CN103248316A - Method for controlling motor through multiple-frequency superposition - Google Patents
Method for controlling motor through multiple-frequency superposition Download PDFInfo
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- CN103248316A CN103248316A CN2012100296853A CN201210029685A CN103248316A CN 103248316 A CN103248316 A CN 103248316A CN 2012100296853 A CN2012100296853 A CN 2012100296853A CN 201210029685 A CN201210029685 A CN 201210029685A CN 103248316 A CN103248316 A CN 103248316A
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Abstract
The embodiment of the invention provides a control method for controlling a motor, which comprises the following steps: different sinusoidal waves of a plurality of frequencies are determined; according to the current moment, a three-phase instantaneous value of each sinusoidal wave is determined respectively; and instantaneous values of a plurality of sinusoidal waves of each phase are superposed and output. The control method for controlling the motor, provided by the embodiment of the invention, can output a wave shape through the superposition of multiple frequency sinusoidal waves.
Description
Technical field
The present invention relates to motor technology, particularly relate to the electric current that produces the multi-frequency stack and be used for the control motor.
Background technology
At present, frequency converter is adjusted motor speed to the frequency control of motor by changing supply frequency.The mode of Frequency Converter Control motor variable-frequency speed-regulating mainly contains PWM and SVPWM.
The full name of PWM is Pulse Width Modulation (pulse width modulation), and it is the output voltage that recently changes equivalence by the duty that changes the output square wave.Be widely used for the control of electric machine speed regulation and valve, just be to use this mode such as our present electric vehicle motor speed governing.
SPWM (Sinusoidal SPWM) has changed the modulating pulse mode on the basis of PWM exactly, and the pulse width time duty ratio is pressed the sine gauge rate and arranged, and output waveform can be accomplished sinewave output through suitable filtering like this.
SVPWM is the abbreviation of space vector pulse width modulation (Space Vector Pulse Width Modulation).The main thought of SVPWM is that the desirable magnetic linkage circle of three-phase symmetrical motor stator is normative reference when powering with three-phase symmetrical sine wave voltage, do suitable switching with the different switching modes of three-phase inverter, thereby form the PWM ripple, follow the trail of its accurate magnetic linkage circle with formed actual flux linkage vector.
But, current frequency control at alternating current machine, frequency converter output is generally standard sine wave, the stack that can not export the multi-frequency sine wave.
Summary of the invention
The object of the present invention is to provide a kind of Electric Machine Control control method of multi-frequency stack output.
The technical scheme that embodiments of the invention provide is:
A kind of Electric Machine Control control method comprises:
Determine the sine wave that a plurality of frequencies are different;
According to the current moment, determine each sinusoidal wave three-phase instantaneous value respectively, with instantaneous value stack and the output of a plurality of sine waves of each phase.
The waveform of the exportable a plurality of frequency sine-wave superimposed of Electric Machine Control control method that embodiments of the invention provide.
Description of drawings
Fig. 1 is the flow chart of the Electric Machine Control control method that provides of one embodiment of the invention;
Fig. 2 is under SPWM output situation, the method for the stack of two three-phase sine-waves of output;
Fig. 3 is under SVPWM output situation, the method for the stack of two three-phase sine-waves of output.
Embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1, Fig. 1 is the flow chart of the Electric Machine Control control method that provides of one embodiment of the invention.This method is used for alternating current machines such as asynchronous machine, synchronous machine, and the waveform of the exportable a plurality of frequency sine-wave superimposed of this method.This method can comprise:
Step S11, determine the sine wave that a plurality of frequencies are different;
In the present embodiment, need to suppose the stack of two three-phase sine-waves of output, namely a will export mutually
Wherein
The a that is called sine wave 1 exports mutually,
The a that is called sine wave 2 exports mutually.
Step S12, according to the current moment, determine each sinusoidal wave three-phase instantaneous value respectively, with instantaneous value stack and the output of a plurality of sine waves of each phase.
Under SPWM output situation, the sine wave of several different frequencies, at a time, respectively according to this moment should sine wave angle pass through look-up table, obtain this instantaneous value constantly of this sine respectively, multiply by this instantaneous value with amplitude respectively, just obtained should sine wave in this output constantly, several different frequency sinewave output summations have just obtained the output after the stack.
For example, under SPWM output situation, the method for the stack of two three-phase sine-waves of output as shown in Figure 1, t at a time calculates sinusoidal wave 1 a phase angle respectively
B phase angle
The phase angle
Sinusoidal wave 2 a phase angle
B phase angle
C phase angle
According to angle, calculate the sine value of this moment respectively by look-up table, sinusoidal wave 1 sine value multiply by a
1, then obtain sinusoidal wave 1 a phase instantaneous value
B phase instantaneous value
C phase instantaneous value
Sinusoidal wave 2 sine value multiply by a
2, then obtain sinusoidal wave 2 a phase instantaneous value
B phase instantaneous value
C phase instantaneous value
Under SVPWM output situation, the sine wave of several different frequencies, at a time, allow the d axle component of this sine wave correspondence be that 0, q axle component is-3/2 times of amplitude respectively, then, do according to this sine wave angle at this moment respectively and sentence the accuser to the punishment facing the person he falsely accused the mark conversion, obtain this sine wave in this output constantly, several different frequency sinewave output summations have just obtained the output after the stack.
For example, under SVPWM output situation, the method for the stack of two three-phase sine-waves of output makes v respectively as shown in Figure 2
1d=0, v
1q=-3/2a
1, v
2d=0, v
2q=-3/2a
2T at a time allows v respectively
1d, v
1qAccording to angle
Do SVPWM output and obtain sinusoidal wave 1 three-phase instantaneous value v
1a, v
1b, v
1cAllow v
2d, v
2qAccording to angle
Do SVPWM output and obtain sinusoidal wave 2 three-phase instantaneous value v
2a, v
2b, v
2c
The waveform of the exportable a plurality of frequency sine-wave superimposed of Electric Machine Control control method that embodiments of the invention provide.
Claims (2)
1. a multi-frequency superposes and is used for the method for Electric Machine Control, it is characterized in that, comprising:
Determine the sine wave that a plurality of frequencies are different;
According to the current moment, determine each sinusoidal wave three-phase instantaneous value respectively, with instantaneous value stack and the output of a plurality of sine waves of each phase.
2. multi-frequency according to claim 1 stack is used for the method for Electric Machine Control, it is characterized in that, and is described according to the current moment, determines each sinusoidal wave three-phase instantaneous value respectively, and instantaneous value stack and the output of a plurality of sine waves of each phase is comprised:
Under SPWM output situation, at current time, respectively according to this moment should sine wave angle, obtain each sinusoidal wave this instantaneous value constantly respectively by look-up table, multiply by this instantaneous value with amplitude respectively, just obtained each sine wave in this output valve constantly, with the output valve stack back output of several different frequency sine waves;
Under SVPWM output situation, at current time, allow each sinusoidal wave corresponding d axle component be 0 respectively, q axle component is-3/2 times of amplitude, do according to this sine wave angle at this moment respectively and sentence the accuser to the punishment facing the person he falsely accused the mark conversion, obtain each sine wave in this output constantly, with the output valve stack back output of the sine wave of different frequency.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210029685.3A CN103248316B (en) | 2012-02-10 | 2012-02-10 | Multi-frequency superposition is used for the method for Electric Machine Control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210029685.3A CN103248316B (en) | 2012-02-10 | 2012-02-10 | Multi-frequency superposition is used for the method for Electric Machine Control |
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| CN103248316A true CN103248316A (en) | 2013-08-14 |
| CN103248316B CN103248316B (en) | 2016-04-20 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001078466A (en) * | 1999-09-09 | 2001-03-23 | Mitsubishi Heavy Ind Ltd | Voltage-type pwm inverter and method for converting electric power |
| EP1394948A2 (en) * | 2002-07-30 | 2004-03-03 | Sanyo Denki Co., Ltd. | Synchronised sinusoidal signal controller |
| CN1574589A (en) * | 2003-05-23 | 2005-02-02 | 发那科株式会社 | Motor control unit |
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2012
- 2012-02-10 CN CN201210029685.3A patent/CN103248316B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001078466A (en) * | 1999-09-09 | 2001-03-23 | Mitsubishi Heavy Ind Ltd | Voltage-type pwm inverter and method for converting electric power |
| EP1394948A2 (en) * | 2002-07-30 | 2004-03-03 | Sanyo Denki Co., Ltd. | Synchronised sinusoidal signal controller |
| CN1574589A (en) * | 2003-05-23 | 2005-02-02 | 发那科株式会社 | Motor control unit |
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|---|---|
| CN103248316B (en) | 2016-04-20 |
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Effective date of registration: 20160810 Address after: 432000 No. 2, space Road, Tian Tian Industrial Park, Xiaogan Economic Development Zone, Hubei, China Patentee after: Dayu Electric Technology Co., Ltd. Address before: 430000, Hubei Wuhan New Technology Development Zone, Optics Valley Road, East Lake, No. 77, finance port, background service center, phase 12, building A3 Patentee before: Dayu Electrical Technology Co., Ltd. |