JP3888311B2 - Motor vibration detector - Google Patents

Motor vibration detector Download PDF

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Publication number
JP3888311B2
JP3888311B2 JP2003031089A JP2003031089A JP3888311B2 JP 3888311 B2 JP3888311 B2 JP 3888311B2 JP 2003031089 A JP2003031089 A JP 2003031089A JP 2003031089 A JP2003031089 A JP 2003031089A JP 3888311 B2 JP3888311 B2 JP 3888311B2
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JP
Japan
Prior art keywords
vibration
motor
peak value
voltage
commutator motor
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.)
Expired - Fee Related
Application number
JP2003031089A
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Japanese (ja)
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JP2004242469A (en
Inventor
直樹 閏間
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
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Publication date
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Priority to JP2003031089A priority Critical patent/JP3888311B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、モータ振動検出装置、特に、直流整流子モータの振動の大小を検出するためのモータ振動検出装置に関する。
【0002】
【従来の技術】
モータ、特に自動車用空調装置に使用される送風機用直流整流子モータにおいては、電流切り替わりの際の磁気変動による磁気振動が空調ユニットまで伝達し、発音するという問題があった。磁気振動の原因としてはマグネット、ブラシ等の構成部品の製造、組付のバラツキがあり、それを制御することは非常に困難である。
【0003】
そこで、従来から、モータ本体とモータケースとの間に防振材を設け、この防振材によって振動を遮断する振動遮断対策が提案されている(例えば特許文献1参照)。
【0004】
【特許文献1】
特開平11−82384号公報
【0005】
【発明が解決しようとする課題】
しかし、上記のような振動遮断対策を講じても、低周波振動を遮断することは困難であった。
【0006】
本発明は、モータ自体の磁気振動量を安価に測定することにより、低周波振動を含む振動の大きなモータのユニットへの適用を除外し、発音を未然に防止することができるモータ振動検出装置を提供することを目的とする。
【0007】
【課題を解決するための手段】
本発明のモータ振動検出装置は、直流整流子モータの電流を電圧に変換する変換器と、該変換器の出力電圧を微分する微分回路とを備え、該微分回路の出力波形の正側ピーク値と負側ピーク値との差分に基づいて前記直流整流子モータの振動の大小を判定することを特徴とする。
【0008】
本発明のモータ振動検出装置によると、直流整流子モータの磁気振動量は電流の時間変化量つまりdi/dtに比例することから、微分回路の出力波形の正側ピーク値と負側ピーク値との差分に基づいて直流整流子モータの振動の大小を容易に判定することができる。そして、振動が大きいと判定された直流整流子モータについてはユニットへの適用を除外することにより、ユニット組付後に予想される発音を未然に防止することができる。
【0009】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて説明する。
【0010】
図1は、本発明の一実施形態に係るモータ振動検出装置の構成図を示す。
【0011】
図1において、1は、自動車用空調装置を概略的に表したものであり、直流整流子モータ11は、自動車用空調装置1において、車内又は車外から装置1内に空気を取り込む送風機12の動力源となる。なお、符号13は、自動車用空調装置1において、装置1内に取り込まれた空気を冷媒及びエンジン冷却水によって熱交換する熱交換器、及び、熱交換後の空気を車内に吹出すための吹出調節部を収納した冷暖房器を表している。
【0012】
モータ振動検出装置2は、直流電源3から直流整流子モータ11に至る給電路に直列接続される電流検出用抵抗器21を備え、電流検出用抵抗器21は、直流整流子モータ11の電流を電圧に変換する変換器として機能する。電流検出用抵抗器21は微分回路22に接続される。微分回路22は、電流検出用抵抗器21の端子間電圧を入力電圧Viとし、この入力電圧Viを微分して出力電圧Voを出力する。
【0013】
直流整流子モータ11における磁気振動量は、電流の時間変化量つまりdi/dtに比例する。このため、直流整流子モータ11の電流Iを電流検出用抵抗器21によって電圧V(=I×R)として取り出し、この電圧V(Vi)を微分回路22によって微分して電圧Voを得、この電圧Voの出力波形の正側ピーク値と負側ピーク値との差分を求めることによって直流整流子モータ11の磁気振動量を間接的に求めることができる。図2は、微分回路22の入力電圧Viと、この入力電圧Viに対応する出力電圧Voの波形の一例を示す。図2において、入力電圧Viのパルス状増大部分の立上り時点及び立下り時点で出力電圧Voは正側ピーク値及び負側ピーク値をとり、正側ピーク値と負側ピーク値との差分が磁気振動量の大小として把握される。
【0014】
なお、微分回路22の出力電圧Voに基づく磁気振動量の大小判定は、微分回路22の出力電圧Voを電圧波形としてプリントアウトあるいはモニタ表示し、作業者によって正側ピーク値と負側ピーク値との差分から磁気振動量の大小を判定するようにしてもよいし、あるいは、微分回路22の出力側に図示しない演算処理回路を接続し、この演算処理回路によって磁気振動量の大小を自動判定するようにしてもよい。
【0015】
以上説明したように、本実施形態のモータ振動検出装置2は、直流整流子モータ11の電流を電圧に変換する変換器21と、変換器21の出力電圧を微分する微分回路22とを備え、微分回路22の出力波形の正側ピーク値と負側ピーク値との差分に基づいて直流整流子モータ11の振動の大小を判定する。
【0016】
このため、本実施形態のモータ振動検出装置2によると、直流整流子モータ11の磁気振動量は電流の時間変化量つまりdi/dtに比例することから、微分回路22の出力波形の正側ピーク値と負側ピーク値との差分に基づいて直流整流子モータ11の振動の大小を容易に判定することができる。そして、振動が大きいと判定された直流整流子モータ11についてはユニットへの適用を除外することにより、ユニット組付後に予想される発音を未然に防止することができる。
【0017】
【発明の効果】
本発明のモータ振動検出装置によると、モータ自体の磁気振動量を安価に測定することができ、低周波振動を含む振動の大きなモータのユニットへの適用を除外し、発音を未然に防止することができる。
【図面の簡単な説明】
【図1】本発明の一実施形態に係るモータ振動検出装置の構成図である。
【図2】微分回路の入出力電圧波形図である。
【符号の説明】
11 直流整流子モータ
2 モータ振動検出装置
21 変換器
22 微分回路
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a motor vibration detection device, and more particularly to a motor vibration detection device for detecting the magnitude of vibration of a DC commutator motor.
[0002]
[Prior art]
In a motor, particularly a DC commutator motor for a blower used in an air conditioner for automobiles, there has been a problem that magnetic vibration due to magnetic fluctuation at the time of current switching is transmitted to the air conditioning unit to generate sound. As a cause of magnetic vibration, there are variations in manufacture and assembly of components such as magnets and brushes, and it is very difficult to control them.
[0003]
Therefore, conventionally, a vibration isolating measure has been proposed in which a vibration isolating material is provided between the motor main body and the motor case, and the vibration is interrupted by the vibration isolating material (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-82384
[Problems to be solved by the invention]
However, it has been difficult to cut off low-frequency vibrations even if the above-described vibration blocking measures are taken.
[0006]
The present invention eliminates application to a motor unit with large vibration including low frequency vibration by measuring the amount of magnetic vibration of the motor itself at low cost, and a motor vibration detection device capable of preventing sound generation in advance. The purpose is to provide.
[0007]
[Means for Solving the Problems]
A motor vibration detection device of the present invention includes a converter that converts a current of a DC commutator motor into a voltage, and a differentiation circuit that differentiates an output voltage of the converter, and a positive peak value of an output waveform of the differentiation circuit The magnitude of the vibration of the DC commutator motor is determined based on the difference between the negative peak value and the negative peak value.
[0008]
According to the motor vibration detection device of the present invention, since the amount of magnetic vibration of the DC commutator motor is proportional to the time change amount of the current, that is, di / dt, the positive peak value and the negative peak value of the output waveform of the differentiation circuit The magnitude of the vibration of the DC commutator motor can be easily determined based on the difference between the two. For DC commutator motors that are determined to have large vibrations, by excluding application to the unit, it is possible to prevent the expected sound generation after unit assembly.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 is a configuration diagram of a motor vibration detection device according to an embodiment of the present invention.
[0011]
In FIG. 1, 1 schematically represents an automotive air conditioner, and a DC commutator motor 11 is a power of a blower 12 that takes air into the device 1 from inside or outside the vehicle in the automotive air conditioner 1. The source. Reference numeral 13 denotes a heat exchanger for exchanging heat of the air taken into the apparatus 1 with the refrigerant and the engine coolant in the automobile air conditioner 1 and a blowout for blowing the air after the heat exchange into the car The air conditioner which accommodated the adjustment part is represented.
[0012]
The motor vibration detection device 2 includes a current detection resistor 21 connected in series to a power supply path from the DC power supply 3 to the DC commutator motor 11, and the current detection resistor 21 detects the current of the DC commutator motor 11. It functions as a converter that converts voltage. The current detection resistor 21 is connected to the differentiation circuit 22. The differentiation circuit 22 uses the voltage across the terminals of the current detection resistor 21 as the input voltage Vi, and differentiates the input voltage Vi to output the output voltage Vo.
[0013]
The amount of magnetic vibration in the DC commutator motor 11 is proportional to the time variation of current, that is, di / dt. For this reason, the current I of the DC commutator motor 11 is taken out as a voltage V (= I × R) by the current detection resistor 21, and the voltage V (Vi) is differentiated by the differentiating circuit 22 to obtain the voltage Vo. The amount of magnetic vibration of the DC commutator motor 11 can be obtained indirectly by obtaining the difference between the positive peak value and the negative peak value of the output waveform of the voltage Vo. FIG. 2 shows an example of the waveform of the input voltage Vi of the differentiation circuit 22 and the output voltage Vo corresponding to the input voltage Vi. In FIG. 2, the output voltage Vo takes a positive peak value and a negative peak value at the rising and falling points of the pulse-like increased portion of the input voltage Vi, and the difference between the positive peak value and the negative peak value is magnetic. This is understood as the amount of vibration.
[0014]
The magnitude determination of the amount of magnetic vibration based on the output voltage Vo of the differentiation circuit 22 is printed out or displayed as a voltage waveform of the output voltage Vo of the differentiation circuit 22 and the positive peak value and negative peak value are determined by the operator. The magnitude of the magnetic vibration amount may be determined from the difference between them, or an arithmetic processing circuit (not shown) is connected to the output side of the differentiating circuit 22, and the magnitude of the magnetic vibration amount is automatically determined by this arithmetic processing circuit. You may do it.
[0015]
As described above, the motor vibration detection device 2 of the present embodiment includes the converter 21 that converts the current of the DC commutator motor 11 into a voltage, and the differentiation circuit 22 that differentiates the output voltage of the converter 21. The magnitude of the vibration of the DC commutator motor 11 is determined based on the difference between the positive peak value and the negative peak value of the output waveform of the differentiation circuit 22.
[0016]
For this reason, according to the motor vibration detection device 2 of the present embodiment, the amount of magnetic vibration of the DC commutator motor 11 is proportional to the time variation of the current, that is, di / dt, and therefore the positive peak of the output waveform of the differentiation circuit 22 The magnitude of the vibration of the DC commutator motor 11 can be easily determined based on the difference between the value and the negative peak value. Then, with respect to the DC commutator motor 11 determined to have large vibrations, by excluding application to the unit, it is possible to prevent the expected sound generation after the unit is assembled.
[0017]
【The invention's effect】
According to the motor vibration detection device of the present invention, the amount of magnetic vibration of the motor itself can be measured at a low cost, and the application to a motor unit with large vibration including low-frequency vibration is excluded and sound generation is prevented in advance. Can do.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a motor vibration detection device according to an embodiment of the present invention.
FIG. 2 is a waveform diagram of input / output voltages of a differentiating circuit.
[Explanation of symbols]
11 DC commutator motor 2 Motor vibration detection device 21 Converter 22 Differentiation circuit

Claims (1)

直流整流子モータの電流を電圧に変換する変換器と、該変換器の出力電圧を微分する微分回路とを備え、該微分回路の出力波形の正側ピーク値と負側ピーク値との差分に基づいて前記直流整流子モータの振動の大小を判定することを特徴とするモータ振動検出装置。A converter that converts the current of the DC commutator motor into a voltage; and a differentiating circuit that differentiates the output voltage of the converter; the difference between the positive peak value and the negative peak value of the output waveform of the differentiating circuit; A motor vibration detecting apparatus for determining a magnitude of vibration of the DC commutator motor based on the determination.
JP2003031089A 2003-02-07 2003-02-07 Motor vibration detector Expired - Fee Related JP3888311B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003031089A JP3888311B2 (en) 2003-02-07 2003-02-07 Motor vibration detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003031089A JP3888311B2 (en) 2003-02-07 2003-02-07 Motor vibration detector

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JP2004242469A JP2004242469A (en) 2004-08-26
JP3888311B2 true JP3888311B2 (en) 2007-02-28

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Country Status (1)

Country Link
JP (1) JP3888311B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107210692B (en) * 2015-02-10 2020-04-07 皮尔伯格泵技术有限责任公司 Electric vehicle auxiliary unit and method for reversing vehicle auxiliary unit
CN114859225B (en) * 2022-07-07 2022-09-09 西北工业大学 Performance testing device for motor equipment

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