Medium frequency heating power supply is a kind of special equipment for supplies should brake pipe electronics convert three-phase alternating current flow to a certain frequency of medium frequency current value of the special equipment, widely used in magnetic induction smelting smelting and manufacturing of induction heating.
Three-phase bridge type all control inverter circuit is essentially a set of common negative half-wave rectifier circuit fuse predictable anodic oxidation treatment half-wave rectifier circuit connected, predictable in the last section of the content of total negative half-wave rectifier circuit predictable in fact only application of power transformer is the positive half cycle, a total of anode oxidation treatment half-wave rectifier circuit application only predictable power transformer is the negative half cycle, if the two kinds of load current value of the principle of switch power supply can be used as the same power transformer transformer.
Which connect two kinds of principle of switch power supply can get three-phase product chain all control inverter circuit.
Open the single pulse to have ample overall width, generally USES single pulse wide open or double narrow single pulse.
But in practical application, to reduce loss of single pulse transformer of transformer core and most of them adopt double narrow single pulse, with one single pulse wide, single pulse width should be more than 90 degrees, is less than 120 degrees;
Using double narrow single pulse, the total width for the single pulse - 25 degrees
At the forefront of 30 degrees, single pulse spacing 60 degrees.
To master the composition of medium frequency heating power supply specialized equipment, principle of each part of switch power supply,
Three-phase bridge rectifier circuit, turn on the switch power supply principle, the parallel resonant inverter power supply power supply circuit, maintain the principle of switch power supply)
The basic principle of.
Master the output voltage, current value, and work on both sides of the silicon controlled voltage waveform, based on the three waveform, measure about the quantity, so that they can properly choose the electronic devices, such as thyristor can application waveform analysis principle of switch power supply, mechanical failure, hold the principle of switch power supply and the main principle of switch power supply voltage with a step defined in the work and maintain with the step of the way, grasping the common medium frequency heating power the use of special equipment problems.
Mastering the special medium frequency induction heating equipment
installation, adjustment, simple method for mechanical fault maintenance.
To grasp the three phase active inverter power supply circuit principle and the application of active inverter power supply power supply circuit.
This class is a * medium frequency heating power supply manufacturers must have.
Medium frequency heating power -
Three-phase product chain all control inverter circuit
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