CN102295242B - Elevator-brake mute-operation control circuit - Google Patents
Elevator-brake mute-operation control circuit Download PDFInfo
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- CN102295242B CN102295242B CN 201110250609 CN201110250609A CN102295242B CN 102295242 B CN102295242 B CN 102295242B CN 201110250609 CN201110250609 CN 201110250609 CN 201110250609 A CN201110250609 A CN 201110250609A CN 102295242 B CN102295242 B CN 102295242B
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- 230000005284 excitation Effects 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 abstract description 5
- 239000010703 silicon Substances 0.000 abstract description 5
- 239000003990 capacitor Substances 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 4
- 230000010363 phase shift Effects 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
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Abstract
The invention relates to an elevator-brake mute-operation control circuit, which comprises parts, such as a time-delay circuit, an exciting-voltage pulse-width modulating circuit, a modulation-switching circuit, a maintaining-voltage pulse-width modulating circuit, a direct-current stabilized-voltage power supply, a rectifying and wave-filtering circuit, a direct-current wave chopper, a freewheeling circuit, an exciting-voltage tracking and holding circuit, a maintaining-voltage tracking and holding circuit and the like. In the invention, direct-current wave-chopping type adjustment for a direct-current working voltage applied to a magnetic-device coil is carried out through a pulse-width modulation-controlling mode, so that low-frequency electromagnetic noise is eliminated, the mute operation of an elevator brake is realized, the use requirements of a machine-room-less tractor brake are met, meanwhile, various potential safety hazards produced by using a controlled-silicon voltage-regulating circuit are also eliminated, an exciting voltage and a maintaining voltage on the magnetic-device coil are kept unchanged when an electric-network voltage is changed, and the elevator-brake mute-operation control circuit is stable and reliable in working.
Description
Technical field
The present invention relates to a kind of control circuit of brake electromagnet, specifically a kind of elevator-brake mute-operation control circuit.
Background technology
Mostly the controller of elevator brake is to adopt the mode of silicon control phase-shift voltage regulating field voltage to be provided and to keep voltage at present.Although the mode of operation of this silicon control phase-shift voltage regulating can make the functional reliability of elevator brake increase, but, adopt the mode of operation of silicon control phase-shift voltage regulating, can produce very strong high order harmonic composition in control circuit, both electrical network was polluted, make again elevator brake produce at work larger electromagnetic noise, and the resonance of the rigidity structure that this electromagnetic noise can be by elevator and elevator hoistways amplify and import among elevator cage.In addition, mostly the frequency conversion voltage adjusting of control circuit is with the Rectified alternating current of power frequency 100Hz as carrier wave, because carrier frequency is too low, makes noise frequency after frequency conversion directly fall into the responsive section of human auditory system.
Summary of the invention
Purpose of the present invention just is to provide a kind of elevator-brake mute-operation control circuit, to solve the large problem of elevator brake electromagnetic noise, realizes the quiet operation of elevator brake.
The present invention is achieved in that a kind of elevator-brake mute-operation control circuit, includes:
DC regulated power supply is joined with time delay circuit and modulation switching circuit respectively, and being used for provides above-mentioned control circuit required direct supply;
Time delay circuit joins with described DC regulated power supply, field voltage pulse-width modulation circuit and modulation switching circuit respectively, is used for connecting the working power of field voltage pulse-width modulation circuit within the time period of time-delay;
The field voltage pulse-width modulation circuit joins with described time delay circuit and DC chopper respectively, for generation of and export the pulse-width modulation control signal of field voltage;
Keep the voltage pulse-width modulation circuit, join with modulation switching circuit and DC chopper respectively, for generation of also exporting the pulse-width modulation control signal of keeping voltage;
Modulation switching circuit, join with described DC regulated power supply, described time delay circuit and the described voltage pulse-width modulation circuit of keeping respectively, keep the working power of voltage pulse-width modulation circuit for the moment connection of the working power of turn-offing the field voltage pulse-width modulation circuit at time delay circuit;
Current rectifying and wave filtering circuit joins with the first output node A, and being used for provides external magnetic apparatus coil required direct current working volts;
DC chopper, respectively with described field voltage pulse-width modulation circuit, describedly keep the voltage pulse-width modulation circuit and the second output node B joins, be used for the direct current working volts that are applied on external magnetic apparatus coil are carried out DC chopped-wave; And
The afterflow passage that is used to external magnetic apparatus coil to provide energy to release is provided between the first output node A and the second output node B freewheeling circuit.
