CN101997476A - Motor driving device and method - Google Patents
Motor driving device and method Download PDFInfo
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- CN101997476A CN101997476A CN2009101666220A CN200910166622A CN101997476A CN 101997476 A CN101997476 A CN 101997476A CN 2009101666220 A CN2009101666220 A CN 2009101666220A CN 200910166622 A CN200910166622 A CN 200910166622A CN 101997476 A CN101997476 A CN 101997476A
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Abstract
The invention discloses a motor driving device, comprising a control unit and an output unit, wherein the control unit is connected with a control signal and outputs the control signal to the output unit after processing the control signal. The motor driving device is characterized in that: the control unit comprises a noise filter which causes the control unit to enter a restart state according to a second set time and causes the control unit to send the control signal to the output unit according to a third set time so as to drive a motor.
Description
Technical field
The invention relates to a kind of drive unit of single-phase motor, particularly has a drive unit that prevents that noise from making the mistake and starting relevant for a kind of, be the startup signal of controlling motor by a noise filter circuit, with the drive unit that prevents that noise from making the mistake and starting.
Background technology
In recent years, personal computer (Personal Computer, PC), portable computer (Portable Computer/Note-Boob, NB) or the rapid development of work station (Work Station), make the rapid rising of running speed of compute chip, for example: CPU (Central Processor Unit, CPU), digital signal processor (Digital Signal Processor, DSP).Therefore, along with the increase of chip responsiveness, also make and frequency gets higher cause chip to produce a large amount of heat.Yet high heat can cause following problem: cause the chip computing undesired, perhaps peripheral circuits is exerted an influence.Therefore, the heat sinking function of chip becomes extremely important technology.
Generally speaking, be used as the method for this type operation chip cooling, all can select fan (Fan) to dispel the heat with technology maturation.For example, by the rotating speed of control fan cool air being delivered to chip surface takes away heat.Yet the motor that dispels the heat in drive fan has following two kinds of situations and causes motor to stop operating when rotating; One of them is: be clamped in fan or the motor as foreign matter, (when being so-called deadlock-locked), having excessive electric current in motor coil and the semiconductor subassembly flows through, thereby can make motor damage and make that fan or motor can't normal rotation because of blocking.In order to handle the problems referred to above; US publication the 20080315808th patent application promptly discloses a kind of magnetic hysteresis output state that is monitored Hall subassembly by locking protection circuit 32; so that can behind definite motor deadlock, can stop immediately to the motor coil energising, as shown in Figure 1.On the other hand, the Another reason that can cause motor to stop operating be system (for example: the CPU of portable computer) provide a requirement " motor stops operating " controlling signal (V
Cnt), for example: the PWM signal that will control revolution becomes electronegative potential signal (Low), promptly controls output stage 24 and stops immediately motor coil is switched on; The purpose of this mode is being saved expending of energy.Therefore when locking protection circuit detect the PWM signal be the electronegative potential signal and keep a period of time after because the control that the system of process provides " motor stops operating " controlling signal (V
Cnt) in, may have external noise, make chip produce malfunction and cause motor to rotate once more that the system that makes can't reach the purpose of energy savings.
Summary of the invention
The purpose of this invention is to provide a kind of motor drive and method, to solve the defective in the known technology.
For achieving the above object, motor drive provided by the invention, comprise a control unit and an output unit, and control unit is connected with a controlling signal and controlling signal handled after, deliver to output unit, wherein motor drive is characterised in that: control unit comprises a noise filter means, noise filter means makes this control unit enter restart mode according to one second setting-up time, and make control unit that controlling signal is delivered to this according to one the 3rd setting-up time again and go out the unit, in order to drive a motor.
Motor driven method provided by the invention, wherein: controlling signal to a motor drive is provided, and controlling signal is a PWM signal; One oscillation device is provided, and this oscillation device configuration is in motor drive, in order to produce an initial time and a noise judgement time; One noise filter means is provided, in order to duration of electronegative potential of receiving controlling signal and judging the PWM signal whether greater than initial time; Initialization one control device, when electronegative potential duration of this PWM signal greater than initial time after, control device enters one according to the output signal of noise filter means and waits for starting state; Judging that one starts signal state, is to judge the pulse wave cycle that starts signal by noise filter means, when the pulse wave cycle that starts signal greater than the noise judgement time after, will start signal and export an output unit to.
