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 |
A motor soft starter typically consists of the following components:
These components work together to gradually ramp up the voltage and current supplied to the motor, reducing the inrush current and mechanical stress on the motor. This can prolong the life of the motor and reduce energy costs.
Power circuit: This circuit includes the power electronics components such as thyristors, diodes, capacitors, and inductors that control the flow of electricity to the motor.
Control circuit: This circuit includes the control electronics components such as microprocessors, sensors, relays, and switches that monitor the motor and control the power circuit.
User interface: This interface allows the user to program and monitor the soft starter. It typically consists of a display screen, buttons, and indicator lights.
Bypass contactor: This component is used to bypass the soft starter during normal operation, reducing the energy losses and heat generated by the soft starter.
Protection devices: These devices protect the motor and soft starter from overcurrent, overvoltage, and other electrical faults. Examples include fuses, circuit breakers, and overload relays.
Heat sink: This component dissipates the heat generated by the power circuit, preventing damage to the soft starter.
Enclosure: The motor soft starter is typically enclosed in a protective housing that provides insulation and protection from the environment.