In control circuit of the present invention, alternating current input power supplying one tunnel is transformed into the direct current working volts of the required 300V of magnetic apparatus coil left and right through current rectifying and wave filtering circuit, be loaded into the first output node A, and be loaded on the second output node by DC chopper, be connected between the first output node A and the second output node B as the magnetic apparatus coil of load.
Another road of alternating current input power supplying is transformed into the direct supply of the required 12V of control circuit left and right through DC regulated power supply, be loaded on time delay circuit and modulation switching circuit.Time delay circuit provides the ON time of 0.5-1 second (time is adjustable), makes the 12V direct supply be loaded into the field voltage pulse-width modulation circuit by time delay circuit; The field voltage pulse-width modulation circuit gets electric work, the larger excitation pulse control signal of output 15KHz left and right dutycycle, this control signal is added in the control end of DC chopper, make DC chopper carry out DC chopped-wave according to this frequency to the direct current working volts that are applied on the magnetic apparatus coil, thereby obtain the high potential field voltage of about 160-190V and the exciting current of 3-4A.This field voltage and exciting current act on the magnetic apparatus coil, make the magnetic apparatus adhesive, back down the brake control lever on elevator brake, complete the operation of declutching of elevator brake.
After the time-delay of time delay circuit finishes, at once turn-off the working power that is loaded on the field voltage pulse-width modulation circuit, simultaneously, modulation switching circuit moment switches to the direct supply of 12V and keeps the voltage pulse-width modulation circuit; Keep the voltage pulse-width modulation circuit and get electric work, output 20KHz left and right duty is smaller keeps pulse control signal, this control signal is added in the control end of DC chopper, make DC chopper carry out DC chopped-wave according to this frequency to the direct current working volts that are applied on the magnetic apparatus coil, thereby the active potential that obtains about 65V is kept the electric current of keeping of voltage and 1-1.5A.This is kept voltage and keeps galvanic action in the magnetic apparatus coil, makes magnetic apparatus be in the low pressure hold mode, thereby to reach the purpose of saves energy.
When alternating current input power supplying turn-offed, the output loop of this control circuit cut off the power supply immediately, the magnetic apparatus coil losing electricity, and magnetic apparatus is released, and makes elevator brake realize the brake application action.Remanent magnetism energy in the magnetic apparatus coil can be discharged by freewheeling circuit at this moment.
Control circuit of the present invention also includes:
The field voltage track and hold circuit joins with described current rectifying and wave filtering circuit and described field voltage pulse-width modulation circuit respectively, is used for when fluctuation occurs power line voltage, makes field voltage keep stable; And
Keep the voltage-tracing lock-out circuit, join with described current rectifying and wave filtering circuit and the described voltage pulse-width modulation circuit of keeping respectively, be used for when fluctuation occurs power line voltage, make and keep voltage and keep stable.
Field voltage track and hold circuit and to keep the voltage-tracing lock-out circuit be two reactive circuits for the alternating current input power supplying change of voltage.The feedback signal correspondence of mains voltage variations is added to the field voltage pulse-width modulation circuit and keeps on the voltage pulse-width modulation circuit, make the field voltage pulse-width modulation circuit or keep the dutycycle of the pulse-width modulation control signal of voltage pulse-width modulation circuit output, diminish when voltage raises, become large when lower voltage, so just can be when voltage ripple of power network, the voltage that is applied on the magnetic apparatus coil by this control circuit remains unchanged.
Described field voltage track and hold circuit in control circuit of the present invention and the described voltage-tracing lock-out circuit of keeping are voltage feedback circuit or current feedback circuit.
The present invention carries out the adjustment of DC chopped-wave formula by the mode of pulse duration modulation to the direct current working volts that are applied on the magnetic apparatus coil, the impulse rate of direct current working volts makes more than can bring up to 15KHz, the scope that has exceeded mankind's audible frequency section, eliminated the low frequency electromagnetic noise, realize the quiet operation of elevator brake, satisfied the use needs of the drg of traction machine without machine room; Simultaneously, replace the silicon control phase-shift voltage regulating mode of routine with the mode of pulse duration modulation, also eliminated the various potential safety hazards of using the thyristor regulating volt circuit to exist.The voltage-tracing lock-out circuit is set, make the field voltage on the magnetic apparatus coil and keep voltage at line voltage when changing between 160-260V, still can remain unchanged, both can accomplish that low voltage kept the energy saver mode of operation, overcome again when line voltage is low, the harm that the brake hop brake that easily causes causes elevator passenger, thereby efficiently solve the interference of line voltage, the operating voltage range that elevator brake can be adapted to is widened, more stable work, the performance of control circuit is more reliable.
Description of drawings
Fig. 1 is circuit block diagram of the present invention.
Fig. 2 is the schematic circuit diagram of one embodiment of the invention.
The specific embodiment
As shown in Figure 1, control circuit of the present invention comprises time delay circuit 1, field voltage pulse-width modulation circuit 2, modulation switching circuit 3, keeps voltage pulse-width modulation circuit 4, DC regulated power supply 5, current rectifying and wave filtering circuit 6, DC chopper 7, freewheeling circuit 8, field voltage track and hold circuit 10 and keeps the parts such as voltage-tracing lock-out circuit 11, and magnetic apparatus coil 9 is the external load circuit.
Power supply output tap time delay circuit 1 and the modulation switching circuit 3 of DC regulated power supply 5, output tap field voltage pulse-width modulation circuit 2 and the modulation switching circuit 3 of time delay circuit 1, the output of modulation switching circuit 3 connects keeps voltage pulse-width modulation circuit 4; Field voltage pulse-width modulation circuit 2 and the output of keeping voltage pulse-width modulation circuit 4 connect the control end of DC chopper 7 altogether, the second output node B of this control circuit of output termination of DC chopper 7, one tunnel output of current rectifying and wave filtering circuit 6 meets the first output node A of this control circuit, series connection as the magnetic apparatus coil 9 of load, also is connected in parallel to freewheeling circuit 8 between two output node A, B between two output node A, B.The another two-way of current rectifying and wave filtering circuit 6 is exported tap field voltage track and hold circuit 10 and is kept voltage-tracing lock-out circuit 11, the output termination field voltage pulse-width modulation circuit 2 of field voltage track and hold circuit 10 is kept the output termination of voltage-tracing lock-out circuit 11 and is kept voltage pulse-width modulation circuit 4.
Field voltage pulse-width modulation circuit 2 and keep voltage pulse-width modulation circuit 4 and can be consisted of by circuit such as oscillator, sawtooth oscillator or latch; Field voltage track and hold circuit 10 and keep voltage-tracing lock-out circuit 11 and can according to the needs of particular circuit configurations, select voltage feedback circuit or current feedback circuit.
Also can add in this control circuit and remove fast the remanent magnetism circuit, the remanent magnetism with in the magnetic apparatus coil of releasing fast makes the elevator brake snap catch.
Fig. 2 has provided a specific implementation of control circuit of the present invention.
Its mode of operation is: after the antijamming blackout of the source of AC of 220V through voltage transformer T and capacitor C 0 composition, one the tunnel via composition+12V DC regulated power supply 5 such as voltage transformer T1, full-bridge rectifier Q1 and circuit of three-terminal voltage-stabilizing integrated IC1, powers to low-voltage control circuit; After the rectification and filtering of another road via the current rectifying and wave filtering circuit 6 of the high potential of full-bridge rectifier Q2, capacitor C 10 and C11 composition, produce the approximately direct current working volts of 300V, the two ends of the series arm of these direct current working volts through being added in magnetic apparatus coil L and DC chopper 7.DC chopper 7 is by power drive element BG5,6,7(or IGBT device) and peripheral cell connect to form.
DC regulated power supply 5 provides+the 12V direct supply, via potential device W1, capacitor C 6, IC 2(555 chip) and 0.5-1 second adjustable time delay circuit 1 connecting to form such as aerotron BG1, to by IC 3(555 chip), it is the operating voltage of 0.5-1 second that the field voltage pulse-width modulation circuit 2 that potential device W2 and capacitor C 8 etc. connect to form provides duration, make it produce approximately 15KHZ, the excitation pulse control signal that dutycycle is larger, after the 3 pin outputs of this control signal by IC 3, be added in power drive element BG5, 6, 7 grid, make this power drive element as high-power switch tube, follow the control signal action.By current rectifying and wave filtering circuit 6 output+direct current working volts of 300V, after magnetic apparatus coil L, enter ground by power drive element BG5,6,7 the D utmost point and the S utmost point.Like this, just have approximately the high potential field voltage of 160-190V and the exciting current of 3-4A on magnetic apparatus coil L.This field voltage and exciting current make the magnetic apparatus adhesive of elevator brake, back down the brake control lever of drg, complete the action of declutching of elevator brake.
