CN205911737U - Take rolling door machine circuit of open -phase protection - Google Patents

Abstract

The utility model relates to a take rolling door machine circuit of open -phase protection, include the main circuit that constitutes by circuit breaker, ascending contactor, descending contactor and three -phase AC rolling door machine motor, by three phase bridge, brake the solenoid braking circuit and the control circuit that constitute, the three -phase winding's of motor end is connected respectively to three phase bridge's input among the braking circuit, and brake solenoid is connected to the output, control circuit is including going upward control circuit, down control circuit, going upward A looks phase loss protection circuit and down C looks phase loss protection circuit. The utility model discloses can effectively carry out the open -phase protection to rolling door machine, the solenoid that enables simultaneously to brake gains better brake effect, exchanges and produces, the fault rate is low, energy -conserving.

Description

A kind of door roller circuit with open-phase protection

Technical field

This utility model is related to rolling screen door technical field, more particularly, to a kind of door roller circuit with open-phase protection.

Background technology

Electric rolling door is widely applied in places such as StoreFront, garages, and electric rolling door lifting is driven by door roller, Door roller is driven by motor, is additionally provided with the parts such as brake gear, stop, operation button.A part of existing rolling screen door is by three Cross streams door roller drives, and typically carries out switching on and shutting down using air switch or catalyst, in use, usually due to power supply The reason such as wiring circuit contact is bad causes certain one-phase open circuit in three-phase line, causes three phase alternating current motor to burn, in prior art, Frequently with installing open phase protector in supply line, open-phase protection is carried out to three phase electric machine, but open phase protector is mostly using resistance The electronic original parts such as appearance, because the electronic components such as capacitance-resistance are after working after a while, part characteristic can change, particularly Easily affected by the extraneous such as factor such as thunder and lightning, humidity, led to job insecurity, and once broken down not easy-maintaining.

Secondly, existing three-phase alternating current door roller brake gear is mainly by brake disc, brake block, brake spring and electric magnet (brake solenoid) forms, and under door roller halted state, promotes brake block extruding brake disc to carry out by the thrust of brake spring Brake；During door roller work, electric magnet energising attracts brake block, so that brake disc is separated with brake block and opens brake system, always Door roller is maintained to shut down.As shown in Fig. 2 traditional three-phase alternating current door roller brakes the electric current of solenoid be usually by A phase in three phase mains and zero line input after single-phase rectification bridge stack rectification, and the voltage at brake solenoid two ends is constant , therefore, no matter being the moment that brake system is opened in electric magnet energising, still open the maintenance state after brake system, brake The size of current of solenoid is identical.In fact, before electric magnet is not operating, because the iron core of electric magnet and brake block have one , there is therebetween magnetic gap in fixed distance, the moment of electromagnet action needs larger electric current, after electric magnet closure, unshakable in one's determination and Brake block tightly combines, and forms closed magnetic circuit, and magnetic flux increases, and maintains the electric current of electric magnet closure can greatly reduce.Therefore, There are the following problems for existing three-phase alternating current door roller braking circuit: door roller after use after a while, brake block and stopping Hull makes spacing therebetween increase due to abrasion, and the magnetic force of electric magnet can be made not enough, if increasing brake solenoid Electric current, then can make electric magnet generate heat when working after opening brake system, after the heating unshakable in one's determination of electric magnet, permeability declines, and then magnetic Power declines, lead to cold and heat engine electric magnet magnetic force different it is difficult to control；Secondly as brake solenoid is operated in High voltage, it is little that brake solenoid will be made the many line footpaths of the number of turn, lead to that production difficulty is big, fault rate is high；In addition, brake system System is opened rear braking solenoid current and is not reduced, and wastes electric energy.

Utility model content

This utility model overcomes the deficiencies in the prior art, there is provided the three-phase rolling door that can effectively carry out open-phase protection is dynamo-electric Road, can make simultaneously brake solenoid obtain preferable braking effect, easily produce, fault rate is low, energy-conservation.

