CN101320950A - Motor control method and device - Google Patents
Motor control method and device Download PDFInfo
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- CN101320950A CN101320950A CNA2007101088876A CN200710108887A CN101320950A CN 101320950 A CN101320950 A CN 101320950A CN A2007101088876 A CNA2007101088876 A CN A2007101088876A CN 200710108887 A CN200710108887 A CN 200710108887A CN 101320950 A CN101320950 A CN 101320950A
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Abstract
The invention relates to a motor control method and an apparatus thereof, including: first detecting the current feedback signal on the coil switching circuit of the motor when the motor is operating, then generating a separating signal, further comparing the current feedback signal with the separating signal and generating a new motor speed control signal to control the operation of the motor.
Description
Technical field
The present invention relates to a kind of motor control method and device thereof, particularly relate to a kind of motor rotary speed control signal of improving, to improve the control method and the device of motor running efficient.
Background technology
The technology of controlling motor now is ripe, favourablely already control the technology that motor is rotated motion with circuit, moreover, can also utilize this circuit to change the rotating speed of rotating speed, the restriction motor of motor, even the function etc. of other control motor arranged.
A kind of known controller for motor as described in Figure 1, this controller for motor 1 comprises that a motor drive circuit 10, a Hall detection components 12, a coil commutation circuit 14 and a pulse-width modulation produce circuit 16.The phase signal that Hall detection components 12 is produced when detecting motor running, wherein the phase place of a coil groups 20 running switchings in phase signal and the motor is identical; And motor drive circuit 10 is electrically connected on Hall detection components 12, after receiving phase signal from Hall detection components 12, can produce a motor rotary speed control signal, wherein the motor rotary speed control signal normally is made up of a plurality of rules and continuous square wave.Please refer to Fig. 2, be the waveform schematic diagram of motor rotary speed control signal 21 shown in the figure, wherein longitudinal axis A represents the amplitude of waveform, can be expressed as voltage at this, and transverse axis t is expressed as the time, usually motor drive circuit 10 is constituted by a specific integrated circuit (ASIC), and so specific integrated circuit has become that those skilled in the art are familiar with and handy specification product.In addition, coil commutation circuit 14 is generally two MOS switches and forms, after motor rotary speed control signal 21 that motor drive circuit 10 is produced inputs to coil commutation circuit 14, coil commutation circuit 14 can input to motor rotary speed control signal 21 in the coil groups 20 of motor in regular turn, make coil groups 20 switch current direction between two adjacent phase places, so that motor reaches the purpose of continuous running; In addition, pulse-width modulation produces circuit 16 can also be with the mode (PWM of motor rotary speed control signal 21 with pulse-width modulation, PulseWidth Modulation) is cut into the little square wave of a plurality of regular distribution, please refer to shown in Figure 2, after motor rotary speed control signal 21 is cut into a plurality of little square waves, can learn by equivalence principle, the amplitude of original motor rotary speed control signal 21 can be become less amplitude by equivalence, when the motor rotary speed control signal 21 of equivalence inputs to the coil groups 20 of motor, the rotating speed of motor is reduced.Because traditional motor driven mode all is closing or opening of control coil commutation circuit 14 in steady job cycle (duty cycle) mode, and then the rotating speed of control motor, and the current signal 22 that is presented under this running can be as shown in Figure 4, longitudinal axis A represents the amplitude of waveform among the figure, can be expressed as electric current at this, and transverse axis t is expressed as the time, as shown in the figure in the process of change poles, the current peak of P1 and P2 two-end-point is high, and the current peak of this two-end-point is exactly inductive component (motor coil group 60) energy storage and the effect of releasing the subject of knowledge and the object of knowledge generation in the process of energising, yet the current status and the efficient of the running of motor under this mode drives not are to be the best, represent promptly that as the P zone that is depression among the figure efficient of this motor running is compared to other area difference, therefore, if one of current status adjustment in the time of can be with motor running levels off to the state of direct current, at this moment, the running efficiency of motor will be optimization.
Summary of the invention
Therefore, the object of the present invention is to provide a motor control method and device thereof, control the rotating speed of motor, make motor can have better efficient in the running can produce a kind of new motor rotary speed control signal.
So, the invention provides a kind of motor control method, it mainly is to improve the motor rotary speed control signal, to promote motor running efficient, its step comprises: at first when a current detecting sample circuit detects motor running, current feedback signal on the one coil commutation circuit of this motor produces circuit by a separation signals again and produces a separation signals, and then relatively current feedback signal and separation signals and produce the running of a new motor rotary speed control signal with the control motor.
The present invention discloses a kind of controller for motor, and it comprises: a coil commutation circuit, a motor drive circuit, a separation signals produce circuit, a current detecting sample circuit and a comparison circuit.Wherein motor drive circuit is electrically connected on the coil commutation circuit, carries out phase place in order to the control coil commutation circuit and switches; The current detecting sample circuit is electrically connected on the coil commutation circuit, obtains a current feedback signal and output from the coil commutation circuit; Separation signals produces circuit in order to produce a separation signals and output; Comparison circuit then is electrically connected on the current detecting sample circuit respectively, separation signals produces circuit and motor drive circuit, in order to more above-mentioned current feedback signal and separation signals and produce a control signal, exporting motor drive circuit to, and then the running of control motor.
Description of drawings
Fig. 1 is the circuit block diagram of known controller for motor.
Fig. 2 is the waveform schematic diagram of known motor rotary speed control signal.
Fig. 3 is the waveform schematic diagram of the motor rotary speed control signal behind the known adding pulse-width modulation generation circuit.
Fig. 4 is the known current waveform schematic diagram.
Fig. 5 is the circuit block diagram of controller for motor preferred embodiment of the present invention.
Fig. 6 is the circuit diagram of controller for motor preferred embodiment of the present invention.
Fig. 7 produces the waveform schematic diagram of motor rotary speed control signal for preferred embodiment of the present invention.
Fig. 8 is the current waveform schematic diagram of equivalent motor rotary speed control signal in the preferred embodiment of the present invention.
Fig. 9 is the flow chart of the motor control method of the embodiment of the invention.
The reference numeral explanation
1 controller for motor, 10 motor drive circuits
12 Hall detection components, 14 coil commutation circuits
16 pulse-width modulations produce circuit 20 coil groups
21 motor rotary speed control signals, 22 current signals
5 controller for motor, 50 motor drive circuits
51 Hall detection components, 52 coil commutation circuits
53 pulse-width modulations produce circuit 54 current detecting sample circuits
55 separation signals produce circuit 56 low-pass filter circuits
57 comparison circuits, 60 coil groups
71 current feedback signals, 72 separation signals
73 control signals, 74 current signals
The S111-S116 step
Embodiment
Please refer to Fig. 5 and Fig. 6, it is the circuit block diagram and the circuit diagram of the controller for motor 5 of the present invention's first preferred embodiment, and wherein controller for motor 5 comprises that a motor drive circuit 50, a phase signal sample circuit (present embodiment is an example with a Hall detection components 51), a coil commutation circuit 52, a pulse-width modulation produce circuit 53, a current detecting sample circuit 54, a separation signals generation circuit 55, a low-pass filter circuit 56 and a comparison circuit 57; Wherein this motor drive circuit 50, Hall detection components 51, pulse-width modulation produce circuit 53 and coil commutation circuit 54 and known technology there is no different, so do not giving unnecessary details.
Separation signals provided by the present invention produces circuit 55 in order to produce a separation signals.Current detecting sample circuit 54 is electrically connected on coil commutation circuit 52 and low-pass filter circuit 56, the current feedback signal that when coil commutation circuit 52 obtains a detection motor running, is produced, and export low-pass filter circuit 56 to.Low-pass filter circuit 56 is electrically connected on current detecting sample circuit 54 and comparison circuit 57 respectively, detect the current feedback signal of sample circuit 54 outputs and the phase voltage in the filtering current feedback signal in order to received current, to export above-mentioned signal to comparison circuit 57.Two inputs of comparison circuit 57 are electrically connected on low-pass filter circuit 56 respectively and separation signals produces circuit 55, and output then is electrically connected on motor drive circuit 50, it is in order to after comparing current feedback signal and separation signals, produce a new motor rotary speed control signal and export in the motor drive circuit 50, and motor drive circuit 50 carries out the phase place switching by the coil groups 60 of 52 pairs of motors of this control signal control coil commutation circuit, to reach the purpose of control motor continuous running.
Said motor drive circuit 50 also can produce circuit 53 from a pulse-width modulation and obtain a pulse-width signal with modulation motor rotary speed control signal, and then changes the rotating speed of motor.
Please in conjunction with Fig. 7, the waveform schematic diagram that compares for current feedback signal 71 and separation signals 72 shown in the figure, wherein longitudinal axis A represents the amplitude of waveform, can be expressed as voltage (proportional relation between owing to voltage and electric current and power at this, so its longitudinal axis part also can be expressed as electric current or power in other embodiments), and transverse axis t is expressed as the time.Formed by the triangular wave of a plurality of continuitys and regular distribution by the separation signals 72 that separation signals generation circuit 55 above-mentioned as can be seen shown in the figure is produced; Yet this separation signals 72 is not limited to this, also can be by trapezoidal wave, sine wave or the polygon wave component of a plurality of regular distribution, or decide according to designer's needs.In addition, after above-mentioned separation signals 72 and current feedback signal 71 compare via comparison circuit 57, can obtain a new motor rotary speed control signal 73, and the mode of its comparison circuit 57 runnings is when the value of separation signals 72 during greater than the value of current feedback signal 71, can export a high level signal, otherwise then export a low level signal, mode promptly can produce above-mentioned motor rotary speed control signal 73 by this.Wherein control signal 73 is made up of a plurality of square wave, and among a phase range, with respect to the part (zone that is depression) that amplitude is lower in the current feedback signal 71, the ripple of its square wave wide (along the waveform width of time shaft) meeting broad, and the high more part of amplitude, the wide also relative narrower of its ripple, and with the size of amplitude, the ripple of its square wave is wide also can be changed thereupon.
In addition in conjunction with shown in Figure 8, above-mentioned control signal 73 can export motor drive circuit 50 to, and and then control motor running, and the current signal 74 of the equivalence during this motor running can more above-mentioned current feedback signal 71 waveforms more levels off to the dc state of desirable output, therefore, motor can obtain preferable efficient.
Moreover, because above-mentioned controller for motor 5 can constantly send the coil groups 60 of motor rotary speed control signal 73 to motor, therefore, above-mentioned control signal 73 all can be along with the waveform of the motor rotary speed control signal 74 of new generation is adjusted before each output, therefore, by constantly adjusting control signal 74, will make the motor running efficient can be better one by one.
Please refer to shown in Figure 9ly, the invention provides a kind of motor control method, it mainly improves a motor rotary speed control signal 73, and to promote motor running efficient, its step is as described below.
At first, when utilizing current detecting sample circuit 54 to detect motor running, equivalent current feedback signal 71 on its coil commutation circuit 52, this current feedback signal 71 also passes through low-pass filter circuit 56 with the part of the phase voltage in this current feedback signal 71 of filtering (as step S111, S112).
Produce circuit 55 via separation signals again and obtain a separation signals 72, wherein separation signals 72 is formed by the separation ripple of a plurality of continuitys and regular distribution, for example triangular wave, sine wave, trapezoidal wave or polygon ripple (as step S113).
Relatively after current feedback signal 71 and the separation signals 72, produce control signal 73, that is new motor rotary speed control signal 73 (as step S114 and S115);
Export this control signal 73 to motor drive circuit 50, and then the coil groups 60 of control motor, make motor continuous running (as step S116).
The above only is preferred embodiment of the present invention, and the foregoing description only is used for illustrating but not in order to limit claim of the present invention, category of the present invention is defined by claim.All equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (13)
1, a kind of motor control method, its step comprises:
Obtain a current feedback signal;
Produce a separation signals; And
Relatively this current feedback signal and this separation signals, and produce a motor rotary speed control signal to control the running of this motor.
