What is a backpack motor?

The backpack motor is a backpack inverter and is directly carried by the water pump motor. The intelligent lock of backpack motor adds a backpack motor on the basis of semi-automatic intelligent lock. After unlocking verification, the lock will be unlocked automatically. However, because the motor is installed on the back plate and the conduction path is long, it takes 3 seconds to unlock the smart lock of the backpack motor.