Whether the motor drive that disposes the noise filtering function provided by the invention is noise in order to judge controlling signal, to solve in the known technology because noise causes chip to produce the problem of malfunction.
The motor driven chip that disposes noise filter means provided by the invention judges by noise filter means whether controlling signal is noise, produces malfunction to reduce chip.
The motor driven chip that disposes noise filter means provided by the invention is in order to reach the purpose of energy savings.
The motor driven chip that disposes noise filter means provided by the invention makes the motor driven chip stop driving to motor according to the indication of control signal.
The motor driven chip that disposes noise filter means that provides of the present invention can carry out CD-ROM drive motor according to the indication of control signal, makes fan rotate to reach the purpose of heat radiation.
Description of drawings
Fig. 1 is the circuit box schematic diagram that technology is known in a change;
Fig. 2 is the circuit box schematic diagram of a preferred embodiment of the present invention;
Fig. 3 is the waveform schematic diagram of each node among Fig. 2 of the present invention;
Fig. 4 is the waveform schematic diagram of restarting of the present invention.
Primary clustering symbol description in the accompanying drawing
Embodiment
Because the present invention discloses a kind of motor driven chip and driving method thereof that disposes noise filter means, particularly dispose noise filter means in the motor driven chip, judge by noise filter means whether controlling signal is noise, produce malfunction to reduce chip.Right owing to motor output unit circuit mentioned among the present invention is employed identical with known technology, so the detailed circuit of motor output unit is not shown among the figure.In addition, following in graphic in the literary composition, also not according to the actual complete drafting of relative dimensions, its effect is only being expressed the schematic diagram relevant with feature of the present invention.
At first please refer to Fig. 2, is the schematic diagram of motor drive of the present invention.As shown in Figure 2, motor drive 10 comprises a control unit 100 and an output unit 200; Wherein control unit 100 is made up of a Hall bias voltage 110, a magnetic hysteresis device 120, a control device 130, one anti-deadlock judgment means 140, a counting device 150, an oscillation device 160 and a noise filter means 170.When controlling signal 30 provides the PWM of a high potential to drive signal, the PWM of this high potential drives signal can be through the control device 130 in the control unit 100, so that being driven signal, this PWM delivers in the output unit 200, control coil current the output unit 200 (promptly feeding electric current) by the driving voltage that drives signal output from PWM, begin to rotate with control motor 40; Then, the Hall subassembly 20 that is arranged on the motor 40 can be delivered to magnetic hysteresis device 120 and output unit 200 with the commutation signal of motor 40, in order to judge whether motor 40 continue in rotation.Be noted that at this motor 40 of the present invention can be a kind of single-phase full wave motor, yet it also can be a kind of three-phase motor; When motor 40 of the present invention is three-phase motor, only the schematic diagram of one of them phase place in the three-phase motor among Fig. 2.
Then, describe the operating process of motor drive of the present invention in detail according to Fig. 2 and Fig. 3.
At first, please also refer to Fig. 2 and Fig. 3.As controlling signal (V
Cnt) 30 when providing PWM to drive signal; The pulse wave that this PWM driving signal is high levels (high level) and the mutual conversion of low level (low level) forms, as the V of Fig. 3
CntShown in; Then this PWM driving signal can be through the control device 130 in the control unit 100, so that being driven signal, this PWM delivers in the output unit 200, by the high-level voltage that drives signal output from PWM control output unit 200 output current to motor 40 coil (not being shown among the figure), begin to rotate with control motor 40.Then, the 1st terminal of Hall subassembly 20 is connected with the power line that is applied with Hall bias voltage 110 via resistance 21, and its 2nd terminal is via resistance 22 ground connection.Hall subassembly 20 can be by the 1st output output hall signal V
H1And the 2nd output output hall signal V
H2, the position of this two output signal is accurate to be changed along with the position of motor 40 rotors.When motor 40 rotations, hall signal V
H1And hall signal V
H2Be mutual anti-phase and cycle to form class string ripple along with the rotating speed of motor 40; And after this type of string ripple is through magnetic hysteresis device 120, can form square wave, and for example, when magnetic hysteresis device 120 will be from the hall signal V of Hall subassembly 20 outputs
H1With hall signal V
H2Row is relatively worked as V
H1＞V
H2, magnetic hysteresis device 120 is output as the square-wave signal of high levels, works as V
H1＜V
H2, magnetic hysteresis device 120 is output as the square-wave signal of low level.
Then, the square-wave signal (shown in the NODE A of Fig. 3) that magnetic hysteresis device 120 is exported is connected to counting device 150, and counting device 150 is counted the high levels of square-wave signal and the transition state of low level thus.In one first time of setting (for example 500us-500ms) represents that then motor 40 is in the state of normal operation when the conversion of high levels and low level is arranged when counting device 150; At this moment, counting device 150 can be delivered to the signal (for example sending the signal of a low level) of this state in the anti-deadlock judgment means 140, makes anti-deadlock judgment means 140 also send the signal of a low level to control device 130.At this moment, control device 130 can drive the PWM of high potential signal and deliver in the output unit 200, come controlling output circuit 210 and output circuit 220 to provide current to coil on the motor 40 by the high levels driving voltage that drives signal output from PWM, rotate with CD-ROM drive motor 40.
In addition, when counting device 150 can only be counted to high levels or low level in this first time of setting (square-wave signal of representing 120 outputs of magnetic hysteresis device is high levels or low level), the phase place of then representing motor 40 does not have conversion, exists as OUT1, the OUT2 of Fig. 3 " the motor deadlock " extremely " the deadlock detecting " during shown in.Clearly, at this moment motor 40 is to be in the state that stops operating.At this moment, counting device 150 can be delivered to the signal (for example sending the signal of a high levels) of this state in the anti-deadlock judgment means 140, makes anti-deadlock judgment means 140 also send the signal of a high levels to control device 130; Then, control device 130 can be sent the signal of a low level to output unit 200, make output circuit 210 and output circuit 220 close, therefore can not provide current to the coil on the motor 40, so motor is stopped immediately, to prevent motor 40 under deadlock state, output circuit 210 and output circuit 220 still fed multiple current, and caused motor to produce expendable fault.
After the process system handles, when if counting device 150 can be counted to a standard again conversion is arranged in the time that first sets, represent that then motor 40 has been in the state of normal operation, then control device 130 can be delivered to the PWM driving signal of high potential in the output unit 200 again, is rotated further with CD-ROM drive motor 40.
Follow again,, can select controlling signal (V if work as system in order to reach the purpose of saving the energy
Cnt) the 30 PWM signals that provide change over electronegative potential (low voltage), as the V of Fig. 4
CntOscillogram.Therefore, control device 130 also can be sent the signal of a low level to output unit 200, makes output circuit 210 and output circuit 220 close, and therefore can not provide current to the coil on the motor 40, so motor 40 stops operating immediately.
Then, motor 40 can remain on the state that stops operating always, up to system optionally with controlling signal (V
Cnt) the 30 PWM signals that provide change over high potential.At this moment, the PWM signal of this high potential can provide electric current the coil to the motor 40, so that motor 40 rotates again.After motor 40 rotated again, counting device 150 judged that in first time of setting motor 40 is in the state of normal operation; At this moment, counting device 150 can be delivered to the signal (for example sending the signal of a low level) of this state in the anti-deadlock judgment means 140, makes anti-deadlock judgment means 140 also send the signal of a low level to control device 130.Then, control device 130 can drive the PWM of high potential signal and deliver in the output unit 200, come controlling output circuit 210 and output circuit 220 to provide current to coil on the motor 40 by the high levels driving voltage that drives signal output from PWM, rotate with control motor 40.
