CN205992860U - converter and control unit thereof - Google Patents
converter and control unit thereof Download PDFInfo
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- CN205992860U CN205992860U CN201620868514.3U CN201620868514U CN205992860U CN 205992860 U CN205992860 U CN 205992860U CN 201620868514 U CN201620868514 U CN 201620868514U CN 205992860 U CN205992860 U CN 205992860U
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- bus
- power supply
- control module
- inverter
- voltage
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- 238000000034 method Methods 0.000 claims abstract description 9
- 239000003054 catalyst Substances 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract description 4
- 230000000007 visual effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The utility model provides a transverter and control unit thereof. The control unit of the converter comprises: the device comprises a control module, a rectifying side voltage/current sensor, a first power supply and a second power supply; the rectifying side voltage/current sensor is used for detecting the voltage or the current of a rectifying part of the converter; the first power supply is used for supplying power to the control module when the converter works normally; the second power supply is used for supplying power to the control module when the converter is powered off; and the control module judges the power failure of the converter according to the voltage or current detected by the rectifying side voltage/current sensor, and switches the power supply of the converter from the first power supply to the second power supply. When the current converter works normally, the discharging circuit is not connected, and the system reliability is improved. And furthermore, through increasing the discharge indicator lamp, the indicator lamp is lighted when the discharge circuit works, and the indicator lamp is extinguished after the discharge is finished, so that the discharge process is more visual.
Description
Technical field
This utility model is related to electron electric power technical field, more particularly, to a kind of inverter and its control unit.
Background technology
The main topology of high-power frequency conversion centrifugal chiller inverter generally adopts " AC-DC-AC " structure.Alternating current inputs,
DC potential is set up by rectifying part, is larger electric capacity to be accessed on dc bus for energy storage, its main body in intermediate link
Structure is as shown in Figure 1.
Wherein, inverter operationally, dc bus establishes higher voltage, the described direct current when inverter is shut down
Residual voltage on bus need to discharge through discharge circuit, otherwise there will be potential safety hazard.As shown in figure 1, its scheme of adopting
It is to be directly accessed bleeder resistance at dc bus two ends to realize this function.However, so then making whether under which kind of state,
As long as voltage is had on dc bus, on bleeder resistance will consumed energy, thus causing energy dissipation, and described bleeder resistance
Heating can make inverter inside temperature raise.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of inverter and its control unit, to reduce energy expenditure.
According to of the present utility model in a first aspect, providing a kind of control unit of inverter, including：
Control module, rectification side voltage/current sensor, the first power supply and second source；
Described rectification side voltage/current sensor is used for detecting the voltage of rectifying part or the electric current of inverter；
Described first power supply, for powering for described control module in described inverter normal work；
Described second source, for powering for described control module in described inverter power down；And
Voltage or electric current that described control module detects according to described rectification side voltage/current sensor, judge described
Inverter power down, its power supply is switched to second source from described first power supply by described control module.
Further, described first power supply is the Switching Power Supply being connected between dc bus；And/or described second source
It is the UPS being connected with alternating current source.
Further, described control module includes controller and catalyst；
The voltage being collected by rectification side voltage/current sensor when described controller or current signal, judge to change
Flow device power down, then described controller controls described catalyst so that the normally-closed contact of catalyst disconnects, and normally opened contact closure,
Thus described power supply is switched to second source from described first power supply.
Further, in described inverter power down, described control module sends pulse signal, drives the DC/ of inverter
AC circuit, makes pipe and the conducting of another brachium pontis down tube on one of any two brachium pontis of described DC/AC circuit brachium pontis, thus
Machine winding is connected in the discharge circuit of inverter, for discharging to the residual charge of dc bus.
Further, for driving the described pulse signal of described DC/AC circuit, it is high level signal or pwm signal.
Further, described control unit also includes DC bus-bar voltage sensor, for detecting between two dc bus
Voltage；And
The voltage that described control module detects according to DC bus-bar voltage sensor, controls its power supply from second
Power supply is switched to the first power supply.
Further, described control unit also includes DC bus-bar voltage sensor, for detecting between two dc bus
Voltage；And
The voltage that described control module detects according to DC bus-bar voltage sensor, controls its power supply from second
Power supply is switched to the first power supply.
Further, the voltage being detected by this DC bus-bar voltage sensor when control module, judges dc bus
At the end of residual charge electric discharge, control module output control signal, make the coil power down of described catalyst, then catalyst is normally opened
Contact disconnects, and normally-closed contact closes, thus the described power supply of control module is switched to the first power supply by second source.
Further, described control module also includes contactor coil display lamp, for lighting when discharge circuit discharges,
Thus indicating discharge process.
According to second aspect of the present utility model, provide a kind of inverter, including：
Circuit part, described circuit part include by from alternating current source convert alternating current be galvanic rectifying part,
The discharge circuit dc bus of two outfans being connected to rectifying part being discharged in inverter power down and general are straight
Stream electricity is transformed to the Converting Unit of alternating current；And
Control unit as described in any of the above-described.
Further, described discharge circuit includes the bus capacitor being connected between described dc bus, puts for storage
Electric energy in electric process.
According to scheme of the present utility model, shut down by detecting the power down of inverter, the electric discharge to inverter is controlled
And instruction, realize dc bus remnants discharge of electricity function when inverter is shut down controlled.Specifically, access when inverter is shut down and put
Circuit, with the residual charge on dc bus of releasing in time；And discharge circuit does not access when inverter normal work, one
Aspect reduces unnecessary loss, inverter inside temperature on the other hand will not be made to raise, improve system reliability.And enter one
Step ground, by increasing discharge indicating lamp, lights display lamp when discharge circuit works, and extinguishes display lamp after the completion of electric discharge, thus
Make discharge process more directly perceived.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and being practiced according to the content of description, below with preferred embodiment of the present utility model and coordinate accompanying drawing detailed
Describe in detail bright as after.
Brief description
The accompanying drawing constituting a part of the present utility model is used for providing further understanding to of the present utility model, and this practicality is new
The schematic description and description of type is used for explaining this utility model, does not constitute to improper restriction of the present utility model.?
In accompanying drawing：
Fig. 1 shows the inverter of prior art and its structural representation of control circuit.
Fig. 2 is the structural representation of inverter according to this utility model one preferred embodiment and its control unit.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, concrete below in conjunction with this utility model
Embodiment and corresponding accompanying drawing are clearly and completely described to technical solutions of the utility model.Obviously, described embodiment
It is only a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, this area
The every other embodiment that those of ordinary skill is obtained under the premise of not making creative work, broadly falls into this utility model
The scope of protection.
Combine Fig. 2 first and inverter of the present utility model and its control unit are described.Fig. 2 shows according to this utility model
The inverter of the inclusion control unit of one preferred implementation.As shown in Fig. 2 described inverter includes circuit part 1 and control
Unit 2 processed.Described circuit part include by from alternating current source convert alternating current be galvanic rectifying part 11, in inverter
The discharge circuit 12 that during stopping, the dc bus 14 of two outfans being connected to rectifying part 11 discharged and by direct current
Electricity is transformed to the Converting Unit 13 of alternating current.Described discharge circuit 12 includes the bus electricity being connected between described dc bus 14
Hold 121.Described bus capacitor 121 is used for storing the electric energy in discharge process.
Described control unit 2 includes control module 21, rectification side voltage/current sensor 22, the first power supply 23, Yi Ji
Two power supplys 24.Described rectification side voltage/current sensor 22 is used for detecting voltage or the electric current of rectifying part.Described first power supply
23 and second source 24 be used to power for described control module 21.Wherein, one end of the first power supply 23 and two dc bus connect
Connect, for powering for described control module 21 when described inverter works, and be preferably Switching Power Supply.Described second source 24
It is preferably uninterrupted power source UPS (the Uninterruptible Power System/ that one end is connected with described alternating current source
Uninterruptible Power Supply).Certainly, described second source 24 also can be selected for other accumulation power supplies, in inversion
Power to control module 21 during device power down.Described control module 21 detects according to described rectification side voltage/current sensor 22
Voltage or electric current, judge that inverter is shut down, its power supply is switched to second source from the first power supply by control module 21, with
Dc bus is discharged.
Specifically, in a preferred embodiment, described control module 21 includes, using the teaching of the invention it is possible to provide pwm signal is simultaneously believed to sampling
Number controller being processed, specially such as variable frequency drive controller, catalyst 211 etc..Feelings in inverter normal work
Under condition, control module 21 from dc bus 14 through the first power supply 23, such as Switching Power Supply power taking, after electricity on inverter, direct current
Bus 14 sets up potential, and after potential reaches the startup voltage of control module 21, control module 21 is started working.Now, change
Stream device normally starts.And, when inverter normal work, power dragging loaded work piece to motor, now, due to discharge circuit
Do not access, then on the one hand reduce unnecessary loss, on the other hand will not make inverter inside temperature raise, improve system can
By property.
When inverter power down, dc bus 14 both end voltage sufficiently large so that control module 21 and rectification side voltage/electricity
Flow sensor 22 can not possibly quit work immediately.Now, control module 21 is collected by rectification side voltage/current sensor 22
Voltage or current signal, judge inverter power down.Described variable frequency drive controller 212 control contactor is so that it is powered
Power supply is switched to UPS from Switching Power Supply 23.Specifically, described variable frequency drive controller 212 sends control signal and makes catalyst
211 coil obtain electric so that normally-closed contact K1 disconnect, normally opened contact K2 close, will power supply switch from Switching Power Supply 23
To UPS 24, described variable frequency drive controller 212 is made to have stable power supply.Wherein, UPS in inverter power down to change
Frequency drive control device 212 is powered, and can be charged during inverter normal work.
Further, the Converting Unit of the circuit part of described inverter is DC/AC circuit, controls phase in DC/AC circuit
The switching tube answered, makes dc-link capacitance, switching tube, machine winding constitute path, thus forming discharge loop.Concrete at one
In embodiment, described DC/AC circuit is preferably bridge inverter main circuit, three-phase inverter bridge circuit for example, as shown in Figure 2.?
When inverter is shut down because of power down, variable frequency drive controller 212 sends pulse signal, drives described bridge inverter main circuit, makes institute
State pipe and another brachium pontis down tube on or off on one of any two brachium pontis of bridge inverter main circuit brachium pontis, so that
Machine winding is connected in described discharge circuit, for discharging to the residual charge of dc bus, such as by institute in Fig. 2
Show path or the path being made up of UP and WN or the path being made up of VP and WN of UP and VN composition, etc..For driving
Move the described pulse signal of described bridge inverter main circuit, high level signal or pwm signal can be selected.Described pulse signal is high
During level, then switching tube is in the conduction state, if described pulse signal takes pwm signal, switching tube is on, turns off back and forth
The state of switching.And, when selecting high level signal, the remaining discharge of electricity speed on dc bus 14 is fast, but because motor
Winding direct impedance is less big, overcurrent protection easily.When selecting pwm signal, the residual charge on dc bus 14 is put
Electric speed is than selecting high level signal as slightly slow during described pulse signal, but more reliable, safety.
Further, described control unit 2 also includes DC bus-bar voltage sensor 26, for detect two dc bus it
Between voltage.The voltage that described control module 21 detects according to DC bus-bar voltage sensor 26 control by its power supply from
Second source is switched to the first power supply.Specifically, the electricity being detected by this DC bus-bar voltage sensor when control module 21
Pressure, at the end of judging the electric discharge of dc bus 14 residual charge, control module 21 output control signal, make the coil of catalyst 211
Power down, then catalyst 211 normally opened contact K2 disconnect, normally-closed contact K1 close, so, by control module 21 power supply by
UPS switches to Switching Power Supply.
It is further preferred that described control module 21 also includes contactor coil display lamp, when inverter is shut down, pass through
Variable frequency drive controller is realized dc bus residual charge and is completed to discharge through machine winding, lights display lamp instruction simultaneously and discharged
Journey, until electric discharge completes, display lamp extinguishes.
Above inverter of the present utility model and its control unit are described.According to scheme of the present utility model,
Shut down by detecting the power down of inverter, the electric discharge to inverter is controlled and indicates, realize direct current when inverter is shut down female
Line residual charge discharging function is controlled.Specifically, access discharge circuit when inverter is shut down, with dc bus of releasing in time
On residual charge；And discharge circuit does not access when inverter normal work, on the one hand reduce unnecessary loss, the opposing party
Face will not make inverter inside temperature raise, and improves system reliability.And further, by increasing discharge indicating lamp,
Light display lamp during discharge circuit work, extinguish display lamp after the completion of electric discharge, so that discharge process is more directly perceived.
It should be noted that in the case of not conflicting, the embodiment in this utility model and the feature in embodiment can
To be mutually combined.
The above, be only preferred embodiment of the present utility model, not this utility model is made any formal
Restriction, any simple modification, equivalent variations and modification above example made according to technical spirit of the present utility model,
All still fall within the range of technical solutions of the utility model.
Claims (13)
1. a kind of control unit of inverter is it is characterised in that include：
Control module, rectification side voltage/current sensor, the first power supply and second source；
Described rectification side voltage/current sensor is used for detecting the voltage of rectifying part or the electric current of inverter；
Described first power supply, for powering for described control module in described inverter normal work；
Described second source, for powering for described control module in described inverter power down；And
Voltage or electric current that described control module detects according to described rectification side voltage/current sensor, judge the described change of current
Device power down, its power supply is switched to second source from described first power supply by described control module, with the direct current to inverter
Bus is discharged.
2. control unit as claimed in claim 1 it is characterised in that
Described first power supply is the Switching Power Supply being connected between dc bus；And/or described second source be and alternating current source even
The UPS connecing.
3. control unit as claimed in claim 1 or 2 it is characterised in that
Described control module includes controller and catalyst；
The voltage being collected by rectification side voltage/current sensor when described controller or current signal, judge inverter
Power down, then described controller control described catalyst so that the normally-closed contact of catalyst disconnects, and normally opened contact closure, thus
Described power supply is switched to second source from described first power supply, is discharged with the dc bus to inverter.
4. control unit as claimed in claim 1 it is characterised in that
In described inverter power down, described control module sends pulse signal, drives the DC/AC circuit of inverter, makes described
In DC/AC circuit, corresponding switching tube, bus capacitor and machine winding constitute path, thus forming discharge loop, with to straight
The residual charge of stream bus is discharged.
5. control unit as claimed in claim 4 is it is characterised in that wherein,
Described DC/AC circuit is bridge inverter main circuit, and described control module sends pulse signal, drives described bridge type inverse electricity
Road, makes pipe and the conducting of another brachium pontis down tube or pass on one of any two brachium pontis of described bridge inverter main circuit brachium pontis
Disconnected, that is, in described bridge inverter main circuit, corresponding switching tube, bus capacitor and machine winding constitute path, thus composition is put
The electric loop is discharged with the residual charge to dc bus.
6. control unit as claimed in claim 4 it is characterised in that
For driving the described pulse signal of described DC/AC circuit, it is high level signal or pwm signal.
7. the control unit as described in any one of claim 1-2,4-6 it is characterised in that
Described control unit also includes DC bus-bar voltage sensor, for detecting the voltage between two dc bus；And
The voltage that described control module detects according to DC bus-bar voltage sensor, controls its power supply from second source
It is switched to the first power supply.
8. control unit as claimed in claim 3 it is characterised in that
Described control unit also includes DC bus-bar voltage sensor, for detecting the voltage between two dc bus；And
The voltage that described control module detects according to DC bus-bar voltage sensor, controls its power supply from second source
It is switched to the first power supply.
9. control unit as claimed in claim 8 it is characterised in that
The voltage being detected by this DC bus-bar voltage sensor when control module, judges dc bus residual charge electric discharge knot
Shu Shi, control module output control signal, make the coil power down of described catalyst, then the normally opened contact of catalyst disconnects, normally closed
The closing of contact, thus the described power supply of control module is switched to the first power supply by second source.
10. control unit as claimed in claim 3 it is characterised in that
Described control module also includes contactor coil display lamp, for lighting when discharge circuit discharges, thus indicating electric discharge
Process.
11. control units as claimed in claim 9 it is characterised in that
Described control module also includes contactor coil display lamp, for lighting when discharge circuit discharges, thus indicating electric discharge
Process.
A kind of 12. inverters are it is characterised in that include：
Circuit part, described circuit part includes the convert alternating current from alternating current source is galvanic rectifying part, is being changed
The discharge circuit that during stream device power down, the dc bus of two outfans being connected to rectifying part discharged and by unidirectional current
It is transformed to the Converting Unit of alternating current；And
Control unit as described in any one of claim 1-11.
13. inverters as claimed in claim 12 it is characterised in that
Described discharge circuit includes the bus capacitor being connected between described dc bus, for storing the electricity in discharge process
Energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620868514.3U CN205992860U (en) | 2016-08-11 | 2016-08-11 | converter and control unit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620868514.3U CN205992860U (en) | 2016-08-11 | 2016-08-11 | converter and control unit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205992860U true CN205992860U (en) | 2017-03-01 |
Family
ID=58107219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620868514.3U Expired - Fee Related CN205992860U (en) | 2016-08-11 | 2016-08-11 | converter and control unit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205992860U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301000A (en) * | 2016-08-11 | 2017-01-04 | 珠海格力电器股份有限公司 | Converter and control unit thereof |
| CN107323592A (en) * | 2017-06-21 | 2017-11-07 | 上海云驱智能科技有限公司 | Detect the electric bicycle intelligence system of heart rate and detect the electric bicycle of heart rate |
-
2016
- 2016-08-11 CN CN201620868514.3U patent/CN205992860U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301000A (en) * | 2016-08-11 | 2017-01-04 | 珠海格力电器股份有限公司 | Converter and control unit thereof |
| CN106301000B (en) * | 2016-08-11 | 2018-11-23 | 珠海格力电器股份有限公司 | converter and control unit thereof |
| CN107323592A (en) * | 2017-06-21 | 2017-11-07 | 上海云驱智能科技有限公司 | Detect the electric bicycle intelligence system of heart rate and detect the electric bicycle of heart rate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170301 Termination date: 20210811 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |