CN108880392A - A kind of dead-zone compensation method, apparatus and system, a kind of drive control device - Google Patents
A kind of dead-zone compensation method, apparatus and system, a kind of drive control device Download PDFInfo
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- CN108880392A CN108880392A CN201810917978.2A CN201810917978A CN108880392A CN 108880392 A CN108880392 A CN 108880392A CN 201810917978 A CN201810917978 A CN 201810917978A CN 108880392 A CN108880392 A CN 108880392A
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- 238000005070 sampling Methods 0.000 claims description 6
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- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/04—Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for damping motor oscillations, e.g. for reducing hunting
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
- H02M7/5395—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The present invention discloses a kind of dead-zone compensation method, apparatus and system, a kind of drive control device.Wherein, which includes：Motor, drive control device, dead area compensation circuit are connected to motor, drive control device, for determining whether inverter circuit is in dead time；When inverter circuit is in dead time, enabling signal is sent to dead area compensation circuit；Dead area compensation circuit, for starting after receiving enabling signal, to carry out dead area compensation operation to inverter circuit.Motor can be compressor, through the invention, it can make in dead time, it is zero that inverter circuit, which is exported to the voltage of motor, to guarantee that output is consistent with expection voltage value of the PWM in modulation to the voltage of motor, the current distortion as caused by wave distortion and motor speed fluctuation are avoided, so that the operation of motor is more steady reliable, noise is smaller.
Description
Technical field
The present invention relates to motor control technology field, in particular to a kind of dead-zone compensation method, apparatus and system,
And a kind of drive control device.
Background technique
In compressor field, PWM (Pulse Width Modulation, pulse width modulation) mode is generallyd use to control
System is exported to the voltage of compressor.I.e. each bridge arm switching tube is alternately switched on or off, to obtain desired voltage or electric current.But by
In turning on and off with certain delay for switching tube, the regular hour is needed.Two up and down of same bridge arm in order to prevent
Switching tube simultaneously turns on, and is typically provided with dead time.Although dead time is that Microsecond grade is other, with the accumulation of time, extremely
Area's time can generate the counter electromotive force for being difficult to estimate, there are deviations for the actual voltage value and desired voltage values for causing output, cause
The distortion of electric current, causes wave distortion, so as to cause the fluctuation of speed of motor in compressor, influences the performance of compressor.
For the problem that dead time causes the output waveform of motor to be distorted in the prior art, motor performance is reduced, at present
Not yet put forward effective solutions.
Summary of the invention
A kind of dead-zone compensation method, apparatus and system, a kind of drive control device are provided in the embodiment of the present invention, it is existing to solve
The problem of output waveform for having the dead time in technology to lead to motor is distorted, and reduces motor performance.
In order to solve the above technical problems, in a first aspect, the embodiment of the present invention provides a kind of drive control device, including：Inversion
Circuit and dead area compensation circuit,
The dead area compensation circuit, connect with the inverter circuit, including three-phase bridge arm, and every phase bridge arm is respectively provided with two
Switching tube, and every phase bridge arm is respectively connected on the end U, the end W and the end V of the inverter circuit.
Further, the inverter circuit includes 6 switching tubes, and every two switching tube is one group, is located at three-phase bridge
On arm, three-phase inverter bridge circuit is constituted.
Further, the drive control device further includes：Rectifier is connect with the inverter circuit, is used for alternating current
It is converted into direct current.
Second aspect, the embodiment of the present invention provide a kind of dead area compensation system, the system comprises：Motor, first aspect
The drive control device,
The dead area compensation circuit is connect with the motor, the drive control device, for determining that the inverter circuit is
It is no to be in dead time；And when the inverter circuit is in the dead time, sends and start to the dead area compensation circuit
Signal；
The dead area compensation circuit, for starting after receiving the enabling signal, to carry out dead zone to the inverter circuit
Compensating operation.
Further, the dead area compensation circuit, the switching tube for controlling itself after actuation is all open-minded, with to institute
It states inverter circuit and voltage is provided；
Wherein, the voltage is for offsetting the voltage that the inverter circuit is generated in the dead time, so that described
It is zero that inverter circuit, which is exported in the dead time to the voltage of the motor,.
Further, the drive control device, it is all off for working as at least one set of switching tube in the inverter circuit
When, determine that the inverter circuit is in dead time；Wherein, the inverter circuit includes 6 switching tubes, and every two switching tube is
It one group, is located on three-phase bridge arm, constitutes three-phase inverter bridge circuit.
Further, the drive control device is also used to when two switching tubes on any bridge arm of the inverter circuit
When not simultaneously turning off, determine that the inverter circuit is not at dead time.
Further, the drive control device is also used to when opening positioned at upside in every phase bridge arm of the inverter circuit
It is open-minded to close pipe, when the switching tube positioned at downside is turned off, determines that the inverter circuit is not at dead time, and to described
Dead area compensation circuit sends first control signal；Alternatively, when the switching tube for being located at upside in every phase bridge arm of the inverter circuit
It is turned off, when the switching tube positioned at downside is opened；Determine that the inverter circuit is not at dead time, and according to sampling side
Formula sends second control signal to the dead area compensation circuit；Wherein, two switches on every phase bridge arm of the inverter circuit
Pipe is respectively at position one on the other；
The dead area compensation circuit, for receiving the first control signal, and the switching tube for controlling itself is all off
Or it is all open-minded；It is also used to receive the second control signal, and when the drive control device determines the sample mode for electricity
When resistance sampling, the switching tube for controlling itself is all off；When the drive control device determines that the sample mode is current sample
When, the switching tube for controlling itself is all open-minded.
Further, the drive control device is also used to control the electric motor starting, wherein when the electric motor starting, institute
The every phase bridge arm for stating inverter circuit is 50% duty ratio；It is zero that the inverter circuit, which is exported to the voltage of the motor,.
Further, the motor is compressor.
The third aspect, the embodiment of the present invention provide a kind of dead-zone compensation method, applied to driving control described in first aspect
Device processed, the method includes：
Determine whether inverter circuit is in dead time；
When the inverter circuit is in dead time, controlling dead error compensation circuit starting, with to the inverter circuit into
The operation of row dead area compensation；
Wherein, the dead area compensation operation provides voltage to the inverter circuit for the dead area compensation circuit, to offset
The voltage that the inverter circuit is generated in the dead time so that the inverter circuit exported in the dead time to
The voltage of the motor is zero.
Further, it is determined that inverter circuit whether in dead time include：
When at least one set of switching tube in the inverter circuit is all off, when determining that the inverter circuit is in dead zone
Between；Wherein, the inverter circuit includes 6 switching tubes, and every two switching tube is one group, is located on three-phase bridge arm, constitutes
Three-phase inverter bridge circuit；
When two switching tubes on any bridge arm of the inverter circuit do not simultaneously turn off, the inverter circuit is determined
It is not at dead time.
Further, when the inverter circuit is in dead time, controlling dead error compensation circuit starting, to described inverse
Power transformation road carries out dead area compensation operation：
Enabling signal is sent to the dead area compensation circuit, so that the switching tube of the dead area compensation circuit control itself
It is all open-minded.
Further, two switching tubes on any bridge arm of the inverter circuit do not simultaneously turn off, including：
Switching tube in every phase bridge arm positioned at upside is both turned on, and the switching tube positioned at downside is turned off；
Alternatively,
Switching tube in every phase bridge arm positioned at upside is turned off, and the switching tube positioned at downside is both turned on；
Wherein, two switching tubes on every phase bridge arm of the inverter circuit are respectively at position one on the other.
Further, the switching tube in every phase bridge arm positioned at upside is both turned on, what the switching tube positioned at downside was turned off
In the case of, when determining that the inverter circuit is not at dead time, the method also includes：
The switching tube for controlling the dead area compensation circuit is all off or all open-minded.
Further, the switching tube in every phase bridge arm positioned at upside is turned off, what the switching tube positioned at downside was both turned on
In the case of, when determining that the inverter circuit is not at dead time, the method also includes：
The dead area compensation circuit is controlled according to sample mode.
