CN208589937U - Dead zone compensation system and driving controller - Google Patents
Dead zone compensation system and driving controller Download PDFInfo
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- CN208589937U CN208589937U CN201821299513.7U CN201821299513U CN208589937U CN 208589937 U CN208589937 U CN 208589937U CN 201821299513 U CN201821299513 U CN 201821299513U CN 208589937 U CN208589937 U CN 208589937U
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Abstract
The utility model discloses a blind spot compensating system, a drive controller. Wherein, this system includes: the dead-time compensation circuit is connected with the motor, and the driving controller is used for determining whether the inverter circuit is in dead-time or not; when the inverter circuit is in the dead time, a starting signal is sent to the dead time compensation circuit; and the dead zone compensation circuit is used for receiving the starting signal and then starting so as to carry out dead zone compensation operation on the inverter circuit. The motor can be the compressor, through the utility model discloses, can be so that when dead time, inverter circuit exports the voltage to the motor and is zero to the voltage of guaranteeing to export to the motor is unanimous with PWM anticipated voltage value in the modulation, has avoided because current distortion and the motor speed fluctuation that the wave form distortion caused, thereby makes the operation of motor steady more reliable, the noise is less.
Description
Technical field
The utility model relates to motor control technology fields, in particular to a kind of dead area compensation system, and one kind
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.
Utility model content
A kind of dead area compensation system, a kind of drive control device are provided in the utility model embodiment, to solve the prior art
In dead time cause the output waveform of motor to be distorted, reduce motor performance the problem of.
In order to solve the above technical problems, in a first aspect, the utility model embodiment provides a kind of drive control device, comprising:
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
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 include: rectifier is connect with the inverter circuit, is used for alternating current
It is converted into direct current.
Second aspect, the utility model embodiment provide a kind of dead area compensation system, the system comprises: motor, first
Drive control device described in aspect,
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, Xiang Suoshu dead area compensation circuit sends starting
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.
Using the technical solution of the utility model, system includes: motor, drive control device, dead area compensation circuit and motor
Connection, drive control device, for determining whether inverter circuit is in dead time；When inverter circuit is in dead time, to
Dead area compensation circuit sends enabling signal；Dead area compensation circuit, for starting after receiving enabling signal, to be carried out to inverter circuit
Dead area compensation operation.Thus, it is possible to make in dead time, it is zero that inverter circuit, which is exported to the voltage of motor, finally to protect
The voltage of card output to motor is consistent with expection voltage value of the PWM in modulation, avoids the electricity as caused by wave distortion
Stream 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 the structural block diagram according to a kind of drive control device of the utility model embodiment；
Fig. 2 is the structural block diagram according to a kind of dead area compensation system of the utility model embodiment.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, it should be understood that this place
The specific embodiment of description is only used to explain the utility model, is not used to limit the utility model.
In subsequent description, it is only using the suffix for indicating such as " module ", " component " or " unit " of element
The explanation for being conducive to the utility model, itself does not have a specific meaning.Therefore, " module ", " component " or " unit " can be with
Mixedly use.
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 utility model embodiment provides a kind of drive control device, as shown in Figure 1, drive control device includes: that inverter circuit 1 and dead zone are mended
Repay circuit 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 include: rectifier 3 connect with inverter circuit 1, is used for
It is direct current by AC conversion.Wherein, rectifier can connect alternating current.
In the utility model embodiment, it can make in dead time, the voltage of output to motor is zero, to guarantee
The voltage of output to motor is consistent with expection voltage value of the PWM in modulation, avoids the electric current as caused by wave distortion
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 the utility model embodiment, it can make in dead time, inverter circuit, which is exported to the voltage of motor, is
Zero, guarantee that output is consistent with expection voltage value of the PWM in modulation to the voltage of motor with final, avoids since waveform loses
Current distortion caused by true and motor speed fluctuation so that the operation of motor more it is steady it is 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.
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.
Above-mentioned the utility model embodiment serial number is for illustration only, 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, the technical solution of the utility model is substantially in other words to existing skill
The part that art contributes can be embodied in the form of software products, which is stored in a storage and is situated between
In matter (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that mobile terminal (it can be mobile phone, computer,
Server, air conditioner or network equipment etc.) execute method described in each embodiment of the utility model.
The embodiments of the present invention are described above in conjunction with figure, but the utility model be not limited to it is above-mentioned
Specific embodiment, the above mentioned embodiment is only schematical, rather than restrictive, the common skill of this field
Art personnel are not departing from the utility model aims and scope of the claimed protection situation under the enlightenment of the utility model
Under, many forms can be also made, these are belonged within the protection of the utility model.
Claims (10)
1. a kind of drive control device characterized by comprising 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 include: 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, Xiang Suoshu dead area compensation circuit sends enabling signal；
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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821299513.7U CN208589937U (en) | 2018-08-13 | 2018-08-13 | Dead zone compensation system and driving controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821299513.7U CN208589937U (en) | 2018-08-13 | 2018-08-13 | Dead zone compensation system and driving controller |
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| CN208589937U true CN208589937U (en) | 2019-03-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880392A (en) * | 2018-08-13 | 2018-11-23 | 珠海格力电器股份有限公司 | Dead zone compensation method, device and system and drive controller |
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2018
- 2018-08-13 CN CN201821299513.7U patent/CN208589937U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880392A (en) * | 2018-08-13 | 2018-11-23 | 珠海格力电器股份有限公司 | Dead zone compensation method, device and system and drive controller |
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