ABB 1SFB536068D1011 Soft Start Control Board

ABB 1SFB536068D1011 is the control board of the soft starter, which plays a core control role in the ABB soft starter. The following is its related introduction:

Function:

Trigger pulse control: Based on the thyristor phase shift control principle of the soft starter, the control board generates a trigger pulse signal to accurately control the conduction angle of the three-phase inverse parallel thyristor. During the startup process, the input voltage of the motor can gradually rise from zero value within the set time according to the preset function relationship, so as to achieve smooth starting of the motor and reduce the impact of the starting current on the power grid and the wear on the motor and mechanical load.

Power synchronization and detection: The control board has the power synchronization function to ensure that the thyristor trigger time is synchronized with the power supply to ensure the stable operation of the soft starter. At the same time, through the power detection function, the feedback motor current is monitored in real time, compared with the set value, and the output voltage is automatically adjusted according to the comparison result to control the motor current within the set range.

Soft stop control: After receiving the shutdown command, the control board controls the thyristor to gradually reduce the conduction angle from the full conduction state, and after a certain period of time until it is fully closed, the motor can be soft stopped, avoiding the water hammer phenomenon or mechanical impact that may be caused by the traditional parking method, and better protecting the motor and load equipment.

Protection function realization: It integrates a variety of protection functions, such as overcurrent protection, overvoltage protection, single-phase grounding protection, phase loss protection, three-phase unbalance protection, phase reversal protection, etc. When an abnormal situation is detected, the control board will quickly take corresponding protection measures, such as cutting off the motor power supply, issuing an alarm signal, etc., to protect the motor and soft starter from damage.

Working principle: The control board is based on a microprocessor, and processes and analyzes the signals detected by various sensors through internal electronic circuits and software programs. For example, by detecting signals such as power supply voltage and motor current, the conduction angle of the thyristor is calculated, and the corresponding trigger pulse signal is output to control the conduction degree of the thyristor, thereby achieving precise control of the motor voltage and current. At the same time, the control board also communicates and collaborates with other components of the soft starter, such as the power module, thyristor module, display panel, etc., to realize the overall function of the soft starter.

Application scenarios: Widely used in various industrial fields and commercial places that require soft start and soft stop control of motors. Common application scenarios include but are not limited to: start control of fans, water pumps, compressors and other equipment in factories; motor control of air conditioning systems, elevators and other equipment in commercial buildings; and other occasions with high requirements for the motor start and stop process and the need to reduce impact and wear.