CN213185932U - High-voltage frequency conversion-soft start switching device - Google Patents
High-voltage frequency conversion-soft start switching device Download PDFInfo
- Publication number
- CN213185932U CN213185932U CN202022392428.9U CN202022392428U CN213185932U CN 213185932 U CN213185932 U CN 213185932U CN 202022392428 U CN202022392428 U CN 202022392428U CN 213185932 U CN213185932 U CN 213185932U
- Authority
- CN
- China
- Prior art keywords
- controller
- selection switch
- voltage
- power supply
- soft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model provides a high-voltage frequency conversion-soft start switching device, which comprises a first selector switch connected with a power supply and a second selector switch connected with a high-voltage motor, wherein the first selector switch and the second selector switch are electrically connected with a controller; the first selection switch is connected with the power supply and the frequency converter or connected with the power supply and the soft start mechanism; the second selection switch is connected with the frequency converter and the high-voltage motor, or connected with the soft-start mechanism and the high-voltage motor. The utility model discloses can pass through the controller monitoring the operating condition of converter is worked as when the converter trouble can not export the PWM signal, the controller control first selector switch with the second selector switch will soft mechanism inserts the power with between the high-voltage motor, realize automatic switch-over. The controller is electrically connected with the access unit and inputs control signals to the controller through the input unit to control the states of the first selection switch and the second selection switch.
Description
Technical Field
The utility model relates to a high-voltage machine controlgear field especially relates to a high-pressure frequency conversion-soft auto-change over device that plays.
Background
The high-voltage motor is controlled by the high-voltage frequency converter in a variable frequency mode during normal operation, and when the high-voltage frequency converter fails, the high-voltage frequency converter can be manually switched to a high-voltage soft starter to perform soft start control, so that the reliability of power supply of the high-voltage motor is improved.
The switching between the high-voltage frequency converter and the high-voltage soft starter is realized through a manual switching device consisting of four groups of high-voltage isolation knives in the prior art, generally, mechanical interlocking is arranged among the four high-voltage isolation knives, and the frequency conversion loop and the soft starting loop are completely independent and cannot be simultaneously powered. The existing scheme has the defects that four high-voltage isolation knives are needed in one set of switch cabinet, and the size of the cabinet body is large. Need carry out the soft switch-over of frequency conversion through four operating handle, manual operation, complex operation has the risk of electrocuting, and is higher to operative skill requirement of operative employee. Mechanical interlocking is arranged among the four isolation knives, if the mechanical interlocking fails, electrical accidents easily occur, and the power supply reliability is not high.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, the utility model provides a high-voltage frequency conversion-soft starting switching device.
The utility model provides a high-voltage frequency conversion-soft start switching device, which comprises a first selector switch connected with a power supply and a second selector switch connected with a high-voltage motor, wherein,
the first selection switch and the second selection switch are electrically connected to a controller;
the first selection switch is connected with the power supply and the frequency converter or connected with the power supply and the soft start mechanism;
the second selection switch is connected with the frequency converter and the high-voltage motor, or connected with the soft-start mechanism and the high-voltage motor.
Preferably, the first selection switch and the second selection switch are vacuum contactors, and an electromagnetic system of the vacuum contactors is electrically connected with the controller;
the controller controls an electromagnetic system of the vacuum contactor to realize that the first selection switch is connected with the power supply and the frequency converter or is connected with the power supply and the soft lifting mechanism; and the second selection switch is connected with the frequency converter and the high-voltage motor, or the soft-start mechanism and the high-voltage motor.
Preferably, a connection between the power supply and the first selection switch and a connection between the high-voltage motor and the second selection switch are respectively provided with a charge indicator, the charge indicator is connected to a capacitor of the connection, the capacitor is connected with an indicator lamp, and the indicator lamp is grounded.
Preferably, an overvoltage protector is further arranged on a connection path between the second selection switch and the high-voltage motor, and the overvoltage protector is grounded.
Preferably, the controller is provided with a frequency measurement module, the controller is electrically connected with a drain electrode of the field effect transistor, a grid electrode of the field effect transistor is connected with the output of the frequency converter, a source electrode of the field effect transistor is grounded, and the drain electrode of the field effect transistor is connected with a pull-up power supply.
Preferably, the controller electric connection alarm unit, alarm unit includes speaker and alarm lamp.
Preferably, the controller is electrically connected to the input unit and the display unit.
Compared with the prior art, the utility model discloses a high-pressure frequency conversion-soft auto-change over device that plays has following beneficial effect:
the utility model provides a high-pressure frequency conversion-soft auto-change over device's ability of starting can pass through the controller monitoring the operating condition of converter is worked as when the converter trouble can not export the PWM signal, the controller control first selector switch with second selector switch will soft mechanism inserts the power with between the high-voltage motor. Automatic switching can be achieved. The controller is connected with the alarm unit, and when the frequency converter fails, the controller controls the alarm unit to give an alarm to remind workers of paying attention. The first selection switch and the second selection switch adopt vacuum contactors, the vacuum contactors are controlled by the controller, manual opening and closing are not needed, and electric shock risks are reduced. The controller is electrically connected with the input unit, a control signal is input into the controller through the input unit, and the controller controls the states of the first selector switch and the second selector switch according to the control signal, so that the frequency converter and the soft-start mechanism are switched through the cooperation of the input unit and the controller according to the will of a user.
Drawings
Fig. 1 is a schematic circuit diagram of a high-voltage frequency conversion-soft start switching device provided by the present invention;
fig. 2 is a schematic diagram of a controller and an alarm unit provided by the present invention;
fig. 3 is a schematic diagram of a controller, an input unit and a display unit provided by the present invention;
fig. 4 is a schematic diagram of the controller, the first selection switch and the second selection switch provided by the present invention.
The symbols in the figures and their meanings are as follows:
1. the device comprises a first selector switch 2, a controller 3, an input unit 4, a display unit 5, an alarm unit 6, a direct current power supply 7, a charged indicator 8, a soft start mechanism 9, a frequency converter 10, a second selector switch 11 and an overvoltage protector.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and embodiments. It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Referring to fig. 1, the present invention provides a high voltage frequency conversion-soft start switching device, which includes a first selector switch 1 connected to a power supply and a second selector switch 10 connected to a high voltage motor, wherein the first selector switch 1 and the second selector switch 10 are electrically connected to a controller 2; the first selection switch 1 is connected with the power supply and the frequency converter 9 or connected with the power supply and the soft start mechanism 8; the second selection switch 10 is connected with the frequency converter 9 and the high-voltage motor, or connected with the soft starting mechanism 8 and the high-voltage motor.
In a specific implementation process, the first selection switch 1 and the second selection switch 10 are vacuum contactors, and an electromagnetic system of the vacuum contactor is electrically connected with the controller 2; specifically, referring to fig. 4, the electromagnetic system of the vacuum contactor is powered by a dc power supply 6, the dc power supply 6 is respectively connected to the first selection switch 1 and the second selection switch 10 through two fet switches, the two fet switches are respectively connected to the controller 2, and the controller 2 controls the electromagnetic system of the vacuum contactor by controlling the fet switches to realize that the first selection switch 1 is connected to the power supply and the frequency converter 9 or to the power supply and the soft start mechanism 8; the second selection switch 10 is connected with the frequency converter 9 and the high-voltage motor, or connected with the soft starting mechanism 8 and the high-voltage motor.
In a specific implementation process, the controller 2 may be an AT89C51 single chip microcomputer, the controller 2 is electrically connected to the power supply circuit, the controller 2 is electrically connected to the crystal oscillator circuit, and the controller 2 is electrically connected to the reset circuit. The controller 2 is electrically connected to an alarm unit 5, specifically, as shown in fig. 2, the controller 2 is connected to two other field effect transistor switches through two IO ports, and the two other field effect transistor switches are respectively worn on the speaker and the alarm lamp. Referring to fig. 3, the controller 2 is electrically connected to an input unit 3 and a display unit 4, the input unit 3 is a determinant keyboard, the input unit includes an On/Off key, a reset key, a frequency converter selection key and a soft start mechanism selection key, the On/Off key is a power-On control switch of a power supply circuit of the controller 2, the reset key is a control key of the reset circuit of the controller 2, the controller 2 is reset after a certain time of resetting, different signals are input to the controller 2 through the frequency converter selection key or the soft start mechanism selection key, and control instructions of the first selection switch 1 and the second selection switch 10 are input to the controller 2. The display unit 4 is used for displaying the states of the first selection switch 1 and the second selection switch 10. Specifically, the display unit 4 includes two LED lamps capable of emitting different colors, when the first selection switch 1 and the second selection switch 10 are connected to the frequency converter 9, the controller 2 controls one LED lamp to be turned on, and when the first selection switch 1 and the second selection switch 10 are connected to the soft-start mechanism, the controller 2 controls the other LED lamp to be turned on.
