CN205142075U - SPWM variable frequency speed governing(VFSG) range hood - Google Patents
SPWM variable frequency speed governing(VFSG) range hood Download PDFInfo
- Publication number
- CN205142075U CN205142075U CN201521006859.XU CN201521006859U CN205142075U CN 205142075 U CN205142075 U CN 205142075U CN 201521006859 U CN201521006859 U CN 201521006859U CN 205142075 U CN205142075 U CN 205142075U
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- Prior art keywords
- circuit
- spwm
- wind speed
- range hood
- asynchronous motor
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Abstract
The utility model discloses a SPWM variable frequency speed governing(VFSG) range hood, including the single -phase asynchronous motor, power filter circuit, switching power supply circuit, master control circuit, wind speed settlement unit, unit connection master control circuit is set for to the wind speed, power filter circuit linked switch power supply circuit still includes inverter circuit, frequency conversion driver chip control circuit, power filter circuit, output connection single -phase asynchronous motor are connected to inverter circuit's input, the unit was set for to the wind speed wind speed control signal sends to inverter circuit's control end through master control circuit, frequency conversion driver chip control circuit, but by inverter circuit with the DC voltage of power filter circuit output, give the single -phase asynchronous motor through the alternating current of SPWM modulation mode output variable ratio frequency changer pressure regulating. The utility model discloses can realize poleless speed adjusting, speed slew range is wideer, and the low -speed operation is quieter.
Description
Technical field
The utility model relates to range hood technical field, more particularly, relates to a kind of SPWM frequency control range hood.
Background technology
The motor speed control device of the smoke exhaust ventilator now commercially used generally adopts tapped speed regulation method, depend on the control that tap change interior flux reaches speed, this mode of speed regulation is step speed regulation, can not realize the adjustment of any revolution, general gear only has 2-4 shelves, and controlled speed is little.And the switching between different revolution also by causing beating of motor moment, affects the useful life of motor.
Lampblack absorber in the market applies sinusoidal wave 220 volts, 50 cycle power sources mostly, various power-equipment, and long distance power transmission also all needs sinusoidal wave alternating current.What more solar energy photovoltaic generator exported is sine wave alternating current, generates sine wave at present and still adopts the full-bridge circuit introduced above, just adopts PWM pulse-width modulation or the mode such as phase shifting control or frequency modulation control to the control of switching transistor.If pulse train is changed into the constant amplitude of equal number and not wide rectangular pulse, pulse center invariant position, and make this rectangular pulse area identical with corresponding rectangular pulse, what obtain is exactly that the width of pulse is by sinusoidal rule change with the SPWM waveform of sine wave equivalence.And at present, market does not also adopt the frequency control range hood of SPWM frequency modulation.
Utility model content
The technical problems to be solved in the utility model is: the SPWM frequency control range hood providing a kind of structure simple, stable, realizes the stepless speed regulation of range hood, to overcome the deficiencies in the prior art.
The utility model solves the technical scheme that its technical problem adopts: a kind of SPWM frequency control range hood, comprise single-phase asynchronous motor, electric source filter circuit, switching power circuit, governor circuit, wind speed setup unit, described wind speed setup unit connects governor circuit, described electric source filter circuit connecting valve power circuit, also comprise inverter circuit, frequency conversion drive chip control circuit, the input of described inverter circuit connects electric source filter circuit, output connects single-phase asynchronous motor, the blast velocity control signal of described wind speed setup unit is through governor circuit, frequency conversion drive chip control circuit is sent to the control end of inverter circuit, direct voltage electric source filter circuit exported by inverter circuit, the alternating current of variable ratio frequency changer pressure-adjustable is exported to single-phase asynchronous motor by SPWM modulation system.
Compared with prior art, the beneficial effects of the utility model are:
The rotating speed of single-phase asynchronous motor is:
n=60f(1-s)/p,
Wherein f is input current frequency, and p is the number of pole-pairs of rotating magnetic field;
Can know from formula above, change the frequency of input asynchronous machine electric current, then can change the rotating speed of single-phase asynchronous motor.Except changing the power frequency of input motor, also need according to frequency change input voltage, be that interior flux and rotor speed match, like this, motor could run at the efficient point of optimum.The application is converted by AC-DC-AC exactly in the mode of the variable frequency control of single-phase asynchronous motor, uses SPWM voltage modulated mode, inputs the voltage of a pressure-adjustable Frequency Adjustable, allow the motor speed of service be changed to motor.
Compared with prior art, the utility model is used for producing SPWM modulation signal by integrated circuit, microprocessor sends the parameter such as output frequency, voltage to it just can produce high accuracy control signal, exports intact sine wave, and this mode circuit is simple, effective, reliability is high.Thus enabling the utility model motor frequency conversion drive cigarette machine to realize stepless time adjustment, speed range of operation is wider, and electric motor starting and speed regulate more steady, and low cruise is quieter, and minimum speed can arrive 100rpm in theory.And make cigarette machine controller cost lower.
Accompanying drawing explanation
Fig. 1 is electric source filter circuit figure of the present utility model.
Fig. 2 is switching power circuit figure of the present utility model.
Fig. 3 is governor circuit figure of the present utility model.
Fig. 4 is inverter circuit figure of the present utility model.
Fig. 5 is frequency conversion drive chip control circuit figure of the present utility model.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
See Fig. 1-5, SPWM frequency control range hood of the present utility model, comprise single-phase asynchronous motor, electric source filter circuit 1, switching power circuit 2, governor circuit, wind speed setup unit, described wind speed setup unit connects governor circuit, described electric source filter circuit connecting valve power circuit, also comprise inverter circuit 3, frequency conversion drive chip control circuit 5, the input of described inverter circuit connects electric source filter circuit, output connects single-phase asynchronous motor, the blast velocity control signal of described wind speed setup unit is through governor circuit, frequency conversion drive chip control circuit is sent to the control end of inverter circuit, direct voltage electric source filter circuit exported by inverter circuit, the alternating current of variable ratio frequency changer pressure-adjustable is exported to single-phase asynchronous motor by SPWM modulation system.
Described governor circuit comprises LED display circuit, buzz circuit.
Described wind speed setup unit comprises slider bar, MCU, switch, and described switch receives the signal of slider bar and is switched to the wind-speed gear of response.Slider bar independent of switch, and has independently MCU, carries out single line communication with switch.Slider bar mainly through detecting key range rapidly and sensitively to realize sliding function, implementation and common touch key-press similar.Button is sensitiveer more fast, and antijamming capability is relatively more weak, in order to strengthen its antijamming capability, so slider bar is independent of switch.The signal that switch receives slider bar judges, when touching slider bar, switch display is corresponding, the switching response order when leaving slip treaty 0.5s (being switched to response gear).
Below openly specific embodiment of the utility model is only; do not form the restriction to the utility model protection range; for the utility model person of an ordinary skill in the technical field; do not departing under general idea prerequisite of the present utility model; according to technical solutions of the utility model do without the need to through the change of creative work and replacement, all should drop within protection range of the present utility model.
Claims (4)
1. a SPWM frequency control range hood, comprise single-phase asynchronous motor, electric source filter circuit, switching power circuit, governor circuit, wind speed setup unit, described wind speed setup unit connects governor circuit, described electric source filter circuit connecting valve power circuit, it is characterized in that: also comprise inverter circuit, frequency conversion drive chip control circuit, the input of described inverter circuit connects electric source filter circuit, output connects single-phase asynchronous motor, the blast velocity control signal of described wind speed setup unit is through governor circuit, frequency conversion drive chip control circuit is sent to the control end of inverter circuit, direct voltage electric source filter circuit exported by inverter circuit, the alternating current of variable ratio frequency changer pressure-adjustable is exported to single-phase asynchronous motor by SPWM modulation system.
2. SPWM frequency control range hood according to claim 1, is characterized in that: described governor circuit comprises LED display circuit.
3. SPWM frequency control range hood according to claim 1, is characterized in that: described governor circuit comprises buzz circuit.
4. the SPWM frequency control range hood according to claim 1 or 2 or 3, is characterized in that: described wind speed setup unit comprises slider bar, MCU, switch, and described switch receives the signal of slider bar and is switched to the wind-speed gear of response.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521006859.XU CN205142075U (en) | 2015-12-08 | 2015-12-08 | SPWM variable frequency speed governing(VFSG) range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521006859.XU CN205142075U (en) | 2015-12-08 | 2015-12-08 | SPWM variable frequency speed governing(VFSG) range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205142075U true CN205142075U (en) | 2016-04-06 |
Family
ID=55627827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521006859.XU Expired - Fee Related CN205142075U (en) | 2015-12-08 | 2015-12-08 | SPWM variable frequency speed governing(VFSG) range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205142075U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793079A (en) * | 2019-10-22 | 2020-02-14 | 广州七喜智能设备有限公司 | Intelligent controller for kitchen fan and control method thereof |
| CN112398414A (en) * | 2019-08-16 | 2021-02-23 | 泛仕达机电股份有限公司 | Two-phase stepless variable frequency speed regulation control circuit and method for household purifier |
-
2015
- 2015-12-08 CN CN201521006859.XU patent/CN205142075U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112398414A (en) * | 2019-08-16 | 2021-02-23 | 泛仕达机电股份有限公司 | Two-phase stepless variable frequency speed regulation control circuit and method for household purifier |
| CN112398414B (en) * | 2019-08-16 | 2024-06-04 | 泛仕达机电股份有限公司 | Two-phase stepless variable-frequency speed regulation control circuit and method for household purifier |
| CN110793079A (en) * | 2019-10-22 | 2020-02-14 | 广州七喜智能设备有限公司 | Intelligent controller for kitchen fan and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20171208 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |