CN100394341C - Washing machine controlled via power electronic circuit - Google Patents
Washing machine controlled via power electronic circuit Download PDFInfo
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- CN100394341C CN100394341C CNB021497869A CN02149786A CN100394341C CN 100394341 C CN100394341 C CN 100394341C CN B021497869 A CNB021497869 A CN B021497869A CN 02149786 A CN02149786 A CN 02149786A CN 100394341 C CN100394341 C CN 100394341C
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- electronic circuit
- power electronic
- washing machine
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Abstract
The present invention relates to a washing machine controlled by a power electronic circuit, which has a power electronic circuit for controlling or regulating a power supply and driving an appliance in the washing machine. A control circuit of the power electronic circuit comprises a detection unit for detecting the voltage of a power supply, a setting and comparing unit for outputting a compared result of the voltage of the power supply and the rated voltage value of the built-in appliance, and a driving unit for driving the power electronic circuit according to the output of the setting and comparing unit to stabilize the voltage outputted by the power electronic circuit within the rated value of the appliance. The control circuit is further provided with a bidirectional thyristor and a pulse generating unit for the phase shift, triggering and voltage regulation of the thyristor; for the rated voltage value U0 of the appliance and the voltage value U of the power supply, the pulse generating unit generates a pulse with a phase shift angle of alpha with the power supply synchronously to trigger the bidirectional thyristor to be conducted, and alpha=arccos(2U0/U-1). Thus, the appliance can obtain a stable input. The washing machine is adaptable to different rated power supply voltages and fluctuations, low in cost, and favorable to production trade.
Description
Technical field
The present invention relates to the slightly washing machine of control of a kind of power electronics electricity, especially a kind of domestic electric washer of bidirectional thyristor control can be included into D06F33/02 in the International Patent Classification (IPC).
Background technology
The performance of Electromagnetic Drive elements such as the motor in the washing machine changes relatively more responsive for supply voltage, all need design according to a certain ratings usually, and need move in this ratings is benchmark one scope.This scope is little usually, for example, (0.94～1.06) that the accurate IEC335 in international border is defined as ratings doubly.The not good line voltage of quality tends to fluctuation and exceeds this scope, obviously influences the normal operation of washing machine, even produces safety problem.The ratings of various places line voltage even belong to same grade, also has the difference that exceeds this scope in the world.For example: the 220V grade (200,220,230,240) V arranged, the 110V grade (100,110,115,120,127) V arranged.Electromagnetic Drive elements such as the motor in the conventional washer design one by one according to above rated voltage usually; Perhaps only design a kind ofly, but reserve bigger performance allowance.The former causes kind too much, influences the dirigibility of organization of production and international trade; The latter need increase material cost.
Mu balanced circuit in the general electrotechnics is generally and detects load voltage and feed back to and adjust circuit and carry out closed-loop control.It has the higher precision of voltage regulation, but unsettled situations such as easy generation vibration; As a plurality of loads and control situation not simultaneously, need not detect respectively and control.Such circuit is used for washing machine, and cost is higher.
Summary of the invention
Technical matters to be solved by this invention is: the washing machine that a kind of Power Electronic Circuit control is provided, it can make Electromagnetic Drive element such as its motor adapt to different rated supply voltage and fluctuation thereof with a kind of the design, keep approaching performance, help the production trade and reduce cost.
Technical scheme of the present invention is a kind of washing machine of Power Electronic Circuit control, comprising: the supply unit that electric network source is provided; To the Power Electronic Circuit that described power supply is controlled or modulated, be connected in the output terminal of supply unit; Drive the electrical equipment of the mechanical system of washing machine, be connected the output terminal of Power Electronic Circuit; Control the control circuit of Power Electronic Circuit, be connected the control end of Power Electronic Circuit; It is characterized in that described control circuit comprises:
---detect the detecting unit of described supply voltage; Supply unit is connected its input end;
---export the routine processes unit of described supply voltage value and electrical equipment ratings comparative result; Described detecting unit is connected its input end;
---driver element; Described routine processes unit is connected its input end, and the control end of described Power Electronic Circuit is connected its output terminal;
Described driver element drives described Power Electronic Circuit according to the supply voltage value and the electrical equipment ratings comparative result of the output of routine processes unit, makes its output be stable at the ratings of described electrical equipment.
According to technical scheme of the present invention, the electrical equipment that drives the mechanical system of washing machine can stably work in its ratings, thereby can be only with a certain suitable ratings design; When supply voltage departs from this ratings, still can keep normal performance, thereby can adapt to different rated supply voltages and fluctuation thereof.
The further design of technical solution of the present invention is, described Power Electronic Circuit is a bidirectional thyristor, and described driver element is to trigger the pulse generation unit that described bidirectional thyristor carries out phase-shift voltage regulating; Load voltage value U for described electrical equipment
0With supply voltage value U, the phase shifting angle that the pulse generation unit takes place and described power supply is synchronous is the pulse of α, triggers described bidirectional thyristor conducting,
α＝arccos(2U
0/U-1)。
The homalographic that this formula is based on the damaged angle α sine wave of different magnitude of voltage U correspondences calculates, and to keep identical half-wave mean value, is suitable for stablizing the power performance of the Electromagnetic Drive element of washing machine.This is controlled to be open loop, and unsettled situations such as vibration can not take place, and its degree of stability also is enough to adapt to the requirement of washing machine one class electric household utensil.This design is that the intrinsic power adjustments function of the Power Electronic Circuit to conventional washer, especially bidirectional thyristor is used and realizes that cost is lower, helps the production trade.
Description of drawings
The following drawings is used to illustrate embodiments of the invention:
Fig. 1 is the control circuit sketch map of prior art washing machine.
Fig. 2 is the control circuit sketch map of embodiment of the invention washing machine.
Fig. 3 is the detecting unit sketch map of the control circuit of embodiment of the invention washing machine.
Fig. 4 is the control program block diagram of embodiment of the invention washing machine.
Embodiment
The basic comprising of prior art washing machine comprises: single-phase condenser motor and gear train thereof are located at the bottom of steel ladle, transmission of power to impeller and the washing tube dehydration barrel of holding concurrently; Solenoid valve supplies water in washing tube is held concurrently dehydration barrel; Draining valve is controlled by tractizer, the discharges such as washings in the washing and dewatering bucket.Circuit as shown in Figure 1: in washing machine, the single chip machine controlling circuit 2 of supply voltage on the connection terminal 1 of input external electrical network power supply in the computer plate drives bidirectional thyristor 31,32,33 and 34, control motor 41, solenoid valve 42 and tractor 43 respectively, the mechanical system of washing machine is washed, action such as rinsing and dehydration; Hardware and software in the single chip machine controlling circuit 2 comprises usually at least: routine processes unit 22; To the control utmost point output signal of bidirectional thyristor, make the driver element 23 of its break-make.This is typical case's formation of prior art microcomputerized control full automatic impeller formula washing machine, can certainly be agitator type washing machine or tumbling-box washing machine.The embodiment of the invention is to improve to form on the basis of this washing machine of prior art.
Shown in Fig. 2 was, the control circuit 2 ' of embodiment of the invention washing machine was to serve as that following the improvement done on the basis with single-chip microcomputer (model is motorolaMC6805 or the MC68705) control circuit 2 in the prior art washing machine computer plate shown in Figure 1:
Increase the detecting unit 21 ' that detects supply voltage in the control circuit 2 ', its input end is connected in the connection terminal 1 of input external electrical network AC power, AC supply voltage reduce, rectification and be filtered into 5V with interior DC voltage output.Present embodiment detecting unit 21 ' circuit is the improvement of original AC power zero cross detection circuit in the single chip machine controlling circuit 2 that is combined in the prior art washing machine computer plate, referring to Fig. 3:
---belong to original prior art AC power zero cross detection circuit and comprise transformer TR; rectifier bridge D1-D4; resistance R 1-R4; capacitor C 1 and C2; NPN type triode; 5V direct supply and motorolaMC6805 single-chip microcomputer; transformer TR is being reduced to about 10V from the AC supply voltage on the connection terminal 1; after the rectification through rectifier bridge D1-D4; the AC supply voltage signal is become a prescription wave pulse signal; deliver to the I/O1 mouth (also can be external interrupt mouth INT) of single-chip microcomputer; read this AC supply voltage zero cross signal by single-chip microcomputer, provide to drive and protection bidirectional thyristor 31; 32; 33 and the 34 required phase shifting angle α starting point moment.
---in the present embodiment for the improvement that detects supply voltage is to increase isolating diode D5, filter capacitor C3, divider resistance R5 and R6, its DC voltage output that is proportional to the AC supply voltage value connect single-chip microcomputer another have the I/O2 mouth of A/D translation function.
This another design is can be without transformer TR, and the half-wave rectification filtering circuit that directly connects resistance or capacitance partial pressure at connection terminal 1 is taken a sample to supply voltage; Be safety and anti-interference, sampled signal can also be isolated the I/O mouth of transporting to single-chip microcomputer again through photoelectricity.
Referring to Fig. 4, the software of the routine processes unit 22 ' in the embodiment of the invention washing machine single-chip microcomputer is based on the improvement of the software of the control program 22 of prior art washing machine, comprising:
---original zero passage detection program that belongs to prior art, read the AC supply voltage zero cross signal that the I/O1 mouth receives;
---original washing machine sequence control program that belongs to prior art;
---owing to the voltage stabilizing control program that improvement of the present invention is inserted, this program comprises:
---the voltage detecting program, the signal that the I/O2 mouth receives is done the A/D conversion, its as a result supply voltage value U transport to phase shifting angle α calculation procedure;
---phase shifting angle α calculation procedure receives the supply voltage value U that the voltage detecting program provides, and is solidified with:
---the load voltage value U of described motor 41, solenoid valve 42 and tractor 43
0
---the computing formula of phase shifting angle α: α=arccos (2U
0/ U-1).
The washing machine sequence control program receives the phase shifting angle α controlled quentity controlled variable of phase shifting angle α calculation procedure output, the zero passage of zero passage detection program output is worth and constantly from other I/O1 mouth and treated outer if the sensing input value, at motor 41, when solenoid valve 42 and/or tractor 43 need power supply, to the 23 ' output of pulse generation unit, control its α electrical angle point pulsing after each alternation zero passage, trigger bidirectional thyristor 31,32,33 and/or 34 conductings, (the damaged sine voltage of θ=π-α) is to motor 41 to make the supply voltage of complete sine wave be converted to corresponding conduction angle, solenoid valve 42 and/or tractor 43 power supplies.On control circuit 2 ' thereby the basis, increased α ≠ 0 phase-shift voltage regulating control to the control of the break-make of bidirectional thyristor 31,32,33 and/or 34 α=0 in prior art.
The rated voltage U of described motor 41, solenoid valve 42 and tractor 43
0All be designed to effective value 200V.When washing machine was powered with the different electrical power voltage U, pulse generation unit 23 ' produced corresponding phase shifting angle α=arccos (2U
0/ U-1) trigger pulse.Phase shifting angle α control situation such as following table for several rated supply voltage U of common 220V grade:
| Supply voltage U effective value (V) | 200 | 210 | 220 | 230 | 240 |
| Supply voltage U half-wave mean value (V) | 90 | 94.5 | 99 | 103.5 | 108 |
| Phase shifting angle α (degree) | 0 | 25.2 | 35.1 | 42.3 | 48.2 |
| The damaged angle of supply voltage U α half-wave mean value (V) | 90 | 90 | 90 | 90 | 90 |
Data show that bidirectional thyristor 31,32 has all kept identical half-wave mean value 90V with 33/ or 34 output voltage, can keep motor 41, solenoid valve 42 and tractor 43 performance when its rated voltage effective value 200V.Thereby the present embodiment washing machine goes for the multiple rated supply voltage of (200～240) V, perhaps works in ratings when being the power supply of 220V, its mains fluctuations expanded range of allowing is approaching ± and 10%.
Present embodiment routine processes unit 22 ' and pulse generation unit 23 ' can constitute one in described single-chip microcomputer, its output pulse directly or through photoelectricity isolation and one-level transistor power following circuit is imported bidirectional thyristor 31,32,33 or/and 34 the control utmost point through the I/O mouth.Pulse generation unit 23 ' also can be outer discrete IC of single-chip microcomputer or transistor trigger circuit unit, the phase shifting angle α controlled quentity controlled variable of routine processes unit 22 ' in the output of the I/O of single-chip microcomputer mouth to its control.The pulse that is taken place can be single square wave or spike pulse group, and these are prior art.
The present embodiment Power Electronic Circuit is except that using bidirectional thyristor; also can use power-type MOSFET, GTR (BJT), GTO and all unit to add the integrated power module of encapsulation such as holding circuit one, as the Power Electronic Circuit of the control or the modulation of elements such as IPM.These all belong to the prior art that legacy system has used.
The voltage stabilizing desired value of present embodiment is chosen to be half-wave mean value, mainly is to consider unified power or the moment output of keeping each Electromagnetic Drive element of washing machine.For motor, it is more accurate that the voltage stabilizing desired value is chosen to be the first-harmonic effective value.For tumbling-box washing machine, when controlled member had electrical heating elements in it, this desired value preferably was chosen to be effective value.The design phase shifting angle is controlled to be in π/3, can satisfy the voltage stabilizing requirement in the voltage gradation scope usually, and the harmonic effects that damaged sine wave causes is less, and the control difference on effect of above-mentioned several voltage stabilizing desired values is also not obvious.
Formula α=arccos (2U of present embodiment
0/ U-1) be that half-wave mean value phase shifting angle calculates more accurately.Consider to reduce EMS memory occupation, also can be in predetermined supply voltage range of control (being generally a voltage gradation scope), from this formula or by experiment, select about 10 α=f (U) point equably, weave into look-up routine.Also can be more simply with α=k (U
0-U) control; K is design maximum substitution α=arccos (2U of U
0/ U-1) result and (U
0-U) the ratio.It is fairly simple that the latter is used for mimic channel, can be by the linear circuit amplification coefficient in the k value design control circuit.
Present embodiment is except that controlling the voltage stabilizing of Electromagnetic Drive element, and other electric elements such as power transformer of computer plate, its ratings still are designed to the intermediate value (present embodiment is 220V) of voltage gradation scope, is enough to adapt to the change in the voltage gradation scope.
Claims (2)
1. the washing machine of a Power Electronic Circuit control comprises: the supply unit that electric network source is provided; To the Power Electronic Circuit that described power supply is controlled or modulated, be connected in the output terminal of supply unit; Drive the electrical equipment of the mechanical system of washing machine, be connected the output terminal of Power Electronic Circuit; Control the control circuit of Power Electronic Circuit, be connected the control end of Power Electronic Circuit; It is characterized in that described control circuit comprises:
---detect the detecting unit of described supply voltage; Supply unit is connected its input end;
---export the routine processes unit of described supply voltage value and electrical equipment ratings comparative result; Described detecting unit is connected its input end;
---driver element; Described routine processes unit is connected its input end, and the control end of described Power Electronic Circuit is connected its output terminal;
Described driver element drives described Power Electronic Circuit according to the supply voltage value and the electrical equipment ratings comparative result of routine processes unit output, makes the voltage of its output be stable at the ratings of described electrical equipment.
2. washing machine according to claim 1 is characterized in that: described Power Electronic Circuit is a bidirectional thyristor, and described driver element is to trigger the pulse generation unit that described bidirectional thyristor carries out phase-shift voltage regulating; Load voltage value U for described electrical equipment
0With supply voltage value U, the phase shifting angle that the pulse generation unit takes place and described power supply is synchronous is the pulse of α, triggers described bidirectional thyristor conducting, α=arccos (2U
0/ U-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021497869A CN100394341C (en) | 2002-12-13 | 2002-12-31 | Washing machine controlled via power electronic circuit |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02250268 | 2002-12-13 | ||
| CN02250268.8 | 2002-12-13 | ||
| CNB021497869A CN100394341C (en) | 2002-12-13 | 2002-12-31 | Washing machine controlled via power electronic circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1506786A CN1506786A (en) | 2004-06-23 |
| CN100394341C true CN100394341C (en) | 2008-06-11 |
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ID=34276080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021497869A Expired - Lifetime CN100394341C (en) | 2002-12-13 | 2002-12-31 | Washing machine controlled via power electronic circuit |
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| Country | Link |
|---|---|
| CN (1) | CN100394341C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4594897B2 (en) * | 2006-04-26 | 2010-12-08 | 株式会社東芝 | Washing machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07134624A (en) * | 1993-11-10 | 1995-05-23 | Matsushita Electric Ind Co Ltd | Thyristor controller |
| CN1184735A (en) * | 1997-09-24 | 1998-06-17 | 姜荣行 | Method and equipment for mfg. composite aluminium/plastic plate |
| US6137272A (en) * | 1999-11-03 | 2000-10-24 | Motorola, Inc. | Method of operating an AC-DC converter |
| CN2421304Y (en) * | 2000-02-28 | 2001-02-28 | 金羚电器有限公司 | Integrated clutching speed reducing driver |
-
2002
- 2002-12-31 CN CNB021497869A patent/CN100394341C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07134624A (en) * | 1993-11-10 | 1995-05-23 | Matsushita Electric Ind Co Ltd | Thyristor controller |
| CN1184735A (en) * | 1997-09-24 | 1998-06-17 | 姜荣行 | Method and equipment for mfg. composite aluminium/plastic plate |
| US6137272A (en) * | 1999-11-03 | 2000-10-24 | Motorola, Inc. | Method of operating an AC-DC converter |
| CN2421304Y (en) * | 2000-02-28 | 2001-02-28 | 金羚电器有限公司 | Integrated clutching speed reducing driver |
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|---|---|
| CN1506786A (en) | 2004-06-23 |
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Granted publication date: 20080611 |