varistor

简明释义

英[vəˈrɪstə(r)]美[vəˈrɪstər]

n. [电子] 压敏电阻；变阻器

英英释义

单词用法

同义词

反义词

例句

1.Applying QSPM matrix analysis, to get the strategy of "Peel off low voltage and semi-conductor ceramic capacitor, develop new type varistor and new type military components".

运用QSPM矩阵分析，得出“剥离低压、半导体瓷介电容器，开发压敏电阻和新型军用元器件产品”的战略。

2.An approach is made on grinding process for varistor and a new dual surface grinding process with through feeding and continuous grinding is proposed.

对压敏电阻的磨片工艺进行了探讨，并提出了一种新的磨片工艺：双端面研磨，采用贯穿送料和连续磨削的方法。

3.As seen from convenient microstructure of varistor with high gradient and discharge capacity the essential way to enhance electric gradient is crystal miniaturization.

从传统电位梯度和高梯度电阻片显微结构分析中得出，晶粒细小化是提高电位梯度的重要途径。

4.Analyzed were the characteristics of interface of both ZnO varistor and pure ZnO ceramic by X-ray photoelectron spectroscopy (XPS).

采用X射线光电子能谱(XPS)对比分析纯氧化锌陶瓷和氧化锌压敏电阻的界面特性。

5.The ZnO films are often doped to expand the use of zinc oxide, for example in the LED, UV detectors, surface acoustic wave devices, varistor devices and so on.

人们往往通过掺杂来提高氧化锌在发光管、紫外光探测器、表面声波器件、压敏电阻器件等方面的应用。

6.A surge protector or simple capacitor or varistor can protect against most overvoltage conditions, while a lightning arrestor protects against severe spikes.

电涌保护器或简单的电容或压敏电阻可以防止大多数过压情况的出现，而避雷器则保护严重尖峰的尖峰电流。

7.In order to suppress surges reliably and meet the requirements for EMC of the electronic devices, the metal-oxide varistor and electromagnetic interference filter are combined to suppress surge.

为了进行可靠的浪涌保护以及满足电磁兼容的要求，将压敏电阻与电磁干扰滤波器结合起来进行浪涌抑制。

8.The circuit board includes a varistor to protect against voltage spikes.

电路板包括一个压敏电阻以防止电压尖峰。

9.When the voltage exceeds a certain level, the varistor will clamp it down.

当电压超过某个水平时，压敏电阻会将其限制在一定范围内。

10.We replaced the damaged varistor to restore functionality to the device.

我们更换了损坏的压敏电阻以恢复设备的功能。

11.In power supply circuits, a varistor is crucial for surge protection.

在电源电路中，压敏电阻对防浪涌至关重要。

12.The varistor helps prevent damage from lightning strikes.

该压敏电阻有助于防止雷击造成的损害。

作文

In the world of electronics, components play a crucial role in ensuring the safety and efficiency of devices. One such component that is often overlooked is the varistor. A varistor (压敏电阻) is a voltage-dependent resistor that is used to protect circuits from excessive voltage transients. These transients can occur due to various reasons, including lightning strikes, power surges, or even the switching of electrical appliances. Understanding the function and importance of a varistor is essential for anyone involved in electronic design or maintenance.The basic principle behind a varistor is its ability to change resistance based on the voltage applied across it. At normal operating voltages, a varistor behaves like an insulator, allowing minimal current to pass through. However, when the voltage exceeds a certain threshold, the resistance drops significantly, allowing the varistor to conduct electricity and divert the excess current away from sensitive components in the circuit. This protective mechanism helps prevent damage to devices, ensuring their longevity and reliability.There are several types of varistors, with metal oxide varistors (MOVs) being the most common. MOVs are made from zinc oxide and are widely used in various applications, including surge protectors, power strips, and electronic devices. The effectiveness of a varistor is often measured by its clamping voltage and energy absorption capacity. Clamping voltage refers to the maximum voltage that the varistor will allow before it begins to conduct, while energy absorption capacity indicates how much energy the varistor can handle during a transient event.When designing a circuit, it is crucial to select the appropriate varistor for the application. Factors such as the expected voltage levels, environmental conditions, and the specific characteristics of the circuit must be considered. An incorrectly chosen varistor can lead to inadequate protection, resulting in potential damage to the equipment. Therefore, engineers must carefully analyze the requirements and select a varistor that meets those needs.In addition to their protective capabilities, varistors also have some limitations. For instance, repeated exposure to high voltage transients can degrade the material properties of a varistor, leading to reduced performance over time. This phenomenon is known as aging, and it is important for users to monitor the condition of varistors in their circuits. Regular inspections and testing can help identify any signs of wear or failure, allowing for timely replacements and maintaining the integrity of the system.In conclusion, the varistor (压敏电阻) is a vital component in protecting electronic circuits from voltage transients. Its ability to adapt resistance based on the voltage applied makes it an effective safeguard against potential damage. Understanding the functionality, selection criteria, and limitations of varistors is essential for anyone working with electronic devices. By incorporating varistors into designs, engineers can enhance the reliability and lifespan of their products, ultimately contributing to a safer and more efficient electronic landscape.