CN108900133A - The permanent magnet synchronous motor control device and method of height driving conversion speed - Google Patents
The permanent magnet synchronous motor control device and method of height driving conversion speed Download PDFInfo
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- CN108900133A CN108900133A CN201810863879.0A CN201810863879A CN108900133A CN 108900133 A CN108900133 A CN 108900133A CN 201810863879 A CN201810863879 A CN 201810863879A CN 108900133 A CN108900133 A CN 108900133A
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- switch
- stator winding
- absorbing circuit
- capacitor
- bridge arm
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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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
-
- 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
- H02M7/53871—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 with automatic control of output voltage or current
- H02M7/53875—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 with automatic control of output voltage or current with analogue control of three-phase output
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses the permanent magnet synchronous motor control devices and method of a kind of high driving conversion speed, including：Inverter circuit is made of three pairs of upper and lower bridge arms；First absorbing circuit, which selectively just connects, to be arranged at A phase stator winding both ends；The selectively reversal connection of second absorbing circuit is arranged at A phase stator winding both ends；Third absorbing circuit, which selectively just connects, to be arranged at B phase stator winding both ends；The selectively reversal connection of 4th absorbing circuit is arranged at B phase stator winding both ends；Selectivity just connects setting at C phase stator winding both ends respectively for first absorbing circuit and third absorbing circuit；Selectivity reversal connection is arranged at C phase stator winding both ends respectively for second absorbing circuit and the 4th absorbing circuit；The present invention efficiently solves the technical issues of slow stator winding commutating speed, commutation process lag.
Description
Technical field
The present invention relates to the control technology fields of permanent magnet synchronous motor, it is more particularly related to a kind of high driving
The permanent magnet synchronous motor control device and method of conversion speed.
Background technique
In recent years, fast with power electronic technique, microelectric technique, New-type electric machine control theory and rare earth permanent-magnetic material
Speed development, permasyn morot are rapidly promoted and applied.Compared with traditional electric excitation synchronous motor, permanent magnet synchronous electric
Machine, especially rare earth permanent-magnet synchronization motor have loss less, high-efficient, power savings clear advantage.Permasyn morot
Excitation is provided with permanent magnet, keeps electric motor structure relatively simple, reduces processing and assembly costs, and eliminate and easily go wrong
Collector ring and brush, improve the reliability of motor running；Again because being improved without exciting current without excitation loss
The efficiency and power density of motor, thus it is to study more in recent years and applied more and more extensive one in every field
Kind motor.
And when being controlled by stator winding of the inverter to permanent magnet synchronous motor, it needs using the higher switch of pressure resistance
Pipe is controlled, and with the increase of switching tube selection power, causes the actuation time of switching tube to increase, and then cause to pass through inversion
Device is slack-off to the power supply switch speed on each phase stator winding, reduces the speed for converting conducting in inverter between upper and lower bridge arm
Degree.
Summary of the invention
It is an object of the invention to solve at least the above problems, and provide the advantages of at least will be described later.
It is a still further object of the present invention to provide a kind of permanent magnet synchronous motor control device of high driving conversion speed and sides
Method reduces the drop-out voltage of switching tube in inverter, improves the movement speed of each switching tube, while passing through absorbing circuit
Effectively consume stator winding flow direction switching moment correspond to the counter electromotive force generated on stator winding, reduce and opened in right inverter
It closes pipe and cut-offs the voltage influence with closing course, improve the speed for converting conducting in inverter between upper and lower bridge arm, the present invention
The technical issues of efficiently solving slow stator winding commutating speed, commutation process lag.
In order to realize these purposes and other advantages according to the present invention, a kind of permanent magnetism of high driving conversion speed is provided
Synchronous motor control device and method, including：
Inverter circuit is made of three pairs of upper and lower bridge arms, and each bridge arm includes double switch group in parallel, described inverse
The output end on power transformation road is connected to the threephase stator winding of permanent magnet synchronous motor；
First absorbing circuit, selectivity, which just connects, to be arranged at A phase stator winding both ends；
Second absorbing circuit, selectivity reversal connection are arranged at A phase stator winding both ends；
Third absorbing circuit, selectivity, which just connects, to be arranged at B phase stator winding both ends；
4th absorbing circuit, selectivity reversal connection are arranged at B phase stator winding both ends；
Wherein, selectivity just connects setting in C phase stator winding two respectively for first absorbing circuit and third absorbing circuit
End；Selectivity reversal connection is arranged at C phase stator winding both ends respectively for second absorbing circuit and the 4th absorbing circuit；
Each absorbing circuit includes first switch Td, second switch Tk, first capacitor C1, third switch Tc, first
Resistance R1, second resistance R2,3rd resistor R3 and the second capacitor C2；The second switch Tk and first capacitor C1 constitutes the first string
Join branch, the 3rd resistor R3 and the second capacitor C2 parallel connection constitute the first parallel branch, the third switch Tc, the first parallel connection
Branch and second resistance R2 are followed in series to form the second series arm, first series arm and the second series arm parallel connection structure
At the second parallel branch, the first switch Td, first resistor R1 and the second parallel branch are sequentially connected in series.
