CN2715421Y - Variable-frequency control system control cabinet - Google Patents
Variable-frequency control system control cabinet Download PDFInfo
- Publication number
- CN2715421Y CN2715421Y CN 200420032171 CN200420032171U CN2715421Y CN 2715421 Y CN2715421 Y CN 2715421Y CN 200420032171 CN200420032171 CN 200420032171 CN 200420032171 U CN200420032171 U CN 200420032171U CN 2715421 Y CN2715421 Y CN 2715421Y
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- frequency
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- programmable logic
- logic controller
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Abstract
The utility model discloses a control cabinet of variable-frequency speed governing system for speed governing of motor, comprising: a master-control power switch, a converter and an output circuit which are connected in series; an auto frequency-conversion control system composed of an LCD touch control screen, a programmable logic controller, a converter and a frequency-conversion control circuit in the circuit; a manual power-frequency control system composed of a switching device, a switching control panel and a power-frequency control circuit. Wherein, the LCD touch control screen is connected with the programmable logic controller via a communication interface, the external terminal of the converter and the controlled unit in the frequency-conversion control circuit. The executing unit of the frequency-conversion control circuit is connected with the controlled unit. The switching device is connected with the switching control panel. One part of the master-control node is actively connected with the main power of the power-frequency control circuit in branch, and the other part is connected with the operating branch in parallel. The communication interface with network monitoring is connected with the programmable logic controller. The LCD touch control panel is arranged on the face of the control cabinet. The utility model has the advantages of conservation of energy, fast operation and improved security.
Description
Technical field
The utility model relates to a kind of electrical control cubicles that motor operating state is used of regulating, and especially handles system's control cubicle that frequency converter changes motor operating state about the utilization programmable system.
Background technology
At present, change the control cubicle of motor operating state, most ways that change frequency of supply that adopt are regulated, i.e. frequency converter supporting with it of configuration between main transformer electric line and motor.Change it and be subjected to electric frequency, regulate motor speed, this controlling schemes is simple, yet once frequency converter breaks down, motor operating state is out of control, to object or the system that is driven production accident will take place, and perhaps causes heavy economic losses, and visible coefficient of safety is lower.
Summary of the invention
At above-mentioned weak point, the utility model provides a kind of superpower fault tolerance that has, and multistage speed control and PID control are also deposited, can RMON, energy-efficient, the convenient switching, variable frequency adjustment system control cubicle swift to operate, that the operating state clear display is understood.
The technical scheme that its technical problem that solves the utility model adopts is: it includes by the lcd touch control flow, the variable frequency regulating speed control unit that programmable logic controller (PLC), communication interface, frequency converter and frequency conversion control circuit are formed; Have by being used for the switching device shifter that power frequency and frequency conversion are switched, the frequency conversion switch unit that switching controls screen and the power frequency control circuit supporting with it are formed is formed.
Wherein the lcd touch control flow adopts a kind of communication interface among RS232, the RS485 to link to each other with programmable logic controller (PLC), utilize the external cabling terminal of frequency converter to link to each other with the programmable logic controller (PLC) input terminal, realize multistage speed and PID closed-loop adjustment, programmable logic controller (PLC) carries out communication with a kind of interface of frequency converter employing RS232, RS485 and is connected, and frequency converter links to each other with motor by frequency conversion control circuit; Switching device shifter and switching controls screen links to each other, and switching controls is provided with the power frequency control circuit in shielding, and the switching device shifter main contact links to each other with the electric main line that is subjected in the power frequency control circuit, and the power frequency control circuit links to each other with motor; For realizing telecommunication network control, also be provided with the network communication interface that links to each other with programmable logic controller (PLC) in this control cubicle, can adopt design of Configuration Software easily, realize many Frequency Converter Control, change the motor operating state control circuit: by being subjected to switching device shifter conversion operating state, the electromagnetic switch and the fuse that handled by programmable logic controller (PLC), electromagnetic switch is often opened node, contactor constitutes and is connected in series, power frequency control circuit: include the switching device shifter control contact that be subjected to PLC controls in parallel and be used for the function circuit that two groups of electric motor startings stop with it, wherein the switching device shifter electric contact 1. 2./3. 4., 7. 8. be serially connected on the power supply main line, 10. 5. 6./9. another group be attempted by on the control locking circuit, control main motor for one group in two groups of electric motor starting shut-down operation circuit, control standby motor for one group, its circuit structure is identical, be provided with the operation branch road on the control power circuit, electric motor protecting branch road and starting stop light and show branch road; In the operation branch road: near-earth (installation and control cashier's office in a shop) operation normally closed switch, long-range (installing in the motor house) operation normally closed switch; near-earth (installation and control cashier's office in a shop) operation normal open switch, long-range (installing in the motor house) operation normal open switch; cause the normally closed node of contactor on another group operation branch road as the contact of interlocking, the contactor that uses on motor protecter and this branch road is connected successively.Be provided with in this control cubicle and be used for motor protecter sampling current circuit.It has three shunt circuits, and every sampling current circuit is composed in series by instrument transformer and punching circle; Be used to show that power consumption, operating current are too little, compose in series, and loop ground connection, metering circuit and compose in series potential circuit with kilowatt-hour meter by instrument transformer, kilowatt-hour meter, ammeter.
The novel beneficial effect of this reality is that fault tolerance is strong, and multistage speed and pid control function are also deposited, but RMON is energy-efficient, and it is convenient, swift to operate manually to automatically switch, and the operating state clear display is understood.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is prior art frequency conversion speed-adjusting system control principle figure;
Fig. 2 is the utility model frequency conversion speed-adjusting system control principle block diagram;
Fig. 3 is frequency control electric control theory figure among Fig. 2;
Fig. 4 is a winding diagram in kind among Fig. 3;
Fig. 5 is the main motor power frequency control circuit figure that the utlity model has switching device shifter;
Fig. 6 be the standby motor of Fig. 5 control circuit figure;
Fig. 7 is the motor protecter sampling current winding diagram among Fig. 5,6;
Fig. 8 is the utility model single-phase watt-hour meter electric current winding diagram;
Fig. 9 is main motor frequency conversion control circuit figure among Fig. 3;
Figure 10 is standby motor frequency conversion control circuit figure among Fig. 3;
Figure 11 is a main motor frequency conversion control relay elementary diagram among Fig. 3;
Figure 12 is a main motor power frequency control relay elementary diagram among Fig. 3;
Figure 13 is a standby motor frequency conversion control relay elementary diagram among Fig. 3;
Figure 14 is a standby motor power frequency control relay elementary diagram among Fig. 3;
Figure 15 is the single-phase plating table of a utility model voltage winding diagram;
Figure 16 is the utility model ammeter, a kilowatt-hour meter winding diagram in kind;
Figure 17 is that the utility model variable frequency regulating speed control unit is connected winding diagram in kind with the transition of frequency conversion switch control unit;
Figure 18 is the utility model panel layout.
Among the figure: DC/24V---DC power supply; AC2201/60---transformer; RS485---communication interface; 1～4ZJ---auxiliary relay; 1～4C three-phase ac contactor; the DB motor protecter; ILHa; ILHb; ILHc---instrument transformer; Wh---kilowatt-hour meter; IA---ammeter, 01: shut down indication TD, 02:1# machine indication YD; 03:2# machine indication RD; 04: operation indication ED, 05: faulty indication BD, 06: power frequency indication GD; 07: frequency conversion indication BD; 08: reset button FT, 09: frequency conversion numerical control operation panel, 010: the lcd touch control flow; 011: ammeter IA; 012: ammeter IA ', 013: change over switch KK, 014:1# pump power frequency operation indication 1RL; 015:1# machine power frequency is shut down indication 1GL; 016:2# machine power frequency operation indication 2RL, 017:2# machine power frequency is shut down indication 2GL, and the 018:1# power frequency operation is often opened button SST; 019:1# power frequency stop button SSTP; 020:2# machine power frequency operation button SST, 021:2# machine power frequency stop button SSTP, 022:1# motor master control mains switch; 023:2# motor master control mains switch; 024: programmable logic controller (PLC), 025: frequency converter, 026 frequency conversion control circuit; 027: main motor; 028: standby motor, 029: communication interface, 030: the power frequency control circuit; 031: switching controls screen, 032: directly control unit 1～4ZJ auxiliary relay.
