CN102969972A - Variable-frequency speed control system of motor - Google Patents
Variable-frequency speed control system of motor Download PDFInfo
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- CN102969972A CN102969972A CN2012104356340A CN201210435634A CN102969972A CN 102969972 A CN102969972 A CN 102969972A CN 2012104356340 A CN2012104356340 A CN 2012104356340A CN 201210435634 A CN201210435634 A CN 201210435634A CN 102969972 A CN102969972 A CN 102969972A
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- motor
- frequency converter
- speed
- torque signal
- frequency
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- Control Of Electric Motors In General (AREA)
Abstract
A variable-frequency speed control system of a motor comprises the motor and a frequency converter. When the motor works, the motor is connected with a load. First, rated voltage is exerted onto the motor through the frequency converter to detect the load. Torsion signals transmitted through a motor shaft are transmitted to the frequency converter and compared through a comparer on the frequency converter. If the torsion signals are smaller than the torsion signals corresponding to motor speed at that time, the frequency converter is used for conducting voltage reduction processing. When the torsion signals can reach the torsion signals corresponding to the motor speed, the frequency converter does not conduct voltage reduction processing. When the torsion signals transmitted through the motor shaft are compared with the torsion signals corresponding to the motor speed, the larger the difference is, the larger a voltage reduction amplitude is. Consumed time of a speed control process of the system is generally about one minute, and extra loss of the motor can be reduced as much as possible under the condition that certain load is guaranteed.
Description
Technical field
The present invention is a kind of frequency conversion speed-adjusting system of motor.
Background technology
Motor speed of the prior art is constant, because voltage is invariable, so in case after motor appeared on the scene, its operating state, power output were invariable.In the real work, it is useful that the motor of 100Kw often only has the power of 10Kw, remaining 90% power has all been wasted, such problem lasts for many years always, 30 years up to date, the appearance of variable-frequency governor can realize the requirement of the adaptive load rotating speed of motor, but still there is variety of issue in the mode of frequency control, causes the effect after the frequency control not fully up to expectations.
Summary of the invention
The purpose of this invention is to provide a kind of motor variable-frequency speed-regulating system, can carry out frequency control according to the difference of load.
Purpose of the present invention is come specific implementation by the following technical programs:
A kind of motor variable-frequency speed-regulating system comprises motor and frequency converter, be connected with load in the time of machine operation, at first by frequency converter to rated voltage of motor, detect the size of load; Torque signal by the motor shaft transmission is to frequency converter, compared by the comparator that carries on the frequency converter, if this torque signal is less than the corresponding torque signal of motor speed of this moment, then carrying out step-down by frequency converter processes, until torque signal is when reaching the corresponding torque signal of motor speed, frequency converter no longer carries out step-down to be processed.
When the torque signal that the motor shaft transmission comes and the corresponding torque signal of motor speed compared, gap was larger, and the amplitude of step-down is just larger.
The time that the speed regulation process of this system generally expends is about 1 minute, can guarantee to reduce as far as possible the excess loss of motor in the certain situation of load.
Embodiment
The described a kind of motor variable-frequency speed-regulating system of the embodiment of the invention comprises motor and frequency converter, be connected with load in the time of machine operation, at first by frequency converter to rated voltage of motor, detect the size of load; Torque signal by the motor shaft transmission is to frequency converter, compared by the comparator that carries on the frequency converter, if this torque signal is less than the corresponding torque signal of motor speed of this moment, then carrying out step-down by frequency converter processes, until torque signal is when reaching the corresponding torque signal of motor speed, frequency converter no longer carries out step-down to be processed.
When the torque signal that the motor shaft transmission comes and the corresponding torque signal of motor speed compared, gap was larger, and the amplitude of step-down is just larger.
The time that the speed regulation process of this system generally expends is about 1 minute, can guarantee to reduce as far as possible the excess loss of motor in the certain situation of load.
Claims (2)
1. a motor variable-frequency speed-regulating system is characterized in that, comprises motor and frequency converter, be connected with load in the time of machine operation, at first by frequency converter to rated voltage of motor, detect the size of load; Torque signal by the motor shaft transmission is to frequency converter, compared by the comparator that carries on the frequency converter, if this torque signal is less than the corresponding torque signal of motor speed of this moment, then carrying out step-down by frequency converter processes, until torque signal is when reaching the corresponding torque signal of motor speed, frequency converter no longer carries out step-down to be processed.
2. motor variable-frequency speed-regulating system as claimed in claim 1 is characterized in that, when the torque signal that the motor shaft transmission comes and the corresponding torque signal of motor speed compared, gap was larger, and the amplitude of step-down is just larger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104356340A CN102969972A (en) | 2012-11-05 | 2012-11-05 | Variable-frequency speed control system of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104356340A CN102969972A (en) | 2012-11-05 | 2012-11-05 | Variable-frequency speed control system of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102969972A true CN102969972A (en) | 2013-03-13 |
Family
ID=47799895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104356340A Pending CN102969972A (en) | 2012-11-05 | 2012-11-05 | Variable-frequency speed control system of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102969972A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963256A (en) * | 2019-11-21 | 2020-04-07 | 青岛中加特电气股份有限公司 | Self-adaptive speed regulation control method for conveyor |
| CN113635078A (en) * | 2021-08-23 | 2021-11-12 | 深圳市特力威科技有限公司 | Intelligent numerical control machine tool |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303259A (en) * | 2007-05-11 | 2008-11-12 | 洛阳轴研科技股份有限公司 | Electromagnetic clutch dynamic torque automatic test method and apparatus of automobile air conditioner compressor |
| US20080309282A1 (en) * | 2007-06-18 | 2008-12-18 | Vacon Oyj & Honeywell Acs | Restart control of an A.C. motor drive |
| CN201726357U (en) * | 2009-03-03 | 2011-01-26 | 张军 | Intelligent power-saving control system |
| CN202111658U (en) * | 2011-05-24 | 2012-01-11 | 魏明 | Rotating speed control type frequency converter |
-
2012
- 2012-11-05 CN CN2012104356340A patent/CN102969972A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303259A (en) * | 2007-05-11 | 2008-11-12 | 洛阳轴研科技股份有限公司 | Electromagnetic clutch dynamic torque automatic test method and apparatus of automobile air conditioner compressor |
| US20080309282A1 (en) * | 2007-06-18 | 2008-12-18 | Vacon Oyj & Honeywell Acs | Restart control of an A.C. motor drive |
| CN201726357U (en) * | 2009-03-03 | 2011-01-26 | 张军 | Intelligent power-saving control system |
| CN202111658U (en) * | 2011-05-24 | 2012-01-11 | 魏明 | Rotating speed control type frequency converter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963256A (en) * | 2019-11-21 | 2020-04-07 | 青岛中加特电气股份有限公司 | Self-adaptive speed regulation control method for conveyor |
| CN113635078A (en) * | 2021-08-23 | 2021-11-12 | 深圳市特力威科技有限公司 | Intelligent numerical control machine tool |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130313 |