Can a three-phase fully controlled bridge rectifier regulator be used on a half controlled bridge?

Can a three-phase fully controlled bridge rectifier regulator be used on a half controlled bridge?

In the excitation operation of synchronous motors, it is common to encounter the problem of parallel operation of different thyristor power bridges. Whether it is accidental switching or normal switching involving parallel operation of three-phase fully controlled bridge and three-phase half controlled bridge, it is therefore proposed whether parallel operation will damage the thyristor components, whether switching between each other will generate reactive power impact, how much reactive power impact will be, and what impact it will have on the DC rectified voltage.

The output terminal of the three-phase fully controlled bridge rectifier regulator is a full bridge structure composed of four controllable thyristors, which can complete the full wave rectification of three-phase AC power. The semi controlled bridge structure only requires two controllable components, which is different from the structure of a three-phase fully controlled bridge rectifier regulator. If you want to control a half bridge circuit, you need to use a controller that relies on the half bridge structure in order to correctly control the controllable components of the half bridge circuit. Therefore, three-phase fully controlled bridge rectifier regulators cannot be directly used in semi controlled bridge circuits and require alternative control methods.

Does a three-phase bridge fully controlled rectifier circuit belong to a boost or buck circuit?

The three-phase bridge fully controlled rectifier circuit belongs to the step-down circuit. In the circuit, the input three-phase AC power is stepped down by a transformer, then rectified by full control, and finally filtered by a capacitor to obtain a DC power supply. Therefore, the output voltage of the circuit is much lower than the input voltage, which belongs to the step-down circuit.

What are the requirements for the trigger circuit in a three-phase bridge fully controlled rectifier circuit?

The three-phase bridge fully controlled rectifier circuit requires the use of controllable devices such as thyristors (SCR) for control, and the function of the trigger circuit is to control the controllable devices to conduct at the appropriate time. Therefore, the trigger circuit plays a crucial role in the fully controlled bridge rectifier circuit.

The triggering circuit needs to meet the following requirements:

The time and position of the triggering pulse need to match the conduction conditions of the controllable devices in the circuit. In a three-phase fully controlled bridge rectifier circuit, the conduction angle of each thyristor is determined based on the trigger pulse signal in the control signal.

2. The triggering pulse needs to have sufficient amplitude and rise time to ensure that the controllable device can conduct normally.

3. The triggering circuit needs to have reliable isolation and protection functions to avoid damage to controllable devices due to interference from triggering pulses or other faults.