CN109698649A - Motor and its motor-drive circuit - Google Patents
Motor and its motor-drive circuit Download PDFInfo
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- CN109698649A CN109698649A CN201710996120.5A CN201710996120A CN109698649A CN 109698649 A CN109698649 A CN 109698649A CN 201710996120 A CN201710996120 A CN 201710996120A CN 109698649 A CN109698649 A CN 109698649A
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- motor
- current
- current switch
- switch
- controllable bidirectional
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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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/20—Arrangements for starting
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
A kind of motor-drive circuit, for the p-m rotor for driving motor relative to stator rotation, the stator includes stator core and the stator winding that is wound on the stator core.The motor-drive circuit includes control unit, the first controllable bidirectional alternating-current switch, the second controllable bidirectional alternating-current switch and AC power source, first and second described controllable bidirectional alternating-current switch and the connection type of stator winding and AC power source are configured as: described control unit is by controlling the conducting and shutdown of the first controllable bidirectional alternating-current switch and the second controllable bidirectional alternating-current switch, so that the electric motor starting stage electric current that flows through the stator winding is greater than the electric current that the motor operation stage flows through the stator winding.The present invention also provides the motors of the application motor-drive circuit.Starting torque when above-mentioned motor and its motor-drive circuit can improve electric motor starting can reduce current of electric to drive the load having compared with large rotating inertia, and after loading successfully rotation to save the energy.
Description
Technical field
The present invention relates to a kind of motor and its motor-drive circuits.
Background technique
When the rotary inertia of load (such as exhaust fan, ventilation blower) is larger, motor needs to have at the start biggish
Starting torque can just overcome the relatively large rotating inertia of heavy load, to drive load.Biggish initial motor electric current is capable of providing
Bigger starting torque.When starting torque when electric motor starting is not big enough, motor, which is only used for driving, has smaller rotation used
The load of amount.But when load starts turning, after angular momentum is established, just It is not necessary to keep inputting this high current, so working as
After loading successfully rotation, it is necessary to reduce current of electric to save the energy.
Summary of the invention
In view of the foregoing, it is necessary to provide one kind with larger starting torque and after loading successfully rotation, can reduce
Current of electric is to save the motor-drive circuit of the energy.
It there is a need to provide a kind of motor using above-mentioned motor-drive circuit.
The embodiment of the present invention provides a kind of motor-drive circuit, and the p-m rotor for driving motor turns relative to stator
Dynamic, the stator includes stator winding, and the motor-drive circuit includes control unit, the first controllable bidirectional alternating-current switch, the
Two controllable bidirectional alternating-current switch and AC power source, first and second described controllable bidirectional alternating-current switch and stator winding and alternating current
The connection type in source is configured as: described control unit is by controlling the first controllable bidirectional alternating-current switch and second controllable pair
Conducting and shutdown to alternating-current switch, so that the electric current that the electric motor starting stage flows through the stator winding is greater than the motor
Operation phase flows through the electric current of the stator winding.
The embodiment of the present invention also provides a kind of motor-drive circuit, and the p-m rotor for driving motor is relative to stator
Rotation, the stator winding include actuating coil and actuating coil, and the impedance of the actuating coil is less than the actuating coil
Impedance, the motor-drive circuit include control unit, the first controllable bidirectional alternating-current switch, the second controllable bidirectional alternating-current switch and
AC power source, described control unit is by controlling the first controllable bidirectional alternating-current switch and the second controllable bidirectional alternating-current switch
Conducting and shutdown make only have actuating coil to have electric current to flow through in two coils of stator winding described in the electric motor starting stage,
At least actuating coil has electric current to flow through in two coils of stator winding described in the motor operation stage.
The embodiment of the present invention also provides a kind of motor, including stator, p-m rotor and as above described in any item is used for
Drive the p-m rotor relative to the motor-drive circuit of the stator rotation；The motor is permanent magnet AC motor.
As a preferred embodiment, the motor is permanent magnet synchronous motor or permanent magnetism BLDC motor.
Compared to the prior art, the electronic switching element in motor and its motor-drive circuit of the present invention by switching so that
The electric current that the stator winding is flowed through when the electric motor starting is greater than the electricity that the electric motor starting flows through the stator winding later
Stream, so that making the p-m rotor at the start has biggish starting torque, and then enables the motor in the starting of moment
Driving has the load compared with large rotating inertia in the process.
Detailed description of the invention
Fig. 1 schematically shows the motor in the embodiment of the present invention.
Fig. 2 is the functional block diagram of the first embodiment of motor-drive circuit of the present invention.
Fig. 3 is the functional block diagram of the second embodiment of motor-drive circuit of the present invention.
Fig. 4 is the circuit block diagram of the third embodiment of motor-drive circuit of the present invention.
Fig. 5 is the physical circuit figure of motor-drive circuit shown in Fig. 4.
Fig. 6 is the circuit diagram of the 4th embodiment of motor-drive circuit of the present invention.
Fig. 7 is the circuit diagram of the 5th embodiment of motor-drive circuit of the present invention.
Fig. 8 is the circuit diagram of motor-drive circuit sixth embodiment of the present invention.
Fig. 9 is the waveform diagram of electric current in actuating coil and actuating coil in Fig. 5.
Figure 10 is the circuit diagram of the 7th embodiment of motor-drive circuit of the present invention.
Figure 11 is the circuit diagram of the 8th embodiment of motor-drive circuit of the present invention.
Main element symbol description
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.In the absence of conflict, the feature in following embodiment and embodiment can
To be combined with each other.
It should be noted that in the present invention, when a component is considered as with another component " being connected ", it can be with
It is to be connected directly with another component, is also possible to be indirectly connected by component placed in the middle and another component.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
Referring to Fig. 1, Fig. 1 schematically shows the motor 10 in the present invention.The motor 10 includes stator and rotatable
Ground is set to the p-m rotor 300 between the magnetic pole of the stator.The stator includes stator core 200 and is wound in the stator
Stator winding 260 on magnetic core 200.The motor 10 is permanent magnet AC motor, such as synchronous motor or BLDC motor.It is described
Motor 10 can be used for that blower, water pump etc. is driven to load.
There is non-uniform gap 18, so that the permanent magnetism turns between the magnetic pole of stator and the magnetic pole of the p-m rotor 300
Polar axis S one angle [alpha] of offset of its polar axis R relative to stator when static of son 300.The configuration can guarantee the stator winding
260 p-m rotors 300 when being powered every time have fixed start position.Wherein the polar axis R of the p-m rotor 300 refer to through
Cross the virtual line at diametrically opposite two symmetric poles (i.e. two blocks of magnet in the present embodiment) center of rotor, the pole of stator
Axis S refers to the virtual line at the diametrically opposite two symmetrical pole portions center by stator.Stator and the p-m rotor in Fig. 1
300 all have two magnetic poles, and the non-uniform gap 18 between the magnetic pole of stator and the magnetic pole of the p-m rotor 300 is along rotor
Starting direction is gradually reduced.In another embodiment, polar arc face and the rotor that stator poles portion can be set are concentric, thus between being formed
Away from equal main air gap, the starting slot of indent is set on polar arc face, to form spacing between slot and the outer surface of rotor starting
Not equal non-uniform gap.It should be understood that stator and the p-m rotor 300 also can have more in more embodiments
More magnetic poles, such as four, six etc..
The position sensing for detecting rotor field is equipped on stator or close to the position of the p-m rotor 300 in stator
Device 114, the polar axis S of 114 relative stator of position sensor deviate an angle, and preferably deviation angle is also α in this example.
Referring to Fig. 2, Fig. 2 is the circuit diagram of the first embodiment of motor-drive circuit 100 of the invention.The electricity
Machine 10 further includes driving the p-m rotor 300 relative to the motor-drive circuit 100 of the stator rotation.The motor driven
Circuit 100 is opened including stator winding 260, control unit 110, the first controllable bidirectional alternating-current switch 130, the exchange of the second controllable bidirectional
Close 160 and AC power source 190.Described control unit 110, first and second controllable bidirectional alternating-current switch 130,160 and stator around
The connection type of group 260 and AC power source 190 is configured as: described control unit 110 is by controlling first controllable bidirectional
The conducting and shutdown of alternating-current switch 130 and the second controllable bidirectional alternating-current switch 160, so that 10 starting stage of the motor is constituted
Circuit described in the impedance of stator winding 260 be less than the circuit that is constituted of operation phase after 10 starting stage of motor
Described in stator winding 260 impedance, i.e., the electric current that described 10 starting stage of motor flows through the stator winding 260 is greater than described
Motor 10 flows through the electric current of the stator winding 260 after starting, to make the p-m rotor 300 at the start with larger
Starting torque.
It is appreciated that the AC power source 190 can be mains supply, the mains supplies such as example, 120V (volt), 230V；
The AC power source 190 can also be the other AC power sources provided by elements such as inverters.For example, when the motor 10 is forever
When magnetic-synchro motor, the AC power source 190 is mains supply, is also possible to the AC power source (synchronous motor of inverter output
It can be driven, can also be driven by the frequency conversion bipolar voltage that direct current to AC inverter generates by 60Hz or 50Hz AC power source)；
When the motor 10 is permanent magnetism BLDC motor, the AC power source 190 is the AC power source of inverter output.Described first and
Second controllable bidirectional alternating-current switch 130,160 be preferably three terminal bidirectional thyristor (Triac), it will be understood that described first and
Second controllable bidirectional alternating-current switch 130,160 is not limited to three terminal bidirectional thyristor, such as can also be by two silicon of reverse parallel connection
Control rectifier is realized.The stator winding 260 includes actuating coil 262 and actuating coil 266.Described control unit 110 includes
AC-DC conversion circuit 112, position sensor 114, switch control module 116.First and second controllable bidirectional exchange
Switch 130 and 160 is connected with the switch control module 116 respectively.The first end 192 of the AC power source 190 passes through described
The of actuating coil 262, the actuating coil 266 and the second controllable bidirectional alternating-current switch 160 and the AC power source 190
Two ends 196 are connected.The first end 192 of the AC power source 190 also passes through the actuating coil 262 and first controllable bidirectional
Alternating-current switch 130 is connected with the second end 196 of the AC power source 190.
The AC-DC conversion circuit 112 is connected to AC power source 190, for converting alternating current to low-voltage direct
Electricity, and stable DC source is provided to the position sensor 114 and switch control module 116 after steady pressure treatment.It is described
Position sensor 114 is used to detect the magnetic field of the p-m rotor 300 of motor 10, and exports and represent p-m rotor 300 accordingly
The signal in magnetic field.The switch control module 116 is connect with AC-DC conversion circuit 112, position sensor 114, and with institute
State the first controllable bidirectional alternating-current switch 130 and the second controllable bidirectional alternating-current switch 160 connection.The switch control module
116 are configured as the polarity according to rotor field and the AC power source 190 obtained from AC-DC conversion circuit 112, control the
One or second controllable bidirectional alternating-current switch 130,160 switch between conducting and off state in a predefined manner, make p-m rotor
300 rotate along a predetermined direction.
Whether the first controllable bidirectional alternating-current switch 130 and the second controllable bidirectional alternating-current switch 160 work can be by described
The change situation for the rotor field that switch control module 116 is sensed according to the position sensor 114 is controlled.
When the motor 10 starts, the output of the switch control module 116 control signal triggering described first is controllable double
To alternating-current switch 130, control signal is not exported to the second controllable bidirectional alternating-current switch 160, second controllable bidirectional is handed over
It flows switch 160 to turn off, the AC power source 190 passes through the actuating coil 262 and the first controllable bidirectional alternating-current switch 130
Forming circuit, the electric current for then flowing through the actuating coil 262 is starting current, and the p-m rotor 300 is driven to overcome starting
Friction and rotary inertia between resistance, such as axis and bushing and bearing etc. start to rotate to be detached from stationary state.
When the magnetic field signal switching of the position sensor 114 sensing, motor rotates into operation phase, the switch control
Molding block 116 does not export control signal, the first controllable bidirectional alternating-current switch to the first controllable bidirectional alternating-current switch 130
The shutdown in the current over-zero flowed through, the output of the switch control module 116 control signal trigger second controllable bidirectional and hand over
Switch 160 is flowed, the AC power source 190 is controllably double by the actuating coil 262, the actuating coil 266 and described second
It is formed into a loop to alternating-current switch 160, the electric current for then flowing through the actuating coil 262 and the actuating coil 266 is work electricity
Stream.
In the above process, the conducting of first and second controllable bidirectional alternating-current switch 130,160 is opened with shutdown by described
Control module 116 is closed to control.It is the first polarity, external communication in the magnetic field for detecting the p-m rotor 300 in the present embodiment
When power supply is positive half cycle, the switch control module 116 controls the first or second controllable bidirectional alternating-current switch 130,160 and leads
It is logical；When detecting that the magnetic field of the p-m rotor 300 is the second polarity, external ac power source is negative half period, the switch control
The output control signal of molding block 116 triggers the first or second controllable bidirectional alternating-current switch 130,160 and is connected.When being not detected
The magnetic field of the p-m rotor 300 is the first polarity and external ac power source is positive half cycle, or the p-m rotor is not detected
When 300 magnetic field is the second polarity and external ac power source is negative half period, the switch control module 116 does not export control signal
The first or second controllable bidirectional alternating-current switch 130,160 is triggered to be connected.First polarity can be the pole N or the pole S, accordingly
, second polarity is the pole S or the pole N.In the embodiment of the present invention, the electric motor starting stage, only first controllable bidirectional was handed over
It flows switch 130 and controls motor commutation, in the motor operation stage, only the second controllable bidirectional alternating-current switch 160 controls motor commutation.
The actuating coil 262, motor operation stage, the circuit of composition are only included in the circuit constituted due to starting stage
In include concatenated actuating coil 262 and actuating coil 266, therefore the starting current is greater than the operating current, i.e., described
The electric current that 10 starting stage of motor flows through the stator winding 260 flows through the stator winding greater than 10 operation phase of motor
260 electric current.The high current that 10 starting stage of motor flows through the stator winding 260 is playing the p-m rotor 300
There is biggish starting torque, so as to drive the load having compared with large rotating inertia when dynamic.When load starts turning, angular momentum
After foundation, just It is not necessary to keep inputting this high current, the actuating coil 262, actuating coil 266 are accessed into circuit,
Current of electric is reduced to save the energy.
Referring to FIG. 3, the circuit diagram of the second embodiment for motor-drive circuit of the invention.Implement shown in Fig. 3
The control unit 110 of mode is identical as Fig. 2 illustrated embodiment, and details are not described herein, the difference lies in that stator described in Fig. 3
Actuating coil 262 and actuating coil 266 and first and second controllable bidirectional alternating-current switch 130,160 and friendship in winding 260
The connection relationship in galvanic electricity source 190 is different.In embodiment illustrated in fig. 3, the first end 192 of the AC power source 190 is risen by described
Moving winding 262 and the first controllable bidirectional alternating-current switch 130 are connected with the second end 196 of the AC power source 190.The friendship
The first end 192 in galvanic electricity source 190 also by the actuating coil 266 and the second controllable bidirectional alternating-current switch 160 with it is described
The second end 196 of AC power source 190 is connected.First and second described controllable bidirectional alternating-current switch 130 and 160 respectively with the control
Unit 110 processed is connected.
In the electric motor starting stage, described control unit 110 makes the first controllable bidirectional alternating-current switch 130 work, described
The shutdown of second controllable bidirectional alternating-current switch 160, the AC power source 190 pass through the actuating coil 262 and described first controllably
Two-way exchange switch 130 is formed into a loop, and the electric current for then flowing through the actuating coil 262 is starting current；And the control
Unit 110 controls the conducting and shutdown of the first controllable bidirectional alternating-current switch 130.Enter operation after the motor 10 starts
Stage, described control unit 110 turn off the first controllable bidirectional alternating-current switch 130, and the second controllable bidirectional exchange is opened
160 work are closed, the AC power source 190 is formed back by the actuating coil 266 and the controllable bidirectional alternating-current switch 160
Road, the electric current for then flowing through the actuating coil 266 is operating current.
Since the impedance of the actuating coil 262 is less than the impedance of the actuating coil 266, the starting current is big
In the operating current, that is, the electric current that 10 starting stage of motor flows through the stator winding 260, which is greater than the motor 10, to be risen
The electric current of the stator winding 260 is flowed through after dynamic.10 starting stage of motor flows through the high current of the stator winding 260
Make the p-m rotor 300 that there is biggish starting torque at the start, so as to drive the load having compared with large rotating inertia.
When load starts turning, after angular momentum is established, in the motor operation stage, the switch control module 116 is switched over, and disconnects institute
It states actuating coil 262, the actuating coil 266 is accessed into circuit, reduce current of electric to save the energy.
It, can also be by it will be understood by those skilled in the art that the switch control module 116 can be realized by discrete component
Integrated circuit (such as ASIC, MCU, PAL, GAL, PLD) is realized.
Referring to FIG. 4, showing a kind of embodiment that the switch control module 116 is realized by discrete component.This implementation
In mode, the switch control module 116 includes an ON-OFF control circuit 118, a timer 113 and two output branches, institute
The output end that two output branches are connected to the ON-OFF control circuit 118 is stated, switch element 121,122, institute are respectively included
The state that timer 113 controls described two switch elements 121,122 respectively is stated, and then controls the first controllable bidirectional exchange
The working condition of switch 130 and the second controllable bidirectional alternating-current switch 160.The output end of the timer 113 is directly connected to described
The control terminal of switch element 121 also connects the control terminal of the switch element 122 by a phase inverter 123, in the same time,
The switch element 121 and 122 only has a conducting.The ON-OFF control circuit 118 and AC-DC conversion circuit 112, position
The connection of sensor 114 is set, and is connect through the switch element 121 with the first controllable bidirectional alternating-current switch 130, also through described
Switch element 122 is connect with the second controllable bidirectional alternating-current switch 160.The ON-OFF control circuit 118 is configured as foundation
The polarity of rotor field and the AC power source 190 obtained from AC-DC conversion circuit 112, the control first or second are controllably double
Switch between conducting and off state in a predefined manner to alternating-current switch 130,160, makes p-m rotor 300 along a predetermined direction
Rotation.
In present embodiment, whether the first controllable bidirectional alternating-current switch 130 and the second controllable bidirectional alternating-current switch 160
Work by two switch elements 121,122 in the switch control module 116 according to the timing situation of the timer 113 into
Row control.It is motor in the period that timing to the timer 113 reaches the scheduled wait time since the timer 113
Starting stage, after the timer 113 reaches the scheduled waiting time, motor enters the operation phase by starting stage.
When the motor 10 starts, the timer 113 starts timing and exports to switch member described in control signal conduction
Part 121 disconnects the switch element 122, so that the first controllable bidirectional alternating-current switch 130 is worked, second controllable bidirectional
Alternating-current switch 160 turns off, and the AC power source 190 passes through the actuating coil 262 and the first controllable bidirectional alternating-current switch
130 forming circuits, the electric current for then flowing through the actuating coil 262 is starting current, drives the p-m rotor 300 to be detached from quiet
Only state starts to rotate, and to 113 timing of timer to the scheduled waiting time, motor enters operation phase, the timing
The output control signal of device 113 turns off the switch element 121, and the switch element 122, the first controllable bidirectional exchange is connected
The shutdown in the current over-zero flowed through of switch 130, the second controllable bidirectional alternating-current switch 160 are connected, the AC power source 190
It is formed into a loop by the actuating coil 262, the actuating coil 266 and the second controllable bidirectional alternating-current switch 160, at this time
The electric current for flowing through the actuating coil 262 and the actuating coil 266 is operating current.
In the above process, the conducting of first and second controllable bidirectional alternating-current switch 130,160 is opened with shutdown by described
Control circuit 118 is closed to control.The actuating coil 262 is only included in the circuit constituted due to starting stage, the motor operation stage,
It include concatenated actuating coil 262 in the circuit of composition also including actuating coil 266, therefore the starting current is greater than described
Operating current, in this way, reducing current of electric in the motor operation stage to save the energy.
Referring to Fig. 5, Fig. 5 is the circuit diagram of a specific embodiment of motor-drive circuit shown in Fig. 4.The friendship
Stream-DC converting circuit 112 is the full bridge rectifier being made of four diodes, for converting alternating current to pulsating direct current
Electricity, the Rectified alternating current that the AC-DC conversion circuit 112 exports are provided through voltage-stabiliser tube Z1 pressure stabilizing and after capacitor C1 filtering
Stable DC source VCC is to the timer 113, position sensor 114 and switch control module 116.Those skilled in the art
For member it is appreciated that in other embodiments, the AC-DC conversion circuit 112 can also be other forms, as shown in fig. 6,
The embodiment shown only enumerates, and is not intended as limiting.The ON-OFF control circuit 118 includes resistance R3, NPN type triode
The T6 and resistance R4 being series between 118 output end of output end H1 and the ON-OFF control circuit of position sensor 114 and
Diode D5.The output end H1 of the cathode link position sensor 114 of the diode D5.The one end resistance R3 connection exchange-straight
Flow DC power supply VCC, the output end H1 of other end link position sensor 114 that conversion circuit 112 exports.NPN type triode
The output end H1 of the base stage link position sensor 114 of T6, emitter connect the anode of diode D5, collector connection exchange-
The DC power supply VCC that DC converting circuit 112 exports.In present embodiment, the position sensor 114 is Hall sensor.
The timer 113 includes a ripple counter 140, resistance R10-R12, capacitor C2, triode Q21.The line
Power end VCC connection the DC power supply VCC, counting end Count of wave counter 140 receive the clock of AC power source 50Hz or 60Hz
Signal, in present embodiment, counting end Count is straight by the pulsation of the output of resistance R11 connection AC-DC conversion circuit 112
Galvanic electricity, and Rectified alternating current is counted.In present embodiment, the output end Q6 conduct of the ripple counter 140 is selected
The output end of timer 113.The output end Q6 connects the base stage of the triode Q21, the triode by resistance R12
The emitter of collector connection count the end Count, the triode Q21 of Q21 are grounded.The switch element 121 is slow for tri-state
Device 141 is rushed, the switch element 122 is three state buffer 142, and the input terminal of three state buffer 141,142 connects the switch
The output end of control circuit 118, the output end of the three state buffer 141 connect the control of the first controllable bidirectional alternating-current switch 130
End processed, the output end of the three state buffer 142 connect the control terminal of the second controllable bidirectional alternating-current switch 160, and the tri-state is slow
The enable end for rushing device 141 is directly connected to the output end of the timer 113, and the enable end of the three state buffer 142 passes through institute
State the output end that phase inverter 123 connects the timer 113.The phase inverter 123 include a triode Q22 and resistance R21,
R22.The base stage of the triode Q22 connects the output end of the timer 113, the collection of the triode Q22 by resistance R21
Electrode is grounded by resistance R22, and the emitter of the triode Q22 connects DC power supply VCC.In present embodiment, with described
First, second controllable bidirectional alternating-current switch 130,160 be three terminal bidirectional thyristor for be illustrated.First controllable bidirectional
The first anode of alternating-current switch 130 connects the second end 196 of the AC power source 190, the first controllable bidirectional alternating-current switch
130 second plate connects the first end 192 of AC power source 190 by the actuating coil 262, and second controllable bidirectional is handed over
The first anode for flowing switch 160 connects the second end 196 of AC power source 190, and the of the second controllable bidirectional alternating-current switch 160
Two anodes connect the second plate of the first controllable bidirectional alternating-current switch 130 by the actuating coil 266.
Now the working principle of timer 113 is illustrated, timer 113 described in present embodiment uses model
The chip of MC14040B.It include 12 registers in the timer 113, each register has the output end of oneself, i.e., should
Timer 113 shares 12 output end Q1-Q12.The output of each output end default is logic low " 0 ", for example, timer
113 output end Q1 default output logic low, but at first (2 of clock signal0) failing edge switching output when occurring
Logic level, i.e., become logic high " 1 " from logic low " 0 "；The output end Q2 default output logic of timer 113
Low level, it will the 2nd of clock signal the1Switch output when a failing edge occurs, i.e., becomes " 1 " from " 0 ", other output ends
The case where Q3-Q12 and so on.Select output end Q6 as the output end of the timer 113 in present embodiment, it is described defeated
Outlet Q6 will be the 32nd (2 of clock signal the5) switching output when occurring of a failing edge.In present embodiment, it is assumed that alternating current
Source is 60Hz, 120V, and the 32nd failing edge can be 2 after timer 113 starts timing5X [1/ (2*60Hz)]=25x(1/
120Hz)=266ms or so occur, since the timer 113 timing be to this period that the 32nd failing edge occurs
The waiting time of the timer 113, in this time, the motor is in starting stage.
When electric motor starting, the timer 113 starts timing, motor according to the clock signal of AC power source 50Hz or 60Hz
In starting stage, the signal of the output end Q6 output logic low of the timer 113, the three state buffer 141
Enable end receives low level enable signal, and the three state buffer 141 is strobed, and the AC power source 190 is risen by described
Moving winding 262 and the first controllable bidirectional alternating-current switch 130 forming circuit, then flow through the electric current of the actuating coil 262
For starting current, the signal that the ON-OFF control circuit 118 exports controls described first controllable pair through the three state buffer 141
Switch between conducting and cut-off to alternating-current switch 130, to control the current direction in actuating coil 262 and drive rotor 300
It starts.It is exported after inverted 123 reverse phase of device of signal of the logic low of the output end Q6 output of the timer 113 logically high
Level to the enable end of the three state buffer 142, the three state buffer 142 is prevented from, and output is in high-impedance state.Work as timer
113 reach the scheduled waiting time, and motor enters operation phase, the logic level of the output end Q6 output of the timer 113
Switching becomes high level from low level, and the three state buffer 141 is in high-impedance state, and institute's three state buffer 142 is strobed, described
AC power source 190 is controllable double by the actuating coil 262, the actuating coil 266 and the three terminal bidirectional thyristor second
It is formed into a loop to alternating-current switch 160, the electric current for then flowing through the actuating coil 262 and the actuating coil 266 is work electricity
Stream；And the ON-OFF control circuit 118 controls the second controllable bidirectional alternating-current switch by the three state buffer 142
160 conducting and shutdown.When the output end Q6 of the timer 113 exports high level, the triode Q21 conducting will be described
The level of counting end Count drags down, and the timer 113 stops timing, and the output of the timer 113 is made to be locked in high electricity
It is flat.
It will be understood by those skilled in the art that because whether the output of position sensor 114 can be used to judge rotor
Through rotating, in other embodiments, the switch control module 116 can not include the timer, can be passed according to position
The output of sensor 114 determines whether motor enters operating status.
Referring to Fig. 6, being the circuit diagram of the 4th embodiment of motor-drive circuit of the present invention.It is described in present embodiment
The function of switch control module 116 is realized by microprocessor (MCU) 150.The microprocessor 150 includes power end VCC, voltage
Check up polarity end Op, ground terminal GND, three input/output terminal I/O1-I/O3.The microprocessor 150 passes through one or three poles respectively
Pipe Q71 and Q72 is connected with first and second described controllable bidirectional alternating-current switch 130,160.The triode Q71 and Q72 is used for
When the driving capability of the microprocessor 150 is not enough to drive the control electrode of triode ac switch, Current amplifier is carried out.Institute
Stating triode Q71, Q72 is PNP type triode.The AC-DC conversion circuit 112 is connected to the first of AC power source 190
Between end 192 and second end 196, direct current VCC is converted alternating current to, the first end 192 of the AC power source 190 passes through electricity
R71 connection polarity of voltage test side Op is hindered, is also grounded by resistance R72.The power end VCC connection of the microprocessor 150 is straight
Galvanic electricity source VCC.The input/output terminal I/O1 connects the base stage of the triode Q71, the triode Q71 by resistance R75
Emitter connect DC power supply VCC, the collector of the triode Q71 passes through resistance R77 connection first controllable bidirectional
The control electrode of alternating-current switch 130.The input/output terminal I/O2 connects the base stage of the triode Q72, institute by resistance R76
State the emitter connection DC power supply VCC of triode Q72, the collector of the triode Q72 passes through resistance R78 connection described the
The control electrode of one controllable bidirectional alternating-current switch 160.The input/output terminal I/O3 connects the output of the position sensor 114
H1 is held, the power supply of the position sensor 114 terminates DC power supply VCC, ground terminal ground connection.The first of the AC power source 190
End 192 connects the second plate of the first controllable bidirectional alternating-current switch 130 by the actuating coil 262, and described first can
Control the first anode ground connection of two-way exchange switch 130.The second plate of the first controllable bidirectional alternating-current switch 130 also passes through institute
The second plate that actuating coil 266 connects the second controllable bidirectional alternating-current switch 160 is stated, the second controllable bidirectional exchange is opened
Close 160 first anode ground connection.
The microprocessor 150 is obtained according to the input/output terminal I/O3 magnetic field signal obtained and polarity of voltage test side Op
The polarity of the AC power source obtained controls the conducting and shutdown of the first controllable bidirectional alternating-current switch 130, then flows through described rise
The electric current of moving winding 262 is starting current.After the motor 10 starts, until a scheduled waiting time, the motor enters
Operation phase, output signal, input/output terminal I/O2 output signal do not make the input/output terminal I/O1 of the microprocessor 150
The triode Q2 switches between conducting and cut-off, and then controls the second controllable bidirectional alternating-current switch 160 and realize conducting
With shutdown, the AC power source 190 is formed into a loop by the actuating coil 266 and the second controllable bidirectional alternating-current switch 130, this
When flow through the actuating coil 266 electric current be operating current.
It include the actuating coil 262, motor operation stage, in the circuit of composition in the circuit constituted due to starting stage
It include actuating coil 262 also include actuating coil 266, therefore the starting current is greater than the operating current, it so can be
The operation phase of motor reduces current of electric to save the energy.
Preferably, the microprocessor 150 further comprises zero passage detection end ZD, the first end of the AC power source 190
192 pass through resistance R74 connection zero passage detection end ZD.The microprocessor 150 detects alternating current by the zero passage detection end ZD
The zero crossing in source 190 is detected the polarity of the AC power source 190 by the polarity of voltage test side Op, can also further examined
Survey the voltage value of external ac power source 190.In the motor operation stage, the microprocessor 150 can be in the zero passage of AC power source
Postpone certain time after point and issue control signal triggering the second controllable bidirectional alternating-current switch 160 conducting, it is described fixed to be flowed through with reduction
The electric current of sub- winding and the phase difference of counter electromotive force, to improve power of motor efficiency.The time span of the delay can basis
The transient voltage value of AC power source determines.The zero passage detection end ZD can also be not directly connected the external ac power source 190
First end 192, but be directly connected to the polarity of voltage test side Op.The microprocessor 150 can not also include zero passage
Test side ZD, the polarity of voltage test side Op are also used as zero passage detection end, also the transient voltage value as detection AC power source.
The zero passage detection end and polarity of voltage test side Op of the microprocessor 150 or ASIC can also have voltage clamp circuit.Institute
State microprocessor 30 can a built-in waveform converting unit (not shown), the amplitude of external alternating voltage is centainly compared in real time
The diminution and offset of example, are converted to sine wave of the voltage value between 0~Vdd (DC voltage), if the voltage after conversion
Value is greater than Vdd/2, then illustrates that the voltage of external ac power source is positive polarity；If the voltage value after conversion is less than Vdd/2, say
The voltage of bright external ac power source is negative polarity.
Referring to Fig. 7, Fig. 7 is the circuit diagram of the 5th embodiment of motor-drive circuit of the present invention.Fig. 7 illustrated embodiment
Roughly the same with the circuit structure of Fig. 6 illustrated embodiment, difference is: in Fig. 7 illustrated embodiment, described first and
The first anode of two controllable bidirectional alternating-current switch 130,160 meets DC power supply VCC, PNP type triode Q71 shown in Fig. 6,
Q72 is replaced by NPN type triode Q91, Q92, and the base stage of the triode Q91 passes through the resistance R91 connection microprocessor
The collector of 150 input/output terminal I/O1, the triode Q91 pass through resistance R92 connection the first controllable bidirectional exchange
The control electrode of switch, the emitter ground connection of the triode Q91.The base stage of the triode Q92 passes through described in resistance R93 connection
The collector of the input/output terminal I/O2, the triode Q92 of microprocessor 150 pass through the second controllable bidirectional of resistance R94 connection
The control electrode of alternating-current switch 160, the emitter ground connection of the triode Q92.
Referring to Fig. 8, Fig. 8 is the circuit diagram of motor-drive circuit sixth embodiment of the present invention.Fig. 8 illustrated embodiment
Roughly the same with the circuit structure of Fig. 6 illustrated embodiment, difference is: in Fig. 8 illustrated embodiment, the microprocessor
150 further include input/output terminal I/O4, and triode Q71 and Q72 used in I/O5, Fig. 6 are respectively by 81 He of three state buffer
82 replacements.The enable end of the three state buffer 81,82 is separately connected input/output terminal I/O4, I/ of the microprocessor 150
O5, the input terminal of the three state buffer 81 connect the input/output terminal I/O1 of the microprocessor 150, the Three-State
The output end of device 81 connects the control terminal of the first controllable bidirectional alternating-current switch 130, the three state buffer by resistance R81
82 input terminal connects the input/output terminal I/O2 of the microprocessor 150, and the output end of the three state buffer 81 passes through electricity
Resistance R82 connects the control terminal of the second controllable bidirectional alternating-current switch 160.In present embodiment, when abnormal need tightly occurs in motor
When emergency stop is stopped, the input/output terminal I/O4 and I/O5 of the microprocessor 150 output signal to the three state buffer 81,82
Enable end, so that the three state buffer 81,82 is left the motor off work in high-impedance state, play the role of protecting motor.
Although actuating coil 262 and actuating coil 266 and first in the above embodiments, in the stator winding 260
And second controllable bidirectional alternating-current switch 130,160 and AC power source 190 connection relationship be in the manner shown in figure 2 for come
It is illustrated, it will be appreciated by a person skilled in the art that the different embodiments of above-mentioned control unit 110 are equally applicable to
Control connection relationship motor as shown in Figure 3.
Referring to Fig. 9, waveform diagram of the Fig. 9 for electric current in actuating coil 262 in embodiment illustrated in fig. 3 and actuating coil 266.
In Fig. 9, curve L1 is the waveform diagram of the AC power source 190, and curve L2 is the waveform of electric current in the actuating coil 262
Figure, curve L3 are the waveform diagram of electric current in the actuating coil 266.As shown in Figure 9, within the T1 period, described control unit
110 export control signal to the first controllable bidirectional alternating-current switch 130 according to the magnetic field of rotor and the polarity of AC power source
Control electrode, so that 130 on or off of the first controllable bidirectional alternating-current switch.When the p-m rotor 300 rotates it
Afterwards (i.e. after the T1 period), the stopping of described control unit 110 exports trigger signal to the first controllable bidirectional alternating-current switch
130 control electrode.When the voltage of AC power source 190 reaches zero crossing, the first controllable bidirectional alternating-current switch 130 ends,
No current flows through in the actuating coil 262.Preferably, described control unit waits T2 period (Dead Time, when stagnation
Between to ensure that the first controllable bidirectional alternating-current switch 130 completely closes) afterwards motor enter the operation phase, described control unit 110
Trigger signal is exported to the control of the second controllable bidirectional alternating-current switch 160 according to the magnetic field of rotor and the polarity of AC power source
Pole, so that 160 on or off of the second controllable bidirectional alternating-current switch.
It will be understood by those skilled in the art that in some embodiments, when the ac-dc converter circuit 112 with it is described
When the second controllable bidirectional alternating-current switch parallel connection, as shown in attached drawing 10-11, it is necessary to which the dead time is set.Figure 10 is the present invention
The circuit diagram of the 7th embodiment of motor-drive circuit, the embodiment is similar with Fig. 2 illustrated embodiment, and difference exists
In it is controllable that an input terminal of the ac-dc converter circuit in described control unit connects the actuating coil 266 and described second
The node of two-way exchange switch 160.Figure 11 is the circuit diagram of the 8th embodiment of motor-drive circuit of the present invention, the embodiment
It is similar with Fig. 3 illustrated embodiment, the difference is that, an input terminal of the ac-dc converter circuit in described control unit connects
Connect the node of the actuating coil 266 and the second controllable bidirectional alternating-current switch 160.In Figure 10 and Figure 11, when second can
Two-way exchange switch conduction is controlled, the input terminal that the AC-DC changes circuit 112 is short-circuited, and power supply VCC is cut off, but described
Second controllable bidirectional alternating-current switch will constant conduction, until current of electric zero passage, the cut-off of the second controllable bidirectional alternating-current switch, electricity
Source VCC restores, and MCU detects the zero crossing of next AC power source again, is again started up second controllable bidirectional exchange
Switch, above-mentioned steps will repeat.
It is appreciated that the microprocessor 150 can judge whether the p-m rotor 300 has rotated by the following method
Come.Method one is preset the p-m rotor 300 after the actuating coil 262 energization, be can rotate by the scheduled wait time
Get up, the scheduled wait time can carry out timing by timer built-in in the microprocessor 150.Method two is led to
Position sensor is crossed to sense whether the p-m rotor 300 rotates.In other embodiments, the microprocessor 150
Other methods can be used to judge whether the p-m rotor 300 rotates.
It is appreciated that the T2 period can be the period (360 °) of the AC power source, half period (180 °), four points
One of period (90 °) etc..If the starting of the second controllable bidirectional alternating-current switch is too early, first and second controllable bidirectional alternating-current switch will
Have the turn-on time of an overlapping, it is assumed that the expected operation 300ms or more of the first controllable bidirectional alternating-current switch, to ensure motor
Effectively start, but if the starting period has been truncated in the second controllable bidirectional alternating-current switch, the second controllable bidirectional alternating-current switch is connected simultaneously
The short circuit AC-DC changes circuit 112, and no power supply VCC is supplied to control unit, can hand in this way because of the first controllable bidirectional
Stream switch closes too early and keeps electric motor starting abnormal, therefore the T2 period is arranged.
It is appreciated that the controllable bidirectional alternating-current switch 130 and 160 in above-described embodiment includes by metal-oxide semiconductor (MOS)
Field effect transistor, three terminal bidirectional thyristor, insulated gate bipolar transistor, bipolar junction transistor, is partly led at silicon controlled rectifier (SCR)
One of body thyratron, optic coupling element or a variety of compositions can allow the two-way electronic switch flowed through of electric current.For example, two metals
Oxide semiconductor field effect transistor constitutes controllable bidirectional alternating-current switch；Two silicon controlled rectifier (SCR)s constitute controllable bidirectional
Alternating-current switch；Two insulated gate bipolar transistors constitute controllable bidirectional alternating-current switch；Two bipolar junction transistors constitute
Controllable bidirectional alternating-current switch.
It is appreciated that the microprocessor 150 in above-described embodiment can be micro-control unit (Micro Controller
Unit, abbreviation MCU), programmable logic array integrated circuit (Programmable Array Logic Integrated
Circuit, abbreviation PALIC) chip, gate array logic integrated circuit (Gate Array Logic Integrated
Circuit, abbreviation GALIC) chip, programmable logic device integrated circuit (Programmable Logic Device
Integrated Circuit, abbreviation PLDIC) chip, field programmable gate array (Field Programmable Gate
Array, abbreviation FPGA) chip and specific integrated circuit (Application Specific Integrated Circuit, letter
Claim ASIC) one of chip or a variety of.
In general, heavy load needs large-sized motor to drive, large scale motor needs more energy, can also waste more
More energy, first and second controllable bidirectional alternating-current switch in motor 10 and its motor-drive circuit of the present invention is at micro- place
Switch operating state under the control of device 150 is managed, so that the electric current that 10 starting stage of the motor flows through the stator winding 260 is big
Operation phase after the motor 10 starting flows through the electric current of the stator winding 260, to make the p-m rotor 300
There is of short duration biggish starting torque at the start, and then it is of short duration negative compared with large rotating inertia so that the driving of motor 10 is had
It carries.After loading successfully rotation, the first controllable bidirectional alternating-current switch of shutdown can reduce current of electric to save the energy.It is not necessarily in this way
Manufacture persistently consumes large-sized motor of the energy, consumes in short-term when only needing initial and starts motor compared with multiple-energy-source, because when initial
Between it is shorter, actuating coil will not seriously heat up.Once loading Successful startup, then returns to lesser current of electric and keep motor
Rotation is to save the energy.
Embodiment of above is only used to illustrate the technical scheme of the present invention and not to limit it, although referring to embodiment of above pair
The present invention is described in detail, those skilled in the art should understand that, technical solution of the present invention can be carried out
Modification or equivalent replacement should not all be detached from the spirit and scope of technical solution of the present invention.
Claims (22)
1. a kind of motor-drive circuit, for the p-m rotor for driving motor relative to stator rotation, the stator includes stator
Winding, it is characterised in that: the motor-drive circuit includes control unit, the first controllable bidirectional alternating-current switch, second controllable pair
To alternating-current switch and AC power source, the connection of first and second described controllable bidirectional alternating-current switch and stator winding and AC power source
Mode is configured as: described control unit is opened by controlling the first controllable bidirectional alternating-current switch and the exchange of the second controllable bidirectional
The conducting and shutdown of pass, so that the electric current that the electric motor starting stage flows through the stator winding is greater than the motor operation stage
Flow through the electric current of the stator winding.
2. motor-drive circuit as described in claim 1, it is characterised in that: the stator winding includes actuating coil and work
The first end of coil, the AC power source is exchanged by the actuating coil and the first controllable bidirectional alternating-current switch with described
The second end of power supply is connected, and the first end of the AC power source also passes through the actuating coil, the actuating coil and described the
Two controllable bidirectional alternating-current switch are connected with the second end of the AC power source；
In the electric motor starting stage, described control unit makes the first controllable bidirectional alternating-current switch work, and described second is controllable double
It is turned off to alternating-current switch, the electric current for flowing through the actuating coil is starting current；
In the motor operation stage, described control unit turns off the first controllable bidirectional alternating-current switch, and described second is controllable double
It works to alternating-current switch, the electric current for flowing through the actuating coil and the actuating coil is operating current, and the starting current is big
In the operating current.
3. motor-drive circuit as described in claim 1, it is characterised in that: the stator winding includes actuating coil and work
Coil, the impedance of the actuating coil are less than the impedance of the actuating coil, and the first end of the AC power source is risen by described
Moving winding and the first controllable bidirectional alternating-current switch are connected with the second end of the AC power source, and the first of the AC power source
End is also connected by the actuating coil and the second controllable bidirectional alternating-current switch with the second end of the AC power source；
In the electric motor starting stage, described control unit makes the first controllable bidirectional alternating-current switch work, and described second is controllable double
It is turned off to alternating-current switch, the electric current for flowing through the actuating coil is starting current；
In the motor operation stage, described control unit turns off the first controllable bidirectional alternating-current switch, and described second is controllable double
It works to alternating-current switch, the electric current for flowing through the actuating coil is operating current, and the starting current is greater than the operating current.
4. motor-drive circuit as described in claim 1, it is characterised in that: described control unit further includes a timer, institute
It states timer and starts timing in electric motor starting, the stage of timing to scheduled waiting time is motor since the timer
Dynamic stage, the work of the timer first controllable bidirectional alternating-current switch described in the electric motor starting stage control are transported in motor
The work of second controllable bidirectional alternating-current switch described in row stage control.
5. motor-drive circuit as claimed in claim 4, it is characterised in that: described control unit further include position sensor and
Switch control module, the position sensor are used to detect the magnetic field of the p-m rotor, and the switch control module is configured
For the polarity of the rotor field and external ac power source detected according to the position sensor, startup stage and operation in motor
Stage controls first and second described controllable bidirectional alternating-current switch respectively and switches between conducting and off state in a predefined manner,
The stator winding is set to drag the p-m rotor along predetermined direction.
6. motor-drive circuit as claimed in claim 5, it is characterised in that: the switch control module includes switch control electricity
Road, first switching element and second switch element, the rotor magnetic that the ON-OFF control circuit is detected according to the position sensor
The polarity of field and external ac power source exports control first or second controllable bidirectional alternating-current switch in a predefined manner in its output end
The signal switched between conducting and off state, the first switching element are connected to the output end of the ON-OFF control circuit
Between the control terminal of the first controllable bidirectional alternating-current switch, the second switch element is connected to the ON-OFF control circuit
Output end and the second controllable bidirectional alternating-current switch control terminal between, the conducting of the first switch and second switch and
Off state is controlled by the timer.
7. motor-drive circuit as claimed in claim 6, it is characterised in that: the switch control module further includes a reverse phase
Device；The output end of the timer connects the control terminal of the first switching element, and the output end of the timer passes through described
Phase inverter connects the control terminal of the second switch element；Or the output end of the timer passes through described in phase inverter connection
The control terminal of first switching element, the output end of the timer connect the control terminal of the second switch element.
8. motor-drive circuit as claimed in claim 7, it is characterised in that: the first switching element and second switch element
For three state buffer.
9. motor-drive circuit as claimed in claim 4, it is characterised in that: the timer includes a ripple counter, the
One to 3rd resistor, first capacitor, the first triode；The power end of the ripple counter connects DC power supply, and it is logical to remove end
First capacitor connection DC power supply is crossed, counting end receives clock signal, the ripple counter output end connection the described 1st
The base stage of pole pipe, the collector connection count end of first triode, the emitter ground connection of first triode (Q12),
The timer starts timing when electric motor starting, reaches scheduled waiting time, the electricity of the timer output end output signal
Truncation is changed.
10. motor-drive circuit as described in claim 1, it is characterised in that: the switch control unit includes a micro process
Device, the microprocessor built-in timer, the microprocessor is according to the timing situation of the timer in the electric motor starting
The work of first controllable bidirectional alternating-current switch described in stage control, the exchange of the second controllable bidirectional described in motor operation stage control are opened
Close work, the timer starts timing in electric motor starting, since timer timing to the scheduled waiting time period
For the starting stage of motor.
11. motor-drive circuit as claimed in claim 10, it is characterised in that: the microprocessor includes the inspection of overvoltage polarity
End, the first input/output terminal and the second input/output terminal are surveyed, first input/output terminal connects first controllable bidirectional
The control terminal of alternating-current switch, second input/output terminal connects the control terminal of the second controllable bidirectional alternating-current switch, described
Microprocessor detects the polarity of voltage of external ac power source by polarity of voltage test side, and according to the voltage of external ac power source
The magnetic field of polarity and p-m rotor controls the conducting and cut-off of the first or second controllable bidirectional alternating-current switch in a predefined manner
State is to realize electronic commutation.
12. motor-drive circuit as claimed in claim 11, it is characterised in that: the first controllable bidirectional alternating-current switch is the
One three terminal bidirectional thyristor, the second controllable bidirectional alternating-current switch be the second three terminal bidirectional thyristor, it is described first and second
The first anode of three terminal bidirectional thyristor is all connected with the second end of the AC power source and ground connection, the first three terminal bidirectional crystalline substance lock
The second plate of pipe by the actuating coil connect AC power source first end, the second of the first three terminal bidirectional thyristor
Anode also passes through the second plate that the actuating coil connects the second three terminal bidirectional thyristor, and described control unit further includes
The base stage of first and second triode, first triode connects first input/output terminal, first triode
Emitter connects a DC power supply, and the collector of first triode connects the control of the first three terminal bidirectional thyristor
End；The base stage of second triode connects second input/output terminal, and the emitter connection of second triode is always
Galvanic electricity source, the collector of second triode connect the control terminal of the second three terminal bidirectional thyristor.
13. motor-drive circuit as claimed in claim 11, it is characterised in that: the first controllable bidirectional alternating-current switch is the
One three terminal bidirectional thyristor, the second controllable bidirectional alternating-current switch be the second three terminal bidirectional thyristor, it is described first and second
The first anode of three terminal bidirectional thyristor is all connected with the second end of the AC power source and ground connection, the first three terminal bidirectional crystalline substance lock
The second plate of pipe by the actuating coil connect AC power source first end, the second of the first three terminal bidirectional thyristor
Anode also passes through the second plate that the actuating coil connects the second three terminal bidirectional thyristor, and described control unit further includes
First and second three state buffer, first three state buffer be connected to the microprocessor the first input/output terminal and
Between the control terminal of first bidirectional thyristor, it is second defeated to be connected to the microprocessor for second three state buffer
Enter/between output end and the control terminal of the second three terminal bidirectional thyristor；The micro process further include third to the 5th input/
Output end, the third input/output terminal connect the position sensor, the 4th input/output terminal connection described first
The enable end of three state buffer, the 5th input/output terminal connect the enable end of second three state buffer.
14. motor-drive circuit as claimed in claim 13, it is characterised in that: when motor needs emergent stopping, the micro process
4th and the 5th input/output terminal of device outputs signal to the enable end of first and second three state buffer, makes described three
State buffer is in high-impedance state.
15. motor-drive circuit as claimed in claim 11, it is characterised in that: the first controllable bidirectional alternating-current switch is the
One three terminal bidirectional thyristor, the second controllable bidirectional alternating-current switch be the second three terminal bidirectional thyristor, it is described first and second
The first anode of three terminal bidirectional thyristor is all connected with the second end of the AC power source and connects a DC power supply, and the described 1st
The second plate of bidirectional thyristor is held to connect the first end of AC power source by the actuating coil, first three terminal bidirectional is brilliant
The second plate of brake tube also passes through the second plate that the actuating coil connects the second three terminal bidirectional thyristor, the control
Unit further includes first and second triode, first and second described triode is NPN type triode, first triode
Base stage connects first input/output terminal, the emitter ground connection of first triode, the collector of first triode
The control terminal of the first three terminal bidirectional thyristor is connected by a resistance；The base stage connection described second of second triode
Input/output terminal, the emitter ground connection of second triode, the collector of second triode are connected by another resistance
The control terminal of the second three terminal bidirectional thyristor.
16. motor-drive circuit as claimed in claim 2, it is characterised in that: the first controllable bidirectional alternating-current switch work
When, described control unit just provides to the control terminal of the first controllable bidirectional alternating-current switch or is truncated driving current；When described
When second controllable bidirectional alternating-current switch works, described control unit is just mentioned to the control terminal of the second controllable bidirectional alternating-current switch
For or truncation driving current, and such power to control terminal and the frequency of the switching frequency disconnected and the AC power source is same
Step.
17. the motor-drive circuit as described in any one of claim 2-10, it is characterised in that: first controllable bidirectional is handed over
Stream switch includes by Metal Oxide Semiconductor Field Effect Transistor, silicon controlled rectifier (SCR), triac, insulation
Grid bipolar junction transistor, bipolar junction transistor, thyristor and optic coupling element one or more compositions can allow electric current
The two-way switch flowed through；And/or
The second controllable bidirectional alternating-current switch include by Metal Oxide Semiconductor Field Effect Transistor, silicon controlled rectifier (SCR),
Triac, insulated gate bipolar transistor, bipolar junction transistor, thyristor and optic coupling element one
Kind or a variety of compositions can allow the two-way switch flowed through of electric current.
18. motor-drive circuit as described in claim 1, it is characterised in that: the starting stage of the motor and the motor
Operation phase between be spaced a dead time, in the dead time, described control unit not to it is described first and second can
It controls two-way exchange switch and sends driving pulse.
19. a kind of motor-drive circuit, the p-m rotor for driving motor is relative to stator rotation, it is characterised in that: described
Stator winding includes actuating coil and actuating coil, and the impedance of the actuating coil is less than the impedance of the actuating coil, described
Motor-drive circuit includes control unit, the first controllable bidirectional alternating-current switch, the second controllable bidirectional alternating-current switch and AC power source,
Conducting and the pass that described control unit passes through control the first controllable bidirectional alternating-current switch and the second controllable bidirectional alternating-current switch
It is disconnected, make only have actuating coil to there is electric current to flow through in two coils of stator winding described in the electric motor starting stage, the motor
At least actuating coil has electric current to flow through in two coils of stator winding described in the operation phase.
20. motor-drive circuit as claimed in claim 19, it is characterised in that:
The first end of the AC power source is opened by the actuating coil, the actuating coil and second controllable bidirectional exchange
Pass is connected with the second end of the AC power source, and the first end of the AC power source also passes through the actuating coil and described first
Controllable bidirectional alternating-current switch is connected with the second end of the AC power source；Alternatively, the first end of the AC power source is described in
Actuating coil and first controllable bidirectional exchange are connected with the second end of AC power source, and the first end of the AC power source is also logical
It crosses the actuating coil and second controllable bidirectional exchange is connected with the second end of AC power source；
In the electric motor starting, the first controllable bidirectional alternating-current switch is connected in the controller, and described second is controllable double
It is turned off to alternating-current switch, the electric current for flowing through the actuating coil is starting current；After the electric motor starting, the controller makes
The first controllable bidirectional alternating-current switch shutdown, the second controllable bidirectional alternating-current switch conducting, flows through the actuating coil
Electric current is operating current, and the starting current is greater than the operating current.
21. a kind of motor, including stator, p-m rotor and the motor-drive circuit as described in any one of claim 1~20；
The motor is permanent magnet AC motor.
22. motor as claimed in claim 21, the motor is permanent magnet synchronous motor or permanent magnetism BLDC motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710996120.5A CN109698649A (en) | 2017-10-23 | 2017-10-23 | Motor and its motor-drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710996120.5A CN109698649A (en) | 2017-10-23 | 2017-10-23 | Motor and its motor-drive circuit |
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| Publication Number | Publication Date |
|---|---|
| CN109698649A true CN109698649A (en) | 2019-04-30 |
Family
ID=66226885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710996120.5A Withdrawn CN109698649A (en) | 2017-10-23 | 2017-10-23 | Motor and its motor-drive circuit |
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| CN (1) | CN109698649A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113543437A (en) * | 2020-04-22 | 2021-10-22 | 合肥美亚光电技术股份有限公司 | X-ray generating device and medical imaging apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2149720Y (en) * | 1993-03-17 | 1993-12-15 | 邱永和 | Control device for single phase induction motor |
| CN1890869A (en) * | 2003-12-11 | 2007-01-03 | 惠而浦股份有限公司 | Starting system for a single-phase induction motor |
| CN102460939A (en) * | 2009-05-22 | 2012-05-16 | 阿塞里克股份有限公司 | Arrangement for starting a single phase induction motor |
| CN204993122U (en) * | 2015-06-18 | 2016-01-20 | 德昌电机(深圳)有限公司 | Permanent -magnet machine drive circuit |
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2017
- 2017-10-23 CN CN201710996120.5A patent/CN109698649A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2149720Y (en) * | 1993-03-17 | 1993-12-15 | 邱永和 | Control device for single phase induction motor |
| CN1890869A (en) * | 2003-12-11 | 2007-01-03 | 惠而浦股份有限公司 | Starting system for a single-phase induction motor |
| CN102460939A (en) * | 2009-05-22 | 2012-05-16 | 阿塞里克股份有限公司 | Arrangement for starting a single phase induction motor |
| CN204993122U (en) * | 2015-06-18 | 2016-01-20 | 德昌电机(深圳)有限公司 | Permanent -magnet machine drive circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113543437A (en) * | 2020-04-22 | 2021-10-22 | 合肥美亚光电技术股份有限公司 | X-ray generating device and medical imaging apparatus |
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| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190430 |
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| WW01 | Invention patent application withdrawn after publication |