Controlling the dead area compensation circuit according to sample mode includes：
When determining that the sample mode is resistance sampling, then the switching tube for controlling the dead area compensation circuit is all off；
When determining that the sample mode is current sample, then the switching tube for controlling the dead area compensation circuit all turns on.
Further, before determining whether the inverter circuit is in dead time, the method also includes：
Control the electric motor starting, wherein every phase bridge arm of the inverter circuit is 50% when the electric motor starting
Duty ratio；It is zero that the inverter circuit, which is exported to the voltage of the motor,.
Fourth aspect, the embodiment of the present invention also provides a kind of dead area compensation device, for executing side described in the third aspect
Method, which is characterized in that described device includes：
Determining module, for determining whether the inverter circuit is in dead time；
Control module, for when the inverter circuit is in dead time, controlling dead error compensation circuit to start, to institute
It states inverter circuit and carries out dead area compensation operation；
Wherein, the dead area compensation operation provides voltage to the inverter circuit for the dead area compensation circuit, to offset
The voltage that the inverter circuit is generated in the dead time so that the inverter circuit exported in the dead time to
The voltage of the motor is zero.
Further, the determining module is also used to when at least one set of switching tube in the inverter circuit is all off
When, determine that the inverter circuit is in dead time；Wherein, the inverter circuit includes 6 switching tubes, and every two switching tube is
It one group, is located on three-phase bridge arm, constitutes three-phase inverter bridge circuit.
Further, the control module is also used to send enabling signal to the dead area compensation circuit, so that described
The switching tube of dead area compensation circuit control itself all turns on.
It applies the technical scheme of the present invention, system includes：Motor, drive control device, dead area compensation circuit are connected to motor,
Drive control device, for determining whether inverter circuit is in dead time；When inverter circuit is in dead time, mended to dead zone
It repays circuit and sends enabling signal；Dead area compensation circuit, for starting after receiving enabling signal, to carry out dead zone benefit to inverter circuit
Repay operation.Thus, it is possible to make in dead time, it is zero that inverter circuit, which is exported to the voltage of motor, with final guarantee output
Voltage to motor is consistent with expection voltage value of the PWM in modulation, avoids the current distortion as caused by wave distortion
And motor speed fluctuation, so that the operation of motor is more steady reliable, noise is smaller.
Detailed description of the invention
Fig. 1 is a kind of structural block diagram of drive control device according to an embodiment of the present invention；
Fig. 2 is a kind of structural block diagram of dead area compensation system according to an embodiment of the present invention；
Fig. 3 is a kind of flow chart of dead-zone compensation method according to an embodiment of the present invention；
Fig. 4 is a kind of flow chart of dead-zone compensation method according to an embodiment of the present invention；
Fig. 5 is a kind of flow chart of dead-zone compensation method according to an embodiment of the present invention；
Fig. 6 is a kind of structural block diagram of dead area compensation device according to an embodiment of the present invention.
Specific embodiment
Present invention is further described in detail in the following with reference to the drawings and specific embodiments, it should be understood that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
In subsequent description, it is only using the suffix for indicating such as " module ", " component " or " unit " of element
Be conducive to explanation of the invention, itself there is no a specific meaning.Therefore, " module ", " component " or " unit " can mix
Ground uses.
In order to solve the problem of that dead time causes the output waveform of motor to be distorted reduction motor performance in the prior art,
The embodiment of the present invention provides a kind of drive control device, as shown in Figure 1, drive control device includes：Inverter circuit 1 and dead area compensation electricity
Road 2.
Dead area compensation circuit 2 is connect with inverter circuit 1, including three-phase bridge arm, and every phase bridge arm is respectively provided with two switches
Pipe, and every phase bridge arm is respectively connected on the end U, the end W and the end V of inverter circuit 1.
As shown in Figure 1, dead area compensation circuit 2 has 6 switching tubes, respectively D7 to D12.D7 and D8 is one group, is located at
On one phase bridge arm, D9 to D10 is one group, is located on a phase bridge arm, and D11 and D12 are one group, is located on a phase bridge arm.It needs
It is bright, it only need to guarantee three-phase bridge arm and U, V, W are attached one by one, be not intended to limit the specific of a certain bridge arm and U, V, W
Connection relationship.
