CN203415956U - Frequency converter system protection device - Google Patents
Frequency converter system protection device Download PDFInfo
- Publication number
- CN203415956U CN203415956U CN201320527960.4U CN201320527960U CN203415956U CN 203415956 U CN203415956 U CN 203415956U CN 201320527960 U CN201320527960 U CN 201320527960U CN 203415956 U CN203415956 U CN 203415956U
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- Prior art keywords
- brake pipe
- power supply
- circuit breaker
- brake
- main power
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Abstract
The utility model discloses a frequency converter system protection device which comprises a brake pipe conduction detection device and a main power supply circuit breaker. The main power supply circuit breaker is arranged on the power supply input end of a frequency converter power supply main circuit. The brake pipe conduction detection device is electrically connected with both ends of a brake resistor which is arranged on the frequency converter power supply main circuit and is connected in series with a brake pipe. The brake pipe conduction detection device is electrically connected with the main power supply circuit breaker. According to the frequency converter system protection device, the brake pipe conduction detection device is arranged to sense the voltage of the brake resistor and judge whether the brake pipe is in a conduction state; when the continuous conduction time of the brake pipe exceeds a limit value of a certain range, the brake pipe conduction detection device judges the abnormality of the brake pipe, and sends a signal to the main power supply circuit breaker which is arranged on the power supply input end of the power supply main circuit; the main power supply circuit breaker acts and the power supply main circuit of the brake resistor automatically switches off; and when the frequency converter brake pipe has a short circuit fault, the conditions of overload and burnout of the brake resistor are prevented.
Description
Technical field
The utility model relates to a kind of frequency convertor system protective device.
Background technology
Frequency converter is widely used on elevator, rail vehicle, it is when braking, can produce a large amount of regenerated energies, these energy are in the frequency conversion system with energy back not, normally by brake pipe, controlling the brake resistance conducting being connected in parallel on frequency converter bus turn-offs, mode with heating consumes, once and the brake pipe short circuit meeting of frequency converter causes brake resistance to transship for a long time work, and then have the risk of burning.
Summary of the invention
Based on this, the utility model is to overcome the defect of prior art, and a kind of frequency convertor system protective device is provided, and in the time of effectively preventing frequency converter brake pipe short trouble, the situation of brake resistance overload burning occurs.
Its technical scheme is as follows:
A kind of frequency convertor system protective device; comprise brake pipe breakover detecting device, main power source circuit breaker; described main power source circuit breaker is arranged on the power input of inverter supply major loop; described brake pipe breakover detecting device be arranged on inverter supply major loop; and the brake resistance two ends of connecting with brake pipe electrical connection, and this brake pipe breakover detecting device is connected with main power source circuit breaker is electric.
Described brake pipe breakover detecting device comprises fault-signal check-out console, auxiliary relay, described fault-signal check-out console is in parallel with described brake resistance, and this fault-signal check-out console and auxiliary relay electrical connection, this auxiliary relay is connected with main power source circuit breaker is electric.
Described main power source circuit breaker comprises shunt release, described shunt release and the electrical connection of described auxiliary relay.
Below the advantage of aforementioned techniques scheme or principle are described:
Above-mentioned frequency convertor system protective device; by brake pipe breakover detecting device is set; the voltage of sensing brake resistance; judge whether brake pipe is conducting state; when the continuous ON time of brake pipe surpasses the limits value of certain limit; brake pipe breakover detecting device judgement brake pipe is abnormal; send signal to the main power source circuit breaker that is arranged on the power input of main circuit power supply; thereby the main circuit power supply that brake resistance is cut off in the effect of main power source circuit breaker automatically, while preventing frequency converter brake pipe short trouble, the situation of brake resistance overload burning occurs.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the frequency convertor system protective device described in the utility model embodiment;
Description of reference numerals:
100, brake resistance, 200, brake pipe, 300, brake pipe breakover detecting device, 310, fault-signal check-out console, 320, auxiliary relay, 400, main power source circuit breaker, 410, shunt release, 500, rectifying device.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated:
As shown in Figure 1; a kind of frequency convertor system protective device; comprise brake pipe breakover detecting device 300, main power source circuit breaker 400; described main power source circuit breaker 400 is arranged on the power input RST end of inverter supply major loop; described brake pipe breakover detecting device 300 be arranged on inverter supply major loop; and the brake resistance 100 two ends electrical connections of connecting with brake pipe 200, and this brake pipe breakover detecting device 300 and 400 electrical connections of main power source circuit breaker.
Wherein, described brake pipe breakover detecting device 300 comprises fault-signal check-out console 310, auxiliary relay 320, described fault-signal check-out console 310 is in parallel with described brake resistance 100, and this fault-signal check-out console 310 and auxiliary relay 320 electrical connections, this auxiliary relay 320 and 400 electrical connections of main power source circuit breaker.Described main power source circuit breaker comprises shunt release 410, described shunt release 410 and described auxiliary relay 320 electrical connections, and the coil voltage of this shunt release is AC380V.
Traditional frequency converter frequency converter when brake pipe short trouble being detected quits work, but itself can not cut off power supply, electrical network is directly added on the two ends of brake resistance 100 by main circuit power supply after 500 rectifications of frequency converter rectifying device, because the power of brake resistance 100 is to be configured according to the average power of feedback, the average power that its power calculation value consumes while being often less than direct loading main circuit power supply voltage, in this case, once brake pipe 200 short circuit meetings cause the long-term overload work of brake resistance 100, and then have the risk of burning.
Frequency convertor system protective device described in the present embodiment, the brake pipe breakover detecting device 300 being electrically connected by brake resistance two ends, sensing brake resistance P, the voltage at PB two ends, when the continuous ON time of brake pipe is greater than 2s, the 310 judgement brake pipe short circuits of fault-signal check-out console are abnormal, thereby the wire loop of transmitted signal conducting auxiliary relay 320, the normally opened contact of auxiliary relay 320 is closed, and then the wire loop of conducting shunt release, thereby trigger shunt release 410 actions of main power source circuit breaker, disconnect inverter supply major loop, the final brake resistance of cutting off is powered, while preventing frequency converter brake pipe short trouble, the situation of brake resistance overload burning occurs.Confirm the continuous ON time of described brake pipe according to the charging interval of timing electric capacity, the value of overstepping the extreme limit, can judge brake pipe short circuit.
The above embodiment has only expressed embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (3)
1. a frequency convertor system protective device; it is characterized in that; comprise brake pipe breakover detecting device, main power source circuit breaker; described main power source circuit breaker is arranged on the power input of inverter supply major loop; described brake pipe breakover detecting device be arranged on inverter supply major loop; and the brake resistance two ends of connecting with brake pipe electrical connection, and this brake pipe breakover detecting device is connected with main power source circuit breaker is electric.
2. frequency convertor system protective device according to claim 1; it is characterized in that; described brake pipe breakover detecting device comprises fault-signal check-out console, auxiliary relay; described fault-signal check-out console is in parallel with described brake resistance; and this fault-signal check-out console and auxiliary relay electrical connection, this auxiliary relay is connected with main power source circuit breaker is electric.
3. frequency convertor system protective device according to claim 2, is characterized in that, described main power source circuit breaker comprises shunt release, described shunt release and the electrical connection of described auxiliary relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320527960.4U CN203415956U (en) | 2013-08-27 | 2013-08-27 | Frequency converter system protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320527960.4U CN203415956U (en) | 2013-08-27 | 2013-08-27 | Frequency converter system protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203415956U true CN203415956U (en) | 2014-01-29 |
Family
ID=49978815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320527960.4U Expired - Lifetime CN203415956U (en) | 2013-08-27 | 2013-08-27 | Frequency converter system protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203415956U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067927A (en) * | 2015-08-11 | 2015-11-18 | 清能德创电气技术（北京）有限公司 | Servo driver brake resistor loop detection method |
| CN106159905A (en) * | 2015-03-26 | 2016-11-23 | 控制技术有限公司 | The fault logic circuits of converter braking circuit, method and apparatus and converter |
| CN110752587A (en) * | 2019-10-28 | 2020-02-04 | 迅达（中国）电梯有限公司 | Short-circuit protection device for IGBT module of elevator frequency converter |
| CN112928742A (en) * | 2019-12-05 | 2021-06-08 | 新疆金风科技股份有限公司 | Direct-current bus overvoltage protection method of converter and corresponding controller |
| CN113612421A (en) * | 2021-08-03 | 2021-11-05 | 珠海格力电器股份有限公司 | Braking circuit control method and device, storage medium and servo motor |
-
2013
- 2013-08-27 CN CN201320527960.4U patent/CN203415956U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159905A (en) * | 2015-03-26 | 2016-11-23 | 控制技术有限公司 | The fault logic circuits of converter braking circuit, method and apparatus and converter |
| CN105067927A (en) * | 2015-08-11 | 2015-11-18 | 清能德创电气技术（北京）有限公司 | Servo driver brake resistor loop detection method |
| CN105067927B (en) * | 2015-08-11 | 2018-01-09 | 清能德创电气技术（北京）有限公司 | A kind of servo-driver braking resistor return circuit detection method |
| CN110752587A (en) * | 2019-10-28 | 2020-02-04 | 迅达（中国）电梯有限公司 | Short-circuit protection device for IGBT module of elevator frequency converter |
| CN110752587B (en) * | 2019-10-28 | 2022-03-15 | 迅达（中国）电梯有限公司 | Short-circuit protection device for IGBT module of elevator frequency converter |
| CN112928742A (en) * | 2019-12-05 | 2021-06-08 | 新疆金风科技股份有限公司 | Direct-current bus overvoltage protection method of converter and corresponding controller |
| CN112928742B (en) * | 2019-12-05 | 2023-09-12 | 金风科技股份有限公司 | Overvoltage protection method for direct-current bus of converter and corresponding controller |
| CN113612421A (en) * | 2021-08-03 | 2021-11-05 | 珠海格力电器股份有限公司 | Braking circuit control method and device, storage medium and servo motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140129 |