Reduce the starting current of the motor, reduce the di-stribution capacity, and avoid investment in capacity ex-pansion;
Reduce starting stress and extend the service life of motors and related equipment;
Smooth start and soft stop avoid the surge problem and water hammer effect of traditional starting equipment;
A variety of starting modes and a wide range of current and voltage settings, can adapt to a variety of load occ-asions, improve the process;
Improve the reliable protection function, more effective-ly protect the safety of the motor and related equipment;
Can be used for frequent start and stop The occasion.
In the trend of advocating smart and simple industrial automation, environmentally friendly products, value-added solutions, K-Drive, as one of the world's leading drive manufacturers aggressively investing in R&D, production, and continuous quality improvement, is well positioned to provide its customers with technology-driven, performance-outstanding products such as VFDs, wind power converters, servo drives, HEV/EV drives, helping its customers save energy and increase industrial productivity with sustainability on the one hand, and enhancing their entire value-chain quality, delivery, and services on the other hand.
In production, rigorous quality control is implemented on components, circuit boards, and the finished goods, assuring products without defects.
| Performance | Common brands | K-Drive |
|---|---|---|
| Applicable motors | Asynchronous motors | Asynchronous /synchronous motors |
| Starting torque | 2.0Hz, 150% (sensor-less vector control) 0Hz, 180% (closed-loop vector control) | 0.5Hz, 180% (sensor-less vector control) 0Hz, 200% (closed-loop vector control) |
| Speed adjustable range | 1:100 (SVC), 1:1000 (VC) | 1:200 (SVC), 1:1000 (VC) |
| Ambient temperature (no derating required) | -10-40ºC | -10-50ºC (for most of the models) |
| Rated input voltage | 208VAC-400VAC | 208VAC-480VAC |
| Communication | Modbus RTU//ASCII | Modbus RTU//ASCII Profibus-DP, CANopen, etc. |
| Position control (fixed length, or angular positioning) | × | √ |
| Field weakening control | × | √ |
| Autotune online | Online | Online & Offline |
| Short-time ramp-up | Trip | No trip |
| Customized features (software and/or hardware) | Unprocurable or no experience | Procurable with rich experience |
Selecting a motor soft starter involves several steps, and the process can vary depending on the specific application and requirements. However, here are some general steps you can follow:
Determine the motor's voltage and current rating: Check the motor nameplate or consult the manufacturer's specifications to determine the voltage and current rating of the motor.
Calculate the starting current: The starting current is typically several times the full load current of the motor, and it can cause voltage dips and other power quality issues. You can use the following formula to estimate the starting current:
Starting current = Full load current x Starting torque / Rated torque
The starting torque and rated torque values can also be found on the motor nameplate or manufacturer's specifications.
Choose the soft starter type: Soft starters can be classified into different types based on the control method, power rating, and features. Select the type that meets your application requirements and budget.
Check the soft starter specifications: Check the soft starter specifications such as the rated voltage, current, power, and control voltage to ensure they match the motor's requirements.
Verify compatibility: Ensure the soft starter is compatible with the motor and the power supply system, including the type of starter, enclosure, and protection features.
Consider additional features: Some soft starters come with additional features such as bypass contactors, fault protection, communication interfaces, and monitoring capabilities. Consider if these features are necessary for your application.
Consult with experts: If you are unsure about any aspect of selecting a motor soft starter, consult with experts such as the motor or soft starter manufacturer or a qualified electrical engineer.
Remember to always follow the manufacturer's guidelines and instructions when selecting and installing a motor soft starter to ensure safe and reliable operation.
