CN210007643U - Anti-interference circuit of motor protector - Google Patents
Anti-interference circuit of motor protector Download PDFInfo
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- CN210007643U CN210007643U CN201921028974.5U CN201921028974U CN210007643U CN 210007643 U CN210007643 U CN 210007643U CN 201921028974 U CN201921028974 U CN 201921028974U CN 210007643 U CN210007643 U CN 210007643U
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Abstract
The utility model relates to a low-voltage apparatus technical field just discloses electric circuit is prevented shaking by motor protector, a serial communication port, including rectifier circuit, its input and input interface electric connection, the output divide into positive output, negative pole output, wherein positive output and detection circuitry's end electric connection, negative pole output and output interface's negative pole electric connection, energy storage circuit, its end with detection circuitry's other end electric connection, in addition end respectively with negative pole output, output interface's positive pole electric connection, one-way circuit, its end with rectifier circuit electric connection, its other end with output interface electric connection, the utility model discloses small, low price, nimble can dismantle, protection time is long, and measured data is quick, accurate.
Description
Technical Field
The utility model relates to a low-voltage apparatus technical field specifically is anti-electricity-dazzling circuit of motor protector.
Background
The phenomenon that the voltage of a power grid fluctuates greatly in a short time due to lightning stroke, short circuit to the ground, reclosing, equipment starting, power plant faults and other reasons, the power grid drops or loses power instantly, and the power grid recovers to be normal within 1.5s is avoided. When the interference occurs, because the system voltage can not meet the self-holding requirement of the alternating current contactor, the contactor can generate 'abnormal release', so the interference phenomenon easily causes large-area parking of production equipment, great loss is caused to continuous production enterprises, and even equipment accidents and personal accidents are caused. At present, part of motor protectors have an anti-interference function, and because the motor protectors control power supplies mostly adopt switching power supplies, and relay action points are fixed and unadjustable, the motor protectors are inflexible, large in size, high in cost, short in protection time, voltage measurement signals of the motor protectors are untimely and accurate, and contactors are disconnected during interference of electricity, so that recovery voltage cannot be measured.
Disclosure of Invention
To prior art not enough, the utility model provides an anti-electricity-dazzling circuit of motor protector, small, low price, nimble can dismantle, the guard time is long, and measured data is quick, accurate.
In order to achieve the purpose, the utility model provides an anti-interference circuit of motor protectors, comprising:
the input end of the rectifying circuit is electrically connected with the input interface, and the output end of the rectifying circuit is divided into a positive electrode output end and a negative electrode output end, wherein the positive electrode output end is electrically connected with the end of the detection circuit, and the negative electrode output end is electrically connected with the negative electrode of the output interface;
the end of the energy storage circuit is electrically connected with the end of the detection circuit, and the end of the energy storage circuit is electrically connected with the negative electrode output end and the positive electrode of the output interface respectively;
a unidirectional circuit, wherein an end of the unidirectional circuit is electrically connected with the rectifying circuit, and another end of the unidirectional circuit is electrically connected with the output interface;
the detection circuit comprises an th resistor group, a second resistor group and a th capacitor C1, wherein the anode of the capacitor C1 is electrically connected with the anode output end and the end of the th resistor group respectively, the cathode of the capacitor C1 is connected with the cathode output end, the other end of the th resistor group is electrically connected with the end of the second resistor group, and the other end of the second resistor group is electrically connected with the end of the energy storage circuit.
Preferably, the energy storage circuit includes an th capacitor bank and a th diode D1, wherein a cathode of the th capacitor bank is electrically connected to the cathode output terminal and a cathode of the capacitor C1, an anode of the th capacitor bank is electrically connected to another terminal of the second resistor bank and an anode of the th diode D1, and a cathode of the th diode D1 is electrically connected to an anode of the output interface.
Preferably, the th capacitor bank comprises a second capacitor C2 and a third capacitor C3, wherein the second capacitor C2 is connected in parallel with the third capacitor C3.
Preferably, the resistor group includes a resistor R1, a second resistor R2, and a third resistor R3, wherein the resistor R1 is connected in parallel with the second resistor R2, wherein the resistor R1 is connected in parallel with the third resistor R3, and wherein the second resistor R2 is connected in parallel with the third resistor R3.
Preferably, the second resistor group comprises a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6, wherein the fourth resistor R4 is connected in parallel with the fifth resistor R5, wherein the fourth resistor R4 is connected in parallel with the sixth resistor R6, wherein the fifth resistor R5 is connected in parallel with the sixth resistor R6.
Preferably, the unidirectional circuit is fuses.
Preferably, the rectification circuit comprises an NTC2 piezoresistor and a BR1 full-wave rectification bridge, wherein the NTC2 piezoresistor is connected with the BR1 full-wave rectification bridge in parallel.
Preferably, the input interface is connected to an alternating current input terminal.
Preferably, the output interface is connected to an auxiliary power input of the motor protector.
Compared with the prior art, the utility model provides an anti-interference circuit of kinds of motor protector possesses following beneficial effect:
when the utility model is used, the AC input is connected with the input interface of the utility model, the output interface of the utility model is connected with the input end of the auxiliary power supply of the motor protector, the voltage measuring signal of the motor protector is taken from the upper level of the contactor, the contactor is disconnected when the electricity is prevented from shaking, and the recovery voltage can not be measured; when the power supply is normal, the energy storage circuit of the utility model is in an energy storage state, and the energy storage circuit supplies power to the motor protector during the electricity shaking period to maintain the normal work of the motor protector; when the system voltage recovers to the restarting voltage, the motor protector judges the power-shaking duration time, and the time is less than the power-shaking restarting delay, and the protector immediately attracts a switching-on contact to start the motor; the power-off time is longer than the power-off restarting delay, and the starting is not executed.
The utility model discloses a rectifier circuit, unidirectional circuit, detection circuitry, tank circuit, input interface, output interface, rectifier circuit output way through unidirectional circuit direct with output interface connection, way through detection circuitry, tank circuit and output interface connection, detection circuitry is by series resistance partial pressure, parallel resistance reposition of redundant personnel principle, when making grid voltage normal work, tank circuit is in the energy storage state, and tank circuit begins work when grid voltage is less than the default.
Different from current anti-interference circuit, the utility model discloses a parallelly connected energy storage of two big electric capacity has prolonged protection operating time, has with low costs, small, nimble detachable advantage as the isolated plant.
The utility model discloses a reverse current appears in the tank circuit during operation is prevented to diode D1's effect, makes circuit work abnormal.
When the voltage of the power grid is lower than 30% of the rated voltage, the contactor is tripped, and the protection starts to carry out the electricity dazzling timing; when the voltage of the power grid is higher than 70% of the rated voltage, the protection stops the electricity dazzling timer.
Drawings
Fig. 1 is a circuit diagram of the present invention;
fig. 2 is an external view of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of , but not all embodiments.
Referring to fig. 1 and 2, a motor protector anti-interference circuit includes a rectifying circuit having an input end electrically connected to an input interface and an output end divided into a positive output end and a negative output end, wherein the positive output end is electrically connected to a end of a detection circuit, and the negative output end is electrically connected to a negative electrode of the output interface;
preferably, the detection circuit includes a third resistor group, a second resistor group, and a third capacitor C, wherein an anode of the capacitor C is electrically connected to the anode output terminal and 1 terminal of the 0 th resistor group, respectively, a cathode of the capacitor C is connected to the cathode output terminal, the other terminal of the 2 nd resistor group is electrically connected to a terminal of the second resistor group, the other terminal of the second resistor group is electrically connected to a terminal of the energy storage circuit, the third resistor group includes a second resistor R, and a third resistor R, wherein the third resistor R is connected in parallel to the second resistor R, wherein the second resistor R is connected in parallel to the third resistor R, the second resistor group includes a fourth resistor R, a fifth resistor R, and a sixth resistor R, wherein the fourth resistor R is connected in parallel to the fifth resistor R, wherein the fifth resistor R is connected in parallel to the sixth resistor R, and the fifth resistor R is connected in parallel to the sixth resistor R.
Preferably, the energy storage circuit comprises an th capacitor bank and a th diode D1, wherein a cathode end of the th capacitor bank is electrically connected with the cathode output end and a cathode of the capacitor C1 respectively, an anode of the th capacitor bank is electrically connected with another end of the second resistor bank and an anode of a th diode D1 respectively, a cathode of the th diode D1 is electrically connected with an anode of the output interface, the th capacitor bank comprises a second capacitor C2 and a third capacitor C3, and the second capacitor C2 is connected with the third capacitor C3 in parallel.
Preferably, the unidirectional circuit is fuses, the rectification circuit comprises an NTC2 voltage-dependent resistor and a BR1 full-wave rectification bridge, wherein the NTC2 voltage-dependent resistor is connected with the BR1 full-wave rectification bridge in parallel, the input interface is connected to an alternating current input end, and the output interface is connected to an auxiliary power supply input end of the motor protector.
To sum up, when the utility model is used, the alternating current input is connected with the input interface of the utility model, the output interface of the utility model is connected with the input end of the auxiliary power supply of the motor protector, the voltage measuring signal of the motor protector is taken from the upper level of the contactor, when the electricity is prevented from shaking, the contactor is disconnected, and the recovery voltage can not be measured; when the power supply is normal, the energy storage circuit of the utility model is in an energy storage state, and the energy storage circuit supplies power to the motor protector during the electricity shaking period to maintain the normal work of the motor protector; when the system voltage recovers to the restarting voltage, the motor protector judges the power-shaking duration time, and the time is less than the power-shaking restarting delay, and the protector immediately attracts a switching-on contact to start the motor; the power-off time is longer than the power-off restarting delay, and the starting is not executed.
The utility model discloses a rectifier circuit, unidirectional circuit, detection circuitry, tank circuit, input interface, output interface, rectifier circuit output way through unidirectional circuit direct with output interface connection, way through detection circuitry, tank circuit and output interface connection, detection circuitry is by series resistance partial pressure, parallel resistance reposition of redundant personnel principle, when making grid voltage normal work, tank circuit is in the energy storage state, and tank circuit begins work when grid voltage is less than the default.
Different from the existing anti-interference circuit, the utility model adopts two large capacitors to store energy in parallel, prolongs the protection working time, and has the advantages of low cost, small volume, flexibility and detachability as a single device; the diode D1 of the utility model prevents the reverse current when the energy storage circuit works and makes the circuit work abnormally; when the voltage of the power grid is lower than 30% of the rated voltage, the contactor is tripped, and the protection starts to carry out the electricity dazzling timing; when the voltage of the power grid is higher than 70% of the rated voltage, the protection stops the electricity dazzling timer.
It should be noted that, in this document, relational terms such as , second and the like are only used to distinguish entities or operations from another entities or operations, and no necessarily requires or implies that any such actual relationship or order exists between the entities or operations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1, kind of motor protector anti-interference electricity circuit, characterized by, includes:
the input end of the rectifying circuit is electrically connected with the input interface, and the output end of the rectifying circuit is divided into a positive electrode output end and a negative electrode output end, wherein the positive electrode output end is electrically connected with the end of the detection circuit, and the negative electrode output end is electrically connected with the negative electrode of the output interface;
the end of the energy storage circuit is electrically connected with the end of the detection circuit, and the end of the energy storage circuit is electrically connected with the negative electrode output end and the positive electrode of the output interface respectively;
a unidirectional circuit, wherein an end of the unidirectional circuit is electrically connected with the rectifying circuit, and another end of the unidirectional circuit is electrically connected with the output interface;
the detection circuit comprises an th resistor group, a second resistor group and a th capacitor C1, wherein the anode of the capacitor C1 is electrically connected with the anode output end and the end of the th resistor group respectively, the cathode of the capacitor C1 is connected with the cathode output end, the other end of the th resistor group is electrically connected with the end of the second resistor group, and the other end of the second resistor group is electrically connected with the end of the energy storage circuit.
2. The kind of motor protector anti-interference circuit of claim 1, wherein the energy storage circuit includes a th capacitor bank, a th diode D1, wherein the negative pole of the th capacitor bank is electrically connected to the negative pole output terminal and the negative pole of the capacitor C1, the positive pole of the th capacitor bank is electrically connected to the other of the second resistor bank and the positive pole of the th diode D1, and the negative pole of the th diode D1 is electrically connected to the positive pole of the output interface.
3. The electric sloshing preventing circuit of motor protector as claimed in claim 2, wherein said capacitor group includes a second capacitor C2 and a third capacitor C3, and wherein said second capacitor C2 is connected in parallel with said third capacitor C3.
4. The electric shock interference preventing circuit of motor protector as claimed in claim 1, wherein the resistor group includes a resistor R1, a second resistor R2 and a third resistor R3, wherein the resistor R1 is connected in parallel with the second resistor R2, wherein the resistor R1 is connected in parallel with the third resistor R3, and wherein the second resistor R2 is connected in parallel with the third resistor R3.
5. The electric shock resistance circuit of motor protector according to claim 1, wherein the second resistor group comprises a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6, wherein the fourth resistor R4 is connected in parallel with the fifth resistor R5, wherein the fourth resistor R4 is connected in parallel with the sixth resistor R6, and wherein the fifth resistor R5 is connected in parallel with the sixth resistor R6.
6. The electric shock resistance circuit of motor protector as claimed in claim 1, wherein the unidirectional circuit is fuses.
7. The electric shock resistance circuit of motor protector of claim 1, wherein the rectification circuit comprises NTC2 voltage dependent resistor and BR1 full wave rectifier bridge, and the NTC2 voltage dependent resistor is connected in parallel with the BR1 full wave rectifier bridge.
8. The electric shock immunity circuit of motor protector as set forth in claim 1, wherein said input interface is connected to an AC input.
9. The motor protector anti-interference circuit of claim 1, wherein the output interface is connected to the auxiliary power input of the motor protector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921028974.5U CN210007643U (en) | 2019-07-03 | 2019-07-03 | Anti-interference circuit of motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921028974.5U CN210007643U (en) | 2019-07-03 | 2019-07-03 | Anti-interference circuit of motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210007643U true CN210007643U (en) | 2020-01-31 |
Family
ID=69310406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921028974.5U Active CN210007643U (en) | 2019-07-03 | 2019-07-03 | Anti-interference circuit of motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210007643U (en) |
-
2019
- 2019-07-03 CN CN201921028974.5U patent/CN210007643U/en active Active
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