High-power transmitter soft starter and soft start method thereof

Abstract

The invention discloses a high-pressure transmitter soft starter and a soft start method thereof. The high-pressure transmitter soft starter comprises a PLC (programmable logic controller), a D / A (digital to analog) converter, a soft start control circuit and a phase control alternating-current module. The PLC sets initial level of soft start control and digital signals of rise speeds for controlling rise changes of the level, the digital signals are converted into analog control level by the D / A converter, the analog control level is sent to the control end of the phase control alternating-current module after being emitted and amplified by the soft start control circuit and is switched on according to a set conduction angle, and the conduction angle is increased according to a set change rate until complete switch-on is completed. The high-pressure transmitter soft starter and the soft start method thereof have the advantages that the high-pressure transmitter soft starter is flexible to control and high in adaptability, the initial level of soft start and changed rise speeds can be adjusted, steadiness and reliability of a soft start process are achieved, and particularly, unlike conventional soft start circuits, resistor burning caused by overheating is avoided when the soft start process is long or out of control.

Description

Technical field [0001] The invention relates to a soft-start device and a soft-start method for a power supply and a transmitter in the field of radar and electronic countermeasures, and in particular to a soft-start device and a soft-start method for a high-power transmitter. Background technique [0002] With the increase in the power of radar, the improvement of electronic countermeasures, and the increase in the power requirements of transmitters (or microwave amplifiers) in large scientific projects, the demand for high-power transmitters has continued. These high-power devices not only need to be Large power, and when it is put into operation, it often has a large load traction on the power grid or power station, which is easy to cause instantaneous interference to the power station and power grid, causing tripping and power failure. On the other hand, since the filter inductance in a high-power transmitter is generally unlikely to be too large, its choking effect often can...

AI Technical Summary

Problems solved by technology

First, when the soft-start time is too long, especially when the AC contactor is out of control and the resistor cannot be short-circuited in time, the resistor will overheat or burn out due to excessive power consumption, and eventually lose the soft-start function; secondly, this soft-start method is not flexible enough , when the high-voltage power supply is divided into multiple gears, the soft-start circuit can only act once, and the soft-start control cannot be performed for each high-voltage gear; again, the length of the soft-start process cannot be adjusted according to needs

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