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 |
Motor soft start and variable frequency inverter (VFD) are both methods used to control the starting and stopping of electric motors, but they have some key differences:
Soft start: A motor soft start is a method used to limit the inrush current and torque during motor starting. It typically uses a reduced voltage or a series of voltage steps to slowly ramp up the motor speed to its full rated speed. Soft starters are often used in applications where the motor needs to be started and stopped frequently, such as conveyor systems or pumps. Soft starters are also relatively simple and inexpensive compared to VFDs.
Variable frequency inverter (VFD): A VFD is a device that allows the motor to run at variable speeds by controlling the frequency and voltage of the power supplied to the motor. This provides precise control over the motor speed, torque, and acceleration/deceleration rates, making VFDs ideal for applications where speed control is critical, such as HVAC systems, pumps, and fans. VFDs are more complex and expensive than soft starters, but they offer much greater flexibility and control.
In summary, the main difference between motor soft start and variable frequency inverter is that soft starters provide a simple method to limit the inrush current and torque during motor starting, while VFDs provide precise control over the motor speed, torque, and acceleration/deceleration rates.
