Product Details

Brief Introduction

AC soft start device is a kind of motor control device adopting advanced power electronic technology, which is specially used to solve the problems of current impact and mechanical stress during the starting process of AC induction motor. The device realizes smooth acceleration of the motor by intelligently adjusting the motor terminal voltage and current, effectively avoiding the negative impact of the traditional direct starting method on the power grid and mechanical system, and playing an increasingly important role in industrial production.

 

From the point of view of technical principle, AC soft start device is mainly based on thyristor phase control technology or the latest IGBT power devices, which realizes stepless regulation of motor input voltage by precisely controlling the conduction angle of semiconductor devices. During the starting process, the equipment will gradually increase from the initial voltage (usually 30%-60% of the rated voltage) according to the preset acceleration curve, so that the motor torque increases smoothly. This control method not only limits the starting current to a safe range, but also automatically adjusts the acceleration time according to the load characteristics, which is especially suitable for fans, pumps and other loads with specific mechanical characteristics.

 

Modern AC soft start device has been significantly upgraded in terms of functionality. In addition to the basic voltage ramp start mode, a variety of intelligent control strategies have been developed: current limit start mode ensures that the starting current does not exceed the set threshold; torque control start provides optimal acceleration characteristics for heavy equipment; double ramp start is suitable for occasions requiring special acceleration curves. The microprocessor integrated inside the device can monitor key parameters such as voltage, current and power factor in real time and realize adaptive control through advanced algorithms, which greatly improves the reliability and flexibility of the system.

 

With the development of Industry 4.0, AC soft start device is rapidly evolving in the direction of intelligence and networking. Modern equipment is commonly equipped with industrial communication interfaces, supporting PROFIBUS, Modbus, Ethernet and other communication protocols, which can be seamlessly integrated into factory automation systems. The addition of cloud connectivity enables equipment to realize remote monitoring, data analysis and predictive maintenance. In addition, some of the latest products introduce energy feedback technology, which feeds braking energy back into the grid during the motor deceleration phase, further improving system energy efficiency. These technological innovations allow AC motor soft starters to evolve from simple starters to comprehensive motor management systems.

 

Main Technical Parameters

Rated Voltage	AC 380V±15
Frequency	50Hz
Cooling Type	Air natural
Power Supply Unit	Three phase four wire
Ambient Temperature	-20℃~+42℃
Altitude	When the altitude above sea level exceeds 2000 meters, the cabinet should be de-rated for use
Environment	no combustible, explosive and corrosive gas, no conductive dust, no severe ventilation and crush in the mounting place.
Protection Grade	IP30