CN106599581A - Method of frequency converter of simulating eddy current deceleration time - Google Patents
Method of frequency converter of simulating eddy current deceleration time Download PDFInfo
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- CN106599581A CN106599581A CN201611164094.1A CN201611164094A CN106599581A CN 106599581 A CN106599581 A CN 106599581A CN 201611164094 A CN201611164094 A CN 201611164094A CN 106599581 A CN106599581 A CN 106599581A
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
- G16Z99/00—Subject matter not provided for in other main groups of this subclass
Abstract
The present invention discloses a method of a frequency converter of simulating eddy current deceleration time. The method comprises a first step of providing a formula I as shown in the specification, wherein T represents a torque, and f represents a running frequency of the frequency converter; a second step of considering a friction torque in running, and supposing that the friction torque is 3, so as to obtain a formula II as shown in the specification; and a third step of setting a deceleration time of the frequency converter corresponding to a certain frequency as Zeta and running time as t, so as to obtain a formula III as shown in the specification, wherein K1 represents a coefficient, the value of K1 is related to weight and length of a tower arm, and t represents a current running frequency. Time for acceleration and deceleration of different models of motor matched with different specifications of tower crane can be calculated by using variables like torque, speed and time of the variable frequency analog motor in use, so that debugging is convenient.
Description
Technical field
The present invention relates to frequency conversion speed-down technical field, specially a kind of converter simulation vortex deceleration time method.
Background technology
Tower crane rotating part rotary inertia is very big, and because arm support is constantly lengthened, when slowing down in place, long arm roots are decelerated to
Zero, and the linear velocity of long arm end also has larger linear velocity, arm support jitter problem easily occurs during revolution when slowing down in place.
The ways of deceleration for using at present has, and straight line slows down, straight line deceleration+S curve is slowed down and straight line deceleration+turbine
Structure, the rate of change of its cathetus deceleration frequency is a steady state value, and short when deceleration time, arm support shake is bigger, and deceleration time is long, shadow
Production efficiency is rung, and the deceleration of straight line deceleration+S curve debugs difficult when using, poor for applicability, straight line deceleration+swirl flow mechanism is in height
When fast, slowed down using straight line, the rate of change of frequency is a steady state value, during low speed, slowed down using vortex, braking moment is according to large arm
The speed of service and change, so as to reach eliminate tower crane shake while, fast braking, straight line decelerations+swirl flow mechanism applying
During, needing to debug its deceleration time, current technology is without can be with simple and convenient method of testing.
The content of the invention
(1) technical problem for solving
For the deficiencies in the prior art, the invention provides a kind of converter simulation vortex deceleration time method, solves
Currently without a kind of problem of the method that deceleration time can be vortexed with easy test.
(2) technical scheme
For achieving the above object, the present invention provides following technical scheme：A kind of converter simulation vortex deceleration time method,
Comprise the following steps：
S1, formula one：(in formula：T is torque, and f is converter running frequency)；
S2, in view of there is moment of friction in running, it is assumed that moment of friction is 3, obtains formula two：
S3, certain frequency corresponding converter deceleration time is set as ζ, run time is t, obtains formula three：(wherein K1 is coefficient, and K1 values are relevant with the weight of tower arm and length, and t is current operation frequency)；
S4, formula three is substituted into formula two obtain formula four：(according to tower crane 20HZ
～0HZ, actual measurement vortex deceleration time, can calculate K1)；
S5, simulation deceleration time calculate：Formula five：
Preferably, the formula one is obtained by MATLAB softwares according to the data calculation of conventional 24V eddy current voltages control.
Preferably, the K1 values in step S3 can obtain the vortex characteristic curve of different motor models after adjusting.
(3) beneficial effect
The invention provides a kind of converter simulation vortex deceleration time method.Possesses following beneficial effect：
The present invention passes through the variable frequency synthesiser motor variable such as torque, speed and time in use, can calculate not
The motor of same model coordinates the tower crane of different size in the time for accelerating with use needed for moderating process, so that debugging side
Just.
Description of the drawings
Fig. 1 is the vortex characteristic curve chart of motor of the present invention；
Fig. 2 is the change curve of the corresponding Time And Frequency that runs slowly of K1 values of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in Figure 1-2, the present invention provides a kind of technical scheme：A kind of converter simulation vortex deceleration time method, bag
Include following steps：
S1, formula one：(in formula：T is torque, and f is converter running frequency), formula one by
MATLAB softwares are obtained according to the data calculation of conventional 24V eddy current voltages control；
S2, in view of there is moment of friction in running, it is assumed that moment of friction is 3, obtains formula two：
S3, certain frequency corresponding converter deceleration time is set as ζ, run time is t, obtains formula three：(wherein K1 is coefficient, and K1 values are relevant with the weight of tower arm and length, and t is current operation frequency),
K1 values can obtain the vortex characteristic curve of different motor models after adjusting；
S4, formula three is substituted into formula two obtain formula four：(according to tower crane 20HZ
～0HZ, actual measurement vortex deceleration time, can calculate K1)；
S5, simulation deceleration time calculate：Formula five：
To sum up can obtain, the present invention, can be with by the variable frequency synthesiser motor variable such as torque, speed and time in use
The motor for calculating different model coordinates the tower crane of different size in the time for accelerating with use needed for moderating process, so that
Must debug conveniently.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention be defined by the appended.
Claims (3)
1. a kind of converter simulation is vortexed deceleration time method, it is characterised in that comprise the following steps：
S1, formula one：In formula：T is torque, and f is converter running frequency；
S2, in view of there is moment of friction in running, it is assumed that moment of friction is 3, obtains formula two：
S3, certain frequency corresponding converter deceleration time is set as ζ, run time is t, obtains formula three：Wherein K1 is coefficient, and K1 values are relevant with the weight of tower arm and length, and t is current operation frequency；
S4, formula three is substituted into formula two obtain formula four：(according to tower crane 20HZ～
0HZ, actual measurement vortex deceleration time, can calculate K1)；
S5, simulation deceleration time calculate：Formula five：
2. a kind of converter simulation according to claim 1 is vortexed deceleration time method, it is characterised in that：The formula one
Obtained according to the data calculation of conventional 24V eddy current voltages control by MATLAB softwares.
3. a kind of converter simulation according to claim 1 is vortexed deceleration time method, it is characterised in that：Step S3
In K1 values adjust after can obtain the vortex characteristic curve of different motor models.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611164094.1A CN106599581B (en) | 2016-12-15 | 2016-12-15 | A kind of frequency converter simulation vortex deceleration time method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611164094.1A CN106599581B (en) | 2016-12-15 | 2016-12-15 | A kind of frequency converter simulation vortex deceleration time method |
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| CN106599581A true CN106599581A (en) | 2017-04-26 |
| CN106599581B CN106599581B (en) | 2019-05-14 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10314999A (en) * | 1997-05-13 | 1998-12-02 | Toyooki Kogyo Co Ltd | Hydraulic pressurized machining device |
| CN103856066A (en) * | 2014-01-18 | 2014-06-11 | 江西江特电气集团有限公司 | Torque control method of frequency converter |
| CN104713201A (en) * | 2015-04-09 | 2015-06-17 | 宁波奥克斯电气有限公司 | Control method for operation frequency of variable-frequency air conditioning unit |
-
2016
- 2016-12-15 CN CN201611164094.1A patent/CN106599581B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10314999A (en) * | 1997-05-13 | 1998-12-02 | Toyooki Kogyo Co Ltd | Hydraulic pressurized machining device |
| CN103856066A (en) * | 2014-01-18 | 2014-06-11 | 江西江特电气集团有限公司 | Torque control method of frequency converter |
| CN104713201A (en) * | 2015-04-09 | 2015-06-17 | 宁波奥克斯电气有限公司 | Control method for operation frequency of variable-frequency air conditioning unit |
Non-Patent Citations (2)
| Title |
|---|
| 季必玉等: "西门子变频器参数设置的探讨", 《电气开关》 * |
| 顾海强等: "通用变频器加减速方式的研究与实现", 《电机与控制应用》 * |
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