Unionwell производитель микропереключателей 5 Unionwell производитель микропереключателей
Since the microswitch’s introduction in the 1930s, small electromechanical microswitches, such as micro switches, have evolved to meet various application requirements, включая аэрокосмическую, бытовая техника, boiler controls, медицинское оборудование, and sprinkler systems, испытательное оборудование, таймеры, and vending machines. People use micro switches to detect temperature, позиция, and liquid level.
Precision micro switches generally have three primary types, operating handle, and shell-type specifications. Some microswitches use a push and spring design. Whether factory engineers are looking for a thermostat for residential heating or industrial boiler control, or a level switch for a large oil tank, there are five key characteristics to consider:
- Dimensions
- Electrical requirements (напряжение / ток)
- Надежность (механическая / электрическая жизнь)
- Environmental factors (опасные среды, температурные диапазоны)
- Agency approvals
Here are five key steps to help you choose the suitable microswitch for your specific application
Клавиатурные переключатели с микропереключателями 1 Understand how switching form factors affect other characteristics.
Switches size matters when choosing a micro switch. Switch size is directly related to its current range, travel, и рабочая сила. Например, one of the smallest microswitches on the market today measures 0.50″ x 0.236″ x 0.197″ (ДхШхВ). While this tiny switch is suitable for detecting circuit conditions in compact circuit breakers, it typically only interrupts 0.1 к 3 усилители (А) and has a short stroke.
Applications that require higher currents require larger switches. Например, the micro switch that detects the liquid level in a fuel tank application must provide a large stroke and withstand a large current. Герметичный мини-микропереключатель G9 имеет небольшие компактные размеры., the switch drives the pump in level switch applications and carries a large current. This working environment requires a large microswitch rated at 20A or 25A at 125VAC or 250VAC.
Кончик: Чем меньше размер переключателя, the smaller the travel and the interrupted current. Кроме того, the external size of the switch also affects the operating force. Ideally, engineers need a switch with a low operating force and high current capacity. Но на самом деле, a compromise is required between these two parameters.
Microswitches maintain good contact while providing an extensive current-carrying range. The micro switch requires a stronger spring, increasing the switch’s operating force and size. Рабочие силы могут варьироваться от 2 grams in pressurized air-type applications to 8 ounces in solenoid valve applications (where higher operating forces are required). One of the most significant switches on the market measures 1.94″x0.69″x1.3″ (ДхШхВ).
Engineers should also pay attention to the differential travel of the switch—the distance between the switch’s tripped position and its reset position. Its threshold will vary according to different applications. Например, в приложениях с переключателем температуры, точки включения/выключения должны быть как можно ближе друг к другу, и дифференциальный ход должен быть таким низким, как 0.0001 дюймы. тем не мение, applying a liquid level pump may cause the make-up pump to start and stop too frequently, shortening the pump’s service life if the differential stroke is too close.
Клавиатурные переключатели с микропереключателями 2 Знайте свои электрические требования.
Microswitches are typically capable of breaking 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 types for various applications. Engineers must know the current and voltage ratings (переменного или постоянного тока) required to select the appropriate switch for a specific application.
As all kinds of devices in all industries strive for low energy consumption, microswitches must operate at low currents (нагрузки логического уровня) and DC voltage. тем не мение, some applications require switches that break high currents and voltages, such as industrial-grade pump applications. В дополнение к требованиям к нагрузке, engineers must also select the appropriate circuit.
The switch contacts must be normally open (НЕТ) и нормально закрытый (Северная Каролина). For NO type contacts, usually, no current flows between the contacts. The contacts are closed when the switch is actuated and connected. Для размыкающих контактов, there is usually a current flow between the contacts. The contacts are opened when the switch is actuated, and the circuit is disconnected.
Клавиатурные переключатели с микропереключателями 3 Учитывайте условия окружающей среды.
Environmental requirements greatly influence the selection of microswitches, especially in applications requiring high reliability and criticality, такие как промышленный контроль и медицинское оборудование. Understand the environmental conditions of the application, including contaminants in the air that may enter the switch, жидкость, в которой находится переключатель, и требования к рабочей температуре.
You must choose a sealed switch with a wide operating temperature range for applications in harsh environmental conditions. Highly reliable microswitches can operate from -65 градусов по Фаренгейту (-54 градусов Цельсия) к 350 градусов по Фаренгейту (177 градусов Цельсия) for various applications. В то же время, You must note that the degree of protection of the switch should be at least IP67 to prevent liquid intrusion. The switches’ function eliminates the need to spend a lot of time designing an enclosure that achieves the same degree of protection.
Клавиатурные переключатели с микропереключателями 4 Clarify working life requirements.
Switch reliability is critical.
It would be best to determine how much electrical and mechanical operating life an application needs.
Разные переключатели имеют разные материалы контактов, housings, and terminals to meet different applications’ electrical and mechanical life requirements.
A highly reliable microswitch can operate 10 от миллиона до 20 миллион раз до механического отказа и 50,000 к 100,000 раз при максимальной нагрузке до электрического сбоя. Что касается небольшой разницы в цене между переключателями разного качества., необходимо учитывать общую стоимость использования. Because you’re not only paying for the switch, you’re also paying for the long-term, trouble-free operation of the switch. In many cases, the additional cost of using a more reliable switch is offset by a lower warranty cost during use.
Клавиатурные переключатели с микропереключателями 5 Check Agency Accreditation Requirements
Choosing switches, which meet various international electrical requirements, can help you simplify product design for different regions. Major standard certifications include UL certification in the United States, CUL certification or CSA certification in Canada, Сертификация ENEC в Европе, and CQC certification in China.
When choosing a snap action micro switch, you need to consider multiple factors, например, форм-фактор, требования к нагрузке, operating environment, и надежность, so it is essential to understand the actual application requirements:
- What size switch is required?
- What is the required power rating?
- Is it a low voltage application?
- Нужно ли герметизировать переключатель?
- Должен ли коммутатор выдерживать экстремальные температуры?
- Does it need international certification?
Why Choose Unionwell Micro Switch China Manufacturer?
Unionwell’s micro switch product series has basic microswitch, водонепроницаемые выключатели, поворотные переключатели, кулисные переключатели, так далее.
Микропереключатели имеют UL, ENEC, CQC, и другие сертификаты. Фабрика прошла ISO9001, IATF16949, и система качества ISO14001 гарантирует.
Список сверхминиатюрных герметичных микропереключателей серии Unionwell G3 >>
Our micro switches are widely used in home appliances, электронное оборудование, автоматы, оборудование связи, автомобильный электрон, аппарат и инструмент, электрический инструмент движения, так далее. Для большего количества микропереключателей, пожалуйста, посетите наш официальный сайт:
https://www.unionwellswitch.com/
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