CN102055404A - Non-depressurizing method and system for adjusting motor reverse electromotive force - Google Patents
Non-depressurizing method and system for adjusting motor reverse electromotive force Download PDFInfo
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- CN102055404A CN102055404A CN2010106147016A CN201010614701A CN102055404A CN 102055404 A CN102055404 A CN 102055404A CN 2010106147016 A CN2010106147016 A CN 2010106147016A CN 201010614701 A CN201010614701 A CN 201010614701A CN 102055404 A CN102055404 A CN 102055404A
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Abstract
The invention discloses a non-depressurizing method and system for adjusting motor reverse electromotive, and the system comprises a central control module, a neutral point generation module, a high voltage limit module, a comparing module and an optical isolation module, by adopting a non-depressurizing isolation sampling circuit, on the premises of no voltage division and no loss of any sampling accuracy, the position of a motor rotor (active cell) can be sensed when the motor runs at a slow speed, thus favorable low speed drive characteristic can be acquired, and the driving control requirement of the slow running of the motor can be satisfied.
Description
Technical field
The invention belongs to field of power, relate to a kind of method and system of non-reduction regulation motor inverse electromotive force.
Background technology
There are two kinds of schemes in the existing motor inverse electromotive force that detects:
In the linear electric motors field, general electric moter voltage is very high, at several hectovolts, to last kilovolt, and when low-speed running, the voltage of inverse electromotive force own is very high, at several hectovolts, and and between the target voltage difference very little, might only several volts, cause after dividing potential drop, being difficult to obtain comparative effectiveness preferably.So under prior art, this type of motor is difficult to obtain good low speed control.
Summary of the invention
At the problem that prior art exists, the object of the present invention is to provide a kind of not dividing potential drop to regulate the method and the detection system of motor inverse electromotive force.
For achieving the above object, the system of non-reduction regulation motor inverse electromotive force of the present invention, comprise central control module, neutral point generation module, high-pressure limit module, comparison module and photoelectric isolation module, the neutral point generation module links to each other with motor and generates the neutral point voltage signal; The high-pressure limit module is used for when the inverse electromotive force signal surpasses the extreme voltage signal excess energy being released; Comparison module is used for inverse electromotive force signal after the high-pressure limit resume module and reference voltage signal are compared, and obtains compare result signal; Photoelectric isolation module is used for compare result signal and system's other parts are isolated; Central control module is used to receive compare result signal, and adjusts the given signal of motor according to comparative result, and is consistent with reference voltage signal up to the given signal of motor.
Further, described high-pressure limit module also is connected with a filter capacitor, is used to eliminate inverse electromotive force because the interference that high pressure produces.
Further, described neutral point generation module is the resistance of three Y-connections, and three resistance common connection ends of Y-connection generate neutral point, and the other end of three resistance links to each other with the three-phase of motor respectively.
Further, the inverse electromotive force signal is that the phase voltage of motor deducts neutral point voltage.
Further, also be connected with a plurality of IGBT between described central control module and the motor, central module control IGBT turn-offs or opens the inverse electromotive force of adjusting motor.
Above-mentioned inverse electromotive force regulating system is regulated the method for motor inverse electromotive force, is specially: 1) gather the phase voltage and the neutral point voltage of motor, deduct neutral point voltage with phase voltage then and obtain motor inverse electromotive force signal; 2) reference voltage signal with this inverse electromotive force signal and motor compares, if the inverse electromotive force signal is greater than or less than reference voltage signal, then control reduces or improves inverse electromotive force voltage, repeats above-mentioned steps then and equates with reference voltage up to inverse electromotive force.
Further, the inverse electromotive force that step 1) obtains also needs extreme voltage to compare, if inverse electromotive force during greater than extreme voltage, is released excess energy.
Further, pass through Filtering Processing again through the inverse electromotive force signal of handling of releasing.
Non-reduction regulation motor inverse electromotive force method and system of the present invention, adopt the isolation sample circuit of non-step-down, can be in dividing potential drop not, do not lose under the prerequisite of any sampling precision, perception rotor (mover) position when the motor low cruise, thereby obtain good driven at low speed characteristic, satisfy the controlling and driving requirement of motor low cruise.
Description of drawings
Fig. 1 is the system block diagram of non-reduction regulation motor inverse electromotive force of the present invention;
Fig. 2 is the oscillogram of reference voltage signal of the present invention;
Fig. 3 is the circuit system schematic diagram of of the present invention non-reduction regulation motor inverse electromotive force.
Embodiment
As shown in Figure 1, the system of non-reduction regulation motor inverse electromotive force of the present invention, comprise CPU, neutral point generation module 2, high-pressure limit module 1, filtration module 3, comparison module 4 and photoelectric isolation module 5, neutral point generation module 2 links to each other with motor and generates the neutral point voltage signal; High-pressure limit module 1 is used for when the inverse electromotive force signal surpasses the extreme voltage signal excess energy being released, the restriction maximum differential pressure, and the protection system circuit guarantees that the inverse electromotive force signal of collection can be discerned by CPU.Comparison module 4 is used for inverse electromotive force signal and reference voltage signal after handling through high-pressure limit module 1 are compared, and obtains compare result signal; Reference voltage signal and extreme voltage signal all are pre-set, and wherein the waveform of reference voltage signal as shown in Figure 2.Photoelectric isolation module 5 is used for compare result signal and system's other parts isolation, because system adopts the approaching floatingly relatively design of non-step-down, cause testing circuit itself to have the high pressure of going up kilovolt, so control system need be isolated use; CPU is used to receive compare result signal, and will adjust the given signal (promptly adjusting the inverse electromotive force size) of motor according to comparative result, and is consistent with reference voltage signal up to the given signal of motor.
As shown in Figure 3, neutral point generation module 2 is the resistance of three Y-connections, and three resistance common connection ends of Y-connection generate neutral point, and the other end of three resistance links to each other with the three-phase of motor respectively.The inverse electromotive force of motor is that the phase voltage of three resistance deducts neutral point voltage.High-pressure limit module 1 is that four voltage stabilizing didoe bridge joints form.
Non-reduction regulation motor inverse electromotive force method of the present invention is at first to gather the phase voltage and the neutral point voltage of motor by neutral point generation module 2, deducts neutral point voltage with phase voltage then and obtains motor inverse electromotive force signal; Inverse electromotive force signal and extreme voltage signal are compared, if inverse electromotive force is during greater than extreme voltage, send into comparison module 4 after excess energy released, if inverse electromotive force is less than extreme voltage, the inverse electromotive force signal is directly sent into comparison module 4, comparison module 4 relatively obtains compare result signal with inverse electromotive force signal and reference voltage signal, this compare result signal is sent into CPU through photoelectric isolation module 5 isolation, CPU is according to the device of power controlling as a result that obtains, turn-off or open the inverse electromotive force that reduces or improve motor as IGBT, if detected inverse electromotive force is greater than reference voltage, then reduce inverse electromotive force, if detected inverse electromotive force less than reference voltage, then improves inverse electromotive force; It is consistent with reference voltage up to the inverse electromotive force of motor to repeat above-mentioned steps then.
Because the present invention is a kind of method of brand-new adjusting counter electromotive force of motor, integrates state-of-the-art technology and equipment, has reached the function and the effect that are possessed fully, the measurement of back electromotive force when especially having solved the motor low cruise.These characteristics are that other scheme is difficult to accomplish at present.The present invention is applicable to the control of slowspeed machine, has the property of promoting the use of.
It is to be noted and any distortion of having done according to the specific embodiment of the present invention all do not break away from the scope that spirit of the present invention and claim are put down in writing.
Claims (8)
1. the system of non-reduction regulation motor inverse electromotive force, it is characterized in that, comprise central control module, neutral point generation module, high-pressure limit module, comparison module and photoelectric isolation module, wherein, the neutral point generation module links to each other with motor and generates the neutral point voltage signal;
The high-pressure limit module is used for when the inverse electromotive force signal surpasses the extreme voltage signal excess energy being released;
Comparison module is used for inverse electromotive force signal after the high-pressure limit resume module and reference voltage signal are compared, and obtains compare result signal;
Photoelectric isolation module is used for compare result signal and system's other parts are isolated; And central control module is used to receive compare result signal, adjusts the given signal of motor according to comparative result, and is consistent with reference voltage signal up to the given signal of motor.
2. the system of non-reduction regulation motor inverse electromotive force as claimed in claim 1 is characterized in that, described high-pressure limit module also is connected with a filter capacitor, is used to eliminate inverse electromotive force because the interference that high pressure produces.
3. the system of non-reduction regulation motor inverse electromotive force as claimed in claim 2, it is characterized in that, described neutral point generation module is the resistance of three Y-connections, and three resistance common connection ends of Y-connection generate neutral point, and the other end of three resistance links to each other with the three-phase of motor respectively.
4. the system of non-reduction regulation motor inverse electromotive force as claimed in claim 3 is characterized in that, the inverse electromotive force signal is that the phase voltage of motor deducts neutral point voltage.
5. the system of non-reduction regulation motor inverse electromotive force as claimed in claim 4 is characterized in that, also is connected with a plurality of IGBT between described central control module and the motor, and central module control IGBT turn-offs or open the inverse electromotive force of adjusting motor.
6. the method for regulating the motor inverse electromotive force as each described regulating system of claim 1-5 is specially: 1) gather the phase voltage and the neutral point voltage of motor, deduct neutral point voltage with phase voltage then and obtain motor inverse electromotive force signal; 2) reference voltage signal with this inverse electromotive force signal and motor compares, if the inverse electromotive force signal is greater than or less than reference voltage signal, then control reduces or improves inverse electromotive force voltage, repeats above-mentioned steps then and equates with reference voltage up to inverse electromotive force.
7. the method for adjusting motor inverse electromotive force as claimed in claim 6 is characterized in that, the inverse electromotive force that step 1) obtains also needs extreme voltage to compare, if inverse electromotive force during greater than extreme voltage, is released excess energy.
8. the method for adjusting motor inverse electromotive force as claimed in claim 7 is characterized in that, the inverse electromotive force signal of handling passes through Filtering Processing again through releasing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106147016A CN102055404A (en) | 2010-12-30 | 2010-12-30 | Non-depressurizing method and system for adjusting motor reverse electromotive force |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106147016A CN102055404A (en) | 2010-12-30 | 2010-12-30 | Non-depressurizing method and system for adjusting motor reverse electromotive force |
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| CN2010106147016A Pending CN102055404A (en) | 2010-12-30 | 2010-12-30 | Non-depressurizing method and system for adjusting motor reverse electromotive force |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2478280Y (en) * | 2001-04-05 | 2002-02-20 | 张相军 | Rotor pole position detector of brushless d.c. motor |
| CN1633744A (en) * | 2002-06-21 | 2005-06-29 | 国际商业机器公司 | A control circuit for a sensorless brushless motor |
| WO2005117249A1 (en) * | 2004-05-28 | 2005-12-08 | Rohm Co., Ltd. | Brushless motor drive control circuit and brushless motor device using the same |
| CN1713507A (en) * | 2004-06-15 | 2005-12-28 | 大同股份有限公司 | Rotor position sensor of DC brushless motor |
| CN1829070A (en) * | 2006-03-29 | 2006-09-06 | 北京航空航天大学 | Small armature inductance high-speed permanent-magnet brushless DC motor control system without position sensor |
-
2010
- 2010-12-30 CN CN2010106147016A patent/CN102055404A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2478280Y (en) * | 2001-04-05 | 2002-02-20 | 张相军 | Rotor pole position detector of brushless d.c. motor |
| CN1633744A (en) * | 2002-06-21 | 2005-06-29 | 国际商业机器公司 | A control circuit for a sensorless brushless motor |
| WO2005117249A1 (en) * | 2004-05-28 | 2005-12-08 | Rohm Co., Ltd. | Brushless motor drive control circuit and brushless motor device using the same |
| CN1713507A (en) * | 2004-06-15 | 2005-12-28 | 大同股份有限公司 | Rotor position sensor of DC brushless motor |
| CN1829070A (en) * | 2006-03-29 | 2006-09-06 | 北京航空航天大学 | Small armature inductance high-speed permanent-magnet brushless DC motor control system without position sensor |
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Application publication date: 20110511 |