after the time-delay in 0.5-1 second finished, time delay circuit 1 namely turn-offed to the power supply of field voltage pulse-width modulation circuit 2, and it is quit work, and by op amp C4, the modulation switching circuit 3 that aerotron BG3 and BG4 etc. form switches to the chip by IC 5(555 in moment general+12V vdc), what potential device W3 and capacitor C 9 etc. connected to form keeps on voltage pulse-width modulation circuit 4, make voltage pulse-width modulation circuit 4 work of keeping, produce approximately 20KHz, duty is smaller keeps pulse control signal, this control signal is by 3 pin outputs of IC 5, and be added in power drive element BG5, 6, 7 grid, make by current rectifying and wave filtering circuit 6 and export and be added in high potential direct current working volts on magnetic apparatus coil L, by power drive element BG5, 6, 7 enter ground.The duty of the impulse modulation control signal that the control of power drive element is extremely gone up is smaller due to this moment, so, the active potential that will produce an average voltage and be the 65V left and right on magnetic apparatus coil L is kept the electric current of keeping of voltage and 1-1.5A, and this is kept voltage and keep electric current and can guarantee that the drg state of declutching after the magnetic apparatus adhesive remains unchanged.
Field voltage track and hold circuit 10 is to be connected to form by resistance R 17, R18, op amp IC6 and stabilivolt D8 etc.Wherein, resistance R 17, R18 are voltage sample circuit, stabilivolt D8 provide reference voltage, two voltage ratios after, through op amp IC6 output feedback voltage, be added in 5 pin of the IC 3 in field voltage pulse-width modulation circuit 2, so just can make the pulse duty factor of IC3 output, diminish when voltage raises, become large when lower voltage, can when line voltage changes, the field voltage on magnetic apparatus coil L be remained unchanged thus.
In like manner, keeping voltage-tracing lock-out circuit 11 is to be connected to form by resistance R 23, R24, op amp IC7 and stabilivolt D9 etc.It is added in the feedback voltage of op amp IC7 output on 5 pin of IC 5, make the pulse duty factor of IC5 output, diminish when voltage raises, become large when lower voltage, the field voltage on magnetic apparatus coil L can be remained unchanged when line voltage changes.
When source of AC is cut off (the brake application operation of elevator), the IC5 that the voltage impulse modulator control signal is kept in generation quits work, power drive element BG5,6,7 cut-offs, in magnetic apparatus coil L, the remanent magnetism energy of internal memory will be consumed by the freewheeling circuit 8 that diode D10, D11 and resistance R 29, R30 connect to form, and makes elevator brake complete at the appointed time the brake application action.
The parameter of control circuit of the present invention is as follows:
Power line voltage: alternating current 220V;
Field voltage: 170V(is adjustable)+5%, input voltage is 180-260V, the pulse duration modulation frequency of operation is 12-15KHz;
Keep voltage: 65V(is adjustable)+3%, input voltage is 160-260V, the pulse duration modulation frequency of operation is 20-25KHz.
Claims (3)
1. an elevator-brake mute-operation control circuit, is characterized in that, includes:
DC regulated power supply (5) is joined with time delay circuit (1) and modulation switching circuit (3) respectively, and being used for provides above-mentioned control circuit required direct supply;
Time delay circuit (1) joins with described DC regulated power supply (5), field voltage pulse-width modulation circuit (2) and modulation switching circuit (3) respectively, is used for connecting the working power of field voltage pulse-width modulation circuit within the time period of time-delay;
Field voltage pulse-width modulation circuit (2) joins with described time delay circuit (1) and DC chopper (7) respectively, for generation of and export the pulse-width modulation control signal of field voltage;
Keep voltage pulse-width modulation circuit (4), join with modulation switching circuit (3) and DC chopper (7) respectively, for generation of also exporting the pulse-width modulation control signal of keeping voltage;
Modulation switching circuit (3), join with described DC regulated power supply (5), described time delay circuit (1) and the described voltage pulse-width modulation circuit (4) of keeping respectively, keep the working power of voltage pulse-width modulation circuit for the moment connection of the working power of turn-offing the field voltage pulse-width modulation circuit at time delay circuit;
Current rectifying and wave filtering circuit (6), (A) joins with the first output node, and being used for provides external magnetic apparatus coil (9) required direct current working volts;
DC chopper (7), respectively with described field voltage pulse-width modulation circuit (2), describedly keep voltage pulse-width modulation circuit (4) and the second output node (B) joins, be used for the direct current working volts that are applied on external magnetic apparatus coil (9) are carried out DC chopped-wave;
The afterflow passage that is used to external magnetic apparatus coil (9) to provide energy to release is provided between the first output node (A) and the second output node (B) freewheeling circuit (8);
Field voltage track and hold circuit (10) joins with described current rectifying and wave filtering circuit (6) and described field voltage pulse-width modulation circuit (2) respectively, is used for when fluctuation occurs power line voltage, makes field voltage keep stable; And
Keep voltage-tracing lock-out circuit (11), join with described current rectifying and wave filtering circuit (6) and the described voltage pulse-width modulation circuit (4) of keeping respectively, be used for when fluctuation occurs power line voltage, make and keep voltage and keep stable.
