CN221081186U - Select starting drive of multi-functional Variable Frequency Speed Governing (VFSG) all-in-one - Google Patents
Select starting drive of multi-functional Variable Frequency Speed Governing (VFSG) all-in-one Download PDFInfo
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- CN221081186U CN221081186U CN202322819286.3U CN202322819286U CN221081186U CN 221081186 U CN221081186 U CN 221081186U CN 202322819286 U CN202322819286 U CN 202322819286U CN 221081186 U CN221081186 U CN 221081186U
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Abstract
The utility model provides a selection starting device of a multifunctional variable-frequency speed regulation integrated machine, which comprises a transformer, a first input cable connector, a second input cable connector, a KM1 contactor, a KM2 contactor, a first switch and a second switch; the three-phase circuit between input cable and the converter has set gradually first input cable connector, KM1 contactor, the three-phase circuit between converter and the inverter motor is provided with the second input cable connector, first input cable connector is connected to the second input cable connector through KM2 contactor, the transformer is connected with first input cable connector, is provided with the first switch of control KM1 contactor break-make after the vary voltage to and be provided with the second switch of control KM2 contactor break-make. According to the utility model, when the frequency converter part of the multifunctional frequency conversion speed regulation integrated machine fails and can not be recovered to be normal in a short time, the input of the multifunctional frequency conversion speed regulation integrated machine is switched to the bypass mode to the motor through the vacuum contactor.
Description
Technical Field
The utility model relates to a variable frequency speed regulation integrated machine, in particular to a selection starting device of a multifunctional variable frequency speed regulation integrated machine.
Background
The conventional frequency conversion speed regulation all-in-one machine for mines is mostly in an integrated form of a frequency converter, a frequency conversion motor, a speed reducer and the like, but in the actual use process, the frequency converter part can be damaged by frequency conversion internal devices caused by factors such as severe working environment and the like, after-sales service personnel cannot arrive at the site in a short time, or the after-sales service personnel can not finish recovery in a short time due to serious equipment faults after arriving at the site.
In addition, the wiring terminal and the frequency conversion part of the motor part of the conventional frequency conversion speed regulation integrated machine are in the same cavity, no independent cavity exists, and the mining side cannot temporarily operate in a mode that the roadway frequency converter drives the scraper conveyor motor.
Due to the fact that the multifunctional variable-frequency speed regulation integrated machine cannot normally operate, production of a mining party is stopped, and normal coal discharge is affected, so that loss of the mining party is serious. Therefore, the starting mode of the multifunctional variable frequency speed regulation all-in-one machine in the prior art is improved.
Disclosure of utility model
The utility model provides a selection starting device of a multifunctional variable frequency speed regulation integrated machine, which solves the problem that a frequency converter part cannot enable a subsequent variable frequency motor to continue to operate due to the damage of internal devices, and the technical scheme is as follows:
A selection starting device of a multifunctional variable frequency speed regulation integrated machine comprises a transformer, a first input cable connector, a second input cable connector, a KM1 contactor, a KM2 contactor, a first switch and a second switch; the three-phase circuit between input cable and the converter has set gradually first input cable connector, KM1 contactor, the three-phase circuit between converter and the inverter motor is provided with the second input cable connector, first input cable connector is connected to the second input cable connector through KM2 contactor, the transformer is connected with first input cable connector, is provided with the first switch of control KM1 contactor break-make after the vary voltage to and be provided with the second switch of control KM2 contactor break-make.
The first input cable connector and the second input cable connector are three-phase wiring.
The transformer is used for realizing the step-down processing of the input cable voltage, reducing the 3300V voltage to 220V, and then being connected with the first switch and the second switch respectively.
The KM1 contactor and the KM2 contactor are vacuum contactors.
And a fuse is arranged between the KM2 contactor and the first input cable connector and is used as a short-circuit protection device.
The first switch and the second switch are provided with mechanical interlocking devices, so that the first switch and the second switch can only have one switch to realize a closed state at the same time, and further the KM1 contactor and the KM2 contactor can only have one work.
The secondary side voltage 220L of the transformer is connected in series with the first switch and the second switch which are arranged in parallel.
The first switch comprises main contactor coils KM1 and KM2 of external control switches K1 and KM1 which are connected in sequence, and a main contactor normally-closed point KM22 of the contactor.
The second switch comprises main contactor coils KM2 of external control switches K2 and KM2 which are connected in sequence, and a main contactor normally-closed point KM11 of the KM1 contactor.
The multifunctional variable frequency speed regulation integrated machine is characterized in that the variable frequency motor is directly started by bypassing the frequency converter part through the external structure design of the switch device, so that the variable frequency motor can be directly started by adopting the frequency converter part, and the multifunctional variable frequency speed regulation integrated machine has a better production recovery effect. According to the utility model, when the frequency converter part of the multifunctional frequency conversion speed regulation integrated machine fails and can not be recovered to be normal in a short time, the input of the multifunctional frequency conversion speed regulation integrated machine is switched to the motor through the vacuum contactor in a bypass mode, the input is temporarily controlled through the external standby frequency converter under the conditions of no influence on explosion loss and no change of lines, and the repairing of the frequency conversion failure part of the multifunctional frequency conversion speed regulation integrated machine is waited for an ore side maintenance class.
Drawings
Fig. 1 is a schematic structural diagram of a selective starting device of the multifunctional variable frequency speed regulation integrated machine.
Detailed Description
As shown in fig. 1, the selection starting device of the multifunctional variable frequency speed regulation integrated machine comprises a transformer 5, a first input cable connector 6, a second input cable connector 7, a KM1 contactor 8, a KM2 contactor 9, a first switch 10 and a second switch 11; the three-phase circuit between the input cable 1 (namely the input end of the frequency conversion part of the multifunctional frequency conversion speed regulation integrated machine) and the frequency converter 2 is sequentially provided with a first input cable connector 6 and a KM1 contactor 8, the three-phase circuit between the frequency converter 2 and the frequency conversion motor 3 is provided with a second input cable connector 7, the first input cable connector 6 is connected to the second input cable connector 7 through a KM2 contactor 9, the transformer 5 is connected with the first input cable connector 6, and a first switch 10 for controlling the on-off of the KM1 contactor 8 and a second switch 11 for controlling the on-off of the KM2 contactor 9 are arranged after transformation.
The multifunctional variable frequency speed regulation all-in-one machine is characterized in that a frequency converter 2 is arranged between an input cable 1 and a variable frequency motor 3, when a part of the frequency converter 2 fails, the variable frequency motor 3 cannot be started, the variable frequency function of the frequency converter 2 is not provided, the input cable 1 can directly drive the variable frequency motor 3, and the effect is just inferior to that of the control effect of the frequency converter 2. Wherein, three-phase wiring is all between input cable 1 and converter 2, and between converter 2 and inverter motor 3. The KM1 contactor 8 and KM2 contactor 9 are both vacuum contactors.
The first input cable connector 6 is also provided with a three-phase wiring, the three-phase wiring which is led out is connected with the KM2 contactor 9 and the transformer 5, the transformer 5 is a single-phase transformer, the input end of the transformer is connected with any two phases (namely, primary side voltage) of the three phases of the first input cable connector 6, the transformer 5 is used for realizing voltage reduction treatment on the voltage of the input cable 1, the primary side 3300V voltage is reduced to be the secondary side 220V, and then the primary side 3300V voltage is respectively connected with the first switch 10 and the second switch 11. The three-phase wiring of the KM2 contactor 9 is connected to the three-phase wiring at the front end of the variable frequency motor 3 through a second input cable connector 7.
The connection mode of the transformer 5 and the first switch 10 is as follows: the secondary side voltage of the transformer 5 is single-phase 220V alternating current, 220L and 220N are used for voltage polarity distinction, the secondary side voltage 220L of the transformer 5 is connected with the first switch 10 in series (the inside is connected to 220N after passing through the external control switch K1, the main contactor coil KM1 and the main contactor normally-closed point KM22 to form a series loop, wherein when the external control switch K1 acts, the main contactor coil KM1 is electrified, the main contactor coil KM1 is in contact with the main contactor 8, the main contactor coil KM1 is assisted to be opened, and the variable frequency integrated machine can be normally used.
The connection mode of the transformer 5 and the first switch 11 is as follows: the secondary side voltage 220L of the transformer 5 is connected with the second switch 11 in series (the inside is connected to 220N after passing through an external control switch K2, a main contactor coil KM2 and a main contactor normally-closed point KM11 to form a series loop, wherein when the external control switch K2 acts, the main contactor coil KM2 is electrified, the main contactor coil KM2 assists the main contactor normally-closed point KM11 to be disconnected when the main contactor of the KM2 contactor 9 is in contact, the input of the multifunctional variable frequency speed regulation integrated machine is switched into a bypass mode to be connected to a motor through a vacuum contactor, and the multifunctional variable frequency speed regulation integrated machine can be normally used through temporary control of an external standby frequency converter under the condition of not affecting explosion loss and not changing a circuit, and in the state, because the KM2 assists the normally-closed point KM11 to be disconnected, even if the external control switch K1 is closed in the loop of the first switch 10 is realized, and the normally-closed point KM11 of the main contactor 8 of the KM1 cannot be electrically operated).
A fuse 4 may be disposed between the KM2 contactor 9 and the first input cable connector 6, as a short-circuit protection device, to achieve further protection for the KM2 contactor 9. Furthermore, the first switch 10 and the second switch 11 have mechanical interlocking devices, and in this state, because the auxiliary normally-closed contact of the main contactor coil KM1 is opened, even if the external control switch K2 is closed in the loop of the second switch 11, the main contactor coil KM2 cannot get the electric action, and the mechanical interlocking principle is adopted in this part, so that only one switch of the first switch 10 and the second switch 11 can be closed at the same time, and further only one of the KM1 contactor 8 and the KM2 contactor 9 can work, so that the other vacuum contactor can not be attracted after the attraction of one vacuum contactor is realized.
When the intelligent control system is used, one end of the KM2 contactor 9 is connected with the input cable 1, the other end of the KM2 contactor 9 is connected with a wiring terminal of the variable frequency motor 3 (namely, the output end of a frequency converter part of the multifunctional variable frequency speed regulating integrated machine), a short-circuit protection device such as a fuse 4 is additionally arranged at the front end of the KM2 contactor 9, when the multifunctional variable frequency speed regulating integrated machine is in fault (namely, the frequency converter 2 in the figure 1 is in short circuit), the KM1 contactor 8 is automatically disconnected, a variable frequency loop of the multifunctional variable frequency speed regulating integrated machine is cut off, and the transformer 5 is in front of the KM1 contactor 8 and is not affected by the fault, so that the transformer 5 always keeps a charged state, and can enable a second switch 11 (K2) to be closed to enter a bypass state, at the moment, the variable frequency input cable 1 of the multifunctional variable frequency speed regulating integrated machine can be controlled by using an external standby frequency converter in a state without replacing the cable underground, or by adopting a power frequency circuit for control, and after the KM2 main contactor 9 is closed, the external standby frequency converter can be directly connected with the input cable 1 in the multifunctional variable frequency speed regulating integrated machine through a quick plug of the mining cable connector for realizing external variable frequency control. And the main contactor coil km1 inside the first switch 10 and the main contactor coil km2 inside the second switch 11 are mechanically interlocked, and after one vacuum contactor is attracted, the other vacuum contactor is ensured not to be attracted.
The utility model can be applied to the frequency conversion all-in-one machine with multiple voltage levels of 660V, 1140V, 3300V and the like, and the utility model is based on the prior scheme of the multifunctional frequency conversion and speed regulation all-in-one machine, namely, on the basis of adding a frequency conversion motor to a frequency converter, an internal frequency conversion loop in the multifunctional frequency conversion and speed regulation all-in-one machine can be switched into an input power supply through a cable connector and a vacuum contactor in a form of an external given signal after the frequency converter fails, and then the input power supply is directly connected with a wiring terminal of the frequency conversion motor, so that a fault circuit is cut off, and the switched loop can be directly connected with the input power supply 1 by adopting power frequency three-phase alternating current or through a roadway frequency converter, so that the operation of a single frequency conversion motor 3 is controlled.
According to the utility model, when the variable frequency part of the multifunctional variable frequency speed regulation integrated machine fails and can not be recovered to be normal in a short time, the input of the multifunctional variable frequency speed regulation integrated machine is switched to the motor through the vacuum contactor in a bypass mode, the input is temporarily controlled through the external standby frequency converter under the conditions of no influence on explosion loss and no change of a line, and the repairing of the variable frequency fault part of the multifunctional variable frequency speed regulation integrated machine is waited for an ore side maintenance work, so that the working efficiency of the ore side is increased, and the service pressure is relieved.
Claims (9)
1. A select starting device of multi-functional Variable Frequency Speed Governing (VFSG) all-in-one, its characterized in that: the device comprises a transformer, a first input cable connector, a second input cable connector, a KM1 contactor, a KM2 contactor, a first switch and a second switch; the three-phase circuit between input cable and the converter has set gradually first input cable connector, KM1 contactor, the three-phase circuit between converter and the inverter motor is provided with the second input cable connector, first input cable connector is connected to the second input cable connector through KM2 contactor, the transformer is connected with first input cable connector, is provided with the first switch of control KM1 contactor break-make after the vary voltage to and be provided with the second switch of control KM2 contactor break-make.
2. The selective start device of the multifunctional variable frequency speed regulation integrated machine according to claim 1, wherein: the first input cable connector and the second input cable connector are three-phase wiring.
3. The selective start device of the multifunctional variable frequency speed regulation integrated machine according to claim 1, wherein: the transformer is used for realizing the step-down processing of the input cable voltage, reducing the 3300V voltage to 220V, and then being connected with the first switch and the second switch respectively.
4. The selective start device of the multifunctional variable frequency speed regulation integrated machine according to claim 1, wherein: the KM1 contactor and the KM2 contactor are vacuum contactors.
5. The selective start device of the multifunctional variable frequency speed regulation integrated machine according to claim 1, wherein: and a fuse is arranged between the KM2 contactor and the first input cable connector and is used as a short-circuit protection device.
6. The selective start device of the multifunctional variable frequency speed regulation integrated machine according to claim 1, wherein: the first switch and the second switch are provided with mechanical interlocking devices, so that the first switch and the second switch can only have one switch to realize a closed state at the same time, and further the KM1 contactor and the KM2 contactor can only have one work.
7. The selective start device of the multifunctional variable frequency speed regulation integrated machine according to claim 1, wherein: the secondary side voltage 220L of the transformer is connected in series with the first switch and the second switch which are arranged in parallel.
8. The selective start device of the multifunctional variable frequency speed regulation integrated machine according to claim 1, wherein: the first switch comprises main contactor coils KM1 and KM2 of external control switches K1 and KM1 which are connected in sequence, and a main contactor normally-closed point KM22 of the contactor.
9. The selective start device of the multifunctional variable frequency speed regulation integrated machine according to claim 1, wherein: the second switch comprises main contactor coils KM2 of external control switches K2 and KM2 which are connected in sequence, and a main contactor normally-closed point KM11 of the KM1 contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322819286.3U CN221081186U (en) | 2023-10-20 | 2023-10-20 | Select starting drive of multi-functional Variable Frequency Speed Governing (VFSG) all-in-one |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322819286.3U CN221081186U (en) | 2023-10-20 | 2023-10-20 | Select starting drive of multi-functional Variable Frequency Speed Governing (VFSG) all-in-one |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221081186U true CN221081186U (en) | 2024-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322819286.3U Active CN221081186U (en) | 2023-10-20 | 2023-10-20 | Select starting drive of multi-functional Variable Frequency Speed Governing (VFSG) all-in-one |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221081186U (en) |
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2023
- 2023-10-20 CN CN202322819286.3U patent/CN221081186U/en active Active
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