Inverter and frequency conversion principle of inverter
Inverter and frequency conversion principle of inverter The process by which a frequency converter converts direct current to alternating current is called “inverting”. Let’s talk about the inversion process first, which is divided into two steps. Step 1: Convert DC to AC The above is a schematic diagram of a single-phase inverter. 1, 2, 3, […]
Soft starter maintenance faults and solutions
Soft starter input power failure 1. Check whether the input power is normal step by step. First, check whether the input power of the soft starter is normal. If the input power is abnormal, check whether the fuse is blown and whether the circuit breaker is out of phase. 2. If it is determined that […]
What are the common problems of micro switches
1. The problem of the cause of the poor contact of the micro switch The first possibility is the adhesion of dust on copper sheets, switch contact points, etc., it is recommended to use sealed electric switches, the second is the damage of malignant gas in the natural environment, resulting in the formation of an […]
Can the DC-AC base of the intermediate relay be universal?
Whether the intermediate relay is DC or AC, the working principle is the same, the only difference is the voltage level. The working principle of the intermediate relay is the same as that of the relay and the AC contactor. When the contactor coil is energized, the coil current will generate a magnetic field, and […]
Button switch structure principle
The button switch may be the simplest component in the electrical circuit, but it does control the lifeblood of the entire control circuit, so it is also called the “master switch”. As a novice, a comprehensive understanding of various button switches and clever and flexible use can make us do more with less. Button switches […]
What is a temperature controller
Thermostat, the full name of temperature controller, also called temperature control switch, temperature protector, is divided into two types: mechanical type and electronic type. It is mainly based on the temperature change of the working environment. Physical deformation occurs inside the switch, thereby Some special effects are produced, and the on or off action is […]
Toggle switch performance specifications and features
Mechanical Specifications 1. The normal action force is: 250+_50gf 2. Terminal strength Apply force (500gf) to the tip in either direction for 1 minute. There are no cracks in the row feet, such as abnormal movement, etc., Requirements: Satisfy mechanical and electrical performance. 3. Test Standard Status Test the temperature, humidity, and air pressure as […]
What does the carrier frequency of the inverter mean?
The carrier frequency of the inverter is to modulate a lower signal frequency to a relatively higher frequency. The higher frequency modulated by the low frequency is called the carrier frequency, also called the fundamental frequency. When the carrier frequency is high, the current waveform is sinusoidal and smooth. In this way, the harmonics are […]
The difference between proximity switch and travel switch（2）
1. The proximity switch is a position switch that can be operated without direct mechanical contact with the moving parts. When the object is close to the sensing surface of the switch to the action distance, the switch can be moved without mechanical contact and any pressure, thereby driving DC appliances or provide control instructions […]
Necessity and difference of built-in and external bypass contactor of soft starter
The contactor connected in parallel with the soft starter is called a bypass contactor, because the long-term use of the soft starter to start will cause a lot of pressure on the thyristor. Excessive current of the thyristor for a long time is not good for it. At the same time, it is also easy […]