81001-275-02-R   Allen-Bradley Silicon controlled inverter module

Description

81001-275-02-R Allen-Bradley Silicon controlled inverter module

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81001-275-02-R Transistor converter, is the use of transistors as switching components to convert DC current into AC current device. Although the transistor has the advantage of fast switching speed, but to get the breakdown voltage is high, while the maximum collector current is large transistor is more difficult. Therefore, the transistor converter is generally used in the power of not more than 200 ~ 300 W power supply.

81001-275-02-R Silicon controlled inverter, is the use of silicon controlled as a switching element to convert DC current into AC current device. Because the blocking voltage of SCR can generally reach hundreds of volts or even thousands of volts, and the forward current can reach tens or even hundreds of amps. So the use of SCR inverter can be made for hundreds of watts to a few kilowatts of high power converter.

81001-275-02-R SCR inverters are different from transistor converters. SCR itself can not realize the transformation of working state. When it changes from the cut-off state to the on-off state, it must be triggered by a separate triggering circuit, and when the SCR changes from the on-off state to the cut-off state, it also needs a special reversing element to reverse the voltage on the SCR. This is an important difference between SCR inverters and transistor converters.

There are many types of inverters. According to the commutation mode can be divided into separate excited (active) inverter and self-excited inverter. According to the connection between the reversing capacitor and the load, the self-excited inverter can be divided into parallel and serial-connected two kinds, series inverter is the reversing capacitor and load series of self-hoon inverter; Parallel inverters are self-excited inverters in which commutating capacitors and loads are in parallel. Parallel inverter, because of the switching loss of the SCR element, it is unfavorable in high frequency use, but it requires small commutation and commutation capacitance, so the parallel inverter is very good at low frequency. The series inverter is suitable for high frequency operation.

In order to reduce the switching loss of the SCR element, improve the efficiency of the inverter and make the inverter work reliably, the SCR element with the minimum turn-on time and disconnection time should be selected.

According to the output AC voltage phase number is different, and can be divided into single-phase inverter and three-phase inverter two.

81001-450-53-R

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