CN104836508A - Permanent magnet synchronous motor phase resistance parameter off-line identification method and system - Google Patents
Permanent magnet synchronous motor phase resistance parameter off-line identification method and system Download PDFInfo
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- CN104836508A CN104836508A CN201410049275.4A CN201410049275A CN104836508A CN 104836508 A CN104836508 A CN 104836508A CN 201410049275 A CN201410049275 A CN 201410049275A CN 104836508 A CN104836508 A CN 104836508A
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Abstract
The invention discloses a permanent magnet synchronous motor phase resistance parameter off-line identification method and a system. The method comprises controlling upper bridge arms of any two phases in an inverter to be disconnected and corresponding lower bridge arms to be conducted, controlling a lower bridge arm of a third phase in the inverter to be disconnected, inputting different-duty-ratio drive control signals to the upper bridge arm of the third phase in the inverter, detecting a third-phase equivalent DC voltage of a permanent magnet synchronous motor winding and a third-phase current of the permanent magnet synchronous motor winding, and calculating a permanent magnet synchronous motor phase resistance parameter according to the third-phase equivalent DC voltage and the third-phase current. According to the method, the inverter is controlled to be conducted and disconnected in a preset manner, and the different-duty-ratio drive control signals are input to the inverter, so the fact that the corresponding equivalent DC voltage is input to a permanent magnet synchronous motor is achieved; the permanent magnet synchronous motor phase resistance parameter is calculated according to the detected third-phase current of the permanent magnet synchronous motor; and operation is simple, the calculated amount is small, and the object of simplifying the motor phase resistance parameter identification method is achieved.
Description
Technical field
The present invention relates to machine field, particularly relate to a kind of permagnetic synchronous motor phase resistance parameter offline identification method and system.
Background technology
Permagnetic synchronous motor (Permanent Magnet Synchronous Motor, PMSM), so that its structure is simple, reliable, volume is little, loss is low, efficiency advantages of higher, is used widely in Digit Control Machine Tool, electric field.Permagnetic synchronous motor parameter has important impact for its application.For the identification of permagnetic synchronous motor phase resistance parameter, usually adopt instrument to detect, thus add manpower and cost; Wherein, universal frequency converter can also be adopted to carry out identification to permagnetic synchronous motor phase resistance parameter, the method needs rotor external lock or controls rotor turns when identification is initial to a fixed position, but, when permagnetic synchronous motor coupled load then cannot use, and discrimination method is too complicated.
Summary of the invention
Based on this, be necessary for the too complicated problem of existing permagnetic synchronous motor phase resistance parameter identification method, to provide a kind of permagnetic synchronous motor phase resistance parameter offline identification method and system, to reach the object simplifying discrimination method.
For realizing a kind of permagnetic synchronous motor phase resistance parameter offline identification method that the object of the invention provides, comprise the steps:
S100, in control inverter, the upper brachium pontis of any two-phase disconnects, corresponding lower brachium pontis conducting, and controls the lower brachium pontis disconnection of third phase in described inverter;
S200, in described inverter, the drive control signal of the upper brachium pontis input different duty of third phase, detects the third phase Equivalent DC voltage of permagnetic synchronous motor winding, and the third phase electric current of described permagnetic synchronous motor winding;
S300, according to described third phase Equivalent DC voltage and described third phase electric current, calculates permagnetic synchronous motor phase resistance parameter.
Wherein in an embodiment, described step S200 comprises the steps:
S210, in described inverter, the upper brachium pontis input duty cycle of third phase is D
1the first drive control signal, detect third phase first current i of described permagnetic synchronous motor winding
d1;
S220, in described inverter, the upper brachium pontis input duty cycle of third phase is D
2the second drive control signal, detect third phase second current i of described permagnetic synchronous motor winding
d2.
Wherein in an embodiment, described step S300 comprises the steps:
S310, according to formula:
calculate described permagnetic synchronous motor phase resistance parameter;
Wherein, u
dcfor DC bus-bar voltage, R
sfor described permagnetic synchronous motor phase resistance parameter.
Preferably, when inputting the drive control signal of different duty to the upper brachium pontis of third phase in described inverter in described step S200, detect the conduction voltage drop of the switch control device controlling phase current conducting in described inverter, and according to the conduction voltage drop of described switch control device, calculate the described third phase Equivalent DC voltage of described permagnetic synchronous motor winding.
More excellent, described step S200 also comprises the steps:
S220 ', detects the conduction voltage drop U of the device for power switching of conducting in described inverter
p;
S230 ', the upper brachium pontis controlling third phase in described inverter disconnects, and detects the conduction voltage drop U of the fly-wheel diode at the upper brachium pontis place of third phase in now described inverter
d;
S240 ', according to the conduction voltage drop U of described device for power switching
p, and the conduction voltage drop U of described fly-wheel diode
d, the described third phase Equivalent DC voltage calculating described permagnetic synchronous motor winding is: u
d=u
dcd-(U
p-U
d) D-(U
p+ U
d);
Wherein, D is the duty ratio of the described drive control signal of the upper brachium pontis input of third phase in described inverter, and the value of D is respectively D
1and D
2; u
dcfor DC bus-bar voltage.
Preferably, described drive control signal is the drive control signal of frequency higher than 1000HZ.
Also provide a kind of permagnetic synchronous motor phase resistance parameter off-line identification system for realizing the object of the invention, comprise pulse signal generator and inverter, the output of inverter is electrically connected with the input of permagnetic synchronous motor, also comprises controller, wherein:
The output of described pulse signal generator is electrically connected with the input of described inverter, for the drive control signal of the upper brachium pontis input different duty to third phase in described inverter;
Described controller comprises the first control module, first detection module, the second detection module and the first computing module, wherein:
Described first control module, disconnects for controlling the upper brachium pontis of any two-phase in described inverter, corresponding lower brachium pontis conducting, and the lower brachium pontis disconnection controlling third phase in described inverter;
Described first detection module, for detecting the third phase electric current of described permagnetic synchronous motor winding;
Described second detection module, for detecting the third phase Equivalent DC voltage of described permagnetic synchronous motor winding;
Described first computing module, for according to described third phase Equivalent DC voltage and described third phase electric current, calculates described permagnetic synchronous motor phase resistance parameter.
Wherein in an embodiment, described first control module comprises the first control unit and the second control unit; Described first detection module comprises the first detecting unit and the second detecting unit; Described first computing module comprises the first computing unit; Wherein:
Described first control unit is D for controlling described pulse signal generator to the upper brachium pontis input duty cycle of third phase in described inverter
1the first drive control signal;
Described second control unit is D for controlling described pulse signal generator to the upper brachium pontis input duty cycle of third phase in described inverter
2the second drive control signal;
Described first detecting unit, during for controlling described first drive control signal of described pulse signal generator input at described first control unit, detects third phase first current i of described permagnetic synchronous motor winding
d1;
Described second detecting unit, during for controlling described second drive control signal of described pulse signal generator input at described second control unit, detects third phase second current i of described permagnetic synchronous motor winding
d2;
Described first computing unit, for according to formula:
calculate described permagnetic synchronous motor phase resistance parameter;
Wherein, u
dcfor DC bus-bar voltage, R
sfor described permagnetic synchronous motor phase resistance parameter.
Wherein in an embodiment, described second detection module comprises the 4th detecting unit, the 5th detecting unit and the second computing unit, wherein:
Described 4th detecting unit, during for inputting the drive control signal of different duty to the upper brachium pontis of third phase in described inverter, detects the conduction voltage drop U of the device for power switching of conducting in described inverter
p;
Described 5th detecting unit, when the upper brachium pontis for controlling third phase in described inverter disconnects, detects the conduction voltage drop U of the fly-wheel diode at the upper brachium pontis place of third phase in described inverter
d;
Described second computing unit, for the conduction voltage drop U according to described device for power switching
p, and the conduction voltage drop U of described fly-wheel diode
d, the described third phase Equivalent DC voltage calculating described permagnetic synchronous motor winding is: u
d=u
dcd-(U
p-U
d) D-(U
p+ U
d);
Wherein, D is the duty ratio of the drive control signal of the upper brachium pontis input of third phase in described inverter, and the value of D is D
1and D
2; u
dcfor DC bus-bar voltage.
Permagnetic synchronous motor phase resistance parameter offline identification method provided by the invention and system, disconnected by the upper brachium pontis of two-phase any in control inverter, corresponding lower brachium pontis conducting, and in control inverter, the lower brachium pontis of third phase disconnects; In inverter, the drive control signal of the upper brachium pontis input different duty of third phase, detects the third phase Equivalent DC voltage of permagnetic synchronous motor winding, and the third phase electric current of permagnetic synchronous motor winding; According to the third phase electric current of third phase Equivalent DC voltage and permagnetic synchronous motor winding, calculate permagnetic synchronous motor phase resistance parameter.Its control inverter is with the mode conducting preset and disconnection, the drive control signal of different duty is inputted in inverter, realize inputting corresponding Equivalent DC voltage in permagnetic synchronous motor winding, by detecting the electric current of permagnetic synchronous motor winding under the effect of Equivalent DC voltage, permagnetic synchronous motor phase resistance parameter can be calculated, easy and simple to handle, amount of calculation is little, be suitable for the identification of the phase resistance parameter before high-performance permanent magnet synchronous motor startup, efficiently solve the problem that existing permagnetic synchronous motor phase resistance parameter identification method is too complicated.
Accompanying drawing explanation
Fig. 1 is permagnetic synchronous motor phase resistance parameter offline identification method one specific embodiment flow chart;
Fig. 2 is permagnetic synchronous motor phase resistance parameter offline identification method one specific embodiment inverter circuit diagram;
Fig. 3 is permagnetic synchronous motor phase resistance parameter offline identification method one specific embodiment equivalent circuit diagram;
Fig. 4 is the System's composition schematic diagram of permagnetic synchronous motor phase resistance parameter off-line identification system one specific embodiment;
Fig. 5 is that permagnetic synchronous motor phase resistance parameter off-line identification system one specific embodiment middle controller forms schematic diagram.
Embodiment
For making technical solution of the present invention clearly, below in conjunction with drawings and the specific embodiments, the present invention is described in further details.
See Fig. 1, a kind of permagnetic synchronous motor phase resistance parameter offline identification method, comprises the steps:
S100, in control inverter, the upper brachium pontis of any two-phase disconnects, corresponding lower brachium pontis conducting, and in control inverter, the lower brachium pontis of third phase disconnects;
S200, in inverter, the drive control signal of the upper brachium pontis input different duty of third phase, detects the third phase Equivalent DC voltage of permagnetic synchronous motor winding, and the third phase electric current of permagnetic synchronous motor winding;
S300, according to third phase Equivalent DC voltage and third phase electric current, calculates permagnetic synchronous motor phase resistance parameter.
Permagnetic synchronous motor phase resistance parameter offline identification method provided by the invention is by the drive control signal to permagnetic synchronous motor winding input different duty, realize inputting corresponding Equivalent DC voltage to permagnetic synchronous motor winding, and detect the electric current of permagnetic synchronous motor winding under the effect of corresponding Equivalent DC voltage, according to Equivalent DC voltage and the electric current of permagnetic synchronous motor winding, calculate permagnetic synchronous motor phase resistance parameter, easy and simple to handle, amount of calculation is little, effectively solve the problem that existing permagnetic synchronous motor phase resistance parameter offline identification method is too complicated.
Preferably; drive control signal is the drive control signal of frequency higher than 1000HZ; by to the drive control signal of permagnetic synchronous motor winding incoming frequency higher than 1000HZ; high pressure effectively can be avoided directly to be loaded into phenomenon permagnetic synchronous motor winding causing damaging motor, protect the safety of permagnetic synchronous motor.
As permagnetic synchronous motor phase resistance parameter identification method one specific embodiment of the present invention, step S200 comprises the steps:
S210, in inverter, the upper brachium pontis input duty cycle of third phase is D
1the first drive control signal, detect third phase first current i of permagnetic synchronous motor winding
d1;
S220, in inverter, the upper brachium pontis input duty cycle of third phase is D
2the second drive control signal, detect third phase second current i of permagnetic synchronous motor winding
d2.
Step S300 comprises the steps:
S310, according to formula:
calculate permagnetic synchronous motor phase resistance parameter;
Wherein, u
dcfor DC bus-bar voltage, R
sfor permagnetic synchronous motor phase resistance parameter.
See Fig. 2 and Fig. 3, in control inverter, the upper brachium pontis of any two-phase disconnects, and corresponding lower brachium pontis conducting, in control inverter, the lower brachium pontis of third phase disconnects simultaneously, and in inverter, the upper brachium pontis of third phase passes to duty ratio is D
1the first drive control signal time, be just equivalent to the Equivalent DC voltage u that have input in permagnetic synchronous motor winding after carrier wave
d1=u
dcd
1, wherein, u
dcfor DC bus-bar voltage; Owing to there are six device for power switching and six fly-wheel diodes in inverter, and the conduction voltage drop of each device for power switching and fly-wheel diode is not quite similar, therefore, in control inverter, the upper brachium pontis of V phase and W phase disconnects (namely device for power switching Sb and device for power switching Sc disconnects), corresponding lower brachium pontis conducting (i.e. device for power switching Sb ' and device for power switching Sc ' conducting), in control inverter, the lower brachium pontis of U phase disconnects (namely device for power switching Sa ' disconnects) simultaneously, and it is D that the upper brachium pontis (i.e. device for power switching Sa) to U phase passes to duty ratio
1the first drive control signal, as shown in Figure 3, according to the equivalent electric circuit of Fig. 3, the identification result that can obtain permagnetic synchronous motor phase resistance parameter is the equivalent circuit diagram of now permagnetic synchronous motor phase resistance parameter off-line identification system:
Wherein, i
dfor third phase electric current (i.e. U phase current);
In like manner, in control inverter, the upper brachium pontis of V phase and W phase disconnects (namely device for power switching Sb and device for power switching Sc disconnects), corresponding lower brachium pontis conducting (i.e. device for power switching Sb ' and device for power switching Sc ' conducting), in control inverter, the lower brachium pontis of U phase disconnects (namely device for power switching Sa ' disconnects) simultaneously, and it is D that the upper brachium pontis (i.e. device for power switching Sa) to U phase passes to duty ratio
2the second drive control signal time, the identification result obtaining permagnetic synchronous motor phase resistance parameter is:
For making the identification result of permagnetic synchronous motor phase resistance parameter more accurate, according to formula:
calculate permagnetic synchronous motor phase resistance parameter R
s, easy and simple to handle, amount of calculation is little, reaches the object simplifying permagnetic synchronous motor phase resistance parameter.
Preferably, as another specific embodiment of permagnetic synchronous motor phase resistance parameter offline identification method of the present invention, when inputting the drive control signal of different duty to the upper brachium pontis of third phase in inverter in step S200, detect the conduction voltage drop controlling the switch control device of phase current conducting in inverter, and according to the conduction voltage drop of switch control device, calculate the third phase Equivalent DC voltage of permagnetic synchronous motor winding;
, it should be noted that, the switch control device controlling phase current conducting in inverter is device for power switching and fly-wheel diode herein; When detecting the third phase Equivalent DC voltage of permagnetic synchronous motor winding, by detecting the conduction voltage drop controlling the switch control device of phase current conducting in inverter, make identification result more accurate.
As a kind of embodiment of permagnetic synchronous motor phase resistance parameter offline identification method of the present invention, step S200 also comprises the steps:
S220 ', detects the conduction voltage drop U of the device for power switching of conducting in inverter
p;
S230 ', in control inverter, the upper brachium pontis of third phase disconnects, and detects the conduction voltage drop U of the fly-wheel diode at the upper brachium pontis place of third phase in now inverter
d;
S240 ', according to the conduction voltage drop U of device for power switching
p, and the conduction voltage drop U of fly-wheel diode
d, the third phase Equivalent DC voltage calculating permagnetic synchronous motor winding is: u
d=u
dcd-(U
p-U
d) D-(U
p+ U
d);
Wherein, D is the duty ratio of the drive control signal of upper brachium pontis input to third phase in inverter, and the value of D is respectively D
1and D
2; u
dcfor DC bus-bar voltage.
Namely, when inputting the first drive control signal to the upper brachium pontis of third phase in inverter, the value of D is D
1, the third phase Equivalent DC voltage of corresponding permagnetic synchronous motor winding is: u
d1=u
dcd
1-(U
p-U
d) D
1-(U
p+ U
d);
When inputting the second drive control signal to the upper brachium pontis of third phase in inverter, the value of D is D
2, the third phase Equivalent DC voltage of corresponding permagnetic synchronous motor winding is: u
d2=u
dcd
2-(U
p-U
d) D
2-(U
p+ U
d).
See Fig. 2, in control inverter, the upper brachium pontis of V phase and W phase disconnects (namely device for power switching Sb and device for power switching Sc disconnects), corresponding lower brachium pontis conducting (i.e. device for power switching Sb ' and device for power switching Sc ' conducting), in control inverter, the lower brachium pontis of U phase disconnects (namely device for power switching Sa ' disconnects) simultaneously, when upper brachium pontis (i.e. device for power switching Sa) to U phase passes to drive control signal, electric current passes through u successively
dc, Sa, permagnetic synchronous motor, Sb ' and Sc ', by detecting the conduction voltage drop U of the device for power switching (i.e. device for power switching Sb ', device for power switching Sc ' and device for power switching Sa) of conducting in inverter
p, the voltage obtaining the reality of permagnetic synchronous motor winding is u
dc-2U
p; Then, control device for power switching Sa and disconnect, now electric current is successively by sustained diode a ', permagnetic synchronous motor, Sb ' and Sc ', by detecting the conduction voltage drop U of sustained diode a '
d, the voltage obtaining the reality of now permagnetic synchronous motor winding is-U
p-U
d, according to the virtual voltage of the permagnetic synchronous motor winding that twice obtains, the third phase Equivalent DC voltage obtaining permagnetic synchronous motor winding is: u
d=u
dcd-(U
p-U
d) D-(U
p+ U
d);
According to above-mentioned principle, in control inverter, the upper brachium pontis of V phase and W phase disconnects (namely device for power switching Sb and device for power switching Sc disconnects), corresponding lower brachium pontis conducting (i.e. device for power switching Sb ' and device for power switching Sc ' conducting), in control inverter, the lower brachium pontis of U phase disconnects (namely device for power switching Sa ' disconnects) simultaneously; First, passing to duty ratio to the upper brachium pontis (i.e. device for power switching Sa) of U phase is D
1the first drive control signal, now, the third phase Equivalent DC voltage of permagnetic synchronous motor winding is u
d=u
d1=u
dcd
1-(U
p-U
d) D
1-(U
p+ U
d), third phase first current i of permagnetic synchronous motor winding detected
d1; Then, again passing to duty ratio to the upper brachium pontis (i.e. device for power switching Sa) of U phase is D
2the second drive control signal, the third phase Equivalent DC voltage of permagnetic synchronous motor winding is u
d=u
d2=u
dcd
2-(U
p-U
d) D
2-(U
p+ U
d), third phase second current i of permagnetic synchronous motor winding detected
d2; Now, permagnetic synchronous motor phase resistance
Owing to having carried out " in control inverter, the upper brachium pontis of any two-phase disconnects; corresponding lower brachium pontis conducting; in control inverter, the lower brachium pontis of third phase disconnects; the upper brachium pontis of third phase passes to the drive control signal of different duty in inverter " such process in the specific embodiment that provides at permagnetic synchronous motor phase resistance parameter identification method of the present invention simultaneously, make the conduction voltage drop U of device for power switching in side circuit
pwith the conduction voltage drop U of fly-wheel diode
ddiffer very little, and the duty ratio of the first drive control signal inputted and the second drive control signal is all less, therefore, to formula
Simplify, obtain permagnetic synchronous motor phase resistance
identification permagnetic synchronous motor phase resistance parameter is got final product according to this formula, it makes identification result more simultaneously, simplify the identification process of permagnetic synchronous motor phase resistance parameter, efficiently solve the problem that existing permagnetic synchronous motor phase resistance parameter identification process is too complicated.
See Fig. 4, accordingly, based on same inventive concept, for realizing above-mentioned permagnetic synchronous motor phase resistance parameter identification method, present invention also offers a kind of permagnetic synchronous motor phase resistance parameter identification system, comprise pulse signal generator 410 and inverter 420, the output of inverter 420 is electrically connected with the input of permagnetic synchronous motor 430, also comprise controller 440, wherein:
The output of pulse signal generator 410 is electrically connected with the input of inverter 420, for the drive control signal of the upper brachium pontis input different duty to third phase in inverter 420;
Controller 440 comprises the first control module 441, first detection module 442, second detection module 443 and the first computing module 444, wherein:
First control module 441, the upper brachium pontis for two-phase any in control inverter 420 disconnects, corresponding lower brachium pontis conducting, and in control inverter 420, the lower brachium pontis of third phase disconnects;
First detection module 442, for detecting the third phase electric current of permagnetic synchronous motor 430 winding;
Second detection module 443, for detecting the third phase Equivalent DC voltage of permagnetic synchronous motor 430 winding;
First computing module 444, for the third phase electric current according to third phase Equivalent DC voltage and permagnetic synchronous motor 430 winding, calculates permagnetic synchronous motor 430 phase resistance parameter.
See Fig. 5, wherein in a specific embodiment, the first control module 441 comprises the first control unit 4410 and the second control unit 4411; First detection module 442 comprises the first detecting unit 4420 and the second detecting unit 4421; First computing module 444 comprises the first computing unit 4440; Wherein:
First control unit 4410 is D for control wave generator 410 to the upper brachium pontis input duty cycle of third phase in inverter 420
1the first drive control signal;
Second control unit 4411 is D for control wave generator 410 to the upper brachium pontis input duty cycle of third phase in inverter 420
2the second drive control signal;
First detecting unit 4420, for when the first control unit 4410 control wave generator 410 inputs the first drive control signal, detects third phase first current i of permagnetic synchronous motor 430 winding
d1;
Second detecting unit 4421, for when the second control unit 4411 control wave generator 410 inputs the second drive control signal, detects third phase second current i of permagnetic synchronous motor 430 winding
d2;
First computing unit 4440, for according to formula:
calculate permagnetic synchronous motor 430 phase resistance parameter;
Wherein, u
dcfor DC bus-bar voltage, R
sfor permagnetic synchronous motor phase resistance parameter.
As a kind of embodiment of permagnetic synchronous motor phase resistance parameter off-line identification system of the present invention, the second detection module 443 comprises the 4th detecting unit 4430, the 5th detecting unit 4431 and the second computing unit 4432, wherein:
4th detecting unit 4430, during for inputting the drive control signal of different duty to the upper brachium pontis of third phase in inverter 420, detects the conduction voltage drop U of the device for power switching of conducting in inverter 420
p;
5th detecting unit 4431, when the upper brachium pontis for third phase in control inverter 420 disconnects, detects the conduction voltage drop U of the fly-wheel diode at the upper brachium pontis place of third phase in inverter 420
d;
Second computing unit 4432, for the conduction voltage drop U according to device for power switching
p, and the conduction voltage drop U of fly-wheel diode
d, the third phase Equivalent DC voltage calculating permagnetic synchronous motor 430 winding is: u
d=u
dcd-(U
p-U
d) D-(U
p+ U
d);
Wherein, D is the duty ratio of the drive control signal of the upper brachium pontis input of third phase in inverter 420, and the value of D is D
1and D
2; u
dcfor DC bus-bar voltage.
Permagnetic synchronous motor phase resistance parameter identification method provided by the invention and system, before running at permagnetic synchronous motor, in control inverter, six device for power switching are with the mode conducting preset and disconnection, and in inverter, the drive control signal of different duty is passed to by pulse signal generator, realize passing to corresponding Equivalent DC voltage in permagnetic synchronous motor winding, and the corresponding current response detected on permagnetic synchronous motor winding is to calculate permagnetic synchronous motor phase resistance parameter, operating system is simple, be easy to realize, effectively solve the complexity problem of existing permagnetic synchronous motor phase resistance parameter identification system.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (9)
1. a permagnetic synchronous motor phase resistance parameter offline identification method, is characterized in that, comprises the steps:
S100, in control inverter, the upper brachium pontis of any two-phase disconnects, corresponding lower brachium pontis conducting, and controls the lower brachium pontis disconnection of third phase in described inverter;
S200, in described inverter, the drive control signal of the upper brachium pontis input different duty of third phase, detects the third phase Equivalent DC voltage of permagnetic synchronous motor winding, and the third phase electric current of described permagnetic synchronous motor winding;
S300, according to described third phase Equivalent DC voltage and described third phase electric current, calculates permagnetic synchronous motor phase resistance parameter.
2. permagnetic synchronous motor phase resistance parameter offline identification method according to claim 1, it is characterized in that, described step S200 comprises the steps:
S210, in described inverter, the upper brachium pontis input duty cycle of third phase is D
1the first drive control signal, detect third phase first current i of described permagnetic synchronous motor winding
d1;
S220, in described inverter, the upper brachium pontis input duty cycle of third phase is D
2the second drive control signal, detect third phase second current i of described permagnetic synchronous motor winding
d2.
3. permagnetic synchronous motor phase resistance parameter offline identification method according to claim 2, it is characterized in that, described step S300 comprises the steps:
S310, according to formula:
calculate described permagnetic synchronous motor phase resistance parameter;
Wherein, u
dcfor DC bus-bar voltage, R
sfor described permagnetic synchronous motor phase resistance parameter.
4. the permagnetic synchronous motor phase resistance parameter offline identification method according to any one of claims 1 to 3, it is characterized in that, when inputting the drive control signal of different duty to the upper brachium pontis of third phase in described inverter in described step S200, detect the conduction voltage drop of the switch control device controlling phase current conducting in described inverter, and according to the conduction voltage drop of described switch control device, calculate the described third phase Equivalent DC voltage of described permagnetic synchronous motor winding.
5. permagnetic synchronous motor phase resistance parameter offline identification method according to claim 4, it is characterized in that, described step S200 also comprises the steps:
S220 ', detects the conduction voltage drop U of the device for power switching of conducting in described inverter
p;
S230 ', the upper brachium pontis controlling third phase in described inverter disconnects, and detects the conduction voltage drop U of the fly-wheel diode at the upper brachium pontis place of third phase in now described inverter
d;
S240 ', according to the conduction voltage drop U of described device for power switching
p, and the conduction voltage drop U of described fly-wheel diode
d, the described third phase Equivalent DC voltage calculating described permagnetic synchronous motor winding is: u
d=u
dcd-(U
p-U
d) D-(U
p+ U
d);
Wherein, D is the duty ratio of the described drive control signal of the upper brachium pontis input of third phase in described inverter, and the value of D is respectively D
1and D
2; u
dcfor DC bus-bar voltage.
6. permagnetic synchronous motor phase resistance parameter offline identification method according to claim 5, is characterized in that, described drive control signal is the drive control signal of frequency higher than 1000HZ.
7. a permagnetic synchronous motor phase resistance parameter off-line identification system, comprises pulse signal generator and inverter, and the output of inverter is electrically connected with the input of permagnetic synchronous motor, it is characterized in that, also comprises controller, wherein:
The output of described pulse signal generator is electrically connected with the input of described inverter, for the drive control signal of the upper brachium pontis input different duty to third phase in described inverter;
Described controller comprises the first control module, first detection module, the second detection module and the first computing module, wherein:
Described first control module, disconnects for controlling the upper brachium pontis of any two-phase in described inverter, corresponding lower brachium pontis conducting, and the lower brachium pontis disconnection controlling third phase in described inverter;
Described first detection module, for detecting the third phase electric current of described permagnetic synchronous motor winding;
Described second detection module, for detecting the third phase Equivalent DC voltage of described permagnetic synchronous motor winding;
Described first computing module, for according to described third phase Equivalent DC voltage and described third phase electric current, calculates permagnetic synchronous motor phase resistance parameter.
8. permagnetic synchronous motor phase resistance parameter off-line identification system according to claim 7, it is characterized in that, described first control module comprises the first control unit and the second control unit;
Described first detection module comprises the first detecting unit and the second detecting unit;
Described first computing module comprises the first computing unit; Wherein:
Described first control unit is D for controlling described pulse signal generator to the upper brachium pontis input duty cycle of third phase in described inverter
1the first drive control signal;
Described second control unit is D for controlling described pulse signal generator to the upper brachium pontis input duty cycle of third phase in described inverter
2the second drive control signal;
Described first detecting unit, during for controlling described first drive control signal of described pulse signal generator input at described first control unit, detects third phase first current i of described permagnetic synchronous motor winding
d1;
Described second detecting unit, during for controlling described second drive control signal of described pulse signal generator input at described second control unit, detects third phase second current i of described permagnetic synchronous motor winding
d2;
Described first computing unit, for according to formula:
calculate described permagnetic synchronous motor phase resistance parameter;
Wherein, u
dcfor DC bus-bar voltage, R
sfor described permagnetic synchronous motor phase resistance parameter.
9. permagnetic synchronous motor phase resistance parameter off-line identification system according to claim 8, it is characterized in that, described second detection module comprises the 4th detecting unit, the 5th detecting unit and the second computing unit, wherein:
Described 4th detecting unit, during for inputting the drive control signal of different duty to the upper brachium pontis of third phase in described inverter, detects the conduction voltage drop U of the device for power switching of conducting in described inverter
p;
Described 5th detecting unit, when the upper brachium pontis for controlling third phase in described inverter disconnects, detects the conduction voltage drop U of the fly-wheel diode at the upper brachium pontis place of third phase in described inverter
d;
Described second computing unit, for the conduction voltage drop U according to described device for power switching
p, and the conduction voltage drop U of described fly-wheel diode
d, the described third phase Equivalent DC voltage calculating described permagnetic synchronous motor winding is: u
d=u
dcd-(U
p-U
d) D-(U
p+ U
d);
Wherein, D is the duty ratio of the drive control signal of the upper brachium pontis input of third phase in described inverter, and the value of D is D
1and D
2; u
dcfor DC bus-bar voltage.
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| CN106685293A (en) * | 2016-12-19 | 2017-05-17 | 四川长虹电器股份有限公司 | Method for offline identification of motor phase resistance |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106685293A (en) * | 2016-12-19 | 2017-05-17 | 四川长虹电器股份有限公司 | Method for offline identification of motor phase resistance |
| CN109687701A (en) * | 2017-10-19 | 2019-04-26 | 华晨汽车集团控股有限公司 | A kind of identification of electric machine controller dead zone and compensation method |
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| CN110224648A (en) * | 2019-06-19 | 2019-09-10 | 南京奇智控制技术有限公司 | Permanent magnet synchronous motor parameter identification and method for controlling position-less sensor and system |
| CN110224648B (en) * | 2019-06-19 | 2020-11-24 | 南京奇智控制技术有限公司 | Permanent magnet synchronous motor parameter identification and position sensorless control method and system |
| CN110426559A (en) * | 2019-07-19 | 2019-11-08 | 深圳和而泰智能控制股份有限公司 | A kind of method, apparatus and equipment measuring electric motor resistance |
| CN110824252A (en) * | 2019-09-30 | 2020-02-21 | 东南大学 | Permanent magnet synchronous motor stator resistance off-line measuring method based on inverter nonlinear dead time compensation |
| CN110824252B (en) * | 2019-09-30 | 2021-12-14 | 东南大学溧阳研究院 | Permanent magnet synchronous motor stator resistance measurement method based on dead time compensation |
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