CN1128091C - Elevator brake control device - Google Patents
Elevator brake control device Download PDFInfo
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- CN1128091C CN1128091C CN 99801706 CN99801706A CN1128091C CN 1128091 C CN1128091 C CN 1128091C CN 99801706 CN99801706 CN 99801706 CN 99801706 A CN99801706 A CN 99801706A CN 1128091 C CN1128091 C CN 1128091C
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- brake
- brake wheel
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Abstract
The present invention provides a brake controller for elevators, which comprises an auxiliary power means to entirely or partially accumulate the energy required in driving a brake coil of an electromagnetic brake when a brake wheel is released. When the brake wheel is released, the accumulated energy excites the brake coil. DC voltage is boosted only when attraction is carried out by a brake, the function of boosting stops after the attraction when braking is in retention, and the voltage of the original DC power source is taken as the control voltage. Therefore, the brake controller can be independent from the source voltage correspondingly to the low voltage trend of the power source under the condition that a power source with enough high voltage for brake release is not prepared. When braking is released, the required energy is offered for the brake coil instantly to carry out brake release.
Description
Technical field
The present invention relates to control the control setup of elevator electromagnetic braking.
Background technology
Fig. 6 is the in the past formation generalized schematic of general lift appliance identical with the scheme that disclosed in the Japanese kokai publication hei 2-110090 communique.
As shown in the figure, lift appliance is installed driving motor 2, brake wheel 3 and the wire rope pulley 4 that constitutes winch on common rotating shaft 1.Motor 2 is electrically connected with circuit for controlling motor 5, and this circuit for controlling motor 5 is through the contact 6 connection three phase mains 7 of electromagnetic contactor.
This magnet stopper 8 by the plunger 10 by the pushing of the elastic force of spring 12, and then compresses brake wheel 3, brake activation by the liner 9 that is installed on the plunger; On the other hand, when brake control circuit 15 excitation restraining coils 14 that the electric current that flows through restraining coil 14 is controlled, the thrust pressure that plunger 10 overcomes spring 12 is attracted, thereby discharges brake wheel 3.
Wire rope pulley 4 built cables 16, an end of this cable 16 connects lift car 17, and its other end connects weight equalizer 18.
Fig. 7 and Fig. 8 are two kinds of circuit diagrams that are shown in the prior art brake control circuit 15 of Fig. 6 block diagram.
Be shown in the brake control circuit 15a of Fig. 7, closed and the contact 19 of electromagnetic contactor (not shown) that when action, open when series electrical magnetic brake 8 discharges between the anode (+) of direct supply (not shown) and negative terminal (-), current probe 22, restraining coil 14, semiconductor switch 20, simultaneously, the group parallel connection of connecting of flywheel diode 21 and current probe 22 and restraining coil 14, and connect step-down control circuit 23 in the base stage of semiconductor switch 20, this circuit is imported as it with the output of current probe 22, by semiconductor switch 20 being led to (ON)/disconnected (OFF) control, thereby be control wave width control coil electric current, reduce the voltage that is applied to coil in fact.
This brake control circuit 15a detects the electric current that flows through restraining coil 14 by current probe 22, and the chopping way that adopts semiconductor switch 20 to carry out on/off control is controlled braking current.
Be shown in the control of braking electric current 15b of Fig. 8, between power positive end (+) and negative terminal (-), connect with same contact 19 shown in Figure 7, be shown in Fig. 6 switch 13 contact 13a and be shown in the restraining coil 14 of Fig. 6, and then, shunt resistance 24 on the contact 13a of switch 13, simultaneously, shunt resistance 25 on restraining coil 14.
Here, in order to overcome the thrust pressure of spring 12, must flow through big electric current on the restraining coil 14, be attracted up to plunger 10, thereby contact 13a is in closure state and makes restraining coil 14 direct connection power supplys, in case and plunger 10 is attracted, even coil current reduces also can keep plunger 10 and is the attraction state, utilize this specific character, contact 13a becomes opening.
With contact 13a parallel resistor 24; play and limit the current-limiting resistance effect of flowing through restraining coil 14 electric currents when plunger 10 attracts contact 13a to discharge; with restraining coil 14 parallel resistor 25; absorb the coil protect resistance effect that is stored at the electromagnetic energy in the restraining coil 14 when playing the coil current blocking-up, thereby by electromagnetic contactor 13a and current-limiting resistance 24 control brake electric currents.
Above-mentioned Fig. 7 and constituted mode shown in Figure 8 all when drg attracts, make restraining coil 14 direct connection direct supplys, flow through big electric current, thereby produce big magnetic flux, make drg flash liberation (brake hop).In case after drg discharges, thereby reduce the electric current that the voltage that adds to restraining coil 14 two ends limits the coil that flows by semiconductor switch 20 or resistance 24, keep attraction to drg, the result has suppressed restraining coil 14 heating and coil power dissipations.
But, there is following defective in the brake control circuit of prior art: the direct supply that has only triangular web as control power supply, and this power supply is not had when discharging the required sufficiently high voltage of magnet stopper, brake control circuit in the past not only can not the flash liberation drg, and under worst situation even can not release the brake (plunger is not attracted), thereby elevator can not start.
Especially recent, elevator also develops into control setup miniaturization and low energy consumption stage, is difficult to have the sort of in the past various control power supplys that must adopt the large commercial voltage transformer, add control power supply lower voltage, thereby the problems referred to above is inevitable.
And then, the problems referred to above are described in detail as follows.
Past, elevator control gear is made of relay mostly, control by relay sequence, thereby employed voltage to provide with the solenoid operation be the higher voltage of prerequisite, the braking of winch is also by solenoid operation, by the power drives of identical voltage.
But, along with control setup makes progress to electronization, replaced by computer controlled, its control voltage step-down, when using the magnet coil of low voltage, it is big that the coil current during attraction becomes relatively, pressure drop to the supply line of coil increases, supply unit also must have big current capacity, at this moment, easily produces the attraction situation of difficult.
And then, being in application to the voltage of restraining coil 14 when low, the electric current that flows through also reduces, and is slow in one's movements thereby its suction reduces, the damage control performance.For this reason, though can be preserved for the power source special of restraining coil,, must cut down power type in today of the equal electronization of nearly all circuit.
The present invention makes in view of the above problems, its purpose is to provide a kind of brake controller of elevator, essential enough high-tension power supply and when having only a DC power system when tending to lower voltage along with power supply thereby not having braking discharge, also can instantaneously discharging that glancing impact does not rely on power line voltage provide required energy, thereby brake release movement to restraining coil.
Invention discloses
A kind of brake controller of elevator of the present invention comprises: the control device of control lift car lifting; Brake tool, it has the driving that is arranged on the winch that makes the lift car lifting with the brake wheel on the electric machine rotational axis, brake described driving and rotate by the described brake wheel of liner clamping on the plunger that is installed in the spring force pushing with motor, by the restraining coil of excitation on the described plunger, make described plunger overcome the spring thrust pressure and be attracted and discharge brake wheel; According to the instruction from described control device, thereby the braking that makes described restraining coil excitation discharge described brake wheel discharges means; The accessory feed means are put aside when described brake wheel discharges and are driven described restraining coil institute's energy requirement or this energy part, when described brake wheel discharges, utilize the energy of savings to make described restraining coil excitation.
Described accessory feed means, the energy of putting aside before described brake tool provides described brake wheel to discharge when brake wheel discharges makes described restraining coil excitation, thereby attracts described plunger, and described brake wheel is discharged.
When described brake wheel discharges, release order according to braking, provide power supply by described accessory feed means to described restraining coil, when keeping described brake wheel and discharge, after back and the actual release of brake wheel were released order in described braking, discharging means by described braking provided power supply to described restraining coil.
This braking force control system also comprises the release detector that detects described brake wheel release, utilizing described accessory feed means to provide the predetermined amount of time of power supply to described restraining coil when described brake wheel discharges, is to be subjected to time period till excitation and described release detector detect the moment that described brake wheel discharges from sending the moment to described restraining coil that described braking releases order.
Described accessory feed means comprise the means of boosting that input supply voltage is raise, and the cond that is charged to the voltage that is raise by the described means of boosting; The electric current of the boosted voltage that on described restraining coil provides based on described cond, is filled and the electric current of the described means of boosting of flowing through.
Described accessory feed means when brake wheel discharges, provide the 1st boost voltage to restraining coil; When keeping braking to discharge, apply 2nd voltage lower than described the 1st boost voltage to restraining coil.
A kind of brake controller of elevator of another invention of the application, it comprises: the control device of control lift car lifting; Brake tool, it has the driving that is arranged on the winch that makes the lift car lifting with the brake wheel on the electric machine rotational axis, brake described driving and rotate by the described brake wheel of liner clamping on the plunger that is installed in the spring force pushing with motor, by the restraining coil of excitation on the described plunger, make described plunger overcome the spring thrust pressure and be attracted and discharge brake wheel; Discharge means by the braking that makes described restraining coil excitation discharge described brake wheel; Braking power, it has the accessory feed means, and these accessory feed means connect described braking through the closed contact that releases order according to braking and discharge means, and the power line voltage that raises and provide as required; The instruction means of boosting, thus from send braking release order the drg action begin to discharge to drg only during, instruct described braking power, provide the power supply that boosts to described braking release means.
Described accessory feed means when brake wheel discharges, provide the 1st boost voltage to restraining coil; When keeping braking to discharge, apply 2nd voltage lower than described the 1st boost voltage to restraining coil.
Summary of drawings
Fig. 1 is the formation block diagram of the brake controller of elevator of the invention process form 1.
Fig. 2 is the physical circuit figure of brake controller of elevator shown in Figure 1.
Fig. 3 is the mode chart of Fig. 2 each several part.
Fig. 4 is the forming circuit figure of the brake controller of elevator of the invention process form 2.
Fig. 5 is the mode chart of Fig. 4 each several part.
Fig. 6 is the formation generalized schematic of the prior art general lift appliance identical with institute's announcement scheme in the Japanese kokai publication hei 2-110090 communique.
Fig. 7 is the circuit diagram of an example of braking force control system shown in Figure 6.
Fig. 8 is the circuit diagram of another example of braking force control system shown in Figure 6.
The optimal morphology that carries out an inventionExample 1
Fig. 1 is the formation block diagram of the brake controller of elevator of example 1, mainly is the cooresponding part of function with the brake control circuit 15 that is shown in Fig. 6.
Among Fig. 1, the 26th, have driving motor 2 equally with the device that is shown in Fig. 6, brake wheel 3, wire rope pulley 4, and the winch that makes lift car 17 liftings, on this winch 26, have magnet stopper 8 and detect the release detector 27 that brake wheel 3 discharges (identical) with 13 function among Fig. 6, liner 9 clamping brake wheels 3 on the plunger 10 of the elastic force pushing of this magnet stopper 8 by being installed in spring 12, thereby braking motor 2 rotations, simultaneously, be attracted around the thrust pressure that the restraining coil 14 on the plunger 10 makes plunger 10 overcome spring 12 by excitation, thereby discharge brake wheel 3.
The 28th, have the circuit for controlling motor 5 that is shown in Fig. 6 and the controller of brake control circuit 15 functions concurrently, the 29th, the power supply same voltage lower direct supply used with computer controlled, the 30th, thus means discharged according to the braking that the instruction excitation restraining coil 14 that comes self-controller 28 discharges brake wheels, the 31st, savings brake wheel 3 drives 14 energy requirements of restraining coil or this energy part and utilizes this savings energy to make the accessory feed means of restraining coil 14 excitations when brake wheel 3 discharges when discharging.
Fig. 2 is the physical circuit that is shown in the braking force control system of Fig. 1.
Among Fig. 2, the braking that is shown in Fig. 1 discharge means 30 by when discharging detector 27 and detect brake wheels 3 and discharge from the braking deenergized contact 30a of the instruction circuit-closing contacts of the detector 28 of this detection signal of input, be connected on the positive terminal (+) of direct supply 29 and the power supply switching contactor 30b between the negative pole end (-) with this braking deenergized contact 30a, be connected on the diode 30f between direct supply 29 positive and negative terminals and discharge contactless switch contact 30c with its normal opened contact 30d and restraining coil 14 according to the braking that comes self-controller 28 braking that makes junction closure of releasing order, the flywheel diode 30e in parallel with restraining coil 14 constitutes.
The normally closed contact 30c of above-mentioned power supply switching contactor 30b, and this contact the boost charge circuit 31a and the chemical capacitor 31b that are connected on jointly between the positive and negative two ends of direct supply 29 constitute the accessory feed means 31 that are shown in Fig. 1.Cond 31b and the group parallel connection of connecting of braking release contactless switch contact 30c and restraining coil 14.
Then, the each several part mode chart with reference to being shown in Fig. 3 illustrates the action of the brake controller of elevator of above-mentioned formation.
At first, the braking of controller 28 release order send before, magnet stopper 8 does not discharge, braking discharges detector contact 30a and opens, thereby power supply switching contactor 30b does not have excitation, so cond 31b forms boost voltage Vc through the voltage Vp charging by direct supply 29 of the path of the negative pole end (-) of the normally closed contact 31c-boost charge circuit 31a-of positive terminal (+)-power supply switching contactor of direct supply 29 cond 31b-direct supply 29.
Under this state, (Fig. 3 a) constantly when releasing order to send braking at controller 28, braking discharges contactless switch contact 30c closure, apply boost voltage to the restraining coil in parallel with cond 31b 14, thus, electric current flows to restraining coil 14 from cond 31b, make restraining coil 14 excitations, thereby the plunger 10 that is shown in Fig. 6 overcomes the thrust pressure of spring 12 to be attracted, and thus, discharges brake wheel 9.
In this circuit, except that cond 31b, the boost charge circuit 31a also provide electric current to restraining coil 14, thereby promote release movement.At this moment, by limiting the electric current (not shown) that this boost charge circuit 31 provides, also can reduce the instantaneous current load of mains side when discharging.
Like this, when braking discharged, braking discharged detector contact 30a closure, and power supply switching contactor 30b is by excitation (moment b of Fig. 3).By this power supply switching contactor 30b excitation, its normally closed contact 31b opens, normal opened contact 30d closure.Thereby power supply (anode) side of boost charge circuit 31a disconnects, and the diode 30f that cond 31b uses through anti-reverse electric current connects power supply (positive terminal) side.
Therefore, the voltage of cond reduces because of discharge, is substantially equal to power line voltage Vp.And flow to the electric current of restraining coil 14, reduce owing to condenser voltage reduces.Finally, remain the constant current that depends on power line voltage.
Thereafter, when controller 28 brake offs released order, braking discharged contactless switch contact 30c and opens (Fig. 3 is c constantly), stopped to provide power supply to restraining coil 14, and savings is consumed at the energy of restraining coil 14 electric current by the diode connected in parallel 30e that flows through.
Discharge by the cancellation braking, braking discharges detector contact 30a opens, and removes power supply switching contactor 30b excitation (Fig. 3 is d constantly).Thus, normally closed contact 31c is closed once more, and boost charge circuit 31a works, thus cond 31b boost charge once more.
The effect and the effect of above-mentioned example 1 are described below.
Essential energy mainly was divided into two classes when at first, braking discharged.That is, the braking drive division is made of restraining coil 14 and the plunger 10 that this coil attracts usually, comprises being used to attract plunger 10 energy that makes it to move and the energy that is used for continuing to attract plunger 10, and the former must be bigger than latter energy certainly.
In example 1, instantaneous (schedule time: the pull up time of plunger 10) required energy or its portion of energy are temporarily put aside in accessory feed means 31 braking to be discharged (being attracted by restraining coil 14), thus, direct supply 29 itself can be the lower power supply of voltage.
Method as temporary transient savings energy has following two kinds.
A kind of is the method for putting aside institute's energy requirement before the braking release movement in advance, and another kind of method is temporarily to put aside energy and add that this part is to help to brake release movement when release movement.The latter's a example is the work of accessory feed means, and the impedance that the circuit that contains restraining coil is seen from power supply reduces, and the result can increase the electric current that flows through restraining coil.In other words, this is a kind of method that adds to restraining coil 14 after by accessory feed means 31 power supply being boosted.
In the example 1, put aside institute's energy requirements in accessory feed means 31 before discharging braking, thereby needn't in the time that braking discharges, utilize this braking to discharge required energy of short time immediately, and can be in advance in the power supply capacity of considering to provide long-time the savings energy, thereby capacity capable of reducing power source or reduce the size that the power supply that rises to braking release means 30 from power supply is used electric wire.
Along with the lower voltage of control circuit, to the voltage step-down that braking release means 30 provide, braking discharges required electric current to be increased, the result, the supply current rated value increases, and the power supply from power supply 29 to braking release means 30 when power supply capacity becomes Datong District becomes big etc. with linear dimension, needs expense.Therefore, required energy (electric current) and when braking discharges, discharging when discharging with the braking of little electric current savings in advance, can suppress increases because of instantaneous current causes the mains connection set capacity.
In example 1, its formation makes restraining coil 14, when discharging, braking provides power supply by accessory feed means 31, and self-retention has discharged to keep through the schedule time and provides power supply by braking release means 30 when discharging, thereby the circuit relevant with 30 power supplies of braking release means only need the basic power supply capacity that keeps drg, has its circuit and constitute simply and the little advantage of capacity.
In example 1, on drg, be provided with and detect the release detector 27 that braking discharges, braking utilizes the schedule time of accessory feed means 31 to be meant the time of releasing order and to the excitation restraining coil above-mentioned release detector 27 actions being ended from sending when discharging, before braking discharges, need to use accessory feed means 31, can be after detecting release withdraw from use accessory feed means 31 immediately.
Thereby if put aside the mode of energy in advance, but bottom line uses accessory feed means 31 and makes to discharging the little energy that braking is put aside next time.Even only when discharging, utilize in the mode of accessory feed means 31, can be after confirming to discharge withdraw from use accessory feed means immediately, thereby make equipment value time rating that constitutes accessory feed means 31 less.
In example 1, accessory feed means 31 are to have boost function, the voltage that the power line voltage of exportable ratio input is high, thereby needn't control in restraining coil 14 sides, the voltage that adds to restraining coil 14 by rising is easy to increase the drive current of restraining coil 14, as a result, can in the short period, release energy to restraining coil 14 injections.Example 2
Fig. 4 is the circuit diagram of formation of the brake controller of elevator of expression example 2.The brake controller of elevator that is shown in Fig. 4 is represented to constitute with example 1 cooresponding circuit in Fig. 2, in addition, identical with the example 1 that is shown in Fig. 1, have direct supply 29, be shown in drive motor 2, brake wheel 3, the wire rope pulley 4 of Fig. 6, and have cage lifter car 17 winch 26, magnet stopper 8, be shown in the controller 28 of Fig. 1.
Direct supply 29 have the high-voltage anode terminal that is used for drive coil (+H), be used to control power supply the low voltage positive terminal (+L) and negative terminal (-), (+L) voltage can be by for example (+H) voltage carries out the step-down generation, also can be shared with the LVPS that is used for electronic circuits such as computer controlled with the high-voltage anode end to coil drive with the low voltage positive terminal for the control power supply.
Among Fig. 4, the 32nd, it is identical with the circuit formation of the 15a of brake control circuit in the past that is shown in Fig. 7 that circuit constitutes, and all is the braking release means that discharge brake wheel 3 by excitation restraining coil 14.
These braking release means 32 by the transistor 20 of control on/off (copped wave), detect the current probe 22, in parallel with the group of connecting of restraining coil 14 and current probe 22 and improve flywheel diode 21, step-down control circuit 23 formations of current continuity of the electric current flow through restraining coil 14, the output of step-down control circuit 23 received current detectors 22 produces and offers the on-off signal of transistor 20 base stages so that coil current is carried out current control.
The collecting electrode of transistor 20 connects restraining coil 14, and emitter connects the negative pole end (-) of direct supply, step-down control circuit 23 be arranged on direct supply the low pressure positive terminal (+L) and between the negative pole end (-).
The 33rd, braking power, it has the accessory feed means, these means are through releasing order into the electromagnetic contactor contact 19b of closure state according to the braking that comes self-controller (identical with the controller 28 that is shown in Fig. 1), connect above-mentioned braking and discharge means 32, and can raise as required and offer the power line voltage of these braking release means 32.
The anode of above-mentioned diode 33e connects the collecting electrode of transistor 33c, and negative electrode connects boost control circuit 33b and electromagnetic contactor contact 19b.