Embodiment
As shown in Figure 2, the utility model is by lcd touch control flow (010), programmable logic controller (PLC) (024), frequency converter (025), frequency conversion control circuit (026) is formed automatic frequency-conversion speed governing master control system, by operation lcd touch control flow (010), control main motor (027) or standby motor (028) are worked automatically in the frequency conversion condition after making its signal transmit successively, or when frequency converter failure, by 2ZJ in the straight control unit (032), 4ZJ signal relay starting power frequency control circuit (030), make the work of main motor (027) or standby motor (028), in lcd touch control flow (010) and programmable logic controller (PLC) (024) control loop, also be provided with when automatic control fault and can pass through switching device shifter (013), switching controls screen (031) and power frequency control circuit (030) are realized far away, the manual power frequency control of short range.
Wherein: programmable logic controller (PLC) (024) is a haplotype, and I/O counts and chooses a kind of in 10～128 wantonly; Lcd touch control flow (010) is chosen wantonly, a kind of in 3 inches～15 inches; The adaptive power of motor of frequency converter (025) is chosen a kind of in 18.5KW～550KW wantonly; Switching device shifter (013) is selected common diverter switch for use, air change over switch, a kind of in the vacuum change over switch.
In addition, for realizing telecommunication network control, also be provided with the network communication interface (029) that links to each other with programmable logic controller (PLC) (024) in this control cubicle, this interface links to each other with host computer, design of Configuration Software be can adopt easily like this, the system control break of frequency converter networking its motor conversion and supervision realized.
For further implementing the utility model, also can further specify wherein frequency conversion control circuit with reference to 3～18 figure, comprise by transformer (AC220V/160V), programmable logic controller (PLC) (024), the power frequency frequency conversion is control and display element automatically, frequency converter (025), lcd touch control flow (010) and power supply (DC/24V), reset button FT forms, electric current is leaded up to transformer (AC220V/160V) and programmable logic controller (PLC) (025) L, the N terminal links to each other, 1ZJ, 2ZJ, 3ZJ, 4ZJ auxiliary relay circuit, ED, TD, GD, BD, BZ, YD, annunciator circuit such as RD, one end altogether, the other end respectively with the Y4 of programmable logic controller (PLC) (025), Y3, Y24, Y5, Y20, Y21, Y22, Y23, Y25, Y26, the Y27 terminal links to each other, frequency converter FOR, COM, SS1, SS2, TA, the TC terminal respectively with programmable logic controller (PLC) Y0, C0, Y1, Y2, X6, the 24G terminal links to each other, has the RS485 communication interface on the frequency converter simultaneously, also can directly link to each other with programmable logic controller (PLC), connect with lcd touch control flow (010) with DC power supply (DC/24V) through reset button FT (08) in another road of power supply, this control flow links to each other with programmable logic controller (PLC) by communication interface RS232 or RS485, and wiring in kind can be with reference to Fig. 4;
Wherein 1., 2. contact links to each other with the programmable logic controller (PLC) power circuit, 3., 4. switching device shifter (013) is a multiple spot change over switch, shown in KK among Fig. 5; 7.; 8. 2 winding points are connected with the power circuit of each power frequency control circuit (030) respectively; each power frequency control circuit (030) structure is identical; be that it is by function circuit; protective circuit and display circuit parallel connection combine; wherein function circuit stops normally closed button SSTP/SSTP (19) by power frequency; often open button SST '; SST (018); interlocking point 4C; No. 4,2C polyphone back and motor protecter (DB); (DB) 2 terminals link to each other; contactor (2C) in No. 3 terminals of this protector and the function circuit; (4C) link to each other; 1# power frequency operation indication 1RL (014); 1GL (015) often opens with its 2C output; normally closed contact is connected in the control power circuit; often open establish self-protection circuit and switching device shifter between the contact of button and be converted to automatic mode of operation after; 5. an excision SST being convenient to control automatically and increasing often opens button work; 6. and 9.; 10. node short circuit current; 1# in addition; 2# power frequency control circuit is established in the other side's circuit mutually into interlocking contact 2C; 4C; be intended to guarantee the specification requirement of unit work only, wiring in kind can be with reference to Figure 12; Figure 14 and figure (17).Also be provided with motor protecter (DB) sampling current circuit in this control, this circuit includes three branch roads that instrument transformer, punching circle are composed in series, ground connection after each branch road parallel connection; Be provided be used to measure, show size of current measurement loop, instrument transformer in this road (ILHb), kilowatt-hour meter (Wh), ammeter (IA, IA ') series connection back ground connection; Be provided with two groups and be used for variable frequency control, connect the frequency conversion control circuit that frequency converter (025) and motor (027), (028) are subjected to circuit, this route fuse (1Fu, 3Fu), auxiliary relay contact (1ZJ, 3ZJ), A.C. contactor (1C, 3C) are composed in series, one end links to each other with frequency converter, and the other end is linked to each other by circuit with motor; And be provided with and be subjected to PLC controls, carry out four groups of auxiliary relays (1ZJ, 2ZJ, 3ZJ, 4ZJ) branch road of the automatic power frequency control of control of hand automatic frequency-conversion and hand, one end ground connection, the other end link to each other with terminal Y4, Y3, Y24, the Y5 of programmable logic controller (PLC) (024) respectively.Cabinet face upper left quarter is furnished with shuts down indication TD (01), 1# pump indication YD (02), 2# pump indication RD (03) operation indication ED (04), faulty indication BZ (05), power frequency indication GD (06), frequency conversion indication BD (07), reset button FT (08), middle part, a left side is furnished with frequency converter numerical control operation panel (09), lcd touch control flow (010); Cabinet face upper right quarter is furnished with ammeter 1A (011); ammeter 1A ' (012); change over switch KK (013); 1# power frequency operation indication 1RL (014); the 1# power frequency is shut down indication 1GL (015); 2# power frequency operation indication 2RL (016); the 2# power frequency is shut down indication 2GL (017); 1# power frequency operation button SST (018); 1# power frequency stop button SSTP (019), 2# power frequency stop button SST (020), 2# stop button SSTP (021); right middle is furnished with 1# motor master switch (022), 2# motor master mains switch in modern age (023).
When in automatic control state, when dropping into converting operation, at first switching device shifter (013) is put at auto state, 1. → 2. change over switch KK is connected by point, programmable logic controller (PLC) (024), selected working machine group number and converting operation mode, get electricly as 1ZJ, frequency converter and motor connection line are connected in three-phase alternating current contact 1C adhesive, operation liquid crystal touch screen (010) gets final product work; When work drive motor breaks down, when starting standby machine operation, operation lcd touch control flow selects standby unit work, get as 3ZJ, frequency converter and standby motor connection line are connected in three-phase ac contactor 3C adhesive, operate lcd touch control flow (010) then and make its work; When under the need auto state during power frequency operation, select operational mode by lcd touch control flow (01), select the work unit again, operate its starting, as 2ZJ or 4ZJ adhesive, its node 2ZJ or 4ZJ closure, chosen unit work; When auto state lost efficacy (frequency converter or PLC fault) for keeping normal operation, with switching device shifter (013) diverter switch KK, place manual state, direct control starting button (can select the button on the control panel, also optional on-the-spot near-earth button) makes its work.
