CN202693688U - Three-phase phase lack detection circuit of electric actuator - Google Patents
Three-phase phase lack detection circuit of electric actuator Download PDFInfo
- Publication number
- CN202693688U CN202693688U CN 201220164734 CN201220164734U CN202693688U CN 202693688 U CN202693688 U CN 202693688U CN 201220164734 CN201220164734 CN 201220164734 CN 201220164734 U CN201220164734 U CN 201220164734U CN 202693688 U CN202693688 U CN 202693688U
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- Prior art keywords
- phase
- circuit
- detection circuit
- electric actuator
- phase voltage
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- Expired - Fee Related
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Abstract
The utility model discloses a three-phase phase lack detection circuit of an electric actuator. The three-phase phase lack detection circuit of an electric actuator comprises a three-phase input circuit, a U-V phase voltage detection circuit, a U-W phase voltage detection circuit, photoelectric isolated circuits and an AD detection circuit. The U-V phase voltage detection circuit and the U-W phase voltage detection circuit are respectively connected with a photoelectric isolated circuit and then connected in parallel; the input terminal of the parallel circuit is connected with a three-phase input circuit; and the output terminal of the parallel circuit is connected with an AD detection circuit. According to the three-phase phase lack detection circuit of an electric actuator employing the technology scheme, the threshold of a phase voltage can be accurately set, phase lack can be timely detected, thereby the motor of the electric actuator is protected, the valve of the electric actuator is guaranteed to work normally, the service life of the electric actuator is prolonged, the circuit is simple, cost is low, and popularization is convenient.
Description
Technical field
The utility model relates to a kind of electric actuator, relates in particular to a kind of for detection of the electric actuator three-phase voltage three-phase lack phase testing circuit of the electric actuator of phase shortage whether.
Background technology
The three-phase lack phase testing circuit of present existing electric actuator can not be real can accomplish Measurement accuracy, only have when a certain when not having electricity mutually in the three-phase, just can measure phase shortage.This situation is fewer at the scene, owing to there is multiple power sources equipment to coexist when using in the circuit, even wherein a disconnected phase time is mutually arranged, but might this exist mutually empty electricly, often at this moment just can not accurately measure power phase shortage.
Summary of the invention
Goal of the invention: the purpose of this utility model is for the deficiencies in the prior art, and a kind of threshold value that can accurately set phase voltage is provided, and in time detects phase shortage, thus the three-phase lack phase testing circuit of the electric actuator of protection electric actuator motor.
Technical scheme: in order to realize the foregoing invention purpose, the technical scheme that the utility model adopts is:
A kind of three-phase lack phase testing circuit of electric actuator, comprise three-phase input circuit, U-V phase voltage detection circuit, U-W phase voltage detection circuit, photoelectric isolating circuit and AD testing circuit, described U-V phase voltage detection circuit and U-W phase voltage detection circuit are connected with respectively behind the photoelectric isolating circuit in parallel, input end at this parallel circuit is connected with the three-phase input circuit, and the output terminal of this parallel circuit is connected with the AD testing circuit.
Three-phase input circuit input three-phase voltage, U-V phase voltage detection circuit and U-W phase voltage detection circuit are directly passed to the AD testing circuit to the voltage signal in the three-phase with its voltage signal by the linear photoelectric isolation circuit, the AD testing circuit can accurately be measured the phase voltage value in the three-phase, can the Measurement accuracy phase shortage by the threshold value of setting phase voltage.
Beneficial effect: the utility model compared with prior art, its beneficial effect is:
The utility model is not affected by the power-supply device of same circuit, can accurately detect whether phase shortage of three-phase voltage, effectively protect the motor of electric actuator, make it avoid phase shortage and damage, guaranteed the valve normal operation of electric actuator, the serviceable life of having improved electric actuator; This circuit is simple, and cost is low to be convenient to promote the use of.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with accompanying drawing, by a most preferred embodiment, technical solutions of the utility model are elaborated, but protection domain of the present utility model is not limited to described embodiment.
As shown in Figure 1, a kind of three-phase lack phase testing circuit of electric actuator, comprise three-phase input circuit 1, U-V phase voltage detection circuit 2, U-W phase voltage detection circuit 3, photoelectric isolating circuit 4 and AD testing circuit 5, described U-V phase voltage detection circuit 2 and U-W phase voltage detection circuit 3 are connected with respectively photoelectric isolating circuit 4 rear parallel connections, input end at this parallel circuit is connected with three-phase input circuit 1, and the output terminal of this parallel circuit is connected with AD testing circuit 5.
Claims (1)
1. the three-phase lack phase testing circuit of an electric actuator, it is characterized in that: comprise three-phase input circuit, U-V phase voltage detection circuit, U-W phase voltage detection circuit, photoelectric isolating circuit and AD testing circuit, described U-V phase voltage detection circuit and U-W phase voltage detection circuit are connected with respectively behind the photoelectric isolating circuit in parallel, input end at this parallel circuit is connected with the three-phase input circuit, and the output terminal of this parallel circuit is connected with the AD testing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220164734 CN202693688U (en) | 2012-04-17 | 2012-04-17 | Three-phase phase lack detection circuit of electric actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220164734 CN202693688U (en) | 2012-04-17 | 2012-04-17 | Three-phase phase lack detection circuit of electric actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202693688U true CN202693688U (en) | 2013-01-23 |
Family
ID=47549289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220164734 Expired - Fee Related CN202693688U (en) | 2012-04-17 | 2012-04-17 | Three-phase phase lack detection circuit of electric actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202693688U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645995A (en) * | 2016-09-23 | 2017-05-10 | 上海新时达电气股份有限公司 | Three-phase motor open-phase detection method and system |
| US9739840B2 (en) | 2015-02-12 | 2017-08-22 | Tri-Tec Manufacturing, LLC | Power detection system for valve actuators |
-
2012
- 2012-04-17 CN CN 201220164734 patent/CN202693688U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9739840B2 (en) | 2015-02-12 | 2017-08-22 | Tri-Tec Manufacturing, LLC | Power detection system for valve actuators |
| US9995795B2 (en) | 2015-02-12 | 2018-06-12 | Tri-Tec Manufacturing, LLC | Power detection system for valve actuators |
| US10247787B2 (en) | 2015-02-12 | 2019-04-02 | Tri-Tec Manfacturing, LLC | Power detection system for valve actuators |
| US10649039B2 (en) | 2015-02-12 | 2020-05-12 | Tri-Tec Manufacturing, LLC | Power detection system for valve actuators |
| CN106645995A (en) * | 2016-09-23 | 2017-05-10 | 上海新时达电气股份有限公司 | Three-phase motor open-phase detection method and system |
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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: 20130123 Termination date: 20170417 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |