CN107404279B - motor and rotating speed control method thereof - Google Patents
motor and rotating speed control method thereof Download PDFInfo
- Publication number
- CN107404279B CN107404279B CN201610377734.0A CN201610377734A CN107404279B CN 107404279 B CN107404279 B CN 107404279B CN 201610377734 A CN201610377734 A CN 201610377734A CN 107404279 B CN107404279 B CN 107404279B
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- voltage value
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000010355 oscillation Effects 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract 2
- 230000001276 controlling effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000011469 building brick Substances 0.000 description 2
- 230000001151 other effect Effects 0.000 description 2
- 241000883990 Flabellum Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000010415 tropism Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2205/00—Indexing scheme relating to controlling arrangements characterised by the control loops
- H02P2205/07—Speed loop, i.e. comparison of the motor speed with a speed reference
Abstract
The invention relates to a motor and a rotating speed control method thereof, which are used for solving the problem that the actual rotating speed of the existing motor is nonlinear, the method can be applied to a control unit, and the control unit can regulate and control the rotating speed of the motor, and the method can comprise the following steps: the control unit compares the voltage value of a reference signal with the voltage value of an oscillation signal to generate a logic signal for controlling the rotating speed of the motor; the voltage value of the reference signal is converted according to the duty cycle of a pulse width modulation signal, the waveform of the oscillation signal has a charging period and a discharging period, and the maintaining time of the discharging period is longer than that of the charging period. Thus, the above problems can be surely solved.
Description
Technical field
The present invention relates to a kind of motor and its control methods；In particular to a kind of motor and its method for controlling number of revolution.
Background technique
Electric energy can be switched to power output by existing motor, so as to the power resources as devices such as fans, be with fan
Example drives flabellum to generate air-flow, can be used to the purposes such as air circulation or heat dissipation by motor.
By taking existing fan motor as an example, believed by one control of universal fan driver (fan driver ASIC) output
Number to motor coil, cooperation inductive component (such as Hall subassembly) sensing motor running state parameter, motor can be driven
Rotor rotates and outputting torsion.
Refering to Figure 1, it is the actual speed curve of existing motor and the comparison schematic diagram of desired speed curve.
Wherein, as the duty cycle (DUTY CYCLE) of the control signal (such as pwm signal) increases, the desired speed curve C1 of motor
Linear trend, but the actual speed curve C2 of motor is but in nonlinear curve, the actual speed curve C2 and desired speed
Curve C1's is linear inconsistent, and the revolving speed of fan motor is caused not to be adjusted using the duty cycle directly, and needs additional
Tach signal compensation circuit is added to finely tune revolving speed, therefore will increase the cost and degree of difficulty of motor control.
In view of this, it is necessary to improve the defect of the above-mentioned prior art, to meet actual demand, promote the practicality.
Summary of the invention
The present invention provides a kind of motor, and actual speed relation curve can be made to tend to linearly, simplify motor rotary speed with benefit and control
Process.
The present invention additionally provides a kind of motor rotation speed control methods, and the actual speed relation curve of motor can be made to tend to line
Property, motor rotary speed control process is simplified with benefit.
The present invention provides a kind of motor rotation speed control method, can be applied to a control unit, for control unit regulation one
The step of revolving speed of motor, the motor rotation speed control method can include: compare the voltage value of a reference signal by the control unit
A logical signal is generated with the voltage value of an oscillator signal, to control the revolving speed of the motor；Wherein, the electricity of the reference signal
Pressure value is converted according to the duty cycle of a pulse-width modulation signal, and the waveform of the oscillator signal is put with a charge period and one
Electric period, the holding time greater than the charge period of holding time of the electric discharge period.
The present invention additionally provides a kind of motors, it may include: a stator has a coil module, to drive a rotor to revolve
Turn；And a control unit, it is electrically connected with the coil module, which compares the voltage value of a reference signal and one and vibrate
The voltage value of signal and generate a logical signal, to control the revolving speed of the rotor；Wherein, the voltage value of the reference signal according to
The duty cycle of one pulse-width modulation signal converts, and the waveform of the oscillator signal has a charge period and an electric discharge period,
The holding time greater than the charge period of holding time of the electric discharge period.
Described control unit can determine whether the voltage value of the oscillator signal is less than the voltage value of the reference signal, if judgement
Be it is yes, the voltage value of the logical signal is a low level voltage, if being judged as NO, the voltage value of the logical signal is a high levle
Voltage；The time scale value range of the electric discharge period and the charge period can be between 1.1 to 4.Whereby, it is available for users to adjustment
The degree of speed considerations, to meet motor real-world operation demand.
Described control unit can have a level pressure output end, base letter input terminal, an oscillation connecting pin and a speed control output
Port, the level pressure output end can be used to export certain voltage, and base letter input terminal can be used to input the reference signal, oscillation connection
End can be used to input the oscillator signal, and speed control output port can be electrically connected with the coil module of the stator；The oscillation connection
End can be electrically connected to a ground terminal with a capacitor；It can be with a current limliting group between the level pressure output end and the oscillation connecting pin
Part is electrically connected；It is electrically connected between the level pressure output end and an information source input port with a signal adapter.Whereby, the control
Reference signal made of unit can be converted according to the pulse-width modulation signal is convenient for controlling the revolving speed of the motor.
Said motor and its method for controlling number of revolution can simply change the time scale model of electric discharge period Yu the charge period
Value is enclosed, such as: adjusting the resistance value of the current limiting component between the level pressure output end and capacitor, mend without additional tach signal
Circuit is repaid, the linear degree of the actual speed curve of motor can be adjusted easily, when the time scale value is 4, the motor
The linear degree highest that actual speed curve is presented, almost Chong Die with desired speed curve, can achieve reduces motor rotary speed control
Cost and reduction motor rotary speed control complexity of system and other effects, may be applicable to various motor rotary speed control circuit, such as: wind
Revolving speed control etc. is fanned, motor use demand amount can be further increased.
Detailed description of the invention
Fig. 1: for the comparison schematic diagram of the ideal and actual speed of existing fan motor.
Fig. 2: for the circuit diagram of motor system embodiment of the invention.
Fig. 3: for the signal schematic representation of the embodiment of the present invention.
Fig. 4: for the comparison schematic diagram of the different rotating speeds curve of the motor of the embodiment of the present invention.
Description of symbols
﹝ Xian You Ji Shu ﹞
The desired speed curve of C1 motor
The actual speed curve of C2 motor
﹝ this Fa Ming ﹞
1 motor, 11 stator
111 coil module, 2 control unit
21 level pressure output end, 22 base believes input terminal
23 oscillation connecting pin, 24 speed control output port
3 signal adapter, 4 capacitor
5 current limiting components
A information source input port C oscillator signal
E logical signal L reference signal
P pulse-width modulation signal
T1 charge period T2 discharges the period
Vcc power supply
The actual speed curve of U1 ~ U4 motor
The desired speed curve of Z motor.
Specific embodiment
For above and other objects, features and advantages of the invention can be clearer and more comprehensible, be cited below particularly it is of the invention compared with
Good embodiment, and cooperate attached drawing, it is described in detail below:
Directional terms described in full text of the present invention, for example, front, back, left, right, up (top), under (bottom), inside and outside, side etc.,
Mostly in reference to the direction of attached drawing, each side's tropism term only to aid in illustrating and understand various embodiments of the present invention, it is non-to
The limitation present invention.
It please refers to shown in Fig. 2, is the circuit diagram of motor system embodiment of the invention.Wherein, which implements
Example may include a motor 1 and a control unit 2, and the control unit 2 and the motor 1 are electrically connected, should to output signal control
The revolving speed of motor 1, such as: shaft rotation speed when motor 1 operates makes the actual speed relation curve of the motor 1 tend to be linear.
Embodiments thereof illustrated below, but not limited to this.
For example, the motor 1 can by the various internal rotor suitable for fan or external-rotor motor as main member,
Such as: DC Brushless Motor (BLDC motor) has a stator (stator) 11, which has a coil module
111, to drive a rotor (rotor, figure are not painted) rotation, driving an impeller for the rotor, (impeller, figure are not drawn
Show) rotation, and generate air-flow.In addition, the control unit 2 can be the device with motor control and driving function, such as: microcontroller
Device (MCU), digital signal processor (DSP) or specific function integrated circuit (ASIC) etc., which can prestore a control
Logic (control logic, such as: hardware circuit or software program) and its required data, the control unit 2 can be fixed with this
The coil module 111 of son 11 is electrically connected, which can be powered by a power Vcc, to control 1 revolving speed of motor, with
The lower electronic building brick for illustrating the control unit 2 and its being electrically connected, the electronic building brick and control unit 2 can integrate a circuit
Plate, and become a part of 1 internal component of motor, but not limited to this.
