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The current that various terminal blocks can withstand during use!

The terminal blocks may not reach the required power level due to the different components selected, or the specifications of the selected components may far exceed the design requirements. The current that terminal blocks can withstand is related to these factors. In Europe, the current rating of components is determined by monitoring the temperature of the metal conductor as the current increases. When the temperature of the metal pin exceeds the ambient temperature by 45°C, the measured current at that time is taken as the rated current value (or maximum current value) of the component. Another specification of the IEC is the allowable current value, which is 80% of the maximum current. In contrast, the UL standard considers 90% of the current value when the temperature of the metal conductor exceeds the ambient temperature by 30°C as the nominal current value of the component. It is evident that the temperature of the metal conductor is a very important factor in all applications, and it is even more critical for industrial equipment. This is because industrial equipment often needs to operate in environments with temperatures up to 80°C. If the temperature of the terminal block exceeds this temperature by another 30°C to 45°C, then the temperature of the terminal block will exceed 100°C. Depending on the type of nominal value and insulation material used for the selected components, terminal block products must operate at currents below the rated value to ensure they can reliably function within the desired temperature range. Sometimes, materials suitable for compact packaged components may not adequately meet the heat dissipation requirements, so the current for such terminal block components must be significantly lower than the rated value during use.

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2023-08

The difference between low voltage connectors and high voltage connectors.

The difference between low-voltage connectors and high-voltage connectors According to the different transmission media, automotive connectors can be divided into high-speed connectors for transmitting and exchanging data signals and electrical connectors for transmitting and exchanging current. Based on the working voltage, electrical connectors can be classified into low-voltage connectors and high-voltage connectors. 1. Low-voltage connectors are typically used in BMS, air conditioning systems, lighting, etc. The working voltage of traditional fuel vehicles is generally around 14V. 2. High-voltage connectors are widely used in new energy vehicles. Typically, depending on different scenarios, they provide transmission at voltage levels ranging from 60V to 380V or even higher, as well as current levels from 10A to 300A or more. High-voltage connectors are mainly applied in the battery, PDU (high-voltage distribution box), OBC (on-board charger), DC/DC converters, air conditioning, PTC heating, and DC/AC charging interfaces of new energy vehicles. High-speed connectors are divided into FAKRA RF connectors, Mini-FAKRA connectors, HSD (High-Speed Data) connectors, and Ethernet connectors, primarily used in cameras, sensors, broadcast antennas, GPS, Bluetooth, WiFi, keyless entry, infotainment systems, navigation, and driver assistance systems. High-voltage connectors are related to electrification, while high-speed connectors are related to intelligent connectivity. a. Unlike traditional fuel vehicles, the core components of new energy vehicles are the battery, motor, and electronic control system. Since new energy vehicles use electric drive motors, high-power high-voltage connectors are required to achieve greater torque and power, with corresponding high voltage and current levels that far exceed the 14V voltage of traditional fuel vehicles. b. With the advent of the Internet of Vehicles and the popularity of intelligent driving, there is a need to collect and process more data at a faster speed. This includes sensors such as cameras, radars, and LiDAR inside and outside the vehicle, as well as vehicle-to-vehicle (V2V), vehicle-to-network (V2N), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P), vehicle-to-utility (V2U), and vehicle-to-everything (V2X) wireless communication that generates, sends, receives, stores, and processes massive amounts of data.

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2023-08

What are the processing methods for connector pins?

The structure of the connector pins is designed based on the assumption that the connector is in a stationary or low-speed environment. Therefore, the position of the connector pins remains fixed during connection. However, the operating speed of high-speed trains or subways is very high, resulting in significant vibrations. The original connector pin structure, designed for stationary or low-speed environments, cannot adapt to this high-speed environment. When high-speed trains or subways operate, radial and axial displacement deviations occur at the connection points of the connectors, which can easily lead to poor contact. The connector pins include: 1. The outer part of the dynamic contact housing has no grooves, and a sealing ring is assembled in the groove. This design allows the dynamic contact part to be well positioned at the required installation location. The top of the dynamic contact is spherical, ensuring good contact even when there is non-coaxial contact with the static contact part. 2. The top of the static contact has a mesh structure, which increases the surface roughness of the static contact, thereby increasing the friction at the contact surface and making the connection between the two parts more stable. 3. The connection card is realized through the positioning part of the contact pin, which integrates the limiting device of the connection card with the contact pin, making the limitation more reliable and the installation more convenient. 4. The spring is in a compressed state when the dynamic and static contact parts are not in contact. This design provides reliable clamping force for the dynamic contact, eliminating gaps, so that as long as the dynamic contact part touches the static contact part, electrical conductivity and signal transmission can be achieved. This design adapts to high-speed operation and vibration conditions, and the connector has multi-position adaptation settings, maintaining stable contact at different positions.

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2023-08

Common Types of Connectors

Connectors are the bridges for transmitting signals and conducting current in electronic devices, and they can be divided into many types. Depending on the application environment, frequency, and objects, the choice of connectors varies. Common connectors include BTB connectors, FPC connectors, FFC connectors, RF connectors, etc. 1. BTB Connectors. BTB connectors are currently the strongest in terms of transmission capability among all types of connector products. They can be used to connect PCB boards, achieving both mechanical and electrical connections. They are mainly applied in various fields such as networking, communications, power, medical, industrial, finance, and office. BTB connectors typically use a narrow strip contact method and are characterized by pairing male and female sockets. They have three main basic performances: electrical performance, mechanical performance, and environmental performance. With the development of BTB connectors, the current market trend is towards lightweight, thin, small pitch, and high performance. 2. FPC Connectors. FPC connectors, also known as flexible printed circuit boards, are made from foldable and bendable materials, used for connecting displays to driver circuits. They play an important role in various fields such as portable electronic products, communication electronic products, LCD screens, and measuring instruments. 3. The micro, compact, and high-density characteristics of FPC connectors can effectively save space, simplify wiring procedures, and reduce labor costs. They have the advantage of being foldable, making them lightweight and flexible in application.

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Jiangsu Mingke Photoelectric Technology Co.,Ltd.

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