CN209299166U - Permanent-magnet brushless DC electric machine speed regulation device - Google Patents
Permanent-magnet brushless DC electric machine speed regulation device Download PDFInfo
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- CN209299166U CN209299166U CN201822021315.0U CN201822021315U CN209299166U CN 209299166 U CN209299166 U CN 209299166U CN 201822021315 U CN201822021315 U CN 201822021315U CN 209299166 U CN209299166 U CN 209299166U
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Abstract
The utility model discloses a kind of permanent-magnet brushless DC electric machine speed regulation devices, including cross-straight-intersection current-mode converter, cross-straight-intersection current-mode converter is connect with power inverter, power inverter is connect with permanent magnet DC motor, position sensor is installed, position sensor is connect with controller on permanent magnet DC motor；Cross-straight-intersection current-mode converter is also connect with current sensor, and current sensor is connect with controller；The I/O interface of controller is connect with cross-straight-intersection current-mode converter；Driving circuit is connected between controller and power inverter.The utility model further improves the dynamic responding speed of speed regulation device using revolving speed, the control strategy of current double closed-loop to obtain more excellent stable state and dynamic property performance.
Description
Technical field
The utility model belongs to electric motors, more specifically to a kind of permanent-magnet brushless DC electric machine speed regulation device.
Background technique
For motor as electromechanical energy conversion device, application has spread the every field of national economy and the day of people
Often in life, motor main Types have a synchronous motor, asynchronous motor, and three kinds of direct current generator.It is well known that direct current drive
Machine has many advantages, such as operational efficiency height and good speed adjustment features, but Traditional DC motor uses brush, in mechanical method
Commutation, the deadly defects such as noise, spark, electromagnetic interference and the service life generated due to opposite mechanical friction be short are along with system
The shortcomings that making at high cost and maintenance difficult greatly limits its application range, causes most in current industrial and agricultural production
Number occasion is all made of threephase asynchronous.The progress of science and technology, continuing to bring out for new technologies and materials promote motor
Weed out the old and bring forth the new.
Permanent-magnet brushless DC electric machine is made of motor body and driver, is a kind of typical electromechanical integrated product.
Brushless motor refers to the motor of brushless and commutator (or collector ring), also known as commutatorless machine.It is born early in 19 discipline electric
When machine, the practicability motor of generation is exactly brushless form, i.e. mouse cage AC formula asynchronous motor, and this motor obtains
It is widely applied.But there are many defects that can not be overcome for asynchronous motor, so that motor technology develops slowly.In last century
Leaf has been born transistor, thus replaces the DC brushless motor of brush and commutator just to come into being using transistor commutating circuit
?.This novel brushless motor is known as electronically commutated direct current generator, it overcomes the defect of first generation brushless motor.
Permanent-magnet brushless DC electric machine is to develop to come on the basis of brush DC motors, but its driving current is not
Roll over the exchange that do not detain；Permanent-magnet brushless DC electric machine can be divided into brushless rate motor and brushless torque motor again.Generally, permanent magnetism
There are two types of the driving currents of brshless DC motor, and one is trapezoidal wave (usually " square waves "), and another kind is sine wave.Sometimes
Former DC brushless motor, latter is Specifically one kind of AC servomotor AC servo motor.With
The permanent-magnet brushless DC electric machine system of sine-wave current excitation is compared, though the permanent-magnet brushless DC electric machine of square wave current excitation system
So there is a problem of that torque ripple is relatively large, but also have the aspect of its more superiority, show: position feedback device letter
It is single, do not need position coder or rotary transformer in the permanent-magnet brushless DC electric machine using sine-wave current excitation, power
Density is higher, output torque is bigger, and control structure is simple, and motor body and the respective potentiality of electronic commutation route can be made to obtain more
It fully plays.
Utility model content
The utility model provides a kind of permanent-magnet brushless DC electric machine speed regulation device, can obtain more excellent stable state and dynamic property
Performance, and further improve the dynamic responding speed of speed regulation device.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
Design a kind of permanent-magnet brushless DC electric machine speed regulation device, including cross-straight-intersection current-mode converter, it is described hand over-it is straight-
Alternating current flow pattern frequency converter is connect with power inverter, and the power inverter is connect with permanent magnet DC motor, the Permanent magnet DC
Position sensor is installed, the position sensor is connect with controller on motor；The cross-straight-intersection current-mode converter is also
It is connect with current sensor, the current sensor is connect with controller；The I/O interface and cross-straight-intersection electric current of the controller
The connection of type frequency converter；Driving circuit is connected between the controller and power inverter.
The various pieces of permanent-magnet brushless DC electric machine speed regulation device are interrelated, coordinated operation, constitute an electromechanical
The entirety of change.
In the above scheme, the threephase stator winding of the permanent magnet DC motor uses quadrupole star-like connection mode, motor
Rotor field is trapezoidal wave, and the Hall rotor-position sensor for detecting revolving speed is installed in shaft, three are installed on base
120 ° of electrical angles of a phase difference, the Hall position of stator sensor for detecting position, three Hall position of stator sensings
Device exports position signal that three pulsewidths are 180 ° of electrical angles to controller.
In the above scheme, the cross-straight-intersection current-mode converter is by three-phase full wave rectifier circuit, charging current limiter resistance, storage
It can filter capacitor, IGBT three-phase inverter composition.
In the above scheme, the controller selects TMS320LF2812 to control chip.Control circuit with
TMS320LF2812 is the control chip of permanent-magnet brushless DC electric machine speed regulation device, participates in the control and management of whole system, and
It is adjusted for completing the digital PI of speed, current double closed-loop, the logical process of three road position signals and output six tunnel of three-phase
PWM wave.
In the above scheme, the driving circuit selects the dedicated drive module EX841 of IGBT.Driving circuit is special using IGBT
Itself also there is IGBT over-current detection and overcurrent soft switching function in addition to completing Phototube Coupling driving with drive module EX841
Can, effective overcurrent protection is carried out to each switch element.
The observation circuit being made of Hall position of stator sensor, Hall rotor-position sensor and current sensor is completed
The position of system, speed, the detection processing of electric current are that system is organically run, protection circuit complete system over-voltage, it is under-voltage,
The various fault-signals such as overcurrent, overheat diagnose defencive function automatically, it is ensured that system safely and reliably works.
The utility model selects TMS320LF2812 that there is pin CAP1, CAP2, CAP3 of capture function to pass as position
The input terminal of sensor output signal provides the location information of rotor to DSP.PWM1 ~ PWM6 pin output relevant to EVA module
As the commutation control signal of system power converter switches pipe, to realize the correct commutation of motor；This six pins directly with
The input terminal of EX841 connects.In addition, system selects input terminal of the PDPINTA pin of DSP as system protection signal, once
When system breaks down, PDPINTA pin level is lower, and all PWM output pins are respectively provided with high-impedance state, at this time an interruption
It will be generated, in addition, input terminal of the ADCIN4 as current detection signal.
The utility model controls signal ratio in closed loop feedback control, by the tach signal for reflecting motor and desired speed
Compared with, amplification after, with differential amount go correction permanent-magnet brushless DC electric machine, until by speed control within the scope of desired speed, for into
One step improves the dynamic responding speed of speed regulation device, and the utility model is using revolving speed, the control strategy of current double closed-loop, to obtain
More excellent stable state and dynamic property performance.
The utility model compared with prior art, has the advantages that
The utility model is using revolving speed, the control strategy of current double closed-loop, to obtain more excellent stable state and dynamic property performance,
Further improve the dynamic responding speed of speed regulation device.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is the schematic illustration of the utility model permanent-magnet brushless DC electric machine speed regulation device.
Specific embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, now control attached drawing is detailed
Illustrate specific embodiment of the present utility model.
As shown in Figure 1, the utility model provides a kind of permanent-magnet brushless DC electric machine speed regulation device, including main circuit, main electricity
Road is the cross-straight-intersection electricity being made of three-phase full wave rectifier circuit, charging current limiter resistance, energy storage filter capacitor, IGBT three-phase inverter
Flow pattern frequency converter.Cross-straight-intersection current-mode converter is connect with power inverter, is connected between power inverter and controller
Driving circuit, in the present embodiment, driving circuit select the dedicated drive module EX841 of IGBT, drive in addition to completing Phototube Coupling
Dynamic outer, itself also has IGBT over-current detection and overcurrent soft turn-off function, carries out effective overcurrent guarantor to each switch element
Shield.Power inverter is connect with permanent magnet DC motor, and the threephase stator winding of permanent magnet DC motor uses quadrupole star-like connection side
Formula, rotor magnetic field are trapezoidal wave, the Hall rotor-position sensor for detecting revolving speed are installed in shaft, on base
Three phase differences, 120 ° of electrical angles, the Hall position of stator sensor for detecting position are installed, three Hall position of stator pass
Sensor exports position signal that three pulsewidths are 180 ° of electrical angles to controller.Cross-straight-intersection current-mode converter is also passed with electric current
Sensor connection, current sensor are connect with controller.The I/O interface of controller is connect with cross-straight-intersection current-mode converter.
Controller selects TMS320LF2812 to control chip.Control circuit is using TMS320LF2812 as permanent magnet brushless dc
The control chip of machine speed regulation device participates in the control and management of whole system, and is used to complete speed, current double closed-loop digital
PI is adjusted, the logical process of three road position signals and the PWM wave for exporting six tunnel of three-phase.To realize above-mentioned function, such as Fig. 1 institute
Show, the utility model selects TMS320LF2812 to have pin CAP1, CAP2, CAP3 of capture function defeated as position sensor
The input terminal of signal out provides the location information of rotor to DSP.PWM1 ~ PWM6 pin output relevant to EVA module is as system
The commutation control signal of system power inverter switching tube, to realize the correct commutation of motor；This six pins are directly with EX841's
Input terminal connection.In addition, system selects input terminal of the PDPINTA pin of DSP as system protection signal, once system occurs
When failure, PDPINTA pin level is lower, and all PWM output pins are respectively provided with high-impedance state, and an interruption will be given birth at this time
At in addition, input terminal of the ADCIN4 as current detection signal.
The observation circuit being made of Hall position of stator sensor, Hall rotor-position sensor and current sensor is completed
The position of system, speed, the detection processing of electric current are that system is organically run, protection circuit complete system over-voltage, it is under-voltage,
The various fault-signals such as overcurrent, overheat diagnose defencive function automatically, it is ensured that system safely and reliably works.
The various pieces of permanent-magnet brushless DC electric machine speed regulation device are interrelated, coordinated operation, constitute an electromechanical
The entirety of change.
The utility model controls signal ratio in closed loop feedback control, by the tach signal for reflecting motor and desired speed
Compared with, amplification after, with differential amount go correction permanent-magnet brushless DC electric machine, until by speed control within the scope of desired speed, for into
One step improves the dynamic responding speed of speed regulation device, and the utility model is using revolving speed, the control strategy of current double closed-loop, to obtain
More excellent stable state and dynamic property performance.
The working principle of the utility model is as follows:
Overvoltage/undervoltage protection: over-voltage, under-voltage protection are when being directed to abnormity of power supply, main circuit voltage above or below certain numerical value
Consider.Sampling voltage is obtained by three-phase alternating current, since the light emitting diode of optocoupler importation is in current status
Lower work, only just shine when through the electric current of some strength, therefore sampling voltage higher than voltage-stabiliser tube value when optical coupler
Part will be connected, if the linearity of optocoupler is preferable, output voltage can be with input voltage linear change.The output voltage of optocoupler
Value and reference voltage generate overvoltage protection signal after being compared.Overvoltage protection action value setting valve is nominal input voltage
110%.Under-voltage protection is similar with overvoltage protection, and under-voltage protection acts 90% that setting valve is nominal input voltage.
Overheating protection: due to the long-term overlond running of system, the reasons such as environment temperature is excessively high, and cooling fan breaks down may
Cause radiator to overheat, it is excessively high and damage to eventually lead to IGBT junction temperature.Using temperature switch as temperature sensor, overheating protection
Circuit is made of the series loop that 3.3V power supply is formed with resistance and temperature switch.When radiator temperature is lower than desired temperature
When, the contact for being mounted on the temperature switch in spreader surface is in normally open, circuit output high level；Conversely, temperature is opened
The contact closure of pass, circuit output low level protect signal.
Overcurrent protection: in permanent-magnet brushless DC electric machine speed-regulating system, when electric motor starting, major loop can flow through very big rise
Streaming current, the malfunctions such as this external cause control loop, driving circuit, wrong wire distribution etc. will cause branch, short-circuit, the event such as output short-circuit
Barrier, overcurrent flow through power inverter switch element IGBT, and when short circuit occurs, curent change is very fast, and element will bear high electricity
Pressure, high current, this will quick detection of excessive current, IGBT not yet damage when voluntarily turn off.Overcurrent protection divides two class protection.
First order over-current detection and protection have driving circuit completion, using integrated drive electronics chip EX841, it can be achieved that electricity to IGBT
Stream protection.Second level over-current detection and protection examine DC side bus current by quick response Hall current sensor
It surveys, the overcurrent as caused by branch, short-circuit, direct branch, short-circuit, output short-circuit and ground short circuit etc. must can detected.
The embodiments of the present invention are described above in conjunction with attached drawing, but the utility model is not limited to
The specific embodiment stated, the above mentioned embodiment is only schematical, rather than restrictive, this field it is common
Technical staff is not departing from the utility model aims and scope of the claimed protection situation under the enlightenment of the utility model
Under, many forms can be also made, these are belonged within the protection of the utility model.
Claims (5)
1. permanent-magnet brushless DC electric machine speed regulation device, including cross-straight-intersection current-mode converter, which is characterized in that it is described hand over-it is straight-
Alternating current flow pattern frequency converter is connect with power inverter, and the power inverter is connect with permanent magnet DC motor, the Permanent magnet DC
Position sensor is installed, the position sensor is connect with controller on motor；The cross-straight-intersection current-mode converter is also
It is connect with current sensor, the current sensor is connect with controller；The I/O interface and cross-straight-intersection electric current of the controller
The connection of type frequency converter；Driving circuit is connected between the controller and power inverter.
2. permanent-magnet brushless DC electric machine speed regulation device according to claim 1, which is characterized in that the permanent magnet DC motor
Threephase stator winding use quadrupole star-like connection mode, rotor magnetic field be trapezoidal wave, in shaft installation for detecting
The Hall rotor-position sensor of revolving speed installs the Hall position of stator sensing of three phase differences, 120 ° of electrical angles on base
Device, three Hall position of stator sensors export position signal that three pulsewidths are 180 ° of electrical angles to controller.
3. permanent-magnet brushless DC electric machine speed regulation device according to claim 1, which is characterized in that the cross-straight-intersection electric current
Type frequency converter is made of three-phase full wave rectifier circuit, charging current limiter resistance, energy storage filter capacitor, IGBT three-phase inverter.
4. permanent-magnet brushless DC electric machine speed regulation device according to claim 1, which is characterized in that the controller is selected
TMS320LF2812 controls chip.
5. permanent-magnet brushless DC electric machine speed regulation device according to claim 1, which is characterized in that the driving circuit is selected
The dedicated drive module EX841 of IGBT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822021315.0U CN209299166U (en) | 2018-12-04 | 2018-12-04 | Permanent-magnet brushless DC electric machine speed regulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822021315.0U CN209299166U (en) | 2018-12-04 | 2018-12-04 | Permanent-magnet brushless DC electric machine speed regulation device |
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| Publication Number | Publication Date |
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| CN209299166U true CN209299166U (en) | 2019-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822021315.0U Active CN209299166U (en) | 2018-12-04 | 2018-12-04 | Permanent-magnet brushless DC electric machine speed regulation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366990A (en) * | 2020-11-09 | 2021-02-12 | 珠海格力电器股份有限公司 | Hall self-positioning method, device, equipment and system |
| CN113972858A (en) * | 2021-10-29 | 2022-01-25 | 丽水学院 | Permanent magnet synchronous motor operation system |
-
2018
- 2018-12-04 CN CN201822021315.0U patent/CN209299166U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366990A (en) * | 2020-11-09 | 2021-02-12 | 珠海格力电器股份有限公司 | Hall self-positioning method, device, equipment and system |
| CN113972858A (en) * | 2021-10-29 | 2022-01-25 | 丽水学院 | Permanent magnet synchronous motor operation system |
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