CN105071716B - Double winding brshless DC motor frequency multiplication control circuit of chopping and back-emf zero-crossing examination method - Google Patents
Double winding brshless DC motor frequency multiplication control circuit of chopping and back-emf zero-crossing examination method Download PDFInfo
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- CN105071716B CN105071716B CN201510351256.1A CN201510351256A CN105071716B CN 105071716 B CN105071716 B CN 105071716B CN 201510351256 A CN201510351256 A CN 201510351256A CN 105071716 B CN105071716 B CN 105071716B
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Abstract
The present invention relates to a kind of double winding brshless DC motor frequency multiplication control circuit of chopping and back-emf zero-crossing examination method, utilize the thought of frequency multiplication wave chopping technology, with reference to New-type electric machine topological structure, phase difference be present by chopping way, can be according to the non-conduction phase terminal voltage of phase difference time sharing sampling and afterflow mode, times frequency sampling of zero crossing is realized, improves back-emf zero crossing sampling precision, and rotating speed sampling precision.Especially suitable for the high-speed brushless DC electromotor started without position.Compared with prior art, the present invention have it is following some：Utilize motor topology structure and the thought of frequency multiplication wave chopping technology, phase difference be present by chopping way, times frequency sampling of zero crossing according to the non-conduction phase terminal voltage of phase difference time sharing sampling, can be realized, improve back-emf zero crossing sampling precision, and rotating speed sampling precision.
Description
Technical field
The invention belongs to technical field of motors, it is related to a kind of double winding brshless DC motor frequency multiplication control circuit of chopping and anti-
Potential zero-crossing examination method.
Background technology
Brushless DC motor without position sensor can meet the needs of various workplaces.There is hall sensing compared to traditional
For the controller of device, this technology has the advantages of the following aspects：Sensorless Control Technique can not only save
Expensive position sensor expense, reduce motor size, save space, whole system complexity can also be reduced, avoid sensing
Commutation mistake caused by device failure, and make I＆ M more convenient.
In recent years, occur many position signalling detection methods both at home and abroad, rotor-position is sampled according to mutually powered-down
The different processing method of signal can be divided into terminal voltage method (back-emf zero crossing detection), triple-frequency harmonics method, flux observation method, with
And some intelligent methods.Wherein triple-frequency harmonics method and flux observation method, avoided as a result of the method to voltage integrating meter continuous
The influence of diode pair rotor-position estimation is flowed, is adapted to the position-sensor-free technology of permanent-magnet brushless DC electric machine, but to electricity
Hematocrit point needs high-frequency AD samplings, while increases operand, is not suitable for high-speed brushless motor control.Back-emf zero crossing
Method be terminal voltage by phase is not turned on compared with the virtual mid-point voltage calculated, it is also possible to obtain counter electromotive force
Zero crossing.This method very simple, it is also more convenient to achieve.
But in high speed must with high sample frequency to permanent-magnet brushless DC electric machine in multiple physical quantitys survey
Amount, the algorithm for then running complexity estimates rotor-position, accordingly even when using the higher controller of dominant frequency, it is also difficult to real-time
To accurate position signalling.Also, with the raising of motor speed, location-estimation algorithm is difficult to calculate current motor in time
The situation of rotor, in the case of the range of speeds is larger, the detection of position-sensor-free is difficult to.
The content of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of double winding brshless DC motor frequency multiplication copped wave control
, using the thought of frequency multiplication wave chopping technology, there is phase difference in circuit and back-emf zero-crossing examination method processed, can by chopping way
According to the non-conduction phase terminal voltage of phase difference time sharing sampling, to realize times frequency sampling of zero crossing, improve back-emf zero crossing and adopt
Sample precision, and rotating speed sampling precision.Especially suitable for the high-speed brushless DC electromotor started without position.The technology is reducing AD
Sampling number is added while sampling rate, improves the precision of high-speed electric expreess locomotive position estimation.
Technical scheme
A kind of double winding high-speed brushless DC electromotor frequency multiplication control circuit of chopping, it is characterised in that including Q1, Q2, Q3, Q4,
First inverter circuit of Q5 and Q6 compositions, the second inverter circuit of Q7, Q8, Q9, Q10, Q11 and Q12 composition, C1 bus capacitors,
C2 bus capacitors, Q14 switching switch, Q15 switching switch, R1 charge circuits resistance, R2 charge circuits resistance, Q16 switching tubes,
Tandem tap pipe Q13 between Q17 switching tubes, D1 anti-parallel diodes, D2 anti-parallel diodes and loop；First inverter circuit
The winding being connected with the first Y types is connected, and the winding that the second inverter circuit is connected with the 2nd Y types is connected, the first inverter circuit
Switching tube Q13 is concatenated between the second inverter circuit；First inverter circuit is connected to the ground by Q15, and the second inverter circuit passes through
Q14 is connected with Vcc；Q14 both ends are parallel with the charge circuit that R1, Q16 and anti-parallel diodes D1 are formed, Q15 both ends
It is parallel with the charge circuit that R2, Q17 and anti-parallel diodes D2 are formed；The bus parallel connection bus electricity of first inverter circuit
Hold C1, the bus parallel connection bus capacitor C2 of the second inverter circuit.
Described first inverter circuit Q1, Q2, Q3, Q4, Q5 and Q6, Q7, Q8, Q9, Q10, Q11 of the second inverter circuit and
Q12, and switching switch Q14 and switching switch Q15 are managed using IGBT or MOSFET.
One kind carries out back-emf zero crossing inspection using the double winding high-speed brushless DC electromotor frequency multiplication control circuit of chopping
Survey method, it is characterised in that step is as follows：
Step 1：The pwm signal applied on double winding on the first inverter circuit and the second inverter circuit, two pwm signals
With one difference of phase；
Step 2：Back-emf zero-crossing examination is carried out to double winding, sampling obtains twice of back-emf voltage data；
Step 3：By in the back-emf data collected, the data of upper tube commutation subtract 1/2VCC, the data of down tube commutation
Plus 1/2VCC, the data handled are subjected to linear fit, obtain back-emf zero crossing.
Beneficial effect
A kind of double winding brshless DC motor frequency multiplication control circuit of chopping and back-emf zero-crossing examination proposed by the present invention
Method, using the thought of frequency multiplication wave chopping technology, with reference to New-type electric machine topological structure, phase difference be present by chopping way, can be with
According to the non-conduction phase terminal voltage of phase difference time sharing sampling and afterflow mode, times frequency sampling of zero crossing is realized, improves anti-electricity
Gesture zero crossing sampling precision, and rotating speed sampling precision.Especially suitable for the high-speed brushless DC electromotor started without position.With showing
There is technology to compare, the present invention have it is following some：Using motor topology structure and the thought of frequency multiplication wave chopping technology, pass through chopping way
Phase difference be present, times frequency sampling of zero crossing according to the non-conduction phase terminal voltage of phase difference time sharing sampling, can be realized, improve anti-
Potential zero crossing sampling precision, and rotating speed sampling precision.
Brief description of the drawings
Fig. 1 is zero-crossing examination method schematic when generating electricity
Fig. 2 is non-conduction opposite potential sampling general illustration of the present invention
Fig. 3 is non-conduction opposite potential back-emf sampling partial schematic diagram of the present invention
Fig. 4 is control circuit topological diagram
Fig. 5 is four kinds of pwm signals for having differed a quarter chopping cycle successively
Embodiment
In conjunction with embodiment, accompanying drawing, the invention will be further described：
The present invention utilizes the thought of frequency multiplication wave chopping technology, with reference to New-type electric machine topological structure, phase be present by chopping way
Potential difference, times frequency sampling of zero crossing according to the non-conduction phase terminal voltage of phase difference time sharing sampling, can be realized, improve back-emf mistake
Zero sample precision, and rotating speed sampling precision.Especially suitable for the high-speed brushless DC electromotor started without position.
As shown in Figure 2, there is provided a kind of voltage over zero being combined with high-speed brushless DC electromotor frequency multiplication chopping way
Detection method.The present invention includes：Two sets of inverter circuits connect two sets of machine windings, two bus capacitors (C1, C2) respectively, two
Switching switch (Q14, Q15), two charge circuit resistance (R1, R2) and switching tube (Q16, Q17) anti-parallel diodes D1,
Tandem tap pipe Q13 between D2, and two sets of loops.
Annexation：The winding that first inverter circuit is connected with the first Y types is connected, the second inverter circuit and the 2nd Y types
The winding of connection is connected, and switching tube Q13 is concatenated between the first inverter circuit and the second inverter circuit；First inverter circuit passes through
Q15 is connected to the ground, and the second inverter circuit is connected by Q14 with Vcc；Q14 both ends are parallel with R1, Q16 and the pole of reverse parallel connection two
The charge circuit that pipe D1 is formed, Q15 both ends are parallel with the charge circuit that R2, Q17 and anti-parallel diodes D2 are formed；
The bus parallel connection bus capacitor C1 of first inverter circuit, the bus parallel connection bus capacitor C2 of the second inverter circuit.
Inverter circuit Q1, Q2, Q3, Q4, Q5 and Q6 of first inverter circuit, Q7, Q8 of the second inverter circuit, Q9,
Q10, Q11 and Q12, and switching switch Q14 and switching switch Q15 are managed using IGBT or MOSFET.
Back-emf zero-crossing examination step is carried out such as using double winding high-speed brushless DC electromotor frequency multiplication control circuit of chopping
Under：
Step 1：The pwm signal applied on double winding on the first inverter circuit and the second inverter circuit, two pwm signals
With one difference of phase；The pwm signal difference a quarter chopping cycle of two sets of control circuits in the present embodiment.
Step 2：Back-emf zero-crossing examination is carried out to double winding, sampling obtains twice of back-emf voltage data；
Step 3：By in the back-emf data collected, the data of upper tube commutation subtract 1/2VCC, the data of down tube commutation
Plus 1/2VCC, the data handled are subjected to linear fit, obtain back-emf zero crossing.
Detailed process：In view of the contradiction of the high rotating speed of motor and power device switching frequency between limited, using PWM-
The frequency multiplication discrete sampling method that ON, PWM-OFF-LOW and PWM-OFF-HIGH are combined, rotor zero passage is found by curve matching
Point, to realize the sampling of rotor-position.
The PWM-ON stages
In each cycle that power tube is opened, the amplitude of the sampling once terminal voltage of non-conduction phase (by taking A phases as an example), and with
1/2 busbar voltage compares, and when comparing triggering, the point adjacent to two carries out curve fitting, with reference to its fixation sampling period,
The zero crossing of non-conduction back-emf is obtained, 1~14 is put as shown in Fig. 2 (b), wherein A1 set windings 1,3,5 grade odd numbers cover with A2
The grade point of winding 2,4,6 has phase difference.
PWM-OFF-LOW the and PWM-OFF-HIGH stages
The chopping way that the present invention uses has the characteristics of copped wave continuous current circuit replaces afterflow in high-pressure side and low-pressure side.
Before back-EMF commutation point, the voltage collected by taking PWM-OFF-LOW as an example, during low-pressure side afterflow is high as back-emf changes
It is busbar voltage to press the voltage collected during the afterflow of side, and 23~30 (wherein A1 set windings 23~26 etc. are put as shown in Fig. 2 (b)
Point has phase difference with the A2 set grade points of winding 26~30).Collected conversely, after back-EMF commutation point, during the afterflow of high-pressure side
Voltage changes with back-emf, and the voltage collected when low-pressure side afterflow is ground voltage, and 15~22 are put as shown in Fig. 2 (b)
(wherein A1, which covers winding 15~18 and A2 set grade points of winding 19~22, phase difference).
Because on off state is controllable, by PWM_OFF phase acquisitions to voltage integrated, it is female to reject half respectively
Line voltage, pass through curve matching, it is possible to obtain commutation point., can be according to this because the copped wave of double winding has phase difference
The non-conduction phase terminal voltage of phase difference time sharing sampling, 2 times of positional information can be obtained, realize times frequency sampling of zero crossing, improved
Back-emf zero crossing sampling precision, and rotating speed sampling precision.
Claims (1)
1. one kind carries out back-emf zero-crossing examination method using double winding high-speed brushless DC electromotor frequency multiplication control circuit of chopping,
Described double winding high-speed brushless DC electromotor frequency multiplication control circuit of chopping includes the first of Q1, Q2, Q3, Q4, Q5 and Q6 composition
Inverter circuit, the second inverter circuit of Q7, Q8, Q9, Q10, Q11 and Q12 composition, C1 bus capacitors, C2 bus capacitors, Q14 are cut
Change switch, Q15 switches switch, R1 charge circuits resistance, R2 charge circuits resistance, Q16 switching tubes, Q17 switching tubes, D1 reversely simultaneously
Di- pole pipe, D2 anti-parallel diodes and switching tube Q13；The winding that first inverter circuit is connected with the first Y types is connected, the
The winding that two inverter circuits are connected with the 2nd Y types is connected, and switching tube is concatenated between the first inverter circuit and the second inverter circuit
Q13；First inverter circuit is connected to the ground by Q15, and the second inverter circuit is connected by Q14 with Vcc；Q15 both ends be parallel with R1,
The charge circuit that Q16 and anti-parallel diodes D1 are formed, Q14 both ends are parallel with R2, Q17 and anti-parallel diodes
The charge circuit that D2 is formed；The bus parallel connection bus capacitor C1 of first inverter circuit, the bus of the second inverter circuit are in parallel female
Line capacitance C2；It is characterized in that step is as follows：
Step 1：First inverter circuit and the second inverter circuit apply two pwm signals, two pwm signal tools on double winding
There is a phase difference；
Step 2：Back-emf zero-crossing examination is carried out to double winding, sampling obtains twice of back-emf voltage data；
Step 3：By in the back-emf voltage data collected, the data of upper tube commutation therein subtractDown tube commutation
Data addThe data handled are subjected to linear fit, obtain back-emf zero crossing；
Q1, Q2, Q3, Q4, Q5 and Q6 of first inverter circuit, Q7, Q8, Q9, Q10, Q11 and Q12 of the second inverter circuit,
And switching switch Q14 and switching switch Q15 are managed using IGBT or MOSFET.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510351256.1A CN105071716B (en) | 2015-06-23 | 2015-06-23 | Double winding brshless DC motor frequency multiplication control circuit of chopping and back-emf zero-crossing examination method |
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| CN201510351256.1A CN105071716B (en) | 2015-06-23 | 2015-06-23 | Double winding brshless DC motor frequency multiplication control circuit of chopping and back-emf zero-crossing examination method |
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| CN105071716B true CN105071716B (en) | 2018-02-02 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR3055759B1 (en) * | 2016-09-02 | 2020-10-30 | Mmt ag | MECHATRONIC ASSEMBLY PILOT BY A PULSE WIDTH MODULATING SIGNAL |
| CN108448956B (en) * | 2018-05-03 | 2021-08-10 | 东北大学 | Rotor position detection device of six-phase asymmetric square wave motor |
| CN108964561A (en) * | 2018-07-31 | 2018-12-07 | 河南森源重工有限公司 | A kind of control method of double three-phase machine drive system and double three-phase machine |
| CN109143064B (en) * | 2018-08-01 | 2020-11-24 | 浙江东方机电有限公司 | Counter electromotive force testing device and method in reversing process of permanent magnet synchronous motor |
| CN113899949A (en) * | 2021-08-30 | 2022-01-07 | 北京航天控制仪器研究所 | Bi-motor stator phase angle testing arrangement |
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