Preferably, each upper bridge arm includes the first switch group and second switch group being arranged in parallel, the first switch group
It is connected in series by the first IGBT and the 2nd IGBT, the second switch group is connected in series by the 3rd IGBT and the 4th IGBT, described
The input terminal of upper bridge arm is connect with DC bus positive terminal, and the output end of the upper bridge arm connects with stator winding described in a wherein phase
It connects；
Each lower bridge arm includes the third switching group and the 4th switching group being arranged in parallel, and the third switching group is by the 5th
IGBT and the 6th IGBT are connected in series, and the 4th switching group is connected in series by the 7th IGBT and the 8th IGBT, the lower bridge arm
Input terminal connect with stator winding described in a wherein phase, the output end of the lower bridge arm is connect with DC bus negative pole end.
Preferably, the emitter of the 4th IGBT is connect with the collector of the 5th IGBT, the 4th IGBT's
Collector is connect with the emitter of the 5th IGBT.
Preferably, the structure of each absorbing circuit is consistent, and the absorbing circuit further includes first diode D1, sun
Pole is connected to the output end of second parallel branch；
Preferably, the input terminal of the first switch Td connects the first end or second end of each stator winding, institute
State the input terminal that the output end of first switch Td connects second parallel branch by the first resistor R1, the described 1st
The cathode of pole pipe D1 connects the first end or second end of each stator winding.
Preferably, the absorbing circuit further includes the second diode D2, is connected with the second capacitor C2, the third
The input terminal of switch Tc is connect with the first resistor R1, and the output end of the third switch Tc is separately connected the 3rd resistor
The anode tap of R3 first end and the second diode D2, the 3rd resistor R3 second end and the second resistance R2 first end
The cathode terminal of connection, the second diode D2 is connect by the second capacitor C2 with the second resistance R2 first end.
Preferably, the both ends a first capacitor C1 third series arm in parallel, the third series arm include mutual
Concatenated 4th resistance R4 and the 4th switch Tp, the input terminal of the second switch Tk is connect with the first resistor R1, described
The output end of second switch Tk is connect with by the first capacitor C1 with the anode tap of the first diode D1；Described 4th
The first end of resistance R4 is connect with the output end of the second switch Tk, and the second end of the 4th resistance R4 is opened with the described 4th
The input terminal connection of Tp is closed, the output end of the 4th switch Tp is connect with the anode tap of the first diode D1.
Preferably, the absorbing circuit further includes third diode D3, is connected on the second diode D2 and the 4th
Between resistance R4, the anode of the third diode D3 is connect with the cathode of the second diode D2, the third diode
The cathode of D3 is connect with the first end of the 4th resistance R4.
It preferably, further include a voltage comparator, non-inverting input terminal connects the 3rd resistor R3 both end voltage, described
The inverting input terminal of voltage comparator connects the second capacitor C2 both end voltage, the output end of the voltage comparator and place
The control terminal of the second switch Tk on absorbing circuit connects；The second switch Tk is a normally closed controllable switch, described the
The resistance value of two resistance R2 is 5-10 times of 3rd resistor R3 resistance value.
A kind of control method of permanent magnet synchronous motor control, includes the following steps：
Step 1: in the corresponding upper bridge arm conducting of control and lower bridge arm turn off process, when calculating lower bridge arm is disconnected from triggering
The interval time TA being carved between corresponding stator winding current zero-acrross ing moment, controlling the lower bridge arm, to correspond to stator winding both ends reversed
An absorbing circuit is connected, while the absorbing circuit at stator winding both ends is performed the following operation：Be respectively closed first switch Td,
Second switch Tk and third switch Tc, real-time monitoring 3rd resistor R3 and the second capacitor C2 both end voltage, as the second capacitor C2 two
When voltage being held to be greater than 3rd resistor R3 both end voltage, then second switch Tk disconnection is controlled；After the TA time, it is each turned off first
Switch Td and third switch Tc is closed at the 4th switch Tp by the absorbing circuit from two tip cut-off of stator winding, will
Electric energy release in first capacitor C1 and the second capacitor C2；
Step 2: in the corresponding upper bridge arm shutdown of control and lower bridge arm turn on process, when bridge arm is disconnected from triggering in calculating
The interval time TB being carved between corresponding stator winding current zero-acrross ing moment controls bridge arm on this and corresponds to stator winding both ends forward direction
An absorbing circuit is connected, while the absorbing circuit at stator winding both ends is performed the following operation：Be respectively closed first switch Td,
Second switch Tk and third switch Tc, real-time monitoring 3rd resistor R3 and the second capacitor C2 both end voltage, as the second capacitor C2 two
When voltage being held to be greater than 3rd resistor R3 both end voltage, then second switch Tk disconnection is controlled；After the TB time, it is each turned off first
Switch Td and third switch Tc is closed at the 4th switch Tp by the absorbing circuit from two tip cut-off of stator winding, will
Electric energy release in first capacitor C1 and the second capacitor C2.
The present invention is include at least the following beneficial effects：
1, in the present invention, double switch group has been arranged in parallel on each bridge arm of inverter, each switching group is by connecting
Two switches constitute, to reduce the drop-out voltage and electric current of switching tube in inverter, improve the dynamic of each switching tube
Make speed；
2, stator winding flow direction switching moment is effectively consumed by absorbing circuit simultaneously to correspond to and generate on stator winding
Counter electromotive force reduces switching tube in right inverter and cut-offs voltage influence with closing course, improves in inverter bridge up and down
The speed that conducting is converted between arm efficiently solves the technical issues of stator winding commutating speed is slow, commutation process lags.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the overall structure diagram of present system；
Fig. 2 is the structural schematic diagram of absorbing circuit.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or combinations thereof.
As shown in Figs. 1-2, the present invention provides a kind of permanent magnet synchronous motor control device of high driving conversion speed, packets
It includes：Inverter circuit, absorbing circuit and controller.
Inverter circuit is made of three pairs of upper and lower bridge arms, and inverter circuit is three-phase full-bridge inverter, as improvement, in order to divide
Stream is to reduce the drop-out current of switching tube in each inverter circuit, and the bridge arm includes two-way in parallel each of in the present invention
The output end of switching group, the inverter circuit is connected to the threephase stator winding of permanent magnet synchronous motor.
Specifically, each upper bridge arm includes the first switch group and second switch group being arranged in parallel, the first switch group
It is connected in series by the first IGBT and the 2nd IGBT, the second switch group is connected in series by the 3rd IGBT and the 4th IGBT, described
The input terminal of upper bridge arm is connect with DC bus positive terminal, and the output end of the upper bridge arm connects with stator winding described in a wherein phase
It connects.
Each lower bridge arm includes the third switching group and the 4th switching group being arranged in parallel, and the third switching group is by the 5th
IGBT and the 6th IGBT are connected in series, and the 4th switching group is connected in series by the 7th IGBT and the 8th IGBT, the lower bridge arm
Input terminal connect with stator winding described in a wherein phase, the output end of the lower bridge arm is connect with DC bus negative pole end.
As shown in Figure 1, the first IGBT and the 2nd IGBT are successively labeled as T11 and T12, third in first upper bridge arm
IGBT and the 4th IGBT is successively labeled as T13 and T14, and the output end of first upper bridge arm is connect with A phase stator winding.First
In lower bridge arm, the 5th IGBT and the 6th IGBT are successively labeled as T21 and T22, and the 7th IGBT and the 8th IGBT are successively labeled as T23
And T24, the input terminal of first lower bridge arm are connect with A phase stator winding.The emitter of the 4th IGBT T14 and described the
The collector of five IGBT T21 connects, and the collector of the 4th IGBT T14 and the emitter of the 5th IGBT T21 connect
It connects.
Second pair of upper and lower bridge arm and third are consistent with the structure of first pair of upper and lower bridge arm to the structure of upper and lower bridge arm, wherein the
Two pairs of upper and lower bridge arms are correspondingly connected with the connection of B phase stator winding, and third is correspondingly connected with the connection of C phase stator winding to upper and lower bridge arm.
The actuation time of switching tube is related with drop-out current size, and drop-out current is bigger, and the switching tube action time is longer.By
This on each bridge arm of inverter it is found that be arranged in parallel double switch group, and each switching group is by concatenated two switches structure
At improving the movement speed of each switching tube, Jin Erti to reduce the drop-out voltage and electric current of switching tube in inverter
Control precision of the height to permanent magnet synchronous motor.
It include 4 absorbing circuits in the present invention, the first absorbing circuit 1 is selectively just connect by switch T1 to be arranged in A phase
Stator winding both ends；Second absorbing circuit 2 is arranged by switch T2 selectively reversal connection at A phase stator winding both ends；Third absorbs
Circuit 3 is selectively just connect by switch T3 to be arranged at B phase stator winding both ends；4th absorbing circuit 4 passes through switch T4 selectivity
Reversal connection is arranged at B phase stator winding both ends.
Wherein, first absorbing circuit 1 is selectively just connect by switch T6 and is arranged in C phase stator winding both ends, third
Absorbing circuit 3 is selectively just connect by switch T7 to be arranged at C phase stator winding both ends；Second absorbing circuit 2 passes through switch
At C phase stator winding both ends, the 4th absorbing circuit 4 is arranged by switch T8 selectively reversal connection in C phase for T5 selectively reversal connection setting
Stator winding both ends.
When first upper bridge arm shutdown, counter electromotive force is absorbed with the first absorbing circuit 1, when first lower bridge arm turns off,
Counter electromotive force is absorbed with the second absorbing circuit 2.Similarly, it when second upper bridge arm shutdown, is absorbed with third absorbing circuit 3 anti-
Electromotive force absorbs counter electromotive force with the 4th absorbing circuit 4 when second lower bridge arm turns off.Because when the shutdown of each bridge arm
Different and at least 60 ° phase angles interval is carved, so the first absorbing circuit 1 can be shared when the upper bridge arm of third turns off
Or third absorbing circuit 3 absorbs counter electromotive force, it is preferred that first absorbing circuit 1 is selected to be absorbed；Third lower bridge arm
When shutdown, the second absorbing circuit 2 or the 4th absorbing circuit 4 can be shared to absorb counter electromotive force, it is preferred that select second to absorb
Circuit 2 is absorbed.Simplify circuit structure by common suction circuit so as to reduce the configuration quantity of absorbing circuit.
Absorbing circuit, which just connects or is reversely connected, to be arranged at each stator winding both ends, as shown in Figure 1, being provided in the present invention
4 absorbing circuits, the first absorbing circuit 1 is selectively just connect by switch T1 to be arranged at A phase stator winding both ends；Second absorbs electricity
Road 2 is arranged by switch T2 selectively reversal connection at A phase stator winding both ends；Third absorbing circuit 3 is selective just by switch T3
It connects and is arranged at B phase stator winding both ends；4th absorbing circuit 4 is arranged by switch T4 selectively reversal connection in B phase stator winding two
End.First absorbing circuit 1 selectively just connects setting by switch T6 at C phase stator winding both ends, and third absorbing circuit 3 is logical
It crosses switch T7 and selectively just connects and be arranged at C phase stator winding both ends；Second absorbing circuit 2 is selectively reversely connected by switch T5
Setting is arranged by switch T8 selectively reversal connection at C phase stator winding both ends in C phase stator winding both ends, the 4th absorbing circuit 4.
Just connecing and referring to that the input terminal of absorbing circuit is connected with the first end of corresponding stator winding, the output end of absorbing circuit with
Corresponding stator winding second end connection, which is exactly the neutral point of stator winding.The mode of reversal connection and the mode phase just connect
Instead.
The structure of each absorbing circuit is identical, as shown in Fig. 2, specifically, the absorbing circuit includes first switch Td,
Two switch Tk, first capacitor C1, third switch Tc, first resistor R1, second resistance R2,3rd resistor R3 and the second capacitor C2；
The second switch Tk and first capacitor C1 constitutes the first series arm, and the 3rd resistor R3 and the second capacitor C2 parallel connection are constituted
First parallel branch, the third switch Tc, the first parallel branch and second resistance R2 are followed in series to form the second series arm,
First series arm and the second series arm parallel connection constitute the second parallel branch, the first switch Td, first resistor R1
It is sequentially connected in series with the second parallel branch.The absorbing circuit further includes first diode D1, and anode is connected to described second simultaneously
Join the output end of branch, first diode D1 is for avoiding electric current from flowing into from the output end of absorbing circuit.
The input terminal of the first switch Td connects the first end or second end of each stator winding, and described first opens
The output end for closing Td connects the input terminal of second parallel branch by the first resistor R1, the first diode D1's
Cathode connects the first end or second end of each stator winding.Specifically, the input terminal of first switch Td connects if just connecing
Connect the first end of stator winding, the second end of the cathode connecting stator winding of first diode D1；If reversal connection, first switch Td
Input terminal connecting stator winding second end, the first end of the cathode connecting stator winding of first diode D1.
