JP2006067725A - Shredder - Google Patents

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JP2006067725A
JP2006067725A JP2004248412A JP2004248412A JP2006067725A JP 2006067725 A JP2006067725 A JP 2006067725A JP 2004248412 A JP2004248412 A JP 2004248412A JP 2004248412 A JP2004248412 A JP 2004248412A JP 2006067725 A JP2006067725 A JP 2006067725A
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induction motor
inverter
frequency
power source
shredder
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Inventor
Nobuo Fujishima
暢夫 藤島
Yukihiko Inagaki
幸彦 稲垣
Takuhide Fujita
卓英 藤田
Shogo Yokoyama
章吾 横山
Takahiro Nozawa
孝博 能澤
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Idec Corp
Tietech Co Ltd
Meiko Shokai Co Ltd
Oriental Co Ltd
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Idec Corp
Tietech Co Ltd
Meiko Shokai Co Ltd
Oriental Co Ltd
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Priority to JP2004248412A priority Critical patent/JP2006067725A/en
Publication of JP2006067725A publication Critical patent/JP2006067725A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a shredder having a simple structure wherein power consumption can be reduced. <P>SOLUTION: The shredder includes an inverter 12 that converts commercial power into second predetermined power, an induction motor 14 that is driven by the second predetermined power obtained by conversion, a shredding mechanism 15 that is driven by the induction motor 14 and shreds a bundle of paper, the number of revolutions detecting means 16 that detects the number of revolutions of the induction motor 14; a detector 13 that detects the frequency and the current between the inverter 12 and the induction motor 14; and a controller 17. Even when during the load operation of the shredding mechanism 15, the number of revolutions of the induction motor 14 becomes lower than the number of revolutions of the induction motor 14 during the no-load operation of the shredding mechanism 15; the controller selects a frequency, with which the current detected by the detector 13 is minimized from among frequencies with which the number of revolutions of the induction motor 14 is obtained during the no-load operation of the shredding mechanism 15; and then it controls the inverter 12 so that the selected frequency is obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、紙束を細断するシュレッダに関し、詳しくはインバータを使用して紙束を細断するシュレッダに関する。   The present invention relates to a shredder that shreds a paper bundle, and more particularly to a shredder that shreds a paper bundle using an inverter.

この種のシュレッダは、例えば特許文献１に開示された技術が知られている。この技術では、細断機構の駆動用の三相誘導電動機と、該三相誘導電動機の入力側に接続されて商用電源からの電力を三相として上記三相誘導電動機へ供給するベクトル制御インバータと、該ベクトル制御インバータの出力電圧と出力電流を検出する検出装置と、該検出装置から検出電圧と検出電流を受けて上記三相誘導電動機の負荷トルクを算出し該負荷トルクに対して最適な速度とトルクとの関係を有する特性曲線をもつように、周波数と電圧を選定して前記周波数と電圧とを上記ベクトル制御インバータへ指令する制御装置とを有している。   As this type of shredder, for example, a technique disclosed in Patent Document 1 is known. In this technology, a three-phase induction motor for driving the shredding mechanism, a vector control inverter connected to the input side of the three-phase induction motor and supplying power from a commercial power source as three-phase to the three-phase induction motor, A detection device for detecting an output voltage and an output current of the vector control inverter, and a load torque of the three-phase induction motor calculated by receiving the detection voltage and the detection current from the detection device, and an optimum speed for the load torque And a control device that selects the frequency and voltage so as to have a characteristic curve having a relationship between torque and torque, and commands the frequency and voltage to the vector control inverter.

このため、所定の負荷のときは、三相誘導電動機が設計点近傍で運転できるので、その効率は非常に良く、電力の無駄が無い。また、負荷が変動したときには、上記検出装置により負荷トルクを算出し、制御装置では、その負荷トルクに応じた運転条件が設計点近傍に設定されるように、複数の特性曲線のうちから最適なものを選定し、その特性曲線のもとで運転されるように周波数と電圧を決めてこれをベクトル制御インバータへ指令する。かくして、どのような負荷のもとでも設計点で、すなわち、きわめて効率の良い条件下で運転され、電力の無駄が少なく、大幅に節電される。
特開２００２−２１５６４３号公報 For this reason, at a predetermined load, the three-phase induction motor can be operated in the vicinity of the design point, so the efficiency is very good and there is no waste of power. Further, when the load fluctuates, the detection device calculates a load torque, and the control device sets the optimum operating condition from among a plurality of characteristic curves so that the operating condition according to the load torque is set near the design point. Select the one, determine the frequency and voltage so that it can be operated under its characteristic curve, and command this to the vector control inverter. Thus, under any load, it is operated at the design point, i.e. under extremely efficient conditions, with little waste of power and significant power savings.
JP 2002-215543 A

しかしながら、上述したシュレッダではベクトル制御インバータの出力電圧と出力電流を検出する検出装置を必要とし構成が複雑であった。   However, the shredder described above requires a detection device for detecting the output voltage and output current of the vector control inverter and has a complicated configuration.

本発明は、このような点に鑑みて創案されたものであり、簡易な構成で消費電力を少なくすることができるシュレッダを提供することを課題とする。   The present invention has been made in view of such a point, and an object thereof is to provide a shredder capable of reducing power consumption with a simple configuration.

上記課題を解決するための手段として、本発明の第１発明は、請求項１に記載されたとおりのシュレッダである。
請求項１に記載のシュレッダは、商用電源を第２の所定電源に変換するインバータと、その変換された第２の所定電源によって駆動する誘導電動機と、前記誘導電動機の駆動により紙束を細断する細断機構と、前記誘導電動機の回転数を検出する回転数検出器と、前記インバータと前記誘導電動機との間の周波数と電流とを検出する検出手段と、前記細断機構の負荷運転時における前記誘導電動機の回転数が、前記細断機構の無負荷運転時における前記誘導電動機の回転数と比較して低下した場合でも、前記細断機構の無負荷運転時における前記誘導電動機の回転数となるような周波数の中から、前記検出器で検出する電流を最小とする周波数を選定し、その選定した周波数となるように前記インバータを制御する制御装置とを備えている構成である。この構成によれば、制御手段は負荷によって誘導電動機の回転数が低下した場合でも、低下した回転数を補うような周波数を選定することができる。また選定した周波数は誘導電動機で消費する電流を少なくするような周波数である。そのため制御手段はこの選定した周波数によってインバータを制御することができる。したがって誘導電動機は消費電力を低減した運転をすることができる。 As means for solving the above-mentioned problems, a first invention of the present invention is a shredder as described in claim 1.
The shredder according to claim 1 is an inverter that converts a commercial power source into a second predetermined power source, an induction motor that is driven by the converted second predetermined power source, and a paper bundle that is shredded by driving the induction motor. A shredding mechanism, a speed detector for detecting the speed of the induction motor, a detecting means for detecting a frequency and a current between the inverter and the induction motor, and a load operation of the shredding mechanism Even if the rotation speed of the induction motor in the above-mentioned is reduced compared with the rotation speed of the induction motor during the no-load operation of the chopping mechanism, the rotation speed of the induction motor during the no-load operation of the chopping mechanism A frequency that minimizes the current detected by the detector, and a control device that controls the inverter so as to achieve the selected frequency. It is. According to this configuration, the control means can select a frequency that compensates for the reduced rotational speed even when the rotational speed of the induction motor decreases due to the load. The selected frequency is a frequency that reduces the current consumed by the induction motor. Therefore, the control means can control the inverter with the selected frequency. Therefore, the induction motor can be operated with reduced power consumption.

また本発明の第２発明は、請求項２に記載されたとおりのシュレッダである。
請求項２に記載のシュレッダは、請求項１に記載のシュレッダであって、前記商用電源と前記インバータとの間には、前記商用電源を第１の所定電源に変換する昇圧回路を備え、その第１の所定電源を前記インバータへ供給する構成である。この構成によれば、商用電源を昇圧しその昇圧した電源を誘導電動機へ供給することができる。そのため昇圧しない場合と比較すると昇圧した場合の方が誘導電動機で使用する電流を低減させることができるため抵抗損を低下させ負荷で使用する消費電力を削減できる。また昇圧回路には半導体素子を使用しているため、変圧器などで昇圧する場合と比較すると設置スペースを削減でき、発熱量も抑えることができる。
また、例えば、一般的なＡＣ１００Ｖの商用電源を昇圧回路によって約２倍に昇圧させたような場合、ＡＣ２００Ｖの商用電源でなければ一度で細断できなかったような書類（の枚数を、導入容易なＡＣ１００Ｖの商用電源を使わざるを得ないようなシュレッダの設置環境であっても、一度で細断することが可能となった。 The second invention of the present invention is a shredder as set forth in claim 2.
A shredder according to claim 2 is the shredder according to claim 1, further comprising a booster circuit for converting the commercial power source to a first predetermined power source between the commercial power source and the inverter. The first predetermined power is supplied to the inverter. According to this configuration, it is possible to boost the commercial power source and supply the boosted power source to the induction motor. Therefore, compared to the case where the voltage is not boosted, the current used in the induction motor can be reduced when the voltage is boosted, so that the resistance loss can be reduced and the power consumption used in the load can be reduced. In addition, since the booster circuit uses a semiconductor element, the installation space can be reduced and the amount of heat generated can be reduced as compared with the case where the voltage is boosted by a transformer or the like.
In addition, for example, when a general AC100V commercial power supply is boosted approximately twice by a booster circuit, it is easy to introduce the number of documents that could not be shredded at a time unless it was an AC200V commercial power supply. Even in a shredder installation environment where it is unavoidable to use an AC100V commercial power supply, it can be shredded at a time.

以下に本発明を実施するための最良の形態について図面を用いて説明する。なお特許請求の範囲に記載の「誘導電動機」は、以下の実施の形態に記載の「三相誘導電動機１４」に相当する。
図１は、本発明のシュレッダの一実施形態を表す電気的構成図である。図１に示すように、商用電源を第１の所定電源に変換する昇圧回路１１へ供給し、この昇圧回路１１で昇圧された第１の所定電源をインバータ１２へ供給し、このインバータ１２で第１の所定電源を第２の所定電源に変換し、このインバータ１２で変換された第２の所定電源を三相誘導電動機１４へ供給し、三相誘導電動機１４を駆動させている。ここで商用電源とは、例えば、単相交流１００Ｖ−５０Ｈｚの家庭用コンセント電源である。また昇圧回路１１とは、例えば半導体素子によって交流を直流へ整流してさらに昇圧させる回路であり、一般的なものを使用しているため詳細説明は省略する。また第１の所定電源とは、例えば、直流２８０Ｖに昇圧された電源である。また第２の所定電源とは、例えば、３相交流２００Ｖ−所定の周波数の電源である。この所定の周波数については後述する。 The best mode for carrying out the present invention will be described below with reference to the drawings. The “induction motor” described in the claims corresponds to the “three-phase induction motor 14” described in the following embodiments.
FIG. 1 is an electrical configuration diagram showing an embodiment of a shredder of the present invention. As shown in FIG. 1, a commercial power supply is supplied to a booster circuit 11 that converts the commercial power supply to a first predetermined power supply, and a first predetermined power supply boosted by the booster circuit 11 is supplied to an inverter 12. One predetermined power source is converted into a second predetermined power source, and the second predetermined power source converted by the inverter 12 is supplied to the three-phase induction motor 14 to drive the three-phase induction motor 14. Here, the commercial power source is, for example, a single-phase AC 100V-50Hz household outlet power source. The booster circuit 11 is a circuit that rectifies alternating current into direct current by, for example, a semiconductor element to further boost the voltage, and a general circuit is used, so that detailed description thereof is omitted. The first predetermined power source is a power source boosted to DC 280V, for example. The second predetermined power source is, for example, a three-phase AC 200V-power source having a predetermined frequency. This predetermined frequency will be described later.

また、この三相誘導電動機１４の駆動に伴って細断機構１５も駆動し紙束の細断が可能となっている。この細断機構１５とは、汎用シュレッダに用いられている細断機構（例えば、外周部に複数の切断刃を有する２つの円筒状の双方回転刃であり、これら双方回転刃は互いに噛合うように逆方向に回転可能で、この回転させた状態で細断挿入口（図示しない）から挿入された紙束をその噛合い部位に挿入して紙束を細断する機構）であるため詳細説明は省略する。また、この三相誘導電動機１４の回転軸（図示しない）の回転数を検出可能な回転数検出手段を備えている。回転数検出手段の代表例は、回転数検出用のセンサであり、例えば、パルスジェネレータ、タコジェネレータまたはエンコーダなどである。また、回転数検出手段は、回転数を検出するためのセンサを備えることなしに、制御装置が、その出力電流、その出力電圧及び制御対象たるモータの特性から、モータ回転数（の推定値）を演算して算出する方式のものであってもよい。
またインバータ１２と三相誘導電動機１４との間の周波数と電流とを検出する検出器１３を備えている。なお、以下においてこの検出器１３で検出した周波数と電流とをそれぞれ１次周波数と１次電流と記す。また、これら検出した回転数と１次周波数と１次電流とに基づいて上述した所定の周波数となるように、インバータ１２を制御する制御手段１７を備えている。 Further, as the three-phase induction motor 14 is driven, the shredding mechanism 15 is also driven so that the paper bundle can be shredded. The shredding mechanism 15 is a shredding mechanism used in a general-purpose shredder (for example, two cylindrical double-rotating blades having a plurality of cutting blades on the outer periphery, and these two rotating blades mesh with each other. This is a mechanism that can rotate in the opposite direction and inserts a paper bundle inserted from a shredding insertion port (not shown) into the meshing portion in this rotated state, so that the paper bundle is shredded. Is omitted. In addition, a rotation speed detecting means capable of detecting the rotation speed of a rotating shaft (not shown) of the three-phase induction motor 14 is provided. A typical example of the rotational speed detection means is a sensor for detecting the rotational speed, such as a pulse generator, a tachometer generator, or an encoder. Further, the rotation speed detection means does not include a sensor for detecting the rotation speed, and the control device determines the motor rotation speed (estimated value) from the output current, the output voltage, and the characteristics of the motor to be controlled. It may be of a method of calculating by calculating.
Moreover, the detector 13 which detects the frequency and electric current between the inverter 12 and the three-phase induction motor 14 is provided. Hereinafter, the frequency and current detected by the detector 13 are referred to as a primary frequency and a primary current, respectively. Moreover, the control means 17 which controls the inverter 12 is provided so that it may become the predetermined frequency mentioned above based on these detected rotation speed, primary frequency, and primary current.

続いて、制御手段１７が実施する制御について説明する。
紙束の細断を希望する利用者（以下、「利用者」と記す）は、シュレッダのスイッチをＯＮにして三相誘導電動機１４を駆動させ細断機構を運転させる。この状態では、紙束は未だ細断されていない状態であるため、三相誘導電動機１４は無負荷運転である。そして利用者は紙束を細断挿入口へ挿入し紙束を細断させていく。この状態になると、紙束は細断されていくため、三相誘導電動機１４は負荷運転である。そのため三相誘導電動機１４の回転軸の回転数は、無負荷運転時の回転数と比較して低下する。制御手段１７は回転数検出器１６から回転数の低下を検出すると、無負荷運転時の回転数に戻そうとするため、その回転数に戻すための必要な周波数を算出する。 Next, the control performed by the control unit 17 will be described.
A user who desires shredding of the paper bundle (hereinafter referred to as “user”) turns on the shredder switch to drive the three-phase induction motor 14 to operate the shredding mechanism. In this state, since the paper bundle is not yet shredded, the three-phase induction motor 14 is in a no-load operation. Then, the user inserts the paper bundle into the shredding insertion slot and shreds the paper bundle. In this state, since the paper bundle is shredded, the three-phase induction motor 14 is in a load operation. Therefore, the rotational speed of the rotating shaft of the three-phase induction motor 14 is lower than the rotational speed during no-load operation. When the control means 17 detects a decrease in the rotational speed from the rotational speed detector 16, it attempts to return to the rotational speed at the time of no-load operation, and thus calculates a necessary frequency for returning to the rotational speed.

ここで制御手段１７は、無負荷運転時の回転数に戻すための周波数を複数算出することができる。そして制御手段１７は、その算出された複数の周波数の中から１次電流を最小にすることができる周波数を選定する。その周波数を選定するために制御手段１７は、回転数検出器１６からの三相誘導電動機１４の回転数と検出器１３からの１次周波数と１次電流に基づいて、三相誘導電動機１４の２次電流を算出する。この２次電流とは、三相誘導電動機１４の回転子に流れる電流である。そして制御手段１７は、１次電流によって固定子に生じる１次磁束と算出する２次電流との位相差が９０°となるように１次周波数を算出する。このようにして１次周波数を算出すると、回転子に生ずるトルクが最大となるため、結果として１次電流は最小となる周波数を算出できることになる。この算出された周波数が所定の周波数である。   Here, the control means 17 can calculate a plurality of frequencies for returning to the rotation speed during no-load operation. And the control means 17 selects the frequency which can make a primary current the minimum from the calculated several frequency. In order to select the frequency, the control means 17 determines the frequency of the three-phase induction motor 14 based on the rotation speed of the three-phase induction motor 14 from the rotation speed detector 16 and the primary frequency and primary current from the detector 13. A secondary current is calculated. The secondary current is a current that flows through the rotor of the three-phase induction motor 14. The control means 17 calculates the primary frequency so that the phase difference between the primary magnetic flux generated in the stator by the primary current and the calculated secondary current becomes 90 °. When the primary frequency is calculated in this way, the torque generated in the rotor is maximized, and as a result, the frequency at which the primary current is minimized can be calculated. This calculated frequency is a predetermined frequency.

やがて紙束の細断が完了すると、三相誘導電動機１４は無負荷運転となる。そのため紙束が無くなったことにより三相誘導電動機１４の回転軸の回転数は、先ほどの負荷運転時の回転数と比較して増加する。制御手段１７は回転数検出器１６から回転数の増加を検出すると、負荷運転前の無負荷運転時の周波数に戻すようにインバータ１２を制御する。なお、制御手段１７は予め無負荷運転時の周波数を記憶している。   When the shredding of the paper bundle is completed, the three-phase induction motor 14 becomes a no-load operation. Therefore, the number of rotations of the rotating shaft of the three-phase induction motor 14 increases as compared with the number of rotations during the load operation just before the paper bundle is lost. When the control means 17 detects an increase in the rotational speed from the rotational speed detector 16, the control means 17 controls the inverter 12 to return to the frequency at the time of no-load operation before the load operation. The control means 17 stores in advance the frequency during no-load operation.

このようにして制御手段１７は、紙束の細断中によって細断機構１５の回転数が減少しても、減少した回転数を補うように且つ回転数を補っても電流の使用を少なくするようにインバータ１２を制御させることができる。そのため利用者はシュレッダ使用時に、紙詰まり等のトラブルが発生することがないため、安定して紙束を細断することができる。また１次電流を低減させることができるため負荷で使用する消費電力を削減できる。したがって細断コストを抑えることができる。   In this way, even if the rotation speed of the shredding mechanism 15 is reduced due to the shredding of the paper bundle, the control means 17 reduces the use of current so as to compensate for the reduced rotation speed and compensate for the rotation speed. Thus, the inverter 12 can be controlled. For this reason, when the shredder is used, the user does not have troubles such as a paper jam and can stably chop the paper bundle. Further, since the primary current can be reduced, the power consumption used by the load can be reduced. Therefore, the cutting cost can be suppressed.

また、このように昇圧回路１１を設けて、商用電源よりも三相誘導電動機１４で使用する電圧を昇圧させるため、昇圧しない場合と比較すると昇圧した場合の方が三相誘導電動機１４で使用する１次電流を低減させることができるため抵抗損を低下させ三相誘導電動機１４で使用する消費電力を削減できる。ここで抵抗損とは、インバータ１２と三相誘導電動機１４とを接続しているケーブルで消費される抵抗損、または三相誘導電動機１４の銅損などである。また昇圧回路１１には半導体素子を使用しているため、変圧器などで昇圧する場合と比較すると設置スペースを削減でき、発熱量も抑えることができる。
また、一般的なＡＣ１００Ｖの商用電源を昇圧回路によって約２倍以上に昇圧させたような場合、ＡＣ２００Ｖの商用電源でなければ一度で細断できなかったような（機密）書類の枚数を、ＡＣ２００Ｖの商用電源に比べればはるかに導入が容易なＡＣ１００Ｖの商用電源を使わざるを得ないようなシュレッダの設置環境であっても、昇圧させた電圧に応じて楽に一度で細断することが可能となった。 Further, since the booster circuit 11 is provided in this way to boost the voltage used in the three-phase induction motor 14 rather than the commercial power supply, the three-phase induction motor 14 is used when boosted compared to the case where no boost is performed. Since the primary current can be reduced, the resistance loss can be reduced and the power consumption used by the three-phase induction motor 14 can be reduced. Here, the resistance loss is a resistance loss consumed by a cable connecting the inverter 12 and the three-phase induction motor 14 or a copper loss of the three-phase induction motor 14. Since the booster circuit 11 uses a semiconductor element, the installation space can be reduced and the amount of heat generated can be suppressed as compared with the case where the voltage is boosted by a transformer or the like.
In addition, when a general AC100V commercial power supply is boosted about twice or more by a booster circuit, the number of (confidential) documents that could not be shredded at one time unless the AC200V commercial power supply is AC200V Even in a shredder installation environment where it is unavoidable to use an AC100V commercial power supply that is much easier to install than other commercial power supplies, it can be easily shredded at once according to the boosted voltage. became.

本発明のシュレッダは、本実施の形態で説明した構成、数値（例、電圧値）、構造等に限定されず、本発明の要旨を変更しない範囲で種々の変更、追加、削除が可能である。   The shredder of the present invention is not limited to the configuration, numerical value (eg, voltage value), structure, etc. described in the present embodiment, and various modifications, additions, and deletions can be made without changing the gist of the present invention. .

本発明のシュレッダの一実施形態を表す電気的構成図である。It is an electrical block diagram showing one Embodiment of the shredder of this invention.

符号の説明Explanation of symbols

１１ 昇圧回路
１２ インバータ
１３ 検出器（周波数・電流）
１４ 三相誘導電動機
１５ 細断機構
１６ 回転数検出器
１７ 制御手段



11 Booster circuit 12 Inverter 13 Detector (frequency / current)
14 Three-phase induction motor 15 Shredding mechanism 16 Speed detector 17 Control means



Claims (2)

商用電源を第２の所定電源に変換するインバータと、
その変換された第２の所定電源によって駆動する誘導電動機と、
前記誘導電動機の駆動により紙束を細断する細断機構と、
前記誘導電動機の回転数を検出する回転数検出手段と、
前記インバータと前記誘導電動機との間の周波数と電流とを検出する検出器と、
前記細断機構の負荷運転時における前記誘導電動機の回転数が、前記細断機構の無負荷運転時における前記誘導電動機の回転数と比較して低下した場合でも、前記細断機構の無負荷運転時における前記誘導電動機の回転数となるような周波数の中から、前記検出器で検出する電流を最小とする周波数を選定し、その選定した周波数となるように前記インバータを制御する、制御装置と、
を備えていることを特徴とするシュレッダ。 An inverter that converts a commercial power source to a second predetermined power source;
An induction motor driven by the converted second predetermined power source;
A shredding mechanism that shreds the paper bundle by driving the induction motor;
A rotational speed detecting means for detecting the rotational speed of the induction motor;
A detector for detecting the frequency and current between the inverter and the induction motor;
Even when the rotational speed of the induction motor during load operation of the shredding mechanism is lower than the rotational speed of the induction motor during non-load operation of the shredding mechanism, no-load operation of the shredding mechanism A control device that selects a frequency that minimizes a current detected by the detector from frequencies that become the number of rotations of the induction motor at the time, and controls the inverter so as to be the selected frequency; and ,
A shredder characterized by comprising: 請求項１に記載のシュレッダであって、
前記商用電源と前記インバータとの間には、前記商用電源を第１の所定電源に変換する昇圧回路を備え、その第１の所定電源を前記インバータへ供給することを特徴とする、シュレッダ。




The shredder according to claim 1,
A shredder comprising a booster circuit for converting the commercial power source into a first predetermined power source between the commercial power source and the inverter, and supplying the first predetermined power source to the inverter.




JP2004248412A 2004-08-27 2004-08-27 Shredder Pending JP2006067725A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5736588A (en) * 1980-08-14 1982-02-27 Toyo Electric Mfg Co Ltd Slip frequency control system
JPH08214578A (en) * 1995-01-31 1996-08-20 Matsushita Electric Ind Co Ltd Controller of air conditioner compressor
JP2000288417A (en) * 1999-03-31 2000-10-17 Tsubakimoto Chain Co Cutter
JP2004064805A (en) * 2002-07-24 2004-02-26 Shigumaa Giken Kk Document shredding apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5736588A (en) * 1980-08-14 1982-02-27 Toyo Electric Mfg Co Ltd Slip frequency control system
JPH08214578A (en) * 1995-01-31 1996-08-20 Matsushita Electric Ind Co Ltd Controller of air conditioner compressor
JP2000288417A (en) * 1999-03-31 2000-10-17 Tsubakimoto Chain Co Cutter
JP2004064805A (en) * 2002-07-24 2004-02-26 Shigumaa Giken Kk Document shredding apparatus

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