CN101753078B - Device for controlling motor rotational speed and method thereof - Google Patents
Device for controlling motor rotational speed and method thereof Download PDFInfo
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- CN101753078B CN101753078B CN2009102618120A CN200910261812A CN101753078B CN 101753078 B CN101753078 B CN 101753078B CN 2009102618120 A CN2009102618120 A CN 2009102618120A CN 200910261812 A CN200910261812 A CN 200910261812A CN 101753078 B CN101753078 B CN 101753078B
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Abstract
The invention relates to a device for controlling motor rotational speed. The device is used for controlling a direct-current brush motor and comprises a motor driver, a detection unit and a CPU (central processing unit), wherein the motor driver is coupled with a first control terminal and a second control terminal of the direct-current brush motor; the detection unit detects the counter electromotive force of the direct-current brush motor through the first control terminal and the second control terminal when the motor driver is set to a forbidden energy state and then produces the information of the counter electromotive force; and the CPU judges whether the direct-current brush motor stops according to the information of the counter electromotive force and decides whether a brake control signal is produced according to the judging result. In addition, the rotational speed of the direct-current brush is reduced according to the brake control signal when the motor driver is in an enabled state.
Description
Technical field
The invention relates to a kind of device for controlling motor rotational speed and method, and particularly relevant for a kind of device for controlling motor rotational speed and method of optical memory system.
Background technology
Spindle Motor is the running axle center of optical memory system, and its function mainly is to carry video disc and drive its rotation, optical read head can be write on the data rail continuously or reads signal.Therefore, whether Spindle Motor possesses stable service performance will directly influence the highest doubly speed that reads that the access speed of optical memory system and rotating speed that Spindle Motor can reach also will limit optical memory system.
In the prior art; No. 584836 patent in Taiwan proposes a kind of CD speed control device and method; Armature supply (Armature current) by detecting Spindle Motor calculates the Spindle Motor parameter, and utilizes the Spindle Motor parameter to calculate relative rotation speed and reach the purpose of control motor.Yet the method need perform mathematical calculations to different Spindle Motors, in the hope of the pairing separately Spindle Motor parameter of motor.In addition; The method is to calculate armature supply through differential amplifier circuit (Differential amplifier); Therefore the armature supply that is calculated tends to there is error because of the coupling between resistance and noise problem, and then can't obtain Spindle Motor coefficient and rotating speed exactly.
In another prior art, Taiwan I274468 patent proposes a kind of direct-current brush motor brake control method and system that does not have Hall element.The method is when system start-up, earlier motor to be braked in advance, the stationary armature current value when stopping detecting and to note down motor.Afterwards, when motor need be braked control, the armature current value of output reverse control voltage and detection motor.Wherein, if detected armature current value is identical with the stationary armature current value, promptly represent this motor to remain static.Yet the shortcoming of the method is, all must first spended time be braked by motor in advance during each system start-up, to detect the stationary armature current value as distinguishing rule.
Summary of the invention
The present invention provides a kind of device for controlling motor rotational speed, under need not be through the mathematical operation formula or the situation of differential amplifier circuit, controls by the back electromotive force that detects direct-current brush motor.
The present invention provides a kind of motor rotation speed control method, under need not be through the mathematical operation formula or the situation of differential amplifier circuit, controls by detecting direct-current brush motor back electromotive force information.
The present invention proposes a kind of device for controlling motor rotational speed, has the direct-current brush motor of first control end and second control end in order to control, and device for controlling motor rotational speed comprises motor driver, detecting unit and central processing unit.Motor driver couples first control end and second control end of direct-current brush motor.Detecting unit is brought in the back electromotive force that detects direct-current brush motor through first control end and second control, and is produced back electromotive force information according to this in order to when motor driver is made as disabled state.Central processing unit is differentiated direct-current brush motor according to back electromotive force information and whether is in the state that stops operating; And according to differentiating the result and determine whether produce brake control signal, and motor driver is the velocity of rotation that reduces direct-current brush motor according to brake control signal when enabled.
In an embodiment of the present invention, above-mentioned detecting unit comprises first resistance, second resistance, switch and first analog-digital converter.First end of first resistance couples first control end, and first end of first resistance and second end detect the voltage and the second detection voltage in order to produce first respectively.First end of second resistance couples second end of first resistance, and second end of second resistance is coupled to one first reference voltage.First end of switch couples second end of first resistance, and second end of switch couples second control end.Wherein, motor driver be made as disabled state during, its first end of switch conduction and second end.First analog-digital converter becomes the corresponding digital value in order to the first detection voltage and second is detected voltage transitions, to produce back electromotive force information.
In an embodiment of the present invention, above-mentioned detecting unit comprises one the 3rd resistance, one the 4th resistance, one the 5th resistance and one second analog-digital converter.First end of the 3rd resistance couples first control end.First end of the 4th resistance couples second end of the 3rd resistance, and second end of the 4th resistance couples second control end, and first end of the 4th resistance detects voltage in order to produce one the 3rd.First end of the 5th resistance couples second end of the 4th resistance, and second end of the 5th resistance is coupled to one second reference voltage, and the voltage quasi position of second end of the 4th resistance is pulled to second reference voltage, to detect voltage as one the 4th.Second analog-digital converter becomes the corresponding digital value in order to the 3rd detection voltage and the 4th is detected voltage transitions, to produce back electromotive force information.
The invention allows for a kind of motor rotation speed control method, have a direct current brush motor of first control end and second control end in order to control, and said motor rotation speed control method comprises the following steps: to drive direct-current brush motor through motor driver; When motor driver is made as disabled state, brings in the back electromotive force that detects direct-current brush motor through first control end and second control, and produce back electromotive force information according to this; Differentiate direct-current brush motor according to back electromotive force information and whether stop operating, and determine whether produce brake control signal according to differentiating the result; And, when motor driver is made as enabled, reduce the velocity of rotation of direct-current brush motor according to brake control signal.
Based on above-mentioned, the present invention produces a back electromotive force information by the back electromotive force that detects direct-current brush motor, and controls the velocity of rotation of direct-current brush motor by this according to this.It should be noted that; The present invention need not can record back electromotive force through mathematical operation formula or differential amplifier circuit; So the present invention can avoid because of the resistance influence of the variation that caused that do not match, and then promotes the accuracy of device for controlling motor rotational speed in control.Moreover the present invention also need not expend time in when system start-up motor is braked in advance, so can reduce expending on time-histories effectively.
Description of drawings
The circuit framework figure of the device for controlling motor rotational speed that provides for embodiments of the invention shown in Figure 1.
Shown in Figure 2 is the circuit diagram of direct-current brush motor.
Shown in Figure 3 is the waveform sketch map of the rotating speed resolution of direct-current brush motor.
Circuit framework sketch map for a kind of detecting unit of providing according to embodiments of the invention shown in Figure 4.
The circuit framework sketch map of a kind of detecting unit that provides for another embodiment of the present invention shown in Figure 5.
The circuit framework sketch map of a kind of detecting unit that provides for further embodiment of this invention shown in Figure 6.
The flow chart of a kind of motor rotation speed control method that provides for embodiments of the invention shown in Figure 7.
[main element symbol description]
100: device for controlling motor rotational speed
110: motor driver
120: detecting unit
130: central processing unit
101: direct-current brush motor
TM11: first control end of direct-current brush motor
TM12: second control end of direct-current brush motor
D11: back electromotive force information
S11: brake control signal
Ra: interior resistance
Ea: back electromotive force
R2: resistance
V2: voltage
410,510: multiplexer
420,520: analog-digital converter
R41, R42, R51～R53: resistance
SW41: switch
ND41, ND42, ND51, ND52: tie point
VR4, VR5, VR6: reference voltage
V41, V42, V51, V52: detect voltage
Embodiment
The circuit framework figure of the device for controlling motor rotational speed that provides for embodiments of the invention shown in Figure 1.With reference to Fig. 1, device for controlling motor rotational speed 100 comprises motor driver 110, detecting unit 120 and central processing unit 130.Wherein, device for controlling motor rotational speed 100 is in order to control direct-current brush motor 101, and wherein direct-current brush motor 101 has the first control end TM11 and the second control end TM12.Before the operating principle of device for controlling motor rotational speed 100 of explanation present embodiment, below be further described with regard to the circuit characteristic of direct-current brush motor 101 earlier.
Shown in Figure 2 is the circuit diagram of direct-current brush motor.With reference to Fig. 2, direct-current brush motor 101 can equivalence becomes the series circuit of resistance R a and a back electromotive force Ea in one, and wherein back electromotive force Ea is direct-current brush motor 101 generation when rotating.At this, shown in (1), the velocity of rotation ω of the size of back electromotive force Ea and direct-current brush motor 101 is a proportional relation, and wherein Kb is a constant value, therefore can judge the speed of the velocity of rotation of direct-current brush motor 101 by the size that detects back electromotive force Ea.
Ea=Kb ω formula (1)
In the detection of back electromotive force Ea, as shown in Figure 2, if be connected with a resistance R 2 at the two ends of direct-current brush motor 101 TM11 and TM12, then resistance R 2 can record voltage V2 with the loop that direct-current brush motor 101 is constituted.Wherein, voltage V2 and back electromotive force Ea exist suc as formula the proportionate relationship shown in (2).Therefore, can calculate the size of back electromotive force Ea, and then determine the velocity of rotation of direct-current brush motor 101 through voltage V2.In addition, as shown in Figure 3, can change the size of voltage V2 accordingly by the big young pathbreaker who changes resistance R 2, and also can differentiate the resolution of the rotating speed of direct-current brush motor 101 by this.
Please continue with reference to Fig. 1, motor driver 110 couples the first control end TM11 and the second control end TM12 of direct-current brush motor 101.In addition, motor driver 110 can be set at disabled state or enabled, and wherein during disabled state, the two ends TM11 of motor driver 110 and direct-current brush motor 101 and TM12 are with mutual suspension joint (floating); In addition, during enabled, the signal that motor driver 110 will be sent according to central processing unit 130 comes direct-current brush motor 101 is carried out control corresponding.
In order to obtain the relevant information of direct-current brush motor 101 present rotating speeds; Detecting unit 120 is in order to when motor driver 110 is made as disabled state; The back electromotive force Ea that two ends TM11 and TM12 through direct-current brush motor 101 detects direct-current brush motor 101, and produce back electromotive force information D 11 according to this back electromotive force Ea.According to the circuit characteristic of above-mentioned direct-current brush motor 101, central processing unit 130 can be learnt the rotating speed that direct-current brush motor 101 is present through back electromotive force information D 11, and then judge direct-current brush motor 101 and whether be in the state that stops operating.
When judged result is a direct-current brush motor 101 when not stopping operating as yet, central processing unit 130 will produce brake control signal S11 and be sent to motor driver 110.At this moment, will reduce the velocity of rotation of direct-current brush motor 101 according to brake control signal S11 at the motor driver 110 of enabled.Relatively, when judged result is a direct-current brush motor 101 when having stopped operating, central processing unit 130 will stop to produce brake control signal S11.Thus; Because device for controlling motor rotational speed 100 is to control motor by detecting back electromotive force Ea; Therefore device for controlling motor rotational speed 100 need not the additional configuration differential amplifier circuit, also need not through the complex mathematical arithmetic expression, can control accordingly direct-current brush motor 101.In addition, in controlling the process of motor, device for controlling motor rotational speed 100 also need not expend time in when system start-up motor is braked in advance, so can reduce expending in time-histories effectively.
It should be noted that in the theoretic discussion of the circuit characteristic of direct-current brush motor shown in Figure 2 101, known to being connected across the resistance R 2 of direct-current brush motor 101 two ends TM11 and TM12, can record the voltage V2 relevant with back electromotive force Ea.Therefore, in practical application, detecting unit 120 promptly can utilize this principle to carry out the detection of back electromotive force Ea.In order to cause those skilled in the art can more understand present embodiment, below will enumerate the thin portion action that a plurality of embodiment come to explain further detecting unit 120.
The circuit framework sketch map of a kind of detecting unit that provides for embodiments of the invention shown in Figure 4, wherein for convenience of description for the purpose of, also comprise direct-current brush motor 101 among Fig. 4.With reference to Fig. 4, detecting unit 120 comprises resistance R 41 (i.e. first resistance), resistance R 42 (i.e. second resistance), switch SW 41, multiplexer 410 (i.e. first multiplexer) and analog-digital converter 420 (i.e. first analog-digital converter).
With reference to Fig. 4, first end of resistance R 41 couples the first control end TM11 of direct-current brush motor 101, and second end of resistance R 41 couples first end of resistance R 42.Second end of resistance R 42 is coupled to reference voltage VR4.First end of switch SW 41 couples second end of resistance R 41, and second end of switch SW 41 couples the second control end TM12 of direct-current brush motor 101.Multiplexer 410 is coupled to tie point ND41 and the ND42 of resistance R 41 and R42.Analog-digital converter 420 couples multiplexer 410.
Please be simultaneously with reference to Fig. 1 and Fig. 4, motor driver 110 be made as disabled state during, switch SW 41 is connected across the two ends TM11 and the TM12 of direct-current brush motor 101 with its first end of conducting and second end to cause resistance R 41.At this moment, first end of resistance R 41 and second end will produce respectively and detect voltage V41 and another detection voltage V42.In addition, according to formula (2), there are proportionate relationship in the pressure reduction between detection voltage V41 and the V42 and the back electromotive force Ea of direct-current brush motor 101.Therefore, in practical operation, analog-digital converter 420 can will detect voltage V41 and V42 converts the corresponding digital value respectively to, to produce back electromotive force information D 11.
By this, central processing unit 130 can be differentiated the size that detects the pressure reduction between voltage V41 and the V42 according to back electromotive force information D 11, and obtain the relevant information of the size of back electromotive force Ea by this.And know that when the pressure reduction between detection voltage V41 and the V42 was zero, promptly representing back electromotive force Ea was zero, just direct-current brush motor 101 has stopped operating.Therefore, when the pressure reduction between detection voltage V41 and the V42 is zero, the back electromotive force information D 11 that analog-digital converter 420 is produced will cause central processing unit 130 to stop to produce brake control signal S11.It should be noted that multiplexer 410 is the modes with time division multiplexing, cooperate the action of device for controlling motor rotational speed 100, in the scheduled period, transmit detection voltage V41 and V42 to analog-digital converter 420.In addition, the analog-digital converter 420 of other members in the device for controlling motor rotational speed 100 in can shared detecting unit 120.
The circuit framework sketch map of a kind of detecting unit that provides for another embodiment of the present invention shown in Figure 5, wherein for convenience of description for the purpose of, Fig. 5 also comprises direct-current brush motor 101.With reference to Fig. 5, detecting unit 120 comprises resistance R 51 (i.e. the 3rd resistance), resistance R 52 (i.e. the 4th resistance), resistance R 53 (i.e. the 5th resistance), multiplexer 510 (i.e. second multiplexer) and analog-digital converter 520.
With reference to Fig. 5, first end of resistance R 51 couples the first control end TM11 of direct-current brush motor 101, and second end of resistance R 51 couples first end of resistance R 52.Second end of resistance R 52 couples the second control end TM12 of direct-current brush motor 101.First end of resistance R 53 couples second end of resistance R 52, and second end of resistance R 53 is coupled to a reference voltage VR5.Multiplexer 510 is coupled to tie point ND51 and the ND52 of resistance R 51～R53.Analog-digital converter 520 couples multiplexer 510.
Please be simultaneously with reference to Fig. 4 and Fig. 5.At this, the maximum difference of Fig. 4 embodiment and Fig. 5 embodiment is that the resistance R 41 among Fig. 4 is replaced with R52 by two resistance R 51 among Fig. 5, and is connected across the two ends TM11 and the TM12 of direct-current brush motor 101.In addition, in Fig. 5 embodiment, do not dispose corresponding switch.With the circuit framework of Fig. 5 embodiment, being connected across the two ends TM11 of direct-current brush motor 101 and the voltage of TM12 can carry out dividing potential drop with R52 through resistance R 51.At this moment, first end of resistance R 52 will produce and detect voltage V51, and second end of resistance R 52 will produce another detection voltage V52.
It should be noted that detecting unit 120 can be avoided because of the too small shunt effect that causes of the resistance of resistance R 51～R53 by the accent of total resistance of resistance R 51～R53 is big under the situation that switch need not be set.In addition; Though the raising of total resistance of resistance R 51～R53 can cause the cross-pressure of direct-current brush motor 101 two ends TM11 and TM12 to become big; But detect voltage V51 and V52 and can obtain suitable decay, but therefore detect the scope that voltage V51 and V52 will can not exceed the input voltage of analog-digital converter 520 through the partial pressure effects of resistance R 51 and R52.
Please be simultaneously with reference to Fig. 1 and Fig. 5, in practical operation, analog-digital converter 520 can will detect voltage V51 and V52 converts the corresponding digital value respectively to, to produce back electromotive force information D 11.In addition, the relation of the back electromotive force Ea of pressure differential deltap V5 between detection voltage V51 and the V52 and direct-current brush motor 101 is suc as formula shown in (3).Therefore, central processing unit 130 can be differentiated the size that detects the pressure reduction between voltage V51 and the V52 according to back electromotive force information D 11, and obtain the relevant information of the size of back electromotive force Ea by this.Relatively, central processing unit 130 can determine whether produce brake control signal S11 according to differentiating the result.On the other hand; Multiplexer 510 is that the mode with time-sharing multiplex transmits in regular turn and detects voltage V51 and V52 to analog-digital converter 520; And other members in the device for controlling motor rotational speed 100 can pass through the switching of multiplexer 510, and shared together analog-digital converter 520.Concrete operation principle as for the embodiment of the invention comprises in the above-described embodiments, so do not repeat them here.
Yet, what deserves to be mentioned is that from the circuit characteristic of direct-current brush motor 101, the voltage quasi position of second end of resistance R 52 can be pulled to reference voltage VR5 through resistance R 53, that is to say, in practical operation, detect voltage V52 and be equal to reference voltage VR5.And know that analog-digital converter 520 also can receive another reference voltage and change accordingly.Therefore, as shown in Figure 6, when the reference voltage that is received when resistance R 53 and analog-digital converter 520 all be voltage VR6, this moment, analog-digital converter 520 can produce back electromotive force information D 11 through the detection voltage V51 reference voltage VR6 inner with it.Therefore, in Fig. 6 embodiment, the detection voltage that second end of resistance R 52 is produced need not to be sent to analog-digital converter 520 through multiplexer 610 (i.e. the 3rd multiplexer).
From another viewpoint; The flow process of a kind of motor rotation speed control method that provides for embodiments of the invention shown in Figure 7; Wherein said motor rotation speed control method has the direct-current brush motor of first control end and second control end in order to control; And comprise the following steps: at first, in step S710, drive direct-current brush motor through motor driver; Afterwards, in step S720, when motor driver was made as disabled state, first control end and second control end through direct-current brush motor detected the back electromotive force of direct-current brush motor, and produce back electromotive force information according to this; Then, in step S730, differentiate direct-current brush motor according to back electromotive force information and whether stop operating, and determine whether produce brake control signal according to differentiating the result; By this, in step S740, when motor driver is made as enabled, reduce the velocity of rotation of direct-current brush motor according to brake control signal.Idiographic flow as for the embodiment of the invention has been included among above-mentioned each embodiment, so do not repeat them here.
In sum, the present invention is by the back electromotive force that detects direct-current brush motor, controls the velocity of rotation of direct-current brush motor.In addition, the present invention need not can record back electromotive force through mathematic(al) representation or differential amplifier circuit, so the present invention can avoid because of the do not match influence of the variation that caused of resistance.Moreover the present invention also need not expend time in when system start-up motor is braked in advance, so can reduce expending on time-histories effectively.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the described protection range of claim.
Claims (8)
1. a device for controlling motor rotational speed has the direct-current brush motor of first control end and second control end in order to control, and this device for controlling motor rotational speed comprises:
Motor driver couples this first control end and this second control end;
Detecting unit in order to when this motor driver is made as disabled state, is brought in the back electromotive force that detects this direct-current brush motor through this first control end and this second control, and is produced back electromotive force information according to this, and this detecting unit comprises:
First resistance, its first end couples this first control end, and first end of this first resistance and second end detect the voltage and the second detection voltage in order to produce first respectively,
Second resistance, its first end couples second end of this first resistance, and second end of this second resistance is coupled to first reference voltage,
Switch, its first end couples second end of this first resistance, second end of this switch couples this second control end, wherein, this motor driver be made as disabled state during, its first end of this switch conduction and second end,
First analog-digital converter is in order to this first detection voltage is become the corresponding digital value with this second detection voltage transitions, to produce this back electromotive force information;
This device also comprises central processing unit; Differentiate this direct-current brush motor according to this back electromotive force information and whether be in the state that stops operating; And according to differentiating the result and determine whether produce brake control signal, and this motor driver is the velocity of rotation that reduces this direct-current brush motor according to this brake control signal when enabled.
2. device for controlling motor rotational speed according to claim 1, wherein this detecting unit also comprises:
First multiplexer in order to cooperate the action of this device for controlling motor rotational speed, transmits this first detection voltage and this second detection voltage to this first analog-digital converter in the scheduled period.
3. device for controlling motor rotational speed according to claim 1, wherein this detecting unit comprises:
The 3rd resistance, its first end couples this first control end;
The 4th resistance, its first end couples second end of the 3rd resistance, and second end of the 4th resistance couples this second control end, and first end of the 4th resistance detects voltage in order to produce one the 3rd;
The 5th resistance, its first end couples second end of the 4th resistance, and second end of the 5th resistance is coupled to second reference voltage, and the voltage quasi position of second end of the 4th resistance is pulled to this second reference voltage, to detect voltage as the 4th;
Second analog-digital converter becomes the corresponding digital value in order to the 3rd detection voltage and the 4th is detected voltage transitions, to produce this back electromotive force information.
4. device for controlling motor rotational speed according to claim 3, wherein this detecting unit also comprises:
Second multiplexer in order to cooperate the action of this device for controlling motor rotational speed, transmits the 3rd detection voltage and the 4th and detects voltage to this second analog-digital converter in the scheduled period.
5. device for controlling motor rotational speed according to claim 3, wherein this detecting unit also comprises:
The 3rd multiplexer; In order to cooperate the action of this device for controlling motor rotational speed, in the scheduled period, transmit the 3rd and detect voltage to this second analog-digital converter, wherein; This second analog-digital converter is more in order to receive this second reference voltage, with the voltage transitions of being correlated with.
6. device for controlling motor rotational speed according to claim 1; Wherein this detecting unit comprises a plurality of resistance of mutual serial connection; And the part tie point of those resistance couples this first control end and this second control end; This detecting unit produces this back electromotive force information according to the position at a plurality of detection voltages of those part tie points, and when those pressure reduction that detect voltages were zero, this central processing unit stopped to produce this brake control signal according to this back electromotive force information.
7. motor rotation speed control method have the direct-current brush motor of first control end and second control end in order to control, and motor rotation speed control method comprises:
Drive this direct-current brush motor through motor driver;
When this motor driver is made as disabled state, bring in the back electromotive force that detects this direct-current brush motor through this first control end and this second control, and produce back electromotive force information according to this, be specially:
The part tie point of a plurality of resistance that are connected in series each other is coupled to this first control end and this second control end; Acquisition is at a plurality of detection voltages of those part tie points; And those are detected voltages convert the corresponding digital value respectively to, to produce this back electromotive force information;
Differentiate this direct-current brush motor according to this back electromotive force information and whether stop operating, and determine whether produce brake control signal according to differentiating the result; And
When this motor driver is made as enabled, reduce the velocity of rotation of this direct-current brush motor according to this brake control signal.
8. motor rotation speed control method according to claim 7, wherein differentiate this direct-current brush motor and whether stop operating, and determine the step that whether produces this brake control signal to comprise according to differentiating the result according to this back electromotive force information:
Whether differentiate those pressure reduction that detect voltage according to this back electromotive force information is zero;
When the pressure reduction of those detection voltages is non-vanishing, judges that then this direct-current brush motor does not stop operating as yet, and produce this brake control signal; And
When those pressure reduction that detect voltage are zero, judge that then this direct-current brush motor stops operating, and stop to produce this brake control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102618120A CN101753078B (en) | 2009-12-30 | 2009-12-30 | Device for controlling motor rotational speed and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102618120A CN101753078B (en) | 2009-12-30 | 2009-12-30 | Device for controlling motor rotational speed and method thereof |
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| Publication Number | Publication Date |
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| CN101753078A CN101753078A (en) | 2010-06-23 |
| CN101753078B true CN101753078B (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102618120A Expired - Fee Related CN101753078B (en) | 2009-12-30 | 2009-12-30 | Device for controlling motor rotational speed and method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109425828A (en) * | 2017-09-05 | 2019-03-05 | 财团法人金属工业研究发展中心 | Motor characteristic detection method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490589B (en) * | 2015-12-03 | 2017-08-15 | 深圳市本特利科技有限公司 | D.c. motor static state is taken advantage of a situation starter, control method and d.c. motor |
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|---|---|---|---|---|
| CN1075282C (en) * | 1996-05-02 | 2001-11-21 | 西门子加拿大有限公司 | Control circuit for five-phase brushless DC motor |
| CN2478280Y (en) * | 2001-04-05 | 2002-02-20 | 张相军 | Rotor pole position detector of brushless d.c. motor |
| JP2002192075A (en) * | 2000-12-28 | 2002-07-10 | Matsushita Electric Ind Co Ltd | Brushless motor for vibration |
| CN100448156C (en) * | 2005-05-30 | 2008-12-31 | 凌阳科技股份有限公司 | Brake control method of DC electromotor with brush without Hall subassembly, and system |
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2009
- 2009-12-30 CN CN2009102618120A patent/CN101753078B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075282C (en) * | 1996-05-02 | 2001-11-21 | 西门子加拿大有限公司 | Control circuit for five-phase brushless DC motor |
| JP2002192075A (en) * | 2000-12-28 | 2002-07-10 | Matsushita Electric Ind Co Ltd | Brushless motor for vibration |
| CN2478280Y (en) * | 2001-04-05 | 2002-02-20 | 张相军 | Rotor pole position detector of brushless d.c. motor |
| CN100448156C (en) * | 2005-05-30 | 2008-12-31 | 凌阳科技股份有限公司 | Brake control method of DC electromotor with brush without Hall subassembly, and system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109425828A (en) * | 2017-09-05 | 2019-03-05 | 财团法人金属工业研究发展中心 | Motor characteristic detection method |
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| CN101753078A (en) | 2010-06-23 |
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