The absorbing circuit further includes the second diode D2, is connected with the second capacitor C2, the third switch Tc
Input terminal connect with the first resistor R1, the output end of the third switch Tc is separately connected the 3rd resistor R3 first
The anode tap at end and the second diode D2, the 3rd resistor R3 second end are connect with the second resistance R2 first end,
The cathode terminal of the second diode D2 is connect by the second capacitor C2 with the second resistance R2 first end.Two or two pole
The electricity adverse current that pipe D2 is used to prevent in the second capacitor C2 arrives 3rd resistor R3, so that the second capacitor C2 both end voltage is able to maintain
Highest order can be detected out when partial pressure of the counter electromotive force on 3rd resistor R3 is less than the second capacitor C2 both ends builtin voltage
Difference between second capacitor C2 both end voltage and 3rd resistor R3 both end voltage.
One third series arm of the both ends first capacitor C1 parallel connection, the third series arm include the be serially connected
Four resistance R4 and the 4th switch Tp, the input terminal of the second switch Tk are connect with the first resistor R1, the second switch
The output end of Tk is connect with by the first capacitor C1 with the anode tap of the first diode D1；The 4th resistance R4's
First end is connect with the output end of the second switch Tk, and the second end of the 4th resistance R4 is defeated with the 4th switch Tp's
Enter end connection, the output end of the 4th switch Tp is connect with the anode tap of the first diode D1.
The absorbing circuit further includes third diode D3, be connected on the second diode D2 and the 4th resistance R4 it
Between, the anode of the third diode D3 is connect with the cathode of the second diode D2, the cathode of the third diode D3
It is connect with the first end of the 4th resistance R4, third diode D3 is for preventing from sending out between first capacitor C1 and the second capacitor C2
Raw electricity flowing.
Each switch is controllable switch, and the control terminal of each controllable switch and IGBT are connect with controller, wherein described
Second switch Tk is a normally closed controllable switch.5 times of Rated motor voltage are not less than to the breakdown voltage of the capacity of each capacitor,
The resistance value of each resistance is selected according to capacity motor, capacity motor is bigger, then the resistance value of resistance is chosen bigger, to guarantee electricity
Resistance in inverter circuit in the upper and lower bridge arm switching action period, can absorb fully absorb generated on stator winding it is anti-electronic
Potential energy.Wherein, the resistance value of the second resistance R2 is 7 times of 3rd resistor R3 resistance value.
Voltage comparator selects common voltage comparator in the market, voltage comparator non-inverting input terminal connection described the
The inverting input terminal of three resistance R3 both end voltages, the voltage comparator connects the second capacitor C2 both end voltage, the electricity
The output end of pressure comparator is connect with the control terminal of the second switch Tk.Voltage comparator is for comparing 3rd resistor R3 and the
Voltage value on two both ends capacitor C2, output comparison result are sent in controller, and controller is controlled according to the comparison result
The on-off of second switch Tk.
The handoff procedure of each pair of upper and lower bridge arm is divided into two kinds in inverter circuit, the first is that upper bridge arm conducting and lower bridge arm are closed
Disconnected process, second is upper bridge arm shutdown and lower bridge arm turn on process.Specific control method is as follows：
A kind of control method of permanent magnet synchronous motor control, includes the following steps：
Step 1: in the corresponding upper bridge arm conducting of control and lower bridge arm turn off process, when calculating lower bridge arm is disconnected from triggering
The interval time TA being carved between corresponding stator winding current zero-acrross ing moment, controlling the lower bridge arm, to correspond to stator winding both ends reversed
Connect an absorbing circuit, while triggering lower bridge arm disconnects the moment, while to the absorbing circuit at stator winding both ends carry out with
Lower operation：It is illustrated by taking the shutdown of the first lower bridge arm as an example, control T2 closure, by 2 Opposite direction connection of the second absorbing circuit in A phase
Stator winding both ends.First switch Td, the second switch Tk and third switch Tc being respectively closed in the second absorbing circuit 2, in real time
3rd resistor R3 and the second capacitor C2 both end voltage are monitored, since lower bridge arm triggers and disconnects the moment, is opened on corresponding stator winding
Begin to generate counter electromotive force, counter electromotive force enters in the second absorbing circuit from first switch Td input terminal, by first capacitor C1,
3rd resistor R3, second resistance R2, the second capacitor C2 and first resistor R1 absorb simultaneously, improve transient absorption ability, avoid anti-
Electromotive force is fed back in inverter, is interfered to the control of inverter, is influenced the control to motor and is accurately controlled.