Claims (2)
1, a kind of frequency conversion speed-adjusting system control cubicle includes the master control mains switch, frequency converter and outlet line series control circuit, it is characterized in that being provided with in the control circuit by the lcd touch control flow, programmable logic controller (PLC), the automatic frequency-conversion control system that frequency converter and frequency conversion control circuit are formed, by switching device shifter, the switching controls screen, the manual power frequency control system that the power frequency control circuit is formed and be used for the communication interface of network monitoring, wherein the lcd touch control flow links to each other with programmable logic controller (PLC) by communication interface, the frequency converter outside terminal links to each other with the programmable logic controller (PLC) terminal, has the RS485 communication interface on the frequency converter simultaneously, also can directly link to each other with programmable logic controller (PLC), controlled cell in the frequency conversion control circuit links to each other with programmable logic controller (PLC), performance element links to each other with controlled motor, switching device shifter links to each other with the switching controls screen, its a part of main contact props up with power frequency control circuit main power source and links to each other, another main contact is in parallel with the operation branch road, communication interface one end links to each other with programmable logic controller (PLC), the other end is to host computer, the lcd touch control flow and with the supporting guidance panel of frequency converter, it is located on the panel of this control cubicle.
2, frequency conversion speed-adjusting system control cubicle according to claim 1 is characterized in that said programmable logic controller (PLC) is count a kind of in 10～128 of modular I/O; Lcd touch control flow panel size is a kind of in 3 inches～15 inches; The adaptive power of motor of frequency converter is a kind of among 18.0KW～550KW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420032171 CN2715421Y (en) | 2004-06-22 | 2004-06-22 | Variable-frequency control system control cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420032171 CN2715421Y (en) | 2004-06-22 | 2004-06-22 | Variable-frequency control system control cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2715421Y true CN2715421Y (en) | 2005-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420032171 Expired - Lifetime CN2715421Y (en) | 2004-06-22 | 2004-06-22 | Variable-frequency control system control cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2715421Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866657A (en) * | 2011-07-08 | 2013-01-09 | 苏州徕卡节能电气技术有限公司 | Man-machine communication type power-saving cabinet |
| CN105607517A (en) * | 2016-01-13 | 2016-05-25 | 曹百权 | Time-sharing control energy-saving instrument of frequency converter |
| CN107039890A (en) * | 2017-05-11 | 2017-08-11 | 珠海格力电器股份有限公司 | Electric control cabinet |
| CN110044035A (en) * | 2019-05-16 | 2019-07-23 | 珠海格力电器股份有限公司 | Fault-tolerant circuit and control method for variable-frequency air conditioner controller |
-
2004
- 2004-06-22 CN CN 200420032171 patent/CN2715421Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866657A (en) * | 2011-07-08 | 2013-01-09 | 苏州徕卡节能电气技术有限公司 | Man-machine communication type power-saving cabinet |
| CN105607517A (en) * | 2016-01-13 | 2016-05-25 | 曹百权 | Time-sharing control energy-saving instrument of frequency converter |
| CN107039890A (en) * | 2017-05-11 | 2017-08-11 | 珠海格力电器股份有限公司 | Electric control cabinet |
| CN110044035A (en) * | 2019-05-16 | 2019-07-23 | 珠海格力电器股份有限公司 | Fault-tolerant circuit and control method for variable-frequency air conditioner controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: DAQING CHENGFENGTIAN ELECTRIC CO., LTD. Free format text: FORMER NAME: DAQING FENGTIAN ELECTRIC POWER EQUIPMENT PLANT |
|
| CP03 | Change of name, title or address |
Address after: 163001 No. 22 Zhong An street, five middle road, Saertu District, Heilongjiang, Daqing Patentee after: Daqing Shengfengtian Electrical Co., Ltd. Address before: West Road 163000 in Heilongjiang Province, Daqing City Ranghulu District No. 101 Patentee before: Daqing Fengtian Electric Power Equipment Plant |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140622 Granted publication date: 20050803 |