Professional Knowledge

Identify performance via the parameters: how to effectively identify the meaning of Ui and Ue of high voltage DC contactor

2026-08-11

Identify performance via the parameters: how to effectively identify the meaning of Ui and Ue of high voltage DC contactor

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Pre-charging Circuit and Pre-charging Resistor Selection

2026-07-24

Power resistors are used to withstand and consume large amounts of power, and they are made of materials with high thermal conductivity for efficient cooling. They are usually designed to be coupled to a heat sink in order to be able to consume a large amount of power. For precharged resistors, common types are the two in the figure below, both common metal aluminum shell resistors; These two resistors belong to the wire-wound resistors in power resistors.

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Introduction to three Coil Control Methods of DC Contactors

2026-07-24

Introduction to tho three types based on their coil control methods: single-coil control, dual-coil control, and energy-saving board control (i.e., PWM control board + single-coil control). This article compares the structure, working principle, and energy consumption characteristics of DC contactors with single-coil, dual-coil, and PWM control methods, and analyzes their advantages, disadvantages, and applicability.

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