Encyclopedia of Home Appliances: A Comprehensive Guide from Purchase to Maintenance As an electrical engineer with 20 years of experience, I will unveil the mysteries of home appliances, helping you to purchase, use, and maintain various appliances more intelligently. 0 1. Basic Classification and Working Principles of Home Appliances Home appliances can be roughly divided … Read more
(1) The drive waveform of soft switch welding machines rises and falls at an angle, as shown in the figure below. The waveform of hard switch machines is like a single tube wave, rising and falling straight. Issues with absorption can cause spikes in the waveform. During maintenance, some waveforms may be unfamiliar; if the … Read more
The circuit board of a water purifier is the core component responsible for controlling the entire system’s operation, including water quality filtration, purification, and display functions. If the circuit board malfunctions, it may cause the water purifier to operate improperly, leading to frequent starts and stops. 1. Functions and Components of the Water Purifier Circuit … Read more
When you open the aluminum alloy case of the ECU, you will see a PCB (a multilayer epoxy resin board) with various ICs (integrated circuits or commonly known as chips), resistors and capacitors the size of sesame seeds, power MOSFETs (field-effect transistors) and power diodes, as well as connectors for wiring harnesses, etc. The ECU … Read more
Common Faults and Solutions for LCD and DLP Projectors:Projectors are essential electronic devices for our daily office work, and they are indispensable for company meetings and training sessions. However, electronic devices can encounter various faults. What should we do if our projector has minor issues during use? Below, Hongchao Intelligent Security summarizes some common small … Read more
Three-phase asynchronous motors are widely used. When electricians are repairing motors, they often encounter some old motors that lack nameplates or markings, or the nameplates and markings are unclear. How to use a multimeter to determine and test the motor windings, number of poles, speed, etc., is discussed below. 1. Determining the Start and End … Read more
Click “Mechanical Industry Press E Vision” for quick follow-up A multimeter is a magnetic-electric instrument equipped with a rectifier that can measure various electrical parameters such as AC and DC current, voltage, and resistance. Some models can also measure key parameters of transistors and capacitance. Mastering the use of a multimeter is one of the … Read more
Insulation resistance refers to the ability of electrical equipment’s insulation material to isolate current, which is an important indicator in safety testing of equipment. It can determine whether the insulator is intact, and identify defects such as moisture, insulation degradation, and insulation breakdown. Therefore, before using electrical equipment, it is essential to use an insulation … Read more
Please follow our WeChat public account “Finger Motorcycle” to read the latest motorcycle maintenance and repair information. Search for ID mscmoto directly in WeChat to follow! The most notable feature of fuel-injected motorcycles compared to carbureted models is the addition of an onboard computer, also known as the ECU (or ECM). It automatically adjusts the … Read more
Source:Medical Equipment Author:Huang Jian The ultrasound diagnostic device, as a precise and valuable clinical diagnostic medical equipment, is currently widely used in various hospitals. Although there are numerous brands and model specifications, the working principle is basically the same, which is that the instrument emits ultrasound waves through the probe. The ultrasound waves reflect off … Read more