CN201374556Y - Protective circuit for transmitting disk of electric tool rest - Google Patents
Protective circuit for transmitting disk of electric tool rest Download PDFInfo
- Publication number
- CN201374556Y CN201374556Y CN200920036234U CN200920036234U CN201374556Y CN 201374556 Y CN201374556 Y CN 201374556Y CN 200920036234 U CN200920036234 U CN 200920036234U CN 200920036234 U CN200920036234 U CN 200920036234U CN 201374556 Y CN201374556 Y CN 201374556Y
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- Prior art keywords
- protective circuit
- circuit
- tool rest
- electric tool
- transmitting disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a protective circuit for a transmitting disk of an electric tool rest. The protective circuit is formed by connecting in series a diode (1) and an RC filter circuit, wherein the RC filter circuit comprises a resistor (2) and a capacitor (3). After all signal output terminals of a transmitting disk of an electric tool rest are connected in series with the protective circuit of the utility model, the phase inversion of a direct-current power supply and the impact failure of operating overvoltage, higher harmonic voltage and transient overcurrent can be prevented. After the input terminal of the power supply is connected in series with the protective circuit of the utility model, the stability of the operating point of a Hall element of the transmitting disk can be ensured.
Description
Technical field
The utility model relates to a kind of electric driving tool post dish protective circuit of posting a letter, and belongs to the Digit Control Machine Tool field, is used in electric driving tool post the post a letter signal output part and the power input of dish, shields.
Background technology
At present on electric driving tool post is posted a letter dish, be to adopt the 3144E type Hall element of U.S. Allegro company production for a long time as posting a letter element always, operating position is more stable reliable, but the production that has stopped this type product in the said firm from 2006 changes into and produces 1104E type product.The second half year, 3144E type product on market was just rarely found then, can only select new product 1104E type for use as an alternative.After the dish manufacturing of posting a letter was in the first batch used, we found that electric driving tool post just has a large amount of damages in the burn-in ageing process, cause bigger influence and loss after the part knife rest dispatches from the factory especially.Being checked technical conditions, find that new product 1104 is different with the circuit structure of original product 3144, what 3144 types adopted is transistor output, new product 1104 then is the NMOS field effect transistor output of adopting, though the element function is identical, but electrical property is different, novel product is low in energy consumption, low cost of manufacture is its advantage, but it is higher relatively to the environment for use condition, very responsive to working power voltage especially, switching overvoltage and higher harmonic components are easy to cause breakdown to destroy to it in the circuit.
Summary of the invention
The purpose of this utility model is can be to the dish protective circuit of posting a letter of the element of the posting a letter electric driving tool post that shield on the dish of posting a letter.
The technical scheme that realizes above-mentioned purpose is: a kind of electric driving tool post dish protective circuit of posting a letter, be in series by diode and RC filter circuit, and RC filtered electrical routing resistance and electric capacity are formed.
After adopting technique scheme, at all signal output part series diodes and RC filter circuit, with prevent DC power supply paraphase (wiring error causes) and switching overvoltage, higher harmonic voltage and moment overcurrent impact failure.At same series diode of power input and RC filter circuit, diode plays anti-paraphase (wiring error) effect; The RC filter plays the step-down effect on the one hand, strobes on the other hand, and dish Hall element stabilization of operating point guarantees to post a letter.
Description of drawings
Fig. 1 is a circuit structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
As shown in Figure 1, a kind of electric driving tool post dish protective circuit of posting a letter is in series by diode 1 and RC filter circuit, and RC filtered electrical routing resistance 2 and electric capacity 3 are formed.
Operation principle of the present utility model is as follows:
A, when posting a letter dish when adding forward voltage, diode 1 conducting, dish provides running current in order to post a letter; When the dish of posting a letter connected reverse voltage, diode 1 ended, and loses voltage on the Hall element, and no current in the circuit has prevented that the reverse voltage electric current from damaging Hall element.
B, the filter of being made up of RC have three effects.The one, electric current forms certain voltage drop (about 12V) through resistance 2 when operate as normal, with the operating voltage and the power loss of reduction Hall element, avoids and reduces the infringement of DC power supply voltage fluctuation to Hall element; The 2nd, the RC circuit can prevent the impact to Hall element of switching overvoltage and higher harmonic voltage.When on the external circuit or post a letter Hall element when switch moment forms peaking voltage, the RC circuit can be gone into ground with its interception and by electric capacity 3 bypasses, has so just avoided impact and the interference of harmful voltage to Hall element effectively; The 3rd, when posting a letter dish signal output part (low level output) instantaneous short circuit (with power supply "+" end); short circuit current can produce very big voltage drop on resistance R; stop the further increase of short circuit current; so just significantly reduced the output loading of Hall element and to the direct impact of its output; avoid or reduced the injury and the destruction of Hall element, played the better protect effect.
Claims (1)
1, a kind of electric driving tool post dish protective circuit of posting a letter, it is characterized in that: this circuit is in series by diode (1) and RC filter circuit, and RC filtered electrical routing resistance (2) and electric capacity (3) are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920036234U CN201374556Y (en) | 2009-03-09 | 2009-03-09 | Protective circuit for transmitting disk of electric tool rest |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920036234U CN201374556Y (en) | 2009-03-09 | 2009-03-09 | Protective circuit for transmitting disk of electric tool rest |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201374556Y true CN201374556Y (en) | 2009-12-30 |
Family
ID=41500637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920036234U Expired - Fee Related CN201374556Y (en) | 2009-03-09 | 2009-03-09 | Protective circuit for transmitting disk of electric tool rest |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201374556Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103831655A (en) * | 2014-03-05 | 2014-06-04 | 常州市宏达机床数控设备有限公司 | Signal sending disk with answer signals for electric tool rest |
| CN103831654A (en) * | 2014-03-05 | 2014-06-04 | 常州市宏达机床数控设备有限公司 | Signaling disc for electrical tool carrier |
| CN109756202A (en) * | 2019-01-30 | 2019-05-14 | 华勤通讯技术有限公司 | A kind of motor drive circuit and terminal |
| CN110854830A (en) * | 2018-08-20 | 2020-02-28 | 博世力士乐(西安)电子传动与控制有限公司 | STO input circuit for frequency converter, servo system and filter bleeder circuit |
-
2009
- 2009-03-09 CN CN200920036234U patent/CN201374556Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103831655A (en) * | 2014-03-05 | 2014-06-04 | 常州市宏达机床数控设备有限公司 | Signal sending disk with answer signals for electric tool rest |
| CN103831654A (en) * | 2014-03-05 | 2014-06-04 | 常州市宏达机床数控设备有限公司 | Signaling disc for electrical tool carrier |
| CN103831655B (en) * | 2014-03-05 | 2016-06-15 | 江苏宏达数控科技股份有限公司 | Electric driving tool post sender set with recall signal |
| CN110854830A (en) * | 2018-08-20 | 2020-02-28 | 博世力士乐(西安)电子传动与控制有限公司 | STO input circuit for frequency converter, servo system and filter bleeder circuit |
| CN109756202A (en) * | 2019-01-30 | 2019-05-14 | 华勤通讯技术有限公司 | A kind of motor drive circuit and terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091230 Termination date: 20140309 |