CN216390828U - Soft start adaptable to various voltages and different powers - Google Patents
Soft start adaptable to various voltages and different powers Download PDFInfo
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- CN216390828U CN216390828U CN202122156479.6U CN202122156479U CN216390828U CN 216390828 U CN216390828 U CN 216390828U CN 202122156479 U CN202122156479 U CN 202122156479U CN 216390828 U CN216390828 U CN 216390828U
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Abstract
The soft starter is suitable for soft starting with various voltages and different powers, and solves the problem of universality of different soft starters in the prior art. The high-voltage switch comprises a 10kV starting switch, a 6kV starting switch, an operating switch, a current transformer, a voltage transformer, an adjustable reactance device and a soft-start main control device. The three-phase ABC power supply is connected to the upper ends of the 10kV starting switch, the 6kV starting switch and the operating switch, and is connected with a voltage transformer in parallel; the lower end of the 10kV starting switch is connected with the head end of an adjustable reactance device x; the lower end of the 6kV starting switch is connected with the middle end of the adjustable reactance device y; the operation switch is connected with the z tail end of the adjustable reactance device and is connected with the upper end of the current transformer; the lower end of the current transformer is connected with the main motor. The soft start main control device is provided with a voltage detection module, a controller, a driving circuit and a current detection module which are electrically connected, and the controller is connected with a display module and an input module. The input module comprises a keyboard or a button; the display module is a display screen.
Description
Technical Field
The utility model relates to the technical field of three-phase asynchronous motor starting, in particular to a soft start which is suitable for various voltages and different powers.
Background
At present, with the acceleration of the industrialization process in China, high-voltage three-phase asynchronous motors are increasingly used in the industries of steel, chemical engineering and the like, and the motors are generally started in a voltage reduction mode. In the prior art, different soft starters are adopted for various voltages and different power sizes, the universality is not realized, the user cost is high, and the soft starter can give an alarm under the conditions of overpressure or undervoltage, so that the soft starter cannot be used; in special cases, it may even cause soft starter burnout.
Disclosure of Invention
The utility model provides a soft starter which is suitable for various voltages and different powers, and solves the problem of universality of different soft starters in the prior art.
The technical scheme of the utility model is realized as follows: the soft start device comprises a 10kV starting switch, a 6kV starting switch, an operating switch, a current transformer, a voltage transformer, an adjustable reactance device and a soft start main control device. The three-phase A/B/C power supply is connected with the upper ends of the 10kV starting switch, the 6kV starting switch and the operation switch, and is connected with a voltage transformer in parallel; the lower end of the 10kV starting switch is connected with the head end of an adjustable reactance device x; the lower end of the 6kV starting switch is connected with the middle end of the adjustable reactance device y; the operation switch is connected with the z tail end of the adjustable reactance device and is connected with the upper end of the current transformer; the lower end of the current transformer is connected with the main motor. The soft start main control device is provided with a voltage detection module, a controller, a driving circuit and a current detection module which are electrically connected, and the controller is connected with a display module and an input module.
Preferably, the input module comprises a keyboard or buttons; the display module is a display screen.
Preferably, the adjustable reactance device is a proprietary product previously developed by the same company, and is characterized in that: the adjustable reactance device comprises a reactance coil, a magnetic core, a control driving mechanism and a low-voltage control power switch, wherein an AC380/220V low-voltage control power supply is provided for the control driving mechanism through the low-voltage control power switch, the control driving mechanism receives starting time and starting current information when the motor is started, and drives the magnetic core to move in the reactance coil to change the impedance value of the reactance coil so as to adjust the starting voltage of the motor and achieve the effect of soft start of the motor.
Preferably, the magnetic cores are arranged at different positions of the reactance coils, the impedance values of the adjustable reactance devices are different, and the impedance values of the motors with different powers are different, so that the motors with different powers can be started by adjusting the impedance values of the adjustable reactance devices.
Preferably, the three-phase ABC power supply is converted into low voltage through the voltage transformer and is transmitted to the voltage detection module for voltage detection, data of the detected three-phase voltage is fed back to the controller, and the controller outputs the voltage to the display module for display; the user can set the working voltage grade of the circuit according to the detected voltage and the working voltage grade is saved by the controller. After the voltage level is set, the controller sends a starting instruction to the trigger module through the driving circuit, so that the corresponding voltage level starting switch is switched on, the motor is started, and when the motor runs at full pressure, the running switch is triggered to be switched on.
Preferably, the rated current of the motor can be input through the keyboard to select the initial position of the magnetic core on the reactance coil, so that the problem of universality of soft starters with different power sizes is solved.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Description of the drawings:
FIG. 1 is a single line diagram of an electrical circuit connection of an embodiment of the present invention;
FIG. 2 is an electrical main wiring diagram of an embodiment of the present invention;
FIG. 3 is a schematic diagram of a reactor coil according to an embodiment of the present invention;
the component names of the figure numbers in the figure are: 1. the device comprises a current transformer 2, an operation switch 3, a 10kV starting switch 4, a 6kV starting switch 5, an adjustable reactance device 6, a low-voltage control power switch 7, a reactance coil 8, a magnetic core 9, a control driving mechanism 10, a main motor 11, a voltage transformer 12 and a soft start main control device.
Detailed Description
The utility model is described below with reference to the accompanying drawings: as shown in figure 1, the utility model comprises a 10kV starting switch (3), a 6kV starting switch (4), an operation switch (2), a current transformer (1), a voltage transformer (11), an adjustable reactance device (5) and a soft start main control device (12). The three-phase ABC power supply is connected with the upper ends of the 10kV starting switch (3), the 6kV starting switch (4) and the operation switch (2), and is connected with a voltage transformer (11) in parallel; the lower end of the 10kV starting switch (3) is connected with the x head end of the adjustable reactance device (5); the lower end of the 6kV starting switch (4) is connected with the middle end of the adjustable reactance device (5); the operation switch (2) is connected with the z tail end of the adjustable reactance device (5) and is connected with the upper end of the current transformer (1); the lower end of the current transformer (1) is connected with a main motor (10).
The soft start main control device (12) is provided with a voltage detection module, a controller, a driving circuit and a current detection module which are connected through cables, and the controller is connected with a display module and an input module. The input module comprises a keyboard or a button; the display module is a display screen.
The 10kV starting switch (3) and the 6kV starting switch (4) are interlocked, only one switch can be switched on, and simultaneously, the 10kV starting switch and the 6kV starting switch are interlocked, any one switch is switched on, and the operation switch (2) cannot be switched on.
When the 10kV starting switch (3) is switched on, all the coil turns of the reactance coil (7) x-z are in a starting loop; when the 6kV starting switch (4) is switched on, the y-z of the reactance coil (7) and the number of turns of part of the coil are in a starting loop.
The adjustable reactance device (5) is a patent product developed by the company in advance, and is characterized in that: the adjustable reactance device (5) comprises a reactance coil (7), a magnetic core (8), a control driving mechanism (9) and a low-voltage control power switch (6), an AC380/220V low-voltage control power supply is provided for the control driving mechanism (9) through the low-voltage control power switch (6), the control driving mechanism (9) receives starting time and starting current information when the motor is started, the magnetic core (8) is driven to move in the reactance coil (7), and the impedance value of the reactance coil (7) is changed, so that the starting voltage of the main motor (10) is adjusted, and the soft starting effect of the main motor (10) is achieved.
According to fig. 2, in the present invention, when the magnetic core (8) is completely inserted into the reactance coil (7), the impedance of the reactance coil (7) is the maximum, and when the magnetic core (8) is completely removed from the reactance coil (7), the impedance of the reactance coil (7) is the minimum, and the voltage drop in the circuit is only 2-4%. The positions of the magnetic cores (8) in the reactance coils (7) are different, the impedance values of the adjustable reactance devices (5) are different, the impedance values in the motors with different powers are different, and the motors with different powers can be started in a matching way by adjusting the impedance values of the adjustable reactance devices.
When the three-phase A/B/C power supply is used, the three-phase A/B/C power supply is converted into low voltage through the voltage transformer (11) and is transmitted to the voltage detection module for voltage detection, data of the detected three-phase voltage is fed back to the controller, and the controller outputs the voltage to the display module for display. The user can set the working voltage grade of the circuit according to the detected voltage and the working voltage grade is saved by the controller. After the voltage class is selected, a user can input the rated current Ie of the motor through a keyboard, the controller sends an instruction to the adjustable reactance device (5) according to the rated current, and the driving mechanism (9) is controlled to drive the magnetic core to reach the corresponding position of the reactance coil, so that the actual effective number of turns of the reactance coil (7) is ensured.
After the voltage class and the rated current are set, the controller sends a starting instruction to the trigger module through the driving circuit, so that the corresponding 10kV starting switch (3) or 6kV starting switch (4) is switched on, and the motor is started. When the motor runs at full pressure, the controller triggers the running switch (2) to suck.
For example: the 10kV three-phase A/B/C power supply is converted into low voltage of 100V through a voltage transformer (11) and is conveyed to a voltage detection module for voltage detection, whether the detected three-phase voltage reaches a set value of 10kV or not is judged, and if the detected voltage is not within the range of 10kV +/-5%, a controller starts protection to enable a circuit to be incapable of starting. When the voltage meeting the set value is connected into the controller, the controller inputs the voltage into the display module for display; and inputting the voltage grade of 10kV by a keyboard, storing data by a controller, and finishing the setting of the voltage grade. After the voltage class is selected, a user can input the rated current Ie of the motor through a keyboard, the controller sends an instruction to the adjustable reactance device according to the rated current Ie, and the controller controls the driving mechanism (9) to drive the magnetic core (8) to reach the corresponding position of the reactance coil (7) after receiving the instruction, so that the actual effective coil turn number of the reactance coil (7) is ensured.
The user closes the low-voltage control power switch (6), sends the start instruction again through the controller and passes through drive circuit to trigger module, and trigger module receives the start instruction, then triggers to switch on, makes 10kV starting switch (3) combined floodgate, controls actuating mechanism (9) and drives magnetic core (8) promptly and remove to inserting reactance coil (7) completely in, 10kV starting switch (3) then automatic closure, and operation switch (2) disconnection, 10kV starting switch (3) and operation switch (2) interlock each other, can not close simultaneously. The rated working voltage of the power supply is reduced by the lowest initial starting voltage through the reactance coil (7), enough starting torque can be provided to rotate the main motor (10), the main motor (10) starts to run slowly, the starting current of the main motor is generally about 1 time of the rated current, at the moment, the control driving mechanism (9) starts to drive the magnetic core (8) to move out slowly in the reactance coil (7), the impedance of the reactance coil (7) is reduced gradually, the starting voltage of the main motor (10) is increased gradually, and the starting current is increased gradually. Setting the maximum starting current according to the working condition of a site, controlling the moving-out time and position of the magnetic core (8) in the reactance coil (7), when the magnetic core (8) is completely moved out of the reactance coil (7), the starting voltage of the main motor (10) is more than 95% of the rated voltage, which is enough to enable the main motor (10) to successfully start and reach the normal rotating speed, the starting current and the starting time information are transmitted to the controller, the controller sends a command to operate the switch (2) to automatically close and continuously operate, the starting switch (3) is disconnected, the adjustable reactance device (5) quits the operation, the main motor (10) is successfully started and normally operates, and the effect of successful soft start is achieved.
When the main power supply is 6kV, the low voltage is converted into 60V through the voltage transformer (11) and is transmitted to the voltage detection module for voltage detection, and the controller can only send a command to close the 6kV starting switch (11).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. A soft start adaptable to multiple voltages, different powers, comprising: the device comprises a 10kV starting switch, a 6kV starting switch, an operating switch, a current transformer, a voltage transformer, an adjustable reactance device and a soft start main control device; the method is characterized in that: the three-phase A/B/C power supply is connected with the upper ends of the 10kV starting switch, the 6kV starting switch and the operation switch, and is connected with a voltage transformer in parallel; the lower end of the 10kV starting switch is connected with the head end of an adjustable reactance device x; the lower end of the 6kV starting switch is connected with the middle end of the adjustable reactance device y; the operation switch is connected with the z tail end of the adjustable reactance device and is connected with the upper end of the current transformer; the lower end of the current transformer is connected with a main motor; the soft start main control device is provided with a voltage detection module, a controller, a driving circuit and a current detection module which are electrically connected, and the controller is connected with a display module and an input module.
2. The soft start adaptable to various voltages and different powers of claim 1, wherein the input module comprises a keyboard or a button; the display module is a display screen.
3. The soft start device capable of adapting to various voltages and different powers as claimed in claim 1, wherein the 10kV starting switch and the 6kV starting switch are interlocked and can only be switched on one, and are interlocked with the operating switch, and any one of the switches is switched on, and the operating switch cannot be switched on.
4. The soft start adaptable to various voltages and different powers as claimed in claim 1, wherein said adjustable reactance means comprises a reactance coil, a magnetic core, a control driving mechanism and a low voltage control power switch; the AC380/220V low-voltage control power supply is supplied to the control driving mechanism through the low-voltage control power switch; the control driving mechanism receives the starting time and starting current information when the motor is started, drives the magnetic core to move in the reactance coil, and changes the impedance value of the reactance coil so as to adjust the starting voltage of the motor and achieve the effect of soft starting of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122156479.6U CN216390828U (en) | 2021-09-08 | 2021-09-08 | Soft start adaptable to various voltages and different powers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122156479.6U CN216390828U (en) | 2021-09-08 | 2021-09-08 | Soft start adaptable to various voltages and different powers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216390828U true CN216390828U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122156479.6U Expired - Fee Related CN216390828U (en) | 2021-09-08 | 2021-09-08 | Soft start adaptable to various voltages and different powers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216390828U (en) |
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2021
- 2021-09-08 CN CN202122156479.6U patent/CN216390828U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220426 |
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| CF01 | Termination of patent right due to non-payment of annual fee |