured.
Summary of the invention
The present invention provides a kind of counter electromotive force measurement apparatus and the method for motor, to simplify existing metering system, improves
Certainty of measurement.
First aspect, embodiments provides the counter electromotive force measurement apparatus of a kind of motor, including: sample unit and
Waveform determines parts；
Described sample unit is connected with motor stator, for gather described motor stator the most biphase between voltage letter
Number, wherein, when the rotor speed at described motor reaches setting speed threshold value, electric machine controller stops output driving pulse letter
Number；
Described waveform determines that parts electrically connect with described sample unit, for obtaining the described electricity that described sample unit gathers
Pressure signal, determines that described electric machine controller stops the ripple of voltage signal corresponding to the motor stator after exporting drive pulse signal
Shape, determines the value of counter electromotive force with the waveform that the counter electromotive force according to described motor is corresponding.
Second aspect, the embodiment of the present invention additionally provides the counter electromotive force measurement apparatus of a kind of motor, and this device includes: survey
Amount controller, sample unit, disconnecting switch and waveform determine parts；
Described sample unit is connected with motor stator, for gather described motor stator the most biphase between voltage letter
Number, wherein, run under the control of the drive pulse signal that described motor exports at electric machine controller；
Described disconnecting switch is connected between described electric machine controller and described motor, for receiving switch OFF letter
Number time, the circuit disconnected between described electric machine controller and motor is connected；
Described waveform determines that parts electrically connect with described sample unit, for obtaining the described electricity that described sample unit gathers
Pressure signal, determines that described electric machine controller stops the waveform of the voltage signal after exporting drive pulse signal；
With described electric machine controller, described disconnecting switch and described waveform, described Mersure Controler determines that parts are electrically connected respectively
Connecing, for obtaining the rotor speed of motor from described electric machine controller, when rotor speed exceedes setting speed threshold value, output is opened
Close cut-off signals to described disconnecting switch；
And, obtain the waveform that described waveform determines the voltage signal of parts, determine the electricity of the waveform that counter electromotive force is corresponding
It is pressed with valid value and frequency, calculates the value of counter electromotive force according to described voltage effective value and frequency.
The third aspect, the embodiment of the present invention additionally provides the counter electromotive force measuring method of a kind of motor, and the method includes:
Sample unit gather described motor stator the most biphase between voltage signal, wherein, the rotor at motor turns
When speed reaches setting speed threshold value, electric machine controller stops output drive pulse signal；
Waveform determines the described voltage signal that sample unit described in component retrieval gathers, and determines that described electric machine controller stops
Export the waveform of voltage signal corresponding to the motor stator after drive pulse signal, with the ripple of the counter electromotive force according to described motor
Shape determines the value of counter electromotive force.
Fourth aspect, the embodiment of the present invention additionally provides the counter electromotive force measuring method of a kind of motor, and the method includes:
Sample unit gather described motor stator the most biphase between voltage signal, wherein, described motor is at motor
Run under the control of the drive pulse signal of controller output；
Disconnecting switch, when receiving switch OFF signal, disconnects the circuit between described electric machine controller and motor even
Connect；
Waveform determines the described voltage signal that sample unit described in component retrieval gathers, and determines that described electric machine controller stops
The waveform of the voltage signal after output drive pulse signal；
Mersure Controler obtains the rotor speed of motor from described electric machine controller, exceedes setting speed threshold in rotor speed
During value, output switch cut-off signals to described disconnecting switch；Obtain the waveform that described waveform determines the voltage signal of parts, determine
The voltage effective value of the waveform that counter electromotive force is corresponding and frequency, calculate counter electromotive force according to described voltage effective value and frequency
Value.
The present invention drives the rotating speed of rotor to stop driving when reaching setting speed threshold value by electric machine controller, and leads to
Cross gather the most biphase in stator between voltage signal corresponding to counter electromotive force, then, waveform determine this electricity of component retrieval
Pressure signal, determines the waveform of the waveform corresponding with this voltage signal, i.e. counter electromotive force, determines anti-electricity according to the waveform of counter electromotive force
The value of kinetic potential.The measurement operation that technical solution of the present invention solves current counter electromotive force measuring method is comparatively laborious, and waveform attenuating is relatively
Cause the problem that measurement accuracy is the highest soon, owing to being provided with sample unit, it is not necessary to consider that waveform determines the measurement scope of parts,
Can measure at a high speed, strengthen certainty of measurement；Meanwhile, electric machine controller is used directly to drive, it is not necessary to tear open from the product encapsulated
Unload and obtain motor and the dragging of additional prime mover, reduce and measure cost, reached the existing metering system of simplification, improve certainty of measurement
Effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the counter electromotive force measurement apparatus of the motor in the embodiment of the present invention one；
Fig. 2 is that the counter electromotive force measurement apparatus utilizing the present embodiment to provide in the embodiment of the present invention one measures counter electromotive force
Method flow diagram；
Fig. 3 is the structural representation in the counter electromotive force measurement apparatus of the motor in the embodiment of the present invention two；
Fig. 4 is that the counter electromotive force measurement apparatus utilizing the present embodiment to provide in the embodiment of the present invention two measures counter electromotive force
Method flow diagram.
Detailed description of the invention
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just
Part related to the present invention is illustrate only rather than entire infrastructure in description, accompanying drawing.
Embodiment one
The structural representation of the counter electromotive force measurement apparatus of the motor that Fig. 1 provides for the embodiment of the present invention one, the present embodiment
It is applicable to provide by the controller of electric drilling match drive, thus determines counter electromotive force by analyzing the waveform of counter electromotive force
The situation of value.As it is shown in figure 1, this counter electromotive force measurement apparatus specifically includes: sample unit 110 and waveform determine parts 120.
Wherein, this sample unit 110 is connected with motor stator, for gather described motor stator the most biphase between
Voltage signal, wherein, when the rotor speed of described motor 150 reaches setting speed threshold value, electric machine controller 140 stops output
Drive pulse signal.Electric machine controller 140 is the control equipment that motor 150 is supporting, such as, can be converter or square wave control
The controllers such as device.As it is shown in figure 1, electric machine controller 140 connects alternating current power supply (according to controller specified input type selecting), outfan
The corresponding contact (U phase, V phase and W phase in figure) connecting each phase of motor stator winding, with export drive pulse signal to stator around
Group, and then drive rotor to rotate, and rotor speed may be displayed on electric machine controller 140.Tester observes rotor
When rotating speed reaches setting speed threshold value, cut off the input of alternating current power supply or close electric machine controller 140, so that electric machine controller
140 stop output drive pulse signal to motor 150.Owing to there is electromagnetic induction, motor stator winding exists and input
The counter electromotive force that voltage signal is in opposite direction.
On the basis of technique scheme, disconnecting switch 130 of connecting between electric machine controller 140 and motor 150,
When receiving switch OFF signal, the circuit disconnected between described electric machine controller 140 and motor 150 is connected, it is achieved test person
Member observes when rotor speed reaches setting speed threshold value, makes electric machine controller 140 stop by the way of disconnecting disconnecting switch 130
Only export drive pulse signal.Disconnecting switch 130 is set between electric machine controller 140 and motor 150, has isolated interference letter
Number, it is to avoid the electric capacity electric discharge impact on the back emf waveform of motor 150 in electric machine controller 140, improve certainty of measurement.
Exemplary, as it is shown in figure 1, this sample unit 110 includes sampling resistor 112 and at least two current limliting divider resistance
111, described current limliting divider resistance 111 is connected with U phase phase resistance and the W phase phase resistance of stator respectively, described current limliting divider resistance
111 and sampling resistor 112 connect.Wherein, sampling resistor 112 is different with the resistance of current limliting divider resistance 111.
On the basis of technique scheme, described current limliting divider resistance 111 and/or described sampling resistor 112 are variable
Rheostat, for adjusting the resistance ratio of current limliting divider resistance 111 and sampling resistor 112；Or, described current limliting divider resistance
111 and/or the two ends of described sampling resistor 112 be parallel with the resistance setting resistance.
Exemplary, this current limliting divider resistance 111 and the variable rheostat that sampling resistor 112 is that resistance is different, by adjusting
Whole variable rheostatic resistance, it is achieved adjust current limliting divider resistance 111 and the resistance ratio of sampling resistor 112, thus so that ripple
Shape determines that the voltage range measured by parts 120 (such as oscillograph) is optimum, disturbs minimum simultaneously.
This waveform determines that parts 120 electrically connect with described sample unit 110, is used for obtaining described sample unit 110 and gathers
Described voltage signal, determine described electric machine controller 140 stop output drive pulse signal after electricity corresponding to motor stator
The waveform of pressure signal, determines the value of counter electromotive force with the waveform that the counter electromotive force according to described motor 150 is corresponding.
On the basis of technique scheme, this waveform determines that parts 120 can be oscillograph, described oscillograph and sampling
Resistance 112 is in parallel, for measuring the voltage signal of sampling resistor 112, and shows described voltage signal with the form of waveform.
Exemplary, voltage probe on oscillograph connects the contact at sampling resistor 112 two ends, to detect sampling resistor 112
On voltage signal, and voltage waveform is shown on oscilloscope display screen.Before detectable voltage signals, can first debug oscillography
The time delay of device and sampling bandwidth, in order to oscillograph catches the unloaded waveform of motor 150.
Fig. 2 shows that the counter electromotive force measurement apparatus utilizing the present embodiment to provide in the embodiment of the present invention one is measured the most electronic
The method flow diagram of gesture.As in figure 2 it is shown, the method specifically includes following steps:
Step 210, sample unit gather motor stator the most biphase between voltage signal.
Wherein, the sampling resistor in sample unit be connected on motor stator the most biphase between, stop at electric machine controller
Only after output drive pulse signal, the counter electromotive force produced due to electromagnetic induction effect in stator winding is in leading position, presses down
Rotor processed rotates up to rotor to be stopped.
Stopping after motor output drive pulse signal at electric machine controller, the induced potential in stator winding is corresponding to electricity
The counter electromotive force of machine, obtains counter electromotive force by sampling resistor.In order to prevent the counter electromotive force that higher rotating speed is corresponding from exceeding ripple
Shape determines the measurement scope of parts, stator each mutually on connect a current limliting divider resistance, by adjusting current limliting divider resistance and adopting
The resistance ratio of sample resistance, it is achieved it is optimum that waveform determines that parts measure voltage range, and interference minimum.
Concrete it may be that connect electric machine controller, chopper, motor, sample unit according to the structural representation shown in Fig. 1
Parts are determined with waveform.Wherein, waveform determines that parts are oscillograph.Oscillographic voltage probe connects the output of sample unit and touches
Point.After carefully connecting the wire, open oscillograph.Connecting alternating current power supply, the rotating speed making motor operate in setting by electric machine controller (leads to
Can be often rated speed).Now, debug oscillographic time delay and sampling width, make the unloaded waveform caught optimal
(amplitude and the constant sine wave of frequency can be observed on oscillograph).Hereafter, cut-off breaker makes controller stop
Output drive pulse signal is to motor.
Step 220, waveform determine the described voltage signal that sample unit described in component retrieval gathers, and determine described motor control
Device processed stops the waveform of voltage signal corresponding to the motor stator after output drive pulse signal.
Wherein, waveform determines that parts can be oscillograph, by oscillograph recording no-load back electromotive force waveform, with according to anti-
EMF waveform determines the value of counter electromotive force.
Exemplary, virtual value and the frequency of voltage is determined according to the waveform of counter electromotive force.Wherein, the virtual value root of voltage
Determining according to the peak-trough electricity pressure difference of back emf waveform in oscillograph, frequency is the inverse in cycle.Can calculate according to frequency
Rotor speed, so, the value of counter electromotive force is the voltage effective value result divided by rotor speed.
Exemplary, aforesaid way can be used to calculate non-sinusoidal counter-electromotive-force or the value of sinusoidal counter electromotive force of motor.
The technical scheme of the present embodiment, when driving the rotating speed of rotor to reach setting speed threshold value by electric machine controller
Stop driving, and by gather in stator the most biphase between voltage signal corresponding to counter electromotive force, then, waveform determine
This voltage signal of component retrieval, determines the waveform of the waveform corresponding with this voltage signal, i.e. counter electromotive force, according to counter electromotive force
Waveform determines the value of counter electromotive force.The measurement operation that technical solution of the present invention solves current counter electromotive force measuring method is more numerous
Trivial, waveform attenuating comparatively fast causes the problem that measurement accuracy is the highest, owing to being provided with sample unit, it is not necessary to consider that waveform determines portion
The measurement scope of part, can measure at a high speed, strengthens certainty of measurement；Meanwhile, electric machine controller is used directly to drive, it is not necessary to from sealing
In the product of dress, dismounting obtains motor and additional prime mover drags, and reduces and measures cost, has reached the existing metering system of simplification,
Improve the effect of certainty of measurement.
Embodiment two
Fig. 3 is the structural representation in the counter electromotive force measurement apparatus of the motor in the embodiment of the present invention two.The present embodiment
It is applicable to automatic control electric machine controller and drives motor, gather and analyze the waveform of counter electromotive force and determine the value of counter electromotive force
Situation.As it is shown in figure 1, this counter electromotive force measurement apparatus specifically includes: Mersure Controler 310, sample unit 350, disconnecting switch
330 and waveform determine parts 360.
Described sample unit 350 is connected with motor stator, for gather described motor stator the most biphase between electricity
Pressure signal, wherein, under the control of the drive pulse signal that described motor 340 export at electric machine controller 320, operation, makes motor
340 reach stable setting speed threshold value (can be rated speed).Sample unit 350 includes sampling resistor and at least two limit
Flow point piezoresistance, the phase resistance series connection that described current limliting divider resistance is different from stator respectively, described current limliting divider resistance and adopting
Sample resistant series.Adjustable to the phase resistance of stator and resistance current limliting divider resistance is connected, and current limliting divider resistance can with resistance
The sampling resistor series connection become, can adjust by adjusting current limliting divider resistance and the resistance ratio of sampling resistor according to voltage divider principle
The voltage of whole sampling resistor output.
Described disconnecting switch 330 is connected between described electric machine controller 320 and described motor 340, for receiving
During switch OFF signal, the circuit disconnected between described electric machine controller 320 and motor 340 is connected.Wherein, disconnecting switch 330
It can be the device with isolation features such as chopper, photoelectrical coupler.Disconnecting switch 330 receives cut-off signals, according to shutoff
Signal disconnects the connection between electric machine controller 320 and motor 340.Exemplary, cut-off signals can be Mersure Controler 310
Export the shutoff instruction to disconnecting switch 330, or the shutoff request etc. of user's input.
Described waveform determines that parts 360 electrically connect with described sample unit 350, is used for obtaining described sample unit 350 and adopts
The described voltage signal of collection, determines that described electric machine controller 320 stops the waveform of the voltage signal after exporting drive pulse signal.
Exemplary, waveform determines that parts 360 obtain the voltage signal that sample unit 350 is gathered, and determines that this voltage signal is corresponding
Voltage waveform.Owing to the waveform of back emf waveform with the drive pulse signal of electric machine controller 320 output constitutes reverse pass
System.Stop the moment of output drive pulse signal at electric machine controller 320, waveform there will be flex point.Using this point as instead
The waveform starting point of electromotive force, till rotor stops operating, determines the waveform of voltage signal during this, is counter electromotive force
Corresponding waveform.
Described Mersure Controler 310 is true with described electric machine controller 320, described disconnecting switch 330 and described waveform respectively
Limiting-members 360 electrically connects, and for obtaining the rotor speed of motor 340 from described electric machine controller 320, exceedes in rotor speed and sets
When determining rotary speed threshold value, output switch cut-off signals to described disconnecting switch 330.Mersure Controler 310 is detecting turning of electronics
After rotor speed reaches the time span of threshold speed and the stable setting set, send cut-off signals to disconnecting switch 330.
And, obtain the waveform that described waveform determines the voltage signal of parts 360, determine the waveform that counter electromotive force is corresponding
Voltage effective value and frequency, calculate the value of counter electromotive force according to described voltage effective value and frequency.Exemplary, according to corresponding to
The waveform of counter electromotive force determines virtual value and the frequency of voltage.The rotating speed of rotor can be calculated according to frequency, so, the most electronic
The value of gesture is the virtual value result divided by rotor speed of voltage.
Fig. 4 shows that the counter electromotive force measurement apparatus utilizing the present embodiment to provide in the embodiment of the present invention two is measured the most electronic
The method flow diagram of gesture.As shown in Figure 4, the method specifically includes following steps:
Step 410, sample unit gather described motor stator the most biphase between voltage signal.
Wherein, run under the control of the drive pulse signal that described motor exports at electric machine controller.The knot of sample unit
Structure and function are same as the previously described embodiments, and here is omitted.
Step 420, disconnecting switch, when receiving switch OFF signal, disconnect between described electric machine controller and motor
Circuit connects.
Disconnecting switch electrically connects with Mersure Controler, and when receiving the shutoff instruction that Mersure Controler sends, performing should
Turning off instruction, to disconnect the connection of electric machine controller and motor, wherein motor can be permagnetic synchronous motor.Can substitute
It is that disconnecting switch can also disconnect electric machine controller and be connected with the circuit of motor under the control turning off request of user's input.
Step 430, waveform determine the described voltage signal that sample unit described in component retrieval gathers, and determine described motor control
Device processed stops the waveform of the voltage signal after output drive pulse signal.
Waveform determines the voltage signal that component retrieval sample unit is gathered, and stops output driving pulse at electric machine controller
The moment of signal, using voltage reversal occurs on waveform flex point as the waveform starting point of counter electromotive force, rotor is stopped operating
Point as waveform terminal, determines the waveform of voltage signal during this, is the waveform that counter electromotive force is corresponding.
Step 440, Mersure Controler obtain the rotor speed of motor from described electric machine controller, exceed in rotor speed and set
When determining rotary speed threshold value, output switch cut-off signals to described disconnecting switch.
Electric machine controller determines the rotor speed of current motor according to current output voltage, in the request of Mersure Controler
Under, rotor speed is sent to Mersure Controler by electric machine controller.Acquired rotor speed is turned by Mersure Controler with setting
Speed threshold value compares, and when the rotor speed obtained exceedes setting speed threshold value, output cut-off signals to disconnecting switch, with control
Disconnecting switch processed disconnects.
Step 450, obtain the waveform that described waveform determines the voltage signal of parts, determine the waveform that counter electromotive force is corresponding
Voltage effective value and frequency, calculate the value of counter electromotive force according to described voltage effective value and frequency.
In the moment that disconnecting switch disconnects, producing counter electromotive force in the stator windings, this counter electromotive force hinders turning of rotor
Dynamic, and gradually decay under the effect of damping.The waveform recording of this counter electromotive force in waveform determines parts, Mersure Controler from
Waveform determines the waveform obtaining this counter electromotive force in parts, determines voltage effective value and the frequency of its correspondence.Permissible according to frequency
Calculate the rotating speed of rotor, so, the value of counter electromotive force is the virtual value result divided by rotor speed of voltage.
Exemplary, aforesaid way can be used to calculate non-sinusoidal counter-electromotive-force or the value of sinusoidal counter electromotive force of motor.
The technical scheme of the present embodiment, drives electricity by Mersure Controler and disconnecting switch automatic control electric machine controller
Machine, and the stator voltage of parts is determined by Mersure Controler acquisition waveform, determine that the voltage of the waveform that counter electromotive force is corresponding has
Valid value and frequency, calculate the value of counter electromotive force according to described voltage effective value and frequency.The technical scheme decapacitation of the present embodiment is enough
Reach outside the effect of above-described embodiment, realize automatically calculating the function of counter electromotive force owing to have employed Mersure Controler, reduce
The error introduced because of manual operation, has reached the existing metering system of simplification, improves the effect of certainty of measurement.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious change,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although by above example, the present invention is carried out
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other Equivalent embodiments more can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (11)
1. the counter electromotive force measurement apparatus of a motor, it is characterised in that including: sample unit and waveform determine parts；
Described sample unit is connected with motor stator, for gather described motor stator the most biphase between voltage signal,
Wherein, when the rotor speed at described motor reaches setting speed threshold value, electric machine controller stops output drive pulse signal；
Described waveform determines that parts electrically connect with described sample unit, for obtaining the described voltage letter that described sample unit gathers
Number, determine that described electric machine controller stops the waveform of voltage signal corresponding to the motor stator after exporting drive pulse signal, with
The waveform that counter electromotive force according to described motor is corresponding determines the value of counter electromotive force.
Device the most according to claim 1, it is characterised in that also include disconnecting switch；Described disconnecting switch is connected on institute
State between electric machine controller and described motor, for when receiving switch OFF signal, disconnect described electric machine controller and electricity
Circuit between machine connects.
Device the most according to claim 1, it is characterised in that described sample unit includes sampling resistor and at least two limit
Flow point piezoresistance, the phase resistance series connection that described current limliting divider resistance is different from stator respectively, described current limliting divider resistance and adopting
Sample resistant series.
Device the most according to claim 3, it is characterised in that described current limliting divider resistance and/or described sampling resistor are
Variable rheostat, for adjusting the resistance ratio of current limliting divider resistance and sampling resistor；
Or, the two ends of described current limliting divider resistance and/or described sampling resistor are parallel with the resistance setting resistance.
Device the most according to claim 3, it is characterised in that described waveform determines that parts are oscillographs, described oscillograph
In parallel with sampling resistor, for measuring the voltage signal of sampling resistor, and show described voltage signal with the form of waveform.
6. the counter electromotive force measurement apparatus of a motor, it is characterised in that including: Mersure Controler, sample unit, disconnecting switch
Parts are determined with waveform；
Described sample unit is connected with motor stator, for gather described motor stator the most biphase between voltage signal,
Wherein, run under the control of the drive pulse signal that described motor exports at electric machine controller；
Described disconnecting switch is connected between described electric machine controller and described motor, for receiving switch OFF signal
Time, the circuit disconnected between described electric machine controller and motor is connected；
Described waveform determines that parts electrically connect with described sample unit, for obtaining the described voltage letter that described sample unit gathers
Number, determine that described electric machine controller stops the waveform of the voltage signal after exporting drive pulse signal；
With described electric machine controller, described disconnecting switch and described waveform, described Mersure Controler determines that parts electrically connect respectively,
For obtaining the rotor speed of motor, when rotor speed exceedes setting speed threshold value, output switch from described electric machine controller
Cut-off signals is to described disconnecting switch；
And, obtain the waveform that described waveform determines the voltage signal of parts, determine that the voltage of the waveform that counter electromotive force is corresponding has
Valid value and frequency, calculate the value of counter electromotive force according to described voltage effective value and frequency.
Device the most according to claim 6, it is characterised in that described sample unit includes sampling resistor and at least two limit
Flow point piezoresistance, the phase resistance series connection that described current limliting divider resistance is different from stator respectively, described current limliting divider resistance and adopting
Sample resistant series.
8. the counter electromotive force measuring method of a motor, it is characterised in that including:
Sample unit gather motor stator the most biphase between voltage signal, wherein, the rotor speed at motor reaches to set
When determining threshold speed, electric machine controller stops output drive pulse signal；
Waveform determines the described voltage signal that sample unit described in component retrieval gathers, and determines that described electric machine controller stops output
The waveform of the voltage signal that motor stator after drive pulse signal is corresponding, the waveform with the counter electromotive force according to described motor is true
Determine the value of counter electromotive force.
Method the most according to claim 8, it is characterised in that when the rotor speed at motor reaches setting speed threshold value,
Electric machine controller stops output drive pulse signal, including:
After described electric machine controller determines current rotor rotating speed according to the magnitude of voltage of the drive pulse signal of output, at described motor
Show on controller；
If receive halt instruction when current rotor rotating speed reaches and sets threshold value or dump detected, then stop output and drive
Moving pulse signal.
Method the most according to claim 8, it is characterised in that determine sample unit described in component retrieval at described waveform
Before the described voltage signal gathered, also include:
Perform the adjustment instruction of user's input, determine time delay and the sampling width of parts adjusting described waveform.
The counter electromotive force measuring method of 11. 1 kinds of motors, it is characterised in that including:
Sample unit gather described motor stator the most biphase between voltage signal, wherein, described motor is in motor control
Run under the control of the drive pulse signal of device output；
Disconnecting switch is when receiving switch OFF signal, and the circuit disconnected between described electric machine controller and motor is connected；
Waveform determines the described voltage signal that sample unit described in component retrieval gathers, and determines that described electric machine controller stops output
The waveform of the voltage signal after drive pulse signal；
Mersure Controler obtains the rotor speed of motor from described electric machine controller, exceedes setting speed threshold value in rotor speed
Time, output switch cut-off signals to described disconnecting switch；
And, obtain the waveform that described waveform determines the voltage signal of parts, determine that the voltage of the waveform that counter electromotive force is corresponding has
Valid value and frequency, calculate the value of counter electromotive force according to described voltage effective value and frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610669166.1A CN106291058A (en) | 2016-08-15 | 2016-08-15 | The counter electromotive force measurement apparatus of a kind of motor and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610669166.1A CN106291058A (en) | 2016-08-15 | 2016-08-15 | The counter electromotive force measurement apparatus of a kind of motor and method |
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| CN106997025A (en) * | 2017-05-23 | 2017-08-01 | 核工业理化工程研究院 | The measurement apparatus of counter electromotive force of motor |
| CN107340472A (en) * | 2017-06-30 | 2017-11-10 | 杭州华橙网络科技有限公司 | A kind of detection means and method of stepper motor motion state |
| WO2018214797A1 (en) * | 2017-05-24 | 2018-11-29 | 杭州三花研究院有限公司 | Control system and control method |
| CN108957322A (en) * | 2018-08-24 | 2018-12-07 | 佛山市顺德区金泰德胜电机有限公司 | The measurement method of magneto counter electromotive force and used measuring device |
| CN109001629A (en) * | 2018-07-05 | 2018-12-14 | 青岛艾普智能仪器有限公司 | A kind of counter electromotive force test method of motor |
| CN109470313A (en) * | 2018-12-19 | 2019-03-15 | 珠海市精实测控技术有限公司 | A kind of automatic radius detection machine |
| CN110275107A (en) * | 2018-03-14 | 2019-09-24 | 上海鸣志电器股份有限公司 | A kind of test method of motor location torque |
| CN110488038A (en) * | 2019-08-13 | 2019-11-22 | 博玮科技(北京)有限公司 | A kind of rotary anode bulb rotor speed detection method and device |
| CN111022307A (en) * | 2019-12-16 | 2020-04-17 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor control method, compressor controller and air conditioning unit |
| CN113125952A (en) * | 2019-12-31 | 2021-07-16 | 广州先导自控专用设备有限公司 | Method for testing back electromotive force of permanent magnet rotor motor |
| CN113281651A (en) * | 2021-06-02 | 2021-08-20 | 杭州长牛科技有限公司 | Method for rapidly measuring back electromotive force coefficient of synchronous traction machine |
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| CN106997025A (en) * | 2017-05-23 | 2017-08-01 | 核工业理化工程研究院 | The measurement apparatus of counter electromotive force of motor |
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| CN107340472A (en) * | 2017-06-30 | 2017-11-10 | 杭州华橙网络科技有限公司 | A kind of detection means and method of stepper motor motion state |
| CN107340472B (en) * | 2017-06-30 | 2019-09-17 | 杭州华橙网络科技有限公司 | A kind of detection device and method of stepper motor motion state |
| CN110275107A (en) * | 2018-03-14 | 2019-09-24 | 上海鸣志电器股份有限公司 | A kind of test method of motor location torque |
| CN109001629A (en) * | 2018-07-05 | 2018-12-14 | 青岛艾普智能仪器有限公司 | A kind of counter electromotive force test method of motor |
| CN109001629B (en) * | 2018-07-05 | 2020-10-27 | 青岛艾普智能仪器有限公司 | Counter electromotive force testing method of motor |
| CN108957322B (en) * | 2018-08-24 | 2021-08-20 | 佛山市顺德区金泰德胜电机有限公司 | Method for measuring back electromotive force of permanent magnet motor and measuring device used by method |
| CN108957322A (en) * | 2018-08-24 | 2018-12-07 | 佛山市顺德区金泰德胜电机有限公司 | The measurement method of magneto counter electromotive force and used measuring device |
| CN109470313A (en) * | 2018-12-19 | 2019-03-15 | 珠海市精实测控技术有限公司 | A kind of automatic radius detection machine |
| CN110488038A (en) * | 2019-08-13 | 2019-11-22 | 博玮科技(北京)有限公司 | A kind of rotary anode bulb rotor speed detection method and device |
| CN111022307A (en) * | 2019-12-16 | 2020-04-17 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor control method, compressor controller and air conditioning unit |
| CN113125952A (en) * | 2019-12-31 | 2021-07-16 | 广州先导自控专用设备有限公司 | Method for testing back electromotive force of permanent magnet rotor motor |
| CN113281651A (en) * | 2021-06-02 | 2021-08-20 | 杭州长牛科技有限公司 | Method for rapidly measuring back electromotive force coefficient of synchronous traction machine |
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