CN202305651U - Detection circuit for zero-crossing signal in alternating-current motor speed-regulating device - Google Patents
Detection circuit for zero-crossing signal in alternating-current motor speed-regulating device Download PDFInfo
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- CN202305651U CN202305651U CN 201120397294 CN201120397294U CN202305651U CN 202305651 U CN202305651 U CN 202305651U CN 201120397294 CN201120397294 CN 201120397294 CN 201120397294 U CN201120397294 U CN 201120397294U CN 202305651 U CN202305651 U CN 202305651U
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Abstract
The utility model discloses a detection circuit for a zero-crossing signal in an alternating-current motor speed-regulating device and relates to the field of the alternating-current motor speed-regulating device. A live wire (L) is connected with one end of a resistor (5); the other end of the resistor (5) is respectively connected with the positive end of a first diode (3), the negative end of a second diode (4) and a first end (7) of a micro control unit (MCU) simultaneously; the first end (7) of the micro control unit (MCU) is connected with the zero-crossing signal (1); the negative end of the first diode (3) is respectively connected with a power supply (VCC) and a fourth end (10) of the MCU simultaneously; a zero line (N) is respectively connected with the positive end of the second diode (4), a second end (8) of the MCU and a grounding end (6) simultaneously; and a third end (9) of the MCU is connected with a control signal (2); and a 220V alternating current is connected between the live wire (L) and the zero line (N).
Description
Technical field
The utility model relates to speed regualtion of AC motor device field, the zero cross signal testing circuit in particularly a kind of speed regualtion of AC motor device.
Background technology
The arrangements for speed regulation of common alternating current generator are to adopt thyristor to control.Through the adjustment thyristor difference opening shutoff and can change the voltage that is added in the motor two ends constantly, thereby realize the speed governing of alternating current generator.For be total in the industry know be because the electrical specification of thyristor, when be added in anode and negative electrode alternating voltage from just becoming negative the time thyristor can automatically shut down the restriction of uncontrolled signal.Therefore must constantly apply and open control signal, could guarantee that thyristor continues conducting to thyristor.So, in control circuit, need to gather the zero cross signal of alternating voltage, offer the microcontroller of being responsible for Electric Machine Control, produce and open control signal and act on thyristor, realize VSC to motor.
Referring to Fig. 1, zero cross signal testing circuit of the prior art will be kept apart forceful electric power end and MCU (Micro Controller Unit, microcontroller) end, and the device of isolation is generally LMDS Light Coupled Device or transformer.Simultaneously, also will alternating voltage be carried out full-wave rectification, convert square wave to through overdrive circuit again and export to MCU, the electron device of like this using is many, and cost is higher.
The utility model content
In order to reduce the number of electron device, reduce production costs, the utility model provides the zero cross signal testing circuit in a kind of speed regualtion of AC motor device, sees hereinafter for details and describes:
Zero cross signal testing circuit in a kind of speed regualtion of AC motor device comprises: live wire, zero line, microcontroller, zero cross signal and control signal also comprise: power supply, first diode, second diode, resistance and earth terminal,
One end of said live wire and said resistance links to each other; The other end of said resistance connects the negative polarity end of the positive ends of said first diode, said second diode and first end of said microcontroller respectively simultaneously, the first termination zero cross signal of said microcontroller; The negative polarity end of said first diode connects the 4th end of said power supply and said microcontroller respectively simultaneously; Said zero line connects second end and the said earth terminal of the positive ends of said second diode, said microcontroller respectively simultaneously; The said control signal of the 3rd termination of said microcontroller connects the 220V alternating current between said live wire and the said zero line.
The model of said resistance is 357K Ω, 2W; The model of said first diode and said second diode is 1N4148; The model of said microcontroller is MEAG48.
The beneficial effect of the technical scheme that the utility model provides is:
The utility model provides the zero cross signal testing circuit in a kind of speed regualtion of AC motor device, and this circuit is succinct and save cost, has improved reliability, has satisfied the needs in the practical application.
Description of drawings
The structural representation of the zero cross signal testing circuit that Fig. 1 provides for prior art;
The structural representation of the zero cross signal testing circuit in a kind of speed regualtion of AC motor device that Fig. 2 provides for the utility model.
The components listed tabulation is as follows in the accompanying drawing:
1: zero cross signal; 2: control signal;
3: the first diodes; 4: the second diodes;
5: resistance; 6: earth terminal;
7: first end of microcontroller; 8: second end of microcontroller;
9: the 3rd end of microcontroller; 10: the 4th end of microcontroller;
L: live wire; N: zero line;
MCU: microcontroller; VCC: power supply.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer, will combine accompanying drawing that the utility model embodiment is done to describe in detail further below.
In order to reduce the number of electron device, reduce production costs, the utility model embodiment provides the zero cross signal testing circuit in a kind of speed regualtion of AC motor device, referring to Fig. 2, sees hereinafter for details and describes:
Zero cross signal testing circuit in a kind of speed regualtion of AC motor device comprises: live wire L, zero line N, microcontroller MCU, zero cross signal 1 and control signal 2 also comprise: power supply VCC, first diode 3, second diode 4, resistance 5 and earth terminal 6,
One end of live wire L and resistance 5 links to each other, and the other end of resistance 5 connects the positive ends of first diode 3, the negative polarity end of second diode 4 and first end 7 of microcontroller MCU respectively simultaneously, and first end 7 of microcontroller MCU is taken over zero-signal 1; The negative polarity end of first diode 3 connects the 4th end 10 of power supply VCC and microcontroller MCU respectively simultaneously; Zero line N connects the positive ends of second diode 4, second end 8 and the earth terminal 6 of microcontroller MCU respectively simultaneously; The 3rd end 9 of microcontroller MCU connects control signal 2, connects the 220V alternating current between live wire L and the zero line N.
Wherein, the generation of the zero cross signal in the embodiment of the invention 1 is accomplished by first diode 3, second diode 4 and resistance 5.
Wherein, If inner integrated first diode 3 of microcontroller MCU, second diode 4; The generation of zero cross signal 1 only just can be reduced to and accomplished by resistance 5; Cooperate microcontroller MCU inner first diode 3, second diode 4 and Interrupt Process circuit again, just can realize the zero passage detection of 220V alternating current.
Wherein, in circuit design, second end 8 of microcontroller MCU and the zero line N equipotential of alternating current make and need not carry out the isolation of strong and weak electricity.
Wherein, microcontroller MCU has two-way down trigger function, promptly can be jumped along triggering by going up of zero cross signal and interrupt, and also can be interrupted along triggering by the following jumping of zero cross signal, so just no longer needs rectification circuit.
Wherein, in order to reduce manufacturing cost, and export signal preferably, the model of the preferred resistance 5 of the utility model embodiment is 357K Ω, 2W; The model of first diode 3 and second diode 4 is 1N4148; The model of microcontroller MCU is MEAG48.
In sum, the utility model embodiment provides the zero cross signal testing circuit in a kind of speed regualtion of AC motor device, and this circuit is succinct and save cost, has improved reliability, has satisfied the needs in the practical application.
It will be appreciated by those skilled in the art that accompanying drawing is the synoptic diagram of a preferred embodiment, above-mentioned the utility model embodiment sequence number is not represented the quality of embodiment just to description.
The above is merely the preferred embodiment of the utility model, and is in order to restriction the utility model, not all within the spirit and principle of the utility model, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (2)
1. the zero cross signal testing circuit in the speed regualtion of AC motor device; Comprise: live wire (L), zero line (N), microcontroller (MCU), zero cross signal (1) and control signal (2); It is characterized in that; Also comprise: power supply (VCC), first diode (3), second diode (4), resistance (5) and earth terminal (6)
Said live wire (L) links to each other with an end of said resistance (5); The other end of said resistance (5) connects the positive ends of said first diode (3), the negative polarity end of said second diode (4) and first end (7) of said microcontroller (MCU) respectively simultaneously, and first end (7) of said microcontroller (MCU) is taken over zero-signal (1); The negative polarity end of said first diode (3) connects the 4th end (10) of said power supply (VCC) and said microcontroller (MCU) respectively simultaneously; Said zero line (N) connects second end (8) and the said earth terminal (6) of the positive ends of said second diode (4), said microcontroller (MCU) respectively simultaneously; The 3rd end (9) of said microcontroller (MCU) connects said control signal (2), connects the 220V alternating current between said live wire (L) and the said zero line (N).
2. the zero cross signal testing circuit in a kind of speed regualtion of AC motor device according to claim 1 is characterized in that the model of said resistance (5) is 357K Ω, 2W; The model of said first diode (3) and said second diode (4) is 1N4148; The model of said microcontroller (MCU) is MEAG48.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120397294 CN202305651U (en) | 2011-10-18 | 2011-10-18 | Detection circuit for zero-crossing signal in alternating-current motor speed-regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120397294 CN202305651U (en) | 2011-10-18 | 2011-10-18 | Detection circuit for zero-crossing signal in alternating-current motor speed-regulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202305651U true CN202305651U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120397294 Expired - Lifetime CN202305651U (en) | 2011-10-18 | 2011-10-18 | Detection circuit for zero-crossing signal in alternating-current motor speed-regulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202305651U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237616A (en) * | 2014-09-22 | 2014-12-24 | 深圳市安邦信电子有限公司 | Voltage and current zero crossing point detection circuit of motor |
| CN113391572A (en) * | 2020-03-12 | 2021-09-14 | 浙江苏泊尔家电制造有限公司 | Control method and control circuit for cooking appliance and cooking appliance |
-
2011
- 2011-10-18 CN CN 201120397294 patent/CN202305651U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237616A (en) * | 2014-09-22 | 2014-12-24 | 深圳市安邦信电子有限公司 | Voltage and current zero crossing point detection circuit of motor |
| CN104237616B (en) * | 2014-09-22 | 2017-11-17 | 深圳市安邦信电子有限公司 | Electric moter voltage current zero-crossing point detects circuit |
| CN113391572A (en) * | 2020-03-12 | 2021-09-14 | 浙江苏泊尔家电制造有限公司 | Control method and control circuit for cooking appliance and cooking appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |