CN204794786U - Excitation control circuit of electromagnetic braking ware - Google Patents
Excitation control circuit of electromagnetic braking ware Download PDFInfo
- Publication number
- CN204794786U CN204794786U CN201520465809.1U CN201520465809U CN204794786U CN 204794786 U CN204794786 U CN 204794786U CN 201520465809 U CN201520465809 U CN 201520465809U CN 204794786 U CN204794786 U CN 204794786U
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- Prior art keywords
- diode
- inductive load
- control circuit
- rectifier bridge
- excitation control
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- Expired - Fee Related
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Abstract
The utility model discloses an excitation control circuit of electromagnetic braking ware, including the inductive load (L1) of electromagnetic braking ware, rectifier bridge (B1) is passed through at inductive load (L1) both ends and power input end (AC+, AC+) links to each other, the parallelly connected afterflow branch road that has is gone up to inductive load (L1), the afterflow branch road including resistance (R1), current regulator diode (CRD) and the second diode (D2) of establishing ties together, the positive pole of second diode (D2) is connected to rectifier bridge (B1's) cathode output, and the positive negative pole orientation of current regulator diode is the same with the second diode. The utility model discloses a back -emf problem of electromagnetic braking ware can effectively be solved to the structure, can stablize the size of back -emf in addition when avoiding long -time afterflow.
Description
Technical field
The utility model relates to a kind of electromagnetic brake, particularly a kind of excitation control circuit of electromagnetic brake.
Background technology
Exciter is the Important Components controlling electromagnetic brake opening and closing, in the prior art, generally all do not have freewheeling circuit in divider chain, if when load is larger inductive load, the induction back electromotive force produced can smash less device withstand voltage in circuit thus damage circuit.And existing freewheeling circuit, be generally only use diodes in parallel at power output end as freewheeling circuit, this afterflow mode is when inductive load, and back-emf is very little, but the duration is oversize; Another kind of comparatively general way is connected in parallel on power output end with after diode series resistance, when adopting this afterflow mode, if the too large back-emf of resistance, can be too high, and the resistance too small then duration can be long.
Utility model content
The purpose of this utility model is, provides a kind of excitation control circuit of electromagnetic brake.Its structure effectively can solve the back-emf problem of electromagnetic brake, and can avoid the size of Simultaneous Stabilization back-emf of long-time afterflow.
The technical solution of the utility model: the excitation control circuit of electromagnetic brake, is characterized in: the inductive load comprising electromagnetic brake, and inductive load two ends are connected with power input by rectifier bridge; Described inductive load is parallel with afterflow branch road; Described afterflow branch road comprises the resistance, current regulator diode and the second diode that are cascaded; The positive pole of described second diode is connected to the cathode output end of rectifier bridge, and the cathode and anode directions of current regulator diode is identical with the second diode.
In the excitation control circuit of above-mentioned electromagnetic brake, described rectifier bridge and power input be wherein in series with the first diode between one end, the first diode is parallel with fling-cut switch.When fling-cut switch closes, rectifier bridge carries out normal rectification to AC power.And when fling-cut switch is opened, the first diode can be made to seal in circuit and carry out halfwave rectifier, the power output of rectifier bridge can be reduced, the utility model therefore can be made to go for more high-tension AC power; Meanwhile, also can change power supply into DC power supply, now the first diode can, as the protection component of oppositely cut-off, prevent the resistance in afterflow branch road from burning out.Thus expand power supply applicability of the present utility model.
Compared with prior art, the utility model by having connected resistance, current regulator diode and the second diode on afterflow branch road, the afterflow that not only can produce after a loss of power inductive load, and due to the constant current output effect of current regulator diode, back-emf can be controlled maintain in a controlled range, and time of afterflow under constant current effect, also can not be made to remain oversize.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
Being labeled as in accompanying drawing: AC/+, AC/--power input, L1-inductive load, B1-rectifier bridge, R1-resistance, D1-first diode, D2-second diode, CRD-current regulator diode.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described, but not as the foundation limited the utility model.
Embodiment.The excitation control circuit of electromagnetic brake, as shown in Figure 1: the inductive load L1 comprising electromagnetic brake, inductive load L1 two ends are connected with power input AC/+, AC/-by rectifier bridge B1; Described inductive load L1 is parallel with afterflow branch road; Described afterflow branch road comprises resistance R1, the current regulator diode CRD and the second diode D2 that are cascaded; The positive pole of described second diode D2 is connected to the cathode output end of rectifier bridge B1, and the cathode and anode directions of current regulator diode is identical with the second diode.Described rectifier bridge B1 and power input AC/+, AC/-are wherein in series with the first diode D1 between one end, the first diode D1 is parallel with fling-cut switch K1.
When fling-cut switch is opened, if when client's power input voltage is DC110V, this diode, as wire effect, can, as the protection component of oppositely cut-off, prevent the resistance in continuous current circuit from burning out in addition; When client's input voltage is AC220V, diode D1 is as one of the element of halfwave rectifier.It is general that this diode can make excitation controller reach input voltage DC110V and AC220V.
Claims (2)
1. the excitation control circuit of electromagnetic brake, is characterized in that: the inductive load (L1) comprising electromagnetic brake, and inductive load (L1) two ends are connected with power input (AC/+, AC/-) by rectifier bridge (B1); Described inductive load (L1) is parallel with afterflow branch road; Described afterflow branch road comprises the resistance (R1), current regulator diode (CRD) and the second diode (D2) that are cascaded; The positive pole of described second diode (D2) is connected to the cathode output end of rectifier bridge (B1), and the cathode and anode directions of current regulator diode is identical with the second diode.
2. the excitation control circuit of electromagnetic brake according to claim 1, it is characterized in that: described rectifier bridge (B1) and power input (AC/+, AC/-) be wherein in series with the first diode (D1) between one end, the first diode (D1) is parallel with fling-cut switch (K1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520465809.1U CN204794786U (en) | 2015-06-30 | 2015-06-30 | Excitation control circuit of electromagnetic braking ware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520465809.1U CN204794786U (en) | 2015-06-30 | 2015-06-30 | Excitation control circuit of electromagnetic braking ware |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204794786U true CN204794786U (en) | 2015-11-18 |
Family
ID=54534757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520465809.1U Expired - Fee Related CN204794786U (en) | 2015-06-30 | 2015-06-30 | Excitation control circuit of electromagnetic braking ware |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204794786U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935230A (en) * | 2015-06-30 | 2015-09-23 | 浙江玛拓驱动设备有限公司 | Incentive control circuit of electromagnetic brake |
| CN106452121A (en) * | 2016-10-31 | 2017-02-22 | 北京航天斯达科技有限公司 | Adjustable excitation power supply of electric vibration table |
-
2015
- 2015-06-30 CN CN201520465809.1U patent/CN204794786U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935230A (en) * | 2015-06-30 | 2015-09-23 | 浙江玛拓驱动设备有限公司 | Incentive control circuit of electromagnetic brake |
| CN106452121A (en) * | 2016-10-31 | 2017-02-22 | 北京航天斯达科技有限公司 | Adjustable excitation power supply of electric vibration table |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20200630 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |