DC brushless motor used in electrical equipment powered by dual power supply and control method

Abstract

The invention discloses a DC brushless motor and a control method used by electrical equipment powered by dual power sources, including a motor unit and a controller. The controller includes a power supply circuit, a motor microprocessor MCU and a bus voltage detection circuit. The power supply circuit includes AC / DC rectifier circuit, thermistor PTC1, relay JK and electrolytic capacitor C1, the input terminal of the AC / DC rectifier circuit is connected to the input power supply, and the output terminal of the AC / DC rectifier circuit charges the electrolytic capacitor C1 through the thermistor PTC1 and The DC bus voltage Vbus output is formed, the relay JK is connected in parallel with both ends of the thermistor PTC1, and the bus voltage detection circuit inputs the detected DC bus voltage Vbus to the motor microprocessor MCU; the controller also includes a power detection circuit, a power detection circuit It is connected between the input power supply and the motor microprocessor MCU. The motor microprocessor MCU detects whether the input power supply is powered off through the power supply detection circuit. If the power supply is powered off, the motor microprocessor MCU controls the relay JK to disconnect.

Description

technical field [0001] The invention relates to a DC brushless motor and a control method used in electrical equipment powered by dual power sources. Background technique [0002] With the rapid development of information technology, the scale of data centers is also becoming larger and larger. For large data centers, computer room air conditioners are usually equipped. The computer room air conditioners need to work 24 hours a day to provide constant temperature and humidity protection for the data center. Air conditioners play an important role in ensuring the normal operation of data centers. [0003] In order to avoid adverse consequences such as loss of important data and affecting the normal operation of other systems due to the sudden interruption of the power supply system of the computer room air conditioner, the existing power supply system of the computer room air conditioner adopts the structure of the dual power switching system, that is, in addition to using I...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a brushless DC motor and a control method used in electrical equipment powered by dual power supplies, which can solve the problem that the brushless DC motor in the prior art has a large impact current when it is powered on for the second time during the power switching process, which is likely to cause a problem in the machine room. The air conditioner trips or damages the rectifier bridge, electrolytic capacitor, insurance tube and other components of the DC motor, which leads to the technical problem of shutting down the air conditioner in the computer room

Images