CN102001561B - Elevator control device - Google Patents
Elevator control device Download PDFInfo
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- CN102001561B CN102001561B CN201010260130.0A CN201010260130A CN102001561B CN 102001561 B CN102001561 B CN 102001561B CN 201010260130 A CN201010260130 A CN 201010260130A CN 102001561 B CN102001561 B CN 102001561B
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Abstract
The invention provides an elevator control device capable of making a carriage (2) lift by the drive of a three-phase alternating current motor (1), comprising a two-axle/three-axle converter (12) for supplying the voltage for making the current for default phase determination flow to each phase of the three-phase alternating current motor; a default phase abnormity detector (23) for detecting the default phase abnormity of the three-phase alternating current motor based on the voltage value of each phase of the three-phase alternating current motor along with the voltage supplying work by the two-axle/three-axle converter; and a running control part (30) for immediately stopping the running start work of the carriage when the default phase abnormity detector detects the default phase abnormity.
Description
Technical field
The present invention relates to the to possess three-phase alternating current motor control setup of elevator of (motor), relates in particular to the control setup that detects the elevator that the phase shortage of three-phase alternating current motor is abnormal.
Background technology
Conventionally, in elevator, possesses three-phase alternating current motor as the driver element of car (elevator car).This three-phase alternating current motor has three phase windings, and this three-phase alternating current motor rotates by order three phase windings being carried out to excitation.But, if because of some reasons such as vibrations, even if phase shortage occurs among three-phase mutually, also cannot be rotated control with the speed of being scheduled to.Therefore, car can travel with abnormal speed, thereby in dangerous state.
Fig. 8 means the figure of structure example of the control setup of elevator in the past.In addition, DE11～13 in figure represent subtracter, and AD11 represents adder.In addition, " SPC " in figure is rate control instruction, and " WTC " is load equalization torque (torque) current-order.These instructions, from being equivalent to the not shown control part output of travelling of main control unit.
This elevator control gear, has three-phase alternating current motor 31 as electrical motor, be provided with comprise inverter (inverter) 34 each control convenience as electric motor drive unit.Three-phase alternating current motor 31 has U phase, V phase and W this three phase winding mutually, and three-phase alternating current motor 31 is rotated by order this three phase winding being carried out to excitation.In addition, in the example of Fig. 8, the state that phase shortage has occurred U is mutually shown.
On the S. A. of this three-phase alternating current motor 31, rotation is freely provided with pulley (sheave) 31a, and to be equipped with magnet stopper 31b to connecting the mode that the S. A. of this pulley 31a and three-phase alternating current motor 31 brakes.On this pulley 31a, volume hangs with hawser (rope) 31c, in one end of this hawser 31c, links and has car 32, at the other end, links and has balance weight (counter weight) 33.
If three-phase alternating current motor 31 is driven, pulley 31a rotation, accompanies therewith, and car 32 and balance weight 33 are carried out lifting work via hawser 31c in well-bucket mode.In addition, now, the state of magnet stopper 31b in separating from pulley 31a.
In addition, rotatable phase detector 35 is installed on the S. A. of three-phase alternating current motor 31.This rotatable phase detector 35, the phase place (being called rotatable phase θ 0 below) of the rotor of detection three-phase alternating current motor 31.By the detected rotatable phase θ 0 of this rotatable phase detector 35, by differentiator 36, by differential, and be fed (feedback) to speed control system as the speed signal V that represents present speed.
On the other hand, be provided with current probe 40a, 40b forming in the U phase of three-phase alternating current motor 31, V phase, the W any two-phase (in this case U phase and W phase) among mutually.Current probe 40a is arranged at U phase side, and current probe 40b is arranged at W phase side.If supply with and drive three-phase alternating current motor 31 by the voltage of inverter 34, at U, go up mutually mobile electric current " Iu " and detect by current probe 40a, at W, go up mutually mobile electric current " Iw " and detect by current probe 40b.
In addition, if three-phase alternating current motor 31 has, the current value of three-phase being added up to, is zero such characteristic.Therefore,, about the electric current " Iv " of V phase, can calculate according to following formula (10).
Iv=-Iu-Iw ... formula (10)
3 axle/2 axle convs 41, based on by current probe 40a, 40b respectively detected electric current " Iu ", " Iw " and go up mutually the phase place (below be called current phhase θ) of mobile electric current at each of three-phase alternating current motor 31, three shaft currents that are directed to U phase, V phase, W phase are converted to 2 shaft currents, and this 2 shaft current comprises torque current " Iq " and as the flux current " Id " of its orthogonal axes electric current.
So that " Id " among these 2 converted shaft currents follows the command value Id of d shaft current
*(=0), make " Iq " follow the above-mentioned torque current instruction " Iq from speed controller 38
*" mode, by current controller 39, calculate respectively 2 shaft voltage instruction " Vd
*", " Vq
*".
In the present embodiment, as the torque current of the output from speed controller 38 with from the torque current instruction " Ibl of first-order lag low-pass filter 45
*" being imported into adder AD11, the operation result being generated by this adder AD11 is as torque current instruction " Iq
*" be output to subtracter DE13.
And, by subtracter DE13, calculate torque current " Iq " from 3 axle/2 axle convs 41 with respect to the torque current instruction " Iq from adder AD11
*" difference, this result of calculation is output to current controller 39.
In addition, by subtracter DE12, calculate the above-mentioned command value " Id with respect to d shaft current from the torque current " Id " of 3 axle/2 axle convs 41
*" difference, this result of calculation is output to current controller 39.
In addition, 2 axle/3 axle convs 42, by the 2 above-mentioned shaft voltage instruction " Vd from current controller 39
*", " Vq
*" be converted to 3 shaft voltage instruction " Vu
*", " Vv
*", " Vw ", and export inverter 34 to.
Inverter 34 for example uses the methods such as PWM (Pulse Width Modulation, pulse width modulation), and three-phase alternating current motor 31 is supplied with to needed voltage.
In addition, in the bottom of car 32, be provided with the detectors of load 43 for detection of the load-carrying in car.By the detected load signal Wt of this detectors of load 43, be provided for weight comparator 44.Weight comparator 44, calculates the weight difference of car 32 and balance weight 33 based on this load signal Wt.If load equalization torque current instruction " WTC " becomes effectively, pass through first-order lag low-pass filter (low-pass filter) 45 as balancing moment current-order " Ibl with the corresponding overbalance torque of described weight difference
*" be output to adder AD11.
In the elevator control gear of present embodiment, as the abnormal inscape of the phase shortage for detection of three-phase alternating current motor 31, possesses velocity anomaly detector 46.
If there is phase shortage in three-phase alternating current motor 31, three shaft voltage Vu, Vv, Vw can be as the torque current instruction " Iq being generated by speed controller 38
*" like that from inverter 34 outputs.At velocity anomaly detector 46, be judged as the speed command V of speed command arithmetic and logic unit 37
*value and the difference of value that represents the speed signal V of rotative speed surpass certain value, cannot Negotiation speed control and make the rotative speed V of three-phase alternating current motor 31 follow speed command " V
*" situation under, by the torque current instruction " Iq being generated by speed controller 38
*" (error) signal " SP_ERR " of makeing mistakes, the emergent stopping travelling of execution car 32.
Like this, in the past, in the situation that abnormal speed more than predetermined value detected in the travelling of car, be judged to be three-phase alternating current motor generation phase shortage, thereby made car emergent stopping.
In addition, as the technology of carrying out abnormality detection before starting travelling of car, known have for example No. 2501109 communique of Japanese Patent.In this communique, to being arranged at the output voltage of the conv (converter) in electric power supply system, monitor, at this output voltage, become predeterminated level above in the situation that, be judged to be three-phase alternating-current supply phase shortage has occurred.
As described above, in the abnormal method of the phase shortage of the middle detection three-phase alternating current motor of travelling of car, owing to detecting emergent stopping when abnormal, the passenger in car likely can fall down, with danger.In addition, although there is communique described above to detect abnormal method like that before travelling of car starts, the method is to detect the abnormal method of phase shortage of three-phase alternating-current supply, and is not to take that three-phase alternating current motor is object.
Summary of the invention
The object of the present invention is to provide can to detect reliably the phase shortage of three-phase alternating current motor before starting abnormal and carry out the control setup of the elevator that safety and the high operation of reliability control travelling.
The present invention is applied to the control setup of elevator, the control setup of this elevator makes car carry out lifting work by the driving of three-phase alternating current motor, possess: 2 axle/3 axle convs, it is before travelling of described car starts, to respectively supplying with mutually for making phase shortage confirm the voltage of the current flowing of use of described three-phase alternating current motor; Phase shortage abnormality detection unit, it is accompanied by the voltage supply work of being undertaken by described 2 axle/3 axle convs, the magnitude of voltage of each phase based on described three-phase alternating current motor, the phase shortage that detects described three-phase alternating current motor is abnormal; And the control unit that travels, it forbids that immediately travelling of described car start working abnormal to phase shortage by described phase shortage abnormality detection unit inspection in the situation that.
Accompanying drawing explanation
Fig. 1 means the figure of structure of control setup of the elevator of embodiments of the present invention;
Fig. 2 is flow process (flow chart) figure of the flow process of the processing when illustrating that the elevator of embodiments of the present invention travels;
Fig. 3 is for the diagram of circuit of the flow process that the phase shortage confirmation of the elevator of embodiments of the present invention is processed is described;
Fig. 4 is the sequential chart of each signal of the three-phase alternating current motor of the elevator of embodiments of the present invention when cab in the situation of phase shortage not occurring travelling;
Fig. 5 is the sequential chart of each signal of the three-phase alternating current motor of the elevator of embodiments of the present invention when phase shortage in the situation of phase shortage not occurring confirming;
Fig. 6 is the sequential chart of each signal of the three-phase alternating current motor of the elevator of embodiments of the present invention when cab in the situation of phase shortage having occurred travelling;
Fig. 7 is the sequential chart of each signal of the three-phase alternating current motor of the elevator of embodiments of the present invention when phase shortage in the situation of phase shortage having occurred confirming;
Fig. 8 means the figure of structure example of the control setup of elevator in the past.
The specific embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described.
Fig. 1 means the figure of structure example of control setup of the elevator of embodiments of the present invention.In addition, DE1～3 in figure represent subtracter, and AD1～2 represent adder.In addition, " SPC " is rate control instruction, and " WTC " is the instruction of load equalization torque current, and " CHK " is galvanoscopy instruction.These instructions, from being equivalent to control part 30 outputs of travelling of main control unit.
The control setup of the elevator of present embodiment, has three-phase alternating current motor 1 as electrical motor, as the electric motor drive unit of this three-phase alternating current motor 1, is provided with each control convenience that comprises inverter 4.Three-phase alternating current motor 1, have U phase, V phase, W this three phase winding mutually, and three-phase alternating current motor 1 is rotated by order this three phase winding being carried out to excitation.In addition, in the example of Fig. 1, the state that phase shortage has occurred U is mutually shown.Here, setting three-phase alternating current motor 1 is the synchronous motor that possesses permanent magnet.
On the S. A. of this three-phase alternating current motor 1, rotation is freely provided with pulley 1a, and to be equipped with magnet stopper 1b to connecting the mode that the S. A. of this pulley 1a and three-phase alternating current motor 1 brakes.On this pulley 1a, volume hangs with hawser 1c, in one end of this hawser 1c, links and has car 2, at the other end, links and has balance weight 3.
If three-phase alternating current motor 1 is driven, pulley 1a rotation, accompanies therewith, and car 2 and balance weight 3 are carried out lifting work via hawser 1c in well-bucket mode.In addition, now, the state of magnet stopper 1b in separating from pulley 1a.
In addition, rotatable phase detector 5 is installed on the S. A. of three-phase alternating current motor 1.This rotatable phase detector 5, the rotatable phase θ 0 of detection three-phase alternating current motor 1.By the detected rotatable phase θ 0 of this rotatable phase detector 5, by differentiator 6, by differential, and be fed back to speed control system as the speed signal V that represents present speed.
On the other hand, be provided with current probe 10a, 10b forming in the U phase of three-phase alternating current motor 1, V phase, the W any two-phase (in this case U phase and W phase) among mutually.Current probe 10a is arranged at U phase side, and current probe 10b is arranged at W phase side.If supply with and drive three-phase alternating current motor 1 by the voltage of inverter 4, at U, go up mutually mobile electric current " Iu " and detect by current probe 10a, at W, go up mutually mobile electric current " Iw " and detect by current probe 10b.
In addition, in three-phase alternating current motor 1, if had, the current value of three-phase being added up to, is zero such characteristic.Therefore,, about the electric current " Iv " of V phase, can calculate according to following formula (1).
Iv=-Iu-Iw ... formula (1)
3 axle/2 axle convs 11, the current phhase θ of each phase based on by current probe 10a, 10b difference detected electric current " Iu ", " Iw " and three-phase alternating current motor 1, three shaft currents that are directed to U phase, V phase, W phase are converted to 2 shaft currents, and this 2 shaft current comprises torque current " Iq " and its orthogonal axes electric current " Id ".Change type is now expressed as to following formula (2).
In the present embodiment, as the torque current of the output from speed controller 8 with from the torque current instruction " Ibl of first-order lag low-pass filter 15
*" being imported into adder AD1, the operation result being generated by this adder AD1 is as torque current instruction " Iq
*" be output to subtracter DE3.For the work of first-order lag low-pass filter 15, after be described.
And, by subtracter DE3, calculate torque current " Iq " from 3 axle/2 axle convs 11 with respect to the above-mentioned torque current instruction " Iq from adder AD1
*" difference, this result of calculation is output to current controller 9.
In addition, by subtracter DE2, calculate the above-mentioned command value " Id with respect to d shaft current from the torque current " Id " of 3 axle/2 axle convs 11
*" difference, this result of calculation is output to current controller 9.
In addition, 2 axle/3 axle convs 12, by the 2 above-mentioned shaft voltage instruction " Vd that calculated by current controller 9
*", " Vq
*" be converted to 3 shaft voltage instruction " Vu
*", " Vv
*", " Vw ", and export inverter 4 to.That is, 2 axle/3 axle convs 12 are before travelling of car 2 starts, and each of three-phase alternating current motor 1 supplied with mutually for making phase shortage confirm the voltage feed unit of voltage of the current flowing of use.Change type is now expressed as to following formula (3).
In addition, in the bottom of car 2, be provided with the detectors of load 13 for detection of the load-carrying in car.By the detected load signal Wt of this detectors of load 13, be provided for weight comparator 14.Weight comparator 14, calculates the weight difference of car 2 and balance weight 3 based on this load signal Wt.If load equalization torque current instruction " WTC " becomes effectively, by first-order lag low-pass filter 15, as balancing moment current-order " Ibl* ", be output to adder AD1 with the corresponding overbalance torque of described weight difference.
And then, in the control setup of the elevator of present embodiment, as the abnormal inscape of the phase shortage for detection of three-phase alternating current motor 1, possess d shaft current instruction switch 21, first-order lag low-pass filter 22 and phase shortage anomaly detector 23.
D shaft current instruction switch 21, is checking that instruction " CHK " becomes in actv. situation, switches to constant current value " Ichk0 " by the instruction of d shaft current.First-order lag low-pass filter 22 is in order to arrange the phase delay of this constant current value " Ichk0 ".
In such structure, in the control setup of the elevator of present embodiment, before travelling of elevator starts, that is to say at car 2 and be about to before each floor starts to travel, for all of three-phase alternating current motor 1, supply with mutually for making the mobile voltage of constant current beyond zero.And, from this voltage, supply with start through certain hour after, whether the magnitude of voltage that checks each phase of three-phase alternating current motor 1 surpasses is that phase shortage is judged by a reference value of setting in advance.
Starting of why supplying with from voltage wait for through certain hour, be because will flow in three-phase alternating current motor 1 each current stabilization going up mutually state under check.Even if in the situation that the voltage that the result checking is each arbitrary phase in has mutually surpassed a reference value, be also judged to be three-phase alternating current motor 1 phase shortage has occurred, thereby forbid that immediately travelling of car 2 start working.
In the present embodiment, in phase shortage is confirmed, because torque with three-phase alternating current motor 1 is produced there is no the electric current of direct relation is that d shaft current flows, so substantially can not produce torque when phase shortage is confirmed.But, in the situation that three-phase alternating current motor 1 is synchronous motor as previously mentioned, due to the phase place of electric current mobile when phase shortage is confirmed, in permanent magnet, produce sometimes torque.
Particularly, if make the current flowing of Iu=I, Iv=-I/2, Iw=-I/2,, when current phhase θ=0 °, in permanent magnet, will produce maximum torque.Because this torque produces, car 2 can produce vibration, thereby brings sense of discomfort to passenger.
So the elevator control gear of present embodiment, by utilize first-order lag low-pass filter 22 to make to flow in the phase delay of electric current of each phase of three-phase alternating current motor 1 when phase shortage is confirmed, suppresses the generation of torque.
In addition, three-phase alternating current motor 1 can be also induction motor (IM).
Below, the work for the treatment of about the elevator control gear of present embodiment at length describes.
Fig. 2 is the diagram of circuit of the flow process of the processing when illustrating that the cab of the elevator of embodiments of the present invention is travelled.Fig. 3 is for the diagram of circuit of the flow process that the phase shortage confirmation of the elevator of embodiments of the present invention is processed is described.In addition, the processing shown in these diagram of circuits is carried out substantially under the control of the control part 30 that travels as main control unit.
(a) there is not the situation of phase shortage in three-phase alternating current motor 1
Fig. 4 is the sequential chart of each signal of the three-phase alternating current motor 1 of the elevator of embodiments of the present invention when car in the situation of phase shortage not occurring travelling.Fig. 5 is the sequential chart of each signal of the three-phase alternating current motor 1 of the elevator of embodiments of the present invention when phase shortage in the situation of phase shortage not occurring confirming.
Now, the car 2 of setting elevator stops at certain floor.Now, so that the mode that car 2 does not move to overbalance direction, magnet stopper 1b and pulley 1a butt.Under this state, as shown in Figure 4, if from control part 30 output of travelling travel sign on " RUN ", the sign on " RUN " of travelling becomes effectively (step S1), travel control part 30 as shown in Fig. 4 is same, to check that instruction " CHK " is made as effectively (step S2), and start phase shortage and confirm to process (step S3).
As shown in the diagram of circuit of Fig. 3, the control part 30 that travels, in phase shortage is confirmed to process, first, as initial setting, switches to 0 ° (step S31) by the current phhase θ of three-phase alternating current motor 1.This is because the characteristic based on three-phase alternating current motor 1 by current phhase θ is set as to 0 °, makes electric current go up mutually equably and flow at each.
And the control part 30 that travels, utilizes d shaft current instruction switch 21, is constant current value " Ichk0 " by current switching mobile in three-phase alternating current motor 1.Now, in order to prevent that above-mentioned torque from producing, make constant current value " Ichk0 " by first-order lag low-pass filter 22, as phase shortage, detect current-order " Ichk
*" export speed control system (step S32) to.
This phase shortage detects current-order " Ichk
*", be input to adder AD2 together with the instruction that is 0 with electric current, and the operation result being generated by this adder AD2 is as d shaft current instruction " Id
*" be provided for current controller 9.In addition, offer equally the q shaft current instruction " Iq of current controller 9
*" be 0.Thus, via current controller 9,2 axle/3 axle convs 12, inverter 4, three-phase alternating current motor 1 is supplied with for making the constant current required voltage (step S33) that flows.
In the situation that there is not phase shortage, as shown in Figure 5, the U phase current instruction Iu that the formula below use (4) is obtained
*, the V phase current instruction Iv that obtains by following formula (5)
*and the W phase current instruction Iw obtaining by following formula (6)
*in situation about being output, in forming each winding of the U phase of three-phase alternating current motor 1, V phase, W phase, U phase current Iu, the V phase current Iv obtaining by following formula (8) obtaining by following formula (7) and the W phase current Iw obtaining by following formula (9) flow.
Iu
*=Id
*cos0=Id
*formula (4)
Iv
*=Id
*cos (0-2 π/3)=-Id
*/ 2 formulas (5)
Iw
*=Id
*cos (0-4 π/3)=-Id
*/ 2 formulas (6)
Iu=Id
*cos0=Id
*formula (7)
Iv=Id
*cos (0-2 π/3)=-Id
*/ 2 formulas (8)
Iw=Id
*cos (0-4 π/3)=-Id
*/ 2 formulas (9)
Now, if three-phase alternating current motor 1 is the synchronous motor that possesses permanent magnet, if the phase place of this permanent magnet, be rotatable phase θ close to 0 ° or 180 °, can produce torque, if but rotatable phase θ close to 90 ° or 270 °, can not produce torque.
From phase shortage, detecting current-order " Ichk
*" output start through certain hour " tchk " ("Yes" of step S34) afterwards, phase shortage anomaly detector 23, judgement 3 shaft voltage instruction " Vu
*", " Vv
*", " Vw
*" whether in predetermined normal range, at this, judge whether the absolute value of 3 shaft voltage instructions is less than or equal to a reference value Vchk (step S35, S37, S38).
At this, if the voltage of any phase in three-phase is all less than or equal to a reference value Vchk ("No" of step S38), phase shortage anomaly detector 23 is judged to be three-phase alternating current motor 1 phase shortage does not occur, and error signal " ERR " is made as to invalid (step S39).That is, phase shortage anomaly detector 23, is the magnitude of voltage of each phase based on three-phase alternating current motor, detects the abnormal phase shortage abnormality detection unit of phase shortage of three-phase alternating current motor 1.
And the control part 30 that travels, makes current phhase θ revert to the detected value (step S40) of rotatable phase detector 5, and makes d shaft current instruction " Id
*" value converge on 0 (step S41), and finish phase shortage confirmation work.
In addition, the magnetic pole phase in figure, represents the existing phase place of permanent magnet (position).Magnetic pole phase is substantially identical with rotatable phase, means the phase place of the position of physics.In addition, because current phhase controlled in the mode of synchronizeing with magnetic pole phase, so sometimes also referred to as control phase.
The control part 30 that travels, is accompanied by the end that phase shortage is confirmed, it is invalid if check as shown in Figure 4, instruction " CHK " becomes, and, as shown in Fig. 4 is same, load equalization torque current instruction " WTC " is made as to effectively (step S4).Follow in this, corresponding to car 2 with the overbalance torque of the weight difference of balance weight 3 by first-order lag low-pass filter 15 and as balancing moment current-order " Ibl
*" be output (step S5).
Balancing moment current-order " Ibl
*", as previously mentioned as q shaft current instruction " Iq
*" be provided for current controller 9.If this balancing moment current-order " Ibl
*" determine, rate control instruction " SPC " becomes effectively (step S6) as shown in Figure 4.Thus, speed command arithmetic and logic unit 7 is started with speed controller 8, with the speed drive three-phase alternating current motor 1 (step S7) of being scheduled to.Now, magnet stopper 1b, in open state, is accompanied by the driving of three-phase alternating current motor 1, and car 2 moves on ascent direction or descent direction via hawser 1c.
If car 2 arrives object floor and stops ("Yes" of step S8), travel control part 30 as shown in Figure 4, it is invalid that the sign on of travelling " RUN ", load equalization torque current instruction " WTC " and rate control instruction " SPC " are made as, and prepares travel (step S9) next time.
(b) there is the situation of phase shortage in three-phase alternating current motor 1
Fig. 6 is the sequential chart of each signal of the three-phase alternating current motor 1 of the elevator of embodiments of the present invention when car in the situation of phase shortage having occurred travelling.Fig. 7 is the sequential chart of each signal of the three-phase alternating current motor 1 of the elevator of embodiments of the present invention when phase shortage in the situation of phase shortage having occurred confirming.
As mentioned above, when car 2 travels, as shown in Figure 6, if control part 30 is exported the sign on " RUN " (step S1) of travelling from travelling, travel control part 30 as shown in Figure 6, to check that instruction " CHK " is made as effectively (step S2), and start phase shortage and confirm to process (step S3).
The control part 30 that travels, in phase shortage is confirmed to process, first, as initial setting, switches to 0 ° (step S31) by the current phhase θ of three-phase alternating current motor 1.Then, the control part 30 that travels, utilizes d shaft current instruction switch 21, is constant current value " Ichk0 ", and makes it by first-order lag low-pass filter 22 current switching mobile in three-phase alternating current motor 1, as phase shortage, detects current-order " Ichk
*" export speed control system (step S32) to.
This phase shortage detects current-order " Ichk
*", be input to adder AD2 together with representing " 0 " of electric current 0, and the operation result being generated by this adder AD2 is as d shaft current instruction " Id
*" be provided for current controller 9.Q shaft current instruction " Iq
*" be 0.Thus, via current controller 9,2 axle/3 axle convs 12, inverter 4, three-phase alternating current motor 1 is supplied with for making the constant current required voltage (step S33) that flows.
From phase shortage, detecting current-order " Ichk
*" output start through certain hour " tchk " ("Yes" of step S34) afterwards, phase shortage anomaly detector 23, confirms 3 shaft voltage instruction " Vu
*", " Vv
*", " Vw
*" whether in predetermined normal range, whether be less than or equal to a reference value Vchk (step S35, S37, S38).
At this, at the voltage instruction " Vu of for example U phase
*" absolute value | Vu| has surpassed in the situation of a reference value Vchk ("Yes" of step S35), is judged to be U phase shortage has occurred mutually, as shown in Figure 7 error signal " ERR " is made as effectively (step S36).
In the situation that like this there is phase shortage in U mutually, as shown in Figure 7, because the electric current I u of U phase remains 0 and do not follow U phase current instruction Iu
*, and go up mutually in V phase and W the electric current that only flows and produced by the alternate difference of potential of V phase-W, these electric currents do not follow V phase current instruction Iv
*, W phase current instruction Iw
*so, 2 shaft voltage instruction Vd
*and Vq
*increase (dispersing).
Its result, 3 shaft voltage instruction " Vu
*", " Vv
*", " Vw
*" absolute value also along with the process of time, disperse as shown in Figure 7, and surpass a reference value Vchk.
In addition, the control part 30 that travels, at the voltage instruction " Vw of W phase
*" absolute value | Vw| has surpassed in the situation of a reference value Vchk ("Yes" of step S38), is judged to be W phase shortage has occurred mutually, and error signal " ERR " is made as to effectively (step S36).
In addition, the control part 30 that travels, about the voltage instruction " Vv of V phase
*" absolute value | Vv|, even go up mutually and do not have piezoelectric detector at V, also can be according to the characteristic of " Iu " of three-phase alternating current motor 1+" Iv "+" Iw "=0, as absolute value | Vv|=|Vu+Vw| calculates.Therefore, the control part 30 that travels, in the situation that | the value of Vu+Vw| has surpassed a reference value Vchk ("Yes" of step S37), is judged to be V phase shortage has occurred mutually, and error signal " ERR " is made as to effectively (step S36).
The control part 30 that travels, after the phase shortage that detects three-phase alternating current motor 1 is abnormal, makes current phhase θ revert to the detected value (step S40) of rotatable phase detector 5, and makes d shaft current instruction " Id
*" converge on 0 (step S41).
At this, because error signal " ERR " is effective as mentioned above, so travel, as shown in Figure 6, the sign on of travelling " RUN " and to check that instruction " CHK " is made as invalid, forbids next time and later travelling start working (step S43) control part 30.
That is, the control part 30 that travels, is detecting phase shortage abnormal in the situation that, forbids that at once travelling of described car start working.Now, elevator control gear, preferably, carries out alarm by the situation that message shows and/or sound etc., to three-phase alternating current motor 1, phase shortage has occurred.
As described above, the elevator of embodiments of the present invention, at each floor, before car 2 starts to travel, makes electric current flow on mutually and prior confirmation phase shortage is abnormal at each of three-phase alternating current motor 1.Thus, can avoid, at three-phase alternating current motor 1, the danger that under the state of phase shortage, car 2 is travelled has occurred, can carry out the operation that safety and reliability are high and control.
In a word, it is constant that the present invention is not defined in the respective embodiments described above former state, but implementation phase can in the scope that does not depart from its purport, to constitutive requirements, be out of shape and specialize.In addition, utilize the proper combination of disclosed a plurality of constitutive requirements in the respective embodiments described above, can form variety of way.For example, also can from the whole constitutive requirements shown in embodiment, omit several constitutive requirements.And then, also can make the constitutive requirements proper combination of different embodiments.
Claims (7)
1. a control setup for elevator, its driving by three-phase alternating current motor (1) makes car (2) carry out lifting work, it is characterized in that possessing:
2 axle/3 axle convs (12), it,, before travelling of described car starts, is 3 shaft voltage instructions by 2 shaft voltage instruction maps, to respectively supplying with mutually for making phase shortage confirm the voltage of the current flowing of use of described three-phase alternating current motor;
Phase shortage anomaly detector (23), it is accompanied by the voltage supply work of being undertaken by described 2 axle/3 axle convs, the magnitude of voltage of each phase based on described three-phase alternating current motor, the phase shortage that detects described three-phase alternating current motor is abnormal; And
The control part (30) that travels, it is being detected phase shortage abnormal in the situation that by described phase shortage anomaly detector, forbid that immediately travelling of described car start working.
2. the control setup of elevator according to claim 1, is characterized in that:
Described phase shortage anomaly detector (23), checks the magnitude of voltage of each phase being detected by voltage detection unit, and in the situation that the magnitude of voltage of at least 1 phase surpasses predefined a reference value, is judged to be described three-phase alternating current motor phase shortage has occurred.
3. the control setup of elevator according to claim 1 and 2, is characterized in that:
Described phase shortage anomaly detector (23), starts, through after certain hour, to check the magnitude of voltage of each phase being detected by voltage detection unit in the voltage supply work from being undertaken by described 2 axle/3 axle convs.
4. the control setup of elevator according to claim 1, is characterized in that:
Described three-phase alternating current motor is induction motor (IM).
5. the control setup of elevator according to claim 1, is characterized in that:
Along with the supply of the voltage being undertaken by described 2 axle/3 axle convs, at the electric current of the mobile phase shortage confirmation use of respectively going up mutually of described three-phase alternating current motor, be for making the rotative speed of described three-phase alternating current motor follow the orthogonal axes electric current of the torque current of target velocity.
6. the control setup of elevator according to claim 1, is characterized in that:
Described three-phase alternating current motor is the synchronous motor that possesses permanent magnet.
7. the control setup of elevator according to claim 6, is characterized in that, also possesses:
Low-pass filter (15);
Wherein, by the phase place that goes up mutually the electric current that mobile phase shortage confirms at each of described three-phase alternating current motor is postponed by described low-pass filter, suppress to result from the torque of described permanent magnet.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2009200971A JP5473491B2 (en) | 2009-08-31 | 2009-08-31 | Elevator control device |
| JP200971/2009 | 2009-08-31 |
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| CN102001561A CN102001561A (en) | 2011-04-06 |
| CN102001561B true CN102001561B (en) | 2014-04-02 |
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| JP5314103B2 (en) * | 2011-09-30 | 2013-10-16 | 東芝シュネデール・インバータ株式会社 | Permanent magnet synchronous motor drive device |
| JP5779530B2 (en) * | 2012-03-23 | 2015-09-16 | 株式会社日立産機システム | Power converter |
| CN103482441A (en) * | 2013-09-10 | 2014-01-01 | 天津豪雅科技发展有限公司 | Novel elevator power supply control device |
| WO2016113769A1 (en) * | 2015-01-13 | 2016-07-21 | 三菱電機株式会社 | Elevator control apparatus |
| JP6610427B2 (en) * | 2016-05-20 | 2019-11-27 | スズキ株式会社 | Motor control device |
| CN107248724B (en) * | 2016-07-22 | 2018-11-13 | 奥克斯空调股份有限公司 | Power phase shortage detection method when a kind of compressor of air conditioner operation |
| JP2019140778A (en) * | 2018-02-08 | 2019-08-22 | パナソニックＩｐマネジメント株式会社 | Motor control device, open-phase detection device, and open-phase detection method for motor control device |
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| JP5473491B2 (en) | 2014-04-16 |
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