It is generated until maximum value in counter electromotive force, the second capacitor C2 both end voltage is with 3rd resistor R3 both end voltage
It is consistent, and all in ascent stage, it is begun to decline after counter electromotive force reaches maximum value, 3rd resistor R3 and the second capacitor C2
Both end voltage is also begun to decline, but the second capacitor C2 is still in charging process, with the continuation of charging, in the second capacitor C2
Portion's both end voltage persistently rises, until 3rd resistor R3 both end voltage is less than both end voltage inside the second capacitor C2, second
Capacitor C2 charging process terminates, and due to the effect of the second diode D2, prevents the electricity adverse current in the second capacitor C2 from arriving third electricity
R3 is hindered, so that the second capacitor C2 both end voltage is able to maintain highest order.Second diode D2 prevents the second capacitor C2 by simultaneously
The voltage of three resistance R3 first ends is lifted, and is influenced counter electromotive force and is flowed to 3rd resistor R3, so that counter electromotive force can not absorb electricity
It is completely depleted in road.
When voltage comparator collects the second capacitor C2 both end voltage greater than 3rd resistor R3 both end voltage, then explanation is anti-
The main peak of electromotive force is pass by, and no longer needs to increase absorptive capacity using first capacitor C1, at this point, control second switch Tk is disconnected
It opens, remaining counter electromotive force energy is individually absorbed by resistance R1-R3.On the other hand, if second switch Tk not disconnected, make
It obtains first capacitor C1 to cut off from absorbing circuit, then with the decline of counter electromotive force, first capacitor C1 both end voltage is greater than anti-electricity
Kinetic potential, first capacitor C1 can not also continue to absorb counter electromotive force energy, can damage second switch Tk or even first capacitor C1 instead
Middle voltage can reversely be lifted the voltage of first resistor R1 second end, so that counter electromotive force flow direction is influenced, so that counter electromotive force can not
It is completely depleted in absorbing circuit.
Second switch Tk is disconnected after the T1 time, stator winding zero passage, counter electromotive force is also completely absorbed, and is distinguished at this time
First switch Td and third switch Tc is disconnected, by the absorbing circuit from two tip cut-off of A phase stator winding, is closed at described the
Four switch Tp, to form two in-fighting circuits, first article of in-fighting circuit is by first capacitor C1, the 4th switch Tp and the 4th electricity
Resistance R4 is composed in series, and the electric energy stored in first capacitor C1 is completely depleted on the 4th resistance R4.Article 2 in-fighting circuit be by
Second capacitor C2, third diode D3, the 4th switch Tp, the 4th resistance R4 and second resistance R2 are composed in series, the second capacitor C2
The electric energy of interior storage is completely depleted on the 4th resistance R4 and second resistance R2.Thus will be in first capacitor C1 and the second capacitor C2
Electric energy release, absorbing circuit waits the course of work next time.
Step 2: control process is consistent with step 1 in the corresponding upper bridge arm shutdown of control and lower bridge arm turn on process,
Distinctive points are that control object is the absorbing circuit of upper bridge arm and its corresponding stator winding both ends.Specifically, calculate upper bridge arm from
Triggering disconnect the moment to correspondence stator winding current zero-acrross ing moment between interval time TB, control bridge arm on this correspond to stator around
Group both ends forward direction connects an absorbing circuit, while performing the following operation to the absorbing circuit at stator winding both ends：On first
It is illustrated for bridge arm shutdown, 1 forward direction of the first absorbing circuit is connected to A phase stator winding both ends by control T1 closure.Point
First switch Td, the second switch Tk and third switch Tc, real-time monitoring 3rd resistor R3 that are not closed in the first absorbing circuit 1 and
Second capacitor C2 both end voltage then controls second and opens when the second capacitor C2 both end voltage is greater than 3rd resistor R3 both end voltage
Tk is closed to disconnect；After the TB time, it is each turned off first switch Td and third switch Tc, by the absorbing circuit from stator winding
Two tip cut-offs are closed at the 4th switch Tp, and the electric energy in first capacitor C1 and the second capacitor C2 is discharged.
Step 1 and step 2 circular treatment are passed through to the absorbing circuit of each pair of bridge arm and its corresponding stator winding both ends, most
The counter electromotive force generated on each stator of motor can be effectively absorbed eventually, improve the control accuracy to motor.
From the above mentioned, when the middle switching tube of permanent magnet synchronous motor inverter switches over operation, the stator winding of phase is turned off
On can generate counter electromotive force, the control of inverter can be interfered by feeding back in inverter, that is, can be to the accurate of motor
Control generates interference, needs effectively to absorb the counter electromotive force generated thus.Specifically, starting to generate to arrival most in counter electromotive force
Before big value, capacitor is needed to promote the transient absorption ability of absorbing circuit, avoids opposing electromotance feedback on winding to inversion
In device, the control of inverter is interfered；When counter electromotive force, which reaches maximum value, to be begun to decline, then it is not necessarily to capacitor and absorbs again
Counter electromotive force can fully absorb counter electromotive force by the resistance in absorbing circuit, be needed at this time by capacitor from absorbing circuit
Excision, while the voltage on capacitor lifting absorbing circuit is prevented, hinder counter electromotive force completely depleted on absorbing circuit.Existing skill
It can not accomplish this point in art.
