AU620 Inverter: Efficiency Improvement When Switching Between Different Motors

AU620 intelligent water pump inverter achieves significant efficiency improvement by supporting switching between asynchronous motors and Permanent Magnet Synchronous Motors (PMSM), combined with its unique control logic.

Although there is no single fixed percentage value for the efficiency improvement of AU620 when switching between the two motors in the reference data, specific efficiency improvement performance can be derived from its technical characteristics and motor comparison data:

1. Motor-Level Efficiency Optimization (PMSM vs Asynchronous Motor)

According to the motor performance comparison in the reference data (from general catalog):

• High Efficiency & High Power Factor: Permanent Magnet Synchronous Motors (PMSM) themselves have higher operating efficiency and power factor.
• Wider High-Efficiency Range: Compared with Induction Motors (IM), synchronous motors have higher efficiency at different load ratios and speeds, and a wider range of high-efficiency operation.
• Energy Saving Under Variable Working Conditions: In cases of frequent speed regulation and load changes, the energy-saving effect of driving synchronous motors with AU620 is more obvious than driving asynchronous motors.

2. Inverter-Driven Efficiency Improvement Features

AU620 integrates multiple energy-saving logics internally, further amplifying the efficiency performance after motor switching:

• Automatic Energy-saving Running: The inverter has an automatic energy-saving mode, which will automatically reduce the output voltage under light loading conditions to save electrical energy.
• Precise PID Speed Regulation: AU620 adopts advanced PID algorithm, which only maintains motor speed on demand by real-time monitoring of pipe network pressure, avoiding energy waste caused by full-speed operation of traditional water pumps.
• Sleep Function: When the system detects no water demand, the inverter will enter sleep mode to minimize power consumption.

3. Practical Advantages in Application

• "One Inverter for Two Motors": AU620 is the industry's first product compatible with permanent magnet synchronous and asynchronous motors (switched via parameter U3-32). This compatibility allows users to upgrade existing ordinary asynchronous motors to high-efficiency permanent magnet motors without replacing the inverter, and directly obtain energy-saving benefits through the improvement of motor performance.
• Soft Start: The system supports soft start, which reduces the current impact during motor startup and decreases losses on the power grid side.