CN100471779C - Elevator device - Google Patents
Elevator device Download PDFInfo
- Publication number
- CN100471779C CN100471779C CNB2005100601926A CN200510060192A CN100471779C CN 100471779 C CN100471779 C CN 100471779C CN B2005100601926 A CNB2005100601926 A CN B2005100601926A CN 200510060192 A CN200510060192 A CN 200510060192A CN 100471779 C CN100471779 C CN 100471779C
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- power inverter
- lift appliance
- power
- emergency braking
- lift car
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- Control Of Ac Motors In General (AREA)
- Elevator Control (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention provides an elevator device for avoiding the concentration of burden on part of semiconductor elements even when requiring high torque for a motor in such an almost stopped condition as in the operation test of an emergency stop device for an elevator. A power converter itself is changed from an inverter having two switching elements per one output phase into a power converter in such a system that three or more switching elements per one output phase are used for direct conversion from three-phase alternating current input into three-phase alternating current output. During the operation test of the emergency stop device, namely, in a period when the motor is operated at an extremely low speed in a constrained condition, the conducting condition of the semiconductor elements is controlled so that a actually effective value for a current flowing in the semiconductor elements constituting the same output phase is decentralized to be almost equal. The concentration of burden on part of the semiconductor elements is avoided during the operation test of the emergency stop device for the elevator, offering advantages that the semiconductor elements having small load bearing capacity constitute the power converter.
Description
Technical field
The present invention relates to have the lift appliance of the mechanism that electrical motor is controlled by power inverter, especially relate to a kind of lift appliance, this lift appliance is in the motion test of emergency braking apparatus, flow through specific output phase time when bigger outgoing current is concentrated, the driving power changer is to avoid bearing on the semiconductor element that concentrates on a part.
Background technology
In lift appliance, be provided with emergency braking apparatus, when surpassing a certain speed, lift car braked by this emergency braking apparatus when the velocity anomaly speedup of lift car.Emergency braking apparatus need regularly move test, when the action test, makes the electrical motor that is in halted state substantially export the running of high torque (HT).At this moment, be necessary to make bigger electric current to flow through the specific output phase of power inverter, and this will cause bearing in the semiconductor element that concentrates on a part.For this reason, in traditional lift appliance, this factor of the magnitude of current that flows into when considering the action test, and use the big semiconductor element of the anti-magnitude of current.In order to address this problem, open in the flat 5-294575 communique in the disclosed elevator control gear the patent of invention spy of Japan as conventional art 1, change by the exciting current value when checking and the distribution of torque current value, suppress the increase of outgoing current as much as possible with this.
, the method for conventional art 1 is that the occasion of induction motor (IM) is an object with power inverter institute drive electric motor, and is then inoperative fully for synchronous motor.That is, in synchronous motor, even the exciting current value changes, its output torque also produces change hardly, and its result need make bigger electric current flow through.At this moment, the same with traditional changer, burden concentrates on the semiconductor element of a part.
Summary of the invention
The object of the present invention is to provide a kind of lift appliance, this lift appliance is under the situations such as motion test of carrying out elevator emergency brake device, even when needs make the electrical motor output high torque (HT) that is in halted state substantially, also can avoid bearing situation about concentrating on a part of semiconductor element and take place.
For solving above-mentioned problem, the inverter that power inverter itself is had two on-off elements mutually from each output makes each output into and has on-off element more than three or three mutually, the three-phase alternating current input is directly converted to the power inverter of the Direct Transform mode of three-phase alternating current output, and, in the motion test of emergency braking apparatus, promptly, electrical motor under the confined state with the Ultra-Low Speed action during, conducting state to semiconductor element is controlled, and makes the basic rectangular distribution of current effective value that flows through the semiconductor element that constitutes identical output phase.
A kind of lift appliance comprises the electrical motor that is used to drive elevator at least, is used to control described power of electric motor changer and lift car, it is characterized in that,
Use can be directly converted to the three plase alternating current of certain frequency the power inverter of the three plase alternating current of optional frequency,, from the zone of halted state, conducting state is controlled at described electrical motor so that constitute the homodisperse substantially mode of ON time of each bilateral device of identical output phase with the Ultra-Low Speed action.
A kind of lift appliance comprises the electrical motor that is used to drive elevator at least, is used to control described power of electric motor changer and lift car; Described lift car, having in velocity anomaly increases and the device of the emergency braking braked when surpassing a certain speed, to described lift car, and described lift appliance is characterised in that,
The power inverter of Direct Transform is carried out in use between three plase alternating current, in the motion test of described emergency braking apparatus, so that constitute the homodisperse substantially mode of ON time of each bilateral device of identical output phase conducting state is controlled.
A kind of lift appliance, at least comprise the electrical motor that is used to drive elevator, be used to control described power of electric motor changer and lift car, described lift car have velocity anomaly increase and and the emergency braking apparatus of braking when surpassing a certain speed, to described lift car, described lift appliance is characterised in that
The power inverter of Direct Transform is carried out in use between three plase alternating current, in the motion test of described emergency braking apparatus, in described electrical motor zone with the Ultra-Low Speed action under the state that is limited indirectly, make the basic evenly dispersion of ON time of the bilateral device that constitutes identical output phase, and carry out switch control.
(invention effect)
According to the present invention, can realize following effect, that is, concentrate in a part of semiconductor device, so can constitute power inverter with the little semiconductor element of the anti-magnitude of current owing to can avoid when the elevator emergency brake device motion test, bearing.
Description of drawings
Fig. 1 is the constructional drawing of expression the present invention the 1st embodiment.
Fig. 2 is the details drawing 1 of bidirectional switch part.
Fig. 3 is the details drawing 2 of bidirectional switch part.
Fig. 4 is the structural representation of emergency braking apparatus.
The illustration figure of current status when Fig. 5 is the motion test of expression emergency braking apparatus.
The instruction diagram of current status in emergency braking apparatus motion test when Fig. 6 is to use traditional power inverter.
Switch motion instruction diagram when Fig. 7 is emergency braking apparatus motion test of the present invention.
Among the figure: 1-source power supply, the power circuit portion of 2-power inverter, the control circuit portion of 3-power inverter, 4-electrical motor, 5-input voltage detecting device, 6-detecting device for output current, 7-electrical motor rotary speed detecting device, 8-lift car, 9-counterbalanced weight, 10-main rope sheave, 11-hoist cable, 12-emergency braking apparatus, 13-guide rail, 14-voussoir, 15-spring, the U phase P side on-off element of 16-conventional transducers, the U phase N side reflux diode of 17-conventional transducers, 21-bidirectional switch, 211_a, 211_b-IGBT, 212_a, 212_b-diode, 213_a, 213_b-oppositely intercept IGBT.
The specific embodiment
Followingly embodiments of the invention are described with reference to accompanying drawing.
Fig. 1 represents the lift appliance of the embodiment of the invention 1, and this lift appliance is by control circuit portion 3, electrical motor 4, lift car 8, the counterbalanced weight 9 of the power circuit portion 2 of source power supply device 1, power inverter, power inverter, constitute with electrical motor 4 direct coupled main rope sheaves 10, hoist cable 11.Lift car 8 is equipped with emergency braking apparatus 12, and along guide rail 13 liftings.In addition, in embodiment 1, constitute power inverter by matrix converter, this power inverter can directly be transformed into three-phase alternating current output with the three-phase alternating current input, each output of the power circuit portion 2 of power inverter has three bidirectional switch mutually, adds up to one to have nine bidirectional switch 21.The control circuit portion 3 of this power inverter is according to the input voltage information that obtains from input voltage detecting device 5, from the output current information of detecting device for output current 6 acquisitions and from the rotating speed data of electrical motor rotary speed detecting device 7 acquisitions, the drive signal of calculating bidirectional switch 21.
Fig. 2 and Fig. 3 are the details drawings of bidirectional switch 21.Switch 21 among Fig. 2 is constituted by traditional IGBT211_a, 211_b and diode 212_a, 212_b, and the switch 21 among Fig. 3 is constituted by reverse obstruct IGBT213_a and 213_b.Traditional IGBT211_a, 211_b and reverse obstruct IGBT213_a and the 213_b among Fig. 3 are one way switch among Fig. 2, these switches respectively with two relatively to form constitute, set up bidirectional switch by the mode of on each direction, carrying out independent control.In traditional IGBT211_a, the 211_b of Fig. 2, in order to prevent when voltage reversal applies to damage, diode 212_a and 212_b coupled together make it bear countervoltage.In contrast to this,, then diode need be do not used, the usage quantity of chip can be reduced like this if use reverse obstruct IGBT213_a and 213_b with anti-countervoltage performance.Can know from Fig. 2 and Fig. 3, in each bidirectional switch 21, comprise two on-off elements (traditional IGBT211_a, 211_b or oppositely intercept IGBT213_a and 213_b) respectively.That is, have 18 on-off elements altogether in the power circuit portion 2 of power inverter.
In lift appliance, operated by rotary motion has emergency braking apparatus 12, when this emergency braking apparatus surpasses a certain speed in the velocity anomaly speedup of lift car 8, lift car is carried out emergency braking and it is stopped.Fig. 4 is the detailed structure view of emergency braking apparatus 12.When emergency braking apparatus moved, voussoir 14 was raised mechanism and up promotes, and caused voussoir 14 to contact with guide rail 13, formed the state of clamping guide rail.At this moment, spring 15 is subjected to thrust pressure and is compressed, and its reaction force acts is braked lift car with this on guide rail 13 and wedging face and produce friction force.
When carrying out the motion test of emergency braking apparatus 12, under the state of emergency braking apparatus 12 actions, drive main rope sheave 10, to confirm whether can keep braking mode.Concrete method is, makes emergency braking apparatus 12 actions and fixing lift car 8, and whether under this condition, slip appears in driving motor 4 between main rope sheave 10 and hoist cable 11, obtained keeping with the affirmation braking mode.
The illustration figure of the current status when Fig. 5 is 12 motion tests of expression emergency braking apparatus.The frequency of electric current and the gyrofrequency of electrical motor form the relation of substantially linear.For this reason, under the condition that when motion test of carrying out emergency braking apparatus 12 etc., be fixed at lift car 8, the rotation of electrical motor is suppressed by force, as shown in Figure 5, the frequency of electric current becomes very low (substantially near direct current).And, when carrying out motion test, because electrical motor 4 needs the big torque of output, so the electric current of power inverter output increases.
The instruction diagram of current status in emergency braking apparatus 12 motion tests when Fig. 6 is to use traditional power inverter.As traditional power inverter, generally use each output to have the inverter of two on-off elements mutually.In traditional power inverter, as shown in Figure 4, when flowing through U, ultra-low frequency big current i u exports phase time mutually, the backflow diode 17 that electric current will be concentrated the on-off element 16 that flows through U phase P side or U phase N side (especially, because not rotation of electrical motor 4 is so the output voltage of power inverter diminishes.Therefore, the conducting ratio of the backflow diode 17 of U phase N side increases, and causes electric current more to flow through backflow diode 17 in the concentrated area).At this moment, in the element that flows through of current concentration and heating, fault takes place or the life-span reduces phenomenon occur.So, in traditional power inverter, consider this factor of the magnitude of current that flows through in the action test, need to use the big semiconductor element of the anti-magnitude of current.
Switch motion instruction diagram when Fig. 7 is emergency braking apparatus motion test of the present invention, this figure is the part of extracting the power circuit portion 2 of power inverter (matrix converter) from Fig. 1 out.Matrix converter is a kind of power of importing commercial frequency, it is transformed into the power inverter of exporting behind the power of optional frequency.The voltage in three phases of supposing input side is respectively vr, vs, vt, and then the relation between them satisfies following equation.
(formula 1)
vr＝Vcos(2·π·fc·t) (1)
(formula 2)
vs＝Vcos(2·π·fc·t—2π/3) (2)
(formula 3)
vt＝Vcos(2·π·fc·t+2π/3) (3)
Wherein, V represents the amplitude (for example 282V) of electric current, and fc represents the frequency (for example 50Hz) of power supply.At this moment, when the ON time of supposition vr, vs, vt was respectively t1, t2, t3, then output voltage vu satisfied following equation.
(formula 4)
vu＝(vr·t1+vs·t2+vt·t3)/Ts (4)
Wherein, Ts represents the switch periods (steady state value) of power inverter.
(formula 5)
Ts＝t1+t2+t3 (5)
That is, in matrix converter, the magnitude of voltage of vr, vs, vt is made up, output voltage vu makes the aviation value of magnitude of voltage become the magnitude of voltage that satisfies command request.Wherein, as shown in Figure 4, when the frequency very low (substantially near direct current) of the electric current of power inverter output, the frequency of output voltage vu also very low (being steady state value substantially).From formula 1, formula 2 and formula 3 as can be known, owing to vr, vs, vt are that phase difference is 120 ° a periodic function (cycle=1/ power frequency), be the periodic function of 120 ° power frequency so the size of ON time t1, t2, t3 also is a phase difference.That is, ON time disperseed (even when continuous conducting, ON time also be power cycle 1/3), burden that can bidirectional switch 21 has realized equalization.For this reason, can adopt the little semiconductor element of the anti-magnitude of current to constitute power inverter.
In addition, from formula 4 as can be seen, selecting t1, t2, t3 so that vu when becoming certain value is relatively freer in the selection of t1, t2, t3.Promptly, by selecting to make t1, t2, t3 keep impartial as much as possible, make power understand some reduction, can on rank, make bidirectional switch 21 realize equalizations of burden, so can adopt the littler element of the anti-magnitude of current than the switch periods Ts of power cycle much shorter.
More than, form of implementation of the present invention is described, but the present invention is not subjected to the restriction of above embodiment, self-evident, the present invention can implement various variation examples in the scope that does not change its aim.
Claims (8)
1. lift appliance comprises the electrical motor that is used to drive elevator at least, is used to control described power of electric motor changer and lift car, it is characterized in that,
Use can be directly converted to the three plase alternating current of certain frequency the power inverter of the three plase alternating current of optional frequency,, from the zone of halted state, conducting state is controlled at described electrical motor so that constitute the homodisperse substantially mode of ON time of each bilateral device of identical output phase with the Ultra-Low Speed action.
2. lift appliance according to claim 1 is characterized in that power inverter is a matrix converter.
3. lift appliance comprises the electrical motor that is used to drive elevator at least, is used to control described power of electric motor changer and lift car; Described lift car, having in velocity anomaly increases and the device of the emergency braking braked when surpassing a certain speed, to described lift car, and described lift appliance is characterised in that,
The power inverter of Direct Transform is carried out in use between three plase alternating current, in the motion test of described emergency braking apparatus, so that constitute the homodisperse substantially mode of ON time of each bilateral device of identical output phase conducting state is controlled.
4. lift appliance according to claim 3 is characterized in that power inverter is a matrix converter.
5. lift appliance, at least comprise the electrical motor that is used to drive elevator, be used to control described power of electric motor changer and lift car, described lift car have velocity anomaly increase and and the emergency braking apparatus of braking when surpassing a certain speed, to described lift car, described lift appliance is characterised in that
The power inverter of Direct Transform is carried out in use between three plase alternating current, in the motion test of described emergency braking apparatus, in described electrical motor zone with the Ultra-Low Speed action under the state that is limited indirectly, make the basic evenly dispersion of ON time of the bilateral device that constitutes identical output phase, and carry out switch control.
6. lift appliance according to claim 5 is characterized in that, from the amplitude of power frequency, the ON time of bilateral device is equal substantially.
7. lift appliance according to claim 5 is characterized in that, from the amplitude of the switch periods of power inverter, the ON time of bilateral device is equal substantially.
8. according to any described lift appliance in the claim 5 to 7, it is characterized in that power inverter is a matrix converter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004109576A JP2005289604A (en) | 2004-04-02 | 2004-04-02 | Elevator device |
| JP2004109576 | 2004-04-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1676454A CN1676454A (en) | 2005-10-05 |
| CN100471779C true CN100471779C (en) | 2009-03-25 |
Family
ID=35049224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100601926A Expired - Fee Related CN100471779C (en) | 2004-04-02 | 2005-04-01 | Elevator device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2005289604A (en) |
| CN (1) | CN100471779C (en) |
| HK (1) | HK1080062A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751938B (en) * | 2012-02-09 | 2015-10-14 | 上海交通大学 | A kind of Alternating Current Governor System being applicable to mine fan |
| CN102751945A (en) * | 2012-02-09 | 2012-10-24 | 上海交通大学 | Large-power alternating current-alternating current variable frequency speed regulating system suitable for large-power mine hoist |
| CN102602760B (en) * | 2012-03-07 | 2014-08-20 | 上海新时达电气股份有限公司 | Multifunctional elevator testing and controlling device |
| JP6394849B1 (en) * | 2018-04-10 | 2018-09-26 | 三菱電機ビルテクノサービス株式会社 | Elevator control device that allows the car to function as a scaffold |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001258258A (en) * | 2000-03-09 | 2001-09-21 | Yaskawa Electric Corp | Pwm cycloconverter |
| CN1433132A (en) * | 2001-12-27 | 2003-07-30 | 奥蒂斯电梯公司 | Circular current converter for multiplex pulse width modulation |
-
2004
- 2004-04-02 JP JP2004109576A patent/JP2005289604A/en active Pending
-
2005
- 2005-04-01 CN CNB2005100601926A patent/CN100471779C/en not_active Expired - Fee Related
-
2006
- 2006-03-08 HK HK06102998.2A patent/HK1080062A1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001258258A (en) * | 2000-03-09 | 2001-09-21 | Yaskawa Electric Corp | Pwm cycloconverter |
| CN1433132A (en) * | 2001-12-27 | 2003-07-30 | 奥蒂斯电梯公司 | Circular current converter for multiplex pulse width modulation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1676454A (en) | 2005-10-05 |
| JP2005289604A (en) | 2005-10-20 |
| HK1080062A1 (en) | 2006-04-21 |
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