In one possible implementation, inverter circuit includes 6 switching tubes, and every two switching tube is one group, respectively
On three-phase bridge arm, three-phase inverter bridge circuit is constituted.As shown in Figure 1,6 switching tubes carry out label respectively with D1 to D6.
D1 and D4 is one group, and D2 and D5 are one group, and D3 and D6 are one group, is located on three-phase bridge arm.
It should be noted that above-mentioned digital 1 to 12 in addition to playing the role of label, and do not have remaining any limitation.And Fig. 1
Middle U, V, W are specifically described in Fig. 2 for connecing motor.
In one possible implementation, drive control device further includes：Rectifier 3 connect with inverter circuit 1, is used for
It is direct current by AC conversion.Wherein, rectifier can connect alternating current.
In embodiments of the present invention, can make in dead time, the voltage of output to motor is zero, to guarantee to export
Voltage to motor is consistent with expection voltage value of the PWM in modulation, avoids the current distortion as caused by wave distortion
And motor speed fluctuation, so that the operation of motor is more steady reliable, noise is smaller.
Fig. 2 shows a kind of motor dead area compensation system, which includes：Motor 4, drive control device shown in FIG. 1.Figure
2 is increase a compressor on the basis of Fig. 1, compressor be one kind of motor for example, so, compressor is in Fig. 2
In label it is identical with motor, be 4.
Dead area compensation circuit 2 is connect with motor 4, drive control device, when for whether determining inverter circuit 1 in dead zone
Between；When inverter circuit 1 is in dead time, enabling signal is sent to dead area compensation circuit 2；
Dead area compensation circuit 2, for starting after receiving enabling signal, to carry out dead area compensation operation to inverter circuit 1.
In embodiments of the present invention, can make in dead time, it is zero that inverter circuit, which is exported to the voltage of motor, with
It is final to guarantee that output is consistent with expection voltage value of the PWM in modulation to the voltage of motor, it avoids since wave distortion is made
At current distortion and motor speed fluctuation so that the operation of motor is more steady reliable, noise is smaller.
In one possible implementation, drive control device is also used to control the starting of motor 4, wherein motor 4 starts
When, every phase bridge arm of inverter circuit 1 is 50% duty ratio；The voltage of inverter circuit 1 output to motor 4 is zero.At this point, D1
Working condition is in D6.
In one possible implementation, drive control device is complete for working as at least one set of switching tube in inverter circuit 1
When portion turns off, determine that inverter circuit 1 is in dead time；Wherein, inverter circuit 1 includes 6 switching tubes, and every two switching tube is
It one group, is located on three-phase bridge arm, constitutes three-phase inverter bridge circuit.Dead area compensation circuit 2, certainly for control after actuation
The switching tube of body is all open-minded, to provide voltage to inverter circuit 1；Wherein, voltage is for offsetting inverter circuit 1 in dead time
The voltage of generation, so that it is zero that inverter circuit 1, which is exported in dead time to the voltage of motor 4,.Can finally it guarantee as a result, inverse
Power transformation road 1 exports consistent with expection voltage value of the PWM in modulation to the voltage of motor 4.
It is illustrated by taking system shown in Figure 2 as an example, when at least one set of switching tube in inverter circuit 1 is all off, generation
Table motor 4 is in dead time.At this point, the switching tube D7-D12 of dead area compensation circuit 2 should be all open-minded, it is used for inverter circuit
1 provides voltage, to offset the voltage that inverter circuit 1 is generated in dead time, so that inverter circuit 1 is exported in dead time
Voltage to motor 4 is zero.If without dead area compensation circuit 2, equivalent output voltage of the inverter circuit in dead time
It can change with the polar variation of compressor winding current, ultimately cause the voltage distortion of output to compressor.And work as dead zone
When the work of compensation circuit 2 (i.e. switching tube is all open-minded), it is zero that inverter circuit 1, which is exported in dead time to the voltage of motor 4,
It can finally guarantee that the output of inverter circuit 1 is consistent with expection voltage value of the PWM in modulation to the voltage of motor 4, avoid voltage
Distortion.
It should be noted that after the compensating operation for receiving dead area compensation circuit 2, if inverter circuit 1 is exported to motor 4
Voltage vector it is consistent with preset voltage value when (at this time, it appears that and inverter circuit exports in non-dead time to compressor
Voltage effect it is consistent), then explanation have reached compensation purpose, dead area compensation circuit stops working, these switching tubes of D7-D12
(also being understood as compensating switch) is failure to actuate.
In one possible implementation, drive control device is also used to as two on any bridge arm of inverter circuit 1
When switching tube does not simultaneously turn off, determine that inverter circuit 1 is not at dead time.
At this point, drive control device, the switching tube for being also used to work as in every phase bridge arm of inverter circuit 1 positioned at upside is open-minded,
When switching tube positioned at downside is turned off, determine that inverter circuit 1 is not at dead time, and send to dead area compensation circuit 2
First control signal；Alternatively, when the switching tube for being located at upside in every phase bridge arm of inverter circuit 1 is turned off, positioned at opening for downside
When pass pipe is opened；It determines that inverter circuit 1 is not at dead time, and is sent according to sample mode to dead area compensation circuit 2
Second control signal；Wherein, two switching tubes on every phase bridge arm of inverter circuit 1 are respectively at position one on the other；
Dead area compensation circuit 2, for receiving first control signal, and the switching tube that controls itself is all off or all opens
It is logical；It is also used to receive second control signal, and when drive control device determines that the sample mode is resistance sampling, controls itself
Switching tube it is all off；When drive control device determines that the sample mode is current sample, the switching tube for controlling itself is complete
Portion is open-minded.It is understood that can be sampled by current sensor to electric current.
Above-described embodiment can make in dead time, and it is zero that inverter circuit, which is exported to the voltage of motor, defeated to guarantee
It is consistent with expection voltage value of the PWM in modulation to the voltage of motor out, it is abnormal to avoid the electric current as caused by wave distortion
Become and motor speed fluctuation, so that the operation of motor is more steady reliable, noise is smaller.
Also, it is also possible that the start-up course of compressor is simpler reliable, in low-frequency operation, it is not susceptible to voltage
Distortion, it is more stable.
Fig. 3 shows a kind of dead-zone compensation method according to an embodiment of the present invention, is applied to drive control shown in FIG. 1
Device, method include：
Step S301, determine whether inverter circuit is in dead time；
Step S302, when inverter circuit is in dead time, controlling dead error compensation circuit starting, with to inverter circuit into
The operation of row dead area compensation；
Wherein, dead area compensation operation provides voltage to inverter circuit for dead area compensation circuit, to offset inverter circuit dead
The voltage that area's time generates, so that it is zero that inverter circuit, which is exported in dead time to the voltage of motor,.
Thus, it is possible to it is consistent with expection voltage value of the PWM in modulation to the voltage of motor to guarantee that inverter circuit is exported,
The current distortion as caused by wave distortion and motor speed fluctuation are avoided, so that the operation of motor more steadily may be used
Lean on, noise it is smaller.
In one possible implementation, as shown in figure 4, step S301, when determining whether inverter circuit is in dead zone
Between include：
Step S3011, when at least one set of switching tube in inverter circuit is all off, determine that inverter circuit is in dead zone
Time.
Wherein, inverter circuit includes 6 switching tubes, and every two switching tube is one group, is located on three-phase bridge arm, constitutes
Three-phase inverter bridge circuit.
Also, when two switching tubes on any bridge arm of inverter circuit do not simultaneously turn off, determine inverter circuit not
In dead time.Two switching tubes on any bridge arm of inverter circuit do not simultaneously turn off, including：It is located in every phase bridge arm
The switching tube of upside is both turned on, and the switching tube positioned at downside is turned off；Alternatively, the switching tube in every phase bridge arm positioned at upside closes
Disconnected, the switching tube positioned at downside is both turned on；Wherein, two switching tubes on every phase bridge arm of inverter circuit are respectively at one on one
Under position.
In one possible implementation, the switching tube in every phase bridge arm positioned at upside is both turned on, positioned at downside
In the case that switching tube is turned off, when determining that inverter circuit is not at dead time, method further includes：Controlling dead error compensation circuit
Switching tube it is all off or all it is open-minded.
In one possible implementation, the switching tube in every phase bridge arm positioned at upside is turned off, positioned at downside
In the case that switching tube is both turned on, when determining that inverter circuit is not at dead time, method further includes：It is controlled according to sample mode
The dead area compensation circuit.In one example, include according to sample mode controlling dead error compensation circuit：When determining sample mode
For resistance sampling, then the switching tube of controlling dead error compensation circuit is all off；When determining that sample mode is current sample, then control
The switching tube of dead area compensation circuit all turns on.
In one possible implementation, as shown in figure 4, step S302, when inverter circuit is in dead time, control
Dead area compensation circuit start processed, to include to inverter circuit progress dead area compensation operation：
Step S3021, enabling signal is sent to dead area compensation circuit, so that the switch of dead area compensation circuit control itself
Pipe all turns on.
In one possible implementation, in step S301, determine whether inverter circuit is in dead time before, side
Method further includes：Control electric motor starting, wherein every phase bridge arm of inverter circuit is 50% duty ratio when electric motor starting；Inversion
The voltage of circuit output to motor is zero.
Fig. 5 shows a kind of motor dead-zone compensation method according to an embodiment of the present invention, as shown in figure 5, this method includes：
Step S501, first stage dead area compensation starts；
Step S502, the appropriate state of reality of three bridge arms is read；
Step S503, it judges whether there is bridge arm and is in the dead zone stage；If so, thening follow the steps S504；If it is not, then holding
Row step S502；
Step S504, dead area compensation circuit state is read；
Step S505, judge whether dead area compensation circuit is opened；If so, thening follow the steps S506；If it is not, then executing
Step S504；
Step S506, dead zone timing；
Wherein, dead time can be preset by user, be under normal circumstances microsecond rank.
Step S507, judge whether dead zone terminates；If so, thening follow the steps S508；If not, thening follow the steps
S506；
Step S508, first stage dead area compensation terminates.
It should be noted that turning on and off with certain delay due to switching tube, needs the regular hour.In order to
It prevents two switching tubes up and down of same bridge arm from simultaneously turning on caused bombing, dead time need to be set.The first stage is as a result,
In order to illustrate the dead time of switching tube is interim and regular.
Thus, it is possible to it is consistent with expection voltage value of the PWM in modulation to the voltage of motor to guarantee that inverter circuit is exported,
The current distortion as caused by wave distortion and motor speed fluctuation are avoided, so that the operation of motor more steadily may be used
Lean on, noise it is smaller.
Fig. 6 shows a kind of motor dead area compensation device according to an embodiment of the present invention, for executing above-described embodiment institute
The method shown, as shown in fig. 6, the device includes：
Determining module 601, for determining whether inverter circuit is in dead time；
Control module 602, for when inverter circuit is in dead time, controlling dead error compensation circuit to start, to inverse
Power transformation road carries out dead area compensation operation；
Wherein, dead area compensation operation provides voltage to inverter circuit for dead area compensation circuit, to offset inverter circuit dead
The voltage that area's time generates, so that it is zero that inverter circuit, which is exported in dead time to the voltage of motor,.
In one possible implementation, determining module 601 are also used to when at least one set of switching tube in inverter circuit
When all off, determine that inverter circuit is in dead time；Wherein, inverter circuit includes 6 switching tubes, and every two switching tube is
It one group, is located on three-phase bridge arm, constitutes three-phase inverter bridge circuit.
In one possible implementation, control module 602 are also used to send enabling signal to dead area compensation circuit,
So that the switching tube of dead area compensation circuit control itself all turns on.
Thus, it is possible to it is consistent with expection voltage value of the PWM in modulation to the voltage of motor to guarantee that inverter circuit is exported,
The current distortion as caused by wave distortion and motor speed fluctuation are avoided, so that the operation of motor more steadily may be used
Lean on, noise it is smaller.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a mobile terminal (can be mobile phone, computer, clothes
Business device, air conditioner or the network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described above in conjunction with figure, but the invention is not limited to above-mentioned specific realities
Mode is applied, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art exist
Under enlightenment of the invention, without breaking away from the scope protected by the purposes and claims of the present invention, many shapes can be also made
Formula, all of these belong to the protection of the present invention.
