CN216794852U - Power unit discharging device - Google Patents
Power unit discharging device Download PDFInfo
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- CN216794852U CN216794852U CN202220468051.7U CN202220468051U CN216794852U CN 216794852 U CN216794852 U CN 216794852U CN 202220468051 U CN202220468051 U CN 202220468051U CN 216794852 U CN216794852 U CN 216794852U
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Abstract
The utility model discloses a power unit discharging device which comprises a box body, a high-voltage insulating wiring bar and a control power plug, wherein a main power wiring port and a control power interface are respectively arranged on the outer wall of the top of the box body, one end of the high-voltage insulating wiring bar is connected with the main power wiring port, the control power plug is connected with the control power interface, a circuit breaker and a time relay are respectively fixed on the inner wall of the box body through bolts, and the circuit breaker is parallel to the time relay. The utility model designs the change of the discharge resistance automatically controlled by the time relay according to the discharge curve of the capacitor, so that the discharge circuit discharges at the maximum value of the rated current, the discharge time is reduced, the working efficiency is improved, the specialization and the lean of the work are realized, the fault handling efficiency and the repair efficiency are improved, the labor intensity of maintenance personnel is reduced, the maintenance efficiency is improved, and the equipment fault rate and the labor cost of a company are reduced.
Description
Technical Field
The utility model relates to the technical field of discharge devices, in particular to a power unit discharge device.
Background
The control of the four mechanism motors on the shore bridge achieves the control effect through frequency conversion and speed regulation, wherein power frequency electricity is input into the shore bridge, is converted into 680V direct current through the rectification function of a rectifier, and is converted into alternating current with the frequency required by the motor through the frequency conversion function of a frequency converter for driving the motor to run. The motor drive of four large mechanisms of the shore bridge is driven by two large drive devices, namely a rectifier and a frequency converter. It can be seen that in the electrical control of a quayside bridge, the frequency converter occupies an absolute core position.
The frequency converter mainly comprises a rectifying unit, a high-capacity capacitor, an inverter and a controller. The rectifying unit is mainly used for converting alternating current with fixed working frequency into direct current. The high-capacity capacitor is mainly used for storing converted electric energy. The inverter is mainly used for converting direct current into square waves with different frequencies, widths and amplitudes. The controller is mainly used for controlling the amplitude and the pulse width of the output square wave, superposing the output square wave into alternating current approximate to sine wave and driving an alternating current motor, and the controller comprises a high-capacity capacitor for storing electric energy according to the composition and the working principle of the frequency converter. Therefore, when the frequency converter needs to be overhauled, the frequency converter has electric energy after power failure, all the electric energy cannot be cut off at once, the high-capacity capacitor needs to be discharged for a period of time, the frequency converter can be completely uncharged, and the frequency converter can work by maintainers. According to the design, the original voltage of the frequency converter DC676H5 used by the me shore bridge is 680v, the total capacitance value is 680000uf, the discharge resistance is 400 ohms, and the discharge time needs about 23 min.
The discharging device in the prior art has long discharging time, occupies more than half of the maintenance time, greatly influences the efficiency of fault first-aid repair and maintenance of the power unit, and reduces the working efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a power unit discharging device to overcome the defect of long discharging time in the prior art.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a power unit discharging device comprises a box body, a high-voltage insulating wiring rod and a control power plug, wherein a main power wiring port and a control power interface are respectively arranged on the outer wall of the top of the box body, one end of the high-voltage insulating wiring rod is connected with the main power wiring port, and the control power plug is connected with the control power interface.
As a preferred embodiment of the utility model, the inner wall of the box body is respectively fixed with a circuit breaker and a time relay through bolts, and the circuit breaker is parallel to the time relay.
In a preferred embodiment of the present invention, the contactor and the discharge power resistor are fixed to the inner wall of the case at one side by bolts, and the contactor is located above the discharge power resistor.
As a preferred embodiment of the utility model, the other end of the high-voltage insulated terminal bar, which is remote from the main electrical connection opening, is used for connecting an output of a power unit.
As a preferred embodiment of the utility model, the other end of the control power plug, which is far away from the control power interface, is connected with a common AC220v power supply.
As a preferred embodiment of the present invention, a thermal relay is connected to the contactor.
In the technical scheme, the power unit discharge device provided by the utility model (1) designs the change of the discharge resistor automatically controlled by the time relay according to the discharge curve of the capacitor, so that the discharge circuit discharges at the maximum value of rated current, the discharge time is reduced, the working efficiency is improved, the specialization and the refinement of work are realized, the fault processing efficiency and the project repair efficiency are improved, the labor intensity of maintenance personnel is reduced, the maintenance efficiency is improved, and the equipment fault rate and the labor cost of a company are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is a schematic perspective view of a power cell discharge device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an electrical schematic diagram provided in an embodiment of a power cell discharge device according to the present invention.
Description of the reference numerals:
1 high-voltage insulation wiring rod, 2 control power plugs, 3 main power interface, 4 control power interface, 5 circuit breaker, 6 time relay, 7 contactor, 8 discharge power resistor and 9 box body.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1-2, a power unit discharging device provided in an embodiment of the present invention includes a box 9, a high-voltage insulating wire rod 1, and a control power plug 2, wherein a main power interface 3 and a control power interface 4 are respectively disposed on an outer wall of a top of the box 9, one end of the high-voltage insulating wire rod 1 is connected to the main power interface 3, and the control power plug 2 is connected to the control power interface 4.
The utility model provides a power unit discharging device which comprises a box body 9, a high-voltage insulating wiring rod 1 and a control power plug 2, wherein a main power wiring port 3 and a control power interface 4 are respectively arranged on the outer wall of the top of the box body 9, one end of the high-voltage insulating wiring rod 1 is connected with the main power wiring port 3, the control power plug 2 is connected with the control power interface 4, and a connecting seat is arranged at the bottom end of the control power plug 2 and is conveniently plugged on the control power interface 4.
Has the beneficial effects that: the change of the discharge resistance automatically controlled by the time relay 6 is designed according to the discharge curve of the capacitor, so that the discharge circuit discharges at the maximum value of the rated current, the discharge time is reduced, the working efficiency is improved, the specialization and the lean of the work are realized, the efficiency of fault handling and item repair is improved, the labor intensity of maintenance personnel is reduced, the maintenance efficiency is improved, and the equipment fault rate and the labor cost of a company are reduced.
In another embodiment provided by the utility model, as shown in fig. 1, the breaker 5 and the time relay 6 are respectively fixed on the inner wall of the box body 9 through bolts, and the breaker 5 is parallel to the time relay 6.
In another embodiment provided by the utility model, as shown in fig. 1, the contactor 7 and the discharge power resistor 8 are respectively fixed on the inner wall of one side of the box body 9 through bolts, and the contactor 7 is positioned above the discharge power resistor 8, so that the design is very reasonable and small.
In another embodiment of the utility model, as shown in fig. 1, the other end of the high voltage insulated bar 1 remote from the main electrical port 3 is used to connect the output of a power unit.
In another embodiment of the present invention, as shown in fig. 1, the other end of the control power plug 2 away from the control power interface 4 is connected to a common AC220v power supply for supplying power to the device.
In another embodiment of the present invention, as shown in fig. 1, the contactor 7 is connected with a thermal relay, and the thermal relay is used as an overload protection element.
The working principle is as follows: when the power unit discharging device is used, one end of a high-voltage insulating wire connecting rod 1 is used for being connected with an output end of a power unit, the other end of the high-voltage insulating wire connecting rod is connected with a main power connection port 3 of the discharging device, a control power supply plug 2 is connected with a common AC220v power supply, one end of the control power supply plug is connected with a control power supply interface 4 of the discharging device, QF2 is a control power supply switch, when QF2 is connected, KM1 is electrified and attracted, a main circuit is connected, the power unit starts to be connected with three resistors of R1, R2 and R3 in series connection to form a total resistance of 150 ohms, a time relay KT1 starts to time, after 60s, the voltage drops to about 370v, the time relay KT1 functions, a contactor KM2 coil is connected, KM2 is attracted to short circuit the R1 resistor circuit, at the moment, the power unit continues to discharge with the total resistance of 75 ohms of R2 and R3 in series connection, the time relay KT2 starts to time, after 60s, the voltage drops to 120v, the time relay 2 functions, the coil KM3 is switched on, KM3 pulls in and shorts out R2 resistance, and power unit continues to discharge with R325 ohm total resistance this moment, and the completion of discharging after about 60s, the device has designed by time relay 6 automatic control discharge resistance's change according to the curve that the electric capacity discharges for discharge circuit discharges at the maximum value of rated current, has reduced discharge time, has improved work efficiency.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and are not to be construed as limiting the scope of the utility model.
Claims (6)
1. A power unit discharging device comprises a box body (9), a high-voltage insulating wire connecting rod (1) and a control power supply plug (2), and is characterized in that a main power connection port (3) and a control power supply interface (4) are respectively arranged on the outer wall of the top of the box body (9), one end of the high-voltage insulating wire connecting rod (1) is connected with the main power connection port (3), and the control power supply plug (2) is connected with the control power supply interface (4).
2. A power unit discharge apparatus according to claim 1, wherein the inner wall of the box (9) is fixed with a circuit breaker (5) and a time relay (6) by bolts, and the circuit breaker (5) and the time relay (6) are parallel.
3. A power unit discharge device according to claim 1, wherein the inner wall of one side of the box (9) is fixed with a contactor (7) and a discharge power resistor (8) through bolts, and the contactor (7) is located above the discharge power resistor (8).
4. A power cell discharge apparatus as claimed in claim 1, characterised in that the other end of the high voltage insulated terminal bar (1) remote from the main electrical connection mouth (3) is adapted to be connected to an output of a power cell.
5. A power unit discharge apparatus as claimed in claim 1, wherein the other end of the control power plug (2) remote from the control power interface (4) is connected to a common AC220v power supply.
6. A power cell discharge apparatus as claimed in claim 3, wherein a thermal relay is connected to the contactor (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220468051.7U CN216794852U (en) | 2022-03-04 | 2022-03-04 | Power unit discharging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220468051.7U CN216794852U (en) | 2022-03-04 | 2022-03-04 | Power unit discharging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216794852U true CN216794852U (en) | 2022-06-21 |
Family
ID=82000883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220468051.7U Active CN216794852U (en) | 2022-03-04 | 2022-03-04 | Power unit discharging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216794852U (en) |
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2022
- 2022-03-04 CN CN202220468051.7U patent/CN216794852U/en active Active
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