On the other hand, the Breaking capacity of switching tube and the actuation time of switching tube are related, and Breaking capacity is bigger, then switching tube
Actuation time it is longer, the actuation time of switching tube is longer, then inverter is poor to the control precision of motor, Motor Control Field
In also seldom consider this point.
From the above mentioned, in the present invention, double switch group, each switching group have been arranged in parallel on each bridge arm of inverter
It is made of concatenated two switches, to reduce the drop-out voltage and electric current of switching tube in inverter, improves each switch
The movement speed of pipe；Stator winding flow direction switching moment is effectively consumed by absorbing circuit simultaneously to correspond to and generate on stator winding
Counter electromotive force, reduce switching tube in right inverter and cut-off voltage influence with closing course, improve in inverter up and down
The speed that conducting is converted between bridge arm efficiently solves the technical issues of stator winding commutating speed is slow, commutation process lags.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of permanent magnet synchronous motor control device of high driving conversion speed, which is characterized in that including：
Inverter circuit is made of three pairs of upper and lower bridge arms, and each bridge arm includes double switch group in parallel, the inversion electricity
The output end on road is connected to the threephase stator winding of permanent magnet synchronous motor；
First absorbing circuit, selectivity, which just connects, to be arranged at A phase stator winding both ends；
Second absorbing circuit, selectivity reversal connection are arranged at A phase stator winding both ends；
Third absorbing circuit, selectivity, which just connects, to be arranged at B phase stator winding both ends；
4th absorbing circuit, selectivity reversal connection are arranged at B phase stator winding both ends；
Wherein, selectivity just connects setting at C phase stator winding both ends respectively for first absorbing circuit and third absorbing circuit；Institute
Stating the second absorbing circuit and the 4th absorbing circuit, selectivity reversal connection is arranged at C phase stator winding both ends respectively；
Each absorbing circuit includes first switch Td, second switch Tk, first capacitor C1, third switch Tc, first resistor
R1, second resistance R2,3rd resistor R3 and the second capacitor C2；The second switch Tk and first capacitor C1 constitutes the first series connection branch
Road, the 3rd resistor R3 and the second capacitor C2 parallel connection constitute the first parallel branch, the third switch Tc, the first parallel branch
The second series arm is followed in series to form with second resistance R2, and first series arm and the second series arm parallel connection constitute the
Two parallel branches, the first switch Td, first resistor R1 and the second parallel branch are sequentially connected in series.
2. the permanent magnet synchronous motor control device of high driving conversion speed as described in claim 1, which is characterized in that Mei Geshang
Bridge arm includes the first switch group and second switch group being arranged in parallel, and the first switch group is gone here and there by the first IGBT and the 2nd IGBT
Join, the second switch group is connected in series by the 3rd IGBT and the 4th IGBT, and the input terminal and direct current of the upper bridge arm are female
The connection of line positive terminal, the output end of the upper bridge arm are connect with stator winding described in a wherein phase；
Each lower bridge arm includes the third switching group and the 4th switching group being arranged in parallel, the third switching group by the 5th IGBT and
6th IGBT is connected in series, and the 4th switching group is connected in series by the 7th IGBT and the 8th IGBT, the input of the lower bridge arm
End is connect with stator winding described in a wherein phase, and the output end of the lower bridge arm is connect with DC bus negative pole end.
3. the permanent magnet synchronous motor control device of driving conversion speed as claimed in claim 2 high, which is characterized in that described the
The emitter of four IGBT is connect with the collector of the 5th IGBT, and the collector of the 4th IGBT is with the 5th IGBT's
Emitter connection.
4. the permanent magnet synchronous motor control device of high driving conversion speed as claimed in claim 3, which is characterized in that Ge Gesuo
The structure for stating absorbing circuit is consistent, and the absorbing circuit further includes first diode D1, and it is in parallel that anode is connected to described second
The output end of branch.
5. the permanent magnet synchronous motor control device of driving conversion speed as claimed in claim 4 high, which is characterized in that described the
The input terminal of one switch Td connects the first end or second end of each stator winding, the output end warp of the first switch Td
The input terminal that the first resistor R1 connects second parallel branch is crossed, the cathode of the first diode D1 connects each institute
State the first end or second end of stator winding.