Similarly, if a period of time after restarting revolution, when counting device 150 can only be counted to high levels or low level again in first time of setting, the phase place of then representing motor 40 does not have conversion, then, can be as aforesaid processing procedure, anti-deadlock judgment means 140 is sent the signal of a high levels to control device 130; Control device 130 then can be sent the signal of a low level to output unit 200, make output circuit 210 and output circuit 220 close, therefore can not provide current to the coil on the motor 40, so motor is stopped immediately, to prevent that motor 40 is under deadlock state, output circuit 210 and output circuit 220 still fed multiple current, and caused motor to produce expendable fault.
Clearly, in said process, controlling signal (V
Cnt) 30 PWM that provided drive signal, are that control motor 40 rotates or the main signal that stops; As controlling signal (V
Cnt) (pulse wave that is actually high levels and the mutual conversion of low level was formed, as the V of Fig. 3 when 30 PWM that provided drove signal by high potential
Cnt), then control device 130 can be delivered to the PWM driving signal of high potential in the output unit 200, come controlling output circuit 210 and output circuit 220 to provide current to coil on the motor 40 by the high levels driving voltage that drives signal output from PWM, rotate with control motor 40.And as controlling signal (V
Cnt) when 30 PWM that provided drive signals and change electronegative potential into (as the V of Fig. 4
Cnt), then control device 130 can cut out output circuit in the output unit 200 210 and output circuit 220, therefore can not provide current to the coil on the motor 40, so motor 40 remains on the state that stops operating.As controlling signal (V
Cnt) when the 30 PWM driving signals that provided were changed into high potential once more, then control device 130 can be delivered to the PWM driving signal of high potential in the output unit 200, makes electric current can flow through the coil on the motor 40, to restart motor 40 rotations again.
Then, please refer to as shown in Figure 4, as controlling signal (V
Cnt) after 30 PWM that transmitted drive signals and keep low levels to surpass a special time, for example: one second setting-up time (T
Ini), controlling signal (V
Cnt) 30 PWM that transmitted drive signals and just can enter noise filter means 170.As controlling signal (V
Cnt) after 30 PWM that transmit drove signals and enter noise filter means 170, noise filter means 170 can judge that it is high potential or electronegative potential that PWM drives signal according to this second setting-up time (for example 0.05 second); This second setting-up time also can be called initial time (T
Ini).Follow again, as controlling signal (V
Cnt) when the 30 PWM driving signals that provided were continuously electronegative potential, clearly, noise filter means 170 was at initial time (T
Ini) in all do not count to the high levels of high potential and the pulse wave of the mutual conversion of low level, then noise filter means 170 can judge that it be an electronegative potential signal that PWM drive signals; In other words, surpass initial time (T when the time
Ini) after, when still not having the high potential signal, motor this moment stops operating.At this moment, system promptly can be with control device 130 initialization, and so-called initialization is about to control device 130 and is preset in the state of restarting of waiting for.Control device 130 enters sequential chart after the initial condition shown in the 4th figure, power supply (V
Cc) can be at high potential, Hall bias voltage (HB) can be charged to preset potential simultaneously, after this moment, system can wait for that PWM driving signal becomes high potential, restarts motor 40 immediately.
As controlling signal (V
Cnt) when the 30 PWM driving signals that provided changed over high potential by electronegative potential, this high potential signal can be sent to noise filter means 170 simultaneously.At this moment, noise filter means 170 can enter another gate time (or claiming the 3rd setting-up time), this the 3rd setting-up time can be selected to be set at and drive the pulse bandwidth of each high levels or the low level of signal less than PWM (for example: 20us), and noise filter means 170 can judge that the high potential signal that enters is noise or is PWM driving signal according to this 3rd setting-up time.The pulse bandwidth that enters noise filter means 170 when the high potential signal is during less than the 3rd setting-up time, and then noise filter means 170 can judge that it is a noise and filtering; The pulse bandwidth that enters noise filter means 170 when the high potential signal is during greater than the 3rd setting-up time, and then noise filter means 170 can judge that it drives signal for PWM, therefore can export a signal (for example sending the signal of a low level) immediately and arrive control device 130.At this moment, control device 130 can be delivered to the PWM driving signal of high potential in the output unit 200 according to aforesaid mode of operation, control output circuit 210 and output circuit 220 by the driving voltage that drives signal output from PWM and provide current to coil on the motor 40, restart with control motor 40.To emphasize at this when system entered the state of restarting, clearly, noise filter means 170 can judge earlier whether the high potential signal that enters is noise, and can after judging that PWM driving signal is high potential, just can send signal to control device 130; Therefore, system enter initialization and enter wait for the state restart after, after the high potential signal enters noise filter means 170, when control device 130 can postpone one the 3rd setting-up time after, just can restart motor 40 again, shown in the OUT1/OUT2 of Fig. 4.This elder generation judges that by noise filter means 170 whether high potential is the function of noise, can effectively avoid controlling signal (V
Cnt) 30 be subjected to that extraordinary noise disturbs and error starting motor 40.And this noise jamming may be to use long or the like the factor of lead to cause by external factor or controlling signal.
Again as shown in Figure 4, as controlling signal (V
Cnt) 30 PWM that provided drive signals and change over electronegative potential by high potential again, and surpass the initial time (T of second setting-up time when this electronegative potential time
Ini) after, system promptly can restart with wait again with control device 130 initialization.
In addition, illustrate once more that the counting device 150 among Fig. 2 all can be connected with an oscillator 160 with noise filter means 170; Clearly, this oscillator 160 is intended for the benchmark of counting device 150 and noise filter means 170 timing.Therefore oscillator 160 can provide above-mentioned first setting-up time, second setting-up time and the 3rd setting-up time.
In addition, can comprise further that in motor drive 10 of the present invention a heat blocks (Thermal Shut Down; TSD) circuit 180; Or overcurrent (over-current) circuit 180, so that motor driven chip 10 has the better protection function.Because heat is blocked (TSD) circuit and overcurrent (over-current) circuit is known technology, so no longer narrated.
Moreover motor drive 10 of the present invention is can amass bodyization in a chip.Yet motor drive 10 of the present invention also can be made up of control unit 100 formed chips and output unit 200 formed chips.
Comprehensive above-mentioned explanation, the present invention then provide a kind of motor driven method, at first, provide a controlling signal (V by system
Cnt) 30 to one motor drives 10, this controlling signal 30 can be a PWM signal; Then, provide an oscillation device 160, oscillation device 160 is disposed in the motor drive 10, and is connected with a noise filter means 170, (or claims initial time-T in order to produce one second setting-up time
Ini) and one the 3rd setting-up time (or claiming the noise judgement time); Then, provide a noise filter means 170, this noise filter means 170 is disposed in the motor drive 10, in order to receive controlling signal (V
Cnt) 30 and judge controlling signal (V
Cnt) whether duration of electronegative potential of 30 PWM signal greater than initial time; When electronegative potential duration that noise filter means 170 is judged the PWM signals greater than initial time after, then control device 130 can be initialised, and makes control device 130 enter one according to the output signal of noise filter means 170 and waits for starting state; Follow again, after control device 130 enters starting state, as controlling signal (V
Cnt) when 30 PWM signal changes high potential into by electronegative potential, noise filter means 170 can be judged the pulse wave cycle of high potential, when the pulse wave cycle that starts signal greater than the noise judgement time after, will start signal and export an output unit 200 to, so that CD-ROM drive motor 40 is rotated; If the pulse wave cycle of working as the startup signal then is considered as noise and filtering with this high potential signal less than the noise judgement time.
As previously mentioned, the present invention has described the preferred embodiment of motor driven chip 10 in detail, and its main purpose is for illustrating embodiments of the invention, so that those skilled in the art are implemented, it is not intended to limit accurate application form of the present invention.So those skilled in the art are by above-mentioned instruction, suggestion or to be done to revise to a certain degree by embodiments of the invention study be possible.Therefore, technological thought of the present invention will be decided by claim scope of applying for and equalization thereof.
Claims (10)
1. a motor drive comprises a control unit and an output unit, and this control unit is connected with a controlling signal and with after this controlling signal processing, delivers to this output unit, and wherein this motor drive is characterised in that:
This control unit comprises a noise filter means, this noise filter means makes this control unit enter restart mode according to one second setting-up time, and make this control unit that this controlling signal is delivered to this output unit according to one the 3rd setting-up time again, in order to drive a motor.
2. motor drive as claimed in claim 1, wherein, this second setting-up time is after this PWM signal changes to electronegative potential by high potential, to keep this electronegative potential to one setting-up time.
3. motor drive as claimed in claim 1, wherein, the 3rd setting-up time is less than the time in the pulse wave cycle of this controlling signal.
4. motor drive, comprise a control unit and an output unit, after this control unit is connected with a controlling signal and this controlling signal is handled, deliver to this output unit, and this control unit system is made up of a magnetic hysteresis device, a control device, an anti-deadlock judgment means, a counting device, an oscillation device and a noise filter means, and wherein this motor drive is characterised in that:
This noise filter means makes this control unit enter restart mode according to one second setting-up time, and makes this control unit that this controlling signal is delivered to this output unit according to one the 3rd setting-up time again, in order to drive a motor.
5. motor drive as claimed in claim 4, wherein, this second setting-up time is after this PWM signal changes to electronegative potential by high potential, to keep this electronegative potential to one setting-up time.
6. motor drive as claimed in claim 4, wherein, the 3rd setting-up time is less than the time in the pulse wave cycle of this controlling signal.
7. motor drive as claimed in claim 4, wherein, this counting device is connected with this magnetic hysteresis device, and judges the output state of this magnetic hysteresis device according to one first setting-up time.
8. motor drive as claimed in claim 4, wherein, this motor drive is a chip.
9. motor drive as claimed in claim 4, wherein, this control unit and this output unit chip of all respectively doing for oneself.
10. motor driven method is characterized in that:
One controlling signal to a motor drive is provided, and this controlling signal is a PWM signal; One oscillation device is provided, and this oscillation device configuration is in this motor drive, in order to produce an initial time and a noise judgement time;
One noise filter means is provided, and this noise filter means is disposed in this motor drive and with this oscillation device and is connected, in order to duration of electronegative potential of receiving this controlling signal and judging this PWM signal whether greater than this initial time;
Initialization one control device, this control device is disposed in this motor drive and with this noise filter means and is connected, when this electronegative potential duration of this PWM signal greater than this initial time after, this control device enters one according to the output signal of this noise filter means and waits for starting state;
Judge that one starts signal state, judge pulse wave cycle of this startups signal by this noise filter means, when pulse wave cycle of this startup signal greater than this noise judgement time after, should start signal and export an output unit to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101666220A CN101997476B (en) | 2009-08-24 | 2009-08-24 | Motor driving device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101666220A CN101997476B (en) | 2009-08-24 | 2009-08-24 | Motor driving device and method |
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| CN101997476A true CN101997476A (en) | 2011-03-30 |
| CN101997476B CN101997476B (en) | 2012-12-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036484A (en) * | 2011-10-09 | 2013-04-10 | 晶致半导体股份有限公司 | Motor drive device capable of achieving motor switch-on soft start and lock soft start |
| CN103312260A (en) * | 2012-03-13 | 2013-09-18 | 晶致半导体股份有限公司 | Motor drive device with minimum rotation speed setting and maximum rotation speed setting |
| CN104377999A (en) * | 2013-08-13 | 2015-02-25 | 立锜科技股份有限公司 | Motor control method and device |
-
2009
- 2009-08-24 CN CN2009101666220A patent/CN101997476B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036484A (en) * | 2011-10-09 | 2013-04-10 | 晶致半导体股份有限公司 | Motor drive device capable of achieving motor switch-on soft start and lock soft start |
| CN103036484B (en) * | 2011-10-09 | 2015-02-04 | 晶致半导体股份有限公司 | Motor drive device |
| CN103312260A (en) * | 2012-03-13 | 2013-09-18 | 晶致半导体股份有限公司 | Motor drive device with minimum rotation speed setting and maximum rotation speed setting |
| CN103312260B (en) * | 2012-03-13 | 2015-08-19 | 晶致半导体股份有限公司 | There is the motor drive of minimum speed and maximum speed setting |
| CN104377999A (en) * | 2013-08-13 | 2015-02-25 | 立锜科技股份有限公司 | Motor control method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101997476B (en) | 2012-12-19 |
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