CN202121538U - Speed measurement feedback circuit of drum type washing machine motor and washing device possessing speed measurement feedback circuit - Google Patents
Speed measurement feedback circuit of drum type washing machine motor and washing device possessing speed measurement feedback circuit Download PDFInfo
- Publication number
- CN202121538U CN202121538U CN2011202134197U CN201120213419U CN202121538U CN 202121538 U CN202121538 U CN 202121538U CN 2011202134197 U CN2011202134197 U CN 2011202134197U CN 201120213419 U CN201120213419 U CN 201120213419U CN 202121538 U CN202121538 U CN 202121538U
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- motor
- chip microcomputer
- feedback circuit
- washing machine
- speed measurement
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Abstract
The utility model relates to a speed measurement feedback circuit of a drum type washing machine motor. The speed measurement feedback circuit includes a speed measurement motor which is arranged in a series excited motor, a one-chip microcomputer, and a shaping circuit which is arranged between an output terminal of the speed measurement motor and an I/O port of the one-chip microcomputer. The one-chip microcomputer outputs a control signal to the series excited motor; the one-chip microcomputer operates a washing machine computer controlled program to modulate the series excited motor; the speed measurement motor feedbacks the rotation condition of the series excited motor to the one-chip microcomputer; the one-chip microcomputer further controls the rotation speed of the series excited motor based on a feedback signal via the methods of the PID, and the like, so a control-feedback-control closed loop of the series excited motor is formed, and consequently the series excited motor can be accelerated and decelerated stably, and a drum type washing machine can achieve the more stable and reliable washing effects with less cloth damages. The shaping circuit is used to convert a signal waveform output from the speed measurement motor into a waveform which can be judged by the washing machine computer controlled program. A washing device possessing the speed measurement feedback circuit is also provided.
Description
Technical field
The utility model relates to feedback circuit, the feedback circuit that especially a kind of motor that is used for roller washing machine tests the speed; In addition, the utility model also relates to a kind of device that has above-mentioned feedback circuit.
Background technology
Difference according to mode of washing; Washing machine can be divided into three kinds of stirring-types, impeller-type, drum-type; The applied countries and regions of three types washing machine are difference to some extent, and specifically, drum type washing machine is used more in Europe; Agitator type washing machine is then more in the U.S. and Central and South America application, and impeller type washing machine then is primarily aimed at China and market, Southeast Asia.
The living standard of Along with people's improves, and washing machine more and more becomes an important consideration standard selecting washing machine for the clothing degree of wear in laundry processes, therefore, the lightest roller washing machine of clothing wear intensity has been received consumers in general's favor.For roller washing machine, the wear intensity and the rotating speed of motor of clothing have confidential relation, and be in order when reaching better clean result, to take into account the lightest clothing wear intensity of degree again, particularly important to the control of motor.
Mostly the motor that roller washing machine adopts is series excited machine, and common series excited machine mainly partly is made up of stator, rotor, front and back housing, heat radiation fan blade etc.Wherein, the effect of stator is to produce magnetic flux, magnetic conduction and support front and rear covers; The effect of rotor is to produce electromagnetic torque and guarantee its continuity, through the acting of rotating shaft drive load, electric energy is converted into mechanical energy; Front and rear covers plays the effect of supporting armature and the stator and rotor binding being fixed as one.This motor makes Computerized controller can't know the current rotating speed of motor owing to there is not the motor speed measuring reponse system, and then, can't effectively control motor.
The utility model content
The purpose of the utility model is to overcome the shortcoming that prior art intermediate roll washing machine does not have the motor feedback circuit, proposes the feedback circuit that a kind of motor that is used for roller washing machine tests the speed; The utility model has also proposed a kind of device that has above-mentioned feedback circuit.
For achieving the above object, first technical scheme that the utility model adopted is:
A kind of feedback circuit that tests the speed of roller washing machine motor comprises the shaping circuit between the I/O mouth that is arranged on speed measuring motor, single-chip microcomputer, the output that is arranged on speed measuring motor and single-chip microcomputer in the series excited machine, and single-chip microcomputer outputs control signals to series excited machine.
Be preset with the washing machine computer program in the single-chip microcomputer; And through control controllable silicon, relay, series excited machine is modulated, the speed measuring motor that is arranged in the series excited machine feeds back to single-chip microcomputer with the rotation situation of series excited machine with the form of signal; Single-chip microcomputer is according to feedback signal; Further remove to control the rotating speed of series excited machine through methods such as PID, formed the control-feedback-control closed loop of a series excited machine, under the control of this close loop control circuit; Series excited machine can quicken stably, slow down, and makes roller washing machine reach stable more, reliable, clothing is damaged lighter clean result.Shaping circuit is used for the signal waveform of speed measuring motor output is converted into the waveform that a washing machine computer program can be judged.
Technique scheme can also be further perfect:
As preferably, speed measuring motor sine wave output signal is to shaping circuit, the I/O mouth of shaping circuit output square-wave signal to single-chip microcomputer.Shaping circuit is converted into the square-wave signal input single-chip microcomputer that the washing machine computer program can be judged with the sine wave signal of speed measuring motor output.
As preferably; Shaping circuit comprises triode and diode; The emitter of triode is connected with two signal output parts of speed measuring motor respectively with base stage, and the collector electrode of triode is connected with the I/O mouth of single-chip microcomputer, and the positive pole of diode is connected with base stage, negative pole is connected with emitter.
When speed measuring motor was operated in positive half cycle, voltage can slowly rise, and the base voltage that makes triode when voltage ratio is during greater than 0.7V, the triode conducting, and this moment, collector electrode output was about 5V, and the I/O mouth of single-chip microcomputer detects and is judged as high level; Along with the variation of sine wave, when base voltage during less than 0.7V, triode ends, this moment collector voltage near 0V, the I/O mouth of single-chip microcomputer is detected to be low level.When speed measuring motor was operated in negative half period, because the unidirectional on state characteristic of diode, the voltage of transistor base and emitter was clamped at the forward voltage drop of diode all the time, to guarantee that triode can not burnt out.Base voltage is less than 0.7V at this moment, and triode is to end, and the collector electrode of triode is near 0V, and the I/O mouth of single-chip microcomputer detects low level.
As preferably, shaping circuit also comprises first current-limiting resistance and second current-limiting resistance between the signal output part that is connected to emitter, base stage and speed measuring motor.Because the difference of series excited machine parameter; The amplitude of the sine wave signal of detection motor output is just different; Generally at 20VAC to not waiting between the 50VAC, base stage and emitter in order to protect triode have added first, second current-limiting resistance; Let triode be operated under the reliable state, can be not breakdown because of overcurrent.
As preferably, shaping circuit also comprises a filter capacitor, and the two ends of filter capacitor are electrically connected at emitter and base stage respectively.Filter capacitor has played the effect of filtering, makes the voltage of input triode more level and smooth.
Second technical scheme that the utility model adopted is:
A kind of wash mill comprises the above-mentioned feedback circuit that tests the speed.
Because the employing of technique scheme, the utility model compared with prior art has the following advantages:
Through speed measuring motor and shaping circuit are set; Form the control-feedback-control closed loop of a series excited machine, a series of square waves that single-chip microcomputer will be collected are judged through detecting; Can learn the velocity of rotation of series excited machine; This speed just can be obtained error with the speed contrast of setting, thereby, make roller washing machine reach stable more, reliable, clothing is damaged lighter clean result further through pid algorithm control series excited machine rotating speed.
Description of drawings
Fig. 1 is a kind of electric theory diagram of the utility model;
Fig. 2 is a kind of circuit diagram of the utility model;
Wherein: 1, speed measuring motor; 2, single-chip microcomputer; 3, shaping circuit; 4, series excited machine; TR101, triode; D101, diode; R103, first current-limiting resistance; R104, second current-limiting resistance; C102, filter capacitor.
Embodiment
The feedback circuit that tests the speed of roller washing machine motor as shown in Figure 1; Comprise the shaping circuit 3 between the I/O mouth that is arranged on speed measuring motor 1 (being denoted as symbol T among Fig. 2), single-chip microcomputer 2, the output that is arranged on speed measuring motor 1 and single-chip microcomputer 2 in the series excited machine 4, single-chip microcomputer 2 outputs control signals to series excited machine 4.The sine wave signal of speed measuring motor 1 output becomes the I/O mouth that square-wave signal exports single-chip microcomputer 2 to through behind the shaping circuit 3.
Wherein, The two ends of the first current-limiting resistance R103 connect first output, the Vcc end of speed measuring motor 1 respectively; In the present embodiment, Vcc terminal voltage value is 5V, and two ends of the second current-limiting resistance R104 connect second output of speed measuring motor 1 and the base stage B of triode TR101 respectively.As shown in Figure 2, filter capacitor C102, diode D101 and resistance R 102 threes parallel connection, and insert between the emitter E and base stage B of triode TR101.
As shown in Figure 2, resistance R 101 is taken between the collector electrode C and zero potential ground GND of TR101 with capacitor C 101 parallelly connected accesses three.
When speed measuring motor 1 was operated in positive half cycle, voltage can slowly rise, and the base stage B voltage that makes triode TR101 when voltage ratio is during greater than 0.7V, triode TR101 conducting, and this moment, collector electrode C output was about 5V, and the I/O mouth of single-chip microcomputer 2 detects and is judged as high level; Along with the variation of sine wave, when base stage B voltage during less than 0.7V, triode TR101 ends, this moment collector electrode C voltage near 0V, the I/O mouth of single-chip microcomputer 2 is detected to be low level.When speed measuring motor 1 was operated in negative half period, because the unidirectional on state characteristic of diode D101, the voltage of triode TR101 base stage B and emitter E was clamped at the forward voltage drop of diode D101 all the time, to guarantee that triode TR101 can not burnt out.Base stage B voltage is less than 0.7V at this moment, and triode TR101 ends, and the collector electrode C of triode TR101 is near 0V, and the I/O mouth of single-chip microcomputer 2 detects low level.
Be preset with the washing machine computer program in the single-chip microcomputer 2; And through control controllable silicon, relay, series excited machine 4 is modulated, the speed measuring motor 1 that is arranged in the series excited machine 4 feeds back to single-chip microcomputer 2 with the rotation situation of series excited machine 4 with the form of signal; Single-chip microcomputer 2 is according to feedback signal; Further remove to control the rotating speed of series excited machine 4 through methods such as PID, formed the control-feedback-control closed loop of a series excited machine 4, under the control of this close loop control circuit; Series excited machine 4 can quicken stably, slow down, and makes roller washing machine reach stable more, reliable, clothing is damaged lighter clean result.
Should be understood that this embodiment only to be used to the utility model is described and be not used in the restriction the utility model scope.Should be understood that in addition those skilled in the art can do various changes or modification, be equal to replacement etc. the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (7)
1. the feedback circuit that tests the speed of a roller washing machine motor; It is characterized in that: it comprises the shaping circuit (3) between the I/O mouth that is arranged on speed measuring motor (1), single-chip microcomputer (2), the output that is arranged on described speed measuring motor (1) and described single-chip microcomputer (2) in the series excited machine (4), and described single-chip microcomputer (2) outputs control signals to described series excited machine (4).
2. the feedback circuit that tests the speed of roller washing machine motor according to claim 1; It is characterized in that: described speed measuring motor (1) sine wave output signal to described shaping circuit (3), the I/O mouth of described shaping circuit (3) output square-wave signal to described single-chip microcomputer (2).
3. the feedback circuit that tests the speed of roller washing machine motor according to claim 2; It is characterized in that: described shaping circuit (2) comprises triode (TR101) and diode (D101); The emitter (E) of described triode (TR101) is connected with two signal output parts of described speed measuring motor (1) respectively with base stage (B); The collector electrode (C) of described triode (TR101) is connected with the I/O mouth of described single-chip microcomputer (2), and the positive pole of described diode (D101) is connected with described base stage (B), negative pole is connected with described emitter (E).
4. the feedback circuit that tests the speed of roller washing machine motor according to claim 3 is characterized in that: described shaping circuit (2) also comprises first current-limiting resistance (R103) and second current-limiting resistance (R104) between the signal output part that is connected to described emitter (E), base stage (B) and described speed measuring motor (1).
5. according to the feedback circuit that tests the speed of claim 3 or 4 described roller washing machine motors; It is characterized in that: described shaping circuit (2) also comprises a filter capacitor (C102), and the two ends of described filter capacitor (C102) are electrically connected at described emitter (E) and base stage (B) respectively.
6. a wash mill is characterized in that, it has like any described feedback circuit that tests the speed in the claim 1 ~ 4.
7. a wash mill is characterized in that, it has the feedback circuit that tests the speed as claimed in claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202134197U CN202121538U (en) | 2011-06-23 | 2011-06-23 | Speed measurement feedback circuit of drum type washing machine motor and washing device possessing speed measurement feedback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202134197U CN202121538U (en) | 2011-06-23 | 2011-06-23 | Speed measurement feedback circuit of drum type washing machine motor and washing device possessing speed measurement feedback circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202121538U true CN202121538U (en) | 2012-01-18 |
Family
ID=45462574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202134197U Expired - Lifetime CN202121538U (en) | 2011-06-23 | 2011-06-23 | Speed measurement feedback circuit of drum type washing machine motor and washing device possessing speed measurement feedback circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202121538U (en) |
-
2011
- 2011-06-23 CN CN2011202134197U patent/CN202121538U/en not_active Expired - Lifetime
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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 |
Granted publication date: 20120118 |
|
| CX01 | Expiry of patent term |