CN104330628B - Brushless direct current motor counter electromotive force third harmonic detection circuit - Google Patents
Brushless direct current motor counter electromotive force third harmonic detection circuit Download PDFInfo
- Publication number
- CN104330628B CN104330628B CN201410641063.5A CN201410641063A CN104330628B CN 104330628 B CN104330628 B CN 104330628B CN 201410641063 A CN201410641063 A CN 201410641063A CN 104330628 B CN104330628 B CN 104330628B
- Authority
- CN
- China
- Prior art keywords
- resistance
- power supply
- connects
- zero
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a brushless direct current motor counter electromotive force third harmonic detection circuit and relates to the field of motor control. The brushless direct current motor counter electromotive force third harmonic detection circuit aims at solving the problems that the existing counter electromotive force third harmonic detection circuit is low in signal detection accuracy, severe in signal attenuation, complex in circuit and large in motor reversing error caused by detected signals. A three-phase wire inlet end of the brushless direct current motor is respectively connected with one end of a resistor R3, one end of a resistor R4 and one end of a resistor R5; the other end of the resistor R3 is connected with the other end of the resistor R56; the other end of the resistor R4 is connected with a low pass filter; an output end of the low pass filter is connected with an input end of a voltage clamping circuit; an output end of the voltage clamping circuit is connected with an input end of a zero-crossing comparator; a zero potential fine turning circuit is connected with the input end of the zero-crossing comparator; an output end of the zero potential fine turning circuit is connected with an input end of an optoelectronic isolation circuit; an output end of the optoelectronic isolation circuit is connected with an input end of a DSP (Digital Signal Processor). The brushless direct current motor counter electromotive force third harmonic detection circuit can be applied to a motor.
Description
Technical field
The present invention relates to brushless direct-current machine counter electromotive triple-frequency harmonics testing circuit.Belong to Motor Control Field.
Background technology
Brushless electric machine no-position sensor based on counter electromotive force triple-frequency harmonics zero-crossing examination controls, and relatively has position sensing
Device controls to be compared, and can reduce the volume of motor and the cost of sensor, improve the capacity of resisting disturbance of rotor-position signal.Existing
Triple-frequency harmonics testing circuit in, the acquisition methods of triple-frequency harmonics are to take between external star-like equivalent resistance neutral point and earth terminal
Electric potential difference, carry out zero-crossing examination after bandpass filtering.This method is due to having raised counter electromotive force harmonic signal
Overall amplitude, the back electromotive force zero-crossing therefore detecting is not accurate enough, and band filter is to harmonic signal
Decay is very serious, is unsuitable for the effective detection of zero crossing.
Content of the invention
The present invention is to solve the signal detection in existing counter electromotive force triple-frequency harmonics zero-crossing detection circuit, existing
Accuracy is low, and signal attenuation is serious, and circuit is complicated, and the signal detecting leads to the big problem of motor commutation error.Now provide no
Brushless motor counter electromotive force triple-frequency harmonics testing circuit.
Brushless direct-current machine counter electromotive triple-frequency harmonics testing circuit, it includes brshless DC motor, star-like resistance, motor
DC power supply mid-point voltage, low pass filter, zero potential trimming circuit, voltage clamp circuit, zero-crossing comparator, photoelectricity
Isolation circuit and digital signal processor dsp,
Described star-like resistance includes resistance r3, resistance r4 and resistance r5,
The three-phase end of incoming cables of described brshless DC motor connects one end of resistance r3, one end of resistance r4 and resistance r5 respectively
One end, the other end of resistance r3 connects the other end of resistance r5, and the other end of resistance r4 is as the outfan of star-like resistance；
Low pass filter includes resistance r8, resistance r10 and electric capacity c2,
The outfan of star-like resistance connects one end of resistance r8, and the other end of resistance r8 is simultaneously connected with one end of resistance r10
With one end of electric capacity c2, the other end of resistance r10 connects the other end of electric capacity c2, one end of resistance r8, one end of resistance r10 and
The signal output part all as low pass filter for the one end of electric capacity c2, the other end of resistance r10 is as the signal of low pass filter
Input；
Motor DC power supply mid-point voltage includes the power supply ground of power supply, resistance r1, resistance r2 and power supply,
The signal input part of low pass filter is simultaneously connected with one end of resistance r1 and one end of resistance r2, and resistance r1's is another
End connects power supply, and the other end of resistance r2 connects the power supply ground of power supply,
Voltage clamp circuit includes the positive pole+5v of 5v power supply, diode d1, No. two diode d2 and 5v power
Negative pole-the 5v of power supply,
The signal output part of low pass filter is simultaneously connected with the anode of a diode d1 and the negative electrode of No. two diode d2,
The negative electrode of a number diode d1 connects the positive pole+5v of 5v power supply, and the anode of No. two diode d2 connects 5v power supply
The anode of negative pole -5v, a diode d1 as the signal output part of voltage clamp circuit,
Zero-crossing comparator includes the power supply ground of 5v power supply, operational amplifier u2, resistance r6 and 5v power supply,
The positive signal input part of the signal output part concatenation operation amplifier u2 of voltage clamp circuit, operational amplifier u2
Positive power source terminal be simultaneously connected with 5v power supply and one end of resistance r6, the negative power end of operational amplifier u2 connects 5v and powers electricity
The power supply ground in source, the outfan of operational amplifier u2 connects the other end of resistance r6, the negative signal input of operational amplifier u2
As the signal input part of zero-crossing comparator, one end of resistance r6 is as a signal output part of zero-crossing comparator, resistance at end
The other end of r6 as another signal output part of zero-crossing comparator,
Zero potential trimming circuit includes adjustable resistance r12, resistance r11, No. three diode d3,5v power supplies and 5v and supplies
The power supply ground of power supply,
The signal input part of zero-crossing comparator connects the adjustable end of adjustable resistance r12, and one end of adjustable resistance r12 connects simultaneously
One end of connecting resistance r11 and the anode of No. three diode d3, the other end of resistance r11 connects 5v power supply, adjustable resistance r12
The other end be simultaneously connected with the power supply ground of the negative electrode of No. three diode d3 and 5v power supply,
Photoelectric isolating circuit includes resistance r7, the photoisolator of model 6n137, electric capacity c1,5v power supply, 5v confession
The power supply ground of power supply, the power supply ground of 3.3v power supply, 3.3v power supply and resistance r9,
One signal output part of zero-crossing comparator connects one end of resistance r7, and the other end of resistance r7 connects model
No. 2 pins of the photoisolator of 6n137, No. 5 pins of the photoisolator of model 6n137 connect 3.3v power supply
Power supply ground, No. 7 pins of the photoisolator of model 6n137 be simultaneously connected with the photoisolator of model 6n137 No. 8 are drawn
Foot, one end of electric capacity c1 and 5v power supply, the other end of electric capacity c1 connects the power supply ground of 5v power supply, model 6n137
No. 6 pins of photoisolator connect one end of resistance r9, the other end of resistance r9 connects 3.3v power supply, Zero-cross comparator
Another signal output part of device connects No. 3 pins of the photoisolator of model 6n137, the photoelectricity of model 6n137 every
From device No. 6 pins as photoelectric isolating circuit signal output part,
The signal output part of photoelectric isolating circuit connects the signal input part of digital signal processor dsp.
The invention has the benefit that in the external equivalent star-like connection resistance in the three-phase end of incoming cables of brshless DC motor,
And partial pressure filter is carried out to the electric potential difference at motor DC power supply mid-point voltage m and between external star resistor neutral o
Ripple, the counter electromotive force harmonic signal zero crossing that can record through zero-crossing comparator is more accurate.Form through -5v and 5v
Voltage clamp circuit, inputs to the positive input of the zero-crossing comparator being made up of operational amplifier, to harmonic signal
Zero cross signal is detected, the trimming circuit of zero potential is used for comparing the input of current potential, and the outfan of operational amplifier is defeated
Go out the switching signal of corresponding 0v and 5v.Again through the interference at photoisolator isolation input end, the switch of output 0v and 3.3v
, to digital signal processor dsp, this circuit is simple for signal, can improve the anti-dry of rotor-position signal using photoelectric isolating circuit
Disturb ability, and there is no sensor compared with prior art so that the cost of this circuit decreases and reduces motor
Volume.In the process to triple-frequency harmonics, more simply can more accurately get triple-frequency harmonics completely using low pass filter
Signal, reduces the attenuation degree of signal, is conducive to the detection of zero crossing, adds generating positive and negative voltage clamp circuit, can effectively prevent
Voltage jump, realizes a protection well to the amplifier amplifier of model lm339.Zero potential trimming circuit, Neng Gouyou
Being modified to due to the null offset effect that operational amplifier lm339 temperature change produces of effect, makes the zero crossing detecting
Moment is more accurate, and then brshless DC motor more accurately commutates.
Brief description
Fig. 1 is that the circuit of the brushless direct-current machine counter electromotive triple-frequency harmonics testing circuit described in specific embodiment one is former
Reason figure.
Specific embodiment
Specific embodiment one: illustrate present embodiment with reference to Fig. 1, the brshless DC motor described in present embodiment
Counter electromotive force triple-frequency harmonics testing circuit, it includes brshless DC motor u1, star-like resistance 1, motor DC power supply midpoint
Voltage 2, low pass filter 3, zero potential trimming circuit 4, voltage clamp circuit 5, zero-crossing comparator 6, photoelectric isolating circuit 7 and
Digital signal processor dsp8,
Described star-like resistance 1 includes resistance r3, resistance r4 and resistance r5,
The three-phase end of incoming cables of described brshless DC motor u1 connects one end of resistance r3, one end of resistance r4 and resistance respectively
One end of r5, the other end of resistance r3 connects the other end of resistance r5, and the other end of resistance r4 is as the output of star-like resistance 1
End；
Low pass filter 3 includes resistance r8, resistance r10 and electric capacity c2,
The outfan of star-like resistance 1 connects one end of resistance r8, and the other end of resistance r8 is simultaneously connected with one end of resistance r10
With one end of electric capacity c2, the other end of resistance r10 connects the other end of electric capacity c2, one end of resistance r8, one end of resistance r10 and
The signal output part all as low pass filter 3 for the one end of electric capacity c2, the other end of resistance r10 is as the letter of low pass filter 3
Number input；
Motor DC power supply mid-point voltage 2 includes power supply, the power supply of resistance r1, resistance r2 and power supply
Ground,
The signal input part of low pass filter 3 is simultaneously connected with one end of resistance r1 and one end of resistance r2, and resistance r1's is another
One end connects power supply, and the other end of resistance r2 connects the power supply ground of power supply,
Voltage clamp circuit 5 includes the positive pole+5v of 5v power supply, diode d1, No. two diode d2 and 5v supply
Negative pole-the 5v of power supply,
The signal output part of low pass filter 3 is simultaneously connected with the anode of a diode d1 and the moon of No. two diode d2
Pole, the negative electrode of a diode d1 connects the positive pole+5v of 5v power supply, and the anode of No. two diode d2 connects 5v power supply
Negative pole -5v, the anode of a diode d1 as the signal output part of voltage clamp circuit 5,
Zero-crossing comparator 6 includes the power supply ground of 5v power supply, operational amplifier u2, resistance r6 and 5v power supply,
The positive signal input part of the signal output part concatenation operation amplifier u2 of voltage clamp circuit 5, operational amplifier
The positive power source terminal of u2 is simultaneously connected with 5v power supply and one end of resistance r6, and the negative power end of operational amplifier u2 connects 5v and powers
The power supply ground of power supply, the outfan of operational amplifier u2 connects the other end of resistance r6, and the negative signal of operational amplifier u2 is defeated
Enter end as the signal input part of zero-crossing comparator 6, one end of resistance r6 as a signal output part of zero-crossing comparator 6,
The other end of resistance r6 as another signal output part of zero-crossing comparator 6,
Zero potential trimming circuit 4 includes adjustable resistance r12, resistance r11, No. three diode d3,5v power supplies and 5v
The power supply ground of power supply,
The signal input part of zero-crossing comparator 6 connects the adjustable end of adjustable resistance r12, and one end of adjustable resistance r12 is simultaneously
Connect one end of resistance r11 and the anode of No. three diode d3, the other end of resistance r11 connects 5v power supply, adjustable resistance
The other end of r12 is simultaneously connected with the negative electrode of No. three diode d3 and the power supply ground of 5v power supply,
Photoelectric isolating circuit 7 include resistance r7, the photoisolator u3 of model 6n137, electric capacity c1,5v power supply,
The power supply ground of 5v power supply, the power supply ground of 3.3v power supply, 3.3v power supply and resistance r9,
One signal output part of zero-crossing comparator 6 connects one end of resistance r7, and the other end of resistance r7 connects model
No. 2 pins of the photoisolator u3 of 6n137, No. 5 pins of the photoisolator u3 of model 6n137 connect 3.3v and power electricity
The power supply ground in source, No. 7 pins of the photoisolator u3 of model 6n137 are simultaneously connected with the photoisolator of model 6n137
No. 8 pins of u3, one end of electric capacity c1 and 5v power supply, the other end of electric capacity c1 connects the power supply ground of 5v power supply, type
No. 6 pins of the photoisolator u3 number for 6n137 connect one end of resistance r9, and the other end of resistance r9 connects 3.3v and powers electricity
Source, another signal output part of zero-crossing comparator 6 connects No. 3 pins of the photoisolator u3 of model 6n137, model
No. 6 pins of the photoisolator u3 of 6n137 as the signal output part of photoelectric isolating circuit 7,
The signal output part of photoelectric isolating circuit 7 connects the signal input part of digital signal processor dsp8.
In present embodiment, the signal output part of digital signal processor dsp8 captures opening of photoelectric isolating circuit output
The hopping edge of OFF signal produces capture and interrupts, and dsp is changed according to good order prepared in advance according to the crossover point signal of capture
To driving brshless DC motor rotates.
Specific embodiment two: present embodiment is to the brushless direct-current machine counter electromotive described in specific embodiment one
Triple-frequency harmonics testing circuit is described further, and in present embodiment, digital signal processor dsp8 adopts model
Tms320f2812 realizes.
Specific embodiment three: present embodiment is to the brushless direct-current machine counter electromotive described in specific embodiment one
Triple-frequency harmonics testing circuit is described further, and in present embodiment, operational amplifier u2 adopts model lm339 to realize.
Operation principle: in the external equivalent star-like connection resistance of the three-phase lead-in wire terminal of brshless DC motor, and to unidirectional current
Electric potential difference at the m of source midpoint and between external star resistor neutral o carries out divider filter, can get counter electromotive force three times humorous
Ripple signal.Through the voltage clamp circuit of -5v and 5v composition, input to the zero-crossing comparator being made up of operational amplifier lm339
Positive input, the zero cross signal of harmonic signal is detected, the reverse input end of operational amplifier lm339 compares
The input of current potential, connection be zero potential trimming circuit, outfan export corresponding 0v and 5v switching signal.Warp again
Cross the interference at photoisolator 6n137 isolation input end, to dsp, dsp captures switch to be believed the switching signal of output 0v and 3.3v
Number hopping edge produce capture interrupt, dsp according to capture crossover point signal commutated according to good order prepared in advance, drive
Galvanic electricity machine rotates.
Claims (3)
1. brushless direct-current machine counter electromotive triple-frequency harmonics testing circuit it is characterised in that it include brshless DC motor (u1),
Star-like resistance (1), motor DC power supply mid-point voltage (2), low pass filter (3), zero potential trimming circuit (4), electricity
Pressure clamp circuit (5), zero-crossing comparator (6), photoelectric isolating circuit (7) and digital signal processor dsp (8),
Described star-like resistance (1) includes resistance r3, resistance r4 and resistance r5,
The three-phase end of incoming cables of described brshless DC motor (u1) connects one end of resistance r3, one end of resistance r4 and resistance r5 respectively
One end, the other end of resistance r3 connects the other end of resistance r5 and the other end of resistance r4 is defeated as star-like resistance (1)
Go out end；
Low pass filter (3) includes resistance r8, resistance r10 and electric capacity c2,
The outfan of star-like resistance (1) connects one end of resistance r8, the other end of resistance r8 be simultaneously connected with resistance r10 one end and
One end of electric capacity c2, the other end of resistance r10 connects the other end of electric capacity c2, the other end of resistance r8, one end of resistance r10 and
The signal output part all as low pass filter (3) for the one end of electric capacity c2, the other end of resistance r10 is as low pass filter (3)
Signal input part；
Motor DC power supply mid-point voltage (2) includes the power supply ground of power supply, resistance r1, resistance r2 and power supply,
The signal input part of low pass filter (3) is simultaneously connected with one end of resistance r1 and one end of resistance r2, and resistance r1's is another
End connects power supply, and the other end of resistance r2 connects the power supply ground of power supply,
Voltage clamp circuit (5) includes the positive pole+5v of 5v power supply, diode d1, No. two diode d2 and 5v power
Negative pole-the 5v of power supply,
The signal output part of low pass filter (3) is simultaneously connected with the anode of a diode d1 and the negative electrode of No. two diode d2,
The negative electrode of a number diode d1 connects the positive pole+5v of 5v power supply, and the anode of No. two diode d2 connects 5v power supply
The anode of negative pole -5v, a diode d1 as the signal output part of voltage clamp circuit (5),
Zero-crossing comparator (6) includes the power supply ground of 5v power supply, operational amplifier (u2), resistance r6 and 5v power supply,
The positive signal input part of signal output part concatenation operation amplifier (u2) of voltage clamp circuit (5), operational amplifier
(u2) positive power source terminal is simultaneously connected with 5v power supply and one end of resistance r6, and the negative power end of operational amplifier (u2) connects 5v
The power supply ground of power supply, the outfan of operational amplifier (u2) connects the other end of resistance r6, operational amplifier (u2) negative
As the signal input part of zero-crossing comparator (6), one end of resistance r6 is as one of zero-crossing comparator (6) for phase signals input
Signal output part, the other end of resistance r6 as another signal output part of zero-crossing comparator (6),
Zero potential trimming circuit (4) includes adjustable resistance r12, resistance r11, No. three diode d3,5v power supplies and 5v and supplies
The power supply ground of power supply,
The signal input part of zero-crossing comparator (6) connects the adjustable end of adjustable resistance r12, and one end of adjustable resistance r12 connects simultaneously
One end of connecting resistance r11 and the anode of No. three diode d3, the other end of resistance r11 connects 5v power supply, adjustable resistance r12
The other end be simultaneously connected with the power supply ground of the negative electrode of No. three diode d3 and 5v power supply,
Photoelectric isolating circuit (7) include resistance r7, the photoisolator (u3) of model 6n137, electric capacity c1,5v power supply,
The power supply ground of 5v power supply, the power supply ground of 3.3v power supply, 3.3v power supply and resistance r9,
One signal output part of zero-crossing comparator (6) connects one end of resistance r7, and the other end of resistance r7 connects model
No. 2 pins of the photoisolator (u3) of 6n137, No. 5 pins of the photoisolator (u3) of model 6n137 connect 3.3v and supply
The power supply ground of power supply, No. 7 pins of the photoisolator (u3) of model 6n137 are simultaneously connected with the photoelectricity of model 6n137
No. 8 pins of isolator (u3), one end of electric capacity c1 and 5v power supply, the other end of electric capacity c1 connects the electricity of 5v power supply
Source ground, No. 6 pins of the photoisolator (u3) of model 6n137 connect one end of resistance r9, and the other end of resistance r9 connects
3.3v power supply, another signal output part of zero-crossing comparator (6) connects the photoisolator (u3) of model 6n137
No. 3 pins, No. 6 pins of the photoisolator (u3) of model 6n137 as the signal output part of photoelectric isolating circuit (7),
The signal output part of photoelectric isolating circuit (7) connects the signal input part of digital signal processor dsp (8).
2. brushless direct-current machine counter electromotive triple-frequency harmonics testing circuit according to claim 1 is it is characterised in that numeral
Signal processor dsp (8) adopts model tms320f2812 to realize.
3. brushless direct-current machine counter electromotive triple-frequency harmonics testing circuit according to claim 1 is it is characterised in that computing
Amplifier (u2) adopts model lm339 to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410641063.5A CN104330628B (en) | 2014-11-12 | 2014-11-12 | Brushless direct current motor counter electromotive force third harmonic detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410641063.5A CN104330628B (en) | 2014-11-12 | 2014-11-12 | Brushless direct current motor counter electromotive force third harmonic detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104330628A CN104330628A (en) | 2015-02-04 |
| CN104330628B true CN104330628B (en) | 2017-02-01 |
Family
ID=52405391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410641063.5A Active CN104330628B (en) | 2014-11-12 | 2014-11-12 | Brushless direct current motor counter electromotive force third harmonic detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104330628B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490794A (en) * | 2018-10-18 | 2019-03-19 | 湖南恩智测控技术有限公司 | A kind of power supply ripple test circuit and test method |
| CN110829907B (en) * | 2019-10-29 | 2021-03-02 | 河海大学 | Neutral point-based electro-magnetic doubly salient motor position-sensorless commutation method |
| CN112468029B (en) * | 2020-12-08 | 2021-09-28 | 哈尔滨工业大学 | Control method for five-phase permanent magnet synchronous motor without position sensor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6590794B1 (en) * | 1999-10-15 | 2003-07-08 | Siemens Aktiengesellschaft | Apparatus and method for measuring current |
| CN102904508A (en) * | 2012-10-16 | 2013-01-30 | 上海大学 | Rotor position detection method based on line-to-line back electromotive force for brushless direct current motor |
| CN103018541A (en) * | 2012-11-06 | 2013-04-03 | 中南林业科技大学 | Counter-potential zero-crossing detection circuit and counter-potential zero-crossing detection method for brushless direct-current motor |
| CN103278686A (en) * | 2013-05-10 | 2013-09-04 | 国家电网公司 | Harmonic analysis filtering system and intelligently selected harmonic detection method |
| CN103715953A (en) * | 2013-12-30 | 2014-04-09 | 南京理工大学 | Brushless direct current motor rotor position detecting device and phase changing method |
| CN204154811U (en) * | 2014-11-12 | 2015-02-11 | 黑龙江省科学院科技孵化中心 | Brushless direct-current machine counter electromotive third harmonic testing circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58198165A (en) * | 1982-05-12 | 1983-11-18 | Hitachi Ltd | Detecting method for current of pwm converter |
-
2014
- 2014-11-12 CN CN201410641063.5A patent/CN104330628B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6590794B1 (en) * | 1999-10-15 | 2003-07-08 | Siemens Aktiengesellschaft | Apparatus and method for measuring current |
| CN102904508A (en) * | 2012-10-16 | 2013-01-30 | 上海大学 | Rotor position detection method based on line-to-line back electromotive force for brushless direct current motor |
| CN103018541A (en) * | 2012-11-06 | 2013-04-03 | 中南林业科技大学 | Counter-potential zero-crossing detection circuit and counter-potential zero-crossing detection method for brushless direct-current motor |
| CN103278686A (en) * | 2013-05-10 | 2013-09-04 | 国家电网公司 | Harmonic analysis filtering system and intelligently selected harmonic detection method |
| CN103715953A (en) * | 2013-12-30 | 2014-04-09 | 南京理工大学 | Brushless direct current motor rotor position detecting device and phase changing method |
| CN204154811U (en) * | 2014-11-12 | 2015-02-11 | 黑龙江省科学院科技孵化中心 | Brushless direct-current machine counter electromotive third harmonic testing circuit |
Non-Patent Citations (2)
| Title |
|---|
| 一种无位置传感器BLDC零启动的纯硬件实现方法;林潇等;《浙江大学学报( 工学版)》;20080930;第42卷(第9期);1591-1596 * |
| 无刷直流电机无位置传感器控制***仿真新方法;温嘉斌等;《黑龙江大学自然科学学报》;20131031;第30卷(第5期);696-700 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104330628A (en) | 2015-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101599732B (en) | Control method of brushless DC motor (BLDC) position signal phase error based on back EMF zero crossing point reconstruction | |
| CN206564553U (en) | Brushless DC motor control system based on current hysteresis-band control | |
| CN105158592B (en) | Three phase network impedance real-time detection method under power network asymmetrical | |
| CN104330628B (en) | Brushless direct current motor counter electromotive force third harmonic detection circuit | |
| CN103560725A (en) | Brushless direct-current motor position detection method independent of rotating speed | |
| CN104330583A (en) | Aircraft engine rotating speed signal acquisition circuit | |
| CN202837520U (en) | Power-off detection circuit for alternating-current power source and direct-current variable-frequency air conditioner | |
| CN109239635B (en) | Permanent magnet synchronous motor rotary transformer zero calibration system and calibration method | |
| CN103633904A (en) | Control method and control system for sensorless brushless direct-current motor | |
| CN104320034A (en) | Permanent magnet brushless direct current motor low-speed and zero-speed rotor position observing method | |
| CN202383199U (en) | Phase sequence and zero cross detection circuit structure | |
| CN104065324B (en) | Three phase alternating current motor power driving controller based on preposing conversion device cascade three-level inverter | |
| CN203519703U (en) | DC busbar voltage sampling circuit | |
| CN104167971B (en) | A kind of electric excitation synchronous motor initial position of rotor detection means and detection method | |
| CN104283482A (en) | Low-speed and zero-speed rotor position observing system for permanent magnet brushless direct current motor | |
| CN207427014U (en) | A kind of integral control circuit of brshless DC motor | |
| CN204154811U (en) | Brushless direct-current machine counter electromotive third harmonic testing circuit | |
| CN203219231U (en) | Back electromotive force zero cross detection circuit of brushless direct current motor | |
| CN204633728U (en) | Apparatus for detecting weak signal | |
| CN203377584U (en) | Three-phase non-midline phase-lack, undervoltage and overvoltage protection circuit | |
| CN101777756B (en) | Over-current protection circuit for insulated gate bipolar transistor | |
| CN204681284U (en) | A kind of two-phase motor frequency-changing control system based on DSP | |
| CN204103815U (en) | A kind of electric excitation synchronous motor initial position of rotor checkout gear | |
| CN105846471A (en) | Pulse width modulation feedback control power grid | |
| CN107276459A (en) | A kind of three-phase permanent magnet synchronous motor sensorless drive circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190815 Address after: 150027 Heilongjiang city of Harbin province Songbei pine village nursery building first Tun Town of Songhua River Patentee after: Heilongjiang Energy Environment Institute Address before: 150090, B, building 8, building 7, No. 15, Songshan Road, Nangang District, Harbin, Heilongjiang Patentee before: Technical Hatcher Center, Heilongjiang Academy of Sciences |
|
| TR01 | Transfer of patent right |