This utility model is achieved through the following technical solutions:

A kind of door roller circuit with open-phase protection, intersects including by chopper, upcoming contact device, descending catalyst and three The main circuit that stream door roller motor is constituted, the braking circuit being made up of three-phase commutation bridge, brake solenoid and control circuit； Described chopper input connects a phase, b phase and the c phase of three phase mains respectively；Described upcoming contact device is used for controlled motor and rotates forward Open the door, one end of its three main contacts connects the outfan of chopper respectively, and the other end connects the head of motor three-phase windings respectively End；Described descending catalyst is used for controlled motor reversion and closes the door, and one end of its three main contacts connects the output of chopper respectively End, the other end connects the head end of motor three-phase windings respectively；In described braking circuit, the input of three-phase commutation bridge connects respectively The end of the three-phase windings of motor, outfan connects brake solenoid；Described control circuit includes upload control circuit, descending Control circuit, up a phase open-phase protection circuit and descending c phase open-phase protection circuit；

The c phase of chopper outfan that described upload control circuit includes being serially connected, normally opened up button, descending contact Normally closed first auxiliary contact of device, the b phase of upcoming contact device coil, stop button and chopper outfan；

The a phase of chopper outfan that described lower line control circuit includes being serially connected, normally opened descending button, upcoming contact Normally closed first auxiliary contact of device, the b phase of descending contactor coil, stop button and chopper outfan；

The a phase of chopper outfan that described up a phase open-phase protection circuit includes being serially connected, upcoming contact device are normally opened The zero line of the second auxiliary contact, the first open-phase protection relay coil and power supply；Described first open-phase protection relay normally opened Contact and the parallel connection self-locking of up button；

The c phase of chopper outfan that described descending c phase open-phase protection circuit includes being serially connected, descending catalyst are normally opened The zero line of the second auxiliary contact, the second open-phase protection relay coil and power supply；Described second open-phase protection relay normally opened Contact and descending button parallel connection self-locking.

Operation principle of the present utility model is: when will open rolling screen door, close chopper, presses up button, up control Circuit ON processed, upcoming contact device energized action, its main contacts closure, normally opened auxiliary contact closure, normally closed auxiliary contact disconnect, Main circuit is connected, and motor rotates forward up；After normally closed first auxiliary contact of upcoming contact device disconnect, lower line control circuit is risen mutually Lock acts on, even if now pressing descending button, lower line control circuit also will not be connected；After normally opened second auxiliary contact closure, the One open-phase protection relay energized action, its normally opened contact closes, and to the parallel connection self-locking of up button, now unclamps up button not The operation of motor can be affected；As shut down, press stop button cut-out upload control circuit, upcoming contact device dead electricity, main contacts Disconnect, motor is out of service, and the auxiliary contact of upcoming contact device also all reset, and the first open-phase protection relay also resets.Due to Upload control circuit connects b phase and the c phase of power supply, therefore this biphase open-phase protection that just plays is acted on, as long as there being a phase phase shortage, Upload control circuit just disconnects, and upcoming contact device just cannot obtain electric, and main circuit is just not turned on；First open-phase protection relay pair Power supply a phase plays open-phase protection effect, and during a phase phase shortage, the first open-phase protection relay cannot obtain electric, and its normally opened contact cannot close Close, up button cannot obtain self-locking in parallel, as long as unclamping up button, upload control circuit also and then disconnects, upcoming contact Device cannot energized action.

In the same manner, when will close rolling screen door, close chopper, presses descending button, and lower line control circuit is connected, descending contact Device energized action, its main contacts closure, normally opened auxiliary contact closure, normally closed auxiliary contact disconnect, and main circuit is connected, motor reversal Descending；After normally closed first auxiliary contact of descending catalyst disconnect, upload control circuit is risen with interlocked and uses, even if now pressing Up button, upload control circuit nor connection；After normally opened second auxiliary contact closure, the second open-phase protection relay obtains electric Action, its normally opened contact closes, and to descending button parallel connection self-locking, now unclamps the operation that descending button does not interfere with motor；As Shut down, press the lower line control circuit of stop button cut-out, descending catalyst dead electricity, main contacts disconnects, and motor is out of service, under The auxiliary contact of row catalyst also all reset, and the second open-phase protection relay also resets.Because lower line control circuit connects power supply A phase and b phase, therefore this biphase open-phase protection that just plays is acted on, as long as there being a phase phase shortage, lower line control circuit just disconnects, under Row catalyst just cannot obtain electric, and main circuit is just not turned on；Second open-phase protection relay plays open-phase protection and makees to power supply c phase With, during c phase phase shortage, the second open-phase protection relay cannot obtain electric, and its normally opened contact cannot close, and descending button cannot obtain simultaneously Connection self-locking, as long as unclamping descending button, lower line control circuit also and then disconnects, and descending catalyst cannot energized action.

