CN201226285Y - Friction dry-type electromagnetic disc type brake rectifier - Google Patents
Friction dry-type electromagnetic disc type brake rectifier Download PDFInfo
- Publication number
- CN201226285Y CN201226285Y CNU2008200676137U CN200820067613U CN201226285Y CN 201226285 Y CN201226285 Y CN 201226285Y CN U2008200676137 U CNU2008200676137 U CN U2008200676137U CN 200820067613 U CN200820067613 U CN 200820067613U CN 201226285 Y CN201226285 Y CN 201226285Y
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- CN
- China
- Prior art keywords
- alternating current
- circuit
- brake
- full
- rectifying circuit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides a rectifier of an electromagnetic disk type friction dry brake, which comprises alternating current input ends, a rectifying circuit, control contacts and a discharge circuit; wherein, the rectifying circuit adopts a full-wave rectifying circuit; the alternating current input ends are connected with a time relay (KT), a solid-state resistor (R1) and an alternating current contactor (K) in parallel; the normally opened contact (KT1) of the time relay (KT) is connected with the power supply loop of the alternating current contactor (K) in series; and the normally closed contact (K1) of the alternating current contactor (K) is connected with one rectifying branch of the full-wave rectifying circuit in series. The full-wave rectifying circuit also can conduct half-wave rectification. The switch between full-wave rectification and half-wave rectification is carried out by the time relay and the alternating current contactor. The circuit which is closed at a high voltage and operates at a rated voltage can utilize a transient high voltage to multiply closing current, thus shortening the closing time and attracting time of the armature disk of the electromagnetic disk type friction dry brake.
Description
Technical field
The utility model relates to a kind of friction dry type electromagnetic disc type brake rectifier, belongs to friction dry type electromagnetic disc type brake rectifier control circuit.
Background technology
Existing multiple friction dry type electromagnetic disc type brake rectifier on the market.Most of control circuit belongs to quick joint and disconnects half-wave rectifying circuit fast.It is made of elements such as rectifier diode, solid-state resistance, solid capacitors.The control circuit operation principle: output DC 170V or 99V (DC) encourage brake coil.During closing of circuit: alternating current 380V or 220V input are passed through resistance again through half-wave rectifying circuit, electric capacity charging this moment, external contactor normally opened contact closure.Make the brake quick pick-up.During disconnection, external contactor normally opened contact disconnects, and the brake dump energy is through discharging, and meanwhile electric capacity carries out back discharge to brake coil, imports deexcitation magnetoelectricity stream and quickens to eliminate the brake dump energy, and brake is disconnected fast.Discharge often regular meeting and make external contacts of contactor produce the arcing phenomenon, brake is broken down.
Engage the defective that exists with quick disconnection half-wave rectifying circuit fast:
1, armature pickup time: because electromagnetic disc type brake is a kind of inductance element.When electric current takes place sharply to change, because the induction reactance effect produces a kind of self-induced e.m.f, the variation that it will stop electric current to take place in circuit.So behind the electromagnetic brake coil electricity, by adhesive will be arranged one period transit time to armature; In like manner, to armature release also to there be one period transit time, be referred to as the pickup time and release (braking) time of electromagnetic disc type brake this transit time respectively at cut-out voltage.According to relevant electromagnetic disc type brake circuit theory as can be known:
When the moment of brake coil energized, current in loop is initially zero, and under the effect of voltage, electric current rises exponentially.
When the brake coil power supply disconnects, loss of voltage, current in loop but can not arrive zero immediately, but reduces exponentially.
So must be quick-response excitation circuit and the synthesis of eliminating the remanent magnetism circuit in brake control circuit.But its exciting current input relatively is changeless, and this has just illustrated that also input one is regularly exported fixed thereupon characteristic in half-wave circuit.It only satisfies the part characteristic of brake in attracting process.
2. according to friction dry type electromagnetic disc type brake operating characteristics as can be known: increase electromagnetic attraction, the armature pull up time is reduced, and electromagnetic attraction is caused by electric current, so the electric current increase, the armature pull up time just reduces.If electric current remains unchanged, at this moment pull up time only is directly proportional with the square root in gap.So air gap increases, the armature pull up time has just increased.Actual conditions also are so, and along with motor torque and braking moment increase, the brake structural size enlarges thereupon, and the operate as normal air gap between armature and the friction plate is essential to be increased, and could guarantee the brake operate as normal.Yet constant at electric current, under the operate as normal air gap increase condition, the armature pull up time increases, the starting of driving mechanism such as motor and stop with brake asynchronous.Brake all is to carry out in half Frotteurism when each action, has greatly accelerated the abrasion of friction plate, reduces the useful life of brake.Obviously, above-mentioned half-wave circuit can not adapt to the situation that the operate as normal air gap increases.
Summary of the invention
The purpose of this utility model is in order to solve the above-mentioned background technical deficiency, propose a kind of can instantaneous increase electric current, comprehensive friction dry type electromagnetic disc type brake rectifier that again can the instantaneous relase electric weight.
The technical solution of the utility model: friction dry type electromagnetic disc type brake rectifier of the present utility model comprises alternating current input, rectification circuit, control contact, discharge loop, it is characterized in that: rectification circuit adopts full-wave rectifying circuit, in alternating current input time relay KT in parallel, solid-state resistance R
1, A.C. contactor K, the normally opened contact KT1 of time relay KT is connected on the current supply circuit of A.C. contactor K, the normally-closed contact K1 of A.C. contactor K is connected on a rectification branch road of full-wave rectifying circuit.
Advantage of the present utility model: 1. rectification circuit is taken into account halfwave rectifier work by full-wave rectifying circuit.Operation principle is: high pressure adhesive, low pressure operation.Switching between them is changed by the time relay and electromagnetic relay, this high pressure adhesive, and the circuit of rated voltage operation strengthens the attract current of multiple by instantaneous pressure, has shortened the pickup time and the pull up time of electromagnetic disc type brake armature disc.Accelerated the moment adhesive of brake, realized that the brake working clearance increases, the requirement that the brake attract current changes thereupon along with braking moment increases; Reach brake and be subjected to working clearance increase or minimizing pickup time hardly and affected purpose.Thereby guaranteeing that motor torque and braking moment increase, the braking of brake and disconnect with the starting of driving mechanism such as motor and stop to reach unanimity.And the wearing and tearing when having reduced the friction plate starting indirectly, prolong friction plate useful life.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Fig. 1 is circuit theory diagrams of the present utility model: friction dry type electromagnetic disc type brake rectifier of the present utility model comprises 2 input AC electricity 380V of alternating current input A, B or 220V (AC); In alternating current input time relay KT in parallel, solid-state resistance R
1, A.C. contactor K with by rectifier diode ZP
1, ZP
2, ZP
3, ZP
4Forming full-wave rectifying circuit connects; The normally opened contact KT1 of time relay KT is connected on the current supply circuit of A.C. contactor K, and the normally-closed contact K1 of A.C. contactor K is connected on a rectification branch road of full-wave rectifying circuit, R
2It is the output resistance of rectification circuit; R
3Form the load discharge arc-suppression circuit with capacitor C; WK is external normally opened contact.L is a brake coil.The negative pole a of L, anodal b.
Operation principle and process:
One, during closing of circuit:
2 input AC electricity 380V of A, B or 220V (AC), electric current is through time relay KT, solid-state resistance R
1, pass through rectifier diode ZP again
1, ZP
2, ZP
3, ZP
4Form full-wave rectifying circuit, solid-state resistance R
2, R
3, capacitor C, WK (capacitor C charging this moment, external normally opened contact WK closure), from negative pole a, anodal b two ends output DC 342V or 198V (DC), excitation brake coil L.Full-wave rectifying circuit work.This moment, brake coil operating voltage design load was 170V (DC) or 99V (DC), and actual starting resistor value is 342 (DC) or 198 (DC), increases by 2 times than design load, and under the constant situation of other condition of work, the respective electrical flow valuve also can increase by 2 times.Brake is quick pick-up more.Solid-state resistance R
2, R
3Can protect rectifier diode to exempt from the puncture of the inverse electromotive force (reverse voltage) that is produced when brake coil starts and stops; can increase brake coil increase of resistance value in the loop when starting and stopping again; reduce brake adhesive and opening time thereby reach, make the brake adhesive and stop rapider.
Two, halfwave rectifier operating state:
Behind closed some seconds of the full-wave rectifying circuit, the normally opened contact KT1 closure of time relay KT, electromagnetic relay K gets electric, meanwhile electromagnetic relay K normally opened contact K
1Disconnect rectifier diode ZP
3Do not work, from 2 input AC electricity of A, B through normally opened contact KT1, the electromagnetic relay K of time relay KT, solid-state resistance R
1, rectifier diode ZP
1, ZP
3Form half-wave rectifying circuit, pass through solid-state resistance R again
2, R
3, capacitor C, WK be 170V or 99V (DC) from negative pole a, anodal b two ends output DC, gives brake coil L power supply.The respective electrical flow valuve is also dwindled identical multiple.From electrotechnics, real work voltage only is the voltage of keeping of design work voltage, because of brake is an inductance element, is in for a long time to keep in the voltage power supply state, and its caloric value reduces greatly.
Three, capacitor discharge arc-suppression circuit:
The rectifier dead electricity, external normally opened contact WK disconnects, and brake coil L dump energy discharges through external normally opened contact WK, and meanwhile capacitor C is carried out back discharge to brake coil, import deexcitation magnetoelectricity stream and quicken to eliminate the brake dump energy, brake is disconnected fast.And have the arc extinguishing effect concurrently.
Claims (1)
1. friction dry type electromagnetic disc type brake rectifier, comprise alternating current input, rectification circuit, control contact, discharge loop, it is characterized in that: rectification circuit adopts full-wave rectifying circuit, in alternating current input time relay KT in parallel, solid-state resistance R
1, A.C. contactor K, the normally opened contact KT1 of time relay KT is connected on the current supply circuit of A.C. contactor K, the normally-closed contact K1 of A.C. contactor K is connected on a rectification branch road of full-wave rectifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200676137U CN201226285Y (en) | 2008-06-05 | 2008-06-05 | Friction dry-type electromagnetic disc type brake rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200676137U CN201226285Y (en) | 2008-06-05 | 2008-06-05 | Friction dry-type electromagnetic disc type brake rectifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201226285Y true CN201226285Y (en) | 2009-04-22 |
Family
ID=40599182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200676137U Expired - Lifetime CN201226285Y (en) | 2008-06-05 | 2008-06-05 | Friction dry-type electromagnetic disc type brake rectifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201226285Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138609A (en) * | 2011-11-25 | 2013-06-05 | Ge能源电力转换有限公司 | Multiple point rectifier with brake chopper |
| CN105257106A (en) * | 2015-07-29 | 2016-01-20 | 珠海格力电器股份有限公司 | Control circuit, method and device for electromagnetic lock and disinfection cabinet |
-
2008
- 2008-06-05 CN CNU2008200676137U patent/CN201226285Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138609A (en) * | 2011-11-25 | 2013-06-05 | Ge能源电力转换有限公司 | Multiple point rectifier with brake chopper |
| CN103138609B (en) * | 2011-11-25 | 2017-03-01 | Ge能源电力转换有限公司 | Many point converters with brake chopper |
| CN105257106A (en) * | 2015-07-29 | 2016-01-20 | 珠海格力电器股份有限公司 | Control circuit, method and device for electromagnetic lock and disinfection cabinet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090422 |