CN102808874B - Electromagnetic brake control device - Google Patents
Electromagnetic brake control device Download PDFInfo
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- CN102808874B CN102808874B CN201210272316.7A CN201210272316A CN102808874B CN 102808874 B CN102808874 B CN 102808874B CN 201210272316 A CN201210272316 A CN 201210272316A CN 102808874 B CN102808874 B CN 102808874B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
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- 230000002459 sustained effect Effects 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The present invention discloses a kind of electromagnetic brake control device, this control gear is configured to: when starting electromagnetic controller, thyristor to described electromagnetic controller sends the first control signal, makes this thyristor with large angle of flow conducting, thus makes big current flow through the coil of this electromagnetic controller; And after predetermined amount of time, send the second control signal to described thyristor, make this thyristor with Small conduction angle conducting, thus make small area analysis flow through the coil of this electromagnetic controller.By technique scheme, can solve electromagnetic brake well needs big current when starting, and needs small area analysis to maintain after starting.
Description
Technical field
The present invention relates to a kind of electromagnetic brake control device.
Background technique
Break is widely used in Hoisting Machinery, mining machinery, harbour facilities, building machinery and various automation equipment in the industrial production.Electromagnetic brake (exchange, direct current), electrohydraulic brake and disc brake is roughly divided into according to structure and the difference of driving mode.At present, electromagnetic brake both domestic and external is in the epoch of succession of the old by the new.There is shortcomings such as starting and maintain electric current is comparatively large, power factor is low, volume is large, rate of fault is high, high energy consumption, strong noise in old-fashioned Breake Electromagnet; And hydraulic brake leakage of oil is a fatal shortcoming, gently then contaminated equipment and environment, causes the waste of lubricant oil, heavy then easily cause hydraulic equipment oil starvation scuffing of cylinder bore, causes device damage.Along with develop rapidly and the ripe application of electronic device, electromagnetic brake instead of hydraulic brake day by day, and is applied in various equipment.
Electromagnetic brake is a kind of New Brake.The brake signal that it sends mainly through controller, in the form of electric current by electromagnet, changes the braking force of break by changing the electric current passing into electromagnet.It is simple that electromagnetic brake has structure, the advantage such as to control, easy for installation.
In view of the extensive use of current electromagnetic brake, therefore need to operate with electromagnetic brake the control gear adapted.
Summary of the invention
The object of this invention is to provide a kind of can the control gear of ideal control electromagnetic brake operation.
To achieve these goals, the invention provides a kind of electromagnetic brake control device, this control gear is configured to: when starting electromagnetic controller, thyristor to described electromagnetic controller sends the first control signal, make this thyristor with large angle of flow conducting, thus make big current flow through the coil of this electromagnetic controller; And after predetermined amount of time, send the second control signal to described thyristor, make this thyristor with Small conduction angle conducting, thus make small area analysis flow through the coil of this electromagnetic controller.
By technique scheme, can solve electromagnetic brake well needs big current when starting, and needs small area analysis to maintain after starting.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the circuit structure diagram of the electromagnetic brake control device according to an embodiment of the invention; And
Fig. 2 shows the V diagram in positive half period on the first reference diode D6 and the second reference diode D4.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
" common port " mentioned hereinafter can be virtualized end points for convenience of description, or can be Zero potential reference, grounding end etc.
Before introducing concept of the present invention, first simply introduce the working procedure of electromagnetic brake.Before electromagnetic brake is not energized (normally Ac), break is in the state of holding tightly, and braking intermediate plate blocks the motor of such as car puller, makes it not rotate.After break powers on, the electromagnetic coil of break produces magnetic field, soft magnet core in magnetization axis, electromagnetic coil center is moved at the effect decline soft magnet core of electromagnetic force, the iron plate connected together with soft magnet core also has just been drawn, by stationary axle, braking intermediate plate is opened, electromagnetic brake brake off.
This shows, when just starting to power on, larger electric current is needed to move in electromagnetic coil by soft magnet core, when soft magnet core is pulled to after in electromagnetic coil, the magnetic force of electromagnetic coil increases, and therefore at this moment only needs small electric stream just can maintain soft magnet core and is not pulled.Controlling by the size of the electric current of electromagnetic coil is by regulating the thyristor (controllable silicon) in electromagnetic coil loop to realize.
According to design always of the present invention, provide a kind of electromagnetic brake control device, wherein, this control gear is configured to:
When starting electromagnetic controller, the thyristor to described electromagnetic controller sends the first control signal, makes this thyristor with large angle of flow conducting, thus makes big current flow through the coil of this electromagnetic controller; And
After predetermined amount of time, send the second control signal to described thyristor, make this thyristor with Small conduction angle conducting, thus make small area analysis flow through the coil of this electromagnetic controller.
The mode that control gear realizes has a variety of, such as, by the combination of hardware, software or hardware and software.
In an embodiment of the invention, control gear can be following at least one:
Single-chip microcomputer, PLC, dsp controller and FPGA circuit.
That is by programming to above-mentioned device, just above-mentioned operation can be realized.Like this, described first control signal and/or the second control signal can be pulse-width signals.
The programming devices such as employing single-chip microcomputer can realize the control to electromagnetic brake, but the invention allows for alternative solution, namely adopt circuit structure to realize control gear.
As shown in the dotted line frame in Fig. 1, according to an embodiment of the invention, control gear can comprise:
Switching circuit, this switching circuit can comprise the first triode BG1, the second triode BG2 and the first electric capacity C1, the base stage of the first triode BG1 is connected to the collector electrode of the two or three pole BG2, first electric capacity C1 is serially connected between the collector and emitter of the second triode BG2, and the emitter of the first triode BG1 is connected with the control end of described thyristor;
Trigger circuit, these trigger circuit comprise the second electric capacity C2, the 3rd electric capacity C3, the first reference diode D6 and the first resistance R8, the two ends of the second electric capacity C2 are connected with the base stage of described second triode BG2 and one end of the first resistance R8 respectively, the two ends of the 3rd electric capacity C3 are connected with common port with one end of the first resistance R8 respectively, and the first reference diode D6 is connected across the two ends of the 3rd electric capacity C3; And
Delay trigger circuit, this delay trigger circuit can comprise the 4th electric capacity C4, the second reference diode D4, for give the 4th electric capacity C4 charge the first charging circuit and the second charging circuit, the negative electrode of the second reference diode D4 can be connected to the node between the second charging circuit and the 4th electric capacity C4, and the anode of the second reference diode D4 can be connected with the base stage of the second triode BG2.
In a concrete mode of execution of the present invention, this second charging circuit can comprise the second resistance R2, the 5th electric capacity C5 and the first diode D5 that are connected in series successively, the negative electrode of this first diode D5 is connected with one end of the 4th electric capacity C4, the other end of the 4th electric capacity C4 is connected with common port, and the negative electrode of the second reference diode D4 is connected with the anode of the first diode D5 and the base stage of the second triode BG2 respectively with anode.
Second resistance R2 can be connected in series with the first resistance R8.First charging circuit can comprise the 3rd resistance R3, the 4th resistance R10 and the 5th resistance R11,3rd resistance R3 is connected to the 4th electric capacity C4 respectively by the 4th resistance R10 and the 5th resistance R11, and wherein the 4th resistance R10 can also be connected to the 4th electric capacity C4 by described first diode D5.In order to outstanding emphasis of the present invention, well known to a person skilled in the art in Fig. 1 that the assembly that some play basic role is not described in detail, resistance R7 such as between the base stage and emitter of the second triode BG2 and be connected across the reference diode D3 at resistance R7 two ends, be serially connected in the resistance R6 of collector electrode place of the second triode BG2, be serially connected in resistance R5 and R6 of the collector and emitter of the first triode BG1, also have such as resistance R9 etc.Also show in Fig. 1 that resistance R4 is connected to the first triode BG1 between emitter and common port, and common port is connected with the negative electrode (K) of thyristor.
Also show the major loop of electromagnetic brake in Fig. 1, commutation diode D2, sustained diode 1, thyristor V1, electromagnetic coil L etc. can be comprised.Here to should be mentioned that the Ac being supplied to control gear is first by flowing to control gear again after commutation diode D2 rectification, like this, only having the positive half period component of Ac to be supplied to control gear.If not this commutation diode D2 in major loop, then control gear can also comprise commutation diode, such as, be arranged on the circuit between resistance R2 and power supply, for preventing, back current is supplied to described trigger circuit or delay trigger circuit.
How lower surface analysis controls the operating process of electromagnetic brake " start with big current, small area analysis maintains " with the control gear of this circuit form.
Such as, what provide to control gear can be the civil power of 220v, 50Hz, after the rectification of commutation diode D2, only has the Ac of positive half period to be provided to control gear.At each positive half period, electric current flows through C2, flows through resistance R7, the voltage V at resistance R7 two ends
r7the conducting voltage (such as 0.7V) of triode BG2 can be arrived very soon, make triode BG2 conducting, at this moment, when the voltage between the base stage of triode BG1 and emitter is almost the BG2 conducting of 0(triode, voltage between its collector electrode and emitter is very little), triode BG1 ends.Meanwhile, current flowing resistance R8(and resistance R2) charge to electric capacity C3, when the voltage of electric capacity C3 reaches breakdown voltage (such as the bV) of reference diode D6, reference diode is breakdown, and after this electric capacity C3 two ends maintain a constant voltage bV.At this moment, electric capacity C2 current vanishes (characteristic due to " every the straight-through friendship " of electric capacity), the voltage V of resistance R7
r7be 0, triode BG2 ends.At this moment, bV voltage is charged to electric capacity C1 by such as resistance R6, and when the voltage of electric capacity C1 reaches conducting voltage (such as, 0.7V) of triode BG1, triode BG1 conducting, to SCR-output voltage, makes turn on thyristors.
As can be seen from above description, in each positive half period, the ON time of thyristor (namely, the angle of flow) be decide the time needed for breakdown voltage being charged to reference diode D6 by electric capacity C3, that is, in each positive half period of Ac, the large angle of flow of described thyristor and described 3rd electric capacity C3 are charged to the breakdown voltage of described first reference diode D6 duration of charge from 0 voltage is associated.This duration of charge and such as resistance R8(and R2), the breakdown voltage of electric capacity C3 and reference diode is relevant, therefore, as long as the parameter (such as, resistance value, magnitude of voltage etc.) of suitable selection resistance, electric capacity and reference diode, just can determine the ON time of thyristor, i.e. the angle of flow.Owing to needing big current when starting, therefore the angle of flow is set larger, i.e. the large angle of flow.
Predetermined amount of time is realized by delayed trigger circuit.Specifically, the duration of charge that predetermined amount of time and described 4th electric capacity C4 are charged to close to the breakdown voltage of described second reference diode D4 from 0V is associated.
After control gear powers on, at each positive half period, charged to electric capacity C4 by the first charging circuit and the second charging circuit.The charging time constant τ of the first charging circuit
1=(R3+R11//R10) × C4(note: // represent the resistance value after resistance R11 and R10 parallel connection).By the selection of parameter (such as, resistance value, capacitance), make the electric current of the second charging circuit larger than the electric current of the first charging circuit.And during electric capacity C4 electric discharge, because diode D5 blocks back current, discharge circuit only has R3, R11, its discharge time constant τ
2=(R3+R11) × C4.Contrasted can be known by discharge and recharge, be that charging is fast to electric capacity C4, electric discharge is slow, and in each cycle of Ac, the electricity that the electricity filled to described 4th electric capacity C4 is put than the 4th electric capacity C4 is many.So the voltage of electric capacity C4 rose in each cycle.
Be not raised to the breakdown voltage (such as aV) of reference diode D4 at the voltage of electric capacity C4 before, as mentioned above, produce the large angle of flow.Through some all after dates, the voltage of electric capacity C4 has been raised to about aV.At next positive half period, the voltage of electric capacity C4 is raised to aV very soon, remain unchanged, at this moment, reference diode D4 is breakdown, make reference diode D4 voltage stabilizing to aV, electric current in resistance R10 and electric capacity C6 flows through reference diode D4, resistance R7, makes the voltage of resistance R7 reach rapidly the conducting voltage such as 0.7V of triode BG2, triode BG2 conducting, voltage now between the collector electrode of triode BG2 and emitter is very low, and triode BG1 can not conducting.Selected by suitable parameters (such as, resistance, electric capacity, breakdown voltage etc.), make reference diode D4 (being also like this in follow-up positive half period) in this positive half period more first than reference diode D6 breakdown, and puncture and first to end than reference diode D6 afterwards.After reference diode D4 ends, the voltage of resistance R7 becomes 0, triode BG2 ends, now because reference diode D6 is breakdown, the voltage of electric capacity C1 reaches rapidly the conducting voltage (such as 0.7V) of triode BG1, triode BG1 conducting, output voltage to the control end of thyristor, turn on thyristors.
Fig. 2 shows the V diagram in positive half period on the first reference diode D6 and the second reference diode D4.In Fig. 2, dotted line 1 represents voltage waveform when supposing reference diode D4 not voltage stabilizing, voltage waveform when dotted line 2 is hypothesis reference diode D6 not voltage stabilizing.In the t0-t1 period, the electric current in electric capacity C2 flows through triode BG2.In the t1 moment, no current in electric capacity C2, and the electric current in reference diode D4 maintains triode BG2 conducting.Reference diode D4 is more first than reference diode D6 breakdown, after reference diode D4 first end than reference diode D6, first from voltage stabilizing state-transition to cut-off state.In the t2 moment, reference diode D4 voltage surely can not arrive aV, and cut-off, current vanishes, triode BG2 ends.At this moment, reference diode D6 keeps voltage stabilizing, is charged to electric capacity C1 by resistance R6, when electric capacity C1 voltage equals the conducting voltage of triode BG1 (such as 0.7V), and triode BG1 conducting.The emitter current of triode BG1 is that thyristor control pole (G) provides enough big current to make IGBT group conducting.ON time is a bit larger tham t2 place (owing to needing a time to electric capacity C1 charging) at each positive half period.At negative half-cycle, thyristor bears back-pressure cut-off.
Exemplarily describe with triode although above-mentioned, it will be understood by those skilled in the art that the substitute mode that can have other, such as field effect transistor etc.In addition, in order to ensure drawing in coil by electromagnetic core, want long enough with the time of large angle of flow conducting, but can not be oversize, because the time is oversize, in electromagnetic coil, very big current can be had always, some devices that rated current is little can be damaged.Experimentally and experience, ON time can be 8-12 the cycle of civil power, and one-period is 20ms, namely 160-240ms.Therefore, the scope of above-mentioned predetermined amount of time can be 160-240ms.
Mode provided by the invention can solve electromagnetic brake well needs big current when starting, and need small area analysis to maintain after starting, and can electric current be reduced, reduce the magnetic field energy stored, can brake by Quick release after power-off, saving power and the temperature rise of reduction field coil, can reduce cost of production simultaneously.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Claims (6)
1. an electromagnetic brake control device, is characterized in that, this control gear is configured to:
When starting electromagnetic controller, the thyristor to described electromagnetic controller sends the first control signal, makes this thyristor with large angle of flow conducting, thus makes big current flow through the coil of this electromagnetic controller; And
After predetermined amount of time, send the second control signal to described thyristor, make this thyristor with Small conduction angle conducting, thus make small area analysis flow through the coil of this electromagnetic controller;
Wherein this control gear comprises:
Switching circuit, this switching circuit comprises the first triode (BG1), the second triode (BG2) and the first electric capacity (C1), the base stage of the first triode (BG1) is connected to the collector electrode of the second triode (BG2), first electric capacity (C1) is serially connected between the collector and emitter of the second triode (BG2), and the emitter of the first triode (BG1) is connected with the control end of described thyristor;
Trigger circuit, these trigger circuit comprise the second electric capacity (C2), the 3rd electric capacity (C3), the first reference diode (D6) and the first resistance (R8), the two ends of the second electric capacity (C2) are connected with the base stage of described second triode (BG2) and one end of the first resistance (R8) respectively, the two ends of the 3rd electric capacity (C3) are connected with common port with one end of the first resistance (R8) respectively, and the first reference diode (D6) is connected across the two ends of the 3rd electric capacity (C3); And
Delay trigger circuit, this delay trigger circuit comprise the 4th electric capacity (C4), the second reference diode (D4), for the first charging circuit of charging of the 4th electric capacity (C4) and the second charging circuit, the negative electrode of the second reference diode (D4) is connected to the node between the second charging circuit and the 4th electric capacity (C4), and the anode of the second reference diode (D4) is connected with the base stage of the second triode (BG2);
Wherein, the duration of charge that described predetermined amount of time and described 4th electric capacity (C4) are charged to close to the breakdown voltage of described second reference diode (D4) from 0V is associated.
2. control gear according to claim 1, wherein, provides Ac to this control gear, and in each cycle of this Ac, the electricity filled to described 4th electric capacity (C4) wants many than the electricity that the 4th electric capacity (C4) is put.
3. control gear according to claim 2, wherein, in each positive half period of described Ac, the large angle of flow of described thyristor and described 3rd electric capacity (C3) are charged to the breakdown voltage of described first reference diode (D6) duration of charge from 0V voltage is associated.
4. control gear according to claim 2, wherein, in each positive half period of described Ac, described second reference diode (D4) is more first than described first reference diode (D6) from voltage stabilizing state-transition to cut-off state.
5. control gear according to claim 2, wherein,
Described second charging circuit comprises second resistance (R2) of serial connection, the 5th electric capacity (C5) and the first diode (D5), the negative electrode of this first diode (D5) is connected with one end of the 4th electric capacity (C4), the other end of the 4th electric capacity (C4) is connected with common port, and the negative electrode of the second reference diode (D4) is connected with the anode of the first diode (D5) and the base stage of the second triode (BG2) respectively with anode;
Described first charging circuit comprises the 3rd resistance (R3), the 4th resistance (R10) and the 5th resistance (R11), 3rd resistance (R3) is connected to the 4th electric capacity (C4) respectively by the 4th resistance (R10) and the 5th resistance (R11), and wherein the 4th resistance (R10) is also connected to the 4th electric capacity (C4) by described first diode (D5);
The electric current of described second charging circuit is greater than the electric current of described first charging circuit.
6. control gear according to claim 1 and 2, wherein, this control gear also comprises the second diode (D2), for preventing, back current is supplied to described trigger circuit or delay trigger circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210272316.7A CN102808874B (en) | 2012-08-01 | 2012-08-01 | Electromagnetic brake control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210272316.7A CN102808874B (en) | 2012-08-01 | 2012-08-01 | Electromagnetic brake control device |
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| CN102808874A CN102808874A (en) | 2012-12-05 |
| CN102808874B true CN102808874B (en) | 2015-08-12 |
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| CN201210272316.7A Active CN102808874B (en) | 2012-08-01 | 2012-08-01 | Electromagnetic brake control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4053427A4 (en) * | 2020-03-06 | 2024-01-03 | Altra Ind Motion Shenzhen Co Ltd | Electromagnetic brake control apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3412391B1 (en) * | 2017-06-09 | 2021-11-17 | Andreas Stihl AG & Co. KG | Work device with electromagnetic brake |
| CN114576415A (en) * | 2022-03-09 | 2022-06-03 | 上海松下微波炉有限公司 | Control circuit and electromagnetic device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2409708Y (en) * | 1999-11-22 | 2000-12-06 | 袁金根 | Automatic converting double-voltage power |
| CN101188158A (en) * | 2006-11-15 | 2008-05-28 | 上海宝钢设备检修有限公司 | A power module for DC electromagnetic arrester |
| CN102226957A (en) * | 2011-03-22 | 2011-10-26 | 天津大学 | Circuit for realizing power-on voltage-multiplying accelerated suction and low power consumption maintenance of electromagnetic brake |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001349358A (en) * | 2000-06-02 | 2001-12-21 | Oriental Motor Co Ltd | Rectifying circuit for electromagnetic brake |
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2012
- 2012-08-01 CN CN201210272316.7A patent/CN102808874B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2409708Y (en) * | 1999-11-22 | 2000-12-06 | 袁金根 | Automatic converting double-voltage power |
| CN101188158A (en) * | 2006-11-15 | 2008-05-28 | 上海宝钢设备检修有限公司 | A power module for DC electromagnetic arrester |
| CN102226957A (en) * | 2011-03-22 | 2011-10-26 | 天津大学 | Circuit for realizing power-on voltage-multiplying accelerated suction and low power consumption maintenance of electromagnetic brake |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4053427A4 (en) * | 2020-03-06 | 2024-01-03 | Altra Ind Motion Shenzhen Co Ltd | Electromagnetic brake control apparatus |
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