Revolutionize Your Motor Efficiency: Harness the Power of FIELD WEAKENING Technology

The FIELD WEAKENING function of a motor refers to a phase during the motor startup process where the control system applies a low current to the motor, generating a moderate magnetic field in the rotor, but not enough to enable full motor operation. This phase is called the motor's Field Weakening state.

The primary function of the Field Weakening state is to help the motor overcome both static and dynamic friction during startup. This ensures a smoother start, reducing shock and stress on the motor, and minimizing the risk of damage to mechanical and electrical equipment. The weak magnetic function is typically implemented within the motor's startup control system, via controllers or inverters, which apply a small current to generate the Field Weakening. Once the motor starts successfully, the system gradually increases the current, allowing the motor to reach its normal operational state.

In some cases, the Field Weakening function can also be used for fault detection and protection. For example, if abnormal magnetic fields or magnetic resistance are detected during operation, the system can apply Field Weakening to diagnose and resolve issues, ensuring the safe operation of the motor and equipment.

Additionally, the Field Weakening function can be tailored to specific application needs, such as:

1. Reducing Startup Current Surge: In situations where it's essential to limit current surges on the grid, applying Field Weakening can reduce the current impact during startup, minimizing the effect on the grid and protecting the electrical system's stability.
2. Lowering Startup Torque: For applications requiring minimal torque impact during startup, such as when mechanical shock must be minimized, the Field Weakening function allows for a gradual increase in torque, ensuring a smoother startup while protecting the mechanical drive system.
3. Reducing Startup Power Demand: The Field Weakening function helps reduce the power demand during motor startup, especially for high-power motors or in conditions where power supply is limited. This decreases the impact on the grid and improves system efficiency.
4. Preventing Overload Protection Triggering: In some cases, motors may be restricted by overload protection during startup. Applying Field Weakening can ease the load, preventing the overload protection from triggering and ensuring the motor and system operate safely.

In conclusion, the Field Weakening function plays a critical role in smooth motor startup, equipment protection, and energy efficiency. When applied correctly, it enhances the motor system's stability, reliability, and safety, meeting the demands of various application scenarios.

We welcome all interested partners and professionals to connect and exchange ideas with us.