CN211529816U - Automatic change-over switch position signal detection circuit and automatic change-over switch - Google Patents
Automatic change-over switch position signal detection circuit and automatic change-over switch Download PDFInfo
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- CN211529816U CN211529816U CN202020494222.4U CN202020494222U CN211529816U CN 211529816 U CN211529816 U CN 211529816U CN 202020494222 U CN202020494222 U CN 202020494222U CN 211529816 U CN211529816 U CN 211529816U
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Abstract
The utility model discloses an automatic transfer switch position signal detection circuit, which comprises a microswitch, a power circuit and a signal output circuit, wherein the microswitch is related to the position of the automatic transfer switch; the power supply circuit comprises a rectifying circuit, and a capacitor filter circuit and a resistor voltage-sharing circuit which are connected in parallel behind the rectifying circuit, wherein the capacitor filter circuit comprises at least two capacitors connected in series, the resistor voltage-sharing circuit comprises resistors connected in series and having the same number as the capacitors in the capacitor filter circuit, and the resistors are connected in parallel in one-to-one correspondence with the capacitors in the capacitor filter circuit. The utility model also discloses an automatic change-over switch. Compared with the prior art, the utility model discloses can realize the effect of short-term test, prevent the wrong wiring, reduce the current-limiting resistance consumption.
Description
Technical Field
The utility model relates to an automatic change over switch position signal detection circuitry.
Background
The automatic change-over switch is one of the main elements in the low-voltage distribution system, and plays a significant role in the safe and reliable operation of the low-voltage distribution system. The automatic transfer switch controller judges the switch position signal by detecting the microswitch signal of the switch body, thereby making correct transfer indication. At present, most position signal micro switches adopt high-voltage micro switches, and the high-voltage micro switches are reliable in work and accurate in signals. When a large-current Automatic Transfer Switch (ATSE), especially a circuit breaker (such as a frame circuit breaker) is used as an actuator, the on/off position signal micro-switch is generally at the system operating voltage (e.g. 400 VAC).
The conventional position signal detection adopts a method of alternating voltage plus optical coupler detection, the method is analog signal detection, the speed is slow, the software calculation is complex, and the conversion action time of the automatic change-over switch is seriously influenced.
In addition, a digital quantity detection method adopting direct-current voltage plus optical coupler detection is adopted, although the detection speed is high, the detection speed is often limited by capacitance withstand voltage (the maximum withstand voltage of the capacitance is generally 450V), higher voltage cannot be borne, and particularly, the capacitance is damaged when a user mistakenly connects the line voltage; and if full-wave rectification is adopted, the requirement of the rectified smooth direct-current voltage on the power consumption of the current-limiting resistor is relatively high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art not enough, provide one kind can realize the short-term test, prevent the wrong wiring, reduce the automatic transfer switch position signal detection circuitry of current-limiting resistance consumption.
The utility model discloses specifically adopt following technical scheme to solve above-mentioned technical problem:
a position signal detection circuit of an automatic transfer switch comprises a microswitch, a power supply circuit and a signal output circuit, wherein the microswitch is related to the position of the automatic transfer switch; the power supply circuit comprises a rectifying circuit, and a capacitor filter circuit and a resistor voltage-sharing circuit which are connected in parallel behind the rectifying circuit, wherein the capacitor filter circuit comprises at least two capacitors connected in series, the resistor voltage-sharing circuit comprises resistors connected in series and having the same number as the capacitors in the capacitor filter circuit, and the resistors are connected in parallel in one-to-one correspondence with the capacitors in the capacitor filter circuit.
Preferably, the rectifier circuit is a half-wave rectifier circuit.
Preferably, the capacitor filter circuit is composed of two capacitors connected in series, and the resistor voltage equalizing circuit is composed of two resistors connected in series.
Preferably, the signal output circuit is composed of a current limiting resistor, a pull-up resistor and an optocoupler, an input end of the optocoupler is connected with an output end of the power circuit through the current limiting resistor, and the pull-up resistor is connected in series with an output loop of the optocoupler.
Based on the same inventive concept, the following technical scheme can be obtained:
an automatic transfer switch comprises a position signal detection circuit for detecting the switch position of the automatic transfer switch, wherein the position signal detection circuit is the automatic transfer switch position signal detection circuit in any technical scheme.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model has simple structure, low cost and universal input voltage AC and DC; the power consumption of the current-limiting resistor in the circuit is reduced by adopting a half-wave rectification mode, and the defect that the requirement of smooth direct-current voltage on the power consumption of the current-limiting resistor is relatively high is overcome; due to the effect of the capacitor series connection and the resistance voltage-sharing circuit, the circuit can bear line voltage and work normally, the product is prevented from being damaged by wrong wiring of a user, and the defect that the prior art cannot bear higher voltage due to the adoption of direct current and optical coupling is overcome; the utility model overcomes the slow defect of traditional interchange position detection circuit speed can improve ATSE slew rate, reduces ATSE load outage time.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of the present invention.
Detailed Description
Aiming at the defects that the existing alternating current position detection circuit is slow in speed, the direct current position detection circuit cannot bear large voltage and has high requirement on the power consumption of the current-limiting resistor, the utility model discloses a solution idea is to design a power supply circuit for the position detection circuit, reduce the power consumption of the current-limiting resistor in the circuit by adopting a half-wave rectification mode, and overcome the defect that the requirement on the power consumption of the current-limiting resistor is relatively high by smooth direct current voltage; and the bearable line voltage of the detection circuit is improved through the capacitor series connection and the resistor voltage-sharing circuit, so that the product is prevented from being damaged by wrong wiring of a user.
Particularly, the utility model discloses an automatic change over switch position signal detection circuitry, including the micro-gap switch relevant with automatic change over switch position, be used for the power supply circuit of micro-gap switch power supply to and be used for converting micro-gap switch's on-off state into the signal output circuit of signal of telecommunication output; the power supply circuit comprises a rectifying circuit, and a capacitor filter circuit and a resistor voltage-sharing circuit which are connected in parallel behind the rectifying circuit, wherein the capacitor filter circuit comprises at least two capacitors connected in series, the resistor voltage-sharing circuit comprises resistors connected in series and having the same number as the capacitors in the capacitor filter circuit, and the resistors are connected in parallel in one-to-one correspondence with the capacitors in the capacitor filter circuit.
Preferably, the rectifier circuit is a half-wave rectifier circuit.
Preferably, the capacitor filter circuit is composed of two capacitors connected in series, and the resistor voltage equalizing circuit is composed of two resistors connected in series.
Preferably, the signal output circuit is composed of a current limiting resistor, a pull-up resistor and an optocoupler, an input end of the optocoupler is connected with an output end of the power circuit through the current limiting resistor, and the pull-up resistor is connected in series with an output loop of the optocoupler.
For the public understanding, the technical solution of the present invention is explained in detail by a specific embodiment and with reference to the attached drawings:
the automatic transfer switch position signal detection circuit of the present embodiment, as shown in fig. 1, includes a micro switch K1 associated with the position of the automatic transfer switch, a power supply circuit for supplying power to the micro switch K1, and a signal output circuit for converting the switching state of the micro switch K1 into an electric signal to be output;
the power supply circuit comprises a rectifying circuit, and a capacitor filter circuit and a resistor voltage-sharing circuit which are connected in parallel behind the rectifying circuit, wherein the capacitor filter circuit comprises at least two capacitors connected in series, the resistor voltage-sharing circuit comprises resistors connected in series and having the same number as the capacitors in the capacitor filter circuit, and the resistors are connected in parallel in one-to-one correspondence with the capacitors in the capacitor filter circuit; the input end of the rectifying circuit is connected with an alternating current power supply, the output end of the rectifying circuit is connected with the capacitor filter circuit, and the capacitor filter circuit is connected with the resistor voltage-sharing circuit in parallel, so that a power supply circuit is formed, and the alternating current power supply is converted into a direct current power supply VDD.
As shown in fig. 1, the rectifier circuit in this embodiment is a half-wave rectifier circuit, which is composed of a diode D1, the capacitor filter circuit is composed of a capacitor C1 and a capacitor C2 connected in series, the resistor equalizing circuit is composed of a resistor R1 and a resistor R2 connected in series, and the midpoint of the capacitors C1 and C2 is connected to the midpoint of the resistors R1 and R2.
As shown in fig. 1, the signal output circuit of this embodiment is composed of a current limiting resistor R3, an optical coupler O1, and a pull-up resistor R4, and is configured to convert a position signal into an electrical signal, which is sent to a microprocessor for processing. One end of a resistor R3 is connected with a microswitch K1, the other end of a resistor R3 is connected with the upper end of an optical coupler O1 input, the lower end of the optical coupler O1 input is connected with an alternating current power supply N pole, the upper end of the optical coupler O1 output is connected with one end of a pull-up resistor R4, meanwhile, a detected position signal is sent to a microprocessor for processing, the other end of the pull-up resistor R4 is connected with +5V, and the lower end of the optical coupler O1 output is connected with the ground.
When the automatic change-over switch is in a common opening state and a common power supply microswitch (normally closed point) is in a closed position, the common power supply position signal detection circuit sends a low level signal to the microprocessor for processing; the automatic change-over switch is in a common closing state, the common power supply microswitch (a common closing point) is in a disconnection state, and the common power supply position signal detection circuit sends a high level signal to the microprocessor for processing. The standby power supply is the same and will not be described in detail. If the user mistakenly connects the line voltage to the circuit, the circuit can bear the line voltage without damage due to the effect of the capacitor series connection and the voltage equalizing circuit.
The embodiment adopts a half-wave rectification mode, and the voltage value of the half-wave rectification output is lower than that of the full-wave rectification output, so that the power consumption of the current limiting resistor R3 can be reduced.
Claims (5)
1. A position signal detection circuit of an automatic transfer switch comprises a microswitch, a power supply circuit and a signal output circuit, wherein the microswitch is related to the position of the automatic transfer switch; it is characterized in that the power supply circuit comprises a rectifying circuit, a capacitor filter circuit and a resistor voltage-sharing circuit which are connected in parallel behind the rectifying circuit, the capacitor filter circuit comprises at least two capacitors connected in series,
the resistor voltage-sharing circuit comprises resistors which are connected in series and have the same number as the capacitors in the capacitor filter circuit, and the resistors are connected in parallel in one-to-one correspondence with the capacitors in the capacitor filter circuit.
2. The automatic transfer switch position signal detection circuit of claim 1, wherein the rectifier circuit is a half-wave rectifier circuit.
3. The automatic transfer switch position signal detection circuit of claim 1 wherein said capacitive filter circuit is comprised of two capacitors connected in series and said resistive equalizer circuit is comprised of two resistors connected in series.
4. The automatic transfer switch position signal detection circuit as claimed in claim 1, wherein the signal output circuit is composed of a current limiting resistor, a pull-up resistor and an optical coupler, an input end of the optical coupler is connected with an output end of the power circuit through the current limiting resistor, and the pull-up resistor is connected in series in an output loop of the optical coupler.
5. An automatic transfer switch comprising a position signal detection circuit for detecting a switch position of the automatic transfer switch, wherein the position signal detection circuit is the automatic transfer switch position signal detection circuit according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020494222.4U CN211529816U (en) | 2020-04-08 | 2020-04-08 | Automatic change-over switch position signal detection circuit and automatic change-over switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020494222.4U CN211529816U (en) | 2020-04-08 | 2020-04-08 | Automatic change-over switch position signal detection circuit and automatic change-over switch |
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| CN211529816U true CN211529816U (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020494222.4U Active CN211529816U (en) | 2020-04-08 | 2020-04-08 | Automatic change-over switch position signal detection circuit and automatic change-over switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075514A (en) * | 2021-04-02 | 2021-07-06 | 新风光电子科技股份有限公司 | Interpolar withstand voltage test circuit of automatic discharge thin-film capacitor |
-
2020
- 2020-04-08 CN CN202020494222.4U patent/CN211529816U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075514A (en) * | 2021-04-02 | 2021-07-06 | 新风光电子科技股份有限公司 | Interpolar withstand voltage test circuit of automatic discharge thin-film capacitor |
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