6. the permanent magnet synchronous motor control device of high driving conversion speed as claimed in claim 5, which is characterized in that the suction
Receive circuit further include the second diode D2, connect with the second capacitor C2, the input terminal of the third switch Tc with it is described
The output end of first resistor R1 connection, the third switch Tc is separately connected the 3rd resistor R3 first end and the described 2nd 2
The anode tap of pole pipe D2, the 3rd resistor R3 second end are connect with the second resistance R2 first end, second diode
The cathode terminal of D2 is connect by the second capacitor C2 with the second resistance R2 first end.
7. the permanent magnet synchronous motor control device of driving conversion speed as claimed in claim 6 high, which is characterized in that described the
One both ends capacitor C1 parallel connection, one third series arm, the third series arm includes the 4th resistance R4 and the 4th being serially connected
Switch Tp, the input terminal of the second switch Tk are connect with the first resistor R1, the output end and warp of the second switch Tk
The first capacitor C1 is crossed to connect with the anode tap of the first diode D1；The first end of the 4th resistance R4 and described the
The output end of two switch Tk connects, and the second end of the 4th resistance R4 is connect with the input terminal of the 4th switch Tp, described
The output end of 4th switch Tp is connect with the anode tap of the first diode D1.
8. the permanent magnet synchronous motor control device of high driving conversion speed as claimed in claim 7, which is characterized in that the suction
Receiving circuit further includes third diode D3, is connected between the second diode D2 and the 4th resistance R4, the described 3rd 2
The anode of pole pipe D3 is connect with the cathode of the second diode D2, the cathode and the 4th resistance of the third diode D3
The first end of R4 connects.
9. the permanent magnet synchronous motor control device of high driving conversion speed as described in claim 1, which is characterized in that further include
One voltage comparator, non-inverting input terminal connect the 3rd resistor R3 both end voltage, the anti-phase input of the voltage comparator
End connects the second capacitor C2 both end voltage, output end and described second on the absorbing circuit of place of the voltage comparator
The control terminal of switch Tk connects；The second switch Tk is a normally closed controllable switch, and the resistance value of the second resistance R2 is third
5-10 times of resistance R3 resistance value.
10. the control method of permanent magnet synchronous motor control as claimed in claim 8, which is characterized in that include the following steps：
Step 1: in the corresponding upper bridge arm conducting of control and lower bridge arm turn off process, calculate lower bridge arm from triggering disconnect the moment to
Interval time TA between corresponding stator winding current zero-acrross ing moment, controls the lower bridge arm and corresponds to stator winding both ends Opposite direction connection
One absorbing circuit, while the absorbing circuit at stator winding both ends is performed the following operation：It is respectively closed first switch Td, second
Switch Tk and third switch Tc, real-time monitoring 3rd resistor R3 and the second capacitor C2 both end voltage, when the second both ends capacitor C2 electricity
When pressure is greater than 3rd resistor R3 both end voltage, then second switch Tk disconnection is controlled；After the TA time, it is each turned off first switch
Td and third switch Tc is closed at the 4th switch Tp, by first by the absorbing circuit from two tip cut-off of stator winding
Electric energy release in capacitor C1 and the second capacitor C2；
Step 2: in the corresponding upper bridge arm shutdown of control and lower bridge arm turn on process, calculatings in bridge arm from trigger the disconnection moment to
Interval time TB between corresponding stator winding current zero-acrross ing moment controls bridge arm on this and corresponds to the connection of stator winding both ends forward direction
One absorbing circuit, while the absorbing circuit at stator winding both ends is performed the following operation：It is respectively closed first switch Td, second
Switch Tk and third switch Tc, real-time monitoring 3rd resistor R3 and the second capacitor C2 both end voltage, when the second both ends capacitor C2 electricity
When pressure is greater than 3rd resistor R3 both end voltage, then second switch Tk disconnection is controlled；After the TB time, it is each turned off first switch
Td and third switch Tc is closed at the 4th switch Tp, by first by the absorbing circuit from two tip cut-off of stator winding
Electric energy release in capacitor C1 and the second capacitor C2.
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| CN201810863879.0A CN108900133B (en) | 2018-08-01 | 2018-08-01 | Permanent magnet synchronous motor control device and method with high driving conversion speed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109143064A (en) * | 2018-08-01 | 2019-01-04 | 浙江东方机电有限公司 | Counter electromotive force test device and method in permanent magnet synchronous motor commutation process |
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| CN102916637A (en) * | 2012-11-08 | 2013-02-06 | 沈阳创达技术交易市场有限公司 | Bridge type driving and resistor, capacitor and diode (RCD) buffering circuit of brushless direct current motor |
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| CN109143064B (en) * | 2018-08-01 | 2020-11-24 | 浙江东方机电有限公司 | Counter electromotive force testing device and method in reversing process of permanent magnet synchronous motor |
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| CN108900133B (en) | 2020-10-30 |
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