CN103490696A - Control device for linear motor used in refrigerator compressor - Google Patents
Control device for linear motor used in refrigerator compressor Download PDFInfo
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- CN103490696A CN103490696A CN201310444047.2A CN201310444047A CN103490696A CN 103490696 A CN103490696 A CN 103490696A CN 201310444047 A CN201310444047 A CN 201310444047A CN 103490696 A CN103490696 A CN 103490696A
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- chip microcomputer
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- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention discloses a control device for a linear motor used in a refrigerator compressor. The control device is composed of a single-chip microcomputer main control chip, a synchronous pulse circuit, a trigger circuit, an isolating circuit, a display circuit, a man-machine interface and a current detecting unit. The single-chip microcomputer main control chip is respectively in control connection with the synchronous pulse circuit, the isolating circuit, the display circuit, the man-machine interface and the current detecting unit through data transmission lines. According to the control device, a single-chip microcomputer is adopted for controlling the control angle of a silicon controlled rectifier, so that adjustability of the input power of the compressor is achieved, the compressor can be started stably and has continuously adjustable gas displacement, and the work efficiency of the compressor is greatly improved.
Description
technical field
The present invention relates to a kind of compressor, relate in particular to a kind of control device of Moving-Coil Linear Motor for Refrigerator Compressor, belong to the Compressor Technology field.
background technology
Traditional freezer compressor includes crank, linkage, and the size of piston displacement and the top dead center position of displacement are determined by mechanical structure, are not subject to the impact of intake and exhaust pressure.This traditional compressor is driven by electric rotating machine usually, and will realize the adjustable continuously of air displacement by means of frequency conversion system, and often operating efficiency is not high.The linear compressor occurred at present changes rotation into the mechanisms such as straight-line bent axle, connecting rod owing to not comprising, therefore operating efficiency is better than traditional compressor.
The piston of the linear compressor in existing technology is all-in, and the size of piston displacement, the top dead center position of displacement not only are subject to the impact of motor actuating force, also are compressed the impact of machine intake and exhaust pressure.The size of piston displacement, the top dead center position of displacement have directly determined swept volume and the clearance volume of compressor, and then have determined the size of compressor air-discharging amount and the height of efficiency.When linear compressor is used for to refrigerator, be applied to the voltage on linear compressor by change, with the compression ratio that changes linear compressor and the refrigerating capacity that piston stroke is controlled refrigerator.At present, comparatively ripe for the exploitation of linear compressor control system abroad, performance is also more advanced, yet not only quantity is few for the linear compressor control system of domestic-developed, and it is not strong to control function, especially can not well maintain cylinder clearance volume in minimum state when regulating the compressor air-discharging amount, cause efficiency not high.
Summary of the invention
For the demand, the invention provides a kind of control device of Moving-Coil Linear Motor for Refrigerator Compressor, this control device is realized the adjustability of compressor power input by the pilot angle that adopts machine controllable silicon, not only make the starting of compressor mild and there is continuously adjustable air displacement, and greatly improved the operating efficiency of compressor.
The present invention is a kind of control device of Moving-Coil Linear Motor for Refrigerator Compressor, described control device is comprised of single-chip microcomputer main control chip, clock circuit, circuits for triggering, buffer circuit, display circuit, man-machine interface and current detecting unit, and described single-chip microcomputer main control chip is distinguished control connection clock circuit, buffer circuit, display circuit, man-machine interface and current detecting unit by data line.
In a preferred embodiment of the present invention, described single-chip microcomputer main control chip has adopted the PIC16F84A singlechip chip, and this singlechip chip internal memory is placed with the serial calibration curve information of compressor piston displacement, intake and exhaust pressure and input current.
In a preferred embodiment of the present invention, loaded interrupt service routine in described singlechip chip, this interrupt service routine comprised Check processing to synchronization pulse, to the delay process at SCR control angle, the output of trigger impulse is processed.
In a preferred embodiment of the present invention, described clock circuit includes current-limiting resistance, voltage-stabiliser tube and metal-oxide-semiconductor, its synchronous voltage signal that will obtain through the power end dividing potential drop changes synchronous square-wave pulse into by sine wave, and sends into single-chip microcomputer after overcurrent is amplified.
In a preferred embodiment of the present invention, described buffer circuit has adopted photoelectrical coupler, and this buffer circuit receives the start pulse signal by single-chip microcomputer output, and will after this signal light-coupled isolation, send into circuits for triggering.
In a preferred embodiment of the present invention, described circuits for triggering include power amplifier element and bidirectional triode thyristor, and the weak start pulse signal that these circuits for triggering are first carried buffer circuit carries out power amplification, then sends into bidirectional triode thyristor and reliably triggers.
In a preferred embodiment of the present invention, described current detecting unit first obtains the operating current of motor by being connected on accurate small resistor in compressor loop, then this operating current is sent into to single-chip microcomputer.
The present invention has disclosed a kind of control device of Moving-Coil Linear Motor for Refrigerator Compressor, this control device is realized the adjustability of compressor power input by the pilot angle that adopts machine controllable silicon, not only make the starting of compressor mild and there is continuously adjustable air displacement, and greatly improved the operating efficiency of compressor.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the structured flowchart of the control device of embodiment of the present invention Moving-Coil Linear Motor for Refrigerator Compressor;
embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Fig. 1 is the structured flowchart of the control device of embodiment of the present invention Moving-Coil Linear Motor for Refrigerator Compressor; This control device is comprised of single-chip microcomputer main control chip, clock circuit, circuits for triggering, buffer circuit, display circuit, man-machine interface and current detecting unit, and described single-chip microcomputer main control chip is distinguished control connection clock circuit, buffer circuit, display circuit, man-machine interface and current detecting unit by data line.
The control device of the Moving-Coil Linear Motor for Refrigerator Compressor that the present invention mentions has adopted the PIC16F84A singlechip chip as main control chip, this singlechip chip internal memory is placed with the serial calibration curve information of compressor piston displacement, intake and exhaust pressure and input current, also be loaded with interrupt service routine simultaneously, comprised Check processing to synchronization pulse, to the delay process at SCR control angle, the output of trigger impulse is processed; Singlechip chip is realized the adjustability of compressor power input by controlling the silicon controlled pilot angle.As shown in Figure 1, the synchronous voltage signal collected from the divider resistance Rx of transformer, after the resistance current limliting in clock circuit, voltage-stabiliser tube voltage stabilizing, its waveform changes synchronous square-wave pulse into by sine wave, this synchronous square-wave pulse obtains more precipitous rising edge of a pulse again after the metal-oxide-semiconductor in clock circuit carries out the electric current amplification, then is sent in single-chip microcomputer; After this synchronous square-wave pulse enters single-chip microcomputer, single-chip microcomputer, according to the positive and negative half cycle pilot angle of setting, is carved and is provided start pulse signal in due course.For guaranteeing single-chip microcomputer, reliablely and stablely work, this start pulse signal need be after optical coupling isolation circuit, enter circuits for triggering, the start pulse signal that circuits for triggering will be weak by inner power amplifier element carries out power amplification, then sends into bidirectional triode thyristor and reliably triggers again.Current detecting unit in this control device first obtains the operating current of motor by being connected on accurate small resistor in compressor loop, then this operating current is sent into to single-chip microcomputer, single-chip microcomputer is according to the intake and exhaust pressure of this current signal and compressor, adjust the silicon controlled pilot angle, with the displacement that guarantees piston, cylinder clearance all in optimum Working.
The control device of the Moving-Coil Linear Motor for Refrigerator Compressor proposed in the present invention is installed on display and human-computer interaction interface, is convenient to the staff and grasps in time compressor operating state and operational administrative.Simultaneously, this control device has adopted bidirectional triode thyristor, and the silicon controlled pilot angle can be regulated by Single-chip Controlling, and triggering mode is that pulse-triggered conducting, zero passage automatically shut down, and by silicon controlled, cuts the adjustability that wave energy is realized compressor power input.The course of work of bidirectional triode thyristor as shown in Figure 1, the start pulse signal of single-chip microcomputer output enters into bidirectional triode thyristor, controllable silicon is switched on, because operating current is alternating current, current waveform changes between positive half cycle and negative half period, when the operating current vanishing, controllable silicon is got back to blocking state, when next start pulse signal arrives, controllable silicon is switched on again, due to the silicon controlled pilot angle just, negative half period is consistent, therefore operating current is just, the waveform of negative half period is basically identical, when pilot angle becomes large, the time of controllable silicon in blocking state increases, operating current reduces, the input power that means compressor has reduced, when pilot angle diminishes, the time of controllable silicon in blocking state reduces, operating current increases, the input power that means compressor has increased.
The present invention has disclosed a kind of control device of Moving-Coil Linear Motor for Refrigerator Compressor, this control device is realized the adjustability of compressor power input by the pilot angle that adopts machine controllable silicon, not only make the starting of compressor mild and there is continuously adjustable air displacement, and greatly improved the operating efficiency of compressor.
The above; it is only the specific embodiment of the present invention; but protection scope of the present invention is not limited to this; any those of ordinary skill in the art are in the disclosed technical scope of the present invention; the variation that can expect without creative work or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range that claims were limited.
Claims (7)
1. the control device of a Moving-Coil Linear Motor for Refrigerator Compressor, it is characterized in that, described control device is comprised of single-chip microcomputer main control chip, clock circuit, circuits for triggering, buffer circuit, display circuit, man-machine interface and current detecting unit, and described single-chip microcomputer main control chip is distinguished control connection clock circuit, buffer circuit, display circuit, man-machine interface and current detecting unit by data line.
2. the control device of Moving-Coil Linear Motor for Refrigerator Compressor according to claim 1, it is characterized in that, described single-chip microcomputer main control chip has adopted the PIC16F84A singlechip chip, and this singlechip chip internal memory is placed with the serial calibration curve information of compressor piston displacement, intake and exhaust pressure and input current.
3. the control device of Moving-Coil Linear Motor for Refrigerator Compressor according to claim 2, it is characterized in that, loaded interrupt service routine in described singlechip chip, this interrupt service routine comprised Check processing to synchronization pulse, to the delay process at SCR control angle, the output of trigger impulse is processed.
4. the control device of Moving-Coil Linear Motor for Refrigerator Compressor according to claim 1, it is characterized in that, described clock circuit includes current-limiting resistance, voltage-stabiliser tube and metal-oxide-semiconductor, its synchronous voltage signal that will obtain through the power end dividing potential drop changes synchronous square-wave pulse into by sine wave, and sends into single-chip microcomputer after overcurrent is amplified.
5. the control device of Moving-Coil Linear Motor for Refrigerator Compressor according to claim 1, it is characterized in that, described buffer circuit has adopted photoelectrical coupler, and this buffer circuit receives the start pulse signal by single-chip microcomputer output, and will after this signal light-coupled isolation, send into circuits for triggering.
6. the control device of Moving-Coil Linear Motor for Refrigerator Compressor according to claim 1, it is characterized in that, described circuits for triggering include power amplifier element and bidirectional triode thyristor, the weak start pulse signal that these circuits for triggering are first carried buffer circuit carries out power amplification, then sends into bidirectional triode thyristor and reliably triggers.
7. the control device of Moving-Coil Linear Motor for Refrigerator Compressor according to claim 1, it is characterized in that, described current detecting unit first obtains the operating current of motor by being connected on accurate small resistor in compressor loop, then this operating current is sent into to single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310444047.2A CN103490696A (en) | 2013-09-26 | 2013-09-26 | Control device for linear motor used in refrigerator compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310444047.2A CN103490696A (en) | 2013-09-26 | 2013-09-26 | Control device for linear motor used in refrigerator compressor |
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| CN103490696A true CN103490696A (en) | 2014-01-01 |
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| CN201310444047.2A Pending CN103490696A (en) | 2013-09-26 | 2013-09-26 | Control device for linear motor used in refrigerator compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104102159A (en) * | 2014-07-22 | 2014-10-15 | 中国兵器工业集团第二一四研究所苏州研发中心 | Controllable silicon delay trigger circuit with binding function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275256A (en) * | 1997-08-14 | 2000-11-29 | 万能股份有限公司 | Method and system for varying and regulating motor speed |
| CN1355453A (en) * | 2000-11-28 | 2002-06-26 | Lg电子株式会社 | Circuit for driving linear compressor |
| CN1356472A (en) * | 2000-11-29 | 2002-07-03 | Lg电子株式会社 | Equipment and method for controlling operation of linear compressor |
| CN201039047Y (en) * | 2007-04-24 | 2008-03-19 | 洪华伟 | Remotely controllable motor soft start energy-saving controller |
-
2013
- 2013-09-26 CN CN201310444047.2A patent/CN103490696A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275256A (en) * | 1997-08-14 | 2000-11-29 | 万能股份有限公司 | Method and system for varying and regulating motor speed |
| CN1355453A (en) * | 2000-11-28 | 2002-06-26 | Lg电子株式会社 | Circuit for driving linear compressor |
| CN1356472A (en) * | 2000-11-29 | 2002-07-03 | Lg电子株式会社 | Equipment and method for controlling operation of linear compressor |
| CN201039047Y (en) * | 2007-04-24 | 2008-03-19 | 洪华伟 | Remotely controllable motor soft start energy-saving controller |
Non-Patent Citations (1)
| Title |
|---|
| 李志海等: "冰箱压缩机用直线电机的控制***", 《电机与控制应用》, vol. 33, no. 1, 31 January 2006 (2006-01-31), pages 33 - 36 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104102159A (en) * | 2014-07-22 | 2014-10-15 | 中国兵器工业集团第二一四研究所苏州研发中心 | Controllable silicon delay trigger circuit with binding function |
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Application publication date: 20140101 |