CN102255488A - Frequency converter stopping device - Google Patents
Frequency converter stopping device Download PDFInfo
- Publication number
- CN102255488A CN102255488A CN2011101926530A CN201110192653A CN102255488A CN 102255488 A CN102255488 A CN 102255488A CN 2011101926530 A CN2011101926530 A CN 2011101926530A CN 201110192653 A CN201110192653 A CN 201110192653A CN 102255488 A CN102255488 A CN 102255488A
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- frequency converter
- buffer
- optocoupler
- resistance
- arresting gear
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Abstract
The invention discloses a frequency converter stopping device, which comprises at least two buffers and at least two manual switch units, wherein the buffers are connected between a logic control circuit of a frequency converter and an inverter drive circuit after being connected in series; the enabling end of each buffer is connected to a first voltage source by a first resistor; each manual switch unit is connected to a joint of a corresponding buffer and a corresponding resistor; the manual switch units are interlocked; and levels output to the enabling ends of the buffers by the first voltage source are converted by the switching of the manual switch units to control the enabling validity of the buffers. The frequency converter stopping device is provided with at least two hardware control channels for controlling the stoppage of the frequency converter, and can reliably switch a switching device of an inverter off to stop running the frequency converter under the condition of not switching power off to effectively prevent the abnormal starting of a motor and ensure the personal safety of an operator.
Description
Technical field
The invention belongs to the converter technology field, refer in particular to a kind of device that is used to stop the frequency converter running.
Background technology
In the course of work, usually need frequency converter set on it is carried out shutdown operation to stop the running of production equipment, for the operation of carrying out feeding etc. and so in the staff such as production equipments such as cutting machine, Digit Control Machine Tool, flow production lines.Common ground, the stopping of frequency converter/starting command is provided with software mode by single passage by input equipments such as frequency converter keyboard, user's outside connected switches, there is following defective: after motor stops, the output of frequency converter and motor still exist and are electrically connected, because the electromagnetic environment of frequency converter is comparatively abominable, the action command of frequency converter may be subjected to the interference of electric equipment on every side, causes the unexpected startup of motor, exists injury staff's danger.
In order to overcome above-mentioned defective, can after shutting down, frequency converter cut off the power supply of frequency converter more simultaneously, guaranteeing staff's personal safety, but the operation of cutting off the power supply continually/power on, influence the useful life of production efficiency and frequency converter.
In addition, on the band brake apparatus of some production equipment (for example cutting machine), normally used is frequency converter output relay able to programme, controls by single passage with software mode, when software enters a certain device failure of endless loop or control channel, the possibility of band-type brake control fails increases greatly.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of frequency converter arresting gear, and it can turn-off frequency converter reliably.
For solving the problems of the technologies described above, the present invention adopts technical scheme as described below: a kind of frequency converter arresting gear, it includes at least two buffers and at least two hand switches, wherein, insert between the logic control circuit and inverter driving circuit of frequency converter after each buffer series connection, the Enable Pin of each buffer is connected in one first voltage source by one first resistance separately; Each hand switch unit is connected in the tie point of the corresponding buffers and first resistance, and interlock is provided with between each hand switch unit; Change the height that described first voltage source exports the level of buffer Enable Pin to by the switch of described hand switch unit, to control whether effectively enabling of described buffer.
In the above-mentioned frequency converter arresting gear; each hand switch unit includes one first optocoupler; the input anode of described first optocoupler is connected with one second voltage source; and input cathode is in series with one first switch; the output head anode of described first optocoupler is connected in the tie point of the corresponding buffers and first resistance; and negative pole of output end ground connection, interlock is provided with and constitutes a linked switch between each first switch.
In the above-mentioned frequency converter arresting gear, the other end of described first switch is connected in the common port of frequency converter.
In the above-mentioned frequency converter arresting gear, the input of described first optocoupler is in series with one second resistance.
