JPH01315680A - Closed motor driven compressor - Google Patents
Closed motor driven compressorInfo
- Publication number
- JPH01315680A JPH01315680A JP14749188A JP14749188A JPH01315680A JP H01315680 A JPH01315680 A JP H01315680A JP 14749188 A JP14749188 A JP 14749188A JP 14749188 A JP14749188 A JP 14749188A JP H01315680 A JPH01315680 A JP H01315680A
- Authority
- JP
- Japan
- Prior art keywords
- power source
- voltage
- inverter
- secondary power
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000006698 induction Effects 0.000 claims abstract description 13
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- OWNRRUFOJXFKCU-UHFFFAOYSA-N Bromadiolone Chemical compound C=1C=C(C=2C=CC(Br)=CC=2)C=CC=1C(O)CC(C=1C(OC2=CC=CC=C2C=1O)=O)C1=CC=CC=C1 OWNRRUFOJXFKCU-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Landscapes
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は自動車に搭載して用いられるバッテリーを電源
とした冷蔵庫等の冷凍サイクル用の密閉型電動圧縮機に
関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hermetic electric compressor for the refrigeration cycle of a refrigerator or the like, which is powered by a battery mounted on an automobile.
従来の技術
近年、観光バヌ等にはほとんど冷蔵庫が搭載されておシ
、レジャー指向に伴ない、乗用車用の冷蔵庫の需要も増
加の傾向にある。以下、図面を参照しながら、従来の密
閉型電動圧縮機の一例について説明する。第４図及び第
５図において示したものは、従来、−船釣に本戦用冷蔵
庫等に使われている、ＤＣブラシレス方式のモータを用
いたレシプロタイプの圧縮賎である。第３図はその駆動
系を示したもので、１はバッテリー、２はコントローラ
、３は圧縮機本体で、バッテリー１を一次電源とし、圧
縮機本体３からの信号に応じた矩形波を二次電源として
圧縮機本体３に出力するコントローラ２によって、圧縮
機本体３は駆動される。BACKGROUND OF THE INVENTION In recent years, most passenger vehicles have been equipped with refrigerators, and as passenger cars become more leisure-oriented, the demand for refrigerators for passenger cars is on the rise. An example of a conventional hermetic electric compressor will be described below with reference to the drawings. What is shown in FIGS. 4 and 5 is a reciprocating type compressor using a DC brushless motor, which is conventionally used in refrigerators for boat fishing and the like. Figure 3 shows the drive system. 1 is the battery, 2 is the controller, and 3 is the compressor main body. The battery 1 is the primary power source, and the rectangular wave according to the signal from the compressor main body 3 is the secondary power source. The compressor main body 3 is driven by the controller 2 which outputs power to the compressor main body 3 as a power source.
第４図は圧縮機本体３の断面図で、４は密閉容器、５は
ステータ６、マグネットロータ７とからなるＤＣブラシ
レスモータ、８は前記ＤＣブラシレスモータ５によって
駆動される、レシプロタイプの圧縮要素であり、いずれ
も密閉容器４内に収納されている。１０はマグネットロ
ータ７の位置を検出する素子、１１は素子１０を支持す
るステイで、ステータ６に固定しである。１６は素子１
０の信号を出力する出力端子で密閉容器４に固着されて
いる。１６はコントローラ２からの二次電源の入力端子
で、同じく密閉容器４に固着され、ヌテータロと接続さ
れている。FIG. 4 is a sectional view of the compressor main body 3, where 4 is a closed container, 5 is a DC brushless motor consisting of a stator 6 and a magnetic rotor 7, and 8 is a reciprocating type compression element driven by the DC brushless motor 5. Both are housed in a closed container 4. 10 is an element for detecting the position of the magnet rotor 7, and 11 is a stay that supports the element 10 and is fixed to the stator 6. 16 is element 1
It is an output terminal that outputs a 0 signal and is fixed to the airtight container 4. Reference numeral 16 denotes an input terminal for a secondary power supply from the controller 2, which is also fixed to the closed container 4 and connected to the Nutetalo.
以上のような構成において、マグネットロータ７の位置
を検出する素子１０からの信号は出力端子１５を経てコ
ントローラ２に送られ、前記信号に応じて生成された矩
形波が二次電源として、入力端子１６を経てＤＣブラシ
レスモータ５に入力され、マグネットロータ７が回転し
、圧縮要素８を駆動する。In the above configuration, a signal from the element 10 that detects the position of the magnet rotor 7 is sent to the controller 2 via the output terminal 15, and a rectangular wave generated in accordance with the signal is used as a secondary power source to the input terminal. The signal is input to the DC brushless motor 5 via the motor 16, and the magnet rotor 7 rotates to drive the compression element 8.
発明が解決しようとする課題
しかしながら以上のような構成では、圧縮機本体におい
て、マグネットロータの位置検出に要する部品点数が極
めて多く、また、これらを組立調整する工数も複雑とな
る。更に、マグネットロータ自体、鉄粉系のゴミが組立
時に付着し易く、これら鉄粉系のゴミが摺動部に入り込
み、異常摩耗。Problems to be Solved by the Invention However, in the above configuration, the number of parts required for detecting the position of the magnet rotor in the compressor main body is extremely large, and the number of steps for assembling and adjusting these parts is also complicated. Furthermore, the magnet rotor itself tends to attract iron powder dust during assembly, and these iron powder dust can get into the sliding parts, causing abnormal wear.
ロック等を引起こす等、信頼性の面でも多くの課題を残
していた。Many problems remained in terms of reliability, such as locking.
本発明は上記課題に鑑み、位置検出手段及びマグネット
ロータが不要となる密閉型電動圧縮機を提供するもので
ある。In view of the above problems, the present invention provides a hermetic electric compressor that does not require a position detection means or a magnetic rotor.
課題を解決するだめの手段
以上のような課題を解決するために本発明の密閉型電動
圧縮機は、バッテリーを一次電源とし、前記−次電源の
電圧に対し、電圧／周波数が一定となる周波数の交流を
二次電源として出力するインバータを備え、圧縮要素と
、前記二次電源によって駆動されるインダクションモー
タとを密閉容器内に収納した構成を備えたものである。Means for Solving the Problems In order to solve the above-mentioned problems, the hermetic electric compressor of the present invention uses a battery as a primary power source, and uses a battery at a frequency where the voltage/frequency is constant with respect to the voltage of the secondary power source. The compressor element includes an inverter that outputs alternating current as a secondary power source, and a compression element and an induction motor driven by the secondary power source are housed in a closed container.
作 用
本発明は上記した構成によシ、ブラシレスＤＣモータが
不要となるため、位置検出手段及びマグネットロータは
不要となる。Function: Due to the above-described configuration, the present invention eliminates the need for a brushless DC motor, and thus eliminates the need for position detection means and magnetic rotor.
実施例
以下、本発明の一実施例について、図面を参照しながら
説明する。尚、従来例と同一部品は同一符号を用いて説
明する。第１図は駆動系を示したもので、１はバッテリ
ー、２ｏはインバータ、２１に■内体体であシ、バッテ
リー１を一次電源とし、インバータ２０によって前記−
次電源とほぼ同電圧で、かつ、電圧／周波数−一定とな
るような周波数の３相交流が二次電源として出力され、
圧縮機本体２１を駆動する。前記二次電源は消費電力量
を減らすため、効率を上げる目的でＰＷＭ変調されてい
る。第２図は前記二次電源の、電圧Ｖと周波数ｆの関係
の一例を示すグラフで、縦軸に電圧ｖ１横軸に周波数ｆ
を取っている。電圧■は、バス等に使われる自動車用バ
ッテリーの一般的な電圧変動範囲である２０〜３２Ｖで
、これに対し、電圧／周波数＝０．６となる周波数を発
生することを示している。一般にインダクションモータ
の発生トルクは、すべりが小さい場合には、概略次式で
表わされる。トルり二定数×すベシ周波数×（入力電圧
／周波数）２゜従って、電圧／周波数＝一定とすること
で、はぼ定トルク特性となる。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. Note that parts that are the same as those in the conventional example will be explained using the same reference numerals. FIG. 1 shows a drive system, in which 1 is a battery, 2o is an inverter, and 21 is an internal body.The battery 1 is used as a primary power source, and the inverter 20 is used as the -
A three-phase AC with almost the same voltage as the secondary power source and a frequency such that the voltage/frequency is constant is output as the secondary power source,
The compressor main body 21 is driven. The secondary power source is PWM modulated for the purpose of increasing efficiency in order to reduce power consumption. FIG. 2 is a graph showing an example of the relationship between the voltage V and the frequency f of the secondary power supply, where the vertical axis is the voltage v, and the horizontal axis is the frequency f.
is taking. Voltage (2) is 20 to 32V, which is the general voltage fluctuation range of automobile batteries used in buses, etc., and indicates that a frequency of voltage/frequency = 0.6 is generated. Generally, the torque generated by an induction motor is approximately expressed by the following equation when the slip is small. Torque constant x total frequency x (input voltage/frequency) 2° Therefore, by setting voltage/frequency = constant, it becomes an almost constant torque characteristic.
第３図は圧縮機本体２１の断面図で、家庭用冷蔵庫でも
主流となりつつある横型ローリングピストンタイプの圧
縮機である。２２は密閉容器、２３は３相型のインダク
シコンモータで、ステータ２４、ロータ２５から構成さ
れている。２６は前記インダクションモータ２３によっ
て駆動されるローリングピストン式の圧縮要素でインダ
クションモータ２３と共に密閉容器２２に収納される。FIG. 3 is a sectional view of the compressor main body 21, which is a horizontal rolling piston type compressor that is becoming mainstream in household refrigerators. 22 is a closed container, and 23 is a three-phase inductor motor, which is composed of a stator 24 and a rotor 25. 26 is a rolling piston type compression element driven by the induction motor 23, and is housed in the closed container 22 together with the induction motor 23.
２８はインバータ２０からの二次電源の入力端子で、密
閉容器２２に固着され、ステータ２４と接続されている
。Reference numeral 28 denotes an input terminal for a secondary power source from the inverter 20, which is fixed to the closed container 22 and connected to the stator 24.
以上のような構成において、インバータ２０より二次電
源として出力される３相交流は入力端子２８を経てイン
ダクションモータ２３に入力され、インバータ２０の周
波数に対し、剥土のすべりを生じながらロータ２５が回
転し、圧縮要素２６を駆動する。In the above configuration, the three-phase alternating current output from the inverter 20 as a secondary power source is input to the induction motor 23 via the input terminal 28, and the rotor 25 is rotated while causing a stripping slide with respect to the frequency of the inverter 20. rotates and drives the compression element 26.
従って、ブラシレスＤＣモータに欠かせないマグネット
ロータの位置検出に必要な数多くの部品が本構成によっ
て不要となり、同時にこれらの部品を組立調整するため
の複雑な工数もなくなシ、極めて安価な密閉型電動圧縮
機を実現できる。更に、マグネットロータを必要としな
いため、組立時に付着する鉄系のゴミの量も減り、高い
信頼性を得ることが可能である。また、本実施例によれ
ば、−次電源と二次電源との間で電圧増幅を行なわない
ため、特別な増幅回路が不要であシ、インバータのコス
トを抵くおさえることができる。また、電圧／周波数＝
一定としたことで、−次電源の大きな電圧変動に対し、
インダクションモータは定トルり特性が得られるため、
圧縮要素の負荷トルクに完全に合わせることができ、非
常に高い効率を得ることができるとともに、インダクシ
ョンモータ自体、限界設計が可能で極めて安価なものと
なる。Therefore, this configuration eliminates the need for many parts required to detect the position of the magnetic rotor, which is indispensable for brushless DC motors, and at the same time eliminates the complicated man-hours required to assemble and adjust these parts. An electric compressor can be realized. Furthermore, since a magnetic rotor is not required, the amount of iron-based dust that adheres during assembly is reduced, making it possible to obtain high reliability. Further, according to this embodiment, since voltage amplification is not performed between the negative power supply and the secondary power supply, a special amplification circuit is not required, and the cost of the inverter can be reduced. Also, voltage/frequency =
By keeping it constant, against large voltage fluctuations in the -order power supply,
Induction motors have constant torque characteristics, so
It is possible to perfectly match the load torque of the compression element, resulting in extremely high efficiency, and the induction motor itself can be designed to its limits, making it extremely inexpensive.
なお、圧縮機起動時は、インダクションモータの場合、
通常定格電流の数倍の起動電流が流れるが、周波数、電
圧を除々に上げていく、いわゆるソフトスタートをかけ
ることで起動時の電流を低くおさえ、インバータの出力
部のスイッチング素子の容量を小さくシ、インバータの
コストを安くすることが可能である。In addition, when starting the compressor, in the case of an induction motor,
Normally, a starting current several times the rated current flows, but by gradually increasing the frequency and voltage, a so-called soft start is applied to keep the starting current low and reduce the capacitance of the switching elements in the inverter's output section. , it is possible to reduce the cost of the inverter.
発明の効果
以上のように本発明はバッテリーを一次電源とし、前記
−次電源の電圧に対し、電圧／周波数が一定となる周波
数の交流を二次電源として出力するインバータを備え、
圧縮要素と、前記二次電源によって駆動されるインダク
ションモータトヲ密閉容器内に収納することにより、ロ
ータの位置検出手段及びマグネットロータが不要となシ
、極めて安価で、信頼性の高い密閉型電動圧縮機を実現
できる。Effects of the Invention As described above, the present invention uses a battery as a primary power source, and is equipped with an inverter that outputs, as a secondary power source, alternating current at a frequency whose voltage/frequency is constant with respect to the voltage of the secondary power source,
By housing the compression element and the induction motor driven by the secondary power source in a sealed container, there is no need for rotor position detection means or a magnetic rotor, resulting in extremely low cost and highly reliable sealed electric compression. machine can be realized.
第１図は本発明の一実施例における駆動系を示した関係
図、第２図は二次電源の電圧と周波数との関係を示すグ
ラフ、第３図は圧縮機本体の断面図、第４図は従来例の
駆動系を示した関連図、第６図は同じく圧縮機本体の断
面図である。
１・・・・・・バッテリー、２ｏ・・・・・・インバー
タ、２２・・・・・・密閉容器、２３・・・・・・イン
ダクションモータ、２６・・・・・・圧縮要素。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名ｌ−
−バヅテリー
２０−インノＶ−夕
第１図
第２図
Ｍ″ｉｌ牧
２２−８閘スＸ
第３図
第４図
正
第５図Fig. 1 is a relational diagram showing the drive system in one embodiment of the present invention, Fig. 2 is a graph showing the relationship between the voltage and frequency of the secondary power source, Fig. 3 is a sectional view of the compressor main body, and Fig. 4 is a graph showing the relationship between the voltage and frequency of the secondary power source. The figure is a related diagram showing a conventional drive system, and FIG. 6 is a sectional view of the compressor main body. 1...Battery, 2o...Inverter, 22...Airtight container, 23...Induction motor, 26...Compression element. Name of agent: Patent attorney Toshio Nakao and one other person
- Buds Terry 20 - Inno V - Evening Fig. 1 Fig. 2 M''il Maki 22-8 lock X Fig. 3 Fig. 4 Fig. 5
Claims (1)
、電圧／周波数が一定となる周波数の交流を二次電源と
して出力するインバータを備え、圧縮要素と、前記二次
電源によって駆動されるインダクションモータとを密閉
容器内に収納した密閉型電動圧縮機。A battery is used as a primary power source, and an inverter is provided that outputs, as a secondary power source, an alternating current having a constant voltage/frequency with respect to the voltage of the primary power source, and a compression element and an induction motor driven by the secondary power source. A hermetic electric compressor that stores the air in a sealed container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14749188A JPH01315680A (en) | 1988-06-15 | 1988-06-15 | Closed motor driven compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14749188A JPH01315680A (en) | 1988-06-15 | 1988-06-15 | Closed motor driven compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01315680A true JPH01315680A (en) | 1989-12-20 |
Family
ID=15431593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14749188A Pending JPH01315680A (en) | 1988-06-15 | 1988-06-15 | Closed motor driven compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01315680A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0528102A2 (en) * | 1991-08-20 | 1993-02-24 | Tecumseh Products Company | Protection circuit in inverter for refrigerators |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49129823A (en) * | 1973-04-20 | 1974-12-12 | ||
| JPS50135605A (en) * | 1974-04-09 | 1975-10-28 | ||
| JPS59578B2 (en) * | 1979-07-30 | 1984-01-07 | 新日本製鐵株式会社 | Strip heating device for continuous annealing furnace |
| JPS6356195A (en) * | 1986-08-25 | 1988-03-10 | Toshiba Corp | Refrigeration unit |
-
1988
- 1988-06-15 JP JP14749188A patent/JPH01315680A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49129823A (en) * | 1973-04-20 | 1974-12-12 | ||
| JPS50135605A (en) * | 1974-04-09 | 1975-10-28 | ||
| JPS59578B2 (en) * | 1979-07-30 | 1984-01-07 | 新日本製鐵株式会社 | Strip heating device for continuous annealing furnace |
| JPS6356195A (en) * | 1986-08-25 | 1988-03-10 | Toshiba Corp | Refrigeration unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0528102A2 (en) * | 1991-08-20 | 1993-02-24 | Tecumseh Products Company | Protection circuit in inverter for refrigerators |
| EP0528102A3 (en) * | 1991-08-20 | 1993-06-16 | Tecumseh Products Company | Protection circuit in inverter for refrigerators |
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