Claims (21)
1. a kind of drive control device, which is characterized in that including：Inverter circuit and dead area compensation circuit,
The dead area compensation circuit, connect with the inverter circuit, including three-phase bridge arm, and every phase bridge arm is respectively provided with two switches
Pipe, and every phase bridge arm is respectively connected on the end U, the end W and the end V of the inverter circuit.
2. drive control device according to claim 1, which is characterized in that
The inverter circuit includes 6 switching tubes, and every two switching tube is one group, is located on three-phase bridge arm, constitutes three-phase
Bridge inverter main circuit.
3. drive control device according to claim 1, which is characterized in that the drive control device further includes：Rectifier, with
The inverter circuit connection, for being direct current by AC conversion.
4. a kind of dead area compensation system, which is characterized in that the system comprises：Motor, claims 1 to 3 are described in any item
Drive control device,
The dead area compensation circuit is connect with the motor, the drive control device, for determining whether the inverter circuit is located
In dead time, and when the inverter circuit is in the dead time, enabling signal is sent to the dead area compensation circuit；
The dead area compensation circuit, for starting after receiving the enabling signal, to carry out dead area compensation to the inverter circuit
Operation.
5. system according to claim 4, which is characterized in that
The dead area compensation circuit, the switching tube for controlling itself after actuation is all open-minded, to mention to the inverter circuit
Voltage supplied；
Wherein, the voltage is for offsetting the voltage that the inverter circuit is generated in the dead time, so that the inversion
It is zero that circuit, which is exported in the dead time to the voltage of the motor,.
6. system according to claim 4, which is characterized in that
The drive control device, for determining described inverse when at least one set of switching tube in the inverter circuit is all off
Power transformation road is in dead time；Wherein, the inverter circuit includes 6 switching tubes, and every two switching tube is one group, is located at
On three-phase bridge arm, three-phase inverter bridge circuit is constituted.
7. system according to claim 4, which is characterized in that
The drive control device is also used to not simultaneously turn off when two switching tubes on any bridge arm of the inverter circuit
When, determine that the inverter circuit is not at dead time.
8. system according to claim 7, which is characterized in that
The drive control device, the switching tube for being also used to work as in every phase bridge arm of the inverter circuit positioned at upside is open-minded, position
When switching tube in downside is turned off, determine that the inverter circuit is not at dead time, and to the dead area compensation circuit
Send first control signal；Alternatively, when the switching tube for being located at upside in every phase bridge arm of the inverter circuit is turned off, under being located at
When the switching tube of side is opened；Determine that the inverter circuit is not at dead time, and according to sample mode to the dead zone
Compensation circuit sends second control signal；Wherein, two switching tubes on every phase bridge arm of the inverter circuit are respectively at one
On position once；
The dead area compensation circuit, for receiving the first control signal, and the switching tube for controlling itself is all off or complete
Portion is open-minded；It is also used to receive the second control signal, and when the drive control device determines that the sample mode is adopted for resistance
When sample, the switching tube for controlling itself is all off；When the drive control device determines that the sample mode is current sample, control
The switching tube for making itself is all open-minded.
9. the system according to any one of claim 4-8, which is characterized in that
The drive control device is also used to control the electric motor starting, wherein when the electric motor starting, the inverter circuit
Every phase bridge arm is 50% duty ratio；It is zero that the inverter circuit, which is exported to the voltage of the motor,.
10. the system according to any one of claim 4-8, which is characterized in that
The motor is compressor.
11. a kind of dead-zone compensation method, applied to drive control device described in any one of claims 1 to 3, feature exists
In, the method includes：
Determine whether inverter circuit is in dead time；
When the inverter circuit is in dead time, the starting of controlling dead error compensation circuit is dead to carry out to the inverter circuit
Area's compensating operation；
Wherein, the dead area compensation operation provides voltage to the inverter circuit for the dead area compensation circuit, described in offsetting
The voltage that inverter circuit is generated in the dead time, so that the inverter circuit is exported in the dead time to described
The voltage of motor is zero.
12. according to the method for claim 11, which is characterized in that determine inverter circuit whether in dead time include：
When at least one set of switching tube in the inverter circuit is all off, determine that the inverter circuit is in dead time；
Wherein, the inverter circuit includes 6 switching tubes, and every two switching tube is one group, is located on three-phase bridge arm, constitutes three-phase
Bridge inverter main circuit；
When two switching tubes on any bridge arm of the inverter circuit do not simultaneously turn off, determine that the inverter circuit is not located
In dead time.
13. according to the method for claim 11, which is characterized in that when the inverter circuit is in dead time, control
Dead area compensation circuit start, to include to inverter circuit progress dead area compensation operation：
Enabling signal is sent to the dead area compensation circuit, so that the switching tube of the dead area compensation circuit control itself is whole
It is open-minded.
14. according to the method for claim 12, which is characterized in that two switches on any bridge arm of the inverter circuit
Guan Junwei is simultaneously turned off, including：
Switching tube in every phase bridge arm positioned at upside is both turned on, and the switching tube positioned at downside is turned off；
Alternatively,
Switching tube in every phase bridge arm positioned at upside is turned off, and the switching tube positioned at downside is both turned on；
Wherein, two switching tubes on every phase bridge arm of the inverter circuit are respectively at position one on the other.
15. according to the method for claim 14, which is characterized in that the switching tube in every phase bridge arm positioned at upside is led
Logical, in the case where being turned off positioned at the switching tube of downside, when determining that the inverter circuit is not at dead time, the method is also
Including：
The switching tube for controlling the dead area compensation circuit is all off or all open-minded.
16. according to the method for claim 14, which is characterized in that the switching tube in every phase bridge arm positioned at upside closes
Disconnected, in the case where being both turned on positioned at the switching tube of downside, when determining that the inverter circuit is not at dead time, the method is also
Including：
The dead area compensation circuit is controlled according to sample mode.
17. according to the method for claim 16, which is characterized in that control the dead area compensation circuit packet according to sample mode
It includes：
When determining that the sample mode is resistance sampling, then the switching tube for controlling the dead area compensation circuit is all off；
When determining that the sample mode is current sample, then the switching tube for controlling the dead area compensation circuit all turns on.
18. method described in any one of 1-17 according to claim 1, which is characterized in that determining that the inverter circuit is
It is no to be in front of dead time, the method also includes：
Control the electric motor starting, wherein every phase bridge arm of the inverter circuit is 50% duty when the electric motor starting
Than；It is zero that the inverter circuit, which is exported to the voltage of the motor,.
19. a kind of dead area compensation device, for method described in any one of perform claim requirement 11 to 18, which is characterized in that
Described device includes：
Determining module, for determining whether the inverter circuit is in dead time；
Control module, for when the inverter circuit is in dead time, controlling dead error compensation circuit to start, to described inverse
Power transformation road carries out dead area compensation operation；
Wherein, the dead area compensation operation provides voltage to the inverter circuit for the dead area compensation circuit, described in offsetting
The voltage that inverter circuit is generated in the dead time, so that the inverter circuit is exported in the dead time to described
The voltage of motor is zero.
20. device according to claim 19, which is characterized in that
The determining module is also used to determine described inverse when at least one set of switching tube in the inverter circuit is all off
Power transformation road is in dead time；Wherein, the inverter circuit includes 6 switching tubes, and every two switching tube is one group, is located at
On three-phase bridge arm, three-phase inverter bridge circuit is constituted.
21. device according to claim 19, which is characterized in that
The control module is also used to send enabling signal to the dead area compensation circuit, so that the dead area compensation circuit
The switching tube for controlling itself all turns on.
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| CN201810917978.2A CN108880392A (en) | 2018-08-13 | 2018-08-13 | A kind of dead-zone compensation method, apparatus and system, a kind of drive control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810917978.2A CN108880392A (en) | 2018-08-13 | 2018-08-13 | A kind of dead-zone compensation method, apparatus and system, a kind of drive control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114123907A (en) * | 2021-11-25 | 2022-03-01 | 珠海格力电器股份有限公司 | Permanent magnet synchronous motor low-speed operation control method and device and permanent magnet synchronous motor |
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