JPH0131539Y2 - - Google Patents
Info
- Publication number
- JPH0131539Y2 JPH0131539Y2 JP1980179412U JP17941280U JPH0131539Y2 JP H0131539 Y2 JPH0131539 Y2 JP H0131539Y2 JP 1980179412 U JP1980179412 U JP 1980179412U JP 17941280 U JP17941280 U JP 17941280U JP H0131539 Y2 JPH0131539 Y2 JP H0131539Y2
- Authority
- JP
- Japan
- Prior art keywords
- motor
- blower motor
- vehicle
- cargo handling
- switch
- 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
Links
- 230000007935 neutral effect Effects 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 12
- 230000009467 reduction Effects 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Description
【考案の詳細な説明】
本考案は、バツテリー式荷役車輌の改良に係
り、荷役車輌の走行用モータの非通電時に、これ
と同期してブロアモータの回転数を低下させ、車
輌停止時の発生騒音を少くする様にした荷役車輌
の低騒音化装置に関する。[Detailed description of the invention] The present invention relates to an improvement of a battery-type cargo handling vehicle. When the traveling motor of the cargo handling vehicle is de-energized, the rotation speed of the blower motor is reduced in synchronization with this, thereby reducing the noise generated when the vehicle is stopped. This invention relates to a noise reduction device for a cargo handling vehicle that reduces noise.
一般に、加速及び停止が頻繁に繰返され、且つ
低速走行を主体とする荷役用車輌等に於いては、
走行用電動機に冷却フアンを直結する所謂自己冷
却方式ではフアンの平均回転数が著しく低いた
め、所望の冷却効果を挙げ難いという難点があ
る。 In general, for cargo handling vehicles that frequently accelerate and stop and mainly drive at low speeds,
In a so-called self-cooling system in which a cooling fan is directly connected to a running electric motor, the average rotational speed of the fan is extremely low, making it difficult to achieve the desired cooling effect.
これ等の問題を解決するために、バツテリー式
荷役車輌に於いては冷却用のブロアーモータを別
途に設け、これを走行用電動機の回転数とは無関
係に一定速度で回転させることにより冷却性能を
高め、モータ出力の増加を図る方策が広く採用さ
れている。 In order to solve these problems, battery-type cargo handling vehicles are equipped with a separate blower motor for cooling, and this is rotated at a constant speed regardless of the rotational speed of the electric motor for driving, thereby improving cooling performance. Measures to increase the motor output by increasing the motor output are widely adopted.
而して、従来のバツテリー式荷役車輌に於いて
は、電源の関係からブロアモータには直流電動機
が多く利用されている。然し乍ら、直流電動機は
保守点検を定期的且つ厳格に行なわねばならず、
これを怠ると整流子のフラツシユオーバ等による
故障を引き起し易いという大きな欠点が内在す
る。又、従来のブロアーモータの回転速度は1800
〜2000RPM程度であり、然かも車輌の停止時に
於いても高速度回転をするために、極めて高い騒
音を発するという欠点がある。 Therefore, in conventional battery type cargo handling vehicles, DC motors are often used as blower motors due to power supply issues. However, DC motors must be regularly and strictly inspected.
If this is not done, there is a major drawback in that failures due to commutator flashover etc. are likely to occur. Also, the rotation speed of the conventional blower motor is 1800
The rotation speed is approximately 2000 RPM, and since it rotates at a high speed even when the vehicle is stopped, it has the disadvantage of producing extremely high noise.
本考案は、この種バツテリー式荷役車輌のブロ
アーモータに係る上述の如き欠点の除却を課題と
するものであり、冷却用ブロアーモータに三相誘
導電動機を使用し、且つ周波数可変型コンバータ
を使用して直流を三相交流に変換すると共に、車
輌に従前から装備されているところの、前後進切
替スイツチと連動しその中立位置にて接点を閉路
する型式のニユートラルスイツチを利用して前記
周波可変型コンバータへ周波数制御用信号を与
え、走行用モータの非通電時には電源周波数を制
御してその回転数を低下させ、これによりブロア
ーモータの車輌停止時の騒音低下を図るようにし
た装置の提供を目的とするものである。 The present invention aims to eliminate the above-mentioned drawbacks of the blower motor of this type of battery-operated cargo handling vehicle, and uses a three-phase induction motor as the cooling blower motor and a variable frequency converter. In addition to converting direct current into three-phase alternating current, the frequency can be varied using a type of neutral switch that works in conjunction with the forward/reverse selector switch that has been installed on the vehicle and closes the contact at its neutral position. To provide a device that applies a frequency control signal to a type converter, controls the power supply frequency and lowers the rotation speed when the drive motor is not energized, and thereby reduces the noise of the blower motor when the vehicle is stopped. This is the purpose.
以下、第１図乃至第３図に示す本考案の一実施
例に基づいてその詳細を説明する。尚、本考案は
実施例の構成のみに限定されるものではなく、そ
の要旨を逸脱しない範囲に於いて適宜に構造の変
更を為し得るものである。 Hereinafter, details will be explained based on an embodiment of the present invention shown in FIGS. 1 to 3. It should be noted that the present invention is not limited to the configurations of the embodiments, but may be modified as appropriate within the scope of the invention.
第１図は、本考案に係る低騒音化装置のブロツ
クダイヤグラムであり、図に於いて、１は車輌に
積載したバツテリー、２は周波数可変型コンバー
タ、２ａは周波数制御用信号の入力端子、３は三
相誘導型のブロアーモータ、４は冷却フアン、５
は走行用電動機である。 FIG. 1 is a block diagram of a noise reduction device according to the present invention. In the figure, 1 is a battery mounted on a vehicle, 2 is a variable frequency converter, 2a is an input terminal for a frequency control signal, and 3 is a block diagram of a noise reduction device according to the present invention. is a three-phase induction blower motor, 4 is a cooling fan, and 5 is a three-phase induction blower motor.
is the electric motor for driving.
又、６は前後進切替スイツチであり、車輌の運
転席に設けた操作レバー（図示省略）によつてそ
の切替開閉が行なわれるようになつている。即
ち、操作用レバーを前進位置に置けば、接点６ａ
と６ｂが接続されて前進用制御リレー７が作動
し、逆に操作レバーを後退位置へ置けば、接点６
ａと６ｃが接続されて後退用制御リレー８が作動
する。又、操作レバーを中立の位置に置けば、接
点６ａと６ｂ及び接点６ａと６ｃは何れも開路の
状態となる。 Reference numeral 6 denotes a forward/reverse switching switch, which is opened and closed by an operating lever (not shown) provided on the driver's seat of the vehicle. That is, if the operating lever is placed in the forward position, the contact 6a
and 6b are connected, the forward control relay 7 is activated, and conversely, when the operating lever is placed in the backward position, contact 6
a and 6c are connected, and the reverse control relay 8 is activated. Further, when the operating lever is placed in the neutral position, the contacts 6a and 6b and the contacts 6a and 6c are both in an open state.
９は、前記前後進切替スイツチ６と連動するニ
ユートラルスイツチであり、操作レバーが中立位
置に来て切替スイツチ６の接点６ａが開放される
と、接点９ａ，９ｂ間が閉路する様に構成されて
いる。尚、当該ニユートラルスイツチ９は、前述
の如く操作レバーが中立位置の時に接点を構成
し、走行用電動機５の速度制御器１０の作動を停
止させる機能を果すものであり、前記前後進切替
スイツチ６やニユートラルスイツチ９の構成は、
何れも従前のこの種バツテリー式荷役車輌に於い
て公知のものである。 Reference numeral 9 denotes a neutral switch that is interlocked with the forward/reverse changeover switch 6, and is constructed so that when the operating lever comes to the neutral position and the contact 6a of the changeover switch 6 is opened, the circuit between the contacts 9a and 9b is closed. ing. The neutral switch 9 constitutes a contact point when the operation lever is in the neutral position as described above, and functions to stop the operation of the speed controller 10 of the electric motor 5 for traveling, and the neutral switch 9 serves as a contact point when the operating lever is in the neutral position, and has the function of stopping the operation of the speed controller 10 of the electric motor 5 for traveling. 6 and the configuration of the neutral switch 9 are as follows:
All of these are conventionally known in this type of battery type cargo handling vehicle.
１１は、前記ニユートラルスイツチ９とコンバ
ータ２の周波数制御用入力端子２ａ間を連結する
制御用信号Ｓの入力回路であり、操作レバーが中
立位置に置かれた時に、ニユートラルスイツチ９
を介して周波数制御用信号Ｓが信号発生器１２か
らコンバータ２へ印加されるようになつている。
尚、コンバータ２に於ける周波数制御機構は既に
公知の技術であり、ここではその説明を省略す
る。 11 is an input circuit for a control signal S that connects the neutral switch 9 and the frequency control input terminal 2a of the converter 2, and when the operating lever is placed in the neutral position, the neutral switch 9
A frequency control signal S is applied from the signal generator 12 to the converter 2 via.
Incidentally, the frequency control mechanism in the converter 2 is already a well-known technique, and its explanation will be omitted here.
次に、本考案に係る低騒音化装置の作動につい
て説明する。 Next, the operation of the noise reduction device according to the present invention will be explained.
第２図は、ブロアーモータ３が、冷却フアン４
の負荷特性Ａに対して十分なるトルクを有する場
合を示すものであり、この場合には、電源周波数
H2をH1まで低下する様に制御する。即ち、周波
数H2に於けるブロアーモータ３のトルク−速度
特性曲線イを、周波数H1に於けるトルク−速度
特性曲線ロに変更する。これにより、ブロアーモ
ータ３の回転数はN2からN1に低下する。 In FIG. 2, the blower motor 3 is connected to the cooling fan 4.
This shows the case where the torque is sufficient for the load characteristic A of the power supply frequency.
Control so that H 2 is reduced to H 1 . That is, the torque-speed characteristic curve A of the blower motor 3 at the frequency H2 is changed to the torque-speed characteristic curve B at the frequency H1 . As a result, the rotational speed of the blower motor 3 decreases from N2 to N1 .
又、第３図に示す如く、ブロアーモータ３のト
ルクが比較的少さくて、冷却用フアン４の負荷特
性A′に対して十分なるトルクを有しない場合に
は、電源周波数をH1からH2まで上昇する様に制
御する。即ち、周波数H1に於けるトルク−速度
特性曲線ハを、周波数H2に於ける特性曲線ロへ
移行させることにより、ブロアーモータ３の回転
数はN3からN4へ低下する。 Further, as shown in FIG. 3, if the torque of the blower motor 3 is relatively small and does not have sufficient torque for the load characteristic A' of the cooling fan 4, the power supply frequency may be changed from H1 to H. Control so that it rises to 2 . That is, by shifting the torque-speed characteristic curve C at the frequency H1 to the characteristic curve B at the frequency H2 , the rotation speed of the blower motor 3 decreases from N3 to N4 .
通常、前記ブロアーモータ３は1800〜
2000RPMで回転されており、この回転数を1/2〜
１／３まで低下させるようにする。これにより、車
輌の停止時、即ち走行用モータ５の非通電時に於
ける騒音は略1/4〜1/3に低下し、且つ走行用モー
タ５に要する冷却は十分に確保可能である。 Usually, the blower motor 3 has a power of 1800~
It rotates at 2000 RPM, and this rotation speed is 1/2 ~
Try to reduce it to 1/3. As a result, the noise when the vehicle is stopped, that is, when the traveling motor 5 is not energized, is reduced to about 1/4 to 1/3, and the cooling required for the traveling motor 5 can be sufficiently ensured.
本考案は、上述の如き構成であるから、下記の
如く多くの秀れた効用を有している。 Since the present invention has the above-described configuration, it has many excellent effects as described below.
(1) バツテリー式荷役車輌に装備されているニユ
ートラルスイツチ９を有機的に活用し、走行用
電動機５への通電の遮断と連動してブロアーモ
ータを減速するようにしているため、頻雑な操
作や特別を装備を必要とすることなく、車輌の
停止時に於けるブロアーモータの騒音を低下す
ることが出来る。(1) The neutral switch 9 installed in the battery type cargo handling vehicle is organically utilized to decelerate the blower motor in conjunction with cutting off the power to the traveling electric motor 5. The noise of the blower motor when the vehicle is stopped can be reduced without requiring any operation or special equipment.
(2) 周波数可変型コンバータを用いてブロアーモ
ータを三相誘導電動機としているため、従前の
直流電動機を使用する場合に比較して、ブロア
ーモータの保守点検に要する手数が極く少くな
り、且つ故障等の発生頻度も著しく低下する。
その結果、周波数可変型コンバータに要する費
用を遥かに越えるメリツトを得ることが出来
る。(2) Since the blower motor is a three-phase induction motor using a variable frequency converter, compared to the case of using a conventional DC motor, the amount of effort required for maintenance and inspection of the blower motor is minimized, and there is no risk of failure. The frequency of such occurrences also decreases significantly.
As a result, benefits that far exceed the costs required for variable frequency converters can be obtained.
本考案は上述の通り秀れた実用的効用を有する
ものである。 As mentioned above, the present invention has excellent practical utility.
