CN110071623A - Drive control circuit, air-conditioner controller and air conditioner - Google Patents
Drive control circuit, air-conditioner controller and air conditioner Download PDFInfo
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- CN110071623A CN110071623A CN201910447791.5A CN201910447791A CN110071623A CN 110071623 A CN110071623 A CN 110071623A CN 201910447791 A CN201910447791 A CN 201910447791A CN 110071623 A CN110071623 A CN 110071623A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
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Abstract
The present invention provides a kind of drive control circuit, air-conditioner controller and air conditioners.Wherein, a kind of drive control circuit includes: inverter bridge, is used for output drive signal, and inverter bridge accesses between high voltage bus and low-voltage bus bar；Reactor, for absorbing the surging signal generated during drive control circuit driving load running, reactor is accessed between power grid and load；Bus capacitor, for filtering out the surging signal in bus load, bus capacitor is accessed between high voltage bus and low-voltage bus bar；Drive control circuit further include: capacitive absorbing circuit, for absorbing the surging signal in two buss lines, capacitive absorbing circuit is in parallel with bus capacitor.The drive control circuit provided through the invention can be effectively relieved the case where bus capacitor is to surging signal absorption difference, and then promote the stability and reliability of busbar voltage.
Description
This application claims on 01 16th, 2019 submission Patent Office of the People's Republic of China, application No. is 2019100417099, invention names
The referred to as priority of the Chinese patent application of " drive control circuit, air-conditioner controller and air conditioner ", entire contents are by drawing
With being incorporated in the present application.
Technical field
The present invention relates to air conditioner technical fields, in particular to a kind of drive control circuit, a kind of airconditioning control
Device and a kind of air conditioner.
Background technique
Variable frequency air-conditioner controller largely uses AC-DC-AC (AC-DC-exchange) topological structure, structure diagram at present
As shown in Figure 1, specifically including that AC power supplies module 10 ', power filtering module 12 ', rectification module 14 ', filter module 16 ', inversion
Module 18 ' and load 20 '.
Power frequency component after needing to filter smooth stream due to filter module 16 ', so often using the electrolysis electricity of larger capacity
Hold and is used as main filter element.However, the use of electrolytic capacitor will cause THD (the Total Harmonic of input AC electric current
Distortion, total harmonic distortion) increase, and the service life shorter ultimate life for influencing controller of itself, furthermore electrolytic capacitor
Fever reduce controller efficiency.
With the promotion of cost and reliability requirement, electrolytic capacitor capacity reduction even no electrolytic capacitor control program is gradually
It is mature.For no electrolytic capacitor control program, electrolytic capacitor is generally replaced using a thin-film capacitor compared with low capacity.Due to mother
The reduction of line capacitance capacity is deteriorated for the absorbability of surge, and defect is mainly reflected in following two aspect:
One, thin-film capacitor or small electric solution capacitor are limited for surge absoption, lead to the first device of the excessively high damage of busbar voltage
Part.
Two, thin-film capacitor or small electric solution capacitor are limited for surge absoption, if input wave when model machine operates normally
Voltage is gushed, leads to busbar voltage moment acute variation, influences control stability.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, it is an aspect of the invention to propose a kind of drive control circuit.
Another aspect of the present invention is to propose a kind of controller of air conditioner.
Another aspect of the invention is to propose a kind of air conditioner.
In view of this, an aspect of of the present present invention proposes a kind of drive control circuit, comprising: inverter bridge, for driving control
Load running processed, inverter bridge access between high voltage bus and low-voltage bus bar；Reactor, for absorbing drive control circuit driving
The surging signal generated during load running, reactor access between power grid and load；Bus capacitor, for providing load
Required starting voltage is powered on, bus capacitor is also used to absorb surging signal, and bus capacitor is accessed in the mother of inverter bridge input side
In line route；Drive control circuit further include: capacitive absorbing circuit, for absorbing the surging signal in two buss lines, capacitive is inhaled
It is in parallel with bus capacitor to receive circuit.
Drive control circuit provided by the invention, electricity when surge energy is mainly derived from power input, model machine disorderly closedown
Machine winding, the inductance afterflow of alternating current-direct current side and motor kinetic energy, when surging signal comes temporarily, due to bus capacitor (such as thin-film capacitor
Or low capacity electrolytic capacitor) absorb surge capacity it is limited, busbar voltage can rapid increase, once busbar voltage be more than protection threshold
Value, may be damaged component, to protect component not by high pressure damage (predominantly first device such as intelligent power module and capacitor
Part), capacitive absorbing circuit is in parallel with bus capacitor, by capacitive absorbing circuit come the wave on auxiliary bus bar capacitive absorption bus
Signal is gushed, in this way when surging signal comes temporarily, capacitive absorbing circuit works simultaneously with bus capacitor, common to absorb surge letter
Number, as surging signal is absorbed by capacitive absorbing circuit, the voltage on bus capacitor is begun to decline, to reach stable bus
The purpose of voltage.Bus capacitor can be effectively relieved to surging signal absorption difference in the drive control circuit provided through the invention
The case where, and then promote the stability and reliability of busbar voltage.
In addition, above-mentioned drive control circuit according to the present invention, can also have the following additional technical features:
In the above-mentioned technical solutions, it is preferable that drive control circuit further include: one-way conduction element, for regulating and controlling capacitive
Absorbing circuit absorbs the process of surging signal, and one-way conduction element connects with capacitive absorbing circuit, when one-way conduction element conductive,
Capacitive absorbing circuit absorbs surging signal, and when one-way conduction element ends, capacitive absorbing circuit stops absorbing surging signal.
In the technical scheme, drive control circuit further includes one-way conduction element, and one-way conduction element and capacitive absorb
Circuit series connection uses one-way conduction element as the isolation element of capacitive absorbing circuit and bus capacitor, can limit capacitive suction
Receive absorption process of the circuit to surging signal, at low cost and high reliablity.Specifically, it is absorbed by one-way conduction element and capacitive
The surge absorbing circuit of circuit composition is no control form, when there is the surging signal for being higher than busbar voltage maximum value, is unidirectionally led
Logical element conductive, capacitive absorbing circuit work simultaneously with bus capacitor, absorb surging signal jointly.Wherein, one-way conduction member
Part is the element with one-way conduction characteristic, such as diode.
In any of the above-described technical solution, it is preferable that drive control circuit further includes switch element, is inhaled for regulating and controlling capacitive
The process that circuit absorbs surging signal is received, switch element connect with capacitive absorbing circuit, and when switching elements conductive, capacitive absorption is electric
Road absorbs surging signal, and when switch element ends, capacitive absorbing circuit stops absorbing surging signal.
In the technical scheme, use switch element as the isolation element of surge absoption capacitor and bus capacitor, composition
Surge absorbing circuit be controllable form, (such as 680V, can be according to the actual situation when current busbar voltage is greater than some fixed value
Set), switching elements conductive, surging signal can be introduced into capacitive absorbing circuit with most fast, to stablize busbar voltage；
In addition, the Absorption Capacitance of more low capacity can be used due to being controllable absorpting form, it is at low cost.Wherein, switch element
Transistor, relay etc..
In any of the above-described technical solution, it is preferable that capacitive absorbing circuit includes: the first capacitive element, for absorbing height
Press the surging signal on bus and low-voltage bus bar；First resistance element, for discharging the surging signal in the first capacitive element, the
One resistance element is in parallel with the first capacitive element.
In the technical scheme, capacitive absorbing circuit includes the first capacitive element and the first resistance element being connected in parallel,
The quantity of first capacitive element and the first resistance element is one or more.
Optionally, the quantity of the first resistance element and the quantity of the first capacitive element correspond, and the first capacitive element
In parallel with the first resistance element, when the quantity of the first capacitive element is multiple, the first resistance element plays the work of balance resistance
With, and the effect of electrolytic capacitor discharge resistance.
Optionally, the quantity of the first resistance element is multiple, after the series connection of multiple first resistance elements with the first capacitive element
It is in parallel.
In any of the above-described technical solution, it is preferable that capacitive absorbing circuit further include: the second capacitive element, for absorbing
Surging signal on high voltage bus and low-voltage bus bar, the second capacitive element are connected with the first capacitive element；Second resistance element is used
In discharging the surging signal in the second capacitive element, the second resistance element is in parallel with the second capacitive element.
In the technical scheme, capacitive absorbing circuit further includes the second capacitive element being connected in parallel and second resistive yuan
The quantity of part, the second capacitive element and the second resistance element is one or more.Wherein, the second capacitive element and the first capacitive
The capacitance of element can be the same or different, it is preferable that the first resistance element is identical as the resistance value of the second resistance element, with flat
Weigh the voltage of the first capacitive element and the second capacitive element, and the effect of electrolytic capacitor discharge resistance.
In any of the above-described technical solution, it is preferable that drive control circuit further include: third resistance element, for limiting
The electric current of capacitive absorbing circuit is flowed through, third resistance element is connected with capacitive absorbing circuit.
In the technical scheme, drive control circuit further includes third resistance element, by third resistance element to flowing through
The electric current of capacitive absorbing circuit carries out current limliting.Wherein, different from the capacitance of the second capacitive element according to the first capacitive element, third
Resistance element selection is also different.
In any of the above-described technical solution, it is preferable that third resistance element includes: one or more resistance, Duo Ge electricity
Series connection and/or parallel connection between resistance.
In any of the above-described technical solution, it is preferable that drive control circuit further include: control circuit, with switch element phase
Connection, control circuit are used to detect the power supply signal of drive control circuit, and according to power supply signal control switch element conductive or
Cut-off；Wherein, power supply signal includes bus signal and/or AC signal.
In this embodiment, the power supply signal that drive control circuit is detected by control circuit, controls according to power supply signal
Switching elements conductive or cut-off, and then capacitive element is controlled to the absorption process of surging signal.Wherein, power supply signal includes mother
Line signal and/or AC signal.Specifically, AC signal by rectification circuit handle be bus signal, bus signal with exchange
Signal can be used as the decision condition of control switch element conductive or cut-off.
In any of the above-described technical solution, it is preferable that bus capacitor is thin-film capacitor.
In any of the above-described technical solution, the capacitance of bus capacitor is less than preset capacity, and preset capacity is calculated as follows
Formula calculates:
Wherein, CdcFor preset capacity, LSThe total inductance value of equivalent drive control circuit DC side, PLIt is drive control circuit
Bearing power, RSThe all-in resistance of equivalent drive control circuit DC side, vdc0For busbar voltage average value, for example, with 7P model machine
For, C is determined according to the calculation formuladcHave to be larger than 840uF, preset capacity is 840uF or more, in the specific implementation be
1230uF。
Another aspect of the present invention proposes a kind of air-conditioner controller, comprising: such as the institute of any one of above-mentioned technical proposal
The drive control circuit stated.
Air-conditioner controller according to the present invention, the drive control electricity including any one of such as above-mentioned technical proposal
Road, thus whole technical effects with the drive control circuit, repeat no more.
Another aspect of the invention proposes a kind of air conditioner, comprising: motor；And such as any one of above-mentioned technical proposal
Drive control circuit；Or such as the air-conditioner controller in above-mentioned technical proposal；Wherein, the signal input part of motor is connected to driving
The driving signal of control circuit or air-conditioner controller, drive control circuit output is run for driving motor.
Air conditioner according to the present invention, the drive control circuit including any one of such as above-mentioned technical proposal, or
It is imitated such as the air-conditioner controller in above-mentioned technical proposal, thus with the technology of the drive control circuit or the air-conditioner controller whole
Fruit repeats no more.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows the topological structure schematic diagram of the controller of transducer air conditioning in the prior art；
Fig. 2 shows the structural schematic diagrams of drive control circuit according to first embodiment of the invention；
Fig. 3 shows the structural schematic diagram of the drive control circuit of second embodiment according to the present invention；
Fig. 4 shows the structural schematic diagram of the drive control circuit of third embodiment according to the present invention；
Fig. 5 shows the structural schematic diagram of the drive control circuit of the 4th embodiment according to the present invention；
Fig. 6 shows the structural schematic diagram of the drive control circuit of the 5th embodiment according to the present invention；
Fig. 7 shows the structural schematic diagram of drive control circuit according to the sixth embodiment of the present；
Fig. 8 shows the structural schematic diagram of the drive control circuit of the 7th embodiment according to the present invention；
Fig. 9 shows the structural schematic diagram of the drive control circuit of the 8th embodiment according to the present invention；
Figure 10 shows the structural schematic diagram of the drive control circuit of the 9th embodiment according to the present invention
Figure 11 shows the structural schematic diagram of the drive control circuit of the according to the present invention ten embodiment.
Wherein, the corresponding relationship in Fig. 1 between appended drawing reference and component names are as follows:
10 ' AC power supplies modules, 12 ' power filtering modules, 14 ' rectification modules, 16 ' filter modules, 18 ' inverter modules, 20 '
Load；
Wherein, corresponding relationship of the Fig. 2 into Figure 11 between appended drawing reference and component names are as follows:
10 inverter bridges, 12 reactors, 14 bus capacitors, 16 capacitive absorbing circuits, 18 one-way conduction elements, 20 switch members
Part, 22 first capacitive elements, 24 first resistance elements, 26 second capacitive elements, 28 second resistance elements, the resistive member of 30 thirds
Part, 32 thermo-sensitive resistors, 34 relays, 36 rectification circuits.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Referring to Fig. 2 to Figure 11 description drive control circuit according to some embodiments of the invention, air-conditioner controller and
Air conditioner.
An aspect of of the present present invention embodiment provides a kind of drive control circuit.
As shown in Figures 2 to 4, the structural schematic diagram of drive control circuit according to first embodiment of the invention.Wherein,
The drive control circuit, comprising: inverter bridge 10 is used for drive control load running, and the access of inverter bridge 10 is in high voltage bus and low
It presses between bus；For absorb drive control circuit driving load running during generate surging signal, reactor access in
Reactor 12 between power grid and load, for absorbing the surging signal generated during drive control circuit driving load running,
Reactor 12 accesses between power grid and load,；Bus capacitor 14 powers on required starting voltage, bus for providing load
Capacitor 14 is also used to absorb surging signal, and bus capacitor 14 accesses in the two buss lines of 10 input side of inverter bridge；Drive control
Circuit further include: capacitive absorbing circuit 16, for absorbing the surging signal on high voltage bus and low-voltage bus bar, capacitive absorbing circuit
16 is in parallel with bus capacitor 14.
Drive control circuit provided by the invention, electricity when surge energy is mainly derived from power input, model machine disorderly closedown
Machine winding, the inductance afterflow of alternating current-direct current side and motor kinetic energy, when surging signal comes temporarily, due to 14 (such as thin-film electro of bus capacitor
Hold or low capacity electrolytic capacitor) absorb surge capacity it is limited, busbar voltage can rapid increase, once busbar voltage be more than protection
Threshold value may be damaged component, to protect component not by high pressure damage (predominantly first device such as intelligent power module and capacitor
Part), capacitive absorbing circuit 16 is in parallel with bus capacitor 14, mother is absorbed come auxiliary bus bar capacitor 14 by capacitive absorbing circuit 16
Surging signal on line, in this way when surging signal comes temporarily, capacitive absorbing circuit 16 works simultaneously with bus capacitor 14, jointly
Surging signal is absorbed, as surging signal is absorbed by capacitive absorbing circuit 16, the voltage on bus capacitor 14 is begun to decline, from
And achieve the purpose that stable busbar voltage.Bus capacitor pair can be effectively relieved in the drive control circuit provided through the invention
The case where surging signal absorption difference, and then promote the stability and reliability of busbar voltage.
In one embodiment of the invention, it is preferable that drive control circuit further include: one-way conduction element 18 is used for
Capacitive absorbing circuit 16 is limited to the absorption process of surging signal, one-way conduction element 18 is connected with capacitive absorbing circuit 16, single
When being connected to breakover element 18, capacitive absorbing circuit 16 absorbs surging signal, and when one-way conduction element 18 ends, capacitive absorbs electricity
Road 16 stops absorbing surging signal.Specifically, as shown in Figures 2 to 4, one-way conduction element 18 is diode.
In this embodiment, drive control circuit further includes one-way conduction element 18, and one-way conduction element 18 and capacitive are inhaled
It receives circuit 16 to connect, uses one-way conduction element 18 as the isolation element of capacitive absorbing circuit 16 and bus capacitor 14, it can be with
Capacitive absorbing circuit 16 is limited to the absorption process of surging signal.Specifically, electricity is absorbed by one-way conduction element 18 and capacitive
The surge absorbing circuit that road 16 forms is no control form, when there is the surging signal for being higher than busbar voltage maximum value, is unidirectionally led
Logical element 18 is connected, and capacitive absorbing circuit 16 works simultaneously with bus capacitor 14, absorbs surging signal jointly；
In another embodiment of the present invention, it is preferable that drive control circuit further includes switch element 20, for regulating and controlling
Capacitive absorbing circuit 16 absorbs the process of surging signal, and switch element 20 is connected with capacitive absorbing circuit 16, and switch element 20 is led
When logical, capacitive absorbing circuit 16 absorbs surging signal, and when switch element 20 ends, capacitive absorbing circuit 16 stops absorbing surge letter
Number.Specifically, as shown in Figures 5 to 9, switch element 20 is relay switch.
In this embodiment, use switch element 20 as the isolation element of surge absoption capacitor and bus capacitor, composition
Surge absorbing circuit be controllable form, (such as 680V, can be according to the actual situation when current busbar voltage is greater than some fixed value
Set), switch element 20 is connected, and surging signal can be introduced into capacitive absorbing circuit 16 with most fast, to stablize bus
Voltage；In addition, the Absorption Capacitance of more low capacity can be used due to being controllable absorpting form, it is at low cost.
In one embodiment of the invention, it is preferable that capacitive absorbing circuit 16 includes: the first capacitive element 22, is used for
Absorb the surging signal on high voltage bus and low-voltage bus bar；First resistance element 24, for discharging in the first capacitive element 22
Surging signal, the first resistance element 24 are in parallel with the first capacitive element 22.
In this embodiment, capacitive absorbing circuit 16 includes the first capacitive element 22 and the first resistance element being connected in parallel
24, the quantity of the first capacitive element 22 and the first resistance element 24 is one or more.Specifically, as shown in Fig. 2, first holds
The quantity of property element 22 and the first resistance element 24 is one.
In another embodiment of the present invention, it is preferable that the quantity of the first resistance element 24 and the first capacitive element 22
Quantity correspond, and the first capacitive element 22 is in parallel with the first resistance element 24.It is in the quantity of the first capacitive element 22
When multiple, the first resistance element 24 plays the role of balance resistance, and electrolytic capacitor discharge resistance.
In another embodiment of the present invention, it is preferable that the quantity of the first resistance element 24 is multiple, multiple first resistances
Property element 24 connect after it is in parallel with the first capacitive element 22.
In one embodiment of the invention, it is preferable that capacitive absorbing circuit 16 further include: the second capacitive element 26 is used
In absorbing the surging signal on high voltage bus and low-voltage bus bar, the second capacitive element 26 is connected with the first capacitive element 22；Second
Resistance element 28, for discharging the surging signal in the second capacitive element 26, the second resistance element 28 and the second capacitive element 26
It is in parallel.
In this embodiment, capacitive absorbing circuit 16 further includes the second capacitive element 26 being connected in parallel and second resistive yuan
The quantity of part 28, the second capacitive element 26 and the second resistance element 28 is one or more.Specifically, as shown in Fig. 2, second
The quantity of capacitive element 26 and the second resistance element 28 is one.Wherein, the second capacitive element 26 and the first capacitive element 22
Capacitance can be the same or different, it is preferable that the first resistance element 24 is identical as the resistance value of the second resistance element 28, with balance
The voltage of first capacitive element 22 and the second capacitive element 26, and the effect of electrolytic capacitor discharge resistance.
In one embodiment of the invention, it is preferable that drive control circuit further include: third resistance element 30 is used for
Limitation flows through the electric current of capacitive absorbing circuit 16, and third resistance element 30 is connected on capacitive absorbing circuit 16 and one-way conduction element
Branch where 18.
In this embodiment, drive control circuit further includes third resistance element 30, passes through 30 convection current of third resistance element
Electric current through capacitive absorbing circuit 16 carries out current limliting.Wherein, according to the capacitance of the first capacitive element 22 and the second capacitive element 26
Difference, the selection of third resistance element 30 are also different.
In another embodiment of the present invention, it is preferable that third resistance element includes: one or more resistance, more
Series connection and/or parallel connection between a resistance.
In another embodiment of the present invention, as shown in Figure 8, it is preferable that drive control circuit further include: thermo-sensitive resistor
32, for limiting the electric current on the first capacitive element 22 and the second capacitive element 26, thermo-sensitive resistor 32 is accessed on high voltage bus.
In this embodiment, PTC is the abbreviation of Positive Temperature Coefficient, means positive temperature
Coefficient is spent, positive temperature coefficient very big semiconductor material or component are referred to.The PTC that usually we mention refers to positive temperature coefficient
Thermo-sensitive resistor, abbreviation thermo-sensitive resistor.By accessing thermo-sensitive resistor 32 on high voltage bus, mainly acted as in powered on moment
With, limit Absorption Capacitance on transient current, can be short-circuited after charging complete.Certainly, as long as resistance value is positive temperature coefficient
Device, can substitute thermo-sensitive resistor 32 use.
In one embodiment of the invention, it is preferable that about on the first capacitive element 22 and the second capacitive element 26
Energy problem, can there is a different releasing patterns, such as Figure 10 and Figure 11 both forms.
As shown in Figure 10, drive control circuit is provided with an output end, which is arranged in the first capacitive element 22
And second between capacitive element 26, the electric signal on high voltage bus is after diode to the first capacitive element 22 and the second capacitive
Element 26 carries out filling energy, the relatively low output electric signal of voltage is formed in the output end, wherein can be according to the company, output end institute
The loading demand connect specifically adjusts the capacitance ratio of the first capacitive element 22 and the second capacitive element 26, with the load to demand low pressure
Voltage is provided and suitably exports electric signal.
As shown in figure 11, drive control circuit is provided with another output, which is arranged in one-way conduction element
18 and first between capacitive element 22, and the electric signal on high voltage bus is after one-way conduction element 18 to the first capacitive element 22
With the second capacitive element 26 fill can, at this time the output end between one-way conduction element 18 and the first capacitive element 22 with it is low
There can be higher pressure difference between pressure bus, i.e., the output end provides output electric signal with high voltage, for demand high pressure
Load uses.
In another embodiment of the present invention, as shown in Figure 8, it is preferable that drive control circuit further include: relay
34, it is configured as control thermo-sensitive resistor 32 to the limit procedure of the electric current on the first capacitive element 22 and the second capacitive element 26,
Relay 34 is in parallel with thermo-sensitive resistor 32.
In this embodiment, relay 34 is configured as control thermo-sensitive resistor 32 to the first capacitive element 22 and the second capacitive
The limit procedure of electric current on element 26, relay 34 is normally opened, so that thermo-sensitive resistor 32 works in powered on moment, limitation absorbs
Transient current on capacitor, relay 34 is closed after charging complete, is short-circuited thermo-sensitive resistor 32.
In another embodiment of the present invention, as shown in Figure 9, it is preferable that drive control circuit further includes multiple temperature sensitive
Resistance 32, for limiting the electric current on the first capacitive element 22 and the second capacitive element 26, specifically, the quantity of thermo-sensitive resistor 32
For three, i.e. PTC1、PTC2、PTC3It indicates, three is respectively provided on every single line of three line of AC three-phase.
Preferably, drive control circuit further includes multiple relays 34, and the quantity and thermo-sensitive resistor 32 of relay 34 are one by one
Corresponding, specifically, the quantity of relay 34 is three, and three is in parallel with PTC1, PTC2, PTC3 respectively, is configured as controlling
Limit procedure of the thermo-sensitive resistor 32 to the electric current on the first capacitive element 22 and the second capacitive element 26.
For above-described embodiment, it should be understood that the effect that Fig. 2, Fig. 3, Fig. 4 are reached is completely the same, but in Fig. 4
It is greater than Fig. 2 and Fig. 3 the time required to the balance of voltage on one capacitive element 22 and the second capacitive element 26.Fig. 5, Fig. 6, Fig. 7 are used
Isolation element of the replacement diode of switch element 20 as the first capacitive element 22 and the second capacitive element 26 and bus capacitor 14,
Due to being controllable absorpting form, the capacitive element of more low capacity can be used；But since moment is connected from source side
A large amount of energy can be poured into, so increasing thermo-sensitive resistor 32 in source side, as shown in Figure 8, Figure 9, is realized using thermo-sensitive resistor 32
Surge energy caused by first absorption inductor, compression maneuver energy, compressor inductance etc., while thermo-sensitive resistor 32 is also used to limit first
Transient current on capacitive element 22 and the second capacitive element 26, to keep circuit more stable.
In another embodiment of the present invention, it is preferable that drive control circuit further include: control circuit (is not shown in figure
Out), it is connected with switch element 20, control circuit is used to detect the power supply signal of drive control circuit, and according to power supply signal
20 on or off of control switch element；Wherein, power supply signal includes bus signal and/or AC signal.
In this embodiment, the power supply signal that drive control circuit is detected by control circuit, controls according to power supply signal
20 on or off of switch element, and then capacitive element is controlled to the absorption process of surging signal.Wherein, power supply signal includes
Bus signal and/or AC signal.Specifically, AC signal by rectification circuit 36 processing be bus signal, bus signal and
AC signal can be used as the decision condition of 20 on or off of control switch element.
Wherein, after bus signal can be by the voltage and/or reactor 12 before reactor 12 after detection rectification circuit 36
Voltage before inverter bridge 10 obtains；AC signal is the voltage before AC-input voltage peak value and/or rectification circuit 36.
Wherein, it is in series with power amplifier (not shown) between control circuit and switch element 20, passes through power amplifier
By the control signal amplification of control circuit output, so that control circuit being capable of driving switch element 20.
In any of the above-described embodiment, it is preferable that bus capacitor 14 is thin-film capacitor.
In any of the above-described embodiment, the capacitance of bus capacitor 14 is less than preset capacity, and preset capacity is calculated as follows
Formula is calculated:
Wherein, CdcFor preset capacity, LSThe total inductance value of equivalent drive control circuit DC side, PLIt is drive control circuit
Bearing power, RSThe all-in resistance of equivalent drive control circuit DC side, vdc0For busbar voltage average value, for example, with 7P model machine
For, C is determined according to the calculation formuladcHave to be larger than 840uF, preset capacity is 840uF or more, in the specific implementation be
1230uF。
In order to better illustrate the present invention, as shown in Figures 2 to 11, parameter is arranged with 6KW model machine actual motion:
Reactor Lac refers to practical Inductor model and input power cord inductance, and it includes inductance and resistances, existing
Organic type uses Inductor 25mH, and the inductance of 500 milliohms, input power cord is less than or equal to 10mH (numerical value amplification), resistance
Not less than 0.5 Europe (actual use about 1.2 Europe of conductor resistance)；
Reactor 12 refers to actual DC side inductor models, and it includes inductance and resistance, 4.5mH, 120 milliohms；
R4 is system damping resistance (is not more than 200 Europe, 68 Europe are used on 16KW model machine, is practical not use),
Damping resistance R4 does not increase when reactor 12 selects 4.5mH, can also be without R4 without reactor 12 on 6KW model machine.
It should be understood that reactor Lac and reactor 12 are existed for EMC harmonic requirement, if it is there is harmonic wave
It is required that region, there may be reactor Lac on model machine, it is also possible to which there are reactors 12, in some instances it may even be possible to reactor Lac and reactor
12 coexist.And no harmonic requirement region, reactor Lac and reactor 12 are all not present, but in order to which high-frequency harmonic is asked
Inscribe (if ignoring the problem, can use reactor 12), can at 12 position of reactor of circuit topology use one compared with
Small reactor Ldc, preferably small inductor, such as less than 2mH, on this lesser Ldc a small damping resistance in parallel be in order to
Improve system stability.
The diode that one-way conduction element 18 selects pressure-resistant big and momentary excess current to be greater than 100A, third resistance element 30 are
Current-limiting resistance, the first capacitive element 22 and the second capacitive element 26 are first capacitor and the second capacitor, according to first capacitor and the
The capacitance of two capacitors is different, and current-limiting resistance selection is also different.It powers model machine for 6KW230V (phase voltage), first capacitor and the
Two capacitance selection 450V/820uF, current-limiting resistance select 4.7 Europe.
Bus capacitor 14 is thin-film capacitor, and 30uF, pressure-resistant 900V is selected (to be less than 100uF, actual film capacitance is bigger
It is easier to control, but cost is more expensive).
First resistance element 24 and the second resistance element 28 are balance resistances, and the effect of electrolytic capacitor discharge resistance, selection
150K。
Operation explanation:
When model machine powers on, the rectified circuit 36 of input voltage gives surge absoption capacitor (first capacitor and the after rectifying simultaneously
The series connection of two capacitors) and the charging of bus capacitor 14.When model machine operates normally, voltage is on bus capacitor 14 with alternating current input power supplying frequency
Only have smaller current to flow through in 6 times of frequency fluctuation, first capacitor and the second capacitor, the end voltage of first capacitor and the second capacitor
Stablize in busbar voltage maximum value.
Compressor winding, the inductance afterflow of alternating current-direct current side when surge energy is mainly derived from power input, model machine disorderly closedown
And compression maneuver energy；It is higher than current bus electricity when existing such as Fig. 2, Fig. 3, Fig. 4 if it is without control surge absorbing circuit form
When pressing the surge voltage of maximum value, first capacitor and the second capacitor work simultaneously with bus capacitor 14, common to absorb surge energy
Amount.If it is having control surge absorbing circuit form such as Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, current busbar voltage is greater than some fixed value
When (such as 680V), surge energy can be introduced into first capacitor and the second capacitor with most fast speed, thus stablize busbar voltage,
It is simultaneously stopped motor.As surge energy is absorbed by capacitor, the voltage on bus capacitor 14 is begun to decline, when main control chip is examined
Measure the voltage stabilization on bus capacitor 14 it is constant when (normally should be Vac × 1.414 × 1.732), at this time complete surge inhale
Receipts process disconnects switch element.It just needs to consider on relay contact when in fact, using AC relay as switch element
No current disconnects relay again；DC relay can complete surge absoption process in judgement, i.e., bus capacitor 14, which powers on, presses off
Begin just to disconnect relay when decline.
Another aspect of the present invention embodiment proposes a kind of air-conditioner controller, comprising: such as any one of above-described embodiment
The drive control circuit.
Air-conditioner controller provided in an embodiment of the present invention, the drive control including any one of such as above-described embodiment
Circuit, thus whole technical effects with the drive control circuit, repeat no more.
Another aspect of the invention embodiment proposes a kind of air conditioner, comprising: motor；As in above-mentioned any embodiment
Drive control circuit, or such as the air-conditioner controller in above-described embodiment；Wherein, the signal input part of motor is connected to drive control
The driving signal of circuit or air-conditioner controller, drive control circuit output is run for driving motor.
Air conditioner provided in an embodiment of the present invention, the drive control electricity including any one of such as above-described embodiment
Air-conditioner controller in road, or such as above-described embodiment, thus dc-link capacitance can be effectively solved using after low capacity capacitor
Surge energy absorb problem, stablize busbar voltage, protect component and guarantee control stability, thus guarantee air conditioner stablize
Operation.
Drive control circuit, air-conditioner controller and air conditioner provided by the invention, can effectively solve dc-link capacitance
Problem is absorbed using the surge energy after low capacity capacitor, stablizes busbar voltage, protect component and guarantees control stability.
In the description of this specification, term " first ", " second " are only used for the purpose of description, and should not be understood as indicating
Or imply relative importance, unless otherwise clearly defined and limited；Term " connection ", " installation ", " fixation " etc. should all be done extensively
Reason and good sense solution, for example, " connection " may be fixed connection or may be dismantle connection, or integral connection；It can be direct phase
It even, can also be indirectly connected through an intermediary.For the ordinary skill in the art, it can manage as the case may be
Solve the concrete meaning of above-mentioned term in the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of drive control circuit, comprising: inverter bridge is used for drive control load running, and the inverter bridge access is in high pressure
Between bus and low-voltage bus bar；It is characterized in that, the drive control circuit further include: reactor, for absorbing the driving
Control circuit drives the surging signal generated during the load running, and the reactor access is in power grid and the load
Between；Bus capacitor is used to provide the described load and powers on required starting voltage, and the bus capacitor is also used to absorb the surge
Signal, the bus capacitor access is in the two buss lines of the inverter bridge input side；And the drive control circuit is also wrapped
It includes:
Capacitive absorbing circuit, for absorbing the surging signal in the two buss lines, the capacitive absorbing circuit and the bus
Capacitor is in parallel.
2. drive control circuit according to claim 1, which is characterized in that further include:
One-way conduction element absorbs the process of the surging signal, the one-way conduction for regulating and controlling the capacitive absorbing circuit
Element is connected with the capacitive absorbing circuit, and when the one-way conduction element conductive, the capacitive absorbing circuit absorbs the wave
Signal is gushed, when the one-way conduction element ends, the capacitive absorbing circuit stops absorbing the surging signal.
3. drive control circuit according to claim 1, which is characterized in that further include:
Switch element absorbs the process of the surging signal, the switch element and institute for regulating and controlling the capacitive absorbing circuit
The series connection of capacitive absorbing circuit is stated, when the switching elements conductive, the capacitive absorbing circuit absorbs the surging signal, described to open
When closing element cut-off, the capacitive absorbing circuit stops absorbing the surging signal.
4. drive control circuit according to claim 1, which is characterized in that the capacitive absorbing circuit includes:
First capacitive element, for absorbing the surging signal on the high voltage bus and the low-voltage bus bar；
First resistance element, for discharging the surging signal in first capacitive element, first resistance element with it is described
First capacitive element is in parallel.
5. drive control circuit according to claim 4, which is characterized in that the capacitive absorbing circuit further include:
Second capacitive element, for absorbing the surging signal on the high voltage bus and the low-voltage bus bar, second capacitive
Element is connected with first capacitive element；
Second resistance element, for discharging the surging signal in second capacitive element, second resistance element with it is described
Second capacitive element is in parallel.
6. drive control circuit according to any one of claim 1 to 5, which is characterized in that further include:
Third resistance element, for limiting the electric current for flowing through the capacitive absorbing circuit, the third resistance element and the appearance
Property absorbing circuit series connection.
7. drive control circuit according to claim 6, which is characterized in that
The third resistance element includes: one or more resistance, is connected between the multiple resistance and/or in parallel.
8. drive control circuit according to claim 3, which is characterized in that further include:
Control circuit is connected with the switch element, and the control circuit is used to detect the power supply of the drive control circuit
Signal, and the switching elements conductive or cut-off are controlled according to the power supply signal；
Wherein, the power supply signal includes bus signal and/or AC signal.
9. a kind of air-conditioner controller characterized by comprising
Such as drive control circuit described in any item of the claim 1 to 8.
10. a kind of air conditioner characterized by comprising
Motor；And
Such as drive control circuit described in any item of the claim 1 to 8；Or
Air-conditioner controller as claimed in claim 9；
Wherein, the signal input part of the motor is connected to the drive control circuit or the air-conditioner controller, the driving
The driving signal of control circuit output is for driving the motor operation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019100417099 | 2019-01-16 | ||
| CN201910041709 | 2019-01-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110071623A true CN110071623A (en) | 2019-07-30 |
Family
ID=67371581
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910447791.5A Pending CN110071623A (en) | 2019-01-16 | 2019-05-27 | Drive control circuit, air-conditioner controller and air conditioner |
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| CN (1) | CN110071623A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114389514A (en) * | 2022-01-19 | 2022-04-22 | 美的威灵电机技术（上海）有限公司 | Surge protection circuit, motor controller and household electrical appliance |
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