阅读说明：本技术 一种基于变频补偿的触发式变频器 (Frequency conversion compensation-based trigger type frequency converter ) 是由 崔海现 吴海龙 刘国鹰 于 2019-11-06 设计创作，主要内容包括：本发明公开一种基于变频补偿的触发式变频器，包括变频器本体，以及安装在变频器本体上的旋钮，旋钮上固定安装有第一外齿轮，第一外齿轮一侧啮合连接有第二外齿轮，第二外齿轮上固定连接有第一驱动轴，其中第一驱动轴转动安装在变频器本体上，第一驱动轴上固定安装有第一调速从动齿轮和第二调速从动齿轮，第一驱动轴一侧安装有第二驱动轴，第二驱动轴上分别转动安装有第一调速主齿轮和第二调速主齿轮，第一调速主齿轮与第一调速从动齿轮啮合连接，第二调速主齿轮与第二调速从动齿轮啮合连接；当需要调节变频器频率时，驱动低速电机转动，选择性对处于第一调速主齿轮/第二调速主齿轮内侧的电磁铁进行通电，实现变频器输出频率调节。(The invention discloses a frequency conversion compensation-based trigger type frequency converter, which comprises a frequency converter body and a knob arranged on the frequency converter body, wherein a first external gear is fixedly arranged on the knob, one side of the first external gear is engaged and connected with a second external gear, and a first driving shaft is fixedly connected on the second external gear; when the frequency of the frequency converter needs to be adjusted, the low-speed motor is driven to rotate, the electromagnets on the inner sides of the first speed adjusting main gear and the second speed adjusting main gear are selectively electrified, and the output frequency of the frequency converter is adjusted.)

1. The utility model provides a trigger formula converter based on frequency conversion compensation, including converter body (1) to and install knob (10) on converter body (1), a serial communication port, fixed mounting has first external gear (2) of coaxial line on knob (10), first external gear (2) one side meshing is connected with second external gear (21), fixedly connected with coaxial line's first drive shaft (3) is gone up in second external gear (21), wherein first drive shaft (3) rotate and install on converter body (1), fixed mounting has first speed governing driven gear (31) and second speed governing driven gear (32) on first drive shaft (3), second drive shaft (4) are installed to first drive shaft (3) one side, rotate respectively on second drive shaft (4) and install first speed governing master gear (41) and second speed governing master gear (42), first speed governing master gear (41) and first speed governing driven gear (31) meshing are connected, the second speed regulating main gear (42) is meshed with the second speed regulating driven gear (32), wherein the transmission ratio of the meshed connection of the first speed regulating main gear (41) and the first speed regulating driven gear (31) is smaller than the transmission ratio of the second speed regulating main gear (42) and the second speed regulating driven gear (32).

2. The frequency conversion compensation-based trigger type frequency converter according to claim 1, wherein the second driving shaft (4) is provided with a mounting groove (43), a pair of return springs (44) are fixedly mounted in the mounting groove (43), electromagnets (45) are respectively embedded in the mounting grooves (43) at the positions of the return springs (44), and when the electromagnets (45) are electrified, the electromagnets (45) generate magnetic force;

the equal fixed mounting in reset spring (44) top has stopper (46), and stopper (46) are located first speed governing master gear (41) and second speed governing master gear (42) inboard respectively, and magnet has been inlayed in stopper (46) and so forth, and when electro-magnet (45) circular telegram, electro-magnet (45) and magnet repel each other, and spacing groove (401) that the array distributes are all seted up to first speed governing master gear (41) and second speed governing master gear (42) inner wall simultaneously.

3. The frequency-conversion-compensation-based triggered frequency converter according to claim 2, wherein the axis of the second driving shaft (4) is provided with a wiring hole (47) which is communicated with the mounting groove (43) and extends to the outside, and the wiring hole (47) is used for wiring the electromagnet (45).

4. The frequency conversion compensation-based trigger type frequency converter according to claim 3, wherein a third external gear (48) is fixedly mounted on the second driving shaft (4), a fourth external gear (49) is engaged and connected to the outer side of the third external gear (48), the fourth external gear (49) is fixedly connected with an output shaft of the low-speed motor (5), and the low-speed motor (5) is fixedly mounted on the frequency converter body (1).

5. The frequency conversion compensation-based trigger type frequency converter according to claim 4, wherein the trigger type frequency converter further comprises a frequency detector and a PLC controller, the frequency detector is electrically connected with the PLC controller, the frequency detector is used for detecting the actual output frequency of the frequency converter, the PLC controller is electrically connected with the slow motor and the electromagnet (45), and the PLC controller is used for regulating and controlling the slow motor and the electromagnet (45).

6. The triggered frequency converter based on frequency conversion compensation of claim 5, wherein the frequency compensation method comprises the following steps:

1) the PLC controller judges whether the frequency change value is greater than a set threshold value, wherein the frequency change value = | -the actual output frequency of the frequency converter-the set frequency | of the frequency converter, if the PLC controller judges whether the frequency change value is greater than the set threshold value, the PLC controller does not start the slow motor and the electromagnet (45) at all, and the original set output frequency of the frequency converter is kept;

2) if the PLC judges that the frequency change value is larger than a set threshold value, the PLC starts the slow motor and the electromagnet (45) and adjusts the output frequency of the frequency converter, specifically, if the actual output frequency of the frequency converter is larger than the set frequency of the frequency converter, the PLC starts the slow motor and the electromagnet (45) and adjusts the output frequency of the frequency converter, and if the actual output frequency of the frequency converter is smaller than the set frequency of the frequency converter, the PLC starts the slow motor and the electromagnet (45) and adjusts the output frequency of the frequency converter;

3) on the basis that the PLC judges that the frequency variation value is larger than a set threshold value, the PLC also simultaneously judges whether the adjustment deviation is larger than a micro-motion threshold value or not in real time, wherein the adjustment deviation = the variation value-the set threshold value, if the judgment result is negative, the PLC starts a slow-speed motor and an electromagnet (45) corresponding to a first speed regulation main gear (41), at the moment, the output end of the motor enables the first speed regulation main gear (41) to rotate through motion transmission, and then, the knob (10) is subjected to slow fine adjustment, so that the frequency adjustment precision of the frequency converter is more accurate;

if the judgment result is yes, the PLC starts the slow speed motor and the electromagnet (45) corresponding to the second speed regulation main gear (42), and the output end of the motor rotates the second speed regulation main gear (42) through motion transmission, so that the knob (10) is quickly regulated.

Technical Field

The invention belongs to the field of frequency converters, and particularly relates to a frequency conversion compensation-based trigger type frequency converter.

Background

The frequency converter is an electric control device which applies a frequency conversion technology and a microelectronic technology and controls an alternating current motor by changing the frequency mode of a working power supply of the motor.

The frequency converter mainly comprises a rectifying unit (alternating current to direct current), a filtering unit, an inverting unit (direct current to alternating current), a braking unit, a driving unit, a detection unit micro-processing unit and the like. The frequency converter adjusts the voltage and frequency of an output power supply by switching on and off an internal IGBT, provides the required power supply voltage according to the actual requirement of the motor, and further achieves the purposes of energy saving and speed regulation. With the continuous improvement of the industrial automation degree, the frequency converter is also widely applied.

When the frequency converter is used, sometimes, the actual output frequency of the frequency converter and the set frequency of the frequency converter have a jitter deviation due to input voltage fluctuation, and when the deviation is too large, the working stability of equipment (such as a motor) connected with the frequency converter is affected.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a frequency conversion compensation-based trigger type frequency converter, which solves the problem that the actual output frequency of the frequency converter and the set frequency of the frequency converter have jitter deviation caused by input voltage fluctuation in the prior art.

The purpose of the invention can be realized by the following technical scheme:

a frequency conversion compensation-based trigger type frequency converter comprises a frequency converter body and a knob arranged on the frequency converter body, a first external gear of a coaxial line is fixedly arranged on the knob, one side of the first external gear is engaged and connected with a second external gear, a first driving shaft of the coaxial line is fixedly connected on the second external gear, wherein the first driving shaft is rotatably arranged on the frequency converter body, the first driving shaft is fixedly provided with a first speed regulation driven gear and a second speed regulation driven gear, one side of the first driving shaft is provided with a second driving shaft, the second driving shaft is respectively rotatably provided with a first speed regulation main gear and a second speed regulation main gear, the first speed regulation main gear is meshed with the first speed regulation driven gear, the second speed regulation main gear is meshed with the second speed regulation driven gear, the transmission ratio of the meshed connection of the first speed regulating main gear and the first speed regulating driven gear is smaller than that of the second speed regulating main gear and the second speed regulating driven gear.

Furthermore, the second driving shaft is provided with a mounting groove, a pair of return springs are fixedly mounted in the mounting groove, electromagnets are embedded in the mounting grooves at the positions of the return springs, and when the electromagnets are electrified, the electromagnets generate magnetic force.

The equal fixed mounting in reset spring top has the stopper, and the stopper is located first speed governing master gear and second speed governing master gear inboard respectively, and magnet has been inlayed in the stopper, and when the electro-magnet circular telegram, the electro-magnet repels with the magnet, and the spacing groove that the array distributes is all seted up to first speed governing master gear and second speed governing master gear inner wall simultaneously.

Furthermore, the axis of the second driving shaft is provided with a wiring hole which is communicated with the mounting groove and extends to the outer side, and the wiring hole is used for wiring the electromagnet.

Furthermore, a third external gear is fixedly mounted on the second driving shaft, a fourth external gear is meshed and connected with the outer side of the third external gear, the fourth external gear is fixedly connected with an output shaft of the low-speed motor, and the low-speed motor is fixedly mounted on the frequency converter body.

Further, trigger formula converter still includes frequency detector and PLC controller, and through electric connection between frequency detector and the PLC controller, the frequency detector is used for detecting the actual output frequency of converter, through electric connection between PLC controller and slow motor and the electro-magnet, the PLC controller is used for regulating and control slow motor and electro-magnet.

A frequency conversion compensation-based trigger type frequency converter comprises the following steps:

1) the PLC controller judges whether the frequency change value is greater than a set threshold value, wherein the frequency change value = | -the actual output frequency of the frequency converter-the set frequency | of the frequency converter, if the PLC controller judges whether the frequency change value is greater than the set threshold value, the PLC controller does not start the slow speed motor and the electromagnet, and the original set output frequency of the frequency converter is kept;

2) if the PLC judges that the frequency change value is greater than a set threshold value, the PLC starts the slow motor and the electromagnet and adjusts the output frequency of the frequency converter, specifically, if the actual output frequency of the frequency converter is greater than the set frequency of the frequency converter, the PLC starts the slow motor and the electromagnet and adjusts the output frequency of the frequency converter, and if the actual output frequency of the frequency converter is less than the set frequency of the frequency converter, the PLC starts the slow motor and the electromagnet and adjusts the output frequency of the frequency converter;

3) on the basis that the PLC judges that the frequency variation value is larger than a set threshold value, the PLC also simultaneously judges whether the adjustment deviation is larger than a micro-motion threshold value or not in real time, wherein the adjustment deviation = the variation value-the set threshold value, if the judgment result is negative, the PLC starts a slow speed motor and an electromagnet corresponding to a first speed regulation main gear, at the moment, the output end of the motor rotates the first speed regulation main gear through motion transmission, and then performs slow fine adjustment on a knob, so that the frequency adjustment precision of the frequency converter is more accurate;

if the judgment result is yes, the PLC controller starts the slow motor and the electromagnet corresponding to the second speed regulation main gear, and the output end of the motor rotates the second speed regulation main gear through motion transmission, so that the knob is quickly regulated.

The invention has the beneficial effects that:

according to the invention, the PLC is used for starting the slow motor and the electromagnet according to the frequency change value, so that the output frequency of the frequency converter is adjusted; according to the actual demand, the knob is subjected to slow fine adjustment, so that the frequency adjustment precision of the frequency converter is more accurate, or the knob is subjected to fast adjustment, so that the frequency adjustment of the frequency converter is quicker.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is a partial schematic structural view of an embodiment of the present invention;

FIG. 3 is a perspective sectional view of a portion of an embodiment of the present invention;

fig. 4 is an enlarged schematic structural diagram at a in the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and fig. 2, a frequency conversion compensation-based trigger type frequency converter includes a frequency converter body 1, and a knob 10 installed on the frequency converter body 1, wherein the knob 10 is used for adjusting the output frequency of the frequency converter.

A first external gear 2 with a coaxial line is fixedly arranged on the knob 10, one side of the first external gear 2 is engaged and connected with a second external gear 21, a first driving shaft 3 with a coaxial line is fixedly connected on the second external gear 21, wherein the first driving shaft 3 is rotatably mounted on the frequency converter body 1, the first driving shaft 3 is fixedly mounted with a first speed regulation driven gear 31 and a second speed regulation driven gear 32, one side of the first driving shaft 3 is mounted with a second driving shaft 4, the second driving shaft 4 is respectively rotatably mounted with a first speed regulation main gear 41 and a second speed regulation main gear 42, the first speed regulation main gear 41 is engaged with the first speed regulation driven gear 31, the second speed regulation main gear 42 is engaged with the second speed regulation driven gear 32, the transmission ratio of the first speed regulation main gear 41 meshed with the first speed regulation driven gear 31 is smaller than the transmission ratio of the second speed regulation main gear 42 meshed with the second speed regulation driven gear 32.

When the speed regulation device is used, the first speed regulation main gear 41/the second speed regulation main gear 42 are independently rotated, and the first external gear 2 drives the knob 10 to rotate through motion transmission, namely the output frequency of the frequency converter is regulated and controlled;

meanwhile, as the transmission ratio of the meshed connection of the first speed regulation main gear 41 and the first speed regulation driven gear 31 is smaller than the transmission ratio of the second speed regulation main gear 42 and the second speed regulation driven gear 32, namely, when the first speed regulation main gear 41 and the second speed regulation main gear 42 rotate at the same angle in unit time, the first speed regulation main gear 41 drives the knob 10 to rotate at a smaller angle than the second speed regulation main gear 42 drives the knob 10 to rotate at a motion transmission angle, when the frequency amplitude of the frequency converter to be compensated is relatively small, the first speed regulation main gear 41 is rotated to regulate the rotation of the knob 10, so as to realize frequency compensation; when the frequency amplitude of the frequency converter to be compensated is relatively large, the second speed regulation main gear 42 is rotated to rotate the adjusting knob 10, so that the frequency compensation is realized.

As shown in fig. 3 and 4, the second driving shaft 4 is provided with an installation groove 43, a pair of return springs 44 are fixedly installed in the installation groove 43, electromagnets 45 are embedded in the installation grooves 43 at the positions of the return springs 44, and when the electromagnets 45 are electrified, the electromagnets 45 generate magnetic force;

the equal fixed mounting in reset spring 44 top has stopper 46, and stopper 46 is located first speed governing master gear 41 and second speed governing master gear 42 respectively inboard, has inlayed magnet in the stopper 46, and when the electro-magnet 45 circular telegram, electro-magnet 45 repels with the magnet, and the electro-magnet 45 drives stopper 46 and moves the trend towards the outside promptly, and the spacing groove 401 that the array distributes is all seted up to first speed governing master gear 41 and second speed governing master gear 42 inner wall simultaneously.

In the process of rotating the second driving shaft 4, the electromagnet 45 positioned at the inner side of the first speed regulating main gear 41/the second speed regulating main gear 42 is selectively electrified, and due to the repulsion action of the electromagnet 45, the limit block 46 is positioned in the limit groove 401 corresponding to the first speed regulating main gear 41/the second speed regulating main gear 42, so as to complete the selective adjustment of the rotation of the first speed regulating main gear 41/the second speed regulating main gear 42.

A wiring hole 47 communicated with the mounting groove 43 and extending to the outside is formed on the axis of the second drive shaft 4, and the wiring hole 47 is used for wiring the electromagnet 45.

A third external gear 48 is fixedly arranged on the second driving shaft 4, a fourth external gear 49 is meshed and connected with the outer side of the third external gear 48, the fourth external gear 49 is fixedly connected with an output shaft of the low-speed motor 5, and the low-speed motor 5 is fixedly arranged on the frequency converter body 1; when the frequency of the frequency converter needs to be adjusted, the low-speed motor 5 is driven to rotate, the second driving shaft 4 is driven to rotate through motion transmission, the electromagnet 45 on the inner side of the first speed regulation main gear 41/the second speed regulation main gear 42 is selectively electrified, and the output frequency of the frequency converter is adjusted.

The frequency detection device is electrically connected with the PLC, the frequency detection device is used for detecting the actual output frequency of the frequency converter, the PLC is electrically connected with the slow motor and the electromagnet 45, and the PLC is used for regulating and controlling the slow motor and the electromagnet 45.

When the frequency detection device is used, the frequency detector is used for detecting the actual output frequency of the frequency converter, the PLC judges whether the frequency change value is greater than a set threshold value, wherein the frequency change value = | -the actual output frequency of the frequency converter-the frequency converter is set, if the PLC judges whether the frequency change value is greater than the set threshold value, the PLC does not start the slow motor and the electromagnet 45, and the original set output frequency of the frequency converter is kept;

if the PLC judges that the frequency change value is greater than the set threshold value, the PLC starts the slow motor and the electromagnet 45 and adjusts the output frequency of the frequency converter, specifically, if the actual output frequency of the frequency converter is greater than the set frequency of the frequency converter, the PLC starts the slow motor and the electromagnet 45 and adjusts the output frequency of the frequency converter, and if the actual output frequency of the frequency converter is less than the set frequency of the frequency converter, the PLC starts the slow motor and the electromagnet 45 and adjusts the output frequency of the frequency converter;

meanwhile, if the PLC judges that the frequency variation value is larger than a set threshold value, the PLC simultaneously judges whether the adjustment deviation is larger than a micro-motion threshold value or not in real time during the period, wherein the adjustment deviation = the variation value-the set threshold value, if the judgment result is negative, the PLC starts the slow-speed motor and the electromagnet 45 corresponding to the first speed regulation main gear 41, at the moment, the output end of the motor rotates the first speed regulation main gear 41 through motion transmission, and then the knob 10 is subjected to slow fine adjustment, so that the frequency adjustment precision of the frequency converter is more accurate; if the judgment result is yes, the PLC starts the slow speed motor and the electromagnet 45 corresponding to the second speed regulation main gear 42, at the moment, the output end of the motor rotates the second speed regulation main gear 42 through motion transmission, and then the knob 10 is quickly adjusted, so that the frequency of the frequency converter is more quickly adjusted.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.