第１図は、本考案に係る低騒音化装置のブロツ
クダイヤグラムである。第２図及び第３図は、ブ
ロワモータの速度制御を示す説明図である。
Ｓ……周波数制御用信号、１……バツテリー、
２……周波数可変型コンバータ、３……ブロアー
モータ、４……冷却用フアン、５……走行用電動
機、６……前後進切替スイツチ、７……前進用制
御リレー、８……後退用制御リレー、９……ニユ
ートラルスイツチ、１０……走行モータ用速度制
御器、１１……制御用信号入力回路、１２……制
御用信号発生器。
FIG. 1 is a block diagram of a noise reduction device according to the present invention. FIGS. 2 and 3 are explanatory diagrams showing speed control of the blower motor. S... Frequency control signal, 1... Battery,
2... Frequency variable converter, 3... Blower motor, 4... Cooling fan, 5... Travel electric motor, 6... Forward/forward selection switch, 7... Forward control relay, 8... Reverse control Relay, 9...neutral switch, 10...travel motor speed controller, 11...control signal input circuit, 12...control signal generator.
Claims (1)
５の冷却用ブロアーモータ３を三相誘導電動機と
すると共に、周波数可変型コンバータ２の周波数
制御用入力端子２ａへ、車輌の前後進切替スイツ
チ６と連動して該前後進切替スイツチ６の中立位
置にて閉路となるニユートラルスイツチ９を介し
て制御用信号Ｓを印加し、走行用電動機５の非通
電時に前記ブロアーモータ３を減速するよう構成
したバツテリー式荷役車輌の低騒音化装置。 In a battery type cargo handling vehicle, the cooling blower motor 3 of the traveling electric motor 5 is a three-phase induction motor, and the frequency control input terminal 2a of the variable frequency converter 2 is connected to the forward/reverse switching switch 6 of the vehicle. A control signal S is applied via a neutral switch 9 which is closed when the forward/reverse selector switch 6 is in a neutral position, and the battery is configured to decelerate the blower motor 3 when the electric motor 5 for driving is de-energized. Noise reduction device for cargo handling vehicles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980179412U JPH0131539Y2 (en) | 1980-12-12 | 1980-12-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980179412U JPH0131539Y2 (en) | 1980-12-12 | 1980-12-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57100519U JPS57100519U (en) | 1982-06-21 |
| JPH0131539Y2 true JPH0131539Y2 (en) | 1989-09-27 |
Family
ID=29975084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980179412U Expired JPH0131539Y2 (en) | 1980-12-12 | 1980-12-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0131539Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3104498B1 (en) * | 2019-12-11 | 2021-11-12 | Valeo Systemes Thermiques | Propulsion system for electric motor vehicle. |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5181321A (en) * | 1975-01-16 | 1976-07-16 | Hitachi Ltd | |
| JPS5545633B2 (en) * | 1973-09-08 | 1980-11-19 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5823711Y2 (en) * | 1978-09-18 | 1983-05-20 | トヨタ自動車株式会社 | alternator system |
-
1980
- 1980-12-12 JP JP1980179412U patent/JPH0131539Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5545633B2 (en) * | 1973-09-08 | 1980-11-19 | ||
| JPS5181321A (en) * | 1975-01-16 | 1976-07-16 | Hitachi Ltd |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57100519U (en) | 1982-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4081889B2 (en) | High-voltage harness wiring structure for electric vehicles | |
| JP2942533B2 (en) | Drives for motor vehicles | |
| JP2961920B2 (en) | Series, parallel combined hybrid car system | |
| JPH08126115A (en) | Power generation controller of hybrid electric automobile | |
| KR20180132504A (en) | Driving apparatus for electric vehicle | |
| KR100255463B1 (en) | Emergency driving unit for an elevator machinery | |
| JPH0131539Y2 (en) | ||
| JP3077434B2 (en) | Electric vehicle control device | |
| JPH11122712A (en) | Controller for hybrid car | |
| JP3253342B2 (en) | Electric vehicle drive system | |
| US7066854B2 (en) | Hybrid electric vehicle | |
| JPH08298748A (en) | Motor apparatus | |
| JP4534114B2 (en) | Rotating electrical machine for vehicle | |
| JP2010154607A (en) | Method of controlling emergency brake in electric motor car | |
| CN216659555U (en) | Double-motor power system of commercial vehicle | |
| JP7333201B2 (en) | vehicle controller | |
| JP2019115216A (en) | Driving system for railroad vehicle | |
| Qiang et al. | A novel drive strategy for hybrid electric vehicles | |
| JPS6188401U (en) | ||
| US2581152A (en) | Automotive drive | |
| WO2023286122A1 (en) | Propulsion control device and filter capacitor voltage control method | |
| JPS623642B2 (en) | ||
| KR20230150507A (en) | Hybrid electric vehicle and method of motor driving control for the same | |
| JP2001080375A (en) | Automobile driving system | |
| KR20230132028A (en) | Hybrid electric vehicle and motor driving apparatus for the same |