CN109617459A - A kind of permanent magnet synchronous electric motor driving power plate circuit and its design method - Google Patents
A kind of permanent magnet synchronous electric motor driving power plate circuit and its design method Download PDFInfo
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- CN109617459A CN109617459A CN201811622819.6A CN201811622819A CN109617459A CN 109617459 A CN109617459 A CN 109617459A CN 201811622819 A CN201811622819 A CN 201811622819A CN 109617459 A CN109617459 A CN 109617459A
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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
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
- H02P6/085—Arrangements for controlling the speed or torque of a single motor in a bridge configuration
Abstract
The invention discloses a kind of permanent magnet synchronous electric motor driving power plate circuit and its design methods, include rectification and filter module, IPM power circuitry module, IPM drive circuit module, busbar voltage acquisition circuit module, electric machine phase current acquisition circuit module, power supply circuit module, protection circuit module and signal transmission interface circuit；The alternating current of input obtains DC bus-bar voltage under the action of rectification and filter module, which inputs as the direct current of IPM power module, provides the DC power supply of inversion；The turn-on and turn-off signal of the IGBT pipe of IPM power module is inputted by IPM driving circuit；Power supply circuit provides required power supply for power board chip and IPM power module；Collected signal is transferred to control chip by busbar voltage Acquisition Circuit and electric machine phase current Acquisition Circuit；When control chip detects circuit abnormality, control starting protection circuit work turns off IPM driving circuit；Signal transmission interface circuit and electric machine controller carry out information exchange.
Description
Technical field
The present invention relates to PMSM Speed control technology fields, relate generally to a kind of permanent magnet synchronous motor driving electricity
Road and it is related to method, while has write the host computer procedure communicated with using C# language.
Background technique
Permanent magnet synchronous motor replaces conventional asynchronous because having high power density, high efficiency, high reliability
Servo-system obtains relatively broad application in fields such as industrial robot, aerospace, industry manufactures.
Currently, various advanced control algolithms are in the practical application in industry control system to permanent magnet synchronous motor
It is widely used, the control performance of permanent magnet synchronous motor obtains huge raising, and advanced control algolithm is to raising permanent magnet synchronous electric
The performance of machine plays important function.Currently, more commonly used is all that permanent magnetism is same in the research to PMSM Speed
Walk motor variable-frequency speed-regulating control system, therefore, to the driver hardware of permanent magnet synchronous motor studied very it is necessary to.Permanent magnetism
Synchronous machine drives are strong and weak electricity hybrid systems, so electrical isolation must be used.Therefore, the driver of permanent magnet synchronous motor is
It is made of power driving device and control panel.The control algolithm that control panel generally realizes whole system by dsp chip is core, leads to
SVPWM algorithm is crossed to provide PWM wave for power driving device.Meanwhile control panel is also responsible for the detection letter from power driving device
It number is improved to be used to monitor the normal operation of power driving device, receives the motor rotor position information that orthogonal encoder transmits
To be used to calculate motor speed, also it is responsible for the functions such as the communication with host computer.
Power driving device provides different corresponding three intersections primarily to realization power conversion for the different rotating speeds of motor
Galvanic electricity source.Currently, the various control algolithm Research Literatures to permanent magnet synchronous motor are more, to the driving circuit of permanent magnet synchronous motor
Design it is also fewer.On this basis, the present invention devises the driving circuit of permanent magnet synchronous motor and carries out driving analysis.
Summary of the invention
It is an object of the invention to propose a kind of driving power plate circuit design of permanent magnet synchronous motor, while benefit
Motor is directly controlled with the host computer procedure write, replaces the method for traditional switch button control motor.The present invention is with small
Power permanent magnetic synchronous motor is controlled device, the permanent magnet synchronous motor nameplate major parameter are as follows: rated power 750W, voltage rating
220V, rated current 4.2A analyze each circuit module role of driving power plate and mentality of designing；By
Experimental verification, the driving power plate circuit performance for the permanent magnet synchronous motor that the present invention realizes is good, versatility is good, and structure is excellent
Change.The host computer procedure communicated with is write using C# language simultaneously, which not only realizes control motor and open
Stop the function with revolving speed size, moreover it is possible to realize display revolving speed and current waveform, display numerical values recited, screenshot, automatically save motor
Tachometer value is to multiple functions such as Microsoft Excel, on-line control pid parameters.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of design method of permanent magnet synchronous electric motor driving power plate, includes the following steps:
First according to permanent magnet synchronous motor parameter is controlled, main circuit topological structure is established, it is same for the permanent magnetism of middle low power
Motor is walked, main circuit uses cross-straight-intersection for the voltage changer of topological structure, provides different frequency to permanent magnet synchronous motor
Power supply.
Further, it is determined that main circuit parameter, calculates DC bus-bar voltage grade.
DC bus-bar voltage grade is according to formula:It calculates, in formula: UNFor the specified of the permanent magnet synchronous motor
Voltage, K0The coefficient of situations such as to consider circuit loss, can generally select 1.1 or so.The design parameter of motor is substituted into formula
It can obtain:Therefore the motor DC busbar voltage is about 340V or so.
Further, former according to rectification and filtering on the basis of finding out the driving power plate DC bus-bar voltage grade
Reason determines selected rectifier and electrolytic capacitor model.
Since DC bus-bar voltage is 340V or so, consider 2 times of allowance and the fluctuation of power grid 10%, then rectification module
Voltage should not be below 750V.
The important parameter of another of rectification module is rated current.The maximum load current I of motorm, generally electric
5~6 times of machine rated current, the rated current of the motor are 4.2A, then Im5 × 4.2=21 of ≈ (A), according to reliability
It is required that the single-phase rectifier module of specified 1000V/50A can be selected there are certain allowance, to realize to 220V alternating current
Rectification function.
Since DC bus-bar voltage grade is 340V or so, there are after certain allowance, select pressure voltage to be the big of 450V
Electrolytic capacitor economical rationality.The capacity of capacitor is calculated according to following formula:
Wherein, PNFor permanent magnet synchronous motor rated power, f is mains frequency, UmaxFor the maximum value of DC bus-bar voltage,
UminFor the minimum value of DC bus-bar voltage, n is electrical source power factor, generally takes 0.9 or so, considers the wave of DC bus-bar voltage
It is dynamic, actual value is substituted into above equation, capacitance can be calculated, available C=480 μ F after calculating, in combination with reality
It is the capacitor economically feasible the most of 560 μ F that capacitance is selected on border.To sum up, therefore it selects pressure voltage for 450V, and capacitance is 560 μ F's
Electrolytic capacitor realizes the filter function of DC bus side.
Further, on the basis of finding out the driving power plate DC bus-bar voltage grade, the IPM of suitable types is selected
Power device, the power device are PS21865-AP.According to DC bus-bar voltage grade, the inverter switching device electricity of the circuit is determined
Pressure.Inverter circuit is the three-phase bridge type converter using 6 full-controlled switch IGBT composition.Selection for IGBT pipe, it should
Meet the collector current I of IGBT pipeCAnd the saturation voltage U between the collector and emitter of IGBT pipeCESRequirement.
The collector current I of IGBT pipeCIt should be calculated with meeting the maximum current value being likely to occur, it may be assumed that
COEFFICIENT K in formula1About 3, INFor the rated current of motor, it is available to substitute into specific parameter calculating
Saturation voltage U between the collector and emitter of IGBT pipeCESChoose should according to DC bus-bar voltage etc.
Grade is chosen, and knows that DC bus-bar voltage grade is 340V by claim 3, there are certain allowance, UCESWhen for 600V
IGBT meets actual requirement.
In order to simplify design, while guaranteeing the reliability of driving circuit, 6 are replaced using intelligent power module
The inverter bridge of IGBT pipe composition.The design realizes the inversion to direct current using PS21865 intelligent power module, which is
It is integrated with the inverter bridge of 6 IGBT pipes composition, and is integrated with corresponding protection circuit and driving circuit etc., the U of the moduleCESFor
600V, collector current ICFor 20A, calculated value both greater than above, meets design requirement just.
Further, electric motor starting electric current is excessive in order to prevent, designs the soft starting circuit of its main circuit.
Maximum current for rectifier bridge is 50A, is calculated according to DC bus-bar voltage 340V, which is greater than 7
Ω, therefore 200 Ω/20W cement resistor can be selected.It is the relay of 24V that miniature relay, which can select power supply, using outer
Portion's+24V regulated power supply is directly powered.
Further, on the basis of determining main circuit, its chip power supply circuit is designed.
Permanent magnet synchronous electric drive circuit is the COMPLEX MIXED circuit that an existing forceful electric power has light current again, for different circuits
Module needs different DC-voltage supplies, this driving circuit mainly uses external+24V regulated power supply, then sets in driving plate
DC/DC translation circuit is counted ,+24V regulated power supply is converted into+15V power supply IPM module and is used, then+15V power supply is converted
Chip for+5V power supply to other needs+5V power drives uses, to solve driving board chip powerup issue.
Further, in order to drive the conducting of the IGBT pipe in IPM module, the driving circuit of IPM power device is designed.
Further, on the basis of determining main circuit, direct current bus voltage detecting circuit is designed, is detected signal biography
To motor control panel.
Further, on the basis of determining direct current bus voltage detecting circuit, overvoltage crowbar is designed.
Further, using Hall current sensor, its permanent magnet synchronous motor phase current sensing circuit is designed.
Further, while designing hardware circuit, the host computer procedure that can be communicated with is designed using C# language,
To control revolving speed and the start and stop of permanent magnet synchronous motor, substitution traditional switch button control method.
The beneficial effects of the present invention are:
1, the power driving circuit and design for realizing permanent magnet synchronous motor are to realize permanent magnet synchronous motor frequency control not
The theory of permanent magnet synchronous motor frequency control is applied to practice, the detection to electric machine phase current value by the hardware device that can lack
And processing, facilitate the closed-loop control for realizing permanent magnet synchronous motor.
2, power driving circuit of the present invention can be applied not only in voltage rating 220V permanent magnet synchronous motor frequency control,
It can be applied in low-voltage permanent magnet synchronous motor frequency control, such as the permanent magnet synchronous motor of voltage rating 24V；Not only may be used
To be applied in permanent magnet synchronous motor frequency control, the threephase asynchronous VF frequency control of middle low power can be applied in
On, versatility is wider.
3, the present invention is added to the circuits such as soft starting circuit, DC bus-bar voltage detection and overvoltage crowbar, improves
The reliability and safety of permanent magnet synchronous electric motor driving power plate protect the most important device IPM module of driving circuit, IPM mould
The use of block, in turn simplifies circuit design, reduces difficulty.The design of system power supply circuit is to get having arrived the straight of different numerical value
Galvanic electricity pressure, and simplify structure, and reliable and stable.
4, the design of host computer procedure facilitates the control to motor, instead of the function of oscillograph and traditional switch button
Can, simplify experimental facilities requirement.
Detailed description of the invention
Fig. 1 is the general structure schematic diagram of present invention driver circuit；
Fig. 2 is the main circuit topological structure figure of driving plate of the present invention；
Fig. 3 is that+24V the DC power supply of driving plate of the present invention is chopped into+15V circuit diagram；
Fig. 4 is that+15V the DC power supply of driving plate of the present invention is chopped into+5V circuit diagram；
Fig. 5 is the motor monophase current Acquisition Circuit figure of driving plate of the present invention；
Fig. 6 is the IPM module drive circuit diagram of driving plate of the present invention；
Fig. 7 DC bus-bar voltage collection circuit figure；
Fig. 8 DC bus-bar voltage overvoltage crowbar figure；
Fig. 9 permanent magnet synchronous motor controls host computer interface figure.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
The permasyn morot analog line driver that the present invention designs, what general structure schematic diagram inputted as shown in Figure 1:
Alternating current has obtained DC bus-bar voltage, the DC bus-bar voltage is as IPM power mould under the action of rectification and filter module
The direct current of block inputs, and provides the DC power supply of inversion；The turn-on and turn-off signal of the IGBT pipe of IPM module is by IPM driving circuit
Input；Power supply circuit is respectively that chip and IPM module provide required power supply；Busbar voltage Acquisition Circuit and electric machine phase current
Collected signal is transferred to control chip by Acquisition Circuit；When control chip detects circuit abnormality, circuit work is protected
Make, shutdown IPM output；PWM wave signal of the signal transmission interface circuit primary recipient from motor control panel, for controlling IPM
The conducting of power circuit, and by electric machine phase current collected on power driving device, busbar voltage, signal of communication etc. is transmitted to motor
Control panel controls the turn-on and turn-off of IPM power device by the dsp controller calculation process of motor control panel；Communication module is
To be connected with host computer interface, realizes its serial communication function, using 485 communication protocols, utilize MAX3485ESA chip, one end
Computer host computer is connect by DB9 serial port connecting line, on the communications pins of another dsp chip for terminating to motor control panel.
The topological structure of its main circuit (i.e. IPM power circuit) is as shown in Figure 2: the circuit uses the inversion side of cross-straight-intersection
Formula, the alternating current of input first pass through rectifier rectification and obtain direct current, and it is adjustable to obtain frequency using the inversion function of inverter
Alternating current, the exchange electricity output give motor power supply.
To rated power 750W, voltage rating 220V, rated current 4.2A be major parameter permasyn morot into
Row frequency control, which is 220V, fullwave rectification bridge selection rated value is the single-phase whole of 1000V/50A
Flow module, electrolytic capacitor filter select pressure voltage 450V, the alminium electrolytic condenser of 560 μ F of capacitance, IPM module to select PS21865 intelligence
Energy power module establishes its main circuit circuit as shown in Figure 2.
The permasyn morot analog line driver that the present invention designs, chip power supply by the way of DC-DC copped wave come
It realizes, using F2415S-2W DC-DC power module, circuit as shown in Figure 3 passes through the externally input direct current of 24V
1 foot of F2415S-2W module and 2 feet input, 5 feet and 7 foot output+15V DC power supplies, and it is dry that the capacitor in circuit plays elimination
It disturbs, the effect of filtering, resistance R28 and light emitting diode D14 play the role of signal prompt, when the direct current electricity output success of 15V
Afterwards, light emitting diode D14 normal luminous, if not shining without output.
Using LM2576S-5.0 chip ,+15V DC power supply is converted into+5V DC power supply by circuit as shown in Figure 4,
It supplies other chip power ports to use, the pin 1 of the chip connects the DC power supply of+15V, pin 3,5,6 reliable grounds, pin
The DC power supply of 2 output+5V, pin 4 are feedback pin, by the DC power supply feedback of+5V of 2 feet output to pin 4；In circuit
Inductance L3, the use of capacitor C5, C15, C17 be in order to eliminate interference, play filter action, allow LM2576S-5.0 chip more
Stable work, to obtain+5V power supply.Fig. 3 and Fig. 4 realizes the power supply to driving circuit electronic device jointly.
The permasyn morot analog line driver that the present invention designs, is detected using CS040GT Hall current sensor
Electric machine phase current size replaces traditional resistor sample rate current method, reliable performance.Circuit as shown in Figure 5, Hall current sensing
1 foot of device connects 5V DC power supply, 2 foot reliable grounds, and 3 feet are output pin, and pin exports W phase current signal by resistance R7,
I.e. CURRENT W is transmitted to motor control panel, and the capacitor in circuit plays filter action.The Acquisition Circuit figure of U phase and V phase current and
W phase is the same.
The IPM power driver circuit for the permasyn morot that the present invention designs is realized using 6N137 photo-coupler
Control panel and the strong and weak of driving plate are electrically isolated, and reach jamproof purpose, while the 6N137 photo-coupler pin 6 output
The IGBT pipe turn-on and turn-off of PWM wave driving IPM module.In the input side of 6N137 photo-coupler, wherein R45 is input lateral confinement
Leakage resistance, resistance value cause input terminal electric current excessive, influence service life, the electricity about in 500 ohms, if the resistance is not added
Resistance input is the PWM wave of control panel output, and output connects the pin 3 of 6N137；It is noted that 6N137 photo-coupler input terminal
The 5V power supply of 2 pins is individually powered by control panel, and the 5V power supply of 8 pins of output end is powered by driving plate, this is done to
Input terminal and output end carry out Phototube Coupling.Resistance R24 is the pull-up resistor of output end, if the resistance is too small, can be increased pair
The impact of power supply, there is certain interference, and the present invention takes 4.7K.6 foot of output end also needs to meet a phase inverter chip 74HC14, utilizes this
Chip carries out Schmidt's waveform shaping, and the PWM waveform for exporting it cuts down waveform burr, other 5 tunnels PWM wave closer to square wave
Driving circuit has collectively constituted IPM module drive circuit as this road；Circuit is as shown in Figure 6.
The busbar voltage Acquisition Circuit for the permasyn morot analog line driver that the present invention designs, utilizes operational amplifier
LM358 and linear optical coupling chip HCNR200 constitute DC bus-bar voltage collection circuit, as shown in fig. 7, first chip
The pin 3 of LM358 connects the common end of R57 and R56, and pin 7 connects resistance R64, and resistance R64 is connected to the pin 1 of HCNR200 again,
The pin 4,5 of HCNR200 and pin 3,4 reliable grounds of second chip LM358, after the 6 connecting resistance R67 of pin of HCNR200,
It is connected to the pin 1 of second chip LM358, the output U of the pinDCFor collected DC bus-bar voltage processing costs.Electricity
Resistance R56 and R57 constitutes series connection bleeder circuit, by the collection value of DC bus-bar voltage, is adjusted to the input voltage of chip LM358
Between 0~4V of range, input voltage are as follows:
Wherein UdcFor DC bus-bar voltage.
The left side operational amplifier of first LM358 chip is the function of realizing voltage follower, formula are as follows:
UR57=UIN+=UIN-=UOUT
Wherein UOUTFor DC bus-bar voltage UdcIt by resistance sampling, improves using LM358 amplifier chip, is transported in LM358
The output voltage of chip output is put, numerical value is equal to resistance R57On voltage value.
Remaining element constitutes HCNR200 typical circuit, which outputs and inputs voltage relationship are as follows:
Wherein, UDCFor DC bus-bar voltage UdcVoltage signal after DC bus-bar voltage collection circuit improves.K3For
Linear coefficient, for HCNR200, linear coefficient 15%, for HCNR201, linear coefficient is 5% or so；R67And R61
When equal,
UDC=K3UR57
Wherein, R67And R61Take 32K or so.
The permasyn morot analog line driver that the present invention designs, utilizes twin voltage comparator LM2903 and photo-coupler
The elements such as TLP250 and IGBT pipe constitute DC bus-bar voltage overvoltage crowbar, as shown in figure 8, DC bus-bar voltage passes through
After crossing series resistance partial pressure, the input pin 2 of the public chip termination LM2903 of resistance R6 and R4, the output pin 1 of LM2903
The pin 3 that TLP250 is met by resistance R12 and light emitting diode D3, if DC bus-bar voltage is excessive, the output of TLP250 is drawn
Foot 6,7 is by resistance R13 driving protection IGBT pipe conducting.Resistance R4、R5、R6、R11Series connection bleeder circuit is together constituted, is adopted
Collecting voltage:
When DC bus-bar voltage is less than 350V, VIN-Voltage be less than 5V, at this point, VIN-< VIN+=5 (V), at this point,
The light emitting diode of TLP250 does not work, and output pin does not drive protection IGBT pipe conducting；
When DC bus-bar voltage is more than or equal to 350V, VIN-Voltage be greater than 5V, at this point, VIN-> VIN+=5 (V),
The OUT1 foot output level 0V of LM2903；The then light emitting diode input current I of TLP250F:
At this point, the LED operation of TLP250, output pin driving protection IGBT pipe conducting.
The present invention design permasyn morot analog line driver simultaneously, write using C# language communicate with it is upper
Position machine program, the host computer is using the C# SerialPort class provided and RS485 interface for realizing the control of motor serial ports.The journey
The design procedure of sequence is to be initialized first to serial ports, design serial ports attribute, realizes the most basic function of host computer, can control
The start and stop and speed regulation of PMSM motor processed.
It in order to realize the display to revolving speed, current waveform, is realized using the Chart control that C# is provided, utilizes ' Series
Collected speed variable value is drawn as curve by sentence as series_1=new Series (" revolving speed ") ', directly upper
Position is shown on machine interface；It utilizes ' chart1.SaveImage (" d :/1.jpeg ", ChartImageFormat.Jpeg) '
Waveform diagram screenshot can be saved in computer D disk by such sentence；In order to which the numerical value such as revolving speed are imported into excel table, need
Excel software is called, it can be by the way that ' using Excel=Microsoft.Office.Interop.Excel ' sentence carries out
It calls, and other office softwares can not be installed simultaneously on computer, no person can cause to conflict, will by utilizing for Do statement
Data are imported into one by one in excel table, and follow-up data is facilitated to handle；By above functions, oscillograph can be substituted and opened
The use for closing button, reduces experimental cost, designed host computer interface is as shown in Fig. 9.
By the building of the above circuit and the creation of host computer, the design of permanent magnet synchronous electric drive circuit is completed.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of permanent magnet synchronous electric motor driving power plate circuit, which is characterized in that include rectification and filter module, IPM power electricity
Road module, IPM drive circuit module, busbar voltage acquisition circuit module, electric machine phase current acquisition circuit module, power supply circuit mould
Block, protection circuit module and signal transmission interface circuit；
The alternating current of input obtains DC bus-bar voltage, the DC bus-bar voltage conduct under the action of rectification and filter module
The direct current of IPM power module inputs, and provides the DC power supply of inversion；The turn-on and turn-off signal of the IGBT pipe of IPM power module
It is inputted by IPM driving circuit；Power supply circuit provides required power supply for power board chip and IPM power module.Busbar voltage
Collected signal is transferred to control chip by Acquisition Circuit and electric machine phase current Acquisition Circuit；When control chip detects electricity
When the exception of road, control starting protection circuit work turns off IPM driving circuit；Signal transmission interface circuit and electric machine controller into
Row information interaction.
2. a kind of permanent magnet synchronous electric motor driving power plate circuit according to claim 1, which is characterized in that the IPM function
Rate circuit, using the inverting of cross-straight-intersection, the alternating current of input first passes through rectifier rectification and obtains direct current, using inverse
The inversion function of becoming device obtains the adjustable alternating current of frequency, which powers to motor.
3. a kind of permanent magnet synchronous electric motor driving power plate circuit according to claim 1, which is characterized in that the power supply electricity
The externally input direct current of 24V is passed through by the way of DC-DC copped wave, using F2415S-2W DC-DC power module in road
1 foot of F2415S-2W module and 2 feet input, 5 feet and 7 foot output+15V DC power supplies, and it is dry that the capacitor in circuit plays elimination
The effect disturb, filtered, resistance R28 and light emitting diode D14 play the role of signal prompt, when the direct current electricity output success of 15V
Afterwards, light emitting diode D14 normal luminous, if not shining without output.
4. a kind of permanent magnet synchronous electric motor driving power plate circuit according to claim 3, which is characterized in that the power supply electricity
Road further include: utilize LM2576S-5.0 chip ,+15V DC power supply is converted into+5V DC power supply, supplies other chip powers
Port uses, and the pin 1 of the chip connects the DC power supply of+15V, and pin 3,5,6 is grounded, the DC power supply of 2 output+5V of pin,
Pin 4 is feedback pin, by the DC power supply feedback of+5V of 2 feet output to pin 4；Inductance L3 in circuit, capacitor C5,
The use of C15, C17 are to play filter action to eliminate interference, the work for making LM2576S-5.0 chip more stable, thus
To+5V power supply.
5. a kind of permanent magnet synchronous electric motor driving power plate circuit according to claim 1, which is characterized in that the motor phase
Current collection circuit module detects electric machine phase current size, Hall current sensor using CS040GT Hall current sensor
1 foot connect 5V DC power supply, 2 foot reliable grounds, 3 feet are output pin, and pin exports W phase current signal, i.e. W by resistance R7
Phase current is transmitted to motor control panel, and the capacitor in circuit plays filter action；The Acquisition Circuit and W phase current of U phase and V phase current
Acquisition Circuit is identical.
6. a kind of permanent magnet synchronous electric motor driving power plate circuit according to claim 1, which is characterized in that the IPM drives
Dynamic circuit realizes that motor control panel and the strong and weak of driving power plate are electrically isolated, while the 6N137 light using 6N137 photo-coupler
The IGBT pipe turn-on and turn-off for the PWM wave driving IPM power module that coupler pin 6 exports；In the input of 6N137 photo-coupler
Side, wherein R45 is input side current-limiting resistance, and for resistance value about in 500 ohms, resistance input is motor control panel output
PWM wave, output connect the pin 3 of 6N137；The 5V power supply of 2 pins of 6N137 photo-coupler input terminal is individually powered by control panel,
The 5V power supply of 8 pins of output end is powered by driving plate；Resistance R24 is the pull-up resistor of output end, takes 4.7K ohm；Output end
6 feet meet phase inverter chip 74HC14, carry out Schmidt's waveform shaping using the chip, make the PWM waveform of its output close to square wave.
7. a kind of permanent magnet synchronous electric motor driving power plate circuit according to claim 1, which is characterized in that the bus electricity
Acquisition Circuit is pressed, constitutes DC bus-bar voltage collection electricity using operational amplifier LM358 and linear optical coupling chip HCNR200
Road, the pin 3 of first LM358 connect the common end of R57 and R56, and pin 7 connects resistance R64, and resistance R64 is connected to HCNR200 again
Pin 1, the pin 4,5 of HCNR200 and pin 3,4 reliable grounds of second LM358；6 connecting resistance of pin of HCNR200
After R67, it is connected to the pin 1 of second LM358, the output UDC of the pin is collected DC bus-bar voltage processing costs；
Resistance R56 and R57 constitute series connection bleeder circuit, by the collection value of DC bus-bar voltage, are adjusted to the input electricity of chip LM358
It presses between 0~4V of range.
8. a kind of permanent magnet synchronous electric motor driving power plate circuit according to claim 1, which is characterized in that the protection electricity
Road constitutes DC bus-bar voltage mistake using the elements such as twin voltage comparator LM2903 and photo-coupler TLP250 and IGBT pipe
Voltage protection circuit；For DC bus-bar voltage after series resistance divides, the public chip termination LM2903's of resistance R6 and R4 is defeated
Enter pin 2, the output pin 1 of LM2903 connects the pin 3 of TLP250 by resistance R12 and light emitting diode D3；If direct current is female
Line voltage is excessive, and the output pin 6,7 of TLP250 is by resistance R13 driving protection IGBT pipe conducting；It is small in DC bus-bar voltage
When 350V, VIN-Voltage be less than 5V, at this point, VIN-< VIN+=5 (V), the light emitting diode of TLP250 do not work, output
Pin does not drive protection IGBT pipe conducting；When DC bus-bar voltage is more than or equal to 350V, VIN-Voltage be greater than 5V, at this point,
VIN-> VIN+The 1OUT foot output level 0V of=5 (V), LM2903, then the LED operation of TLP250, output pin drive
Dynamic protection IGBT pipe conducting.
9. a kind of design method of permanent magnet synchronous electric motor driving power plate circuit according to claim 1-8,
It is characterized in that, includes the following:
S1 establishes IPM power circuit topological structure, forever for middle low power first according to permanent magnet synchronous motor parameter is controlled
Magnetic-synchro motor, the circuit use cross-straight-intersection for the voltage changer of topological structure, provide different frequencies to permanent magnet synchronous motor
The power supply of rate；
S2 determines IPM power circuit parameter, calculates DC bus-bar voltage grade；
S3, on the basis of finding out the driving power plate DC bus-bar voltage grade, according to rectification and filtering principle, determine selected by
Rectifier and electrolytic capacitor model；
S4 selects the IPM power device of suitable types on the basis of finding out the driving power plate DC bus-bar voltage grade；
According to DC bus-bar voltage grade, the inverter switching device voltage of the circuit is determined；
S5, electric motor starting electric current is excessive in order to prevent, designs the soft starting circuit of its main circuit；
S6 designs its power supply circuit on the basis of determining main circuit；
S7 designs the driving circuit of IPM power device to drive the conducting of the IGBT pipe in IPM module；
S8 designs direct current bus voltage detecting circuit, is detected signal and be transmitted to motor control on the basis of determining main circuit
Plate；
S9 designs overvoltage crowbar on the basis of determining direct current bus voltage detecting circuit；
S10 designs its permanent magnet synchronous motor phase current sensing circuit using Hall current sensor.
10. a kind of design method of permanent magnet synchronous electric motor driving power plate circuit according to claim 9, feature exist
In, further includes: S11 designs the host computer procedure that can be communicated with using C# language while designing hardware circuit, comes
Revolving speed and the start and stop for controlling permanent magnet synchronous motor, replace traditional switch button control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811622819.6A CN109617459A (en) | 2018-12-28 | 2018-12-28 | A kind of permanent magnet synchronous electric motor driving power plate circuit and its design method |
Applications Claiming Priority (1)
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| CN116760332A (en) * | 2023-06-08 | 2023-09-15 | 青岛云集控制技术有限公司 | Motor controller for shielding pump |
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Application publication date: 20190412 |