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release time:2024-04-07 Hits: Popular:AG11 battery
Basics of no. 7 alkaline battery technology: "soft switching" technology to reduce switching losses
OFweek no. 7 alkaline battery Network: With the continuous development of electronic technology, there are also various types of electronic equipment, which are naturally closely related to people's work and life, and any electronic equipment also needs the support of no. 7 alkaline battery. The continuous maturation and development of electronic technology has put forward the requirements for no. 7 alkaline battery design. They all need a stable no. 7 alkaline battery to provide energy for their normal operation. The switching technology that controls the no. 7 alkaline battery is a major factor affecting the stability of the no. 7 alkaline battery. The following will introduce the hard switching technology and soft switching technology in the switching technology.
The volume and weight of magnetic components account for a large proportion of switching power supplies. The development direction of switching power supplies is small size, light weight and low cost. High frequency can effectively reduce the volume and weight of magnetic components, that is, the switching device. The higher the working frequency, the smaller its size and weight. In traditional DCOC converters, the switching devices work in a hard switching state.
The disadvantages of hard switching are as follows:
(1) The turn-on and turn-off process losses are relatively large;
(2) Inductive shutdown problem:
When there are inductive devices in the circuit, when the switching device is turned off, a very high voltage spike will be induced, which can easily damage the switching device;
(3) Capacitive opening problem:
When the switching device is turned on under high voltage, all the energy in the junction capacitance of the switching device will be consumed on the device, which may easily cause the switching device to be damaged due to overheating;
(4) Diode reverse recovery problem:
When the diode changes from conduction to cutoff, there is a reverse recovery time. During this time, the diode is still in the conduction and off state. If the switching device connected in series with it is turned on immediately, a large inrush current will be generated and the switch will be easily damaged. device.
Due to the above shortcomings of hard switching, it limits the increase in the operating frequency of switching devices. Before the advent of soft switching technology, the switching loss of power switching devices was very large. In order to make up for the shortcomings of hard switching work, soft switching technology is proposed.
The principle of soft switching technology
The so-called soft switch corresponds to the hard switch. Hard switching means that during the turn-on and turn-off process of the power switch, the voltage and current change relatively large, resulting in large switching losses and noise. The switching losses increase with the increase of the switching frequency, resulting in a decrease in circuit efficiency; switching noise It brings serious electromagnetic interference to the circuit, affecting the normal operation of itself and surrounding electronic equipment.
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