マイクロ スイッチの選択には 5 つの重要なステップが必要です

1930年代の登場以来, マイクロスイッチは、さまざまなアプリケーション要件を満たすために継続的に開発されてきました, 航空宇宙を含む, 家庭用器具, ボイラー制御, マイクロスイッチの選択には5つの重要なステップが必要です, スプレーシステム, マイクロスイッチの選択には5つの重要なステップが必要です, timers and vending machines. Micros witches are typically used to detect temperature, position and liquid level.

Precision micro switches are usually available in three sizes: basic, with the operating lever, operating lever and housing. The micro switch adopts a plunger and spring design.

 

Whether engineers are looking for thermostats for residential heating or industrial boiler control, or level switches for large oil tanks, they need to consider five key characteristics: switch form factor, electrical requirements (マイクロスイッチの選択には5つの重要なステップが必要です), 信頼性 (マイクロスイッチの選択には5つの重要なステップが必要です), environmental factors (マイクロスイッチの選択には5つの重要なステップが必要です, マイクロスイッチの選択には5つの重要なステップが必要です), and agency approvals. Here are 5 key steps to help you choose the right micro switch for your application.

 

ステップ 1: Understand how the form factor of the switch affects other characteristics

Size is important when choosing a micro switch. The size of the switch is directly related to its characteristics, 現在の範囲を含む, operating travel, と操作力. 例えば, one of the smallest micro switches on the market measures 0.50″ x 0.236″ x 0.197″ (LxWxH). Although this tiny switch is suitable for detecting circuit status in compact circuit breakers, it typically only breaks currents of 0.1 に 3 amperes (NS) and has a short travel.

Most Applications that require higher currents require larger switches. 例えば, micro switches for level detection in-tank applications must provide a long travel and withstand large currents. Typically in level switch applications, the switch drives the pump directly and carries a large current. It requires a large micro switch rated at 20A or 25A at 125VAC or 250VAC.

スイッチは、レベルスイッチアプリケーションでポンプを直接駆動し、大電流を流します: スイッチは、レベルスイッチアプリケーションでポンプを直接駆動し、大電流を流します, the smaller the travel and the current that can be broken.

Unionwellは、あらゆる種類の基本的なマイクロスイッチの製造を専門としています, the size of the switch also affects the operating force. Engineers need a switch with low operating forces and high current capability. スイッチは、レベルスイッチアプリケーションでポンプを直接駆動し、大電流を流します, there is a compromise between these two parameters. Micro switches require stronger springs to maintain good contact while providing a large current withstand range, which will increase the switch’s operating force and shape size. スイッチは、レベルスイッチアプリケーションでポンプを直接駆動し、大電流を流します 2 grams in pressurized pneumatic applications to 8 ounces in solenoid applications where a greater operating force is required. The largest switch on the market measures 1.94″ x 0.69″ x 1.3″ (LxWxH).

Engineers should also note the differential travel of the switch—the distance between the travel position of the switch and the reset position. The threshold varies depending on the application. 例えば, 温度スイッチアプリケーションで, オン/オフ動作点は可能な限り近くにする必要があります, 差動移動はできるだけ低くする必要があります 0.0001 インチ. でも, in level pump applications, the differential travel is too close to cause the make-up pump to start and stop too frequently, ポンプの耐用年数を短縮する.

Unionwell’s micro switches are available in various configurations to meet engineers’ specific needs.

 

ステップ 2: あなたの電気的要件を知っている

Micro switches typically break currents from 5mA/5VDC to 25A/250VAC. The micro switch product line offers a range of products from low energy consumption to power load electrical versions for various applications.

Engineers must know the rated current and voltage (ACまたはDC) required for a specific application to select the appropriate switch. Since a wide range of equipment in all industries strives for low energy consumption, micro switches must be able to operate at low currents (論理レベルの負荷) and DC voltages.

でも, some applications require switches that can break high currents and voltages, such as industrial pump applications.

負荷要件に加えて, engineers must select the right circuit. The switching contact must be one of the normally open (いいえ) 通常は閉じています (NC) types. For NO-type contacts, there is usually no current passing between the contacts. When the switch is actuated, the contacts close and the circuit is connected. NCタイプの接点用, there is usually a current flowing between the contacts. The contact opens, and the circuit is disconnected when the switch is actuated.

 

ステップ 3: 環境条件を考慮する

Environmental requirements greatly influence the choice of microswitches, especially in applications that require high reliability and criticality, 産業用制御および医療機器など. Understand your application’s environmental conditions, including contaminants that may enter the switch in the air, スイッチが配置されている液体, および動作温度の要件.

It would help if you sealed switches with a wide operating temperature range for applications under harsh environmental conditions. Highly reliable micro switches operate from -65 華氏度 (-54 摂氏) に 350 華氏度 (177 摂氏), making it easy to handle a wide range of applications. 同時に, it should also be noted that the protection level of the switch should be at least IP67 to prevent liquid ingress. It eliminates the need for a lot of time to design an enclosure that achieves the same degree of protection.

 

ステップ 4: Clarify the working service life requirements

The reliability of the switch is critical. How many electrical and mechanical operating cycles do you need for an application? 異なるスイッチは異なる接触材料を持っています, housings and terminals to meet different applications’ 電気的および機械的寿命要件.

A highly reliable micro switch can operate 10 百万から 20 機械的故障の前に百万回そして 50,000 に 100,000 電気的故障の前の最大負荷での時間.

異なる品質のスイッチ間のわずかな価格差については, 総使用コストを考慮する必要があります. Because you not only pay for the switch but also for ensuring that the switch runs trouble-free for a long time, in many cases, a lower warranty cost offsets the additional cost of using a more reliable switch during use.

 

ステップ 5: Check the agency certification requirements

Choosing switches that meet international electrical requirements can help simplify your product design for different areas. Some main standard certifications include UL certification in the United States, cUL certification or CSA certification in Canada, 異なる品質のスイッチ間のわずかな価格差については, CQC certification in China, and KC certification in South Korea.

When choosing a micro switch, you need to consider many factors, 異なる品質のスイッチ間のわずかな価格差については, 負荷要件, operating environment and reliability, so it is important to understand the actual application requirements: What size switch do you need? What is the power rating required? Is it a low-voltage application? 負荷要件? 負荷要件? Is certification from an international organization required? Is it a critical application? Once these issues are figured out, choosing the right switch for the application becomes easier.

 

Unionwell Micro Switch Manufacturer From China

プロのマイクロスイッチ中国メーカー & プロのマイクロスイッチ中国メーカー, Ltdは、自動車産業向けの高品質のマイクロスイッチと家電製品の白物家電を専門としています.

主な製品には、基本的なマイクロスイッチが含まれます, 防水スイッチ, 空気圧スイッチ, メカニカルキーボードスイッチ, とドアスイッチ.

ワンストップ体制を構築します, 製品開発をカバー, 精密成形, 射出成形, 精密スタンピング, 自動化装置R&NS, 組み立て, とテスト.

プロの営業チームが3D図面リクエストへの支援と迅速な対応を提供します, 価格見積もり, エンジニアが最終製品アプリケーションのスイッチをテストおよび認定できる適切なサンプル プログラムへのアクセス.