CN104401829B - The method for excessive heating protection of elevator frequency converter power device and device - Google Patents
The method for excessive heating protection of elevator frequency converter power device and device Download PDFInfo
- Publication number
- CN104401829B CN104401829B CN201410525287.XA CN201410525287A CN104401829B CN 104401829 B CN104401829 B CN 104401829B CN 201410525287 A CN201410525287 A CN 201410525287A CN 104401829 B CN104401829 B CN 104401829B
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- Prior art keywords
- elevator
- frequency converter
- temperature
- described temperature
- power device
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
Abstract
The invention discloses method for excessive heating protection and the device of a kind of elevator frequency converter power device；Described method is: temperature T of detection elevator frequency converter power device；With overtemperature protection the first preset temperature T1, detected temperature T is carried out differentiation compare: when described temperature T is more than described first preset temperature T1; the carrier frequency of elevator frequency converter is reduced to below preset value; and by three-phase modulations, the modulation system of elevator frequency converter is switched to two-phase modulation, and deceleration of elevator is made to run to closest layer parking；Described device includes temperature detecting module, temperature discrimination module, carrier frequency handover module and modulation system handover module；The method and device can overcome the jerk that elevator causes, even oppressive phenomenon because frequency converter is overheated, are conducive to improving the security that elevator runs.
Description
Technical field
The present invention relates to method for excessive heating protection and the device of a kind of elevator frequency converter power device.
Background technology
The overtemperature protection of frequency converter mainly has two kinds of methods:
Method one, sets overheated guarantor in the case of ensureing transducer power device less than maximum permissible temperature
Protect temperature threshold T1.Detect temperature T of power device in real time during frequency converter runs, when this temperature T
During more than overtemperature protection temperature threshold T1, stop frequency converter output, it is to avoid transducer power device failure.
Method two, sets overheated guarantor in the case of ensureing transducer power device less than maximum permissible temperature
Protect temperature threshold T1 and T2, and T2 > T1.The temperature of power device is detected in real time during frequency converter runs
Degree T, when this temperature T > T2 when, stop frequency converter output；When this temperature T1, < T < during T2, reduces frequency converter
Power output.
Elevator frequency converter generally uses method one to make overtemperature protection, but so can cause elevator jerk, even
Oppressive.Method two is not particularly suited for the occasion of elevator, this is because the load in running process of elevator is constant
, therefore can not detect that < T < during T2, reduces the power output of frequency converter to power device temperature T1.
Content of the invention
Based on this, the invention reside in the defect overcoming prior art, a kind of elevator frequency converter power device is provided
Method for excessive heating protection and device, it can overcome the jerk that elevator causes because frequency converter is overheated, even tired
The phenomenon of people, is conducive to improving the security that elevator runs.
For overcoming drawbacks described above, the method for excessive heating protection of the elevator frequency converter power device of the present invention, including with
Lower step: temperature T of detection elevator frequency converter power device；By detected temperature T and overtemperature protection the
One preset temperature T1 carries out differentiation and compares: when described temperature T is more than described first preset temperature T1, by electricity
The carrier frequency of ladder frequency converter is reduced to below preset value, and is adjusted the modulation system of elevator frequency converter by three-phase
System switches to two-phase modulation, and makes deceleration of elevator run to closest layer parking.
For overcoming drawbacks described above, the overtemperature protection system of the elevator frequency converter power device of the present invention, comprising:
Temperature detecting module, for detecting temperature T of elevator frequency converter power device；Temperature discrimination module, being used for will
Temperature T of the elevator frequency converter power device detecting and overtemperature protection the first preset temperature T1 carry out differentiating ratio
Relatively；Carrier frequency handover module, for the carrier frequency of elevator frequency converter is reduced to below preset value, with
And for being preset value by the carrier frequency recovery of elevator frequency converter；Modulation system handover module, is used for realizing
Switching between three-phase modulations and two-phase are modulated for the modulation system of elevator frequency converter.
According to the method for excessive heating protection of elevator frequency converter power device and the device of the present invention, can become at elevator
Frequently, in the case that device occurs overheated, the carrier frequency of described frequency converter is reduced, and by the modulation of elevator frequency converter
Mode is switched to two-phase modulation by three-phase modulations, makes deceleration of elevator run to closest layer parking.Therefore, the party
Method and device can overcome the jerk that elevator causes, even oppressive phenomenon because frequency converter is overheated, are conducive to
Improve the security that elevator runs.
Brief description
Fig. 1 is the structure mould of the overtemperature protection system of the elevator frequency converter power device described in the embodiment of the present invention
Block schematic diagram.
Fig. 2 is the flow chart of the method for excessive heating protection of the elevator frequency converter power device described in the embodiment of the present invention.
Description of reference numerals:
10th, temperature detecting module, the 20th, temperature discrimination module, the 30th, carrier frequency handover module, the 40th, adjust
Mode handover module processed, the 50th, rate curve processing module, the 60th, stop frequency converter output module.
Detailed description of the invention
Below embodiments of the invention are described in detail:
As it is shown in figure 1, the overtemperature protection system of a kind of elevator frequency converter power device, comprising:
Temperature detecting module 10, for real-time temperature T detecting elevator frequency converter power device；
Temperature discrimination module 20, for temperature T of elevator frequency converter power device and the overheated guarantor that will detect
Protect the first preset temperature T1 to carry out differentiation and compare, and for the elevator frequency converter power device that will detect
Temperature T carries out differentiation with described overheated recovery preset temperature T0 and compares, and for by described temperature T with described
Overtemperature protection the second preset temperature T2 carries out differentiation and compares；Specifically, this temperature discrimination module 20 can
Whether elevator frequency converter power device temperature T for differentiating detection in real time presets temperature more than overtemperature protection first
Degree T1, it determines whether elevator frequency converter power device temperature T of detection is preset more than overtemperature protection second in real time
Temperature T2, and differentiate whether elevator frequency converter power device temperature T detecting in real time recovers pre-less than overheated
If temperature T0；
Carrier frequency handover module 30, for being reduced to four points of preset value by the carrier frequency of elevator frequency converter
One of, or be preset value by the carrier frequency recovery of elevator frequency converter；
Modulation system handover module 40, for realizing the modulation system of elevator frequency converter in three-phase modulations and two-phase
Switching between modulation；This modulation system handover module 40 i.e. can be by the modulation system of elevator frequency converter by three
Modulation mutually switches to two-phase to modulate, it is also possible to by two-phase modulation, the modulation system of elevator frequency converter is reverted to three
Modulate mutually；
Rate curve processing module 50, generates corresponding speed for the speed running status according to elevator and runs
Curve, enables elevator to run according to corresponding speed operation curve；Specifically, it is in acceleration at elevator
During running status, this rate curve processing module 50 can generate First Speed operation curve, makes elevator stop
Can run according to this First Speed operation curve after acceleration, and when elevator is in and travels at the uniform speed state, should
Rate curve processing module 50 then generates second speed operation curve, makes elevator run song according to this second speed
Line runs, and when elevator is in and runs slowly state, this rate curve processing module 50 generates third speed operation
Curve, makes elevator run according to third speed operation curve；
Stop frequency converter output module 60, for cutting off the output of elevator frequency converter PWM.
As in figure 2 it is shown, the present embodiment also provides the method for excessive heating protection of a kind of elevator frequency converter power device,
Specifically include following steps:
Step S10: detected temperature T of elevator frequency converter power device by temperature detecting module 10 in real time；
Step S20: call temperature discrimination module 20 and differentiate that whether described temperature T is pre-more than overtemperature protection first
If temperature T1, if so, then enter step S30, if it is not, then return step S10；
Step S30: elevator frequency converter enters overheated operational mode, makes the carrier frequency of elevator frequency converter be reduced to
/ 4th of preset value, and make the modulation system of elevator frequency converter be switched to two-phase modulation by three-phase modulations,
Subsequently into step S40；
Step S40: judge whether elevator is in acceleration: if so, then enter step S50；If it is not, then enter
Enter step S60；
Step S50: make elevator stop accelerate, and call rate curve processing module 50 generate First Speed fortune
Row curve, makes elevator run slowly to closest layer parking according to this First Speed operation curve, subsequently into step
Rapid S80；
Step S60: judge whether elevator is in the process of traveling at the uniform speed: if so, then enter step S70；If it is not,
Then enter step S80；
S70: call rate curve processing module 50 and generate second speed operation curve, makes elevator according to second
Speed operation curve runs slowly to closest layer parking；
Certainly, when elevator operationally, if elevator is neither in Accelerating running, be not at the uniform velocity to transport
In row, then show that elevator is in the state of running slowly, now, it is not necessary to the corresponding 3rd is run slowly to this
Rate curve carries out change process, and elevator only need to be allowed to stop to closest layer according to the operation of this third speed operation curve
Car；
Step S80: temperature T of elevator frequency converter power device is detected again, and enters step S90；
Step S90: call temperature discrimination module 20, it is judged that whether temperature T obtaining in step S80 is less than
Overheated recovery preset temperature T0: if so, then enter step S100；If it is not, then enter step S110；
Step S100, by the carrier frequency recovery of elevator frequency converter to preset value, and by the tune of elevator frequency converter
Mode processed is reverted to three-phase modulations by two-phase modulation, is then back to step S80；
Step S110: continue to call temperature discrimination module 20, it is judged that whether temperature T obtaining in step S80
More than overtemperature protection the second preset temperature T2: if so, then enter step S120, if it is not, then enter step S130；
Step S120: call stopping frequency converter output module 60, stop the output of elevator frequency converter；
Step S130: continue to recall temperature discrimination module 20, it is judged that temperature T obtaining in step S80 is
No more than overtemperature protection the first preset temperature T1: if so, then to enter step S140；If it is not, then return step
S80；
Step S140: make the carrier frequency of elevator frequency converter continue to be set to 1/4th of preset value, and should
The modulation system of elevator frequency converter continues to be set to two-phase modulation, is then back to step S80.
In a word, the method and device of the present embodiment is by the carrier frequency of elevator frequency converter and modulation system
Reasonable adjustment, and by suitable process settings so that elevator frequency converter also can export when overheated
Rated power, delivers to level position passenger, thus avoid jerk that elevator causes because frequency converter is overheated,
Even oppressive phenomenon, is conducive to improving the security that elevator runs.
Embodiment described above only have expressed the detailed description of the invention of the present invention, and it describes more concrete and detailed,
But therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for this area
Those of ordinary skill for, without departing from the inventive concept of the premise, can also make some deformation and
Improving, these broadly fall into protection scope of the present invention.
Claims (11)
1. the method for excessive heating protection of an elevator frequency converter power device, it is characterised in that the method include with
Lower step:
Temperature T of detection elevator frequency converter power device；
With overtemperature protection the first preset temperature T1, described temperature T is carried out differentiation compare: when described temperature T is big
When described first preset temperature T1, the carrier frequency of elevator frequency converter is reduced to below preset value, and will
The modulation system of elevator frequency converter is switched to two-phase modulation by three-phase modulations, and makes deceleration of elevator run to recently
Layer stops；
Deceleration of elevator runs during stopping to closest layer, prejudges the speed running status of elevator: if
Elevator is in Accelerating running state, then make elevator stop accelerating, and calls rate curve processing module and generate the
One speed operation curve, makes elevator run slowly to closest layer parking according to this First Speed operation curve.
2. the method for excessive heating protection of elevator frequency converter power device according to claim 1, its feature exists
In also including in the speed running status prejudge elevator: if elevator is in the state of traveling at the uniform speed, then
Call rate curve processing module and generate second speed operation curve, make elevator run song according to this second speed
Line runs slowly to closest layer parking；If elevator is in the state of running slowly, then elevator is made to transport according to this deceleration
The corresponding third speed operation curve of row state continues to run with, and layer stops as of late.
3. the method for excessive heating protection of elevator frequency converter power device according to claim 1, its feature exists
In in reducing the step of carrier frequency of elevator frequency converter, by the carrier frequency reduction of this elevator frequency converter
To preset value 1/4th.
4. the method for excessive heating protection of the elevator frequency converter power device according to any one of claims 1 to 3,
It is characterized in that, after stopping making deceleration of elevator run to closest layer and send command adapted thereto, described overheated guarantor
Maintaining method also includes the interval discriminating step of temperature below: carry out temperature T of elevator frequency converter power device again
Detection, and by obtain temperature T respectively with overheated recovery preset temperature T0, overtemperature protection the first preset temperature
T1 and overtemperature protection the second preset temperature T2 carries out differentiation and compares: if described temperature T is less than described temperature T0,
It is then preset value by the carrier frequency recovery of elevator frequency converter, and by the modulation system of elevator frequency converter by two-phase
Modulation reverts to three-phase modulations；If described temperature T is between described temperature T1 and described temperature T2, then will
The carrier frequency of elevator frequency converter is set to 1/4th of preset value, and by the modulation system of elevator frequency converter
It is set to two-phase modulation；If described temperature T is more than described temperature T2, then stop the output of elevator frequency converter；Its
In, described T2 is more than described temperature T1, and described temperature T1 is more than described temperature T0.
5. the method for excessive heating protection of elevator frequency converter power device according to claim 4, its feature exists
In described temperature range discriminating step specifically includes: the elevator variable frequency that first will obtain in described detecting step again
Temperature T of device power device carries out differentiation with described overheated recovery preset temperature T0 and compares, if described temperature T
It less than described temperature T0, then is preset value by the carrier frequency recovery of elevator frequency converter, and by elevator frequency converter
Modulation system by two-phase modulation revert to three-phase modulations, then return again to the detection again to described temperature T step
Suddenly；If described temperature T is more than or equal to described temperature T0, then this temperature T is entered with described temperature T2
Row differentiation is compared.
6. the method for excessive heating protection of elevator frequency converter power device according to claim 5, its feature exists
In, described temperature T and described temperature T2 are carried out differentiation compare when: if described temperature T be more than described temperature
Degree T2, then stop the output of described elevator frequency converter；If described temperature T is less than or equal to described temperature T2,
Then with described temperature T1, described temperature T is carried out differentiation again to compare.
7. the method for excessive heating protection of elevator frequency converter power device according to claim 6, its feature exists
In, described temperature T is carried out with described temperature T1 again differentiation compare when: if described temperature T is more than described
Temperature T1, then be set to 1/4th of preset value by the carrier frequency of described elevator frequency converter, and by this elevator
The modulation system of frequency converter is set to two-phase modulation, then returns again to the detecting step again to described temperature T；
If described temperature T is less than described temperature T1, then directly return the detecting step again to described temperature T.
8. the overtemperature protection system of an elevator frequency converter power device, it is characterised in that comprising:
Temperature detecting module, for detecting temperature T of elevator frequency converter power device；
Temperature discrimination module, for temperature T of elevator frequency converter power device that will detect and overtemperature protection
First preset temperature T1 carries out differentiation and compares；
Carrier frequency handover module, for the carrier frequency of elevator frequency converter is reduced to below preset value, with
And for being preset value by the carrier frequency recovery of elevator frequency converter；
Modulation system handover module, the modulation system for realizing elevator frequency converter is adjusted in three-phase modulations and two-phase
Switching between system.
9. the overtemperature protection system of elevator frequency converter power device according to claim 8, its feature exists
In, also include rate curve processing module, for when elevator is in Accelerating running state generate First Speed
Operation curve, generates second speed operation curve, is at elevator and subtracts when elevator is in and travels at the uniform speed state
Third speed operation curve is generated, so that elevator runs according to corresponding speed operation curve during speed running status.
10. the overtemperature protection system of elevator frequency converter power device according to claim 8, its feature
Being, described temperature discrimination module is additionally operable to temperature T of elevator frequency converter power device detecting and institute
State overheated recovery preset temperature T0 to carry out differentiation and compare, and for by described temperature T and described overtemperature protection the
Two preset temperature T2 carry out differentiation and compare.
The overtemperature protection system of 11. elevator frequency converter power devices according to claim 8, its feature
It is, also include stopping frequency converter output module, for cutting off the output of elevator frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410525287.XA CN104401829B (en) | 2014-10-08 | 2014-10-08 | The method for excessive heating protection of elevator frequency converter power device and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410525287.XA CN104401829B (en) | 2014-10-08 | 2014-10-08 | The method for excessive heating protection of elevator frequency converter power device and device |
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| Publication Number | Publication Date |
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| CN104401829A CN104401829A (en) | 2015-03-11 |
| CN104401829B true CN104401829B (en) | 2016-11-23 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6630525B2 (en) * | 2015-09-29 | 2020-01-15 | 株式会社日立産機システム | Rotating electric machine and rotating electric machine assembly |
| CN110247370B (en) * | 2018-03-07 | 2021-07-20 | 广东美的生活电器制造有限公司 | Food processor and overheat protection control method and device of power device of food processor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20000018630A (en) * | 1998-09-03 | 2000-04-06 | 이종수 | Velocity controlling method of an alternative current motor |
| US7053587B2 (en) * | 2004-02-10 | 2006-05-30 | Denso Corporation | Apparatus for controlling three-phase AC motor on two-phase modulation technique |
| WO2008136072A1 (en) * | 2007-04-20 | 2008-11-13 | Mitsubishi Electric Corporation | Inverter controller |
| JP4616397B2 (en) * | 2009-02-23 | 2011-01-19 | ファナック株式会社 | PWM rectifier |
| JP5333422B2 (en) * | 2010-12-07 | 2013-11-06 | 株式会社デンソー | Power converter |
| CN102088271B (en) * | 2010-12-20 | 2013-03-20 | 广东美的电器股份有限公司 | Sensor-less sine DC (direct current) variable frequency current sampling method |
| CN102377168B (en) * | 2011-09-30 | 2014-07-16 | 快意电梯股份有限公司 | Protection method for transformer of electric elevator |
| JP5309232B2 (en) * | 2012-02-01 | 2013-10-09 | ファナック株式会社 | PWM rectifier for driving a motor having a modulation type selection unit |
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