CN109490762B - Method and device for detecting mirror contact of contactor - Google Patents
Method and device for detecting mirror contact of contactor Download PDFInfo
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- CN109490762B CN109490762B CN201710819669.7A CN201710819669A CN109490762B CN 109490762 B CN109490762 B CN 109490762B CN 201710819669 A CN201710819669 A CN 201710819669A CN 109490762 B CN109490762 B CN 109490762B
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- 238000001514 detection method Methods 0.000 claims abstract description 82
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000012360 testing method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
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- 230000001066 destructive effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 235000012907 honey Nutrition 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The device for detecting the mirror contact of the contactor comprises a driving device for driving a moving part of the contactor to move, and a detection power supply which is respectively connected with a main contact and an auxiliary contact of the contactor to form a main contact detection loop and an auxiliary contact detection loop, a signal indicating device for respectively displaying a closing and breaking signal of the main contact and the auxiliary contact, and a metering element for measuring the moving stroke of the moving part, wherein the signal indicating device comprises a main contact signal indicating device arranged in the main contact detection loop and used for indicating the contact closing of the main contact, and an auxiliary contact signal indicating device arranged in the auxiliary contact detection loop and used for indicating the contact closing of the auxiliary contact; the measuring element is connected with the moving part to measure the moving distance of the moving part, the main contact of the contactor comprises at least one group of moving contact and fixed contact which are oppositely arranged, the auxiliary contact comprises an auxiliary moving contact and an auxiliary fixed contact, and the moving contact and the auxiliary moving contact are arranged on the moving part. The invention also provides a method for detecting the mirror contact of the contactor.
Description
Technical Field
The invention relates to the field of detection of piezoelectric devices, in particular to a method and a device for detecting mirror contacts of a contactor.
Background
With the development of industrial control technology, in a motor control circuit, a contactor state is reliably detected through a mirror contact, so that the application of the motor control circuit as a safety guarantee measure is wider and wider, and more users need auxiliary contacts of the contactor to meet the requirements of the mirror contact.
According to GB/T14048.4-2010 annex F:
mirror contacts are defined as: "breaking auxiliary contact which can not be in a closed position simultaneously with the main contact under the condition specified by F.7";
Detection test for mirror contacts: chapter 9 applies and complements the following requirements. The test should be carried out according to F.7.2 and F.7.3 ";
the test requirements of f.7.2 include:
"should be tested on new products under clean conditions. The test steps are as follows:
a) To simulate fusion welding of a main electrode, a main contact should be held in a closed position, each contact being joined together, for example by welding or gluing (for double break contacts, two contacts may be welded together, for example). The thickness of the weld or paste should not change significantly the distance between the contacts and the method used should be described in the test report.
B1 When the coil is not in live operation, an impact test voltage should be applied across the mirror contact at sea level of 2.5kV (corrected according to table f.1 below, table f.1 calculated according to table 12 of GB 14048.1-2006). There should be no destructive discharge.
B2 As an alternative to b 1), the air gap between the contacts should be measured by a direct method when the coil is not operating live; the air gap should be greater than 0.5mm. If there are two or more contact air gaps, the sum of the contact air gaps should be greater than 0.5mm. "
According to the detection recommendation method of GB/T14048.4-2010, contacts are connected together in a welding or pasting mode on a new product, and damage to the contacts of the product is unavoidable, so that the product cannot be used normally any more, and resource waste is caused; meanwhile, when the method is operated according to the alternative method of b2, because the product contacts are all positioned in the product, parts or structures for realizing functions such as arc extinction and insulation exist around the contacts, the operation of directly measuring the air gap between the contacts by most products is difficult; in addition, for the required contact air gap being larger than 0.5mm, if the size of individual parts of the product fluctuates, the size of the air gap can be influenced, and a direct measurement method cannot be used for efficiently monitoring whether the batch product meets the requirement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method and a device for detecting mirror-image contacts of a contactor, which are convenient and quick to detect, accurate in detection result and simple in structure.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The device for detecting the mirror contact of the contactor comprises a driving device 1 for driving a moving part 2 of the contactor to move, a detection power supply which is respectively connected with a main contact and an auxiliary contact of the contactor to form a main contact detection loop and an auxiliary contact detection loop, a signal indicating device 5 for respectively displaying a closing and breaking signal of the main contact and the auxiliary contact, and a metering element for measuring the moving stroke of the moving part 2, wherein the signal indicating device 5 comprises a main contact signal indicating device 51 which is arranged in the main contact detection loop and is used for indicating the contact closing of the main contact, and an auxiliary contact signal indicating device 52 which is arranged in the auxiliary contact detection loop and is used for assisting the contact closing of the contact; the measuring element is connected with the moving part 2 to measure the moving distance of the moving part 2, the main contact of the contactor comprises at least one group of moving contact 31 and fixed contact 41 which are oppositely arranged, the auxiliary contact comprises an auxiliary moving contact 32 and an auxiliary fixed contact 42, and the moving contact 31 and the auxiliary moving contact 32 are arranged on the moving part 2.
Further, the device further comprises a control unit, wherein the control unit is connected with the metering element, the control unit is connected with the main contact detection loop and the auxiliary contact detection loop, the control unit obtains a first distance value a through the metering element according to signals of the auxiliary contact detection loop, the control unit obtains a second distance value b through the metering element according to signals of the main contact detection loop, the control unit judges time sequences of the signals of the auxiliary contact detection loop and the signals of the main contact detection loop, calculates a difference value between the second distance value b and the first distance value a, and outputs a detection result.
Further, a positioning device for fixing the contactor is also included.
Further, the driving device 1 is electrically driven or manually driven.
Further, the driving device 1 comprises a connector connected with a connecting piece 21 of the moving part 2 of the contactor, which extends out of the top of the contactor shell, a transmission threaded rod connected with the connector, and a motor connected with the transmission threaded rod.
Further, the signal indicating device is a signal lamp.
Further, the metering element is a dial indicator.
Further, the main contact of the contactor includes a plurality of groups of moving contacts 31 and fixed contacts 41 which are oppositely arranged, the plurality of groups of moving contacts 31 and fixed contacts 41 are connected in parallel and then connected in series with a main contact signal indicating device 51, and the auxiliary contact is connected in parallel with an auxiliary contact signal indicating device 52.
Further, the driving device 1 is positioned right above the moving part 2; the moving contact 31 is located above the fixed contact 41, and the auxiliary moving contact 32 is located below the auxiliary fixed contact 42.
The method for detecting the mirror contact of the contactor by adopting the device for detecting the mirror contact of the contactor comprises the following steps:
Step one: the method comprises the steps of connecting a moving contact 31 and a fixed contact 41 of a main contact of a contactor with a detection power supply to form a main contact detection loop, and connecting an auxiliary moving contact 32 and an auxiliary fixed contact 42 of an auxiliary contact with the detection power supply to form an auxiliary contact detection loop;
Step two: the measuring element starts to measure, the driving device 1 drives the moving part 2 to act, when the auxiliary contact signal indicating device 52 indicates that the auxiliary moving contact 32 and the auxiliary fixed contact 42 are disconnected, a first distance value a is recorded, the moving part 2 continues to act, and when the main contact signal indicating device 51 indicates that any group of moving contact 31 and fixed contact 41 are closed, a second distance value b is recorded;
Step three: and calculating the difference value between the second distance value b and the first distance value a.
Further, the auxiliary contact signal indicating device 52 indicates that the auxiliary contact is disconnected firstly, the main contact signal indicating device 51 indicates that the main contact is closed later, and when the difference value between the calculated second distance value b and the first distance value a is larger than a threshold value, the product is qualified; otherwise, the product is unqualified.
According to the invention, the driving device drives the driving device to drive the moving part to simulate the working state of the contactor, the signal indicating device is used for indicating the on-off state of the main contact and the auxiliary contact, the metering element measures and obtains the electric gap of the main contact according to the indication of the signal indicating device, the signal indicating device and the metering element are mutually matched, the mirror image contact can be detected, the detection method is simple, and the detection is accurate. The signal indication device is a signal lamp. The metering element is a dial indicator. The invention also provides a method for detecting the mirror contact of the contactor
Drawings
FIG. 1 is a schematic diagram of an apparatus for inspecting a contactor mirror contact in accordance with the present invention;
FIG. 2 is a schematic view of the structure of the contactor to be inspected according to the present invention;
FIG. 3 is a circuit diagram of the main contact loop of the present invention;
FIG. 4 is a circuit diagram of an auxiliary contact circuit of the present invention;
fig. 5 is a flow chart of the present invention for detecting mirrored contacts.
Detailed Description
Embodiments of the method and apparatus for detecting a mirrored contact of a contactor according to the present invention are further described below with reference to the examples shown in figures 1 to 5. The method and apparatus of the present invention for detecting a contactor mirror contact is not limited to the description of the embodiments below.
As shown in fig. 1-5, the device for detecting mirror contact of contactor of the present invention comprises a driving device 1 for driving a moving part 2 of the contactor to move, a detection power supply respectively connected with a main contact and an auxiliary contact of the contactor to form a main contact detection loop and an auxiliary contact detection loop, a signal indicating device 5 for respectively displaying a closing breaking signal of the main contact and the auxiliary contact, and a metering element for measuring a moving stroke of the moving part 2, wherein the signal indicating device 5 comprises a main contact signal indicating device 51 arranged in the main contact detection loop and used for indicating the contact closing of the main contact, and an auxiliary contact signal indicating device 52 arranged in the auxiliary contact detection loop and used for assisting the contact closing of the contact; the measuring element is connected with the moving part 2 to measure the moving distance of the moving part 2, the main contact of the contactor comprises at least one group of moving contact 31 and fixed contact 41 which are oppositely arranged, the auxiliary contact comprises an auxiliary moving contact 32 and an auxiliary fixed contact 42, and the moving contact 31 and the auxiliary moving contact 32 are arranged on the moving part 2. According to the invention, the driving device drives the driving device to drive the moving part to simulate the working state of the contactor, the signal indicating device is used for indicating the closed and open states of the main contact and the auxiliary contact, the electric gap of the main contact is obtained by measuring the measuring element according to the indication of the signal indicating device, the signal indicating device and the measuring element are mutually matched, the mirror image contact can be detected, and the detection method is simple and accurate.
The invention relates to a detection method for detecting a mirror contact of a contactor, which comprises the following steps:
Step one: the method comprises the steps of connecting a moving contact 31 and a fixed contact 41 of a main contact of a contactor with a detection power supply to form a main contact detection loop, and connecting an auxiliary moving contact 32 and an auxiliary fixed contact 42 of an auxiliary contact with the detection power supply to form an auxiliary contact detection loop;
Step two: the measuring element starts to measure, the driving device 1 drives the moving part 2 to act, when the auxiliary contact signal indicating device 52 indicates that the auxiliary moving contact 32 and the auxiliary fixed contact 42 are disconnected, a first distance value a is recorded, the moving part 2 continues to act, and when the main contact signal indicating device 51 indicates that any group of moving contact 31 and fixed contact 41 are closed, a second distance value b is recorded;
Step three: and calculating the difference value between the second distance value b and the first distance value a. The auxiliary contact signal indicating device 52 indicates that the auxiliary contact is disconnected firstly, the main contact signal indicating device 51 indicates that the main contact is closed later, and when the difference value (main contact electric gap) between the second distance value b and the first distance value a is calculated to be larger than a threshold value of 0.5mm, the product is qualified; otherwise, the product is unqualified.
The invention indicates the closing and breaking state of the main contact and the auxiliary contact through the signal indicating device, and the electric gap is calculated by measuring the travel of the moving part through the metering element when the signal indicating device indicates, so that the detection method is simple and accurate. The measuring element can be directly connected with the moving part 2 to measure the moving stroke thereof, or can be connected with the driving device 1 to indirectly measure the stroke of the moving part 2.
The invention also includes a positioning device for securing the contactor. The driving device 1 is driven electrically or manually. The difference between the first distance value a and the second distance value b, the indication sequence of the auxiliary contact signal indication device 52 and the main contact signal indication device 51, and also can be determined manually or by using other logic arithmetic units.
As shown in fig. 1-4, the contactor is provided with a three-phase main contact and a one-phase breaking auxiliary contact, the main contact consists of a moving contact 31 and a fixed contact 41, the auxiliary contact consists of an auxiliary moving contact 32 and an auxiliary fixed contact 42, the moving contact 31 and the auxiliary moving contact 32 are arranged on a moving part of a contact bridge, namely a contact support 2, the fixed contact 41 and the auxiliary fixed contact 42 are arranged on a contactor shell, the contact support 2 can move under the action of an external driving device 1, the moving contact 31 of the main contact is driven to approach and close to the fixed contact 41, and the auxiliary moving contact 32 of the auxiliary contact is driven to be far away from the auxiliary fixed contact 42 and is opened; the main contact and the auxiliary contact of the contactor are respectively coupled in the illustrated signal circuit: the three-phase main contacts are connected in parallel and then connected in series with a main contact signal indicating device 51, the group moving contact 31 and the fixed contact 41 are connected in parallel and then connected in series with the main contact signal indicating device 51, and the auxiliary contacts are connected in parallel with an auxiliary contact signal indicating device 52. Of course, the auxiliary contact can be self-contained or externally added.
As shown in fig. 1, in particular, the driving device 1 is located directly above the moving part 2; the moving contact 31 is located above the fixed contact 41, and the auxiliary moving contact 32 is located below the auxiliary fixed contact 42. The signal indicating device is a signal lamp, and can also be other devices with similar signal indicating functions, such as a meter, a honey device and the like. The metering element is a dial indicator, and a device with logic operation and measurement functions and a combination module, such as a sensor, can also be adopted.
The driving device 1 is driven electrically or manually. The invention provides in particular an embodiment in which the driving device 1 comprises a connection head connected to a connection piece 21 of the moving part 2 of the contactor, which extends out of the top of the contactor casing, a transmission threaded rod connected to the connection head, and a motor connected to the transmission threaded rod. Of course, the transmission threaded rod can also be connected with a hand-operated disc, and the hand-operated disc drives the threaded rod to rotate so as to drive the moving part 2 to move. During detection, the contactor does not need to be opened, and the connector of the driving device 1 is connected with the connecting piece 21 of the moving part 2 extending out of the top of the contactor shell to directly drive the moving part 2 (namely, the contact support of the contactor). Furthermore, the metering element can be connected to the connection 21 of the moving part 2 for a travel measurement.
When the driving device 1 is driven manually, in an initial state, the auxiliary moving contact 32 and the auxiliary fixed contact 42 are closed, the manual driving moving part 2 acts, and when the indicator light 52 indicates that the auxiliary moving contact 32 and the auxiliary fixed contact 42 are disconnected, the moving part 2 is suspended, and a first distance value a is read from the dial indicator; when the moving member 2 continues to be driven and the indicator lamp 51 indicates that any one of the group of the moving contact 31 and the fixed contact 41 is closed, the moving member 2 is suspended, and the second distance value b is read from the dial indicator.
When the driving device 1 is automatically driven, the invention provides a preferred embodiment of a device for detecting mirror contact of a contactor, which comprises a control unit, wherein the control unit is connected with a metering element, the control unit is connected with a main contact detection loop and an auxiliary contact detection loop, the control unit acquires a first distance value a through the metering element according to signals of the auxiliary contact detection loop, the control unit acquires a second distance value b through the metering element according to signals of the main contact detection loop, the control unit judges time sequences of the signals of the auxiliary contact detection loop and the signals of the main contact detection loop, calculates a difference value between the second distance value b and the first distance value a, and outputs a detection result. The main contact detection loop and the auxiliary contact detection loop are connected with the control unit to input indication signals, the auxiliary moving contact 32 and the auxiliary fixed contact 42 are closed in an initial state, the control unit starts the motor to drive the moving part 2 to act, and when the auxiliary contact signal indication device 52 indicates that the auxiliary moving contact 32 and the auxiliary fixed contact 42 are disconnected, the control unit reads a first distance value a from the dial indicator; when the main contact signal indicating device 51 indicates that any group of the movable contact 31 and the fixed contact 41 are closed, the control unit reads a second distance value b from the dial indicator, the control unit receives a signal which is disconnected by the auxiliary contact signal indicating device 52 and is earlier than a closing signal of the main contact signal indicating device 51, and when the difference value between the second distance value b and the first distance value a is larger than a threshold value by 0.5mm, the product is qualified; otherwise, the product is unqualified.
The device for detecting the mirror contact of the contactor also comprises a mounting frame, a positioning device for fixing the contactor is arranged on a station table of the mounting frame, the positioning device comprises a fixed plate and a movable plate, the movable plate is matched with the fixed plate through a sliding rail on the station table to hold the contactor, and the movable plate is connected with an elastic piece or connected with a holding cylinder. The upper part of the positioning device is provided with a driving device 1 and a metering element connected with the driving device 1, the driving device 1 comprises a connector connected with a moving part 2 of the contactor, a transmission threaded rod connected with the connector, and a motor connected with the transmission threaded rod, and the metering element is connected with the transmission threaded rod. The side of the workbench is provided with a control panel, the control panel is provided with a starting button, an indicator lamp of the signal indicating device 5 and a detection lamp for indicating the detection result, and the workbench is internally provided with a detection power supply and a control unit. The control unit is connected with the metering element to acquire a measured value; the control unit is connected with a motor of the driving device 1 to control the driving device 1 to drive the moving part to act; the control unit is connected with the main contact detection loop and the auxiliary contact detection loop to acquire signals of main contact closing and auxiliary contact breaking, and can acquire signals through a main contact signal indicating device 51 and an auxiliary contact signal indicating device 52 which are connected in the main contact detection loop and the auxiliary contact detection loop; the control unit is connected with a detection lamp for indicating the detection result and is used for indicating the test result. The main contact detection circuit is provided with a wiring terminal connected with the moving contact 31 and the fixed contact 41 of the main contact, and the auxiliary contact detection circuit is provided with a wiring terminal connected with the auxiliary moving contact 32 and the auxiliary fixed contact 42. Of course, the control panel may be provided with operation keys such as a start button and a stop button.
The following describes the detection process for detecting the contactor mirror contacts with reference to fig. 1-5:
In the initial state, the auxiliary contact moving contact 32 and the auxiliary fixed contact 42 are in a closed state, when the driving device pushes the contactor moving part contact support 2 to move, the moving contact 31 and the auxiliary moving contact 32 are driven to move, after the auxiliary moving contact 32 and the auxiliary fixed contact 42 are separated from each other after the positioning movement is carried out, a signal is displayed by the instantaneous signal indicating device 52 for indicating that the auxiliary contact is separated, and at the moment, a stroke value a can be read by the metering element dial indicator; the driving device continues to move, after the driving device moves for a positioning movement, any one of the three main contacts 31 and the fixed contact 41 are closed, the main contact signal indicating device 51 displays a signal indicating that the main contact is closed, and at the moment, the metering element dial indicator can read another stroke value b.
The signal display time sequence of the two signal indicating devices 51 and 52 is displayed in preference to 51, and the read two stroke values a and b meet the requirement that b-a is more than 0.5mm, so that the auxiliary contact can be judged to meet the requirement of the mirror contact test F.7.2 in the GB/T14048.4 annex F.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (9)
1. An apparatus for detecting a mirrored contact of a contactor, comprising:
the device comprises a driving device (1) for driving a moving part (2) of the contactor to move, a detection power supply which is respectively connected with a main contact and an auxiliary contact of the contactor to form a main contact detection loop and an auxiliary contact detection loop, a signal indicating device (5) for respectively displaying a closing and breaking signal of the main contact and the auxiliary contact, and a metering element for measuring the moving stroke of the moving part (2), wherein the signal indicating device (5) comprises a main contact signal indicating device (51) which is arranged in the main contact detection loop and is used for indicating the contact closing of the main contact, and an auxiliary contact signal indicating device (52) which is arranged in the auxiliary contact detection loop and is used for assisting the contact closing of the auxiliary contact;
The measuring element is connected with the moving part (2) to measure the moving distance of the moving part (2), the main contact of the contactor comprises at least one group of moving contact (31) and fixed contact (41) which are oppositely arranged, the auxiliary contact comprises an auxiliary moving contact (32) and an auxiliary fixed contact (42), and the moving contact (31) and the auxiliary moving contact (32) are arranged on the moving part (2);
The control unit is connected with the metering element, the control unit is connected with the main contact detection loop and the auxiliary contact detection loop, the control unit obtains a first distance value a through the metering element according to signals of the auxiliary contact detection loop, the control unit obtains a second distance value b through the metering element according to signals of the main contact detection loop, the control unit judges time sequences of the signals of the auxiliary contact detection loop and the signals of the main contact detection loop, calculates a difference value between the second distance value b and the first distance value a, and outputs a detection result.
2. The apparatus for detecting a contactor mirror contact according to claim 1, wherein: also included is a positioning device for securing the contactor.
3. The apparatus for detecting a contactor mirror contact according to claim 1, wherein: the driving device (1) is driven electrically or manually.
4. The apparatus for detecting a contactor mirror contact according to claim 1, wherein: the driving device (1) comprises a connector connected with a connecting piece (21) of the moving part (2) of the contactor, which extends out of the top of the shell of the contactor, a transmission threaded rod connected with the connector, and a motor connected with the transmission threaded rod.
5. The apparatus for detecting a contactor mirror contact according to claim 1, wherein: the signal indication device is a signal lamp; the metering element is a dial indicator.
6. The apparatus for detecting a contactor mirror contact according to claim 1, wherein: the main contact of the contactor comprises a plurality of groups of moving contacts (31) and fixed contacts (41) which are oppositely arranged, the plurality of groups of moving contacts (31) and the fixed contacts (41) are connected in parallel and then connected in series with a main contact signal indicating device (51), and the auxiliary contact is connected in parallel with an auxiliary contact signal indicating device (52).
7. The apparatus for detecting a contactor mirror contact according to claim 1, wherein: the driving device (1) is positioned right above the moving part (2); the moving contact (31) is positioned above the fixed contact (41), and the auxiliary moving contact (32) is positioned below the auxiliary fixed contact (42).
8. A method for detecting a contactor mirror contact by adopting a device for detecting the contactor mirror contact,
The method is characterized in that: the device for detecting the mirror contact of the contactor comprises a driving device (1) for driving a moving part (2) of the contactor to move, a detection power supply which is respectively connected with a main contact and an auxiliary contact of the contactor to form a main contact detection loop and an auxiliary contact detection loop, a signal indicating device (5) for respectively displaying a closing and breaking signal of the main contact and the auxiliary contact, and a metering element for measuring the moving stroke of the moving part (2), wherein the signal indicating device (5) comprises a main contact signal indicating device (51) which is arranged in the main contact detection loop and is used for indicating the contact closing of the main contact, and an auxiliary contact signal indicating device (52) which is arranged in the auxiliary contact detection loop and is used for indicating the contact closing of the auxiliary contact;
The measuring element is connected with the moving part (2) to measure the moving distance of the moving part (2), the main contact of the contactor comprises at least one group of moving contact (31) and fixed contact (41) which are oppositely arranged, the auxiliary contact comprises an auxiliary moving contact (32) and an auxiliary fixed contact (42), and the moving contact (31) and the auxiliary moving contact (32) are arranged on the moving part (2);
the method for detecting the mirror contact of the contactor comprises the following steps:
Step one: a moving contact (31) and a fixed contact (41) of a main contact of the contactor are connected with a detection power supply to form a main contact detection loop, and an auxiliary moving contact (32) and an auxiliary fixed contact (42) of an auxiliary contact are connected with the detection power supply to form an auxiliary contact detection loop;
Step two: the measuring element starts to measure, the driving device (1) drives the moving part (2) to act, the auxiliary contact signal indicating device (52) indicates that the auxiliary moving contact (32) and the auxiliary fixed contact (42) are disconnected, a first distance value a is recorded, the moving part (2) continues to act, and the main contact signal indicating device (51) indicates that any group of moving contact (31) and fixed contact (41) are closed, and a second distance value b is recorded;
Step three: and calculating the difference value between the second distance value b and the first distance value a.
9. The method of detecting a contactor mirror contact according to claim 8, wherein: the auxiliary contact signal indicating device (52) indicates the auxiliary contact to break firstly, the main contact signal indicating device (51) indicates the main contact to close later, and when the difference value between the calculated second distance value b and the first distance value a is larger than a threshold value, the product is qualified; otherwise, the product is unqualified.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710819669.7A CN109490762B (en) | 2017-09-12 | 2017-09-12 | Method and device for detecting mirror contact of contactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710819669.7A CN109490762B (en) | 2017-09-12 | 2017-09-12 | Method and device for detecting mirror contact of contactor |
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| CN109490762A CN109490762A (en) | 2019-03-19 |
| CN109490762B true CN109490762B (en) | 2024-05-14 |
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| CN109490762A (en) | 2019-03-19 |
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