2, motor control method as claimed in claim 1, wherein this current feedback signal when a current detecting sample circuit detects this motor running, the signal that a coil commutation circuit of this motor is produced.
3, motor control method as claimed in claim 1, wherein this current feedback signal also comprises a phase signal, and this current feedback signal passes through a low pass filter with this phase signal in this current feedback signal of filtering before comparing with this separation signals.
4, motor control method as claimed in claim 1 or 2, wherein this separation signals obtains from separation signals generation circuit.
5, motor control method as claimed in claim 4, wherein this separation signals is triangular wave, sine wave, trapezoidal wave or the polygon ripple signal of a plurality of continuitys and regular distribution.
6, motor control method as claimed in claim 1, wherein this motor rotary speed control signal is made up of a plurality of square wave, and among a specific phase range, amplitude lower region with respect to this current feedback signal, the wide meeting of its square wave ripple broad, and with respect to the amplitude upper zone of this current feedback signal, the wide meeting of its square wave ripple is narrower.
7, a kind of controller for motor, it comprises:
One coil commutation circuit;
One motor drive circuit is electrically connected on this coil commutation circuit, carries out the phase place switching in order to control this coil commutation circuit;
One current detecting sample circuit is electrically connected on this coil commutation circuit, obtains a current feedback signal and output from this coil commutation circuit;
One separation signals produces circuit, in order to produce a separation signals and output;
One comparison circuit, be electrically connected on this current detecting sample circuit, this separation signals generation circuit and this motor drive circuit respectively, in order to relatively this current feedback signal and this separation signals and produce a control signal, exporting this motor drive circuit to, and then control the running of this motor.
8, controller for motor as claimed in claim 7, wherein the mode of this comparison circuit running is when the value of separation signals during greater than the value of current feedback signal, can export a high level signal, otherwise then export a low level signal.
9, controller for motor as claimed in claim 7, wherein this separation signals is triangular wave, sine wave, trapezoidal wave or the polygon ripple signal of a plurality of continuitys and regular distribution.
10, controller for motor as claimed in claim 7, wherein this control signal is made up of a plurality of square wave, and among a specific phase range, amplitude lower region with respect to this current feedback signal, the wide meeting of its square wave ripple broad, and with respect to the amplitude upper zone of this current feedback signal, the wide meeting of its square wave ripple is narrower.
11, controller for motor as claimed in claim 7, it also comprises a phase signal sample circuit, be electrically connected on motor drive circuit, all commutation position signals that produced when detecting this motor running, and export this phase signal to this motor drive circuit.
12, controller for motor as claimed in claim 7, it also comprises a low-pass filter circuit, is electrically connected on this current detecting sample circuit and this comparison circuit respectively, in order to the phase signal in this current feedback signal of filtering and export this comparison circuit to.
13, controller for motor as claimed in claim 7, it comprises that also a pulse-width modulation produces circuit, is electrically connected on this motor drive circuit, in order to modulating the control signal that this motor drive circuit receives, and then changes the rotating speed of this motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101088876A CN101320950A (en) | 2007-06-05 | 2007-06-05 | Motor control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101088876A CN101320950A (en) | 2007-06-05 | 2007-06-05 | Motor control method and device |
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| Publication Number | Publication Date |
|---|---|
| CN101320950A true CN101320950A (en) | 2008-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101088876A Pending CN101320950A (en) | 2007-06-05 | 2007-06-05 | Motor control method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821995A (en) * | 2014-03-11 | 2014-05-28 | 扬州电力设备修造厂 | Control system and work method of intelligent electric execution mechanism |
| JP2018025679A (en) * | 2016-08-10 | 2018-02-15 | キヤノン株式会社 | Controller and lens device having the same |
-
2007
- 2007-06-05 CN CNA2007101088876A patent/CN101320950A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821995A (en) * | 2014-03-11 | 2014-05-28 | 扬州电力设备修造厂 | Control system and work method of intelligent electric execution mechanism |
| JP2018025679A (en) * | 2016-08-10 | 2018-02-15 | キヤノン株式会社 | Controller and lens device having the same |
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Application publication date: 20081210 |