Referring again to shown in Fig. 2, which can have a level pressure output end 21, base letter input terminal 22, one to vibrate
Connecting pin 23 and a speed control output port 24.The level pressure output end 21 can be used to export certain voltage, such as: 6 volts, the level pressure is defeated
Outlet 21 can be electrically connected with a signal adapter 3, which can be electrically connected with an information source input port A, the information source
An input port A exportable Pulse Width Modulation (PWM) signal P to signal adapter 3(is such as: partial pressure adjustment circuit), signal conversion
Device 3 can by constant voltage that the level pressure output end 21 exports according to duty cycle of pulse-width modulation signal P (duty cycle, such as:
1 ~ 100%) different dividing ratios are formed, to generate a reference signal L, such as: 5 volts of (constant voltage) × 50%(duty cycles)=
2.5 volts (voltage value of reference signal L), the voltage value of reference signal L be one between a range of regulation (such as: 0 to 6
Volt etc.) in DC level voltage value, but not limited to this；In addition, the control unit 2 base letter input terminal 22 can be used to it is defeated
Enter reference signal L, as the foundation for controlling 1 revolving speed of motor.
Referring again to shown in Fig. 2, the oscillation connecting pin 23 of the control unit 2 can be used to input an oscillator signal C or output
Electric current, the oscillation connecting pin 23 can be electrically connected to a ground terminal with a capacitor 4, the oscillation connecting pin 23 and level pressure output end
Can be with a current limiting component 5(such as between 21: resistor) it is electrically connected, to limit the level pressure output end 21 output to the capacitor
4 electric current, when the electric energy stored in the capacitor 4 is lower, the level pressure output end 21 and oscillation connecting pin 23 all it is chargeable extremely
The capacitor 4, when being full of electric energy in the capacitor 4, which can be discharged to the oscillation connecting pin 23, utilize the capacitor
4 repeated charge of device can produce continuous oscillation signal as oscillator signal C, as shown in figure 3, the waveform of oscillator signal C can
With the electric discharge period T2 of a charge period T1 and one, when the maintenance of electric discharge period T2 held time greater than charge period T1
Between, the time scale value range of electric discharge period T2 and charge period T1 can between 1.1 to 4, such as: 1.1,2,3,4, this when
Between proportional region value can be adjusted by the resistance value of the current limiting component 5, such as: the constant voltage of the level pressure output end 21 be 6 volts
Spy, for the voltage value of oscillator signal C between 1 to 4 volt, the resistance value of the current limiting component 5 is chosen as 300 K Ω ~ 700K
Ω, but not limited to this, and the resistance value of the current limiting component 5 is bigger, opposite can improve the electric discharge period T2 of oscillator signal C and fill
The time scale value of electric period T1.Whereby, make the waveform of oscillator signal C can the similar electricity between sawtooth wave and triangular wave
Hold Charge-discharge wave shape, to form the signal with motor rotary speed compensation function, the journey of speed considerations is adjusted for user
Degree, as the foundation for controlling 1 revolving speed of motor, to meet real-world operation demand.
Shown in please refer to figs. 2 and 3 together, the control logic of the control unit 2 can be used for comparing the electricity of reference signal L
The voltage value of pressure value and oscillator signal C, and generate a logical signal E, as: logical signal E can be for high and low level
Pulse wave signal, the control unit 2 can determine whether the voltage value of oscillator signal C is less than the voltage value of reference signal L, if sentencing
It is yes for breaking, and the voltage value of logical signal E is a low level voltage (such as 0.5 volt), if being judged as NO, logical signal E
Voltage value be a high levle voltage (such as 3 volts), when the voltage value of reference signal L is fixed in the range of regulation
Any voltage value when, the voltage value of logical signal E can directly be carried out by the charge and discharge time scale value of oscillator signal C micro-
It adjusts, to control the revolving speed of the motor 1 using the level switching time of logical signal E, such as: logical signal E can be controlled accordingly
The power supply of coil module 111 for making the stator 11 generates the time of magnetic force, to adjust the revolving speed etc. of rotor rotation, but not with this
It is limited；In addition, the speed control output port 24 of the control unit 2 can be electrically connected with the coil module 111 of the stator 11, to export
Speed controling signal of the logical signal E to the coil module 111, as the motor 1.
It please refers to shown in Fig. 4, is the comparison schematic diagram of the different rotating speeds curve of the motor of the embodiment of the present invention.It please one
And as shown in fig.3, wherein, when the time scale value of electric discharge period T2 and charge period T1 is respectively 1.1,2,3,4,
The speed curves of the motor 1 are respectively U1, U2, U3, U4, as seen from the figure, as above-mentioned time scale value gradually increases, the motor
1 speed curves more tend to linearly without being bent, especially, when the time scale value is 4, the speed curves U4 of the motor 1
The linear degree highest of presentation is almost be overlapped with the desired speed curve Z of motor.Therefore, the embodiment of the present invention passes through change
The time scale value of the electric discharge period T2 and charge period T1, can finely tune the actual speed curve of motor really according to demand
Tend to be linear, be not necessarily to additional tach signal compensation circuit, the cost and complexity of motor rotary speed control can be reduced.
It holds, the control unit 2 of the above embodiment of the present invention may compare the voltage value and the oscillator signal of reference signal L
The voltage value of C and generate logical signal E, to control the revolving speed of the motor 1；Wherein, the voltage value of reference signal L according to
The duty cycle of the pulse-width modulation signal converts, and the waveform of oscillator signal C has charge period T1 and electric discharge period
T2, the holding time greater than charge period T1 of holding time of electric discharge period T2.In addition, motor rotary speed of the invention controls
Embodiment of the method can be applied to the control unit 2, and the revolving speed of the motor 1 is regulated and controled for the control unit 2, and step includes:
By the control unit 2 compare reference signal L voltage value and oscillator signal C voltage value and generate logical signal E, use
To control the revolving speed of the rotor of the motor 1；Wherein, the voltage value of reference signal L is according to work week of the pulse-width modulation signal
Phase converts, and the waveform of oscillator signal C has a charge period T1 and electric discharge period T2, when the maintenance of electric discharge period T2
Between holding time greater than charge period T1.
Whereby, the above embodiment of the present invention can simply change the time scale model of electric discharge period T2 Yu charge period T1
Value is enclosed, such as: adjusting the resistance value of the current limiting component 5, be not necessarily to additional tach signal compensation circuit, motor can be adjusted easily
Actual speed curve linear degree, when the time scale value is 4, line that the actual speed curve U4 of the motor 1 is presented
Property degree highest, it is almost Chong Die with desired speed curve, can achieve reduce motor rotary speed control cost and reduce motor turn
Speed control complexity and other effects, may be applicable to various motor rotary speed control circuit, such as: rotation speed of the fan control, it can be into one
Step increases motor use demand amount.
Claims (7)
1. a kind of motor rotation speed control method, which is characterized in that shaken by a level pressure output end of a control unit and one
The both ends that a current limiting component is electrically connected in connecting pin are swung, the oscillation connecting pin and a capacitor are electrically connected to one
The step of ground terminal, the motor rotation speed control method includes:
The current limiting component limits the level pressure output end and exports to the electric current of the capacitor, and the capacitor repeated charge is to generate one
A oscillator signal, the oscillation connecting pin input the oscillator signal；
By the control unit compare a reference signal voltage value and the oscillator signal voltage value and generate logic and believe
Number, control the revolving speed of the motor；
Wherein, the voltage value of the reference signal is converted according to the duty cycle of a pulse-width modulation signal, the oscillator signal
Waveform there is a charge period and an electric discharge period, the electric discharge period to hold time greater than the maintenance of the charge period
Time.
2. motor rotation speed control method as described in claim 1, wherein the control unit judges the voltage value of the oscillator signal
Whether the voltage value of the reference signal is less than, if being judged as YES, the voltage value of the logical signal is a low level voltage, if sentencing
It is no for breaking, and the voltage value of the logical signal is a high levle voltage.
3. motor rotation speed control method as described in claim 1, the wherein time scale of the electric discharge period and the charge period
Value range is between 1.1 to 4.
4. a kind of motor characterized by comprising
One stator has a coil module, drives a rotor rotation；And
One control unit has a level pressure output end, a base letter input terminal, an oscillation connecting pin and a speed control defeated
It goes out of the port, the oscillation connecting pin and a capacitor are electrically connected to a ground terminal, the level pressure output end and the oscillation connecting pin
Between be electrically connected with current limiting component, which exports a constant voltage, which believes that input terminal inputs a base
Calibration signal, the oscillation connecting pin input an oscillator signal, which controls output port and the coil module of the stator is electrically connected, should
Control unit compares the voltage value of the reference signal and the voltage value of the oscillator signal and generates a logical signal, controls this turn
The revolving speed of son；
Wherein, the voltage value of the reference signal is converted according to the duty cycle of a pulse-width modulation signal, the oscillator signal
Waveform there is a charge period and an electric discharge period, the electric discharge period to hold time greater than the maintenance of the charge period
Time.
5. motor as claimed in claim 4, wherein the control unit judges whether the voltage value of the oscillator signal is less than the base
The voltage value of calibration signal, if being judged as YES, the voltage value of the logical signal is a low level voltage, if being judged as NO, this is patrolled
The voltage value for collecting signal is a high levle voltage.
6. motor as claimed in claim 4, wherein the time scale range of the electric discharge period and the charge period between 1.1 to
4。
7. motor as claimed in claim 4 wherein turns between the level pressure output end and an information source input port with a signal
Parallel operation is electrically connected.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105115615A TWI599161B (en) | 2016-05-19 | 2016-05-19 | Motor and revolution speed control method thereof |
| TW105115615 | 2016-05-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107404279A CN107404279A (en) | 2017-11-28 |
| CN107404279B true CN107404279B (en) | 2019-10-25 |
Family
ID=60389396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610377734.0A Active CN107404279B (en) | 2016-05-19 | 2016-05-31 | motor and rotating speed control method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107404279B (en) |
| TW (1) | TWI599161B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004867B (en) * | 2018-08-09 | 2020-06-05 | 珠海格力电器股份有限公司 | Control signal adjusting device, motor and rotating speed adjusting method thereof |
| CN110595552B (en) * | 2019-10-15 | 2021-03-16 | 王元西 | Method for non-magnetic acquisition of displacement and angular velocity of planar winding coil |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913333A (en) * | 2005-08-11 | 2007-02-14 | 台达电子工业股份有限公司 | Drive device of fan moter |
| CN101471619A (en) * | 2007-12-28 | 2009-07-01 | 台达电子工业股份有限公司 | Drive circuit and drive method for motor |
| CN101572523A (en) * | 2008-06-13 | 2009-11-04 | 崇贸科技股份有限公司 | Control circuit and control method for brushless DC motor |
| CN102223118A (en) * | 2010-04-19 | 2011-10-19 | 昆山广兴电子有限公司 | Rotation speed control loop of motor |
| CN202026270U (en) * | 2011-02-25 | 2011-11-02 | 讯凯国际股份有限公司 | Fan motor control device |
-
2016
- 2016-05-19 TW TW105115615A patent/TWI599161B/en active
- 2016-05-31 CN CN201610377734.0A patent/CN107404279B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913333A (en) * | 2005-08-11 | 2007-02-14 | 台达电子工业股份有限公司 | Drive device of fan moter |
| CN101471619A (en) * | 2007-12-28 | 2009-07-01 | 台达电子工业股份有限公司 | Drive circuit and drive method for motor |
| CN101572523A (en) * | 2008-06-13 | 2009-11-04 | 崇贸科技股份有限公司 | Control circuit and control method for brushless DC motor |
| CN102223118A (en) * | 2010-04-19 | 2011-10-19 | 昆山广兴电子有限公司 | Rotation speed control loop of motor |
| CN202026270U (en) * | 2011-02-25 | 2011-11-02 | 讯凯国际股份有限公司 | Fan motor control device |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201742367A (en) | 2017-12-01 |
| TWI599161B (en) | 2017-09-11 |
| CN107404279A (en) | 2017-11-28 |
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Effective date of registration: 20210421 Address after: 536000 zone B6, northwest sea export processing zone, Beihai Avenue, Beihai City, Guangxi Zhuang Autonomous Region Patentee after: Beihai jianzhun Electronics Co.,Ltd. Address before: 528251, No. two, 5 South Avenue, Ping Chau, Guangdong, Foshan Patentee before: SUNON ELECTRONICS (FOSHAN) Co.,Ltd. |
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