In the above-mentioned frequency converter arresting gear, have access to one first diode between the Enable Pin of each first resistance and corresponding buffers, the positive pole of described first diode is connected with first resistance, and negative pole then is connected with the Enable Pin of buffer.
In the above-mentioned frequency converter arresting gear, draw a software control terminal, supply in the usefulness of software control circuit access, with whether effectively enabling of controller buffer from the Enable Pin place of each buffer.
In the above-mentioned frequency converter arresting gear, described buffer is the buffer that low level enables, and linked switch is a normally closed switch.
In the above-mentioned frequency converter arresting gear; described frequency converter arresting gear also includes a band-type brake control unit; be used for enabling to start band brake apparatus in invalid at buffer; described band-type brake control unit includes at least two second optocouplers; each second optocoupler is connected with an electromagnetic relay by a triode; wherein; the input anode of second optocoupler is connected in described first voltage source by described first resistance; the input cathode ground connection behind one the 3rd resistance of connecting; output head anode is connected in described electromagnetic relay) coil electrode; negative pole of output end is then connected and is connected in the base stage of described triode behind one the 4th resistance; the collector electrode of described triode is connected with the coil negative pole of described electromagnetic relay; emitter then connects the common port of frequency converter; the coil electrode of described electromagnetic relay connects a tertiary voltage source, and the contact of each electromagnetic relay is in parallel and insert in band brake apparatus.
In the above-mentioned frequency converter arresting gear, draw a software control terminal, in the usefulness of software control circuit access, whether with the conducting of controlling second optocoupler from the input anode of each second optocoupler.
In the above-mentioned frequency converter arresting gear, between each second optocoupler and corresponding first resistance, insert a second switch.
Useful technique effect of the present invention is: this frequency converter arresting gear is formed with two-way at least and is used for the hardware controls passage that the control of conversion device is shut down; can be under the situation of not cutting off the electricity supply; turn-off the switching device of inverter reliably and frequency converter is shut down; prevent the unusual startup of motor effectively, guarantee operating personnel's personal safety.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
For making those of ordinary skill in the art be expressly understood the purpose, technical solutions and advantages of the present invention more, the present invention is further elaborated below in conjunction with drawings and Examples.
Frequency converter arresting gear disclosed in this invention can be applicable on the production equipment such as cutting machine, numerically controlled lathe etc., to stop the running of frequency converter reliably.With reference to shown in Figure 1; this frequency converter arresting gear includes two buffers 10; insert after 10 series connection of two buffers between the logic control element L (for example DSP microprocessor) and inverter driving circuit D (for example IGBT drives optocoupler) in frequency converter; like this; can by control arbitrary buffer 10 enable invalid; cut-out is delivered to the drive signal of this inverter driving circuit D by this logic control element L, turn-offs the switching device of inverter and stops the running of frequency converter.
The Enable Pin of each buffer 10 is connected in one first voltage source 12 by one first resistance 11, and two hand switch unit 13 are connected between each buffer 10 and corresponding first resistance 11 separately, and interlock is provided with between the two hand switch unit 13, change the height that first voltage source 12 exports the level of buffer 10 Enable Pins to by the switch of this hand switch unit 13, thereby control whether effectively enabling of described buffer 11.
For reaching the purpose of electrical isolation, hand switch unit 13 makes up based on optocoupler, as shown in the figure, each hand switch unit 13 includes one first optocoupler 14, the input anode of first optocoupler 14 is connected with one second voltage source 15, and its input cathode is in series with one first switch 16, the other end of this first switch 16 is connected in the common port COM of frequency converter, and the output head anode of first optocoupler 14 is connected in the tie point between the corresponding buffers 10 and first resistance 11, and negative pole of output end ground connection.Usually, be in series with one second resistance 17,, avoid electric current on the input loop excessive and damage first optocoupler 14 to play the effect of current limliting in the input of this first optocoupler 14.Interlock is provided with and constitutes a linked switch between each first switch 16, by the switching manipulation of this linked switch, and can realize the conducting of two first optocouplers 14 simultaneously or ends.
In the embodiment shown in the figures, the buffer that buffer 10 adopts low level to enable, and linked switch is set to normally closed switch.When frequency converter is in normal operating conditions, the linked switch closure, 14 conductings of first optocoupler, first voltage source, 12 output low levels are to buffer 10, buffer 10 enables effectively, and the drive signal that comes from logic control circuit L is sent into inverter driving circuit D by buffer 10; And when needs stop frequency converter, press linked switch and disconnect this first optocoupler 14, first voltage source, 12 output high level are to buffer 10, it is invalid that buffer 10 enables, its output output low level and turn-off the switching device of inverter, the drive signal that comes from logic control circuit L can't drive inverter work by buffer 10, thereby stops the running of frequency converter.Because two buffers 10 are for being connected in series, so, as long as there is a buffer 10 to enable the invalid shutdown that can realize frequency converter.Really, in other embodiment, the buffer that buffer 10 also can adopt high level to enable, correspondingly, linked switch is set to normal open switch.
Have access to one first diode 18 between the Enable Pin of each first resistance 11 and corresponding buffers 10, the positive pole of this first diode 18 is connected with this first resistance 12, and negative pole then is connected with the Enable Pin of buffer 10.
Preferably; draw a software control terminal 19 from the Enable Pin place of each buffer 10; it supplies in the usefulness of software control circuit access; to come whether effectively enabling of controller buffer 10 by software mode; like this; employing software control mode combined with hardware control mode realizes the shutdown of frequency converter, has improved the reliability of shutdown operation.
This frequency converter arresting gear also includes a band-type brake control unit 20, is used for enabling to start band brake apparatus in invalid at buffer 10, to realize promptly stopping as the motor of frequency converter output loading.This band-type brake control unit 20 includes two second optocouplers 21, each second optocoupler 21 is connected with an electromagnetic relay 23 by a triode 22, wherein, the input anode of second optocoupler 21 is connected in first voltage source 12 by first resistance 11, input cathode series connection one is used for the 3rd resistance 24 back ground connection of current limliting, output head anode is connected in the coil electrode of electromagnetic relay 23, negative pole of output end is then connected and is connected in the base stage of triode 22 behind one the 4th resistance 25, the collector electrode of triode 22 is connected with the coil negative pole of electromagnetic relay 23, emitter then meets the common port COM of frequency converter, and the coil electrode of this electromagnetic relay 23 connects a tertiary voltage source 26.Insert in band brake apparatus after the contact parallel connection of each electromagnetic relay 23.First optocoupler 14 disconnect and make buffer 10 enable invalid in, second optocoupler, 21 conductings and make the input circuit closure of electromagnetic relay 23, relay coil adhesive and start the band brake apparatus action.
Preferably, with the conducting of controlling second optocoupler 21 by the software control mode whether to draw a software control terminal 27 from the input anode of each second optocoupler 21, it is in the usefulness of software control circuit access,, thereby can start band brake apparatus, realize promptly stopping of motor.So, adopt software control mode combined with hardware control mode to start band brake apparatus, improved the reliability of band-type brake operation.
Preferably; have access to a second switch 28 in each second optocoupler 21 with corresponding first resistance 11; in the not high use occasion of security requirement; can disconnect each second switch 28 and band-type brake control unit 20 is not come into force with the shutdown operation of frequency converter, improve the compatibility of this frequency converter arresting gear.
In the foregoing description; form two-way hardware controls passage to carry out the shutdown control of frequency converter by the buffers 10 of two series connection and 14 corresponding connections of two first optocouplers; apparently, also can adopt the more buffer 10 of number and first optocoupler 14 to constitute the more hardware controls passage of way.In like manner, band-type brake control unit 20 also can select for use plural second optocoupler 21, electromagnetic relay 23 to constitute plural band-type brake control channel.
In the embodiment shown in the figures, first optocoupler 14 and second optocoupler 21 all adopt the optocoupler that is made of light-emitting diode and phototriode, really, it also can select other suitable optocoupler, for example optocouplers that is made of light-emitting diode and photodiode for use.
The above only is the preferred embodiments of the present invention, but not the present invention is done any pro forma restriction.Those skilled in the art can impose various changes that are equal to and improvement on the basis of the foregoing description, all equivalent variations or modifications of being done in the claim scope all should fall within protection scope of the present invention.
Claims (10)
1. a frequency converter arresting gear is characterized in that, described frequency converter arresting gear includes:
At least two buffers (10), insert after each buffer (10) series connection between the logic control circuit (L) and inverter driving circuit (D) in frequency converter, the Enable Pin of each buffer (10) is connected in one first voltage source (12) by one first resistance (11) separately;
At least two hand switch unit (13), each hand switch unit (13) are connected in the tie point of corresponding buffers (10) and first resistance (11), and interlock is provided with between each hand switch unit (13);
Change the height that described first voltage source (12) exports the level of buffer (10) Enable Pin to by the switch of described hand switch unit (13), to control whether effectively enabling of described buffer (10).
2. frequency converter arresting gear as claimed in claim 1; it is characterized in that; each hand switch unit (13) includes one first optocoupler (14); the input anode of described first optocoupler (14) is connected with one second voltage source (15); and input cathode is in series with one first switch (16); the output head anode of described first optocoupler (14) is connected in the tie point of corresponding buffers (10) and first resistance (11); and negative pole of output end ground connection, interlock is provided with and constitutes a linked switch between each first switch (16).
3. require 2 described frequency converter arresting gears as claim, it is characterized in that, the other end of described first switch (16) is connected in the common port (COM) of frequency converter.
4. frequency converter arresting gear as claimed in claim 2 is characterized in that, the input of described first optocoupler (14) is in series with one second resistance (17).
5. frequency converter arresting gear as claimed in claim 1; it is characterized in that; between the Enable Pin of each first resistance (11) and corresponding buffers (10), have access to one first diode (18); the positive pole of described first diode (18) is connected with first resistance (11), and negative pole then is connected with the Enable Pin of buffer (10).
6. frequency converter arresting gear as claimed in claim 1 is characterized in that, draws a software control terminal (19) from the Enable Pin place of each buffer (10), supplies in the usefulness of software control circuit access, with whether effectively enabling of controller buffer (10).
7. frequency converter arresting gear as claimed in claim 2 is characterized in that, the buffer that described buffer (10) enables for low level, and linked switch is a normally closed switch.
8. frequency converter arresting gear as claimed in claim 1; it is characterized in that; described frequency converter arresting gear also includes a band-type brake control unit (20); be used for enabling to start band brake apparatus in invalid at buffer (10); described band-type brake control unit (20) includes at least two second optocouplers (21); each second optocoupler (21) is connected with an electromagnetic relay (23) by a triode (22); wherein; the input anode of second optocoupler (21) is connected in described first voltage source (12) by described first resistance (11); input cathode one the 3rd resistance (24) the back ground connection of connecting; output head anode is connected in the coil electrode of described electromagnetic relay (23); negative pole of output end is then connected and is connected in the base stage of described triode (22) behind one the 4th resistance (25); the collector electrode of described triode (22) is connected with the coil negative pole of described electromagnetic relay (23); emitter then connects the common port (COM) of frequency converter; the coil electrode of described electromagnetic relay (23) connects a tertiary voltage source (26), and the contact of each electromagnetic relay (23) is in parallel and insert in band brake apparatus.
9. with the conducting of controlling second optocoupler (21) whether frequency converter arresting gear as claimed in claim 8 is characterized in that, draws a software control terminal (27) from the input anode of each second optocoupler (21), in the usefulness of software control circuit access.
10. frequency converter arresting gear as claimed in claim 8 is characterized in that, inserts a second switch (28) between each second optocoupler (21) and corresponding first resistance (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110192653 CN102255488B (en) | 2011-07-11 | 2011-07-11 | Frequency converter stopping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110192653 CN102255488B (en) | 2011-07-11 | 2011-07-11 | Frequency converter stopping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102255488A true CN102255488A (en) | 2011-11-23 |
| CN102255488B CN102255488B (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110192653 Active CN102255488B (en) | 2011-07-11 | 2011-07-11 | Frequency converter stopping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102255488B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038188A (en) * | 2013-03-08 | 2014-09-10 | 控制技术有限公司 | Apparatus For Preventing Output Of Input Signal, Apparatus Providing Output Voltage To Driving Motor And Motor Driving System |
| CN104626164A (en) * | 2013-11-14 | 2015-05-20 | 沈阳新松机器人自动化股份有限公司 | Motor band-type brake control device of industrial robot |
| CN105629805A (en) * | 2014-10-28 | 2016-06-01 | 乐星产电(无锡)有限公司 | Safety stop device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006115556A (en) * | 2004-10-12 | 2006-04-27 | Kayaba Ind Co Ltd | Motor drive circuit and buffer |
| CN200956560Y (en) * | 2006-08-29 | 2007-10-03 | 盛永富 | AC motor CW/CCW rotation control relay module |
-
2011
- 2011-07-11 CN CN 201110192653 patent/CN102255488B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006115556A (en) * | 2004-10-12 | 2006-04-27 | Kayaba Ind Co Ltd | Motor drive circuit and buffer |
| CN200956560Y (en) * | 2006-08-29 | 2007-10-03 | 盛永富 | AC motor CW/CCW rotation control relay module |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038188A (en) * | 2013-03-08 | 2014-09-10 | 控制技术有限公司 | Apparatus For Preventing Output Of Input Signal, Apparatus Providing Output Voltage To Driving Motor And Motor Driving System |
| GB2511564A (en) * | 2013-03-08 | 2014-09-10 | Control Tech Ltd | Fail safe circuit |
| US9209718B2 (en) | 2013-03-08 | 2015-12-08 | Control Techniques Limited | Fail safe circuit |
| CN104038188B (en) * | 2013-03-08 | 2017-09-22 | 尼得科控制技术有限公司 | Prevent the device of input signal output, the device and motor driven systems of output voltage are provided for motor |
| GB2511564B (en) * | 2013-03-08 | 2020-05-27 | Nidec Control Techniques Ltd | Fail Safe Circuit |
| CN104626164A (en) * | 2013-11-14 | 2015-05-20 | 沈阳新松机器人自动化股份有限公司 | Motor band-type brake control device of industrial robot |
| CN105629805A (en) * | 2014-10-28 | 2016-06-01 | 乐星产电(无锡)有限公司 | Safety stop device |
| CN105629805B (en) * | 2014-10-28 | 2019-11-05 | 乐星产电(无锡)有限公司 | Safe stopping devices |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102255488B (en) | 2013-11-06 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20111123 Assignee: Suzhou INVT Electric Equipment Co. Ltd. Assignor: Shenzhen Yingweiteng Electric Co., Ltd. Contract record no.: 2014440020065 Denomination of invention: Frequency converter stopping device Granted publication date: 20131106 License type: Exclusive License Record date: 20140226 |
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| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Suzhou INVT Electric Equipment Co. Ltd. Assignor: Shenzhen Yingweiteng Electric Co., Ltd. Contract record no.: 2014440020065 Date of cancellation: 20150330 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20111123 Assignee: INVT POWRE ELECTRONICS (SUZHOU) CO., LTD. Assignor: Shenzhen Yingweiteng Electric Co., Ltd. Contract record no.: 2015440020101 Denomination of invention: Frequency converter stopping device Granted publication date: 20131106 License type: Exclusive License Record date: 20150330 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |