CN202424618U - Frequency converter and range hood - Google Patents
Frequency converter and range hood Download PDFInfo
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- CN202424618U CN202424618U CN2011205352780U CN201120535278U CN202424618U CN 202424618 U CN202424618 U CN 202424618U CN 2011205352780 U CN2011205352780 U CN 2011205352780U CN 201120535278 U CN201120535278 U CN 201120535278U CN 202424618 U CN202424618 U CN 202424618U
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- inverter circuit
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- microprocessor
- frequency converter
- alternating current
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Abstract
The utility model discloses a frequency converter, which comprises a rectifier circuit, an inverter circuit and a microprocessor. The rectifier circuit is connected with a voltage input end and used for converting alternating current inputted by the voltage input end into direct current, the inverter circuit is connected with the rectifier circuit and used for transmitting the direct current into three-phase alternating current and transmitting the three-phase alternating current to a three-phase motor, and the microprocessor is connected with the inverter circuit and used for converting acquired speed signals into pulse width modulation signals to control the inverter circuit. The three-phase alternating current can be transmitted to the three-phase motor, the voltage of the three-phase alternating current can be adjusted, and the frequency of the three-phase alternating current can be changed, so that the microprocessor can convert the acquired speed signals into the pulse width modulation signals, the voltage of the three-phase alternating current is controlled through the pulse width modulation signals, the rotation speed of the three-phase motor is controlled through the speed signals acquired by the microprocessor, and the speed can be continuously adjusted. Moreover, different speeds are realized by applying different voltage, so that the different voltage consumes different power, and electric energy is saved.
Description
Technical field
The utility model relates to the converter technique field, in particular, relates to frequency converter and smoke exhaust ventilator.
Background technology
At present, household smoke exhaust ventilator generally adopts the single phase alternating current (A.C.) asynchronous machine, generally adopts the stepping speed governing, third gear normally, and speed adjustable range is limited.The concrete mode of speed regulation that realizes has following several kinds of modes of speed regulation usually: tap speed governing, electronic speed regulation and reactor speed governing.
Wherein, the tap speed governing is to change motor speed through the operation winding that changes motor, realizes the speed governing purpose.Electronic speed regulation is to utilize controllable silicon adjustment conductance for alternating current current flow angle to come regulation voltage, realizes the speed governing purpose.The reactor speed governing is through reducing the motor input voltage, realizing the speed governing purpose.
In research and practice process to prior art, the inventor of the utility model finds that there is following problem in prior art:
Whether above-mentioned several kinds of speed regulating methods are no matter change speed, and the power of its consumption all is the same, and promptly it doesn't matter with the electric energy that is consumed for the height of rotating speed, so waste energy; And speed can only have 3 kinds of mapping modes, can not realize the continuous adjusting of speed, can't satisfy the demand that the user changes speed in light of the circumstances.
Therefore, how to realize the continuous adjusting of smoke exhaust ventilator speed, and energy savings, the problem that needs most solution at present become.
The utility model content
In view of this, the purpose of design of the utility model is, a kind of frequency converter and have the smoke exhaust ventilator of this frequency convertor, and with the continuous adjusting of the fan speed that realizes smoke exhaust ventilator, and energy savings.
The utility model embodiment is achieved in that
A kind of frequency converter comprises:
The rectification circuit that is connected with voltage input end, said rectification circuit converts the alternating current of said voltage input end input to direct current;
With the inverter circuit that said rectification circuit is connected, said inverter circuit converts said direct current to three-phase alternating current and sends to three phase electric machine;
With the microprocessor that said inverter circuit is connected, said microprocessor changes into pulse-width signal to control said inverter circuit with the rate signal that obtains.
Preferably, in above-mentioned frequency converter, between said rectification circuit and said inverter circuit, also be provided with filter circuit, said filter circuit carries out Filtering Processing to said direct current.
Preferably, in above-mentioned frequency converter, between said rectification circuit and said inverter circuit, also be provided with circuit of power factor correction.
Preferably, in above-mentioned frequency converter, also comprise the man-machine interface that is connected with said microprocessor, said man-machine interface is sent to the rate signal that obtains in the said microprocessor.
Preferably, in above-mentioned frequency converter, said inverter circuit comprises chip for driving and power semiconductor.
A kind of smoke exhaust ventilator comprises three phase electric machine, fan and frequency converter, and said frequency converter, three phase electric machine and fan are connected successively;
Said frequency converter comprises:
The rectification circuit that is connected with voltage input end, said rectification circuit converts the alternating current of said voltage input end input to direct current;
With the inverter circuit that said rectification circuit is connected, said inverter circuit converts said direct current to three-phase alternating current and sends to said three phase electric machine;
With the microprocessor that said inverter circuit is connected, said microprocessor changes into pulse-width signal to control said inverter circuit with the rate signal that obtains.
Preferably, in above-mentioned smoke exhaust ventilator, said three phase electric machine is a three-phase DC motor.
Preferably, in above-mentioned smoke exhaust ventilator, said three phase electric machine is a three-phase permanent magnet synchronous motor.
Preferably, in above-mentioned smoke exhaust ventilator, said three phase electric machine is the three-phase permanent direct current machine.
Preferably, in above-mentioned smoke exhaust ventilator, said three phase electric machine is provided with position transducer.
Compared with prior art, the technical scheme that provides of the utility model embodiment has the following advantages and characteristics:
In the scheme that the utility model provides; Convert alternating current to direct current through rectification circuit, utilize inverter circuit and microprocessor to convert this direct current to three-phase alternating current again, can realize like this three phase electric machine is carried three-phase alternating current; Wherein, The voltage of three-phase alternating current is adjustable and changeable frequency, so microprocessor can be converted into pulse-width signal with the rate signal that obtains, through the voltage of pulse-width signal control three-phase alternating current; Thereby the rate signal that microprocessor obtains is controlled the rotating speed of three phase electric machine, to realize the continuous adjusting of speed; And different speed need apply different voltages with different and realize, so the power that different voltages with different consumed is also just different, thereby has practiced thrift electric energy.Therefore, the scheme that the utility model provides not only can make the speed of three phase electric machine that continuous variation takes place, and has practiced thrift electric energy.
Description of drawings
In order to be illustrated more clearly in the utility model or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the module map of the smoke exhaust ventilator that the utility model provided;
Fig. 2 is the circuit diagram of the inverter circuit of the smoke exhaust ventilator that the utility model provided.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
In order to solve the problem that exists in the prior art, the utility model embodiment provides a kind of frequency converter and has had the smoke exhaust ventilator of this frequency converter.
Wherein, frequency converter comprises: the rectification circuit that is connected with voltage input end, and said rectification circuit converts the alternating current of said voltage input end input to direct current; With the inverter circuit that said rectification circuit is connected, said inverter circuit converts said direct current to three-phase alternating current and sends to three phase electric machine; With the microprocessor that said inverter circuit is connected, said microprocessor changes into pulse-width signal to control said inverter circuit with the rate signal that obtains.
Smoke exhaust ventilator comprises three phase electric machine, fan and frequency converter, and said frequency converter, three phase electric machine and fan are connected successively.
Because there is multiple mode in the concrete realization of above-mentioned frequency converter, is elaborated through specific embodiment below:
See also shown in Figure 1ly, shown in Figure 1 is a kind of module map of smoke exhaust ventilator, and this smoke exhaust ventilator comprises three phase electric machine 2, fan 3 and frequency converter 1, and said frequency converter 1, three phase electric machine 2 are connected with fan 3 successively; Wherein, said frequency converter 1 comprises: the rectification circuit 11 that is connected with voltage input end, and said rectification circuit 11 converts the alternating current of said voltage input end input to direct current; With the inverter circuit 12 that said rectification circuit 11 is connected, said inverter circuit 12 converts said direct current to three-phase alternating current and sends to said three phase electric machine 2; With the microprocessor 13 that said inverter circuit 12 is connected, said microprocessor 13 changes into pulse-width signal to control said inverter circuit 12 with the rate signal that obtains.
In the embodiment shown in fig. 1; Convert alternating current to direct current through rectification circuit 11, utilize inverter circuit 12 and microprocessor 13 to convert this direct current to three-phase alternating current again, can realize like this three phase electric machine 2 is carried three-phase alternating currents; Wherein, The voltage of three-phase alternating current is adjustable and changeable frequency, so microprocessor 13 can be converted into pulse-width signal with the rate signal that obtains, through the voltage of pulse-width signal control three-phase alternating current; Thereby the rate signal that microprocessor 13 obtains is controlled the rotating speed of three phase electric machine 2, to realize the continuous adjusting of speed; And different speed need apply different voltages with different and realize, so the power that different voltages with different consumed is also just different, thereby has practiced thrift electric energy.Therefore, the scheme that the utility model provides not only can make the speed of three phase electric machine 2 that continuous variation takes place, and has practiced thrift electric energy.
In the embodiment shown in fig. 1, can also between said rectification circuit 11 and said inverter circuit 12, also be provided with filter circuit 15, wherein, 15 pairs of said direct currents of filter circuit carry out Filtering Processing.Filter circuit 15 mainly is made up of electrochemical capacitor, has galvanic filtering smoothing processing and energy storage effect.
In the embodiment shown in fig. 1, between said rectification circuit 11 and said inverter circuit 12, also be provided with circuit of power factor correction 14.Wherein, Circuit of power factor correction 14 is made up of power semiconductor and control chip, and circuit of power factor correction 14 makes the electric current of input more near sinusoidal wave, thereby reduces the content of mains by harmonics; To reach the purpose that improves power factor, finally realized improving the effect of utilization rate of electrical.
In the embodiment shown in fig. 1, also comprise the man-machine interface 16 that is connected with said microprocessor 13, said man-machine interface 16 is sent to the rate signal that obtains in the said microprocessor 13.Man-machine interface 16 mainly is made up of control switch, button, remote controller and display circuit, and the people carries out control operation through button or remote controller to fan, and display circuit shows the smoke extractor operating state.
See also shown in Figure 2, shown in Figure 2 is inverter circuit 2 and microprocessor 3, said inverter circuit 2 comprises chip for driving 21 and power semiconductor; Wherein, Power semiconductor can be single power device, like MOSFET or IGBT etc., also can be SPM.Inverter circuit 2 can convert direct current to three-phase alternating current, thereby realizes the purpose of frequency modulation and voltage modulation.
In embodiment illustrated in figures 1 and 2, civil power becomes direct current through rectification circuit 11, after electrochemical capacitor 15 filtering, inserts the two ends of inverter circuit 12.Microprocessor 13 is controlled three phase electric machine 2 according to the setting signal of man-machine interface circuit.During start, microprocessor 13 produces corresponding 6 road pwm signals according to the rotating speed of setting, and drives 6 power tubes; Alternate conduction and shutoff through 6 power tubes; Produce the three-phase modulations waveform, the three-phase alternating current of Adjustable Output Voltage, changeable frequency is exported to the three phase electric machine 2 of smoke exhaust ventilator; Drive the fan 3 of smoke exhaust ventilator through three phase electric machine 2, thereby realize the electrodeless frequency control of smoke exhaust ventilator.
In the above embodiments, three phase electric machine can be three-phase DC motor, three-phase permanent magnet synchronous motor or three-phase permanent direct current machine etc.And, can also be provided with position transducer on the three phase electric machine, position transducer can conveniently detect the rotor position information of motor, and wherein, position transducer has Hall, photoelectric encoder etc.
Need to prove that Fig. 1 is the preferred embodiment that the utility model is introduced to embodiment shown in Figure 2, those skilled in the art can design more embodiment on this basis fully, therefore do not give unnecessary details herein.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the utility model or scope in other embodiments among this paper.Therefore, the utility model will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (10)
1. a frequency converter is characterized in that, comprising:
The rectification circuit that is connected with voltage input end, said rectification circuit converts the alternating current of said voltage input end input to direct current;
With the inverter circuit that said rectification circuit is connected, said inverter circuit converts said direct current to three-phase alternating current and sends to three phase electric machine;
With the microprocessor that said inverter circuit is connected, said microprocessor changes into pulse-width signal to control said inverter circuit with the rate signal that obtains.
2. frequency converter according to claim 1 is characterized in that, between said rectification circuit and said inverter circuit, also is provided with filter circuit, and said filter circuit carries out Filtering Processing to said direct current.
3. frequency converter according to claim 1 is characterized in that, between said rectification circuit and said inverter circuit, also is provided with circuit of power factor correction.
4. frequency converter according to claim 1 is characterized in that, also comprises the man-machine interface that is connected with said microprocessor, and said man-machine interface is sent to the rate signal that obtains in the said microprocessor.
5. frequency converter according to claim 1 is characterized in that said inverter circuit comprises chip for driving and power semiconductor.
6. a smoke exhaust ventilator is characterized in that, comprises three phase electric machine, fan and frequency converter, and said frequency converter, three phase electric machine and fan are connected successively;
Said frequency converter comprises:
The rectification circuit that is connected with voltage input end, said rectification circuit converts the alternating current of said voltage input end input to direct current;
With the inverter circuit that said rectification circuit is connected, said inverter circuit converts said direct current to three-phase alternating current and sends to said three phase electric machine;
With the microprocessor that said inverter circuit is connected, said microprocessor changes into pulse-width signal to control said inverter circuit with the rate signal that obtains.
7. smoke exhaust ventilator according to claim 6 is characterized in that, said three phase electric machine is a three-phase DC motor.
8. smoke exhaust ventilator according to claim 6 is characterized in that, said three phase electric machine is a three-phase permanent magnet synchronous motor.
9. smoke exhaust ventilator according to claim 6 is characterized in that, said three phase electric machine is the three-phase permanent direct current machine.
10. smoke exhaust ventilator according to claim 6 is characterized in that said three phase electric machine is provided with position transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205352780U CN202424618U (en) | 2011-12-19 | 2011-12-19 | Frequency converter and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205352780U CN202424618U (en) | 2011-12-19 | 2011-12-19 | Frequency converter and range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202424618U true CN202424618U (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205352780U Expired - Fee Related CN202424618U (en) | 2011-12-19 | 2011-12-19 | Frequency converter and range hood |
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| Country | Link |
|---|---|
| CN (1) | CN202424618U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4083519A1 (en) * | 2021-04-27 | 2022-11-02 | BSH Hausgeräte GmbH | Exhaust hood and method for operating an exhaust hood |
-
2011
- 2011-12-19 CN CN2011205352780U patent/CN202424618U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4083519A1 (en) * | 2021-04-27 | 2022-11-02 | BSH Hausgeräte GmbH | Exhaust hood and method for operating an exhaust hood |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20131219 |