Integrated variable-frequency intelligent permanent magnet motor driving system

Abstract

The invention discloses an integrated variable-frequency intelligent permanent magnet motor driving system which comprises an efficient rare earth permanent magnet variable-frequency motor, an intelligent driver and an air guide cover, and rotating shafts and fan blades are arranged at the front end and the rear end of the efficient rare earth permanent magnet variable-frequency motor in a one-to-one correspondence mode. The air guide cover is a semi-closed containing cavity with an opening in the front side and an opening in the upper side, and the opening in the front side of the air guide cover is buckled to the rear end of the efficient rare earth permanent magnet variable-frequency motor. The intelligent driver is located above the efficient rare earth permanent magnet variable-frequency motor and the air guide cover. The intelligent driver comprises a controller and a driver connected with the controller. The intelligent driver is fixed at the top end of the high-efficiency rareearth permanent magnet variable-frequency motor. According to the integrated variable-frequency intelligent permanent magnet motor driving system, the efficient rare earth permanent magnet variable-frequency motor is adopted to replace a conventional asynchronous motor, and the efficiency of the motor in the low-load state is greatly improved.

Description

technical field [0001] The invention relates to an integrated frequency conversion intelligent permanent magnet motor drive system, which is mainly used for non-negative pressure secondary water supply equipment. Background technique [0002] The whole set of non-negative pressure water supply equipment consists of a steady flow tank, a vacuum suppressor, a frequency conversion speed regulation water pump unit, a pressure sensor, a frequency conversion control cabinet, a backflow preventer (optional), a disinfection device (optional) and a small flow pressure tank (optional) etc. The water inlet pipe drawn from the municipal pipe network is directly connected to the water inlet of the steady flow tank, and the water outlet of the steady flow tank is connected to the water inlet pipe of the pressurized pump unit after passing through the disinfection device, and the outlet pipe of the pressurized unit is connected to the user’s water pipe , to supply water directly to the us...

AI Technical Summary

Problems solved by technology

There are the following main problems: 1. No energy saving. Since the water pump unit is in the low-frequency and low-load operation state for a long time, the efficiency and power factor of the conventional asynchronous motor or variable frequency asynchronous motor driving the water pump are very low, which causes the equipment to run inefficiently for a long time; 2. The control system is complex, error-prone, and low in digitalization and intelligence; 3. The software expansion function is not strong, and intelligent monitoring and remote diagnosis are difficult to achieve

[0005] After retrieving Chinese patents, there are many inventions related to motors, but there is no integrated frequency conversion intelligent speed regulation water pump unit driven by high-efficiency rare earth permanent magnet variable frequency motors.

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