CN204145361U - The lodging mechanism control circuit of interlocking and overcurrent protection - Google Patents
The lodging mechanism control circuit of interlocking and overcurrent protection Download PDFInfo
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- CN204145361U CN204145361U CN201420618905.0U CN201420618905U CN204145361U CN 204145361 U CN204145361 U CN 204145361U CN 201420618905 U CN201420618905 U CN 201420618905U CN 204145361 U CN204145361 U CN 204145361U
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Abstract
The utility model provides the lodging mechanism control circuit of a kind of interlocking with overcurrent protection, and it considers the problem preventing short circuit on traditional control circuit, increases by a road Control driving power; But also set up self-recoverage switch, when electric motor short circuit fault produces big current, burn circuit for preventing; Set up piezo-resistance, for when relay adhesive produces surge with disconnection, prevent motor two ends from producing too high voltages and damaging motor.The utility model can not only good protective circuit, also has that cost is low, simplicity of design, practicality advantages of higher.
Description
Technical field
The utility model relates to a kind of control circuit, especially relates to the lodging mechanism control circuit of a kind of interlocking and overcurrent protection.
Background technology
Lodging mechanism control circuit common in prior art adopts forward and the reverse voltage of two Control motors, thus realizes the forward of motor and rotate backward.And the adhesive of relay and disconnection are by Single-chip Controlling, before controlling one of them relay adhesive, single-chip microcomputer can first disconnect another relay, thus prevents electric motor short circuit.But, can steady operation when single-chip microcomputer normally works, once single-chip microcomputer or electrical fault, very likely cause short circuit thus burn circuit.Such as, as shown in Figure 1, control circuit adopts two Control electric moter voltage directions to certain traditional control circuit.During the inner adhesive of relay, 8 pin are connected with 7 pin, and 4 pin are connected with 5 pin, 6 pin and 3 pin unsettled.Relay inside disconnect time, 7 pin are connected with 6 pin, and 4 pin are connected with 3 pin, 8 pin and 5 pin unsettled.Disconnect U2 before Single-chip Controlling U1 adhesive, now motor two ends are unsettled, do not have driving voltage.Then adhesive U1, now motor A holds ground connection, and B termination enters driving voltage, thus starts to rotate forward.Rotate backward with the process of rotating forward basically identical, this design, once single-chip microcomputer or relay fault, driving power short circuit will be caused to threaten the safety of power supply and whole control system.
Utility model content
The purpose of this utility model is: provide a kind of interlocking and the lodging mechanism control circuit of overcurrent protection, solve traditional lodging mechanism control circuit once its single-chip microcomputer or electrical fault, very likely causes short circuit thus burns the problem of circuit.
The purpose of this utility model is achieved through the following technical solutions:
The lodging mechanism control circuit of a kind of interlocking and overcurrent protection, for controlling motor positive and inverse, it is characterized in that, this control circuit comprises forward conduction control relay, reverse-conducting control relay, protection relay, described forward conduction control relay, reverse-conducting control relay and protection relay all comprise the normally closed pin of A group switch separately, A group switching over pin, A group switch often opens pin, the normally closed pin of B group switch, B group switching over pin and B group switch often open pin, the B group switch of described forward conduction control relay is often driven pin and the B group switch of reverse-conducting control relay and is often opened the terminal that pin is connected motor together, the A group switch of described forward conduction control relay is often driven pin and the A group switch of reverse-conducting control relay and is often opened another terminal that pin is connected motor together, the B group switching over pin of described forward conduction control relay and the equal ground connection of A group switching over pin of reverse-conducting control relay, the A group switching over pin of described forward conduction control relay connects the normally closed pin of B group switch of described protection relay, the A group switch that the B group switching over pin of described reverse-conducting control relay connects described protection relay often opens pin, the A group switching over pin of described protection relay is connected power supply with B group switching over pin.
Preferably, described forward conduction control relay, reverse-conducting control relay, protection relay adopt identical relay.
Preferably, described control circuit be also included in electric current excessive time cut off the self-recoverage switch of driving power in time, this self-recoverage switch is connected between described protection relay and power supply.
Preferably, described identical relay is the relay of band two groups of independence diverter switches.
A piezo-resistance in parallel between two terminals of described motor.
Compared with prior art, the utility model has the following advantages:
1, adopt three relays to be connected to form control circuit, can prevent from causing driving power short circuit when single-chip microcomputer or electrical fault, thus the safe and stable operation of energy available protecting circuit;
2, a piezo-resistance in parallel between motor two-terminal, even if relay produces surge in adhesive with when disconnecting, it also can not cause motor both end voltage too high and damage motor;
3, add a self-recoverage switch, can prevent from, when electric motor short circuit fault produces big current, burning circuit;
4, also have that cost is low, simplicity of design, practicality advantages of higher.
Accompanying drawing explanation
Fig. 1 is traditional lodging mechanism control circuit schematic diagram;
Fig. 2 is lodging mechanism control circuit schematic diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment
The utility model provides the lodging mechanism control circuit of a kind of interlocking with overcurrent protection; be mainly used in controlling motor positive and inverse; as shown in Figure 1, this control circuit forms primarily of forward conduction control relay U1, reverse-conducting control relay U3, protection relay U2 its circuit structure.Forward conduction control relay U1, reverse-conducting control relay U3, protection relay U2 can adopt the relay of same structure or the relay of different structure; but no matter adopt which kind of mode, its forward conduction control relay, reverse-conducting control relay and protection relay all need to comprise the normally closed pin of A group switch separately, A group switching over pin, A group switch often drive pin, the normally closed pin of B group switch, B group switching over pin and B group switch and often open pin.During connection, the B group switch of forward conduction control relay is often driven pin and the B group switch of reverse-conducting control relay and is often opened the terminal that pin is connected motor together; The A group switch of forward conduction control relay is often driven pin and the A group switch of reverse-conducting control relay and is often opened another terminal that pin is connected motor together; The B group switching over pin of forward conduction control relay and the equal ground connection of A group switching over pin of reverse-conducting control relay; The A group switching over pin of forward conduction control relay connects the normally closed pin of B group switch of protection relay; The A group switch of the B group switching over pin connection protection relay of reverse-conducting control relay often opens pin; The A group switching over pin of protection relay is connected power supply with B group switching over pin.
The forward conduction control relay of the present embodiment, reverse-conducting control relay, protection relay adopts identical relay, and adopt HF115F-A model relay, this model relay has two groups of single-pole double-throw switch (SPDT)s, there is relay coil positive voltage input (1 pin), relay coil negative voltage input (2 pin), the normally closed pin of A group switch (3 pin), A group switching over pin (4 pin), pin (5 pin) often opened by A group switch, the normally closed pin of B group switch (6 pin), B group switching over pin (7 pin), pin (8 pin) often opened by B group switch.Time relay coil is not energized, A group 6,7 pin connects, and B group 3,4 pin links; When relay 1,2 pin pressure reduction is+24V, relay adhesive, now A group 6,7 pin disconnects, and 7,8 pin connect simultaneously, and B group 3,4 pin disconnects, and 4,5 pin connect simultaneously.During connection, the B group switch of forward conduction control relay U1 is often driven pin (8 pin) and the B group switch of reverse-conducting control relay U3 and is often opened the A terminal that pin (8 pin) is connected motor together; The A group switch of forward conduction control relay U1 is often driven pin (5 pin) and the A group switch of reverse-conducting control relay U3 and is often opened the B terminal that pin (5 pin) is connected motor together; The B group switching over pin (7 pin) of forward conduction control relay U1 and the A group switching over pin (4 pin) of reverse-conducting control relay U3 all ground connection; The A group switching over pin (4 pin) of forward conduction control relay U1 connects the normally closed pin of B group switch (6 pin) of protection relay U2; Pin (5 pin) often opened by the A group switch that the B group switching over pin (7 pin) of reverse-conducting control relay U3 connects protection relay U2; The A group switching over pin (4 pin) of protection relay U3 is connected power supply with B group switching over pin (7 pin).Wherein, connect diode D1, D2, a D3 respectively between the relay coil positive voltage input (1 pin) of U1, U2, U3 relay, relay coil negative voltage input (2 pin), diode cathode end connects relay coil negative voltage input (2 pin).
When needs control motor rotates forward, only need closed forward conduction control relay U1 (U2, U3 disconnect), now motor A terminal ground, motor B terminal obtains electric, motor turn.When needs control motor rotates backward, only need closed reverse-conducting control relay U3 and protection relay U2 (U1 disconnection), now motor A terminal obtains electric, motor B terminal ground, and motor reversal moves.Even if fault causes forward conduction to control to control simultaneously to electricity with reverse-conducting, now 3 relay adhesives, motor A terminal connects driving power, and B terminal ground, rotates backward, and can not cause driving power short circuit.
In addition, because the adhesive of relay and disconnection can produce surge, thus can between motor A, B two-terminal a piezo-resistance in parallel, thus prevent the too high damage motor of motor both end voltage.
Further, consider that the possible fault of motor can cause motor A terminal and the B short-circuit of terminals, thus causing source current excessive, the utility model adds a rapid-action self-recoverage switch at driving power place, cut off driving power in time prevent from burning circuit when electric current is excessive.And power supply place is also respectively by electric capacity C1, C2 ground connection.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; it should be pointed out that all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (5)
1. the lodging mechanism control circuit of an interlocking and overcurrent protection, for controlling motor positive and inverse, it is characterized in that, this control circuit comprises forward conduction control relay, reverse-conducting control relay, protection relay, described forward conduction control relay, reverse-conducting control relay and protection relay all comprise the normally closed pin of A group switch separately, A group switching over pin, A group switch often opens pin, the normally closed pin of B group switch, B group switching over pin and B group switch often open pin, the B group switch of described forward conduction control relay is often driven pin and the B group switch of reverse-conducting control relay and is often opened the terminal that pin is connected motor together, the A group switch of described forward conduction control relay is often driven pin and the A group switch of reverse-conducting control relay and is often opened another terminal that pin is connected motor together, the B group switching over pin of described forward conduction control relay and the equal ground connection of A group switching over pin of reverse-conducting control relay, the A group switching over pin of described forward conduction control relay connects the normally closed pin of B group switch of described protection relay, the A group switch that the B group switching over pin of described reverse-conducting control relay connects described protection relay often opens pin, the A group switching over pin of described protection relay is connected power supply with B group switching over pin.
2. the lodging mechanism control circuit of a kind of interlocking according to claim 1 and overcurrent protection, it is characterized in that, described forward conduction control relay, reverse-conducting control relay, protection relay adopt identical relay.
3. the lodging mechanism control circuit of a kind of interlocking according to claim 1 and overcurrent protection; it is characterized in that; described control circuit be also included in electric current excessive time cut off the self-recoverage switch of driving power in time, this self-recoverage switch is connected between described protection relay and power supply.
4. the lodging mechanism control circuit of a kind of interlocking according to claim 2 and overcurrent protection, it is characterized in that, described identical relay is the relay of band two groups of independence diverter switches.
5. a kind of interlocking according to claim 1 and the lodging mechanism control circuit of overcurrent protection, is characterized in that, a piezo-resistance in parallel between two terminals of described motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420618905.0U CN204145361U (en) | 2014-10-23 | 2014-10-23 | The lodging mechanism control circuit of interlocking and overcurrent protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420618905.0U CN204145361U (en) | 2014-10-23 | 2014-10-23 | The lodging mechanism control circuit of interlocking and overcurrent protection |
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| Publication Number | Publication Date |
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| CN204145361U true CN204145361U (en) | 2015-02-04 |
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| CN201420618905.0U Active CN204145361U (en) | 2014-10-23 | 2014-10-23 | The lodging mechanism control circuit of interlocking and overcurrent protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546722A (en) * | 2017-09-01 | 2018-01-05 | 北京机械设备研究所 | A kind of DC motor positive and negative rotation protects control circuit |
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2014
- 2014-10-23 CN CN201420618905.0U patent/CN204145361U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546722A (en) * | 2017-09-01 | 2018-01-05 | 北京机械设备研究所 | A kind of DC motor positive and negative rotation protects control circuit |
| CN107546722B (en) * | 2017-09-01 | 2019-04-19 | 北京机械设备研究所 | A kind of DC motor positive and negative rotation protection control circuit |
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| GR01 | Patent grant |