CN206472072U - Power supply unit for intermediate frequency furnace water cooling plant - Google Patents
Power supply unit for intermediate frequency furnace water cooling plant Download PDFInfo
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- CN206472072U CN206472072U CN201720196915.3U CN201720196915U CN206472072U CN 206472072 U CN206472072 U CN 206472072U CN 201720196915 U CN201720196915 U CN 201720196915U CN 206472072 U CN206472072 U CN 206472072U
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- voltage
- power supply
- water cooling
- supply unit
- power
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Abstract
The utility model discloses a kind of power supply unit for intermediate frequency furnace water cooling plant, aim to provide a kind of power supply unit having for intermediate frequency furnace water cooling plant stable power-supplying, its drip irrigation device is to include motor, frequency converter and low voltage ride through device, the input connection power network of the low voltage ride through device, the output end connection frequency converter of low voltage ride through device, the output end connection motor of frequency converter, the input of the low voltage ride through device is also associated with providing the rotor machine of non-firm power, the rotor machine starts when power network is powered and powered off and puts into electric power on low-voltage ride-through device.
Description
Technical field
The utility model is related to intermediate frequency furnace water cooling plant technical field, the more particularly to power supply for intermediate frequency furnace water cooling plant
Equipment.
Background technology
China makes great progress in smelting, hot-working industry in recent years, and the demand for intermediate frequency furnace is also both at home and abroad
Gradually increase.The intermediate frequency furnace manufacture of China and production technology are also become better and better, and positive Introduced From Abroad studies knowledge and technology, slowly
To world-class close, research and development and industrialized production with new technology, the operating power of equipment also constantly increase, and
Effectively radiating is to ensure the basis that equipment safety operation and performance are normally played.Conventional cooling system includes air-cooled, heat at present
The several ways such as pipe cooling, oil cooling and water cooling.Because water-cooling pattern radiating efficiency is high, while again may not using oil cooling institute
The pollution that brings and it is inflammable the problem of, therefore obtained increasingly being widely applied.
Cooling medium is provided with water cooling plant, cooling medium can be lost, it is necessary to keep pipe because of a small amount of extravasation or electrolysis
Interior air pressure and water pressure invariableness, the main power of such device are exported by motor running, the confession in the control system of motor
Electric equipment has that supply voltage falls or dead electricity, once such situation occurs, in the application process of water cooling plant,
Motor will be stopped, thus this equipment can not continuous firing, intermitten service easily causes the unstable of system.
Utility model content
Have in view of the deficienciess of the prior art, the purpose of this utility model is to provide for intermediate frequency furnace water cooling plant stabilization
The power supply unit of power supply.
Above-mentioned technical purpose of the present utility model technical scheme is that：One kind is used for intermediate frequency furnace water
The power supply unit of device for cooling, including motor, frequency converter and low voltage ride through device, the input of the low voltage ride through device
End connection power network, the output end connection frequency converter of low voltage ride through device, the output end connection motor of frequency converter, the low electricity
The input of pressure traversing device is also associated with providing the rotor machine of non-firm power, and the rotor machine is supplied in power network
Start when electricity is powered off and put into electric power on low-voltage ride-through device.
By above-mentioned setting, in power network power supply process, due to large power power electronic appliance load conversion moment, cause
Fall to supply voltage or dead electricity, under Voltage Drop this state, due to low voltage ride through device, it is possible to so that
Motor voltage recovers and can be with continuous service；When open circuit occurs in power supply, then rotor machine puts into operation, so as to provide temporarily
Non-firm power to motor, it is to avoid motor failure, it is possible thereby to ensure the continual and steady operation of motor.
Can be preferably as concrete scheme of the present utility model：Switching is provided with the output end of the rotor machine
Circuit, the switching circuit includes voltage detector, comparison circuit and electronic switch, and the voltage detector is to detect electricity
Net off-position, comparison circuit connects voltage detector to judge grid cut-off state, and the electronic switch connection is more electric
Road simultaneously puts into rotor machine according to the output result of comparison circuit.
By above-mentioned setting, the switching for being controlled rotor machine by switching circuit is acted, more intelligent, is reduced
Manually-operated step, so as to improve the security of operation, grid cut-off is detected in voltage detector, then comparison circuit is exported
Signal controls the electronic switch to carry out break-make control to the circuit of rotor machine.
Can be preferably as concrete scheme of the present utility model：The electronic switch include the first relay, second after
Electrical equipment, the coil of first the second relay of Control obtains electric, and the second relay is normally opened with the first normally opened contact and second
Contact, the first normally opened contact is to control the coil of the second relay to be kept as electricity, and the second normally opened contact is to control generator
Device input power supply.
By above-mentioned setting, when the first relay obtains electric so that the second relay also electric, the second relay one
Aspect is to draw oneself up to be constantly in obtain electricity condition, is on the other hand control rotor machine input power supply, so once triggering
Off-position, then can cause power supply to have rotor machine offer, after waiting power network to repair.
Can be preferably as concrete scheme of the present utility model：Voltage compensating circuit is also associated with the frequency converter,
The voltage compensating circuit includes toggle switch and the compensation input of multiple different offset voltages, and the toggle switch is to select
The one of input that compensates of the connection of selecting property is to frequency converter.
By above-mentioned setting, because frequency converter can play control action to the speed governing of motor, for the power supply of frequency converter
It can also carry out the different voltage class of selection by toggle switch to compensate electric power in input.
Can be preferably as concrete scheme of the present utility model：The low voltage ride through device includes the work(being sequentially connected
Rate module, boost module, energy-storage module.
By above-mentioned setting, when voltage is reduced, the voltage on power model is reduced, energy-storage module and boost module
Interaction so that voltage recovery, so as to reduce the influence that low-voltage is brought.
Can be preferably as concrete scheme of the present utility model：The low voltage ride through device also includes current detecting
Device, current detector connection ammeter.
By above-mentioned setting, the size of current detected can be intuitively shown.
Can be preferably as concrete scheme of the present utility model：Voltmeter is also associated with the voltage detector.
By above-mentioned setting, the voltage swing detected can be intuitively shown.
In summary, the utility model has the advantages that：Under Voltage Drop this state so that motor voltage
Recover and can be with continuous service；When open circuit occurs in power supply, it is to avoid motor failure, it is possible thereby to ensure the continual and steady of motor
Operation, improves intelligence degree.
Brief description of the drawings
Fig. 1 is the low voltage ride through device circuit diagram of the present embodiment；
Fig. 2 is the circuit diagram of the electronic switch of the present embodiment；
Fig. 3 is the circuit connection diagram of the toggle switch of the present embodiment.
1, frequency converter in figure；2nd, low voltage ride through device；21st, power model；22nd, boost module；23rd, energy-storage module；3、
Switching circuit；31st, voltage detector；32nd, comparison circuit；33rd, electronic switch；K1, the first relay；K2, the second relay；4、
Voltage compensating circuit；SW, toggle switch；5th, current detector；6th, ammeter；7th, voltmeter；M1, motor；M2, generator dress
Put.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment：
A kind of power supply unit for intermediate frequency furnace water cooling plant, as shown in figure 1, including motor M1, frequency converter 1 and low
Voltage ride-through device 2.Low voltage ride through device 2 also includes current detector 5, the connection ammeter 6 of current detector 5.Voltage is examined
Survey on device 31 and be also associated with voltmeter 7.The electric current and voltage swing detected can intuitively be shown.Low voltage ride through device 2
Input connection power network, low voltage ride through device 2 output end connection frequency converter 1, frequency converter 1 output end connection motor
M1.Low voltage ride through device 2 includes power model 21, boost module 22, the energy-storage module 23 being sequentially connected.Three-phase alternating current leads to
The rectification of overpower module 21, is converted to direct current, and is boosted by boost module 22, and boost module 22 uses existing
Boost chopper, realized with IPM devices, electric energy part is stored on energy-storage module 23, and energy-storage module 23 is mainly
Realized using big capacitor and some resistance devices.When line voltage is normal, frequency converter 1 passes through itself AC electric energy
Motor M1 work is maintained, when line voltage declines, booster circuit can put into operation so that frequency converter 1 has stable
Voltage source, so that motor M1 can be with stable operation.
As depicted in figs. 1 and 2, the input of low voltage ride through device 2 is also associated with providing the generating of non-firm power
Switching circuit 3 is provided with machine device M2, rotor machine M2 output end, switching circuit 3 includes voltage detector 31, compared
Circuit 32 and electronic switch 33.Voltage detector 31 can be Hall sensor.Comparison circuit 32 is as shown in Fig. 2 its is main
Including comparator LM1 and peripheral circuit component.The signal UM of voltage detector 31 is input to rate of exchange device LM1 anti-phase input
End, comparator LM1 in-phase input end receives reference signal Vref1.When the voltage of voltage detector 31 is reduced to reference signal
During below Vref1, comparator LM1 output high level.
Electronic switch 33 mainly includes triode Q1, resistance R1, R2, the first relay K1, the second relay K2, first after
Electrical equipment K1 controls the second relay K2 coil to obtain electric, and the second relay K2 has the first normally opened contact K2-1 and second is normally opened to touch
Point K2-2, the first normally opened contact K2-1 are to control the second relay K2 coil to be kept as electricity, and the second normally opened contact K2-2 is used
To control rotor machine M2 input power supplies.When the first relay K1 obtains electric so that the second relay K2 also it is electric,
On the one hand two relay K2 are to draw oneself up to be constantly in obtain electricity condition, are on the other hand that control rotor machine M2 inputs are supplied
Electricity, so once triggering off-position, then can cause power supply to have rotor machine M2 offers, after waiting power network to repair.
Voltage detector 31 is to detect grid cut-off state, and comparison circuit 32 connects voltage detector 31 to judge electricity
Net off-position, the connection comparison circuit 32 of electronic switch 33 simultaneously puts into rotor machine according to the output result of comparison circuit 32
M2.Rotor machine M2 starts when power network is powered and powered off and puts into electric power on low-voltage ride-through device.
As shown in figure 3, being also associated with voltage compensating circuit 4 on frequency converter 1, voltage compensating circuit 4 includes toggle switch SW
With the compensation input of multiple different offset voltages, compensation input can be voltage end V1, V2, V3, V4 respectively in figure 3.
It can be multiple magnitudes of voltage, can be provided by external power source.Connection one of benefits of the toggle switch SW to selectivity
Input is repaid to frequency converter 1.It is defeated for the power supply of frequency converter 1 because frequency converter 1 can play control action to the speed governing of motor
It can also carry out the different voltage class of selection by toggle switch SW to compensate electric power on entering.
The course of work：In power network power supply process, due to large power power electronic appliance load conversion moment, cause to confession
Piezoelectric voltage is fallen or dead electricity.Under this state of Voltage Drop, due to low voltage ride through device 2, it is possible to so that
Motor M1 voltages recover and can be with continuous services.
When open circuit occurs in power supply, voltage detector 31 causes on-off circuit to act by comparison circuit 32.Second relay
K2 the second normally opened contact K2-2 closures, then rotor machine M2 puts into operation, so as to provide temporary transient non-firm power to electronic
Machine M1, it is to avoid motor M1 is shut down, it is possible thereby to ensure motor M1 continual and steady operation.
When the undertension of the power end of frequency converter 1, then by adjusting toggle switch SW, corresponding magnitude of voltage is selected to carry out
Voltage compensation.
This specific embodiment is only to explain of the present utility model, and it is not to limitation of the present utility model, ability
Field technique personnel can make the modification without creative contribution to the present embodiment as needed after this specification is read, but
As long as all being protected in right of the present utility model by Patent Law.
Claims (7)
1. a kind of power supply unit for intermediate frequency furnace water cooling plant, including motor (M1), frequency converter (1) and low voltage crossing
Device (2), it is characterised in that：The input connection power network of the low voltage ride through device (2), low voltage ride through device (2)
Output end connection frequency converter (1), frequency converter (1) output end connection motor (M1), the low voltage ride through device (2) it is defeated
Enter end and be also associated with providing the rotor machine (M2) of non-firm power, the rotor machine (M2) is powered appearance in power network
Start during power-off and put into electric power on low-voltage ride-through device.
2. the power supply unit according to claim 1 for intermediate frequency furnace water cooling plant, it is characterised in that：The generator dress
Switching circuit (3) is provided with the output end for putting (M2), the switching circuit (3) includes voltage detector (31), comparison circuit
(32) and electronic switch (33), the voltage detector (31) is to detect grid cut-off state, comparison circuit (32) connection
Voltage detector (31) is to judge grid cut-off state, electronic switch (33) the connection comparison circuit (32) and according to comparing
The output result of circuit (32) puts into rotor machine (M2).
3. the power supply unit according to claim 2 for intermediate frequency furnace water cooling plant, it is characterised in that：The electronic switch
(33) the first relay (K1), the second relay (K2) are included, the first relay (K1) controls the coil of the second relay (K2)
It is electric, the second relay (K2) have the first normally opened contact and the second normally opened contact, the first normally opened contact to control second after
The coil of electrical equipment (K2) is kept as electricity, and the second normally opened contact is to control rotor machine (M2) input power supply.
4. the power supply unit according to claim 1 for intermediate frequency furnace water cooling plant, it is characterised in that：The frequency converter
(1) voltage compensating circuit (4) is also associated with, the voltage compensating circuit (4) includes toggle switch (SW) and multiple different benefits
The compensation input of voltage is repaid, the toggle switch (SW) is to one of those compensation input of the connection of selectivity to frequency conversion
Device (1).
5. the power supply unit according to claim 1 for intermediate frequency furnace water cooling plant, it is characterised in that：The low-voltage is worn
More device (2) includes power model (21), boost module (22), the energy-storage module (23) being sequentially connected.
6. the power supply unit according to claim 5 for intermediate frequency furnace water cooling plant, it is characterised in that：The low-voltage is worn
More device (2) also includes current detector (5), current detector (5) connection ammeter (6).
7. the power supply unit according to claim 2 for intermediate frequency furnace water cooling plant, it is characterised in that：The voltage detecting
Voltmeter (7) is also associated with device (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720196915.3U CN206472072U (en) | 2017-03-02 | 2017-03-02 | Power supply unit for intermediate frequency furnace water cooling plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720196915.3U CN206472072U (en) | 2017-03-02 | 2017-03-02 | Power supply unit for intermediate frequency furnace water cooling plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206472072U true CN206472072U (en) | 2017-09-05 |
Family
ID=59713308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720196915.3U Expired - Fee Related CN206472072U (en) | 2017-03-02 | 2017-03-02 | Power supply unit for intermediate frequency furnace water cooling plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206472072U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390125A (en) * | 2017-09-05 | 2017-11-24 | 云南电网有限责任公司电力科学研究院 | A kind of system for being used to start wind-driven generator low-voltage crossing experimental rig |
-
2017
- 2017-03-02 CN CN201720196915.3U patent/CN206472072U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390125A (en) * | 2017-09-05 | 2017-11-24 | 云南电网有限责任公司电力科学研究院 | A kind of system for being used to start wind-driven generator low-voltage crossing experimental rig |
| CN107390125B (en) * | 2017-09-05 | 2023-11-17 | 云南电网有限责任公司电力科学研究院 | System for starting low-voltage ride through test device of wind driven generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170905 |