In the technical program, brake solenoid is equivalent to the three-phase windings series connection with motor, in electric motor starting, starts Electric current is larger, generally the 3～5 of normal work times, and brake solenoid is also 3～5 times of running current, and brake electromagnetism Coil produces larger electromagnetic force makes brake block overcome the thrust of brake spring to separate with brake disc, and opening brake system makes motor Normal start, after electric motor starting, electric current reduces rapidly, and the electric current of brake solenoid also reduces rapidly, but now brake system has been It is in open mode, only need less electric current can be maintained open state, thus can greatly reduce the work(of brake solenoid Rate, makes brake solenoid temperature rise little, and job stability is high；Alternating current is rectified into input brake after unidirectional current through three-phase commutation bridge Solenoid, can make the work of brake solenoid more stable；Due to brake solenoid and the series connection of motor three-phase windings, work Make voltage low, coil turn is few, line footpath can be done greatly, be easier to produce, fault rate is low.

Further, the impedance of described brake solenoid is the 4%～8% of motor three-phase windings impedance.Brake solenoid Impedance be in during this scope and the power of motor affected less, do not interfere with the normal work of motor, brake solenoid can There is provided enough electromagnetic forces, performance reaches preferable state.

Further, it is in series with a normally closed up limitation travel switch in described upload control circuit and lower line control circuit. Arrange up limitation travel switch to be automatically stopped in predetermined position, when up limitation travel switch for when making rolling screen door up During action, normally-closed contact disconnects, and cuts off upload control circuit, and upcoming contact device disconnects cut-out main circuit, motor stalls.

Further, it is in series with a normally closed descending limitation travel switch in described upload control circuit and lower line control circuit. Arrange descending limitation travel switch to be automatically stopped in predetermined position, when descending limitation travel switch for when making rolling screen door descending During action, normally-closed contact disconnects, the lower line control circuit of cut-out, and descending catalyst disconnects cut-out main circuit, motor stalls.

The beneficial effects of the utility model are: upload control circuit and lower line control circuit accessed between phase line, can be right The phase line being accessed plays effective open-phase protection effect；Up a phase open-phase protection circuit is connected a phase and the zero line of power supply, its The normally opened contact of the first open-phase protection relay and the parallel connection self-locking of up button, can play effective open-phase protection effect to a phase；Will Descending c phase open-phase protection circuit connects c phase and the zero line of power supply, the normally opened contact of its second open-phase protection relay and descending press Button parallel connection self-locking, can play effective open-phase protection effect to c phase；Open-phase protection element does not have electronic component, working stability；Will The three-phase windings series connection of brake solenoid and motor, can produce larger electromagnetic force in electric motor starting, even if brake block Remain on because abrasion produces larger gap with brake disc and can open brake system；Brake system opens rear braking solenoid During work, power is little, and temperature rise is little, saves energy；The brake solenoid number of turn is few, and fault rate is low, convenient production.

Brief description

Fig. 1 is circuit diagram of the present utility model.

Fig. 2 is the circuit diagram of traditional three-phase alternating current door roller brake gear.

Specific embodiment

Below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described in detail, so that advantage of the present utility model Can be easier to be readily appreciated by one skilled in the art with feature, thus make apparent clear and definite to protection domain of the present utility model Define.

As shown in figure 1, embodiment of the present utility model, including by chopper qf, upcoming contact device km1, descending catalyst The main circuit that km2 and three-phase alternating current door roller motor m is constituted, the braking being made up of three-phase commutation bridge ur, brake solenoid ya Circuit and control circuit；Described chopper qf input connects a phase, b phase and the c phase of three phase mains respectively；Described up connect Tentaculum km1 is used for controlled motor m and rotates forward enabling, and one end of its three main contacts km1-1 connects the outfan of chopper qf respectively, The other end connects the head end of motor m three-phase windings respectively；Described descending catalyst km2 is used for the reversion of controlled motor m and closes the door, and it three One end of individual main contacts km2-1 connects the outfan of chopper qf respectively, and the other end connects the head of motor m three-phase windings respectively End；In described braking circuit, the input of three-phase commutation bridge ur connects the end of the three-phase windings of motor m respectively, and outfan connects Brake solenoid ya；Described control circuit includes upload control circuit, lower line control circuit, up a phase open-phase protection circuit With descending c phase open-phase protection circuit；

The c phase of chopper qf outfan that described upload control circuit includes being sequentially connected in series, normally opened up button sb1, under The normally closed first auxiliary contact km2-2 of row catalyst km2, upcoming contact device km1 coil, stop button sb3 and chopper qf are defeated Go out the b phase at end；

The a phase of chopper qf outfan that described lower line control circuit includes being sequentially connected in series, normally opened descending button sb2, on The normally closed first auxiliary contact km1-2 of row catalyst km1, descending catalyst km2 coil, stop button sb3 and chopper qf are defeated Go out the b phase at end；

Described up a phase open-phase protection circuit includes a phase of chopper qf outfan, the upcoming contact device being sequentially connected in series The zero line n of the normally opened second auxiliary contact km1-3 of km1, the first open-phase protection relay k1 coil and power supply；Described first phase shortage is protected The normally opened contact k1 and up button sb1 parallel connection self-locking of shield relay；

The c phase of chopper qf outfan that described descending c phase open-phase protection circuit includes being sequentially connected in series, descending catalyst The zero line n of the normally opened second auxiliary contact km2-3 of km2, the second open-phase protection relay k2 coil and power supply；Described second phase shortage is protected The normally opened contact k2 of shield relay and the parallel connection self-locking of descending button sb2.

The operation principle of the present embodiment is: when will open rolling screen door, close chopper qf, presses up button sb1, up Control circuit is connected, upcoming contact device km1 energized action, and its main contacts km1-1 closure, normally opened auxiliary contact km1-3 close, often Close auxiliary contact km1-2 to disconnect, main circuit is connected, motor m rotates forward up；Normally closed first auxiliary contact of upcoming contact device km1 After km1-2 disconnects, lower line control circuit is risen with interlocked and uses, even if now pressing descending button sb2, lower line control circuit is not yet Can turn on；After normally opened second auxiliary contact km1-3 closure, the first open-phase protection relay k1 energized action, its normally opened contact k1 Closure, to the parallel connection self-locking of up button, now unclamps the operation that up button sb1 does not interfere with motor m；As shut down, press Stop button sb3 cuts off upload control circuit, upcoming contact device km1 dead electricity, and main contacts km1-1 disconnects, and motor m is out of service, The auxiliary contact of upcoming contact device km1 also all reset, and the first open-phase protection relay k1 also resets.Due to upload control circuit even Connecing b phase and the c phase of power supply, therefore this biphase open-phase protection that just plays being acted on, as long as there being a phase phase shortage, upload control circuit is just Disconnect, upcoming contact device km1 just cannot obtain electric, and main circuit is just not turned on；First open-phase protection relay k1 is to power supply a phase Play open-phase protection effect, during a phase phase shortage, the first open-phase protection relay k1 cannot obtain electric, and its normally opened contact k1 cannot close, Up button sb1 cannot obtain self-locking in parallel, as long as unclamping up button sb1, upload control circuit also and then disconnects, and up connects Tentaculum km1 cannot energized action.

In the same manner, when will close rolling screen door, close chopper qf, presses descending button sb2, and lower line control circuit is connected, under Row catalyst km2 energized action, its main contacts km2-1 closure, normally opened auxiliary contact km2-3 closure, normally closed auxiliary contact km2-2 Disconnect, main circuit is connected, motor m reversion is descending；After the normally closed first auxiliary contact km2-2 of descending catalyst km2 disconnects, to upper Line control circuit plays interlocked and uses, even if now pressing up button sb1, upload control circuit nor connection；Normally opened second After auxiliary contact km2-3 closure, the second open-phase protection relay k2 energized action, its normally opened contact k2 closes, to descending button Self-locking in parallel, now unclamps the operation that descending button sb2 does not interfere with motor；As shut down, press under stop button sb3 cut-out Line control circuit, descending catalyst km2 dead electricity, main contacts km2-1 disconnects, and motor m is out of service, and descending catalyst km2's is auxiliary Contact is helped also all to reset, the second open-phase protection relay k2 also resets.Because lower line control circuit connects a phase and the b of power supply Phase, therefore acts on to this biphase open-phase protection that just plays, as long as there being a phase phase shortage, lower line control circuit just disconnects, descending catalyst Km2 just cannot obtain electric, and main circuit is just not turned on；Second open-phase protection relay k2 plays open-phase protection effect, c to power supply c phase During phase phase shortage, the second open-phase protection relay k2 cannot obtain electric, and its normally opened contact k2 cannot close, and descending button sb2 cannot obtain Obtain self-locking in parallel, as long as unclamping descending button sb2, lower line control circuit also and then disconnects, and descending catalyst km2 cannot obtain electronic Make.

In the present embodiment, brake solenoid ya is equivalent to the three-phase windings series connection with motor m, when motor m starts, opens Streaming current is larger, generally the 3～5 of normal work times, and brake solenoid ya is also 3～5 times of running current, brake Solenoid ya produces larger electromagnetic force makes brake block overcome the thrust of brake spring to separate with brake disc, opens brake system Motor is made normally to start, after motor m starts, electric current reduces rapidly, the electric current of brake solenoid ya also reduces rapidly, but now Brake system is in open mode, only needs less electric current can be maintained open state, thus can greatly reduce brake electricity The power of magnetic coil ya, makes brake solenoid ya temperature rise little, and job stability is high；Alternating current is rectified into through three-phase commutation bridge ur Input brake solenoid ya after unidirectional current, can make brake solenoid ya work more stable；Due to the solenoid that brakes The three-phase windings series connection of ya and motor m, running voltage is low, and coil turn is few, and line footpath can be done greatly, is easier to produce, fault rate is low.

In the present embodiment, the impedance of described brake solenoid ya is the 6% of the three-phase windings impedance of motor m, and brake electromagnetism The impedance of coil ya is in be affected less, not interfering with the normal work of motor m on the power of motor m during this value, and brake electromagnetism Coil ya can provide enough electromagnetic forces, and performance reaches preferable state.

In the present embodiment, the stop button sb3 in described upload control circuit and lower line control circuit and chopper qf are defeated It is provided with normally closed up limitation travel switch sq1 between the b phase going out end.Arrange up limitation travel switch sq1 to be used for making rolling screen door It is automatically stopped in predetermined position when up, when up limitation travel switch sq1 action, normally-closed contact disconnects, and cut-out is up Control circuit, upcoming contact device km1 disconnects cut-out main circuit, and motor m stops operating.

In the present embodiment, the stop button in described upload control circuit and lower line control circuit and chopper qf outfan B phase between be provided with normally closed descending limitation travel switch sq2.Arrange descending limitation travel switch sq2 to be used for making rolling screen door descending When be automatically stopped in predetermined position, when descending limitation travel switch sq2 action, normally-closed contact disconnect, cut off descending control Circuit, descending catalyst km2 disconnects cut-out main circuit, and motor m stops operating.

The above, specific embodiment only of the present utility model, but protection domain of the present utility model does not limit to In this, any change or replacement expected without creative work, all should cover within protection domain of the present utility model. Therefore, protection domain of the present utility model should be defined by the protection domain that claims are limited.

Claims (4)

1. a kind of door roller circuit with open-phase protection, including by chopper, upcoming contact device, descending catalyst and three-phase alternating current The main circuit that door roller motor is constituted, the braking circuit being made up of three-phase commutation bridge, brake solenoid and control circuit；Institute State a phase, b phase and the c phase that chopper input connects three phase mains respectively；Described upcoming contact device just turns on for controlled motor Door, one end of its three main contacts connects the outfan of chopper respectively, and the other end connects the head end of motor three-phase windings respectively； Described descending catalyst is used for controlled motor reversion and closes the door, and one end of its three main contacts connects the outfan of chopper respectively, The other end connects the head end of motor three-phase windings respectively；It is characterized in that: the input of three-phase commutation bridge in described braking circuit Connect the end of the three-phase windings of motor respectively, outfan connects brake solenoid；Described control circuit includes upload control Circuit, lower line control circuit, up a phase open-phase protection circuit and descending c phase open-phase protection circuit；

The c phase of chopper outfan that described upload control circuit includes being serially connected, normally opened up button, descending catalyst Normally closed first auxiliary contact, the b phase of upcoming contact device coil, stop button and chopper outfan；

The a phase of chopper outfan that described lower line control circuit includes being serially connected, normally opened descending button, upcoming contact device Normally closed first auxiliary contact, the b phase of descending contactor coil, stop button and chopper outfan；

Described up a phase open-phase protection circuit includes a phase of chopper outfan, the upcoming contact device normally opened second being serially connected The zero line of auxiliary contact, the first open-phase protection relay coil and power supply；The normally opened contact of described first open-phase protection relay With the parallel connection self-locking of up button；

Described descending c phase open-phase protection circuit includes the c phase of chopper outfan, the descending catalyst normally opened second being serially connected The zero line of auxiliary contact, the second open-phase protection relay coil and power supply；The normally opened contact of described second open-phase protection relay With descending button parallel connection self-locking.

2. a kind of door roller circuit with open-phase protection according to claim 1 it is characterised in that: described brake electromagnetic wire The impedance of circle is the 4%～8% of motor three-phase windings impedance.

3. a kind of door roller circuit with open-phase protection according to claim 1 it is characterised in that: described upload control electricity It is in series with a normally closed up limitation travel switch in road and lower line control circuit.

4. a kind of door roller circuit with open-phase protection according to claim 1 it is characterised in that: described upload control electricity It is in series with a normally closed descending limitation travel switch in road and lower line control circuit.