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Yuanchuang Electric YGQ series solid-state soft starters, low-voltage motor soft start cabinets, motor soft starters. ■ Scope of application and brief introduction to typical uses: Suitable for the smooth soft start of squirrel-cage asynchronous motors operating at 3-phase AC 50Hz, with a rated operating voltage of 380V and a rated operating power of 5.5KW–500KW. Pump: By utilizing the pump control function, it reduces the water hammer effect caused by fluid flow during startup and shutdown, thereby saving on system maintenance costs ； Ball mill: Starts using a voltage ramp to reduce wear on gear torque, minimize maintenance workload, and extend service life ； Fans: Solid-state soft starters are used in place of traditional starters, reducing belt wear and mechanical stress ； Compressor: Smooth startup is achieved through flow limitation, reducing motor temperature rise ； Crusher: Utilizes stall protection and rapid protection to prevent overheating and damage to the motor caused by mechanical failures and blockages ； Conveying machinery: Soft start and soft stop control are utilized to achieve a smooth and gradual start-up process as well as a smooth deceleration during shutdown, thereby preventing damage to the materials and equipment caused by shocks. ■ Working principle and performance characteristics: The YGQ series of cage-type motor solid-state soft starters acquire current and voltage signals from the motor’s stator circuit. After undergoing special conversion processes, these signals are used to control the conduction state of three bidirectional thyristors, thereby regulating the motor’s starting current and the input power during operation. This enables automatic tracking of changes in the motor load and automatic adjustment of the input power, achieving soft starting of the motor and efficient operation. Fully digital control using two microcontrollers: It features a 5-digit LED display that shows the operating status of the motor in detail ； Harvard-style microcontrollers possess strong anti-interference capabilities, ensuring the reliable operation of control systems in complex industrial environments with strong interference ； It offers three startup methods: constant current soft start, voltage ramp start, and pulse shock start. Suitable for various types of loads ； It offers two parking modes: free parking and soft parking. The soft parking feature can meet the mechanical requirements in different situations, and the soft parking time is adjustable ； It features reliable protection against overcurrent, overload, overheating, missing phase in the power supply, and missing phase in the output, ensuring a more reliable and safer start-up and operation of the motor ； Features cross-operating mode (via contactor bypass) ； Equipped with DCS remote control interface and computer RS485 interface ； Standard analog current output of 4–20mA.