2. elevator-brake mute-operation control circuit according to claim 1, it is characterized in that, described field voltage pulse-width modulation circuit (10) is to be connected to form by 555 IC chips (IC3), potential device (W2) and electric capacity (C8), by 3 pin output 15KHz of described 555 IC chips (IC3), the excitation pulse control signal that dutycycle is larger.
3. elevator-brake mute-operation control circuit according to claim 1, it is characterized in that, the described voltage pulse-width modulation circuit (11) of keeping is to be connected to form by 555 IC chips (IC5), potential device (W3) and electric capacity (C9), by 3 pin output 20KHz, the duty of described 555 IC chips (IC5) smaller keep pulse control signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110250609 CN102295242B (en) | 2011-08-29 | 2011-08-29 | Elevator-brake mute-operation control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110250609 CN102295242B (en) | 2011-08-29 | 2011-08-29 | Elevator-brake mute-operation control circuit |
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| CN102295242A CN102295242A (en) | 2011-12-28 |
| CN102295242B true CN102295242B (en) | 2013-06-26 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106160513B (en) * | 2015-04-27 | 2019-03-05 | 蒂森克虏伯电梯（上海）有限公司 | Segmented PWM band-type brake power control circuit and its control method |
| CN107522127A (en) * | 2017-09-14 | 2017-12-29 | 杭州优迈科技有限公司 | A kind of drive circuit of elevator brake |
| CN109268409A (en) * | 2018-11-15 | 2019-01-25 | 石家庄五龙制动器股份有限公司 | Brake flexible braking control method and control circuit |
| CN109592597A (en) * | 2019-01-11 | 2019-04-09 | 李国利 | A kind of crane electromagnetic brake DC chopped-wave control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4986541B2 (en) * | 2006-08-31 | 2012-07-25 | 東芝エレベータ株式会社 | Elevator control device |
| WO2008139567A1 (en) * | 2007-05-08 | 2008-11-20 | Mitsubishi Electric Corporation | Brake control device for elevator |
| ES2418438T3 (en) * | 2008-06-17 | 2013-08-13 | Otis Elevator Company | Safety control of a brake that uses low power control devices |
| CN102070104B (en) * | 2011-01-28 | 2012-11-28 | 石家庄五龙制动器股份有限公司 | Pulse width modulation (PWM) control circuit of elevator brake |
| CN202245908U (en) * | 2011-08-29 | 2012-05-30 | 石家庄五龙制动器股份有限公司 | Control circuit for silent operation of elevator brake |
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Denomination of invention: Elevator-brake mute-operation control circuit Effective date of registration: 20131128 Granted publication date: 20130626 Pledgee: China Everbright Bank Limited by Share Ltd. Shijiazhuang branch Pledgor: SHIJIAZHUANG WULON BRAKE Corp. Registration number: 2013130000003 |
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Date of cancellation: 20150112 Granted publication date: 20130626 Pledgee: China Everbright Bank Limited by Share Ltd. Shijiazhuang branch Pledgor: SHIJIAZHUANG WULON BRAKE Corp. Registration number: 2013130000003 |
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Denomination of invention: Elevator-brake mute-operation control circuit Effective date of registration: 20150403 Granted publication date: 20130626 Pledgee: China Everbright Bank Limited by Share Ltd. Shijiazhuang branch Pledgor: SHIJIAZHUANG WULON BRAKE Corp. Registration number: 2015130000002 |
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Date of cancellation: 20161017 Granted publication date: 20130626 Pledgee: China Everbright Bank Limited by Share Ltd. Shijiazhuang branch Pledgor: SHIJIAZHUANG WULON BRAKE Corp. Registration number: 2015130000002 |
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Denomination of invention: Silent operation control circuit of elevator brake Effective date of registration: 20211103 Granted publication date: 20130626 Pledgee: Bank of Beijing Limited by Share Ltd. Shijiazhuang branch Pledgor: SHIJIAZHUANG WULON BRAKE Corp. Registration number: Y2021990001071 |
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