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Hengye Intelligent Drive (Hangzhou) Co., Ltd.

Established in 2004, Hengye Intelligent Drive (Hangzhou) Co., Ltd. has long been focusing on the R&D and manufacturing of AC motors, DC motors, servo motors, brushless motors, geared motors, which have a high reputation in the industries of cleaning equipment, medical equipment, logistic and handling equipment, industrial controls, vacuum pumps, etc.
As AC Geared Motor Manufacturers and AC Geared Motor Factory in China, Hengye has been focusing on talent cultivation and has a large number of senior and stable R&D engineers, process and quality engineers. At the same time, Hengye has been continuously upgrading its equipment capacity, with ultra-precision machining equipment including OKUMA, MAZAK, HASS, BROTHER, as well as advanced testing equipment in the industry, such as ZEISS, JENOPTIK, MITUTOYO, and so on.
While guaranteeing that the technology and quality exceed the industry standard, Hengye is committed to providing more professional and efficient customized solutions to help customers solve problems. Supply Custom AC Geared Motor. We will cooperate with our customers to develop together and create brilliant future.
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AC Geared Motor Industry knowledge
How does the soft starter of an AC reduction motor limit the inrush current that occurs when the AC motor is started at full voltage?
The soft starter of an AC gear motor limits the inrush current that occurs when the motor is started at full voltage by gradually increasing the voltage supplied to the motor. Soft starters use electronic controllers and semiconductor devices, such as thyristors or field effect transistors, to adjust the voltage and current waveforms to achieve a smooth starting process. The following is the working principle of the soft starter to limit the full voltage starting surge current of the AC motor:
    - Soft starters limit the starting current of the motor by controlling the rate at which the voltage ramps up. During the starting process, the soft starter gradually increases the output voltage to slowly accelerate the motor to the rated speed. The smooth ramp-up of voltage can effectively reduce the current impact during startup, reduce the voltage drop of the power grid, and reduce the stress on mechanical equipment and electrical components.
    - The soft starter allows the user to adjust the starting time of the motor, which is the time it takes for the motor to reach the rated speed from a stopped state. Extending the start-up time can further reduce the current peak at start-up and ensure a smooth acceleration process, thus reducing the shock to the mechanical and electrical system.
    - Soft starters usually have a current limiting feature that limits the maximum current the motor can draw when starting. By setting a current limit value, the soft starter prevents motor overload and protects the electrical system from potential damage. Before the motor reaches rated speed, the soft starter dynamically adjusts the output voltage to keep the current within a safe range.
    - Soft starters usually have an adjustable soft-start curve that can be optimized according to the requirements of the specific application. The soft-start curve determines the changing patterns of voltage and current to achieve optimal starting performance and system stability. Users can adjust the soft-start curve according to the motor's load characteristics and working environment to minimize the shock and pressure during startup.
    - In some cases, the soft starter can be equipped with an inverter control function, allowing the user to control the output voltage and frequency in a modulated manner. By adjusting the operating mode and parameters of the inverter, more precise motor control can be achieved and the current and voltage waveforms during startup can be further optimized.

How does the soft starter of an AC reduction motor limit the starting current of the motor by controlling the ramp rate of the voltage?
The soft starter of an AC Geared motor limits the starting current by controlling the ramp rate of the voltage. Here's how it works:
   - When the AC reduction motor is started, the soft starter gradually increases the voltage supplied to the motor over a predetermined ramp-up time. Instead of instantly applying full voltage to the motor, the soft starter ramps up the voltage gradually.
   - By gradually increasing the voltage, the soft starter limits the rate at which the motor accelerates and thus reduces the starting current drawn by the motor. The starting current is directly proportional to the rate of change of voltage (dv/dt). Therefore, by controlling the dv/dt, the soft starter effectively limits the starting current.
   - The gradual voltage ramp-up reduces the inrush current that occurs when the motor is started at full voltage. Inrush current is the high current surge that flows into the motor windings during startup. By limiting the rate of change of voltage, the soft starter mitigates this inrush current, preventing voltage sags, voltage fluctuations, and potential damage to the motor windings and electrical system.
   - The controlled ramp rate of voltage provided by the soft starter protects the motor and connected equipment from mechanical stress and electrical damage during startup. It prevents sudden shocks and torque spikes that can occur with full voltage starting, ensuring a smooth and controlled startup process.
   - Soft starters typically allow users to customize the ramp-up time according to the specific requirements of the motor and application. Longer ramp-up times result in gentler acceleration and further reduction in starting current, while shorter ramp-up times provide quicker startup.
   - By limiting the starting current and providing a smooth startup, the soft starter helps optimize the performance of the AC reduction motor. It reduces wear and tear on motor windings, bearings, gears, and other mechanical components, extending the lifespan of the motor.