The controller 2 is connected with a drain electrode of a field effect transistor driven by an output PWM signal of the frequency converter 9 through an IO port, the controller 2 is provided with a frequency measurement module, the controller 2 is electrically connected with the drain electrode of the field effect transistor through the IO port, a grid electrode of the field effect transistor is connected with the output of the frequency converter 9 through a processing circuit, the processing circuit comprises an alternating current voltage reduction module and a zero-crossing comparator, the processing circuit reduces the output of the frequency converter 9 through the alternating current voltage reduction module and changes the signal into a square wave through the zero-crossing comparator, a source electrode of the field effect transistor is grounded, the drain electrode of the field effect transistor is connected with a pull-up power supply, the frequency measurement module detects the level signal change frequency caused by the on and off of the field effect transistor, when the frequency disappears under the working condition, the frequency measurement module cannot detect the level signal change, and the frequency converter 9 may break down, the controller 2 controls an alarm unit 5 to give an alarm, specifically, the controller 2 controls the conduction of the field effect transistor switch to control the loudspeaker to sound, and the controller 2 controls the conduction of the other field effect transistor switch to enable the alarm lamp to emit light. The controller 2 controls the first selector switch 1 and the second selector switch 10 to connect the soft start mechanism between the power supply and the high-voltage motor. A user can input a control signal for selecting the frequency converter 9 or the soft-start mechanism 8 to the controller 2 through the input unit 3, and the controller 2 controls the first selection switch and the second selection switch according to the control signal to realize the selection of the frequency converter 9 or the soft-start mechanism 8. The overvoltage protector 11 arranged between the second selection switch and the high-voltage motor can be conducted when the voltage value is too high, and discharges to the ground, so that the high-voltage motor is short-circuited, and the high-voltage motor is protected.
In a specific implementation process, a connection between the power supply and the first selector switch 1 and a connection between the high-voltage motor and the second selector switch 10 are respectively provided with a charge indicator 7, the charge indicator 7 is connected to a capacitor of the connection, the capacitor is connected with an indicator lamp, and the indicator lamp is grounded.
In a specific implementation process, an overvoltage protector 11 is further arranged on a connection between the second selection switch 10 and the high-voltage motor, and the overvoltage protector 11 is grounded. When the voltage is higher than a certain value, the overvoltage protector 11 conducts and discharges to protect the high-voltage motor.
The utility model provides a high-pressure frequency conversion-soft auto-change over device principle does:
the utility model provides a high-voltage frequency conversion-soft switching device works as when converter 9 has the output, the output signal of converter 9 passes through the switch-on of field effect transistor is cut off and is produced high low level signal, controller 2 receives high low level signal and passes through the change frequency of frequency measurement module survey level signal in controller 2, when converter 9 leads to the output to disappear because of the trouble, controller 2 detects that level signal disappears, then connect alarm unit 5 the IO mouth of controller 2 produces the signal control field effect transistor switch of high low change and switches on and cut off, makes the speaker sound production, the alarm lamp glimmers; the controller 2 controls the first selector switch 1 and the second selector switch 10 to connect the soft-start mechanism 8 between the power supply and the high-voltage motor. Through which the user can pass
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.
Claims (7)
1. A high-voltage frequency conversion-soft start switching device is characterized by comprising a first selection switch (1) connected with a power supply and a second selection switch (10) connected with a high-voltage motor, wherein,
the first selection switch (1) and the second selection switch (10) are electrically connected to a controller (2);
the first selection switch (1) is connected with the power supply and the frequency converter (9) or connected with the power supply and the soft starting mechanism (8);
the second selector switch (10) is connected with the frequency converter (9) and the high-voltage motor, or connected with the soft-start mechanism (8) and the high-voltage motor.
2. The high-voltage frequency conversion-soft start switching device according to claim 1, wherein the first selection switch (1) and the second selection switch (10) are vacuum contactors, and electromagnetic systems of the vacuum contactors are electrically connected with the controller (2);
the controller (2) controls an electromagnetic system of the vacuum contactor to realize that the first selection switch (1) is connected with the power supply and a frequency converter (9) or is connected with the power supply and a soft start mechanism (8); the second selection switch (10) is connected with the frequency converter (9) and the high-voltage motor, or the soft-start mechanism (8) and the high-voltage motor.
3. A high-voltage frequency conversion-soft start switching device according to claim 1, characterized in that a connection between the power supply and the first selector switch (1) and a connection between the high-voltage motor and the second selector switch (10) are respectively provided with a charge indicator (7), the charge indicator (7) is connected to a capacitor of the connection, the capacitor is connected with an indicator light, and the indicator light is grounded.
4. The high-voltage frequency conversion-soft start switching device according to claim 1, wherein an overvoltage protector (11) is further arranged on a connection between the second selector switch (10) and the high-voltage motor, and the overvoltage protector (11) is grounded.
5. The high-voltage frequency conversion-soft start switching device according to claim 1, wherein the controller (2) is configured with a frequency measurement module, the controller is electrically connected with a drain electrode of a field effect transistor, a grid electrode of the field effect transistor is connected with an output of the frequency converter (9), a source electrode of the field effect transistor is grounded, and a drain electrode of the field effect transistor is connected with a pull-up power supply.
6. The high-voltage frequency conversion-soft start switching device according to claim 5, wherein the controller (2) is electrically connected with an alarm unit, and the alarm unit comprises a loudspeaker and an alarm lamp.
7. The high-voltage frequency conversion-soft start switching device according to claim 5, wherein the controller (2) is electrically connected with the input unit (3) and the display unit (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022392428.9U CN213185932U (en) | 2020-10-23 | 2020-10-23 | High-voltage frequency conversion-soft start switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022392428.9U CN213185932U (en) | 2020-10-23 | 2020-10-23 | High-voltage frequency conversion-soft start switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213185932U true CN213185932U (en) | 2021-05-11 |
Family
ID=75779536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022392428.9U Active CN213185932U (en) | 2020-10-23 | 2020-10-23 | High-voltage frequency conversion-soft start switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213185932U (en) |
-
2020
- 2020-10-23 CN CN202022392428.9U patent/CN213185932U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2015149579A1 (en) | Current monitoring type electronic arc-extinguishing apparatus | |
| CN106707903B (en) | Novel permanent magnet mechanism controller of high-voltage circuit breaker | |
| RU2007134316A (en) | KIT ADAPTER / BATTERY (OPTIONS), ELECTRIC TOOL (OPTIONS), USING THIS KIT, ADAPTER AND CONNECTOR | |
| CN102332702B (en) | Intelligent real-time on-line displaying and controlling leakage protector and control method thereof | |
| CN100478706C (en) | Electric exploration signal transmitter | |
| CN205994373U (en) | Food cooking machine and its electric supply installation | |
| CN109754874A (en) | Anti- error cut-off machine switch controlling device and method for robotic assisted surgery equipment | |
| CN213185932U (en) | High-voltage frequency conversion-soft start switching device | |
| CN103984281A (en) | Permanent magnet switch controller and method based on IGBT and programmable logic technology | |
| CN218960908U (en) | Electrosurgical high-frequency operation equipment | |
| CN103631154A (en) | Dish-washing machine, power supply control circuit and power off control method | |
| CN203481578U (en) | Remote-control type power switching device | |
| CN203149341U (en) | Radio frequency lath CO2 laser PLC control system | |
| CN206181495U (en) | Single live wire intelligence switch gets electric system | |
| CN214956721U (en) | Solid-state direct current breaker | |
| CN103116308A (en) | PLC (programmable logic control) system of radiofrequency slab CO<2> laser device | |
| CN106451486A (en) | Phase-selection switching control system of high-voltage circuit breaker | |
| CN115132544A (en) | Solid-state direct-current circuit breaker and control method thereof | |
| CN203951266U (en) | Based on the permanent-magnet switch controller of IGBT and programmable logic technology | |
| CN218350471U (en) | Load open circuit detection circuit | |
| CN206455827U (en) | A kind of automatic stone cutting machine | |
| CN204304420U (en) | User demarcation switch intelligent miniature protective device | |
| CN103810804A (en) | Line breaking type antitheft alarm | |
| JP2002252923A (en) | Output branching device | |
| CN210898503U (en) | Program-controlled voltage protection relay |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |