CN102255488B - Frequency converter stopping device - Google Patents
Frequency converter stopping device Download PDFInfo
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- CN102255488B CN102255488B CN 201110192653 CN201110192653A CN102255488B CN 102255488 B CN102255488 B CN 102255488B CN 201110192653 CN201110192653 CN 201110192653 CN 201110192653 A CN201110192653 A CN 201110192653A CN 102255488 B CN102255488 B CN 102255488B
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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 be used to stopping the frequency converter running.
Background technology
In the course of work of production equipments such as cutting machine, Digit Control Machine Tool, flow production line, 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.Common ground, the stopping of frequency converter/starting command is provided with software mode by single channel by input equipments such as frequency converter keyboard, user's outside connected switches, there is following defective: after motor stops, still there are electrical connection in the output of frequency converter and motor, because the electromagnetic environment of frequency converter is comparatively abominable, the action command of frequency converter may be subject 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 be after frequency converter be shut down, then cut off simultaneously the power supply of frequency converter, guaranteeing staff's personal safety, but the operation of cutting off the power supply continually/power on, affect 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, control by single channel with software mode, enter a certain device failure of endless loop or control channel when software, band-type brake is controlled the possibility that lost efficacy to be increased greatly.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of frequency converter stopping device, 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 stopping device, it includes at least two buffers and at least two hand switches, wherein, access 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 corresponding buffer and the first resistance, and between each hand switch unit, interlock arranges; Switch by described hand switch unit is changed the height that described the first voltage source exports the level of buffer Enable Pin to, to control whether effectively enabling of described buffer.
In above-mentioned frequency converter stopping device; each hand switch unit includes one first optocoupler; the input anode of described the first optocoupler is connected with a second voltage source; and input cathode is in series with one first switch; the output head anode of described the first optocoupler is connected in the tie point of corresponding buffer and the first resistance; and negative pole of output end ground connection, between each first switch, interlock arranges and consists of a linked switch.
In above-mentioned frequency converter stopping device, the other end of described the first switch is connected in the common port of frequency converter.
In above-mentioned frequency converter stopping device, the input of described the first optocoupler is in series with one second resistance.
In above-mentioned frequency converter stopping device, have access to one first diode between the Enable Pin of each first resistance and corresponding buffer, the positive pole of described the first diode is connected with the first resistance, and negative pole is connected with the Enable Pin of buffer.
In above-mentioned frequency converter stopping device, draw a software control terminal from the Enable Pin place of each buffer, in the access of software control circuit, with whether effectively enabling of controller buffer.
In above-mentioned frequency converter stopping device, described buffer is the buffer that low level enables, and linked switch is normally closed switch.
in above-mentioned frequency converter stopping device, described frequency converter stopping device 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 the second optocoupler is connected in described the first voltage source by described the first resistance, ground connection after input cathode series connection one the 3rd resistance, output head anode is connected in described electromagnetic relay) coil electrode, negative pole of output end is connected and is connected in the base stage of described triode after one the 4th resistance, the collector electrode of described triode is connected with the coil negative pole of described electromagnetic relay, emitter connects the common port of frequency converter, the coil electrode of described electromagnetic relay connects a tertiary voltage source, the contact of each electromagnetic relay is in parallel and access in band brake apparatus.
In above-mentioned frequency converter stopping device, draw a software control terminal from the input anode of each the second optocoupler, in the access of software control circuit, with the conducting of controlling the second optocoupler whether.
In above-mentioned frequency converter stopping device, access one second switch between each second optocoupler and corresponding the first resistance.
Useful technique effect of the present invention is: this frequency converter stopping device is formed with two-way at least and is used for controlling the hardware controls passage that frequency converter is shut down; can be in the situation that do not cut off the electricity supply; turn-off reliably the switching device of inverter and frequency converter is shut down; effectively prevent the abnormal startup of motor, 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 more be expressly understood the purpose, technical solutions and advantages of the present invention, the present invention is further elaborated below in conjunction with drawings and Examples.
Frequency converter stopping device disclosed in this invention can be applicable on production equipment such as cutting machine, numerically controlled lathe etc., to stop reliably the running of frequency converter.With reference to shown in Figure 1; this frequency converter stopping device includes two buffers 10; access after two buffer 10 series connection 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 driving signal of this inverter driving circuit D by this logic control element L, turn-off the switching device of inverter and stop 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 the first resistance 11 separately, and between two hand switch unit 13, interlock arranges, by the switch of this hand switch unit 13 and change the height that the first voltage source 12 exports the level of buffer 10 Enable Pins to, thereby control whether effectively enabling of described buffer 11.
For reaching the purpose of electrical isolation, hand switch unit 13 builds based on optocoupler, as shown in the figure, each hand switch unit 13 includes one first optocoupler 14, the input anode of the first optocoupler 14 is connected with a 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 the first optocoupler 14 is connected in the tie point between corresponding buffer 10 and the first resistance 11, and negative pole of output end ground connection.Usually, be in series with one second resistance 17 in the input of this first optocoupler 14, to play the effect of current limliting, avoid electric current on the input loop excessive and damage the first optocoupler 14.Between each first switch 16, interlock arranges and consists of a linked switch, by the switching manipulation of this linked switch, and can realize simultaneously conducting or the cut-off of two the first optocouplers 14.
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, linked switch is closed, the first optocoupler 14 conductings, and the first voltage source 12 output low levels are to buffer 10, buffer 10 enables effectively, and the driving 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, the 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 driving signal that comes from logic control circuit L can't drive inverter work by buffer 10, thereby stops the running of frequency converter.Due to two buffers 10 for being connected in series, therefore, 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 buffer 10, the positive pole of this first diode 18 is connected with this first resistance 12, and negative pole is connected with the Enable Pin of buffer 10.
Preferably; a software control terminal 19 is drawn at Enable Pin place from each buffer 10; it is in the access of software control circuit; 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 stopping device 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 the emergent 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 the second optocoupler 21 is connected in the first voltage source 12 by the first resistance 11, input cathode series connection one is used for the 3rd rear ground connection of resistance 24 of current limliting, output head anode is connected in the coil electrode of electromagnetic relay 23, negative pole of output end is connected and is connected in the base stage of triode 22 after one the 4th resistance 25, the collector electrode of triode 22 is connected with the coil negative pole of electromagnetic relay 23, emitter meets the common port COM of frequency converter, the coil electrode of this electromagnetic relay 23 connects a tertiary voltage source 26.Access in band brake apparatus after the contact parallel connection of each electromagnetic relay 23.The first optocoupler 14 disconnect and make buffer 10 enable invalid in, the second optocoupler 21 conductings and make the input circuit of electromagnetic relay 23 closed, relay coil adhesive and start the band brake apparatus action.
Preferably, with the conducting of controlling the second optocoupler 21 by the software control mode whether to draw a software control terminal 27 from the input anode of each the second optocoupler 21, it is in the access of software control circuit,, thereby can start band brake apparatus, realize the emergent 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 the 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 stopping device.
In above-described embodiment; forming two-way hardware controls passage by the buffers 10 of two series connection and two first 14 corresponding connections of optocoupler controls with the shutdown of carrying out frequency converter; apparently, also can adopt the more buffer 10 of number and the first optocoupler 14 to consist of the more hardware controls passage of way.In like manner, band-type brake control unit 20 also can select plural the second optocoupler 21, electromagnetic relay 23 to consist of plural band-type brake control channel.
In the embodiment shown in the figures, the first optocoupler 14 and the second optocoupler 21 all adopt the optocoupler that is made of light-emitting diode and phototriode, really, it also can select other suitable optocouplers, the optocoupler that for example is made of light-emitting diode and photodiode.
The above is only 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 the various changes that are equal to and improvement on the basis of above-described embodiment, all equivalent variations of doing in the claim scope or modification are within all should falling into protection scope of the present invention.
Claims (9)
1. a frequency converter stopping device, is characterized in that, described frequency converter stopping device includes:
At least two buffers (10), access 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) is connected in the tie point of corresponding buffer (10) and the first resistance (11), between each hand switch unit (13), interlock arranges, each hand switch unit (13) includes one first optocoupler (14), the input anode of described the first optocoupler (14) is connected with a second voltage source (15), and input cathode is in series with one first switch (16), the output head anode of described the first optocoupler (14) is connected in the tie point of corresponding buffer (10) and the first resistance (11), and negative pole of output end ground connection, link setting between each first switch (16) and consist of a linked switch,
Change by the switch of described hand switch unit (13) height that described the first voltage source (12) exports the level of buffer (10) Enable Pin to, to control whether effectively enabling of described buffer (10).
2. require 1 described frequency converter stopping device as claim, it is characterized in that, the other end of described the first switch (16) is connected in the common port (COM) of frequency converter.
3. frequency converter stopping device as claimed in claim 1, is characterized in that, the input of described the first optocoupler (14) is in series with one second resistance (17).
4. frequency converter stopping device as claimed in claim 1; it is characterized in that; have access to one first diode (18) between the Enable Pin of each first resistance (11) and corresponding buffer (10); the positive pole of described the first diode (18) is connected with the first resistance (11), and negative pole is connected with the Enable Pin of buffer (10).
5. frequency converter stopping device as claimed in claim 1, is characterized in that, draws a software control terminal (19) from the Enable Pin place of each buffer (10), in the access of software control circuit, with whether effectively enabling of controller buffer (10).
6. frequency converter stopping device as claimed in claim 1, is characterized in that, the buffer that described buffer (10) enables for low level, and linked switch is normally closed switch.
7. frequency converter stopping device as claimed in claim 1, it is characterized in that, described frequency converter stopping device 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 the second optocoupler (21) is connected in described the first voltage source (12) by described the first resistance (11), ground connection after input cathode series connection one the 3rd resistance (24), output head anode is connected in the coil electrode of described electromagnetic relay (23), negative pole of output end is connected and is connected in the base stage of described triode (22) after 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 connects the common port (COM) of frequency converter, the coil electrode of described electromagnetic relay (23) connects a tertiary voltage source (26), the contact of each electromagnetic relay (23) is in parallel and access in band brake apparatus.
8. with the conducting of controlling the second optocoupler (21) whether frequency converter stopping device as claimed in claim 7, is characterized in that, draws a software control terminal (27) from the input anode of each the second optocoupler (21), in the access of software control circuit.
9. frequency converter stopping device as claimed in claim 7, is characterized in that, access one second switch (28) between each second optocoupler (21) and corresponding the 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 |
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| Publication Number | Publication Date |
|---|---|
| CN102255488A CN102255488A (en) | 2011-11-23 |
| CN102255488B true CN102255488B (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110192653 Active CN102255488B (en) | 2011-07-11 | 2011-07-11 | Frequency converter stopping device |
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| CN (1) | CN102255488B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105629805B (en) * | 2014-10-28 | 2019-11-05 | 乐星产电(无锡)有限公司 | Safe stopping devices |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200956560Y (en) * | 2006-08-29 | 2007-10-03 | 盛永富 | AC motor CW/CCW rotation control relay module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4644462B2 (en) * | 2004-10-12 | 2011-03-02 | カヤバ工業株式会社 | Motor drive circuit and shock absorber |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200956560Y (en) * | 2006-08-29 | 2007-10-03 | 盛永富 | AC motor CW/CCW rotation control relay module |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006-115556A 2006.04.27 |
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| CN102255488A (en) | 2011-11-23 |
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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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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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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 |