The 34th, the instruction means of boosting are sent braking certainly and are released order and begin action braking to drg and discharge to end and provide booster power to above-mentioned braking power 33 indications to braking release means 32.
This boost instruction means 34 by an end connect high-tension positive terminal (+release order H) and with the braking of the same origin self-controller of above-mentioned electromagnetic contactor contact 19b and become the electromagnetic contactor contact 19a of closure state, the normally closed contact 13a of the switch that links to each other with the other end of electromagnetic contactor contact 19a and when braking discharges, open with plunger 10 interlocks of magnet stopper 8, the current-limiting resistance 34a that connects this normally closed contact 13a other end, base stage connects the other end of this resistance 34a and the transistor 34b that emitter connects the negative pole end (-) of direct supply, be arranged on direct supply the low voltage positive terminal (+L) and the load resistor 34c between the collecting electrode of transistor 34b constitute.
Then, with reference to the each several part mode chart that is shown in Fig. 5, the brake controller of elevator of example 2 is described.
When according to from the elevator starter instruction of the same controller 28 (not shown) of example shown in Figure 11, the output braking is released order, when the contact 19a in the instruction means of boosting thus 34 is closed, a point current potential (point of connection of contact 19a and contact 13a), as shown in Figure 5, change with contact 19a action.B point current potential (point of connection of contact 13a and resistance 34a) as shown in Figure 5, is the pulse type waveform, only is attracted and is (+H) level during contact 13a open to end at the plunger 10 that is closed to magnet stopper 8 from contact 19a.Equally, the collecting electrode of transistor 34b be c point current potential also as shown in Figure 5, be the pulse pattern of reverse logic.
For this reason, during c point current potential was " L " level, transistor 33a ended, and the output of boost control circuit 33b is applied to the base stage of transistor 33c.Thereby the drive signal of transistor 33c (d point current potential) as shown in Figure 5, only is being closed to contact 13a open period from contact 19a, and promptly only the time before plunger 10 attracts just permits and applies, thereby exports on/off signal described later.
Here, the action of simple declaration braking power 33.
Put aside energy in transistor 33c conduction period at choke coil 33c, between the transistor 33c off period, through flywheel diode 33e, discharge to electrolytic condenser 33f, thus, transmit energy, output voltage (e point voltage) is increased to than the direct supply high pressure anode (voltage that+H) current potential is high (savings partly produces at the energy of chokes Figure 33 d and boosts).
On/off dutycycle by control transistor 33c can be controlled to expectation value to boost voltage, thereby as so-called boost chopper action.
As mentioned above, the switch on/off of boost control circuit 33b control transistor 33c makes the both end voltage of chemical capacitor 33f be certain predetermined voltage.
Thereby as shown in Figure 5, the output voltage waveforms of braking power 33 only boosts to expectation voltage when magnet stopper attracts.Flow through electric current (output of the current probe 22) f of restraining coil 14, the step-down control circuit 23 of braking release means 32 is failure to actuate when attracting because of magnet stopper, transistor 20 also is a conducting state, the vdc that braking power 33 boosts directly adds to restraining coil 14, so as shown in Figure 5, instantaneous current rises, rapid release brake wheel 3.
Here, when transient changing (distortion) is arranged in the restraining coil electric current was plunger 10 action by magnet stopper 8, the inductance of restraining coil 14 changed and causes.Under the situation of the mode in the past of additional brake power supply 33 not, the waveform of restraining coil electric current f as shown in phantom in Figure 5 is such, and braking current slowly rises, and discharging to braking needs the long period, and perhaps in some occasion, braking can not discharge.
After in case magnet stopper discharges, transistor 33a conducting, thus transistor 33c ends, and boost action stops, thus, the high potential of the former power line voltage of braking power 33 outputs (+H).And then, braking release means 32, by by the high potential of 23 pairs of former direct supplys of step-down control circuit (+H) carry out step-down control, supply current is restricted to can keeps the holding current that flows through restraining coil 14, thereby keep magnet stopper.
According to above-mentioned example 2, even only be a DC power system at the control power supply, and this power supply be needn't prepare the magnet stopper flash liberation time under the required sufficiently high voltage condition, also can the flash liberation braking.Self-evident, but although braking power 33 continuous actions, (during elevator starter) can proceed boost action when braking discharged, but can cause problems such as also producing unnecessary power loss and radiation EMC noise when elevator stops, the maintenance glancing impact that needn't boost originally simultaneously, consume suitable electric power in the transistor of braking power and the flywheel diode, thereby from the power saving viewpoint, this situation is also bad.
In example 2, circuit constitutes only to make and boosts when drg attracts, thereby can obtain because of extremely low power saving of loss and low noise braking force control system unnecessary power consumption and EMC noise suppression to bottom line.
In example 2, the accessory feed means needn't be set in addition, with the partial function of braking power 33, promptly stop the function of boosting as required, just may command adds to the voltage of restraining coil 14, i.e. control current.
Though above-mentioned narration is to carry out with the situation of contact 19b connecting simultaneously according to release order closed contact 19a and restraining coil action of the braking in the instruction means 34 of boosting, but contact 19a is connected prior to contact 19b, thereby condenser voltage is raise.
In the 2nd example, also have step-down control circuit 23, make above-mentioned two-stage voltage control become three grades of controls, thereby can further seek energy-saving effect.
In the above-mentioned narration, the boost control circuit 33b detector action when braking discharges of always working, but also can be only apply the voltage that boosts sending in the initial schedule time of releasing order.Though some is different with this circuit, if stored charge (energy) in cond in advance, charge stored discharges to restraining coil when braking discharges, and promotes release movement, also can obtain same effect.
Make boost control circuit 33b produce the 1st boost voltage before also can adopting braking to discharge the detector action, produce thereafter low than the 1st boost voltage, keep the optimum voltage that braking discharges (with respect to power line voltage (+H) can be boost voltage, also but step-down voltage) this mode.Thereby, at this moment, do not need step-down control circuit 23.
According to example 2, comprise the accessory feed means in the braking power 33, only at the scheduled period output boost voltage that braking discharges, the result can increase the electric current that flows through restraining coil 14 to braking power 33, thereby promotes the braking release movement.Boost instruction and braking when releasing order when sending simultaneously to braking power 33, and the defunctionalization of energy can not suppress the mains side electric current when storage braking in advance discharged.
Because when braking discharges, apply the 1st boost voltage to restraining coil, when keeping braking to discharge, apply 2nd voltage lower (with reference to braking power 33 outputs that are shown in Fig. 5) than above-mentioned the 1st boost voltage, so when keeping drg, also can not only add power supply voltage, and power line voltage boosted (or step-down) is after-applied.That is, the power line voltage of this device may not adapt to all brakings, difference according to circumstances, the voltage of have relatively high expectations sometimes (or lower).
Keep the function that the 2nd voltage is constant potential if having, then needn't in applying voltage, add and consider the required surplus of voltage fluctuation, and can set the minimum voltage of permission for, thereby the electric current that provides to restraining coil can be provided, as a result, can reduce the energy consumption that discharges the braking generation.Moreover the transistor turns rate of the chopper circuit of reduction braking power 33 reduces the effect that element heats up with abundant reduction voltage thereby can obtain.
Industrial applicability
As mentioned above, the present invention can provide a kind of brake controller of elevator, and this device is low corresponding to power supply The pressureization tendency, though when not having releasing brake the required and sufficiently high power supply of voltage, only have again one In the situation of dc source, when braking discharges, can not rely on supply voltage, to restraining coil wink yet The time provide institute's energy requirement to brake release movement.
Claims (8)
1. brake controller of elevator, it comprises:
The control device of control lift car lifting;
Brake tool, it has the driving that is arranged on the winch that makes the lift car lifting with the brake wheel on the electric machine rotational axis, brake described driving and rotate by the described brake wheel of liner clamping on the plunger that is installed in the spring force pushing with motor, by the restraining coil of excitation on the described plunger, make described plunger overcome the spring thrust pressure and be attracted and discharge brake wheel;
According to the instruction from described control device, thereby the braking that makes described restraining coil excitation discharge described brake wheel discharges means;
It is characterized in that this control setup also comprises:
The accessory feed means are put aside when described brake wheel discharges and are driven described restraining coil institute's energy requirement or this energy part, when described brake wheel discharges, utilize the energy of savings to make described restraining coil excitation.
2. brake controller of elevator as claimed in claim 1 is characterized in that, described accessory feed means, the energy of when brake wheel discharges, before described brake tool provides described brake wheel to discharge, putting aside, make described restraining coil excitation, thereby attract described plunger, described brake wheel is discharged.
3. brake controller of elevator as claimed in claim 1, it is characterized in that, when described brake wheel discharges, release order according to braking, provide power supply by described accessory feed means to described restraining coil, when keeping described brake wheel and discharge, after back and the actual release of brake wheel were released order in described braking, discharging means by described braking provided power supply to described restraining coil.
4. brake controller of elevator as claimed in claim 3, it is characterized in that, also comprise and detect the release detector that described brake wheel discharges, utilizing described accessory feed means to provide the predetermined amount of time of power supply to described restraining coil when described brake wheel discharges, is to be subjected to time period till excitation and described release detector detect the moment that described brake wheel discharges from sending the moment to described restraining coil that described braking releases order.
5. brake controller of elevator as claimed in claim 1 is characterized in that, described accessory feed means comprise the means of boosting that input supply voltage is raise, and the cond that is charged to the voltage that is raise by the described means of boosting; The electric current of the boosted voltage that on described restraining coil provides based on described cond, is filled and the electric current of the described means of boosting of flowing through.
6. brake controller of elevator as claimed in claim 1 is characterized in that, described accessory feed means when brake wheel discharges, provide the 1st boost voltage to restraining coil; When keeping braking to discharge, apply 2nd voltage lower than described the 1st boost voltage to restraining coil.
7. brake controller of elevator, it comprises:
The control device of control lift car lifting;
Brake tool, it has the driving that is arranged on the winch that makes the lift car lifting with the brake wheel on the electric machine rotational axis, brake described driving and rotate by the described brake wheel of liner clamping on the plunger that is installed in the spring force pushing with motor, by the restraining coil of excitation on the described plunger, make described plunger overcome the spring thrust pressure and be attracted and discharge brake wheel;
Discharge means by the braking that makes described restraining coil excitation discharge described brake wheel;
It is characterized in that this control setup also comprises:
Braking power, it has the accessory feed means, and these accessory feed means connect described braking through the closed contact that releases order according to braking and discharge means, and the power line voltage that raises and provide as required;
The instruction means of boosting, thus from send braking release order the drg action begin to discharge to drg only during, instruct described braking power, provide the power supply that boosts to described braking release means.
8. brake controller of elevator as claimed in claim 7 is characterized in that, described accessory feed means when brake wheel discharges, provide the 1st boost voltage to restraining coil; When keeping braking to discharge, apply 2nd voltage lower than described the 1st boost voltage to restraining coil.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99801706 | 1999-01-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1302276A CN1302276A (en) | 2001-07-04 |
| CN1128091C true CN1128091C (en) | 2003-11-19 |
Family
ID=29433264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99801706 Expired - Fee Related CN1128091C (en) | 1999-01-25 | 1999-01-25 | Elevator brake control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1128091C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1544148B1 (en) * | 2002-09-27 | 2012-10-17 | Mitsubishi Denki Kabushiki Kaisha | Brake controller of elevator |
| JP2012020825A (en) * | 2010-07-13 | 2012-02-02 | Toshiba Elevator Co Ltd | Brake control device of elevator |
| KR101787226B1 (en) * | 2013-04-24 | 2017-10-18 | 미쓰비시덴키 가부시키가이샤 | Brake device, elevator hoist using same, and method for adjusting damping reaction force of brake device |
| DE202017005334U1 (en) * | 2017-10-17 | 2019-01-18 | Wittur Holding Gmbh | Device for controlling a speed limiter belt and electronic speed limiter |
| US20220081253A1 (en) * | 2018-12-20 | 2022-03-17 | Inventio Ag | Method and brake controller for controlling a brake in an elevator system |
| DE102020117349A1 (en) * | 2020-07-01 | 2022-01-05 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Control for an electromagnetic holding brake |
-
1999
- 1999-01-25 CN CN 99801706 patent/CN1128091C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1302276A (en) | 2001-07-04 |
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