CN106382662A - Range hood provided with position-sensorless brushless direct-current motor and control method thereof - Google Patents
Range hood provided with position-sensorless brushless direct-current motor and control method thereof Download PDFInfo
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- CN106382662A CN106382662A CN201610931597.0A CN201610931597A CN106382662A CN 106382662 A CN106382662 A CN 106382662A CN 201610931597 A CN201610931597 A CN 201610931597A CN 106382662 A CN106382662 A CN 106382662A
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- unit
- motor
- range hood
- ipm
- integrated chip
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
-
- 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
-
- 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
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
- H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings
Abstract
The invention provides a range hood provided with a position-sensorless brushless direct-current motor. The range hood provided with the position-sensorless brushless direct-current motor comprises a speed setting unit, a CPU microprocessor, a current sampling unit, a counter electromotive force zero-cross detecting unit and a power supply, wherein the speed setting unit, the CPU microprocessor, the current sampling unit and the counter electromotive force zero-cross detecting unit are connected, and the power supply supplies power to the speed setting unit, the CPU microprocessor and an IPM three-phase full-bridge intelligent power amplification unit. The range hood provided with the position-sensorless brushless direct-current motor further comprises the IPM three-phase full-bridge intelligent power amplification unit. The IPM three-phase full-bridge intelligent power amplification unit comprises a kernel unit, a temperature ultralimit monitoring unit and a three-phase invert unit. After conducting A/D conversion and operation on speed adjustment signals input by the speed setting unit, the CPU microprocessor outputs a PWM waveform at a corresponding duty ratio, and the waveform is amplified and isolated by the kernel unit and then drives the three-phase invert unit to amplify the power of the waveform and load the waveform to the motor. The range hood provided with the position-sensorless brushless direct-current motor has the beneficial effects of being simple and reasonable in structure, environmentally friendly and low in power consumption and saves energy.
Description
Technical field
The present invention relates to a kind of range hood of motor variable ratio frequency changer stepless speed regulation of brush DC position-sensor-free and its
Control method.
Background technology
At present, the range hood motor in industry is mostly single-phase asynchronous alternating current generator, and the feature of such motor is low energy
Effect, general efficiency is 40% about, and motor volume is relatively large, needs capacitor start, and gear is usually 2 or 3, and speed is adjusted
Scope is little, is assemblied in whole machine total pressure efficiency on range hood typically 23% about.And brushless position-sensor-free direct current
Machine, typically more than 80%, the whole machine total pressure efficiency being assemblied on range hood is higher than then 40% to its efficiency, and energy-saving effect is very
Substantially, especially speed-regulating range width, achievable variable-frequency stepless speed-regulating, speed adjusting performance is excellent.As Chinese Patent Application No. is
201210036642.8, a kind of rotation speed of fan self-adaptive regulating of invention entitled lampblack absorber and its control method, including
There are blower fan system and rotational speed control module, also include sensor, main control module, key-press module.Said structure makes lampblack absorber
Kitchen fume can be effectively improved with the electric machine operation state of intelligent selection blower fan system it is ensured that the using effect of lampblack absorber
Environment, accomplishes energy-conserving and environment-protective, but does not propose rotational speed control module specific embodiment, and the operation that can not meet user will
Ask.
Content of the invention
The technical problem to be solved is to overcome the deficiency of above-mentioned prior art, provides a kind of band brush DC
The range hood of motor without position sensor and its control method.
The main skill adopting according to a kind of range hood with brush DC motor without position sensor that the present invention provides
Art scheme is：Including the speed preset unit being connected, CPU microprocessor, current sampling unit, counter electromotive force zero passage detection list
Unit and the power supply to described speed preset unit, described CPU microprocessor offer power supply, also include IPM three phase full bridge
Intelligent power amplifying unit, described IPM three phase full bridge intelligent power amplifying unit includes kernel unit, temperature over-range monitoring unit
With three-phase inversion unit, the speed-regulating signal that described CPU microprocessor inputs to described speed preset unit carry out A/D conversion go forward side by side
After row operation, export the PWM pulse-width modulation waveform of corresponding dutycycle, this waveform amplifies through described kernel unit, isolate after driving
Described three-phase inversion cell power is loaded on motor after amplifying；
Described current sampling unit detects that the operating current of motor or described temperature over-range monitoring unit detect described IPM tri-
Feed back to described CPU microprocessor after the operating temperature of phase full-bridge intelligent power amplifying unit, if the current overload on motor or
Described IPM three phase full bridge intelligent power amplifying unit has overheating problem, and described CPU microprocessor sends instruction and closes described IPM
The output of three phase full bridge intelligent power amplifying unit.
The range hood with brush DC motor without position sensor that the present invention provides also can have attached technology as follows
Feature：
Described kernel unit includes diode D4-D6, integrated chip IC1-IC3 being connected, and described CPU microprocessor is defeated
The control signal of the PW0-PW5 going out is respectively through resistance R2 and R3, resistance R5 and R6, resistance R8 and R9 current limliting and described electric capacity C2
Filter after High-frequency Interference with C1, electric capacity C5 and C4, electric capacity C8 and C7, more respectively through described diode D4 and described integrated chip
Control after IC1, described diode D5 and described integrated chip IC2, described diode D6 and the amplification of described integrated chip IC3, isolation
Make the switch of described three-phase inversion unit.
Described three-phase inversion unit includes power tube VT1-VT6 and is connected in parallel on the diode at each described power tube two ends
D7-D12, described power tube VT1 and described power tube VT2 are connected in described integrated chip IC1, described power tube VT3 and institute
State power tube VT4 to be connected in described integrated chip IC2, described power tube VT5 and described power tube VT6 is connected to described integrated
In chip IC 3.
Described IPM three phase full bridge intelligent power amplifying unit also includes being connected with described integrated chip IC1-IC3 respectively
Electric capacity C3, C6 and C9, described electric capacity C3, C6 and C9 be respectively described integrated chip IC1-IC3 VCC end filter high frequency do
Disturb.
Described temperature over-range monitoring unit is the TEMP being built in described IPM three phase full bridge intelligent power amplifying unit
Device VTH, feeds back to after the operating temperature of the described temperature sensor VTH described IPM three phase full bridge intelligent power amplifying unit of detection
Described CPU microprocessor.
Described counter electromotive force zero passage detection unit includes resistance R10-R15, the electric capacity C13-C15 being connected, described anti-electricity
Kinetic potential zero passage detection unit detects that the counter electromotive force that machine winding produces in the running realizes commutation to obtain position signalling.
Described current sampling unit includes resistance R0 and is connected in parallel on operational amplifier A 1 on described resistance R0, described electricity
Stream sampling unit detects the operating current of motor, if the current overload on motor, described CPU microprocessor sends instruction and closes institute
State the output of IPM three phase full bridge intelligent power amplifying unit.
Described IPM three phase full bridge intelligent power amplifying unit also includes unit of booting, and described bootstrapping unit includes ensureing work(
The resistance R1 of rate pipe VT1 normal work, diode D1, electric capacity C12, VB, VS end of integrated chip IC1；Just ensure power tube VT3
The often resistance R4 of work, diode D2, electric capacity C11, VB, VS end of integrated chip IC2；Ensure power tube VT5 normal work
Resistance R7, diode D3, electric capacity C10, VB, VS end of integrated chip IC3.
According to the present invention provide a kind of above-mentioned range hood control method adopt main technical schemes be：Including with
Lower step：
Step S00, power-up initializing, System self-test resets；
Step S01, described speed preset unit transmits starting up speed set-point to described CPU processor, carries out numeral
Filtering operation is processed；
Step S02, the conversion of speed preset value is become pwm signal by described CPU processor；
Step S03, whether the value that described CPU processor distinguishing speed gives unit transportation changes, and changes, again counts
Calculate；If it is not, then motor is operated by described CPU processor；
Step S04, the speed preset value of change is rerun process by described CPU processor；
Step S05, described CPU processor by described back-emf zero cross detection circuit differentiate range hood air outlet be
No blocking；
Step S06, if the air outlet blocking of range hood, described CPU processor is by the value of speed preset unit transportation
It is switched to maximum；
Step S07, described step S04, the conversion of step S06 speed preset signal are become PWM letter by described CPU processor
Number；
Step S08, described IPM three phase full bridge intelligent power amplifying unit receives the pwm signal of CPU processor, by institute
State kernel unit and the operating of described three-phase inversion unit motor；
Step S09, described CPU processor collects current overload or described IPM three phase full bridge intelligent power on motor
Amplifying unit temperature over-range definite value or described speed preset unit have off signal, then close PWM output signal, close motor.
Using the present invention, the range hood with brush DC motor without position sensor providing and its control method are brought
Have the beneficial effect that：Simple and reasonable, environmental protection and energy saving, small power consumption, efficiency high, adjustable rotating speed, torque range are big, can achieve no
Level speed governing；It is applied on range hood, smooth running is reliable, noise is low, total pressure efficiency is high.
Brief description
Fig. 1 is the circuit block diagram of the range hood with brush DC motor without position sensor for the present invention.
Fig. 2 is the circuit diagram of the range hood with brush DC motor without position sensor for the present invention.
Fig. 3 is each phase winding energising logical schematic with brush DC motor without position sensor for the present invention.
Fig. 4 is the FB(flow block) of the control method of range hood of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail：
As shown in Figure 1 to Figure 3, a kind of fume-exhausting with brush DC motor without position sensor providing according to the present invention
The embodiment of machine, including the speed preset unit 1 being connected, CPU microprocessor 2, current sampling unit 6, counter electromotive force zero passage
Detector unit 4 and the power supply 5 to described speed preset unit 1, described CPU microprocessor 2 offer power supply, speed preset
Unit 1 is man-machine control panel, also includes IPM three phase full bridge intelligent power amplifying unit 3, described IPM three phase full bridge intelligence work(
Rate amplifying unit 3 includes kernel unit, temperature over-range monitoring unit and three-phase inversion unit, and CPU microprocessor 2 is to speed preset
The speed-regulating signal of unit 1 input carries out A/D conversion and goes forward side by side after row operation, exports the PWM pulse-width modulation waveform of corresponding dutycycle, should
Waveform amplifies through described kernel unit, isolate after drive described three-phase inversion cell power to be loaded on motor after amplifying；Its work
It is that the speed-regulating signal that CPU microprocessor 2 inputs to speed preset unit 1 carries out A/D conversion and goes forward side by side after row operation, defeated as principle
Go out the PWM pulse-width modulation waveform of corresponding dutycycle, this waveform drives three-phase inversion unit by this waveform after kernel unit amplification
It is loaded in brush DC motor without position sensor, motor operates；When speed-regulating signal changes, CPU microprocessor 2 is defeated
The dutycycle of the PWM pulse-width modulation waveform going out also changes therewith, exports the voltage duty cycle also respective change of motor, thus electric
The rotating speed of machine also and then changes, and reaches the purpose of variable-frequency stepless speed-regulating, and the range hood that the present invention provides adopts brush DC no
The motor of position sensor, this kind of motor has low cost, efficiency high, the high feature of reliability, the feature of suitable batch application.
Referring to Fig. 1 to Fig. 3, the range hood with brush DC motor without position sensor providing according to the present invention, institute
State current sampling unit 6 and detect that the operating current of motor or described temperature over-range monitoring unit detect described IPM three phase full bridge intelligence
Described CPU microprocessor 2 can be fed back to, if the current overload on motor or described IPM after the operating temperature of power amplification unit 3
Three phase full bridge intelligent power amplifying unit 3 has overheating problem, and it is complete that described CPU microprocessor 2 sends the instruction described IPM three-phase of closing
The output of bridge intelligent power amplifying unit 3；Its operation principle is that current sampling unit 6 detects the operating current feedback of motor
To CPU microprocessor 2, CPU microprocessor 2 judges whether short circuit or overload phenomenon according to this current signal, or temperature
The operating temperature that the monitoring unit that transfinites detects IPM three phase full bridge intelligent power amplifying unit 3 feeds back to CPU microprocessor 2,
CPU microprocessor 2 judges whether temperature over-range phenomenon according to this temperature signal, if having motor overcurrent or IPM three-phase
Full-bridge intelligent power amplifying unit 3 overheating problem, then send instruction and close the defeated of IPM three phase full bridge intelligent power amplifying unit 3
Go out, thus protecting motor and range hood itself without damage.
Referring to Fig. 1 to Fig. 3, the range hood with brush DC motor without position sensor providing according to the present invention, institute
State diode D4-D6, integrated chip IC1-IC3 that kernel unit includes being connected, wherein diode D4, integrated chip IC1 group
The amplification becoming U phase pwm pulse signal drives, and the amplification that diode D5, integrated chip IC2 form V phase pwm pulse signal drives,
The amplification that diode D6, integrated chip IC3 form W phase pulse signal drives, the PW0-PW5's of described CPU microprocessor 2 output
Control signal respectively through resistance R2 and R3, resistance R5 and R6, resistance R8 and R9 current limliting and described electric capacity C2 and C1, electric capacity C5 and
After C4, electric capacity C8 and C7 filter High-frequency Interference, more respectively through described diode D4 and described integrated chip IC1, described diode
Control described three-phase inversion after D5 and described integrated chip IC2, described diode D6 and the amplification of described integrated chip IC3, isolation
The switch of the power tube VT1-VT6 power tube of unit.
Referring to Fig. 1 to Fig. 3, the range hood with brush DC motor without position sensor providing according to the present invention, institute
State three-phase inversion unit to include power tube VT1-VT6 and be connected in parallel on the diode D7-D12 at each described power tube two ends, wherein
Power tube VT1, power tube VT2, diode D7, diode D8 composition U phase power amplification drive, power tube VT3, power tube VT4,
Diode D9, diode D10 composition V phase power amplification drives, power tube VT5, power tube VT6, diode D11, diode D12
Composition W phase power amplification drives.Described power tube VT1 and described power tube VT2 is connected in described integrated chip IC1, described
Power tube VT3 and described power tube VT4 is connected in described integrated chip IC2, described power tube VT5 and described power tube VT6
Be connected in described integrated chip IC3, three-phase inversion unit by the power of power supply 5+VDC as shown in Figure 3 the conducting of each phase winding when
Sequence (PW0-PW5 control signal) distributes to each phase winding on motor stator, so that motor produces continual torque.
As shown in figure 3, X-axis：ω is angular speed (angular frequency) for the time dependent speed of phase angle, and t is the time；Y-axis：u
For phase voltage., the present invention uses three-phase direct-current brushless motor without position sensor, and its threephase stator winding adopts Y type even
Connect, inverter circuit is step mode two-by-two, the energising logical schematic of each phase winding is as illustrated, order is：U+W-→U+V-
→ W+V- → W+U- → V+U- → V+W- → U+W-, moves in circles.Rotating mmf can be formed after energising, magnetomotive at this
Under effect, rotor also can rotate with.By the cycle and high level lasting time of control pwm signal come controlled motor armature electricity
Pressure, thus reach the purpose of speed governing.
Referring to Fig. 1 to Fig. 3, the range hood with brush DC motor without position sensor providing according to the present invention, institute
State the electric capacity C3 that IPM three phase full bridge intelligent power amplifying unit 3 also includes being connected with described integrated chip IC1-IC3 respectively,
C6 and C9, the VCC end that described electric capacity C3, C6 and C9 are respectively described integrated chip IC1-IC3 filters High-frequency Interference.
Referring to Fig. 1 to Fig. 3, the range hood with brush DC motor without position sensor providing according to the present invention, institute
Stating temperature over-range monitoring unit is the temperature sensor VTH being built in described IPM three phase full bridge intelligent power amplifying unit 3, institute
Described CPU is fed back to after the operating temperature stating the temperature sensor VTH described IPM three phase full bridge intelligent power amplifying unit 3 of detection
Microprocessor 2, if IPM three phase full bridge intelligent power amplifying unit 3 operating temperature transfinites, 11 Port detectings of CPU microprocessor 2
To operating temperature exceed setting value when, then close PWM0-PWM5 control signal output, thus close IPM three phase full bridge intelligence
Power amplification unit 3, motor shuts down, and reaches the purpose of protection IPM three phase full bridge intelligent power amplifying unit 3.
Referring to Fig. 1 to Fig. 3, the range hood with brush DC motor without position sensor providing according to the present invention, institute
State resistance R10-R15, the electric capacity C13-C15 that counter electromotive force zero passage detection unit 4 includes being connected, described counter electromotive force zero passage inspection
Survey unit 4 detects that the counter electromotive force that machine winding produces in the running realizes commutation to obtain position signalling.
Referring to Fig. 1 to Fig. 3, the range hood with brush DC motor without position sensor providing according to the present invention, institute
State current sampling unit 6 to include resistance R0 and be connected in parallel on operational amplifier A 1 on described resistance R0, described current sample list
The operating current of unit 6 detection motor, if the current overload on motor, described CPU microprocessor 2 sends instruction and closes described IPM
The output of three phase full bridge intelligent power amplifying unit 3, when motor load changes, the electric current flowing through sampling resistor R0 also becomes therewith
Change, then the output voltage of operational amplifier A 1 follows change, the 10th port of CPU microprocessor 2 is passed through to detect this voltage, if super
Cross the setting value of shutdown, then shut down.
Referring to Fig. 1 to Fig. 3, the range hood with brush DC motor without position sensor providing according to the present invention, institute
State IPM three phase full bridge intelligent power amplifying unit 3 and also include unit of booting, described bootstrapping unit includes just ensureing power tube VT1
The often resistance R1 of work, diode D1, electric capacity C12, VB, VS end of integrated chip IC1；Ensure power tube VT3 normal work
Resistance R4, diode D2, electric capacity C11, VB, VS end of integrated chip IC2；Ensure power tube VT5 normal work resistance R7, two
Pole pipe D3, electric capacity C10, VB, VS end of integrated chip IC3.
As shown in figure 4, the above-mentioned range hood with brush DC motor without position sensor providing according to the present invention
The embodiment of control method, comprises the following steps：
Step S00, power-up initializing, System self-test resets；
Step S01, described speed preset unit 1 transmits starting up speed set-point to described CPU processor, carries out numeral
Filtering operation is processed；
Step S02, the conversion of speed preset value is become pwm signal by described CPU processor；
Step S03, whether the value that described CPU processor distinguishing speed gives unit 1 conveying changes, and changes, again counts
Calculate；If it is not, then motor is operated by described CPU processor；
Step S04, the speed preset value of change is rerun process by described CPU processor；
Step S05, described CPU processor by described back-emf zero cross detection circuit differentiate range hood air outlet be
No blocking；
Step S06, if the air outlet blocking of range hood, the value that speed preset unit 1 is conveyed by described CPU processor
It is switched to maximum；
Step S07, described step S04, the conversion of step S06 speed preset signal are become PWM letter by described CPU processor
Number；
Step S08, described IPM three phase full bridge intelligent power amplifying unit 3 receives the pwm signal of CPU processor, by institute
State kernel unit and the operating of described three-phase inversion unit motor；
Step S09, described CPU processor collects current overload or described IPM three phase full bridge intelligent power on motor
Amplifying unit 3 temperature over-range definite value or described speed preset unit 1 have off signal, then close PWM output signal, close electricity
Machine.
Embodiment described above, simply one kind of the present invention more preferably specific embodiment, those skilled in the art
The usual variations and alternatives that member is carried out in the range of technical solution of the present invention all should comprise within the scope of the present invention.
Claims (9)
1. a kind of range hood with brush DC motor without position sensor, micro- including the speed preset unit being connected, CPU
Processor, current sampling unit, counter electromotive force zero passage detection unit and to described speed preset unit, described CPU microprocessor
Device provide power supply power supply it is characterised in that：Also include IPM three phase full bridge intelligent power amplifying unit, described IPM three-phase
Full-bridge intelligent power amplifying unit includes kernel unit, temperature over-range monitoring unit and three-phase inversion unit, described CPU microprocessor
The speed-regulating signal that device inputs to described speed preset unit carries out A/D conversion and goes forward side by side after row operation, exports the PWM of corresponding dutycycle
Pulse-width modulation waveform, this waveform amplifies through described kernel unit, isolate after drive described three-phase inversion cell power to amplify after plus
It is downloaded on motor；
Described current sampling unit detects that the operating current of motor or described temperature over-range monitoring unit detect that described IPM three-phase is complete
Described CPU microprocessor is fed back to, if the current overload on motor or described after the operating temperature of bridge intelligent power amplifying unit
IPM three phase full bridge intelligent power amplifying unit has overheating problem, and described CPU microprocessor sends instruction and closes described IPM three-phase
The output of full-bridge intelligent power amplifying unit.
2. the range hood with brush DC motor without position sensor according to claim 1 it is characterised in that：Described
Kernel unit includes diode D4-D6, integrated chip IC1-IC3 being connected, the PW0-PW5 of described CPU microprocessor output
Control signal respectively through resistance R2 and R3, resistance R5 and R6, resistance R8 and R9 current limliting and described electric capacity C2 and C1, electric capacity C5
Filter after High-frequency Interference with C4, electric capacity C8 and C7, more respectively through described diode D4 and described integrated chip IC1, described two poles
Control described three contraries after pipe D5 and described integrated chip IC2, described diode D6 and the amplification of described integrated chip IC3, isolation
Become the switch of unit.
3. the range hood with brush DC motor without position sensor according to claim 2 it is characterised in that：Described
Three-phase inversion unit includes power tube VT1-VT6 and is connected in parallel on the diode D7-D12 at each described power tube two ends, described work(
Rate pipe VT1 and described power tube VT2 is connected in described integrated chip IC1, and described power tube VT3 and described power tube VT4 is even
It is connected in described integrated chip IC2, described power tube VT5 and described power tube VT6 are connected in described integrated chip IC3.
4. the range hood with brush DC motor without position sensor according to claim 2 it is characterised in that：Described
IPM three phase full bridge intelligent power amplifying unit also include electric capacity C3, the C6 being connected with described integrated chip IC1-IC3 respectively and
C9, the VCC end that described electric capacity C3, C6 and C9 are respectively described integrated chip IC1-IC3 filters High-frequency Interference.
5. the range hood with brush DC motor without position sensor according to claim 1 it is characterised in that：Described
Temperature over-range monitoring unit is the temperature sensor VTH being built in described IPM three phase full bridge intelligent power amplifying unit, described temperature
Described CPU microprocessor is fed back to after the operating temperature of the degree sensor VTH described IPM three phase full bridge intelligent power amplifying unit of detection
Device.
6. the range hood with brush DC motor without position sensor according to claim 1 it is characterised in that：Described
Counter electromotive force zero passage detection unit includes resistance R10-R15, the electric capacity C13-C15 being connected, described counter electromotive force zero passage detection
Unit detects that the counter electromotive force that machine winding produces in the running realizes commutation to obtain position signalling.
7. the range hood with brush DC motor without position sensor according to claim 1 it is characterised in that：Described
Current sampling unit includes resistance R0 and is connected in parallel on operational amplifier A 1 on described resistance R0, described current sampling unit inspection
The operating current of measured motor, if the current overload on motor, it is complete that described CPU microprocessor sends the instruction described IPM three-phase of closing
The output of bridge intelligent power amplifying unit.
8. the range hood with brush DC motor without position sensor according to claim 3 it is characterised in that：Described
IPM three phase full bridge intelligent power amplifying unit also includes unit of booting, and described bootstrapping unit includes ensureing the normal work of power tube VT1
The resistance R1 of work, diode D1, electric capacity C12, VB, VS end of integrated chip IC1；Ensure the resistance of power tube VT3 normal work
R4, diode D2, electric capacity C11, VB, VS end of integrated chip IC2；Ensure resistance R7, the diode of power tube VT5 normal work
D3, electric capacity C10, VB, VS end of integrated chip IC3.
9. the control method of range hood as described in a kind of any one as claim 1-8 is it is characterised in that comprise the following steps：
Step S00, power-up initializing, System self-test resets；
Step S01, described speed preset unit transmits starting up speed set-point to described CPU processor, carries out digital filtering
Calculation process；
Step S02, the conversion of speed preset value is become pwm signal by described CPU processor；
Step S03, whether the value that described CPU processor distinguishing speed gives unit transportation changes, and changes, recalculates；If
No, then motor is operated by described CPU processor；
Step S04, the speed preset value of change is rerun process by described CPU processor；
Step S05, described CPU processor passes through described back-emf zero cross detection circuit and differentiates whether the air outlet of range hood is subject to
Stifled；
Step S06, if the air outlet blocking of range hood, the value of speed preset unit transportation is switched by described CPU processor
To maximum；
Step S07, described step S04, the conversion of step S06 speed preset signal are become pwm signal by described CPU processor；
Step S08, described IPM three phase full bridge intelligent power amplifying unit receives the pwm signal of CPU processor, by described interior
Nuclear unit and the operating of described three-phase inversion unit motor；
Step S09, described CPU processor collects current overload or the amplification of described IPM three phase full bridge intelligent power on motor
Cell temperature transfinites definite value or described speed preset unit has off signal, then close PWM output signal, closes motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610931597.0A CN106382662A (en) | 2016-10-31 | 2016-10-31 | Range hood provided with position-sensorless brushless direct-current motor and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610931597.0A CN106382662A (en) | 2016-10-31 | 2016-10-31 | Range hood provided with position-sensorless brushless direct-current motor and control method thereof |
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| CN106382662A true CN106382662A (en) | 2017-02-08 |
Family
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| CN201610931597.0A Pending CN106382662A (en) | 2016-10-31 | 2016-10-31 | Range hood provided with position-sensorless brushless direct-current motor and control method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106997185A (en) * | 2017-05-25 | 2017-08-01 | 天津吉麦克环保科技有限公司 | A kind of intelligent cooking fume control equipment control cabinet |
| CN108287287A (en) * | 2018-01-16 | 2018-07-17 | 惠州拓邦电气技术有限公司 | A kind of the metal-oxide-semiconductor self-checking circuit and method of three-phase direct-current brushless motor |
| CN113131827A (en) * | 2021-04-26 | 2021-07-16 | 深圳市腾云芯片技术有限公司 | Control method and device for AC motor speed regulation and electrical equipment |
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| CN108287287B (en) * | 2018-01-16 | 2021-06-04 | 惠州拓邦电气技术有限公司 | MOS (metal oxide semiconductor) tube self-checking circuit and method of three-phase DC brushless motor |
| CN113131827A (en) * | 2021-04-26 | 2021-07-16 | 深圳市腾云芯片技术有限公司 | Control method and device for AC motor speed regulation and electrical equipment |
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