CN217216005U - Power-down protection circuit of motion controller and motion controller - Google Patents
Power-down protection circuit of motion controller and motion controller Download PDFInfo
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- CN217216005U CN217216005U CN202123354584.7U CN202123354584U CN217216005U CN 217216005 U CN217216005 U CN 217216005U CN 202123354584 U CN202123354584 U CN 202123354584U CN 217216005 U CN217216005 U CN 217216005U
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Abstract
The utility model relates to a motion controller's power fail safe circuit and motion controller, the protection circuit includes voltage input line, voltage monitoring circuit, filtering protection circuit, prevents that voltage downpour circuit, two-way buck-boost control module and super capacitor group, voltage monitoring circuit, filtering protection circuit set up on the voltage input line with preventing that voltage downpour circuit sets up, voltage input line, two-way buck-boost control module and super capacitor group connect gradually, voltage input line and two-way buck-boost control module all are connected with and are used for connecting motion controller's power end, voltage monitoring circuit is connected with and is used for connecting motion controller's switching on and shutting signal end. Compared with the prior art, the utility model has the advantages of do not influence normal switching on and shutting down action, can integrate multiple protect function etc.
Description
Technical Field
The utility model belongs to the technical field of industry motion control technique and specifically relates to a motion controller's power down protection circuit and motion controller are related to.
Background
The motion controller is used as an industrial automatic control brain, the power can be directly cut off when the whole electrical system is cut off, when the situation occurs, on one hand, a storage disk of the motion controller can be damaged, the service life of the controller is shortened, on the other hand, data can be suddenly lost, and wrong actions can be made after the system is restarted.
At present, in order to solve the above problems, the following schemes are common:
in the first scheme, a chemical battery is used as a backup power supply of the motion controller, the charging time of the chemical battery is long, in addition, the charging process generates heat, and if the chemical battery is closed in a narrow space, the chemical battery is dangerous.
The other scheme is that an external power supply charges the super capacitor bank through a charging management circuit, the super capacitor bank is also used as a power supply of a subsequent motion controller and other electric systems, and standard voltage required by the motion controller is generated through a step-up and step-down circuit. According to the scheme, the charging management circuit and the buck-boost circuit are required to be used for realizing corresponding functions, the control system is influenced by the charging process of the super capacitor bank in the power-on process, and the power-on processes of the motion controller and the electric system are slow.
And the scheme III uses a system storage disk with power failure management, can protect the system storage disk from being influenced by sudden disconnection of an external power supply, but cannot supply power to the whole controller, and communication data with the outside cannot be stored in time when the external power supply is suddenly disconnected.
And the scheme IV uses the UPS power supply to serve as a backup power supply for the motion controller, and is complex, large in overall size and expensive in price.
Disclosure of Invention
The purpose of the present invention is to provide a power down protection circuit and a motion controller of a motion controller without affecting normal on/off operation for overcoming the defects of the prior art.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides a power down protection circuit of motion controller, includes voltage input line, voltage monitoring circuit, filtering protection circuit, prevents that voltage downpour circuit, two-way buck-boost control module and super capacitor group, voltage monitoring circuit, filtering protection circuit and prevent that voltage downpour circuit sets up on the voltage input line, two-way buck-boost control module and super capacitor group connect gradually, voltage input line and two-way buck-boost control module all are connected with and are used for connecting motion controller's power end, voltage monitoring circuit connection has and is used for connecting motion controller's switch machine signal end.
Furthermore, the voltage monitoring circuit is connected to a voltage input line between the filter protection circuit and the voltage backflow prevention circuit.
Further, the bidirectional buck-boost control module comprises a forward synchronous buck circuit and a reverse synchronous boost circuit, and the forward synchronous buck circuit, the super capacitor bank and the reverse synchronous boost circuit are connected in sequence.
Further, the bidirectional buck-boost control module adopts an ISL81401 chip.
Further, the voltage monitoring circuit adopts a TPS3808G01DBVT chip.
Furthermore, all parts of the power failure protection circuit are integrated on a circuit board.
Furthermore, the bottom of the circuit board is provided with a fixing stud for enabling the power-down protection circuit to be arranged on the motion controller in a laminated mode.
Further, the fixing studs are patch tinned copper studs.
The utility model also provides a motion control ware with power down protection, include as above power down protection circuit.
Furthermore, the power switch of the motion controller is a power switch with a power-on and power-off pressing characteristic.
Compared with the prior art, the utility model discloses following beneficial effect has:
1) the utility model supplies power to the motion controller while charging the super capacitor bank, and the super capacitor bank can supply power to the motion controller reversely when the power is off, and integrates multiple protection functions such as current-limiting protection and overheat protection in the charging and discharging process of the super capacitor bank;
2) when the external power supply is disconnected, the super capacitor bank is switched to be a power supply, and the required working voltage can be output in zero delay without influencing the normal shutdown action of the motion controller;
3) the utility model discloses a circuit board size is very little, can install in the shell with motion controller together, and very nimble cooperation motion controller realizes the function of power down protection.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of an embodiment of the present invention connected to a motion controller;
FIG. 3 is a schematic diagram of an embodiment of a filter protection circuit and a voltage-back-flow prevention circuit;
FIG. 4 is a schematic diagram of an embodiment of a voltage monitoring circuit;
fig. 5 is a schematic diagram of an embodiment of a bidirectional buck-boost control module.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, this embodiment provides a power down protection circuit of a motion controller, including a voltage input line, a voltage monitoring circuit 2, a filter protection circuit 1, a voltage-back-up prevention circuit 3, a bidirectional buck-boost control module and a super capacitor set 6, where the voltage monitoring circuit 2, the filter protection circuit 1 and the voltage-back-up prevention circuit 3 are disposed on the voltage input line, the bidirectional buck-boost control module and the super capacitor set 6 are connected in sequence, the voltage input line and the bidirectional buck-boost control module are both connected with power supply terminals for connecting a motion controller 7, and the voltage monitoring circuit 2 is connected with a switch signal terminal for connecting the motion controller 7.
In this embodiment, the voltage monitoring circuit 2 is connected to a voltage input line between the filter protection circuit 1 and the voltage backflow prevention circuit 3, and an external power supply is respectively input to the voltage monitoring circuit 2 and the voltage backflow prevention circuit 3 after passing through the filter protection circuit. One embodiment of the filter protection circuit 1 and the voltage backflow prevention circuit 3 is shown in fig. 3, wherein F1 and C2 implement the filter protection function, and D1 implements the voltage backflow prevention function.
In one embodiment, the bidirectional buck-boost control module comprises a forward synchronous buck circuit 4 and a reverse synchronous boost circuit 5, and the forward synchronous buck circuit 4, the super capacitor bank 6 and the reverse synchronous boost circuit 5 are connected in sequence. When an external power supply supplies power, the motion controller 7 is powered by the power supply of the voltage-proof reverse-filling circuit 3, and the super capacitor bank 6 is charged by the forward synchronous voltage-reducing circuit 4; when the external power supply is suddenly cut off, the super capacitor bank 6 supplies power to the motion controller 7 through the reverse synchronous booster circuit 5.
In another preferred embodiment, the bidirectional buck-boost control module is a bidirectional buck-boost control chip with an overcurrent and overheat protection function, that is, the forward synchronous buck circuit function, the reverse synchronous boost circuit function and the overcurrent and overheat protection function are implemented by a single chip, so that overcurrent and overheat protection is provided during the charging process, and the current-limiting and overcurrent protection function is provided during the discharging process, for example, if the chip ISL81401 is adopted, a specific circuit thereof is shown in fig. 5. The chip is in a bidirectional mode, and power can flow from the input end to the output end or from the output end to the input end. Each direction can be a voltage reduction mode or a voltage boosting mode, the voltage reduction mode or the voltage boosting mode is that the input voltage is determined when the chip is outside, and the output voltage is set according to the voltage of the feedback pin and the voltage dividing resistor. That is, the voltage-reducing mode is set according to the external voltage and the resistance when the power is supplied in the forward direction, and the voltage-increasing mode is set according to the external voltage and the resistance when the power is supplied in the reverse direction.
In one embodiment, the voltage monitoring circuit 2 employs a TPS3808G01DBVT chip, and the specific circuit thereof is as shown in fig. 4. The voltage monitoring circuit is located at the input end of the external power supply, the voltage value of the power supply is monitored constantly, when the external power supply is disconnected suddenly, the voltage monitoring circuit monitors that the input voltage value of the power supply is lower than a set value and then immediately sends a soft shutdown signal to the motion controller, meanwhile, the super capacitor bank supplies power to the motion controller through the reverse synchronous booster circuit, the external power supply can be switched to supply power to the super capacitor bank in zero time delay, until the motion controller finishes normal shutdown action, the use of a storage disk cannot be influenced, and the normal storage of communication data is finished.
In a preferred embodiment, the above-described components of the power down protection circuit are integrated on a circuit board 8, as shown in fig. 2. The bottom of the circuit board 8 is provided with a fixing stud 9 which is used for enabling the power down protection circuit to be arranged on the motion controller in a laminated mode, and in the embodiment, the fixing stud 9 is a patch tinned copper stud. The circuit board 8 is small in size, and the flexibility of the functional configuration is increased.
The power-down protection method of the motion controller based on the power-down protection circuit comprises an external power supply normal power supply mode and a power supply disconnection mode, wherein in the external power supply normal power supply mode, the external power supply sequentially passes through the filtering protection circuit and the voltage-resistant reverse-charging circuit to supply power to the motion controller, and simultaneously charges the super capacitor bank through the bidirectional buck-boost control module.
In another embodiment, the method further includes a power-on mode, in which the voltage monitoring circuit monitors whether the external power supply reaches a normal power supply voltage, if so, the power switch of the direct-contact motion controller is turned on, and if not, the power switch of the delayed-trigger motion controller is turned on.
The specific implementation process of the power failure protection method of the motion controller comprises the following steps:
a) when the external power supply normally supplies power, the external voltage supplies power to the motion controller, and meanwhile, the voltage reduction mode of the bidirectional buck-boost controller is used for charging the super capacitor bank until the super capacitor bank is full of the voltage. The charging process has the functions of current limiting, overcurrent and overheat protection.
b) When the external power supply is suddenly disconnected, the super capacitor bank reversely supplies power to the motion controller through the boosting mode of the bidirectional buck-boost controller until the motion controller finishes normal shutdown. The discharge process has the function of current-limiting and overcurrent protection.
c) The zero-delay switching from the external power supply to the super capacitor bank can be realized in the process from normal power supply to sudden disconnection of the external power supply, and the power supply stability of the motion controller is ensured.
d) When the voltage monitor monitors that the external power supply of the system is disconnected, the power-on and power-off signal of the motion controller is triggered immediately to realize power-off, the normal power-off process is completed under the continuous energy supply of the super capacitor bank, data cannot be lost, and a storage medium cannot be damaged.
e) When the controller is started again and the external power supply does not reach the normal power supply voltage range, the voltage monitoring circuit outputs a low level for a certain time, about dozens of milliseconds, and the low level triggers a startup and shutdown signal of the controller to enable the controller to be started normally until the external voltage reaches the power supply voltage of the controller.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The power failure protection circuit of the motion controller is characterized by comprising a voltage input line, a voltage monitoring circuit, a filtering protection circuit, a voltage backflow prevention circuit, a bidirectional buck-boost control module and a super capacitor set, wherein the voltage monitoring circuit, the filtering protection circuit and the voltage backflow prevention circuit are arranged on the voltage input line, the bidirectional buck-boost control module and the super capacitor set are sequentially connected, the voltage input line and the bidirectional buck-boost control module are both connected with power supply ends used for being connected with the motion controller, and the voltage monitoring circuit is connected with a switch signal end used for being connected with the motion controller.
2. The power down protection circuit of a motion controller according to claim 1, wherein the voltage monitoring circuit is connected to a voltage input line between the filter protection circuit and the voltage backflow prevention circuit.
3. The power down protection circuit of a motion controller according to claim 1, wherein the bidirectional buck-boost control module comprises a forward synchronous buck circuit and a reverse synchronous boost circuit, and the forward synchronous buck circuit, the super capacitor bank and the reverse synchronous boost circuit are connected in sequence.
4. The power down protection circuit of a motion controller according to claim 1, wherein the bidirectional buck-boost control module employs an ISL81401 chip.
5. The power down protection circuit of a motion controller according to claim 1, wherein the voltage monitoring circuit employs a TPS3808G01DBVT chip.
6. The power down protection circuit of a motion controller according to claim 1, wherein the components of the power down protection circuit are integrally disposed on a circuit board.
7. The power-down protection circuit of a motion controller according to claim 6, wherein a fixing stud for enabling the power-down protection circuit to be arranged on the motion controller in a laminated manner is arranged at the bottom of the circuit board.
8. The power down protection circuit of a motion controller according to claim 7, wherein the fixing studs are surface mount tinned copper studs.
9. A motion controller with power down protection, comprising a power down protection circuit according to any of claims 1-8.
10. The motion controller with power down protection as claimed in claim 9, wherein the power switch of the motion controller is a power switch with a power-on and power-off feature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123354584.7U CN217216005U (en) | 2021-12-29 | 2021-12-29 | Power-down protection circuit of motion controller and motion controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123354584.7U CN217216005U (en) | 2021-12-29 | 2021-12-29 | Power-down protection circuit of motion controller and motion controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217216005U true CN217216005U (en) | 2022-08-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123354584.7U Active CN217216005U (en) | 2021-12-29 | 2021-12-29 | Power-down protection circuit of motion controller and motion controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217216005U (en) |
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2021
- 2021-12-29 CN CN202123354584.7U patent/CN217216005U/en active Active
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