CN205725555U - The efficiency improving device of permagnetic synchronous motor - Google Patents
The efficiency improving device of permagnetic synchronous motor Download PDFInfo
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- CN205725555U CN205725555U CN201620396523.7U CN201620396523U CN205725555U CN 205725555 U CN205725555 U CN 205725555U CN 201620396523 U CN201620396523 U CN 201620396523U CN 205725555 U CN205725555 U CN 205725555U
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Abstract
The utility model discloses the efficiency improving device of a kind of permagnetic synchronous motor, this device includes: rotational speed governor, microprocessor, measuring cell, semiconductor switch, inverter, motor and load；Wherein, microprocessor is connected with rotational speed governor, measuring cell, semiconductor switch, inverter respectively；Semiconductor switch is connected with measuring cell, inverter respectively；Motor is connected with inverter, load respectively.Use technical solutions of the utility model without motor detail parameters, motor can be realized and reach optimum efficiency, it is to avoid because environmental factors causes control mistake.
Description
Technical field
This utility model relates to technical field of electronic equipment, and the efficiency particularly relating to a kind of permagnetic synchronous motor carries
Rise device.
Background technology
Efficient and the simple motor of hardware configuration is following development trend, according to electric efficiency formula
E=Pout/PinUnderstanding, under constant load, the unique variable in formula is input power Pin, and input power
Depend on input voltage and input current.Generally, input voltage is basicly stable, therefore inputs
Electric current is unique variable needing and controlling.It addition, the size of motor internal torque depends on magnetic flux and rotor
Phase angle between electric current.If Three-phase electronic stator flux and stator current are parallel vectors, then motor
The moment obtained is 0, if both directions are in suitable angle, then can produce maximum moment.
Prior art obtains suitable phase angle by controlling program, needs the closed loop control system of a band feedback
System, to show position of magnetic pole.This closed-loop control system typically requires three sensors of installation in motor and comes
Perform, such as encoder, optical delta device or inductance type transducer.It addition, also there is use sensorless strategy
Mode realizes, and it mainly reaches to control purpose by the induction electromotive force of measurement motor.
But use sensorless strategy mode to need to know the rated voltage of motor, power, specified electricity in advance
Numerous parameters such as stream, rated frequency, motor number of pole-pairs, and whether can reach minimum according to electric current when measuring
Judge whether to reach optimum efficiency.This means for out of phase or phase angle, the most higher
Current absolute value can be only achieved same optimum state, but owing to this measurement electric current can be phase current, electricity
In the electric current of machine total current, the electric current of resistor or semiconductor switch, any one, so can cause certain
Part efficiency is optimal, and the efficiency of some part reduces.It addition, under sensorless strategy mode, motor is detailed
Thin parameter is likely to be due to the change of environment (temperature or humidity) and changes, thus cause magnetic field estimate mistake and
The mistake of specified control desired value.
Summary of the invention
Technical problem to be solved in the utility model is to provide the improved efficiency dress of a kind of permagnetic synchronous motor
Put, it is not necessary to motor detail parameters, motor can be realized and reach optimum efficiency, it is to avoid because environmental factors causes control
Mistake processed.
For solving above technical problem, this utility model embodiment provides the efficiency of a kind of permagnetic synchronous motor to carry
Rise device, including: rotational speed governor, microprocessor, measuring cell, semiconductor switch, inverter, electricity
Machine and load；
Wherein, described microprocessor respectively with described rotational speed governor, described measuring cell, described quasiconductor
Switch, described inverter connect；
Described semiconductor switch is connected with described measuring cell, described inverter respectively；
Described motor is connected with described inverter, described load respectively.
Further, described microprocessor includes:
Field orientation assembly (42), the first sum unit (72), first integrator (74), first sensor
(76), motor permutator (78), the second sum unit (80), signaling switch (82), second integral
Device (84), multiplexer (86), the second sensor (88), decision package (90), differential element (92)
With third integral device (94)；
Wherein, the voltage input end (60) of described field orientation assembly (42) and described motor permutator
(78) outfan connects, β angle signal input (62) of described field orientation assembly (42) and institute
The outfan stating third integral device (94) connects；
The input of described first integrator (74) is connected with the outfan of described first sum unit (72),
The outfan of described first integrator (74) respectively with negative input, the institute of the first sum unit (72)
State the input of first sensor (76), the input of described second sensor (88), third integral device
(94) input connects；
The outfan of described first sensor (76) is defeated with the first of described motor permutator (78) respectively
Enter end, the positive input of described second sum unit (80) connects；
The outfan of described second sum unit (80) inputs with the second of described motor permutator (78)
End connects；First negative input of described second sum unit (80) and described signaling switch (82)
Outfan connects；Second negative input of described second sum unit (80) and described second integral device (84)
Outfan connect；
The first input end of described signaling switch (82) and 0 signal input part connect；Described signaling switch (82)
The second input and 1 signal input part connect；
The input of described second integral device (84) is connected with the outfan of described multiplexer (86)；
The first input end of described multiplexer (86) is connected with the outfan of described decision package (90)；Institute
The outfan of the second input and described second sensor (88) of stating multiplexer (86) is connected；
The input of described decision package (90) is connected with the outfan of described differential element (92).
Further, described microprocessor is connected with described measuring cell, particularly as follows:
Described measuring cell respectively with described field orientation assembly (42), the input of described differential element (92)
End connects.
Further, described microprocessor is connected with described rotational speed governor, particularly as follows:
Described rotational speed governor is connected with the positive input of described first sum unit (72).
Further, described microprocessor is connected with semiconductor switch, particularly as follows:
Described semiconductor switch is connected with described field orientation assembly (42).
Visible, the efficiency improving device of the permagnetic synchronous motor that this utility model embodiment provides, microprocessor
It is connected with rotational speed governor, measuring cell, semiconductor switch, inverter respectively.Microprocessor is according to measurement
The current signal of element input and the tach signal of rotational speed governor input, calculate in the case of efficiency optimization
Phase angle and working voltage, and to inverter output phase angle and working voltage, for inverter driving galvanic electricity
Machine works.Some special parameter of motor is needed to can be only achieved compared to the sensorless strategy mode of prior art
Controlling purpose, technical solutions of the utility model, without motor detail parameters, can sense voluntarily and obtain best effective
Rate point parameter, it is to avoid because environmental factors causes control mistake.
Accompanying drawing explanation
Fig. 1 is the knot of a kind of embodiment of the efficiency improving device of the permagnetic synchronous motor that this utility model provides
Structure schematic diagram；
Fig. 2 is the another kind of embodiment of the efficiency improving device of the permagnetic synchronous motor that this utility model provides
Attachment structure schematic diagram；
Fig. 3 is the principle assumption diagram of a kind of embodiment of the permagnetic synchronous motor that this utility model provides；
Fig. 4 is the stream of a kind of embodiment of the improved efficiency method of the permagnetic synchronous motor that this utility model provides
Journey schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the technical side in this utility model embodiment
Case is clearly and completely described.
See Fig. 1, be the structure of a kind of embodiment of the efficiency improving device of this utility model permagnetic synchronous motor
Schematic diagram.As it is shown in figure 1, the efficiency improving device of this permagnetic synchronous motor, including: rotational speed governor 70,
Microprocessor 95, measuring cell 56, semiconductor switch 52, inverter 43, motor 40 and load 48.
Wherein, microprocessor 95 respectively with rotational speed governor 70, measuring cell 56, semiconductor switch 52,
Inverter 43 connects.Semiconductor switch 52 is connected with measuring cell 56, inverter 43 respectively.Motor 40
It is connected with inverter 43, load 48 respectively.
In the present embodiment, microprocessor 95 is for the current signal according to measuring cell 56 input and rotating speed
The tach signal of controller 70 input, calculates the phase angle in the case of efficiency optimization and working voltage, and
Export phase angle and working voltage to inverter 43, drive motor 40 to work for inverter 43.
In the present embodiment, see the efficiency that Fig. 2, Fig. 2 are the permagnetic synchronous motors that this utility model provides to carry
Rise the attachment structure schematic diagram of the another kind of embodiment of device.As in figure 2 it is shown, this permagnetic synchronous motor is three
Phase permagnetic synchronous motor, the winding of three phase electric machine 40 is star winding 44, and motor is symbolistic describes permanent magnetism
Rotor 46, this rotor is the two poles of the earth rotor, can extend to 4,6,8,10 poles etc..When passing to sine
During electric current, PM rotor produces constant moment.Motor 40 drives load 48, and load 48 is blower fan, wind
Machine water pump is similar to a substantially constant load.The electric current of DC circuit is measured and takes by measuring cell 56
Sample, measuring cell 56 is made up of measurement resistor or current transformer.Alternating current power supply 54 is entered for whole device
Row power supply.
As in figure 2 it is shown, microprocessor 95 includes: field orientation assembly the 42, first sum unit 72,
One integrator 74, first sensor 76, motor permutator the 78, second sum unit 80, signaling switch
82, second integral device 84, multiplexer the 86, second sensor 88, decision package 90, differential element 92 and
Third integral device 94.
Wherein, the voltage input end 60 of field orientation assembly 42 is connected with the outfan of motor permutator 78,
The β angle signal input 62 of field orientation assembly 42 is connected with the outfan of third integral device 94.Magnetic field is fixed
A magnitude of voltage is accepted to the voltage input end 60 of assembly 42β angle signal input 62 receives β angle letter
Number, β angle determines the rotating speed of motor 40.Because motor 40 is synchronous motor, rotor position originally can be removed
Put induction apparatus, but owing to needs continuous print monitoring rotor 46 is the most still in operating, if owing to moment is the biggest
And block and turn, motor 40 is internal still needs to installation site sensor.
In the present embodiment, the input of first integrator 74 and the outfan of the first sum unit 72 connect,
The outfan of first integrator 74 respectively with negative input, the first sensor 76 of the first sum unit 72
Input, the input of the second sensor 88, third integral device 94 input connect.
In the present embodiment, microprocessor 95 is connected with rotational speed governor 70, particularly as follows: rotational speed governor
70 are connected with the positive input of the first sum unit 72.Rotational speed governor 70 is used for specifying field orientation group
The frequency of the rotating excitation field that part 42 and inverter 43 produce, to microcontroller 95 input speed signal.Rotating speed
Controller 70 outputs signal to the positive input of the first sum unit 72, and the first sum unit 72 produces one
The individual acceleration time, control the rotating speed time from 0 to n.First sum unit 72 outputs signals to first integral
Device 74.First integrator 74 produces a slope, and its output signal bearing as the first sum unit 72
To input.
In the present embodiment, the outfan of first sensor 76 is defeated with the first of motor permutator 78 respectively
Enter end, the positive input of the second sum unit 80 connects.The outfan of the second sum unit 80 and motor
Second input of permutator 78 connects.First negative input of the second sum unit 80 is opened with signal
Close the outfan connection of 82；Second negative input of the second sum unit 80 is defeated with second integral device 84
Go out end to connect.
Motor permutator 78 has first input end and two gears of the second input.When electric motor starting accelerates
Time or motor speed change time switch be switched to first input end.When motor enters the search mould of efficiency optimization
During formula, switch is switched to the second input.Motor speed signal n is given by first integrator 74, and output is extremely
First sensor 76, first sensor 76 produces parameter P of and velocity correlation.Parameter P is according to rotating speed
N real-time change and obtain, determine output voltage size, formula is:Voltage is along with the rising of rotating speed
And increase, under adjustment modes, voltage swingInputted to magnetic by motor permutator 78 (gear 1)
Field orientation assemblies 42, then export to inverter 43, thus operate in best efficiency point.And open in search pattern
Time dynamic, motor permutator 78 is switched to gear 2, and now voltage input end 60 connects the second sum unit
80, the second sum unit 80 calculates voltageSize after, output to voltage input end 60.
In the present embodiment, the first input end of signaling switch 82 and 0 signal input part connect, signaling switch
Second input of 82 and 1 signal input part connect.
In the present embodiment, the input that forward input is first sensor of the second sum unit 80, i.e. believe
Number n*P.When motor permutator 78 is switched to first input end, the signal 0 of signaling switch 82 is as negative
To input.When motor permutator 78 is switched to the second input, signal 1 conduct of signaling switch 82
Negative sense inputs.
In the present embodiment, the input of second integral device 84 is connected with the outfan of multiplexer 86.Second
The output signal of integrator 84 inputs as another negative sense of the second sum unit 80, can control voltage not
Disconnected decline.
In the present embodiment, the first input end of multiplexer 86 is connected with the outfan of decision package 90.Times
The outfan of the second input and the second sensor 88 that increase device 86 connects.The input of decision package 90 with
The outfan of differential element 92 connects.The output signal of multiplexer 86 as the input of integrator 84, this letter
Number it is used for producing voltageThe gradient reduced.In order to control voltageReduction degree, the second sensor 88
Producing rotating speed correlative factor P, as the input of multiplexer 86, rotating speed n is the input of the second sensor 88.
First sensor 76 and the second produced parameter P of sensor 88 are same parameter.Decision element 90 defeated
Go out the signal input signal as multiplexer 86, be more than or equal to according to its standard or less than or equal to carrying out decision-making.
The output signal of differential element 92 is as the input signal of decision element 90.
In the present embodiment, microprocessor 65 is connected with measuring cell 56, particularly as follows: measuring cell 56 points
It is not connected with the input of field orientation assembly 42, differential element 92.Differential element 92 is set up double
The difference of electric current.In other words, in search process, electric current I difference size is continually changing, until reaching
Little value.
In the present embodiment, rotating speed n is integrated by third integral device 94, and output angle signal beta is extremely
Field orientation assembly 42.
In the present embodiment, microprocessor 95 is connected with semiconductor switch 52, particularly as follows: semiconductor switch
52 are connected with field orientation assembly 42.
In the present embodiment, microprocessor 95 can be, but not limited to be eight bit microprocessors.
In the present embodiment, three PWM generator it are provided with in inverter 43, to produce three-phase current.
Three sinusoidal wave sensors produce three phase sine voltage.In detail as it is shown on figure 3, when motor 40 starts, inverse
Change device 43 produces an electric rotating and has a meeting, an audience, etc. well under one's control, thus produces an enough moment.When motor 40 runs inverse
The voltage becoming the rotating field that device 43 produces progressively weakens, thus reduces electric current, when electric current minimizes value,
Efficiency reaches optimal.In Fig. 3, the motor 40 of display has Three-phase electronic 202,204 and 206, and motor 40 has
P-m rotor 46, for quadrupole motor.Threephase stator 202,204 and 206 produces three phase sine electric current, by μ
C 95 produces a sinusoidal signal, entitled: sin t, sin (t+120 °), sin (t+240 °).Three-phase signal
Frequency-adjustable joint.Because frequency determines rotating speed, thus need not measure rotating speed.At comparator 272,274,
In 276, signal sin t, sin (t+120 °), sin (t+240 °) compare with triangle signal u 270 respectively.Three
The output of angle signal generator 268, as comparator 272, the reverse input of 274,276.Three phase sine
Electric current i204,202 and 206 together form three-phase system, produce a rotating excitation field and drive p-m rotor
46, run with speed.Owing to the magnetization of rotor 46 is sinusoidal, produce the moment of constant.Special
Other, it is not necessary to complicated and expensive turn-sensitive device, motor 40 operates in optimum efficiency.
In order to better illustrate operation principle of the present utility model and process step, seeing Fig. 4, Fig. 4 is this reality
Schematic flow sheet by a kind of embodiment of the improved efficiency method of the permagnetic synchronous motor of novel offer.The party
Method is that the efficiency improving device utilizing permagnetic synchronous motor of the present utility model realizes, the method include with
Lower step:
Step A: microprocessor passes through inverter AC motor stable operation under the first voltage and load, and
It is sampled measuring cell gathering, it is thus achieved that the first current amplitude；Wherein, the first voltage is default voltage.
Step B: microprocessor is by inverter AC motor stable operation under the second voltage and load and right
Measuring cell is sampled gathering, it is thus achieved that the second current amplitude；Wherein, the second voltage is less than the first voltage,
And first the difference of voltage and the second voltage be first threshold.
Step C: whether microprocessor judges the second current amplitude is less than the first current amplitude；If it is, hold
Row step D, otherwise, reduces the second voltage, and the difference before making the magnitude of voltage after reduction and reducing is the first threshold
Value, returns step B.
Step D: microprocessor keeps motor stable operation under the second voltage, and by the second voltage and second
Current amplitude is as best efficiency point parameter.
In the present embodiment, the first voltage, the second voltage, the first current amplitude and the second current amplitude all quilts
Storage is in memory.
As a kind of citing of the present embodiment, the method also includes step E: judge whether the value of load becomes
Change；The most then repeat step A to D, so that it is determined that new best efficiency point parameter；Otherwise, step is repeated
Rapid E.
Visible, the efficiency improving device of the permagnetic synchronous motor that this utility model embodiment provides, microprocessor
It is connected with rotational speed governor, measuring cell, semiconductor switch, inverter respectively.Microprocessor is according to measurement
The current signal of element input and the tach signal of rotational speed governor input, calculate in the case of efficiency optimization
Phase angle and working voltage, and to inverter output phase angle and working voltage, for inverter driving galvanic electricity
Machine works.Some special parameter of motor is needed to can be only achieved compared to the sensorless strategy mode of prior art
Controlling purpose, technical solutions of the utility model, without motor detail parameters, can sense voluntarily and obtain best effective
Rate point parameter, it is to avoid because environmental factors causes control mistake.
The above is preferred implementation of the present utility model, it is noted that general for the art
For logical technical staff, on the premise of without departing from this utility model principle, it is also possible to make some improvement and
Retouching, these improvements and modifications are also considered as protection domain of the present utility model.
Claims (5)
1. the efficiency improving device of a permagnetic synchronous motor, it is characterised in that including: rotational speed governor,
Microprocessor, measuring cell, semiconductor switch, inverter, motor and load；
Wherein, described microprocessor respectively with described rotational speed governor, described measuring cell, described quasiconductor
Switch, described inverter connect；
Described semiconductor switch is connected with described measuring cell, described inverter respectively；
Described motor is connected with described inverter, described load respectively.
The efficiency improving device of permagnetic synchronous motor the most according to claim 1, it is characterised in that institute
State microprocessor to include:
Field orientation assembly (42), the first sum unit (72), first integrator (74), first sensor
(76), motor permutator (78), the second sum unit (80), signaling switch (82), second integral
Device (84), multiplexer (86), the second sensor (88), decision package (90), differential element (92)
With third integral device (94)；
Wherein, the voltage input end (60) of described field orientation assembly (42) and described motor permutator
(78) outfan connects, β angle signal input (62) of described field orientation assembly (42) and institute
The outfan stating third integral device (94) connects；
The input of described first integrator (74) is connected with the outfan of described first sum unit (72),
The outfan of described first integrator (74) respectively with negative input, the institute of the first sum unit (72)
State the input of first sensor (76), the input of described second sensor (88), third integral device
(94) input connects；
The outfan of described first sensor (76) is defeated with the first of described motor permutator (78) respectively
Enter end, the positive input of described second sum unit (80) connects；
The outfan of described second sum unit (80) inputs with the second of described motor permutator (78)
End connects；First negative input of described second sum unit (80) and described signaling switch (82)
Outfan connects；Second negative input of described second sum unit (80) and described second integral device (84)
Outfan connect；
The first input end of described signaling switch (82) and 0 signal input part connect；Described signaling switch (82)
The second input and 1 signal input part connect；
The input of described second integral device (84) is connected with the outfan of described multiplexer (86)；
The first input end of described multiplexer (86) is connected with the outfan of described decision package (90)；Institute
The outfan of the second input and described second sensor (88) of stating multiplexer (86) is connected；
The input of described decision package (90) is connected with the outfan of described differential element (92).
The efficiency improving device of permagnetic synchronous motor the most according to claim 2, it is characterised in that institute
State microprocessor to be connected with described measuring cell, particularly as follows:
Described measuring cell respectively with described field orientation assembly (42), the input of described differential element (92)
End connects.
The efficiency improving device of permagnetic synchronous motor the most according to claim 2, it is characterised in that institute
State microprocessor to be connected with described rotational speed governor, particularly as follows:
Described rotational speed governor is connected with the positive input of described first sum unit (72).
The efficiency improving device of permagnetic synchronous motor the most according to claim 2, it is characterised in that institute
State microprocessor to be connected with semiconductor switch, particularly as follows:
Described semiconductor switch is connected with described field orientation assembly (42).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620396523.7U CN205725555U (en) | 2016-05-03 | 2016-05-03 | The efficiency improving device of permagnetic synchronous motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811852A (en) * | 2016-05-03 | 2016-07-27 | 广州智光节能有限公司 | Efficiency improvement device and method of permanent-magnet synchronous motor |
| CN106655950A (en) * | 2016-11-24 | 2017-05-10 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Voltage-adjustable motor control system |
-
2016
- 2016-05-03 CN CN201620396523.7U patent/CN205725555U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811852A (en) * | 2016-05-03 | 2016-07-27 | 广州智光节能有限公司 | Efficiency improvement device and method of permanent-magnet synchronous motor |
| CN105811852B (en) * | 2016-05-03 | 2018-12-25 | 广州智光节能有限公司 | The efficiency improving device and method of permanent magnet synchronous motor |
| CN106655950A (en) * | 2016-11-24 | 2017-05-10 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Voltage-adjustable motor control system |
| CN106655950B (en) * | 2016-11-24 | 2019-08-27 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of adjustable electric machine control system of voltage |
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