CN1464633A - Method for controlling starting time of brushless DC motor - Google Patents
Method for controlling starting time of brushless DC motor Download PDFInfo
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- CN1464633A CN1464633A CN02120937A CN02120937A CN1464633A CN 1464633 A CN1464633 A CN 1464633A CN 02120937 A CN02120937 A CN 02120937A CN 02120937 A CN02120937 A CN 02120937A CN 1464633 A CN1464633 A CN 1464633A
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Abstract
The invention relates to a process for controlling the start-up time for brushless DC motor, in particular for automatically regulating the optimized refrigerator starting time by detecting the limiting current comprising, increasing the voltage of the brushless DC motor slowly to a predetermined value, when the operating current of the brushless DC motor rises to a limited current value, shutting down the brushless DC motor and measuring its rising time, keeping the shutting down status of the brushless DC motor for a period of time before starting again, making it working for a longer period of time than the rising time. The invention can be used to extend the lifetime of the motor and improve its reliability.
Description
Technical field
The present invention relates to control method start-up time of brshless DC motor (BLDC) in a kind of mechanical engineering refrigeration or cooling field refrigerator, refrigerator, cooling or the refrigerating plant, particularly relate to a kind of control method start-up time (METHOD FOR CONTROLING brshless DC motor MOTER OFDRIVING TIME) of regulating the brshless DC motor of above-mentioned start-up time by the revolution electric current that detects refrigerator in the best way automatically.
Background technology
Usually, brshless DC motor (BLDC) is applicable in refrigerator and the air-conditioning, can keep the needed indoor temperature of user or maintains under the suitable temperature, so that guarantee the freshness of stored food.Referring now to accompanying drawing, the existing conventional art of this structure is carried out following explanation.
Fig. 1 is illustrated in the schematic diagram of the miniature data processor that is adopted in the control method start-up time of the brshless DC motor of the existing conventional art of utilization, and as shown in the figure, miniature data processor 11 receives the direct voltage of 0V or 5V from the loop of brshless DC motor.
Above-mentioned brshless DC motor uses the carried out voltage of 0V or 5V to switch the F/G signal of (switching), and when exporting the voltage of 5V, above-mentioned brshless DC motor is in operating condition, and when exporting the voltage of 0V, then is in halted state.
Fig. 2 represents to have now the starting characteristic curve chart of traditional brshless DC motor with change in voltage, as shown in the figure, is the brshless DC motor of halted state when making beginning, makes it reach target RPM by increasing voltage in time lentamente.
For the above-mentioned brshless DC motor in the existing conventional art, find out be no more than the rise time required under the situation of current limit when reaching target RPM after, in the concrete time of appointment (740mSec), slowly increase the voltage of brshless DC motor, make its slow startup.
But, in the start-up time of above-mentioned existing traditional brshless DC motor control method, because the difference of the load that the deviation of brshless DC motor and fan are suffered, will be above the revolution electric current of its brshless DC motor, cause to be transfused in the brshless DC motor overcurrent, therefore produce brshless DC motor and start the such defective of fault above current limit.
And, for above-mentioned reasons, will shorten the life-span of brshless DC motor.
This shows that control method start-up time of above-mentioned existing brshless DC motor still has many defectives, and the assistant officer treats further to be improved.
Because the brshless DC motor that the start-up time of above-mentioned existing brshless DC motor, control method existed starts the defective that can produce fault, the lost of life, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, actively studied innovation, in the hope of founding a kind of control method start-up time of new brshless DC motor, can improve general control method start-up time of existing conventional brshless DC motor on the market, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
Technical problem underlying to be solved by this invention is, the brshless DC motor startup that overcomes control method existence start-up time that has traditional brshless DC motor now can produce fault, the defective of the lost of life, and provide a kind of control method start-up time of new brshless DC motor, make its motor running safety, and utilize miniature data processor to detect the revolution electric current of brshless DC motor, can prevent to prevent to import above the electric current of current limit owing to the revolution electric current rising of above-mentioned brshless DC motor and above current limit, so owing to specified current limit for it, thereby can avoid the running of brshless DC motor bad.
Another technical problem to be solved by this invention is, a kind of control method start-up time of brshless DC motor is provided, make it owing to specified the electric current that surpasses current limit of above-mentioned brshless DC motor, therefore life-span of prolonging its motor can be provided, can improve its reliability, and regulate the best low rate start time of brshless DC motor automatically.
The present invention solves its technical problem underlying and realizes by the following technical solutions.Control method start-up time of a kind of brshless DC motor that proposes according to the present invention, it comprises following operating procedure: first step, promptly slowly increase to certain value by the voltage that makes brshless DC motor, and when the revolution electric current of above-mentioned brshless DC motor rises to the current limit value, close above-mentioned brshless DC motor and measure its rise time; Second step promptly after measuring its rise time, makes above-mentioned brshless DC motor stop a period of time, starts again, makes its running be longer than the time of above-mentioned rise time slightly.
The present invention solves its technical problem and can also adopt following technical measures further to realize.
Control method start-up time of aforesaid brshless DC motor, wherein said second step are to carry out start-up operation by the safety value that makes the starting current that flows through above-mentioned brshless DC motor be lower than above-mentioned current limit.
Control method start-up time of aforesaid brshless DC motor, wherein said second step is, judge whether the starting current that flows through above-mentioned brshless DC motor surpasses the safety value of above-mentioned current limit, if its judged result is for having surpassed described safety value, just close above-mentioned brshless DC motor, and make it be lower than the safety value of above-mentioned current limit, start-up operation is longer than the time durations of above-mentioned rise time slightly, till the electric current of above-mentioned brshless DC motor is lower than the safety value starting current of current limit, when increasing the above-mentioned rise time, repeat described second step.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, the invention relates to a kind of control method start-up time of brshless DC motor, especially regulate best start-up time automatically by the revolution electric current of surveying refrigerator.For this reason, the present invention includes following step: slowly increase to certain value by the voltage that makes brshless DC motor, and when the revolution electric current of above-mentioned brshless DC motor rises to the current limit value, close above-mentioned brshless DC motor and measure its rise time; After measuring its rise time, make above-mentioned brshless DC motor stop a period of time, start again, make its running be longer than the time of above-mentioned rise time slightly.Among the present invention, in order to make the motor safety operation, utilize the revolution electric current of miniature data processor, and regulate the required optimum operation time that slowly starts by the detection brshless DC motor.Therefore, can avoid therefore having life-span that prolongs motor and the advantage that can improve its reliability because the revolution electric current of above-mentioned brshless DC motor rises and surpasses the motor failure that current limit took place.
As mentioned above, control method start-up time of brshless DC motor of the present invention, for the safety operation of brshless DC motor, utilize the revolution electric current of miniature data processor, and regulate the required optimum operation time that slowly starts by the detection brshless DC motor.Therefore, can avoid therefore having the advantage that prolongs its motor life and improve its reliability by the starting current rising of above-mentioned brshless DC motor and above the motor failure that is taken place under the situation of current limit.
In sum, control method start-up time of the brshless DC motor of the novel special operational step of the present invention, the brshless DC motor startup that has overcome control method existence start-up time of existing traditional brshless DC motor can produce fault, the defective of the lost of life, make motor running safety, and utilize miniature data processor to detect the starting current of brshless DC motor, can prevent to prevent to import above the electric current of current limit owing to the revolution electric current rising of above-mentioned brshless DC motor and above current limit, so owing to specified current limit for it, thereby can avoid the running of brshless DC motor bad.And owing to specified the electric current that surpasses current limit of above-mentioned brshless DC motor, therefore can provide life-span of prolonging its motor, can improve its reliability, and regulate the best low rate start time of brshless DC motor automatically.It has above-mentioned many advantages and practical value, no matter bigger improvement is all being arranged on the operating procedure or on the function, have large improvement technically, and produced handy and practical effect, and has the effect of enhancement really, thereby being suitable for practicality more, and not seeing have the similar design step to publish or use in like product, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
Concrete control method of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 represent to be applied to existing traditional brshless DC motor start-up time the miniature data processor in the control method schematic diagram.
Fig. 2 represents to have now the starting characteristic curve chart of traditional brshless DC motor with change in voltage.
Fig. 3 represent to be applied to brshless DC motor of the present invention start-up time the miniature data processor in the control method schematic diagram.
Fig. 4 represents the starting characteristic curve chart that existing traditional brshless DC motor changes with voltage, electric current.
Fig. 5 represents to be applied to the oscillogram of voltage and current of the start-up time of the control brshless DC motor among the present invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment thereof, the brshless DC motor (BLDC) that foundation the present invention is proposed start-up time control method concrete control method, operating procedure, feature and effect, describe in detail as after.
See also shown in Figure 3, Fig. 3 represent to be applied to brshless DC motor of the present invention start-up time the miniature data processor in the control method schematic diagram.As shown in the figure, control method start-up time of brshless DC motor of the present invention is identical with existing conventional art haply, but miniature data processor 31 of the present invention can receive the electric current that is input to above-mentioned brshless DC motor, equally with voltage also can detect its electric current.
Fig. 4 represents the curve chart of the starting characteristic that existing traditional brshless DC motor changes with voltage and current, as shown in the figure, its voltage is slowly increased and reaches 15.3V, and its electric current also slowly rises and acquires a certain degree.The present invention utilizes the start-up time of the above-mentioned brshless DC motor of above-mentioned Characteristics Control.
Fig. 5 represents to be applied to the voltage and current oscillogram of the start-up time of the control brshless DC motor among the present invention, as shown in the figure, the voltage of the above-mentioned brshless DC motor that stops before starting is slowly increased, its starting current is also slowly risen with low speed.
At this moment, when above-mentioned voltage slowly is increased to 15.3V in the A during the very first time, by the current limit value of above-mentioned brshless DC motor and the safety value of current limit are input to above-mentioned miniature data processor, and restriction is input to the electric current of above-mentioned miniature data processor.
When reaching the safety value of above-mentioned current limit, just can prolong the life-span of brshless DC motor, and can improve the reliability of its operation.Afterwards, after of short duration dwell time, A prolongs in the second time durations A+ α of certain hour during than the very first time, flows through the electric current of above-mentioned brshless DC motor by reduction, can slowly start brshless DC motor.
Till the electric current of above-mentioned brshless DC motor is lower than the safety value starting current of current limit, aforesaid operations all can repeat always, therefore can not be subjected to the deviation of above-mentioned brshless DC motor and the different influence of load that fan bore, thereby carry out clean boot.
The above, control method start-up time of brshless DC motor of the present invention, it only is the preferred embodiment of invention, be not that the present invention is done any pro forma restriction, any personnel that are familiar with this technology may utilize the technology contents of above-mentioned announcement to be changed or be modified to the equivalent embodiment of equivalent variations, every technical solution of the present invention content that do not break away from,, all still belong in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (3)
1, control method start-up time of a kind of brshless DC motor (BLDC), it is characterized in that it comprises following operating procedure: first step, promptly slowly increase to certain value by the voltage that makes brshless DC motor, and when the revolution electric current of above-mentioned brshless DC motor rises to the current limit value, close above-mentioned brshless DC motor and measure its rise time; Second step promptly after measuring its rise time, makes above-mentioned brshless DC motor stop a period of time, starts again, makes its running be longer than the time of above-mentioned rise time slightly.
2, control method start-up time of brshless DC motor according to claim 1, it is characterized in that wherein said second step is, carries out start-up operation by the safety value that makes the starting current that flows through above-mentioned brshless DC motor be lower than above-mentioned current limit.
3, control method start-up time of brshless DC motor according to claim 1 and 2, it is characterized in that wherein said second step is, judge whether the starting current that flows through above-mentioned brshless DC motor surpasses the safety value of above-mentioned current limit, if its judged result is for having surpassed described safety value, just close above-mentioned brshless DC motor, and make it be lower than the safety value of above-mentioned current limit, start-up operation is longer than the time durations of above-mentioned rise time slightly, till the electric current of above-mentioned brshless DC motor is lower than the safety value starting current of current limit, when increasing the above-mentioned rise time, repeat described second step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02120937A CN1464633A (en) | 2002-06-06 | 2002-06-06 | Method for controlling starting time of brushless DC motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02120937A CN1464633A (en) | 2002-06-06 | 2002-06-06 | Method for controlling starting time of brushless DC motor |
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| CN1464633A true CN1464633A (en) | 2003-12-31 |
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| CN02120937A Pending CN1464633A (en) | 2002-06-06 | 2002-06-06 | Method for controlling starting time of brushless DC motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100409559C (en) * | 2004-04-15 | 2008-08-06 | 罗姆股份有限公司 | Motor drive |
| CN100466455C (en) * | 2005-03-08 | 2009-03-04 | Lg电子株式会社 | Apparatus and method for determining normal start up of sensorless motor |
| CN110266233A (en) * | 2019-06-25 | 2019-09-20 | 阳光电源股份有限公司 | A kind of calculation method and device of asynchronous machine initial speed |
-
2002
- 2002-06-06 CN CN02120937A patent/CN1464633A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100409559C (en) * | 2004-04-15 | 2008-08-06 | 罗姆股份有限公司 | Motor drive |
| CN100466455C (en) * | 2005-03-08 | 2009-03-04 | Lg电子株式会社 | Apparatus and method for determining normal start up of sensorless motor |
| CN110266233A (en) * | 2019-06-25 | 2019-09-20 | 阳光电源股份有限公司 | A kind of calculation method and device of asynchronous machine initial speed |
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