CN105186932A - Method for controlling start rotating speed of DC motor - Google Patents
Method for controlling start rotating speed of DC motor Download PDFInfo
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- CN105186932A CN105186932A CN201410226470.XA CN201410226470A CN105186932A CN 105186932 A CN105186932 A CN 105186932A CN 201410226470 A CN201410226470 A CN 201410226470A CN 105186932 A CN105186932 A CN 105186932A
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Abstract
The invention discloses a method for controlling the start rotating speed of a DC motor, and solves a technical problem of big noises caused by the extremely high start rotating speed of a conventional motor, and a technical problem that the motor is liable to be damaged. The method comprises the steps: S110, transmitting a PWM pulse with the duty ratio P0% to the DC motor; S120, judging whether the DC is started or not, gradually increasing the duty ratio of the PWM pulse till the motor is started if the DC motor is not started, or gradually increasing the duty ratio of the PWM pulse till P1% and maintaining the duty ratio for certain time, and then increasing the duty ratio of the PWM pulse till the motor is started. The method carries out the starting of the motor through a motor of gradually approaching a starting voltage, can be suitable for the starting of different loads or different types of motors, and solves a problem that the excessive rising of the starting voltage causes damages to the motor.
Description
Technical field
The present invention relates to machine field, particularly a kind of direct current machine starts method for controlling number of revolution.
Background technology
The usual way of startup of current direct current machine is that PWM (Pulse-WidthModulation and the pulse-width modulation) pulse directly exporting a fixing duty ratio starts.In addition, start inertia, friction and the motor in order to general different loads, different capacity and different model to overcome, the pwm pulse duty ratio of startup is often larger.
This starting method often produces two kinds of consequences:
1, for different loads, different capacity or different model direct current machine needed for the duty ratio of startup pwm pulse be different, so rotating speed is too large when the pwm pulse of higher duty cycle can cause part electric motor starting, cause producing larger noise.
If 2 direct given pwm pulses compared with big space rate when starting, starting resistor rises too fast, can cause the damage of motor, affect the useful life of motor.
Summary of the invention
There is provided a kind of direct current machine to start method for controlling number of revolution in the embodiment of the present invention, make it possible to the startup dealing with different loads or model motor, solve technical problem when starting resistor rises too fast, motor being caused to damage simultaneously.
For solving the problems of the technologies described above, the embodiment of the present invention provides a kind of direct current machine to start method for controlling number of revolution, comprising:
Step S110: carry duty ratio to be the pwm pulse of P0% to direct current machine;
Step S120: judge whether direct current machine starts, if direct current machine does not start, then increase the duty ratio of pwm pulse gradually to electric motor starting, or increase the duty ratio of pwm pulse again to electric motor starting after certain time after the duty ratio increasing pwm pulse gradually to P1%.
As preferably, method also comprises: step S130: if direct current machine starts, the duty ratio then reducing pwm pulse gradually runs well to direct current machine, or enter operation process rotational speed regulation after the duty ratio certain hour reducing pwm pulse gradually, or enter operation process rotational speed regulation after certain time after the duty ratio reducing pwm pulse gradually to P2%.
The embodiment of the present invention additionally provides another kind of direct current machine and starts method for controlling number of revolution, comprising:
Step S210: carry duty ratio to be the pwm pulse of P0% to direct current machine;
Step S220: judge whether duty ratio is more than or equal to P1%, if not, then performs step S230, if so, then performs step S250;
Step S230: duty ratio is increased p11%;
Step S240: judge whether direct current machine starts, if not, then performs step S245, if so, then performs step S299;
Step S245: judge whether the time T1 set, if not, then return step S220, if so, then perform step S270;
Step S250: output duty cycle is the pwm pulse of P1%, continues to the time T1 of setting;
Step S260: judge whether direct current machine starts, if not, then performs step S270, if so, then performs step S299;
Step S270: duty ratio is increased p12%, and return step S260;
Step S299: enter operation process rotational speed regulation.
As preferably, p12 is less than or equal to p11.
The embodiment of the present invention additionally provides the third direct current machine and starts method for controlling number of revolution, comprising:
Step S310: carry duty ratio to be the pwm pulse of P0% to direct current machine;
Step S320: judge whether duty ratio is more than or equal to P1%, if not, then performs step S330, if so, then performs step S350;
Step S330: duty ratio is increased p11%;
Step S340: judge whether direct current machine starts, if not, then performs step S345, if so, then performs step S380;
Step S345: judge whether the time T1 set, if not, then return step S320, if so, then perform step S370;
Step S350: output duty cycle is the pwm pulse of P1%, continues to the time T1 of setting;
Step S360: judge whether direct current machine starts, if not, then performs step S370, if so, then performs step S380;
Step S370: duty ratio is increased p12%, and return step S360;
Step S380: judge whether duty ratio is greater than P2%, if so, then performs step S390, if not, then performs step S395;
Step S390: duty ratio is reduced p2%;
Step S393: judge whether the time T2 set, if not, then return step S380, if so, then perform step S399;
Step S395: output duty cycle is the pwm pulse of P2%, continues to the time T2 of setting;
Step S399: enter operation process rotational speed regulation.
As preferably, p12 is less than or equal to p11.
The embodiment of the present invention additionally provides a kind of direct current machine and starts revolution speed control device, comprising: power supply, for carrying duty ratio to be the pwm pulse of P0% to direct current machine; Duty cycle adjustment unit 1, for: judge whether direct current machine starts, if direct current machine does not start, then increase the duty ratio of pwm pulse gradually to electric motor starting, or increase the duty ratio of pwm pulse again to electric motor starting after certain time after the duty ratio increasing pwm pulse gradually to P1%.
As preferably, device also comprises: duty cycle adjustment unit 2, for: if direct current machine starts, the duty ratio then reducing pwm pulse gradually runs well to direct current machine, or enter operation process rotational speed regulation after the duty ratio certain hour reducing pwm pulse gradually, or enter operation process rotational speed regulation after certain time after the duty ratio reducing pwm pulse gradually to P2%.
The embodiment of the present invention additionally provides another kind of direct current machine and starts revolution speed control device, and this direct current machine starts revolution speed control device and comprises the module that above-mentioned direct current machine starts method for controlling number of revolution.
Direct current machine of the present invention starts method for controlling number of revolution and comprises: step S110: carry duty ratio to be the pwm pulse of P0% to direct current machine; Step S120: judge whether direct current machine starts, if direct current machine does not start, then increase the duty ratio of pwm pulse gradually to electric motor starting, or increase the duty ratio of pwm pulse again to electric motor starting after certain time after the duty ratio increasing pwm pulse gradually to P1%.The present invention approaches starting resistor mode gradually by use and carries out direct current machine startup, starting resistor can be avoided to rise too fast and cause damage to direct current machine electromagnetism, affect the useful life of direct current machine.
Accompanying drawing explanation
Fig. 1 is the flow chart of the direct current machine startup method for controlling number of revolution of the embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but not as a limitation of the invention.
Fig. 1 is the flow chart of the direct current machine startup method for controlling number of revolution of the embodiment of the present invention, and as shown in Figure 1, the first embodiment of this method specifically comprises the following steps:
Step S110: be the pwm pulse of P0% to direct current machine conveying duty ratio, P0% is a lower dutyfactor value, its role is to, and give a less starting resistor to direct current machine, to prevent, starting resistor is excessive causes damage to motor;
Step S120: judge whether direct current machine starts, if direct current machine does not start, then increase the duty ratio of pwm pulse gradually to electric motor starting, or increase the duty ratio of pwm pulse again to electric motor starting after certain time after the duty ratio increasing pwm pulse gradually to P1%.
Step S130: if direct current machine starts, the duty ratio then reducing pwm pulse gradually runs well to direct current machine, or enter operation process rotational speed regulation after the duty ratio certain hour reducing pwm pulse gradually, or enter operation process rotational speed regulation after certain time after the duty ratio reducing pwm pulse gradually to P2%.
The second embodiment of this method specifically comprises the following steps:
Step S210: carry duty ratio to be the pwm pulse of P0% to direct current machine;
Step S220: judge whether duty ratio is more than or equal to P1%, if not, then performs step S230, if so, then performs step S250;
Step S230: duty ratio is increased p11%;
Step S240: judge whether direct current machine starts, if not, then performs step S245, if so, then performs step S299;
Step S245: judge whether the time T1 set, if not, then return step S220, if so, then perform step S270;
Step S250: output duty cycle is the pwm pulse of P1%, continues to the time T1 of setting;
Step S260: judge whether direct current machine starts, if not, then performs step S270, if so, then performs step S299;
Step S270: duty ratio is increased p12%, and return step S260;
Step S299: enter operation process rotational speed regulation.
Preferably, in above-mentioned each step, p12 is less than or equal to p11.Setting p12 is less than or equal to p11, being pwm pulse in order to be P1% when still failing to start direct current machine at output duty cycle, reducing the duty ratio that direct current machine is each increased.After the pwm pulse duty ratio being delivered to direct current machine reaches P1%, comparatively close to the starting resistor of direct current machine, therefore now without the need to increasing considerably the pwm pulse duty ratio being delivered to direct current machine, trace is only needed to increase pwm pulse duty ratio, just can realize the startup to direct current machine, if increase pwm pulse duty ratio before still keeping, then likely cause pwm pulse duty ratio excessive and damage is caused to motor.
By above-mentioned mode, starting resistor can be avoided to rise too fast and cause damage to direct current machine electromagnetism, affect the useful life of direct current machine, and the direct current machine of different starting resistor can be suitable for.
The third embodiment of this method specifically comprises the following steps::
Step S310: carry duty ratio to be the pwm pulse of P0% to direct current machine;
Step S320: judge whether duty ratio is more than or equal to P1%, if not, then performs step S330, if so, then performs step S350;
Step S330: duty ratio is increased p11%;
Step S340: judge whether direct current machine starts, if not, then performs step S345, if so, then performs step S380;
Step S345: judge whether the time T1 set, if not, then return step S320, if so, then perform step S370;
Step S350: output duty cycle is the pwm pulse of P1%, continues to the time T1 of setting;
Step S360: judge whether direct current machine starts, if not, then performs step S370, if so, then performs step S380;
Step S370: duty ratio is increased p12%, and return step S360;
Step S380: judge whether duty ratio is greater than P2%, if so, then performs step S390, if not, then performs step S395;
Step S390: duty ratio is reduced p2%;
Step S393: judge whether the time T2 set, if not, then return step S380, if so, then perform step S399;
Step S395: output duty cycle is the pwm pulse of P2%, continues to the time T2 of setting;
Step S399: enter operation process rotational speed regulation.
Add the regulating step of pwm pulse duty ratio after direct current machine is started in the step of the present embodiment, can ensureing that direct current machine runs well under the comparatively slow-speed of revolution, solving the direct current machine problem that noise is too large when starting.
Preferably, p12 is less than or equal to p11.
The first direct current machine of the embodiment of the present invention starts revolution speed control device and comprises: power supply, for carrying duty ratio to be the pwm pulse of P0% to direct current machine; Duty cycle adjustment unit 1, for: judge whether direct current machine starts, if direct current machine does not start, then increase the duty ratio of pwm pulse gradually to electric motor starting, or increase the duty ratio of pwm pulse again to electric motor starting after certain time after the duty ratio increasing pwm pulse gradually to P1%.
Preferably, device also comprises: duty cycle adjustment unit 2, for: if direct current machine starts, the duty ratio then reducing pwm pulse gradually runs well to direct current machine, or enter operation process rotational speed regulation after the duty ratio certain hour reducing pwm pulse gradually, or enter operation process rotational speed regulation after certain time after the duty ratio reducing pwm pulse gradually to P2%.
The second direct current machine of the embodiment of the present invention starts revolution speed control device, and it comprises the module starting method for controlling number of revolution for realizing above-mentioned direct current machine.
Below in conjunction with Fig. 1, the control procedure that direct current machine of the present invention starts method for controlling number of revolution is described:
When the rotating speed of target of direct current machine be greater than zero namely need to start direct current machine time, if direct current machine not yet starts, then start t1 timing when receiving enabled instruction, as t1<=T1, every for the duty ratio of pwm pulse signal τ 1 time is increased p11%, until duty ratio reaches higher limit P1%; As t1>T1, if direct current machine starts not yet, then continue the duty ratio that every τ 1 time increases p12%, this higher limit is less than or equal to 100%, until direct current machine starts, after detecting that direct current machine starts, then start t2 timing, as t2<=T2, by every for the duty ratio of pwm pulse signal τ 2 time decreased p2%, lower limit is P2%; As t2>T2, jump out starting algorithm, enter procedure regulation algorithm.
As preferred embodiment, can when t1<=5s, every 100ms time increases by 4% duty ratio pwm pulse signal, higher limit is 36%, as t1>5s, if direct current machine not yet starts, then continuing every 100ms time increases by 0.6% duty ratio pwm pulse, and higher limit is 100%.If detect, direct current machine starts, and as t2<=1s, every 100ms time decreased 6% duty ratio pwm pulse signal, lower limit is 27%.As t2>1s, jump out starting algorithm, enter procedure regulation algorithm, after starting, DC motor speed is about 300rpm.
Above-mentioned P0 should be less than P1, and for just sending the motor of enabling signal, this P0 also can be 0.
The present invention is by increasing the duty ratio of pwm pulse signal in every τ 1 time, use approaches starting resistor mode gradually and carries out direct current machine startup, avoids starting resistor rise too fast and cause damage to direct current machine electromagnetism, affects the useful life of direct current machine.The present invention is defined in the duty ratio increasing pwm pulse signal in the T1 time fast, increases a rational higher limit P1%, makes algorithm can be suitable for the motor of different starting resistor.When within the T1 time, when the duty ratio of pwm pulse signal is P1%, if motor does not start, continue the duty ratio increasing pwm pulse signal, the abnormal conditions that the too large starting resistor of load is excessive can be dealt with, when after electric motor starting, within the T2 time, rapidly the duty ratio of pwm pulse signal is reduced to a rational lower limit P2%, motor is run at lower rotating speed, solves the problem that when starting, noise is too large.
Certainly, be more than the preferred embodiment of the present invention.It should be pointed out that for those skilled in the art, under the prerequisite not departing from its general principles, can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (9)
1. direct current machine starts a method for controlling number of revolution, it is characterized in that, comprising:
Step S110: carry duty ratio to be the pwm pulse of P0% to direct current machine;
Step S120: judge whether described direct current machine starts, if described direct current machine does not start, then increase the duty ratio of described pwm pulse gradually to electric motor starting, or increase the duty ratio of described pwm pulse again to electric motor starting after certain time after the duty ratio increasing described pwm pulse gradually to P1%.
2. direct current machine as claimed in claim 1 starts method for controlling number of revolution, and it is characterized in that, described method also comprises:
Step S130: if described direct current machine starts, the duty ratio then reducing described pwm pulse gradually runs well to described direct current machine, or enter operation process rotational speed regulation after the duty ratio certain hour reducing described pwm pulse gradually, or enter operation process rotational speed regulation after certain time after the duty ratio reducing described pwm pulse gradually to P2%.
3. direct current machine starts a method for controlling number of revolution, it is characterized in that, comprising:
Step S210: carry duty ratio to be the pwm pulse of P0% to direct current machine;
Step S220: judge whether described duty ratio is more than or equal to P1%, if not, then performs step S230, if so, then performs step S250;
Step S230: described duty ratio is increased p11%;
Step S240: judge whether described direct current machine starts, if not, then performs step S245, if so, then performs step S299;
Step S245: judge whether the time T1 set, if not, then return step S220, if so, then perform step S270;
Step S250: output duty cycle is the pwm pulse of P1%, continues to the time T1 of setting;
Step S260: judge whether described direct current machine starts, if not, then performs step S270, if so, then performs step S299;
Step S270: described duty ratio is increased p12%, and returns step S260;
Step S299: enter operation process rotational speed regulation.
4. direct current machine as claimed in claim 3 starts method for controlling number of revolution, and it is characterized in that, p12 is less than or equal to p11.
5. direct current machine starts a method for controlling number of revolution, it is characterized in that, comprising:
Step S310: carry duty ratio to be the pwm pulse of P0% to direct current machine;
Step S320: judge whether described duty ratio is more than or equal to P1%, if not, then performs step S330, if so, then performs step S350;
Step S330: described duty ratio is increased p11%;
Step S340: judge whether described direct current machine starts, if not, then performs step S345, if so, then performs step S380;
Step S345: judge whether the time T1 set, if not, then return step S320, if so, then perform step S370;
Step S350: output duty cycle is the pwm pulse of P1%, continues to the time T1 of setting;
Step S360: judge whether described direct current machine starts, if not, then performs step S370, if so, then performs step S380;
Step S370: described duty ratio is increased p12%, and returns step S360;
Step S380: judge whether described duty ratio is greater than P2%, if so, then performs step S390, if not, then performs step S395;
Step S390: described duty ratio is reduced p2%;
Step S393: judge whether the time T2 set, if not, then return step S380, if so, then perform step S399;
Step S395: output duty cycle is the pwm pulse of P2%, continues to the time T2 of setting;
Step S399: enter operation process rotational speed regulation.
6. direct current machine as claimed in claim 5 starts method for controlling number of revolution, and it is characterized in that, p12 is less than or equal to p11.
7. direct current machine starts a revolution speed control device, it is characterized in that, comprising:
Power supply, for carrying duty ratio to be the pwm pulse of P0% to direct current machine;
Duty cycle adjustment unit 1, for: judge whether described direct current machine starts, if described direct current machine does not start, then increase the duty ratio of described pwm pulse gradually to electric motor starting, or increase the duty ratio of described pwm pulse again to electric motor starting after certain time after the duty ratio increasing described pwm pulse gradually to P1%.
8. direct current machine as claimed in claim 7 starts revolution speed control device, and it is characterized in that, described device also comprises:
Duty cycle adjustment unit 2, for: if described direct current machine starts, the duty ratio then reducing described pwm pulse gradually runs well to described direct current machine, or enter operation process rotational speed regulation after the duty ratio certain hour reducing described pwm pulse gradually, or enter operation process rotational speed regulation after certain time after the duty ratio reducing described pwm pulse gradually to P2%.
9. direct current machine starts a revolution speed control device, it is characterized in that, comprises the module starting method for controlling number of revolution for the direct current machine realized described in any one of claim 3 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410226470.XA CN105186932A (en) | 2014-05-26 | 2014-05-26 | Method for controlling start rotating speed of DC motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410226470.XA CN105186932A (en) | 2014-05-26 | 2014-05-26 | Method for controlling start rotating speed of DC motor |
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| CN105186932A true CN105186932A (en) | 2015-12-23 |
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| CN201410226470.XA Pending CN105186932A (en) | 2014-05-26 | 2014-05-26 | Method for controlling start rotating speed of DC motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130419A (en) * | 2016-07-01 | 2016-11-16 | 珠海格力电器股份有限公司 | DC machine control device, control method, direct current generator and air purifier |
| CN113237189A (en) * | 2021-05-21 | 2021-08-10 | 宁波奥克斯电气股份有限公司 | Direct current motor starting control method and device, air conditioner and computer readable storage medium |
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| JPH10337063A (en) * | 1997-06-05 | 1998-12-18 | Hirohito Sato | Method and device for starting ac electric motor |
| CN101807873A (en) * | 2009-02-17 | 2010-08-18 | 罗姆股份有限公司 | The drive circuit of motor, driving method and cooling device |
| CN103715946A (en) * | 2013-12-19 | 2014-04-09 | 佛山市顺德区美的电热电器制造有限公司 | Motor starting method, motor starting device and motor |
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2014
- 2014-05-26 CN CN201410226470.XA patent/CN105186932A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10337063A (en) * | 1997-06-05 | 1998-12-18 | Hirohito Sato | Method and device for starting ac electric motor |
| CN101807873A (en) * | 2009-02-17 | 2010-08-18 | 罗姆股份有限公司 | The drive circuit of motor, driving method and cooling device |
| CN103715946A (en) * | 2013-12-19 | 2014-04-09 | 佛山市顺德区美的电热电器制造有限公司 | Motor starting method, motor starting device and motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106130419A (en) * | 2016-07-01 | 2016-11-16 | 珠海格力电器股份有限公司 | DC machine control device, control method, direct current generator and air purifier |
| CN106130419B (en) * | 2016-07-01 | 2019-10-01 | 珠海格力电器股份有限公司 | DC machine control device, control method, direct current generator and air purifier |
| CN113237189A (en) * | 2021-05-21 | 2021-08-10 | 宁波奥克斯电气股份有限公司 | Direct current motor starting control method and device, air conditioner and computer readable storage medium |
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