CN217643195U - Multifunctional control system with two-band frequency control and speed regulation - Google Patents
Multifunctional control system with two-band frequency control and speed regulation Download PDFInfo
- Publication number
- CN217643195U CN217643195U CN202221078797.3U CN202221078797U CN217643195U CN 217643195 U CN217643195 U CN 217643195U CN 202221078797 U CN202221078797 U CN 202221078797U CN 217643195 U CN217643195 U CN 217643195U
- Authority
- CN
- China
- Prior art keywords
- frequency
- loop
- frequency conversion
- contactor
- power
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Landscapes
- Control Of Multiple Motors (AREA)
Abstract
A multifunctional control system with two frequency conversion speed regulation relates to the technical field of control systems, and has the structure that: the main circuit breaker is connected with a control power supply, a frequency conversion loop and a power frequency loop, the control power supply is connected with a touch screen and a PLC (programmable logic controller), the touch screen is connected with the PLC in series, and the frequency conversion loop is connected with the power frequency loop in parallel; the frequency conversion loop is formed by connecting a frequency converter and a frequency conversion contactor group in series; the power frequency loop is formed by connecting a power frequency contactor set and a thermal relay protector set in series, the variable frequency contactor set is formed by connecting two variable frequency contactors in parallel, the power frequency contactor set is formed by connecting two power frequency contactors in parallel, the thermal relay protector set is formed by connecting two thermal relay protectors in parallel, the motor is simultaneously connected with the variable frequency contactor and the thermal relay protector in series, and the thermal relay protector is connected with the power frequency contactor in series. The beneficial effects of the utility model reside in that: the use is flexible, various process requirements are met, different operation modes are selected according to different conditions, and early-stage investment is reduced.
Description
Technical Field
The utility model relates to a control system's technical field especially relates to a take two Variable Frequency Speed Governing (VFSG) multi-functional control system.
Background
At present, in industrial production, two motors are often used and used in one application place, such as a water circulation system, a sewage discharge system, a flue gas discharge system and the like. In practice, a single motor is usually started to operate at power frequency through a soft starter or a frequency converter in a voltage reduction mode. When the motor is stopped due to a fault, the standby motor is automatically put into operation so as not to influence production and use. The process needs to fully consider the power of the whole system and the selection of the motor at the beginning of design so as to ensure that a single motor can bear the full-load operation of the whole system, and if the power of the motor is not enough, the whole system cannot meet the process requirement; and the other is that each motor is provided with a frequency converter, and the output power of the motor is automatically regulated through the frequency converter according to the power requirements of the system (such as pipeline pressure and system set temperature). The power of the motor selected by the application mode is not as accurate as that of the process, the power of the frequency converter and the motor selected can be properly increased, and the process has the defect of higher early investment.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a take two Variable Frequency Speed Governing (VFSG) multi-function control systems to solve above-mentioned technical problem.
The utility model provides a take two Variable Frequency Speed Governing (VFSG) multifunctional control systems, its structure is: the system comprises a main circuit breaker, a control power supply, a PLC (programmable logic controller), a frequency conversion loop, a power frequency loop and a motor; the main circuit breaker is connected with a control power supply, a frequency conversion loop and a power frequency loop, the control power supply is connected with a touch screen and a PLC (programmable logic controller), the touch screen is connected with the PLC in series, and the frequency conversion loop is connected with the power frequency loop in parallel; the frequency conversion loop is formed by connecting a frequency converter and a frequency conversion contactor group in series; the power frequency circuit is established ties by power frequency contactor group and thermal relay protector group and is constituted, frequency conversion contactor group is parallelly connected each other by two frequency conversion contactors and is constituteed, power frequency contactor group is parallelly connected by two power frequency contactors and is constituteed, thermal relay protector group is parallelly connected by two thermal relay protector and is constituteed, a frequency conversion contactor and a thermal relay protector are established ties simultaneously to the motor, a power frequency contactor is established ties to a thermal relay protector.
The motor includes 1 motor and 2 motors.
The frequency conversion loop and the power frequency loop are electrically isolated through the frequency conversion contactor and the power frequency contactor, the normally-open point of the frequency converter is connected into the PLC through the secondary loop, and the PLC is used for realizing control and electrical interlocking.
The utility model discloses a use method does: the system has two operation modes: one mode, dual mode.
A mode: the motor is mainly applied to the low-load condition, the No. 1 motor can be selected as the main motor and the No. 2 motor is standby in the mode, or the No. 2 motor is the main motor and the No. 1 motor is standby. When the main motor is in overload protection, the standby motor is automatically started.
Dual-purpose mode: under the mainly applied to high load condition, when dropping into No. 1 motor under this mode, the converter starts No. 1 motor to power frequency state in 30 seconds as the soft start media, catches the module through the electric wire netting wave form and compares motor and electric wire netting power frequency wave form to intervene and finely tune converter output frequency, make converter output wave form unanimous with the electric wire netting power frequency, when the wave form is unanimous, throw off frequency conversion control with No. 1 motor in the twinkling of an eye, and automatic switch power frequency return circuit. And then putting the No. 2 motor into variable frequency control operation.
The user can manually select any one of the operation modes and can also automatically operate through the controller. When the system automatically runs, the system collects actual parameters by means of an external sensor and compares the actual parameters with set parameters, and the system automatically selects a running mode and controls the output power of the frequency converter through PID regulation. Such as: in a water circulation system, when the set pipeline pressure is 1MPa, the actual monitoring pressure is 0.5MPa, at the moment, if the motor is operated in a one-use mode, the system improves the frequency conversion output power through PID regulation, if the highest power output power is reached and the set pressure can not be met, the system is automatically switched into a two-use mode, one motor is switched into power frequency operation, the other generation of frequency conversion is started, and the output power is gradually increased until the set pressure value.
The beneficial effects of the utility model reside in that: the use is flexible, various process requirements are met, different operation modes are selected according to different conditions, and early-stage investment is reduced.
Drawings
FIG. 1 is a connection diagram of the system components of the present invention;
FIG. 2 is an electrical schematic of the main circuit;
in the figure: 1. main circuit breaker, 2, control power supply, 3, touch-sensitive screen, 4, PLC controller, 5, converter, 6, frequency conversion contactor No. 1, 7, frequency conversion contactor No. 2, 8, no. 1 power frequency contactor, 9, no. 2 power frequency contactor, 10, no. 1 thermal relay protector, 11, no. 2 thermal relay protector, 12, no. 1 motor, 13, no. 2 motor.
Detailed Description
Example 1
As shown in fig. 1-2, the utility model provides a take two Variable Frequency Speed Governing (VFSG) multi-functional control system, its structure is: the device comprises a main circuit breaker 1, a control power supply 2, a PLC 4, a frequency conversion loop, a power frequency loop and a motor; the main circuit breaker 1 is connected with a control power supply 2, a frequency conversion loop and a power frequency loop, the control power supply 2 is connected with a touch screen 3 and a PLC (programmable logic controller) 4, the touch screen 3 and the PLC 4 are connected in series, and the frequency conversion loop and the power frequency loop are connected in parallel; the frequency conversion loop is formed by connecting a frequency converter 5 and a frequency conversion contactor group in series; the power frequency circuit is formed by connecting a power frequency contactor group and a thermal relay protector group in series, the frequency conversion contactor group is formed by connecting a No. 1 frequency conversion contactor 6 and a No. 2 frequency conversion contactor 7 in parallel, the power frequency contactor group is formed by connecting a No. 1 power frequency contactor 8 and a No. 2 power frequency contactor 9 in parallel, the thermal relay protector group is formed by connecting a No. 1 thermal relay protector 10 and a No. 2 thermal relay protector 11 in parallel, the No. 1 motor 12 is simultaneously connected with the No. 1 frequency conversion contactor 6 and the No. 1 thermal relay protector 10 in series, and the No. 1 thermal relay protector 10 is connected with the No. 1 power frequency contactor 8 in series; no. 2 motor 13 is established ties 2 variable frequency contactor 7 and No. 2 thermal relay protector 11 simultaneously, no. 2 thermal relay protector 11 establishes ties 2 power frequency contactor 9.
The frequency conversion loop and the power frequency loop are electrically isolated through the frequency conversion contactor and the power frequency contactor, the normally-open point of the frequency converter is connected into the PLC through the secondary loop, and the PLC is used for realizing control and electrical interlocking.
The utility model discloses a use method does: the system has two operation modes: one-use mode, two-use mode.
A mode: the motor is mainly applied to the low-load condition, the No. 1 motor can be selected as the main motor and the No. 2 motor is standby in the mode, or the No. 2 motor is the main motor and the No. 1 motor is standby. And when the main motor is subjected to overload protection, the standby motor is automatically started.
Dual-purpose mode: mainly be applied to under the high load condition, when throwing into No. 1 motor under this mode, converter 5 starts No. 1 motor to power frequency state 6-2 in 30 seconds as the soft start medium, catches module 6-3 through the electric wire netting wave form and compares No. 1 motor and electric wire netting power frequency wave form, and intervene and finely tune converter 5 output frequency, make converter 5 output wave form unanimous with the electric wire netting power frequency, when the wave form is unanimous, throw off frequency conversion control with No. 1 motor in the twinkling of an eye, and automatic switch power frequency return circuit 6-1. And then, putting the No. 2 motor into a variable frequency control 6-4 to operate.
The user can manually select any one of the operation modes and can also automatically operate through the controller. When the system automatically operates, the system acquires actual parameters by means of an external sensor and compares the actual parameters with set parameters, and automatically selects an operation mode and controls the output power of the frequency converter through PID regulation. Such as: in a water circulation system, when the set pipeline pressure is 1MPa, the actual monitoring pressure is 0.5MPa, at the moment, if a motor is operated in a one-use mode, the system improves the frequency conversion output power through PID (proportion integration differentiation) regulation, if the highest power output power is reached and the set pressure can not be met, the system is automatically switched into a two-use mode, one motor is switched into power frequency operation, the other generation of frequency conversion is started, and the output power is gradually increased until the set pressure value.
Claims (3)
1. A take two frequency conversion speed governing multifunctional control system which characterized in that: the system comprises a main circuit breaker, a control power supply, a PLC (programmable logic controller), a frequency conversion loop, a power frequency loop and a motor; the main circuit breaker is connected with a control power supply, a frequency conversion loop and a power frequency loop, the control power supply is connected with a touch screen and a PLC (programmable logic controller), the touch screen is connected with the PLC in series, and the frequency conversion loop is connected with the power frequency loop in parallel; the frequency conversion loop is formed by connecting a frequency converter and a frequency conversion contactor group in series; the power frequency circuit is established ties by power frequency contactor group and thermal relay protector group and is constituted, frequency conversion contactor group is parallelly connected each other by two frequency conversion contactors and is constituteed, power frequency contactor group is parallelly connected by two power frequency contactors and is constituteed, thermal relay protector group is parallelly connected by two thermal relay protector and is constituteed, a frequency conversion contactor and a thermal relay protector are established ties simultaneously to the motor, a power frequency contactor is established ties to a thermal relay protector.
2. The multifunctional control system with two frequency conversion speed regulation according to claim 1, characterized in that: the motor includes motor No. 1 and motor No. 2.
3. The multifunctional control system with two frequency conversion speed regulation according to claim 1, characterized in that: the frequency conversion loop and the power frequency loop are electrically isolated through the frequency conversion contactor and the power frequency contactor, a normally open point of the frequency converter is connected into the PLC through the secondary loop, and control and electrical interlocking are achieved through the PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221078797.3U CN217643195U (en) | 2022-05-07 | 2022-05-07 | Multifunctional control system with two-band frequency control and speed regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221078797.3U CN217643195U (en) | 2022-05-07 | 2022-05-07 | Multifunctional control system with two-band frequency control and speed regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217643195U true CN217643195U (en) | 2022-10-21 |
Family
ID=83650353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221078797.3U Active CN217643195U (en) | 2022-05-07 | 2022-05-07 | Multifunctional control system with two-band frequency control and speed regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217643195U (en) |
-
2022
- 2022-05-07 CN CN202221078797.3U patent/CN217643195U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106655478B (en) | Low-voltage emergency safety power supply system of household garbage power plant and control method thereof | |
| CN203056682U (en) | Power plant black-start special-purpose diesel generating set and control system thereof | |
| CN202260450U (en) | Thermal-electric plant boiler high-pressure fan online power frequency/frequency conversion operation switch device | |
| CN100451900C (en) | Intelligent control method for air compressor | |
| CN110454281B (en) | Diesel engine control method for anti-return power of emergency power station | |
| CN104578154B (en) | A kind of method of feeder low voltage crossing | |
| CN203223404U (en) | Frequency converting control system of supercritical unit induced draft fan | |
| CN201434400Y (en) | Double-frequency conversion velocity regulation control device of air preheater | |
| CN217643195U (en) | Multifunctional control system with two-band frequency control and speed regulation | |
| CN202034929U (en) | Control device capable of driving double-motor soft startup through high-voltage double frequency conversion | |
| CN110912496B (en) | Control method and device for energy storage motor of circuit breaker | |
| CN117353386A (en) | Black start system and method based on diesel generator coupled combustion engine | |
| CN201134697Y (en) | Uninterrupted power supplying standby electric generating plant | |
| CN211880319U (en) | Control device for switching motor from frequency conversion to power frequency state | |
| CN213959982U (en) | Hoist redundant power supply automatic switching system based on PLC | |
| CN113452076B (en) | Uninterrupted power operation fast switching system and method thereof | |
| CN202347041U (en) | Anti-tippling control system for iron-mixing furnace | |
| CN102420564B (en) | Intelligent bypass system for high-voltage frequency converter | |
| CN212392829U (en) | Frequency conversion and power frequency undisturbed switching system and cooling tower fan | |
| CN111338258A (en) | Control circuit and control method for low-voltage alternating-current control loop in power supply voltage abnormity | |
| CN2324681Y (en) | Fire-extingurishing electric control cabinet | |
| CN108614215B (en) | Generator performance testing device | |
| CN211670639U (en) | Diesel generating set parallel operation, parallel operation and reverse parallel operation control system | |
| CN211478924U (en) | Control circuit for low-voltage alternating-current control loop when power supply voltage is abnormal | |
| CN201946997U (en) | Automatic switching device for back-up power supply of electric generating set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |