CN206680028U - A kind of protection system for stopping ladder caused by voltage dip for Escalator - Google Patents
A kind of protection system for stopping ladder caused by voltage dip for Escalator Download PDFInfo
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- CN206680028U CN206680028U CN201720056313.8U CN201720056313U CN206680028U CN 206680028 U CN206680028 U CN 206680028U CN 201720056313 U CN201720056313 U CN 201720056313U CN 206680028 U CN206680028 U CN 206680028U
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- Prior art keywords
- escalator
- voltage dip
- band
- type brake
- protection system
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Abstract
The utility model discloses a kind of protection system for stopping ladder caused by voltage dip for Escalator, including power network detection module, super energy-storage capacitor, inversion IGBT, step-up transformer, through swtich SCR, isolating transformer, Escalator control loop, Escalator band-type brake motor to be formed.Power network detection module is with 67 μ S frequency detecting power network, and when temporarily drop occurs in power network, through swtich SCR is disconnected, contacting between cutting-off controlling loop and band-type brake motor and power supply, and the compensating module being made up of ultracapacitor, inversion IGBT, step-up transformer is powered.The electrical system of Escalator is made up of main motor, frequency converter, control loop, band-type brake motor; main motor and frequency converter have certain ability to bear to voltage dip, and protection system only protects the control loop of Escalator and the band-type brake motor of Escalator equally to eliminate influence of the voltage dip to Escalator.The main feature of Tthe utility model system has low cost, quick detection, quick compensation, protection comprehensively etc..
Description
Technical field
A kind of emergency protection circuit device for electric is the utility model is related to, more particularly to a kind of Escalator caused by voltage dip
Stop the protection system of ladder.
Background technology
With the continuous quickening of domestic infrastructure, Escalator is a large amount of in life as a kind of easily means of transport
Come into operation.The appearance of Escalator also brings very big convenience to human lives simultaneously, but during the use of Escalator
There is also many security incidents, Escalator i.e. such product.The security incident occurred for Escalator, largely
On have influence on the orders of life of people, the life zone to people carrys out potential safety hazard, also result in bad social influence.
The electrical system of Escalator is made up of frequency converter, main motor, control loop, band-type brake motor etc., and system operation is complicated,
Including numerous sensitive components, it is vulnerable to the quality of power supply such as voltage dip, harmonic wave, voltage pulsation accident impact and stops ladder.According to
EPRI（U.S.'s DianKeYuan）AUTHORITATIVE DATA shows that more than 92% quality of power supply event rises for voltage dip or temporarily, other electric energy
Quality events proportion less than 8%, as long as therefore solve the influence that voltage dip is run to Escalator, you can avoid mostly
Number stops terraced accident.
The content of the invention
The technical problems to be solved in the utility model is to provide a kind of voltage dip that solves to being controlled in Escalator electrical system
The scheme of the influence of loop processed and band-type brake motor, avoid most of Escalators from stopping terraced failure, lift the safe handling of Escalator
Index.
The utility model is achieved through the following technical solutions：One kind stops ladder for Escalator caused by voltage dip
Protection system, including power network detection module, super energy-storage capacitor, inversion IGBT, step-up transformer, through swtich SCR, every
Formed from transformer, Escalator control loop, Escalator band-type brake motor.The electrical system of Escalator is by frequency converter, main motor, control
Loop processed, band-type brake motor are formed, and frequency converter and main motor can bear certain voltage dip, and design is only protected and controlled back
Road and band-type brake motor can equally eliminate influence of the voltage dip to Escalator electrical system.
As optimal technical scheme, the power network detection module utilizes MCU single chip computer AT MGA88PA real-time samplings record electricity
Net voltage, electric current, frequency data, the μ s of sample record interval 67, phase locked track is carried out to line voltage.
As optimal technical scheme, the super energy-storage capacitor, inversion IGBT, step-up transformer composition voltage dip are mended
Module is repaid, super energy-storage capacitor is responsible for storage energy, inversion IGBT generates pure sine wave alternating current using SPWM control algolithms,
It is city's electricity output that step-up transformer, which is used for the pure sine wave alternating current transformation of generation,.
As optimal technical scheme, the through swtich SCR is silicon controlled rectifier (SCR), and electric current passes through when supply network is normal
SCR flows to equipment, detects that supply network SCR occurs during voltage dip and disconnected, cutting-off controlling loop, band-type brake motor and power supply
Contact, is responsible for power supply by compensating module.
As optimal technical scheme, the Escalator control loop, the band-type brake motor of Escalator are helped as protection object, electricity
The main motor and frequency converter of ladder have certain ability to bear to voltage dip；The guard time of protection system is set as that 200ms is comprehensive
Close and consider that frequency converter and main motor obtain ability to bear to voltage dip and cause to stop with reference to ago ferroelectricity staircase voltage dip
The voltage dip duration of ladder.
As optimal technical scheme, the main function of the isolating transformer is the 220V alternating currents for exporting compensating module
Transformation is the control loop of elevator and the supply voltage of Escalator band-type brake motor.
The beneficial effects of the utility model are 1, quick detection power networks：Phase locked track is carried out to line voltage, detection refreshes
Frequency is 67 μ S, can quick detection power network whether there is voltage dip；2nd, quick compensation：When detect supply network occur electricity
Quick output pure sine wave alternating current offset voltage temporarily drops in 0.8~2ms when pressure temporarily drops；3rd, compensation depth is big：Compensation depth is most
Big reachable 0V；4th, guard time is reasonable：200ms guard time has considered the voltage dip that supply network occurs in subway
Duration and frequency converter and main motor to voltage temporarily by ability to bear；5th, cost is low：Object is protected to be returned for the control of Escalator
Road and band-type brake motor total capacity are less than 1KVA, larger for capacity and to the stronger main motor of voltage dip ability to bear and frequency conversion
Device is not protected then, on the premise of it can eliminate voltage dip and Escalator is influenceed, is greatly reduced compensation capacity and is effectively controlled
Cost.
Brief description of the drawings
, below will be to implementation case for clearer explanation the utility model embodiment and technical scheme of the prior art
The accompanying drawing used in example or description of the prior art is briefly described, it should be apparent that, the accompanying drawing in figure below description is only this reality
With some new embodiments, for one of ordinary skill in the art, on the premise of not paying creative work, go back
Other accompanying drawings can be obtained according to these accompanying drawings：
Fig. 1 is structural representation of the present utility model；
Fig. 2 is SPWM control algolithm area equivalent figures.
Embodiment
All features or disclosed all methods announced in this specification or during the step of, except mutually exclusive
Beyond feature/or step, it can combine in any way.
This specification（Including any accessory claim, summary and accompanying drawing）Any feature of middle announcement, except non-specifically
Narration, it can be replaced by other equivalence values or with similar purpose alternative features.I.e., unless specifically stated otherwise, each feature
A simply example in a series of equivalent or similar characteristics.
As shown in figure 1, a kind of protection system for stopping ladder caused by voltage dip for Escalator of the utility model, including electricity
Net detection module, super energy-storage capacitor, inversion IGBT, step-up transformer, through swtich SCR, isolating transformer, Escalator control
Loop processed, Escalator band-type brake motor are formed；
The electrical system of Escalator is made up of frequency converter, main motor, control loop, band-type brake motor, frequency converter and main motor
Certain voltage dip can be born, design only protects control loop and band-type brake motor equally to eliminate voltage dip pair
The influence of Escalator electrical system.
The detection power network detection module using MCU single chip computer AT MGA88PA real-time samplings record line voltage, electric current,
Frequency data, the μ s of sample record interval 67, phase locked track is carried out to line voltage.
The super energy-storage capacitor, inversion IGBT, step-up transformer composition voltage dip compensating module, super energy storage electricity
Container is responsible for storing energy, inversion IGBT using SPWM control algolithms generation pure sine wave alternating current, and step-up transformer is used for will
The pure sine wave alternating current transformation of generation is city's electricity output；
Control algolithm of the SPWM control algolithms based on equivalent area：Utilize sine wave fritter area S1 and pulse area S2 phases
Etc. principle, the positive half cycle of sine wave is divided into N deciles, then the width of each decile is π/N radians, is calculated using the algorithm of area equivalent
Go out N number of different pwm value in half period, caused pulsewidth ordered series of numbers is stored in MCU single-chip microcomputers with tabular form
In ATMEGA88PA-AU ROM, for routine call：
Sine wave area formula：
Pulse area formula：
Ton formula are drawn by area equivalent hair
In formula：
M is modulation degree
U is the electricity of super energy-storage capacitor group
N is carrier wave ratio, i.e., the pulse number in a cycle, and N takes 300 here
K values are 0-299.
The through swtich SCR is silicon controlled rectifier (SCR), and electric current flows to equipment by SCR when supply network is normal, detection
SCR disconnects when there is voltage dip to supply network, the contact in cutting-off controlling loop, band-type brake motor and power supply, by compensating module
It is responsible for power supply.
The Escalator control loop, the band-type brake motor of Escalator are as protection object, the main motor of Escalator and frequency conversion
Device has certain ability to bear to voltage dip；The guard time of protection system is set as that 200ms considers frequency converter and master
Motor obtains ability to bear to voltage dip and causes to stop the voltage dip duration of ladder with reference to ago ferroelectricity staircase voltage dip.
The main function of the isolating transformer is the control for elevator by the 220V alternating currents transformation of compensating module output
Loop and the supply voltage of Escalator band-type brake motor.
In the present embodiment, protection object is the control loop and band-type brake motor of Escalator：Safety return circuit comprising 300VA,
Brake 223.5VA, 48V control loop 92.5VA, direct current 24V control loops are, it is necessary to protect total capacity 694VA, it is contemplated that one
Fixed nargin, compensation total capacity are set as 1KVA.The output voltage of compensating module is 220V, and safety return circuit, brake 48V are controlled
Loop processed, the supply voltage of 24V control loops are 380V, it is necessary to use isolating transformer 220V/380V to export three-phase 380V
Alternating current.
The beneficial effects of the utility model are 1, quick detection power networks：Phase locked track is carried out to line voltage, detection refreshes
Frequency is 67 μ S, can quick detection power network whether there is voltage dip；2nd, quick compensation：When detect supply network occur electricity
Quick output pure sine wave alternating current offset voltage temporarily drops in 0.8~2ms when pressure temporarily drops；3rd, compensation depth is big：Compensation depth is most
Big reachable 0V；4th, guard time is reasonable：200ms guard time has considered the voltage dip that supply network occurs in subway
Duration and frequency converter and main motor to voltage temporarily by ability to bear；5th, cost is low：Object is protected to be returned for the control of Escalator
Road and band-type brake motor total capacity are less than 1KVA, larger for capacity and to the stronger main motor of voltage dip ability to bear and frequency conversion
Device is not protected then, on the premise of it can eliminate voltage dip and Escalator is influenceed, is greatly reduced compensation capacity and is effectively controlled
Cost.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any change or replacement obtained without creative work, should all cover the scope of protection of the utility model it
Interior, therefore, the scope of protection of the utility model should be determined by the scope of protection defined in the claims.
Claims (6)
- A kind of 1. protection system for stopping ladder caused by voltage dip for Escalator, it is characterised in that：Comprising power network detection module, Super energy-storage capacitor, inversion IGBT, step-up transformer, through swtich SCR, isolating transformer, Escalator control loop, electricity are helped Terraced band-type brake motor is formed.
- 2. a kind of protection system for stopping ladder caused by voltage dip for Escalator according to claim 1, its feature exist In：The power network detection module is using MCU single-chip microcomputers real-time sampling record line voltage, electric current, frequency data, between sample record Every 67 μ S, phase locked track is carried out to line voltage.
- 3. a kind of protection system for stopping ladder caused by voltage dip for Escalator according to claim 1, its feature exist In：The super energy-storage capacitor, inversion IGBT, step-up transformer composition voltage dip compensating module, super energy-storage capacitor It is responsible for storage energy, inversion IGBT using SPWM control algolithms generation pure sine wave alternating current, step-up transformer is used for will generation Pure sine wave alternating current transformation be city's electricity output.
- 4. a kind of protection system for stopping ladder caused by voltage dip for Escalator according to claim 1, its feature exist In：The through swtich SCR is silicon controlled rectifier (SCR), and civil power flows to equipment by SCR when supply network is normal, detects power supply There are SCR disconnections during voltage dip in network, the contact in cutting-off controlling loop, band-type brake motor and civil power, is responsible for confession by compensating module Electricity.
- 5. a kind of protection system for stopping ladder caused by voltage dip for Escalator according to claim 1, its feature exist In：The control loop of the Escalator, the band-type brake motor of Escalator protect the guard time of system to be set as protection object 200ms。
- 6. a kind of protection system for stopping ladder caused by voltage dip for Escalator according to claim 1, its feature exist In：The main function of the isolating transformer is that the 220V alternating currents transformation for exporting compensating module is elevator controlling loop and electricity The supply voltage of staircase band-type brake motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720056313.8U CN206680028U (en) | 2017-01-18 | 2017-01-18 | A kind of protection system for stopping ladder caused by voltage dip for Escalator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720056313.8U CN206680028U (en) | 2017-01-18 | 2017-01-18 | A kind of protection system for stopping ladder caused by voltage dip for Escalator |
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| CN206680028U true CN206680028U (en) | 2017-11-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110171765A (en) * | 2019-05-31 | 2019-08-27 | 广州地铁设计研究院股份有限公司 | A kind of escalator guard method and its system |
| CN112653162A (en) * | 2020-12-17 | 2021-04-13 | 广东电网有限责任公司广州供电局 | Voltage sag compensation apparatus and method |
| CN116742776A (en) * | 2023-05-12 | 2023-09-12 | 康力电梯股份有限公司 | Protection device for power supply voltage sag of escalator or sidewalk |
-
2017
- 2017-01-18 CN CN201720056313.8U patent/CN206680028U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110171765A (en) * | 2019-05-31 | 2019-08-27 | 广州地铁设计研究院股份有限公司 | A kind of escalator guard method and its system |
| CN110171765B (en) * | 2019-05-31 | 2024-04-12 | 广州地铁设计研究院股份有限公司 | Escalator protection method and system |
| CN112653162A (en) * | 2020-12-17 | 2021-04-13 | 广东电网有限责任公司广州供电局 | Voltage sag compensation apparatus and method |
| CN112653162B (en) * | 2020-12-17 | 2023-05-30 | 广东电网有限责任公司广州供电局 | Voltage sag compensation device and method |
| CN116742776A (en) * | 2023-05-12 | 2023-09-12 | 康力电梯股份有限公司 | Protection device for power supply voltage sag of escalator or sidewalk |
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