CN118610049B - Circuit breaker electric operating device and working method thereof - Google Patents

Abstract

The present invention belongs to the technical field of circuit breakers, and specifically relates to a circuit breaker electric operating device and a working method thereof. The circuit breaker electric operating device and the working method thereof of the present invention can correct the opening and closing delay time according to multiple data of the block rotation, and can overcome the technical problem of inaccurate stop position of the block caused by voltage, machinery, circuit breaker model and the like; the circuit breaker electric operating device and the working method thereof of the present invention have an adaptive function, and can obtain an accurate opening and closing delay time after receiving the opening and closing delay time acquisition instruction before leaving the factory or during work, and have strong applicability; in addition, considering that the three-position state circuit breaker needs to be able to successfully indicate the tripping state, the closing free tripping area and the opening free tripping area are defined in the block rotation area, and by limiting the delay coefficient, the block can be accurately delayed to stop in the closing free tripping area or the opening free tripping area.

Description

Circuit breaker electric operating device and working method thereof

Technical Field

The invention belongs to the technical field of circuit breakers, and in particular relates to an electric operating device of a circuit breaker and a working method thereof.

Background Art

The electric operating device is one of the commonly used accessories of molded case circuit breakers. When used with the circuit breaker, it can electrically close and open the circuit breaker from a distance to achieve centralized and automatic control of the transmission and distribution network.

Low-voltage molded case circuit breakers have three positions: open, closed, and tripped. The traditional molded case circuit breaker electric operating mechanism can only indicate the two states of open and closed, and cannot accurately indicate the three-position state of the circuit breaker. Since the electric operating mechanism cannot truly reflect the circuit breaker state, the electric operating controller cannot correctly collect the circuit breaker state. The electric operating controller uploads the inaccurate state to the smart distribution system, resulting in mismatched information on the system side. The traditional two-position indication can no longer meet the needs of the development of smart grids.

Summary of the invention

The object of the present invention is to provide a circuit breaker electric operating device and a working method thereof.

In a first aspect, the present invention provides a method for obtaining a switching delay of an electric operating device of a circuit breaker, comprising:

Obtain the time Ti taken _for the slider to drive the rotating shaft to rotate through a complete circle for the i-th time, and the time T 1 _i , T 2 _i , T 3 _i , T 4 _i taken for the block to pass through the closing area, closing tripping area, opening area, and opening tripping area in this circle, and T 1 _i + T 2 _i + T 3 _i + T 4 _i = Ti _;

Obtain the i -th closing delay calculation time D 1 _i = αT 1 _i , and obtain the i -th opening delay calculation time D 3 _i = βT 3 _i ;

The closing delay time D 1 is obtained according to D 1 ₁ ~ D 1 _i , and the opening delay time D 3 is obtained according to D 3 ₁ ~ D 3 _i .

In an embodiment of the present application, the value range of α is 0-1, and the value range of β is 0-1.

In one embodiment of the present application, the calculation method of α is:

Calculate the angle of the closing area on the circumference: θ 1 = T 1 _i / T _i × 360°;

When the closing free tripping area θ 1 ≥ θa , then 1- θa / θ 1 ≤ α ≤1;

When the closing free tripping area θ1 ＜ θa , the value range of α is 0～1.

In one embodiment of the present application, the calculation method of β is:

Calculate the angle of the opening area on the circumference: θ 3 = T 3 _i / T _i × 360°;

When the opening free tripping area θ 3 ≥ θb , then 1- θb / θ 3 ≤ β ≤1;

When the opening free tripping area θ3 ＜ θb , the value range of β is 0～1.

In one embodiment of the present application, the method for obtaining the closing delay time D 1 according to D 1 ₁ to D 1 _i includes: removing the maximum value and the minimum value among D 1 ₁ to D 1 _i and taking the average value as the value of D 1;

The method for obtaining the opening delay time D3 according to D31 _- D3i _comprises : removing the maximum value and the minimum _value among D31 _- D3i and taking the average value as the value of D3 .

In a second aspect, accordingly, the present invention provides a working method of a circuit breaker electric operating device, comprising:

Receive the instruction to obtain the opening and closing delay time;

The closing delay time D1 and the opening delay time D3 are obtained by using the above-mentioned method for obtaining the closing and opening delay of the circuit breaker electric operating device;

When the closing command is obtained, the control slider drives the shaft to stop rotating after a delay of D 1 after the block enters the closing area;

When the opening command is obtained, the control slider drives the shaft to stop rotating after a delay of D 3 after the block enters the opening area.

In a third aspect, accordingly, the present invention provides a circuit breaker electric operating device, comprising:

A slider, mounted on the slide rail, used to connect with the handle of the circuit breaker;

The slider drives the rotating shaft, on which a cam is arranged, and the cam is connected to the slider through a stopper;

A motor is used to drive the slider to drive the rotating shaft to rotate, the slider driving the rotating shaft drives the cam to rotate, and the cam drives the slider to slide on the slide rail through the stopper to drive the handle of the circuit breaker;

A closing position sensor, an opening position sensor and a controller, wherein the motor, the closing position sensor and the opening position sensor are all electrically connected to the controller;

The closing position sensor is used to obtain the signal of the block entering and exiting the closing area, and the opening position sensor is used to obtain the signal of the block entering and exiting the opening area;

The controller uses the working method of the circuit breaker electric operating device as described above to control the rotation of the motor.

The beneficial effects of the present invention are:

The circuit breaker electric operating device and the working method thereof of the present invention can correct the opening and closing delay time according to multiple data of the block rotation, and can overcome the technical problem of inaccurate stop position of the block caused by voltage, machinery, circuit breaker model and the like; the circuit breaker electric operating device and the working method thereof of the present invention have an adaptive function, and can obtain accurate opening and closing delay time after receiving the opening and closing delay time acquisition instruction before leaving the factory or during work, and have strong applicability; in addition, considering that the three-position state circuit breaker needs to be able to indicate the tripping position state after tripping, a closing free tripping area and an opening free tripping area are defined in the block rotation area, and by limiting the delay coefficient, the block can be accurately delayed to stop in the closing free tripping area or the opening free tripping area.

Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of a circuit breaker electric operating device according to a preferred embodiment of the present invention;

FIG2 is a schematic diagram of the cooperation between the slider driving shaft and the slider according to an embodiment of the present invention;

FIG3 is a schematic diagram of a slider and a slide rail according to an embodiment of the present invention;

FIG4 is a control principle diagram of a circuit breaker electric operating device according to an embodiment of the present invention;

FIG5 is a schematic diagram of the position divisions through which a stopper passes in one rotation in one embodiment of the present invention;

FIG6 is a schematic diagram of the position divisions through which a stopper rotates once in another embodiment of the present invention;

FIG. 7 is a schematic diagram of a slider according to an embodiment of the present invention.

In the figure:

The slide block 10 , the slide rail 20 , the slide block driving shaft 30 , the cam 40 , the stopper 50 , the motor 60 , the closing position sensor 70 , and the opening position sensor 80 .

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

The present application provides a method for obtaining the opening and closing delay of a circuit breaker electric operating device, a circuit breaker electric operating device and a working method thereof, which are described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , as an optional component of a circuit breaker electric operating device, the circuit breaker electric operating device includes:

The slider 10 is mounted on the slide rail 20 and is used to connect with the handle of the circuit breaker;

The slider drives the rotating shaft 30, on which a cam 40 is arranged, and the cam 40 is connected to the slider 10 through a stopper 50;

The motor 60 is used to drive the slider to drive the rotating shaft 30 to rotate, and the slider driving the rotating shaft 30 drives the cam 40 to rotate, and the cam 40 drives the slider 10 to slide on the slide rail 20 through the stopper 50 to drive the handle of the circuit breaker;

A closing position sensor 70, an opening position sensor 80 and a controller, wherein the motor 60, the closing position sensor 70 and the opening position sensor 80 are all electrically connected to the controller;

The closing position sensor 70 is used to obtain a signal indicating that the block enters or exits a closing area, and the opening position sensor 80 is used to obtain a signal indicating that the block enters or exits an opening area.

Specifically, referring to FIG. 2 , a transverse groove is provided on the back of the slider 10, and a stopper 50 is accommodated in the transverse groove; a receiving groove for accommodating the handle of the circuit breaker is provided on the front of the slider 10; the cooperation between the cam 40, the stopper 50 and the slider 10 can convert the circular motion of the slider driving shaft 30 into the linear motion of the slider 10 on the slide rail 20, thereby driving the handle of the circuit breaker to be in the closing, tripping and opening positions, and realizing electric control.

In this embodiment, referring to FIG. 5 , optionally, taking the clockwise rotation of the block 50 as an example, the path through which the block 50 rotates one circle with the slider driving the rotating shaft 30 can be divided into four areas: closing area 1, closing tripping area 2, opening area 3, and opening tripping area 4; the closing area 1 corresponds to the handle of the circuit breaker being in the closing position, and the opening area 3 corresponds to the handle of the circuit breaker being in the opening position; the closing tripping area 2 is the area where the block 50 is located after the handle of the circuit breaker is tripped from the closing state and driven by the slider 10, and the opening tripping area 4 is the area where the block 50 is located after the handle of the circuit breaker is tripped from the opening state and driven by the slider 10.

Referring to FIG. 4 , in this embodiment, the closing position sensor 70 and the opening position sensor 80 may be triggered by the slider 10 ; as an optional matching mode of the closing position sensor 70 , the opening position sensor 80 , the controller and the motor 60 :

Use a controller using an MCU microcontroller to control the entire electric operating mechanism and set the minimum timing unit (e.g. 1 ms );

The output signal of the closing position sensor is connected to an input pin ( Ph ) of the MCU ; if the sensor has no trigger signal, the pin is at a high level; if the sensor detects a trigger signal, the pin is at a low level;

The output signal of the opening position sensor is connected to another input pin ( Pf ) of the MCU ; if the sensor has no trigger signal, the pin is at a high level; if the sensor detects a trigger signal, the pin is at a low level;

An output pin ( Pm ) of the MCU is connected to a MOS tube to control the start and stop of the motor. A high level starts and a low level stops. The motor only drives the slider to drive the shaft 30 to rotate clockwise without reversing.

In this embodiment, the position of the slider 10 can be obtained by the closing position sensor 70 and the opening position sensor 80, so that the signal of the block 50 entering and exiting each area during the rotation process can be obtained; taking the block 50 being located in the opening tripping area 4 as the starting position as an example, when the Ph pin is detected to be converted from a high level to a low level, it indicates that the block 50 enters the closing area 1; when the Ph pin is detected to be converted from a low level to a high level, it indicates that the block 50 enters the closing tripping area 2 from the closing area 1; when the Pf pin is detected to be converted from a high level to a low level, it indicates that the block 50 enters the opening area 3 from the closing tripping area 2; when the Pf pin is detected to be converted from a low level to a high level, it indicates that the block 50 enters the opening tripping area 4 from the opening area 3.

Therefore, in order to control the position of the slider 10, after obtaining the closing or opening command, generally after detecting that the block 50 enters the closing area 1 or the opening area 3, the motor allows the block 50 to stay at the preset position in the closing area 1 or the opening area 3 according to the preset delay, thereby controlling the position of the slider 10.

In some application scenarios, some factors such as voltage fluctuations (low voltage, slow motor speed, high voltage, fast motor speed), friction caused by machining discreteness, parts wear, changes in motor output power, mechanical properties of circuit breakers of different brands and models, different handle rotation angles, etc., may cause the motor to stop after the block 50 fails to rotate to the preset position within a fixed delay.

Based on this, the present invention provides a method for obtaining the opening and closing delay of a circuit breaker electric operating device, which can obtain the corrected opening and closing delay time based on the i- cycle historical data of the block rotating with the slider driving the rotating shaft, so that the block 50 can be accurately stopped at the preset position.

Optionally, the method for obtaining the opening and closing delay of the circuit breaker electric operating device includes:

Obtain the time Ti taken _for the slider to drive the rotating shaft to rotate through a complete circle for the i-th time, and the time T 1 _i , T 2 _i , T 3 _i , T 4 _i taken for the block to pass through the closing area, the closing tripping area, the opening area, and the opening tripping area in this circle, and T 1 _i + T 2 _i + T 3 _i + T 4 _i = Ti _;

Obtain the i -th closing delay calculation time D 1 _i = αT 1 _i , and obtain the i -th opening delay calculation time D 3 _i = βT 3 _i ;

The closing delay time D 1 is obtained according to D 1 ₁ ~ D 1 _i , and the opening delay time D 3 is obtained according to D 3 ₁ ~ D 3 _i .

In some application scenarios, the above method may be used to determine the precise closing delay time and opening delay time after the mechanism is assembled in the factory in order to adapt to different brands and models of circuit breaker products; in other application scenarios, the above method may be used to re-update the precise closing delay time and opening delay time after the product leaves the factory and the user uses it at the workstation due to inaccurate positioning caused by mechanical structure wear, ambient temperature changes, etc.

Optionally, in this embodiment, the historical data of i times may be data obtained by the slider driving the rotating shaft to continuously rotate i times during the pre-factory debugging process; or it may be data recorded during the normal operation of the circuit breaker electric operating device after leaving the factory, when the slider driving the rotating shaft rotates i times before the current closing or opening action.

In this embodiment, T _i , T 1 _i , T 2 _i , T 3 _i , and T 4 _i can be obtained by the closing position sensor 70 , the opening position sensor 80 , and the controller; the following takes the starting position of the block 50 in the opening tripping area as an example:

1. Start the motor and wait for the Ph pin to switch from high level to low level. When the Ph pin is detected to switch from high level to low level, the block 50 enters the closing area 1, starts timing, and the motor continues to rotate;

2. Wait for the Ph pin to change from low level to high level. When the Ph pin is detected to change from low level to high level, the time T 1 _i (for example, 120 ms ) of area 1 is obtained, and the block 50 enters the closing tripping area 2 from the closing area 1 to continue timing, and the motor continues to rotate;

3. Wait for the Pf pin to change from high level to low level. When the Pf pin is detected to change from high level to low level, the time T 12 _i of area 1+2 (e.g. 180 ms ) is obtained, and the block 50 enters the opening area 3 from the closing tripping area 2, and the timing continues, and the motor continues to rotate;

4. Wait for the Pf pin to change from low level to high level. When the Pf pin is detected to change from low level to high level, the time T 123 _i of area 1+2+3 (for example, 280 ms ) is obtained, and the block 50 enters the opening tripping area 4 from the opening area 3, and the timing continues, and the motor continues to rotate.

5. Wait for the Ph pin to change from high level to low level. When the Ph pin is detected to change from high level to low level, the timing is ended, and the time Ti (for example, 360 ms ₎ for one rotation is obtained, and the motor stops rotating.

Further, it can be obtained: T _i =360 ms , T 1 _i =120 ms , T 2 _i = T 12 _i - T 1 _i =60 ms , T 3 _i = T 123 _i - T 12 _i =100 ms , T 4 _i = T _i - T 123 _i =80 ms .

Of course, in other embodiments, the starting position of the block 50 may be different. For example, during pre-factory debugging, if the circuit breaker is not at the workstation, the opening tripping area may be used as the starting position of the block 50; after leaving the factory, if the circuit breaker is at the workstation, the starting position of the block 50 may be in the closing area 1, in the opening area 3, or in areas 2 and 4, but Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, _Ti , Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti , Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti, Ti , Ti, Ti, Ti, Ti, Ti _, Ti, Ti, Ti, Ti, Ti _, Ti, _Ti , Ti , Ti , Ti _,

For example, when the circuit breaker is at the workstation, the block 50 cannot rotate continuously for a full circle as in the pre-factory debugging, but receives the opening command and rotates from the closing area 1 to the opening area 3, or receives the closing command and rotates from the opening area 3 to the inner closing area 1. Specifically, when the starting position of the block 50 is in the closing area 1, after receiving the opening command, the time that can be obtained through the signals of the closing position sensor 70 and the opening position sensor 80 is: t1 from the starting position of the block to the side of the closing area 1, t2 when the block passes through area 2, and the delay time D3 of the block in area 3; after receiving the opening command, when the starting position of the block 50 is in the closing area 1, after receiving the opening command, the time that can be obtained through the signals of the closing position sensor 70 and the opening position sensor 80 is: t3 from the starting position of the block to the side of the leaving area 3, t4 when the block passes through area 4, and the delay time D1 of the block in area 1. In this example, T 1 = D 1 + t 1, T 2 = t 2, T 3 = D 3 + t 3, T 4 = t 4, and the time of a complete week is T = T 1 + T 2 + T 3 + T 4.

In this embodiment, α is optionally a closing delay coefficient, and β is an opening delay coefficient. To ensure that the block 50 can stop in the closing area 1 or the opening area 3, the delay coefficient can be 0 to 1. Optionally, α and β can be set according to different types of circuit breakers, or according to some factors such as user experience, and can be, but not limited to, 0.25, 0.5, 0.8, etc.

In this embodiment, in order to make the delay accurate, the closing delay time D1 can be obtained according to D11 ~ _D1i , _{and the} opening delay time D3 _can be obtained according to D31 ~ D3i .

Optionally, D 1 may be an average of D 1 ₁ to D 1 _i , and D 3 may be an average of D 3 ₁ to D 3 _i .

Preferably, the method for obtaining the closing delay time _D1 according to D11 _~ D1i includes: removing the maximum value and the _{minimum value} among D11 ~ D1i and taking the average value as the value of D1 ; the method for obtaining the opening delay time _D3 according to D31 _~ D3i includes : removing the _{maximum value and the minimum value among D31 ~} D3i and taking the average value as the value of D3 .

In some application scenarios, since the closing tripping area 2 is the area where the block 50 is located after the handle of the circuit breaker is tripped from the closing state and driven by the slider 10, and the opening tripping area 4 is the area where the block 50 is located after the handle of the circuit breaker is tripped from the opening state and driven by the slider 10. Therefore, referring to FIG. 7, when the block 50 is at the highest point and the lowest point, the connection line between the block 50 and the slider drive shaft 30 is just in a vertical state, and when the handle of the circuit breaker is tripped, the force applied to the slider 10 is also vertical, resulting in the slider 10 being unable to drive the block 50 into the closing tripping area 2 or the opening tripping area 4 during tripping. Therefore, if the indication of the free tripping position is to be realized, it is required that after the block 50 enters the closing area 1 or the opening area 3, the delayed stop position must at least be located in an area exceeding the vertical position.

Based on this, referring to FIG. 6 , in this embodiment, taking the clockwise rotation of the block 50 as an example, the area divided by the path through which the block 50 rotates with the slider driving the rotating shaft 30 for one circle also includes a closing free tripping area a and an opening free tripping area b .

Generally speaking, the center angles θa and θb of areas a and b are determined by the constraints of the mechanical structure (for example, θa = 30°, θb = 20°), which are generally smaller than the center angles of areas 1 and 3, and areas a and b are located in areas 1 and 3, respectively. The relevant parts of this part are generally precisely processed and installed, and there is no wear, the angles are relatively stable, and can be regarded as quantitative. Of course, in some other application scenarios, the center angles of areas a and b are respectively larger than the center angles of areas 1 and 3, then areas 1 and 3 are both free tripping areas.

Furthermore, in order to ensure that the delay time during the closing and opening process can allow the block 50 to stay at the preset position in the areas a and b , it is necessary to further limit the values of α and β .

In this embodiment, optionally, the calculation method of α is:

Calculate the angle of the closing area on the circumference: θ 1 = T 1 _i / T _i × 360°;

When the closing free tripping area θ1≥θa , then 1- θa / θ1≤α≤1 ;

When the closing free tripping area θ1 ＜ θa , the value range of α is 0～1.

The calculation method of β is:

Calculate the angle of the opening area on the circumference: θ 3 = T 3 _i / T _i × 360°;

When the opening free tripping area θ 3 ≥ θb , then 1- θb / θ 3 ≤ β ≤1;

When the opening free tripping area θ3 ＜ θb , the value range of β is 0～1.

Take T _i =360 ms , T 1 _i =120 ms , T 2 _i =60 ms , T 3 _i =100 ms , T 4 _i =80 ms , θa =30°, θb =20° as an example:

θ 1 = T 1 _i / T _i × 360° = 120/360 × 360° = 120°, which is greater than θa , then 0.75 ≤ α ≤ 1;

θ 3= T 3 _i / T _i ×360°=100/360×360°=100°, which is greater than θb , 0.8≤ α ≤1.

In this embodiment, it can be understood that θ is the central angle of the corresponding area.

In this embodiment, by selecting values within the value range of α and β , the block 50 can be stopped at a preset position in areas a and b , so that the block 50 can be stopped at a position where it can be freely brought into the closing tripping area 2 or the opening tripping area 4 when the circuit breaker handle is tripped.

In this embodiment, if the values of α and β are different, the positions of the stopper 50 in the area a and the area b are also different, and the values of α and β can be adjusted according to the specific positions where the stopper 50 needs to stay in the area a and the area b . For example, in the above example, when the stopper 50 needs to stay in the middle position of the area a , α can be set to α =1- θa / θ 1×0.5=0.875.

On the basis of the above embodiments, an embodiment of the present invention further provides a working method of a circuit breaker electric operating device, comprising:

Receive the instruction to obtain the opening and closing delay time;

The closing delay time D1 and the opening delay time D3 are obtained by using the above-mentioned method for obtaining the closing and opening delay of the circuit breaker electric operating device;

When the closing command is obtained, the control slider drives the shaft to stop rotating after a delay of D 1 after the block enters the closing area;

When the opening command is obtained, the control slider drives the shaft to stop rotating after a delay of D 3 after the block enters the opening area.

In one application scenario, in order to adapt to different brands and models of circuit breaker products and determine the precise closing delay time and opening delay time, after the product is assembled, the controller receives the closing and opening delay time acquisition instruction, and then controls the motor to drive the slider to drive the shaft to rotate continuously at a uniform speed, so that the block rotates at _least i circles, thereby obtaining historical data for calculating Ti _, T1i , T2i _, T3i _, and T4i , thereby calculating the _closing and opening delay time.

In other application scenarios, after the product leaves the factory, the user needs to re-update the precise closing delay time and opening delay time due to inaccurate positioning caused by mechanical structure wear, ambient temperature changes, etc. during use; _the controller receives the closing and opening delay time acquisition instruction and can call the stored historical time data of _the most recent block rotation i cycles to calculate Ti , T1i _, T2i _, T3i _, and T4i .

Based on this, optionally, in this embodiment, the historical data of i times can be the data obtained by the slider driving the rotating shaft to rotate continuously for i times during the pre-factory debugging process; it can also be the data recorded during the normal operation of the circuit breaker electric operation device after leaving the factory, when the slider driving the rotating shaft rotates for i times before the current closing or opening action.

The method and process of obtaining the closing delay time D1 and the opening delay time D3 by using the above-mentioned method for obtaining the closing and opening delay of the circuit breaker electric operating device are as described above and will not be repeated here.

The optional method of controlling the slider to drive the rotating shaft to stop rotating after a delay of D1 after the block enters the closing area after the closing command is obtained is:

After the closing command is obtained, the motor rotates. When it is detected that the Ph pin changes from a high level to a low level, it indicates that the block 50 enters the closing area 1, and the timing starts. When the time reaches D 1, the controller controls the motor to stop rotating.

The optional method of controlling the slider to drive the rotating shaft to stop rotating after a delay of D 3 after the block enters the opening area after the opening command is obtained is:

After the opening command is obtained, the motor rotates. When it is detected that the Pf pin changes from a high level to a low level, it indicates that the block 50 enters the opening area 3 from the closing tripping area 2, and the timing starts. When the time reaches D 3, the controller controls the motor to stop rotating.

On the basis of the above embodiments, an embodiment of the present invention further provides a circuit breaker electric operating device, comprising:

The slider 10 is mounted on the slide rail 20 and is used to connect with the handle of the circuit breaker;

The slider drives the rotating shaft 30, on which a cam 40 is arranged, and the cam 40 is connected to the slider 10 through a stopper 50;

The motor 60 is used to drive the slider to drive the rotating shaft 30 to rotate, and the slider driving the rotating shaft 30 drives the cam 40 to rotate, and the cam 40 drives the slider 10 to slide on the slide rail 20 through the stopper 50 to drive the handle of the circuit breaker;

A closing position sensor 70, an opening position sensor 80 and a controller, wherein the motor 60, the closing position sensor 70 and the opening position sensor 80 are all electrically connected to the controller;

The closing position sensor 70 is used to obtain a signal that the block enters and exits the closing area, and the opening position sensor 80 is used to obtain a signal that the block enters and exits the opening area;

The controller uses the working method of the circuit breaker electric operating device as described above to control the rotation of the motor.

To sum up, the circuit breaker electric operating device and the working method thereof of the present invention can correct the opening and closing delay time according to multiple data of the block rotation, and can overcome the technical problem of inaccurate stop position of the block caused by voltage, machinery, circuit breaker model and the like; the circuit breaker electric operating device and the working method thereof of the present invention have an adaptive function, and can obtain accurate opening and closing delay time after receiving the opening and closing delay time acquisition instruction before leaving the factory or during work, and have strong applicability; in addition, considering that the three-position circuit breaker needs to be able to trip successfully, a closing free tripping area and an opening free tripping area are defined in the block rotation area, and by limiting the delay coefficient, the block can be accurately delayed to stop in the closing free tripping area or the opening free tripping area.

It should be noted that the various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims (4)

1. The method for acquiring the opening and closing delay of the circuit breaker electric operating device is characterized by comprising the following steps of:

Obtaining time T _i for the ith rotation of the sliding block driving rotating shaft to complete one circle, and time T1 _i、T2_i、T3_i、T4_i for the stop block to pass through a closing region, a closing tripping region, a separating region and a separating tripping region in the circle, wherein the time T1 _i+T2_i+T3_i+T4_i=T_i is equal to the time T1;

Acquiring an ith closing delay calculation time D1 _i=αT1_i and an ith opening delay calculation time D3 _i=βT3_i;

Acquiring a closing delay time D1 according to D1 ₁～D1_i, and acquiring a opening delay time D3 according to D3 ₁～D3_i; wherein the method comprises the steps of

The method for calculating alpha comprises the following steps:

Calculating the angle of the closing area occupying the circumference: θ1=t1 _i/T_i x 360 °;

When the switching-on free tripping area theta 1 is more than or equal to theta a, 1-theta a/theta 1 is more than or equal to alpha and less than or equal to 1;

when the switching-on free tripping area theta 1 is smaller than theta a, the value range of alpha is 0-1;

The calculating method of beta comprises the following steps:

Calculating the angle of the opening area occupying the circumference: θ3=t3 _i/T_i x 360 °;

when the breaking free tripping area theta 3 is more than or equal to thetab, 1-thetab/theta3 is more than or equal to beta and less than or equal to 1;

when the breaking free tripping area theta 3 is smaller than thetab, the value range of beta is 0-1;

θa is the central angle of the closing free trip area a determined by the limiting conditions of the mechanical structure, and θb is the central angle of the opening free trip area b determined by the limiting conditions of the mechanical structure.

2. The opening/closing delay acquiring method according to claim 1, wherein,

The method for acquiring the closing delay time D1 according to the D1 ₁～D1_i comprises the following steps: taking an average value after removing the maximum value and the minimum value in D1 ₁～D1_i to be used as the value of D1;

The method for acquiring the opening delay time D3 according to the D3 ₁～D3_i comprises the following steps: the maximum and minimum values in D3 ₁～D3_i were removed and the average value was taken as the value of D3.

3. A method of operating a circuit breaker electrical operating device, comprising:

receiving an opening and closing delay time acquisition instruction;

The switching-on/off delay time D1 and the switching-off delay time D3 are acquired by adopting the switching-on/off delay acquisition method of the circuit breaker electric operation device according to any one of claims 1 or 2;

When a closing instruction is acquired, the control slide block drives the rotating shaft to stop rotating after the stop block enters a closing area and delays D1;

When the brake-off command is acquired, the control slide block drives the rotating shaft to stop rotating after the stop block enters the brake-off area and delays D3.

4. A circuit breaker electrical operating device, comprising:

the sliding block is arranged on the sliding rail and is used for being connected with a handle of the circuit breaker;

the sliding block drives the rotating shaft, a cam is arranged on the rotating shaft, and the cam is connected with the sliding block through a stop block;

The motor is used for driving the sliding block to drive the rotating shaft to rotate, the sliding block drives the rotating shaft to drive the cam to rotate, and the cam drives the sliding block to slide on the sliding rail through the stop block so as to drive the handle of the circuit breaker;

The motor, the switching-on position sensor and the switching-off position sensor are electrically connected with the controller;

The switching-on position sensor is used for acquiring signals of the stop block entering and exiting a switching-on area, and the switching-off position sensor is used for acquiring signals of the stop block entering and exiting a switching-off area;

the controller adopts the working method of the circuit breaker electric operating device as claimed in claim 3 to control the motor to rotate.