Direct-current brushless motor used for electrical equipment powered by double power supplies and control method of direct-current brushless motor

Abstract

The invention discloses a direct current brushless motor used for dual power supply electrical equipment and a control method, the direct current brushless motor comprises a motor monomer and a controller, the controller comprises a power supply circuit, a motor microprocessor MCU and a bus voltage detection circuit, and the power supply circuit comprises an AC / DC rectification circuit, a thermistor PTC1, a relay JK and an electrolytic capacitor C1. The input end of the AC / DC rectifying circuit is connected with an input power supply, the output end of the AC / DC rectifying circuit charges the electrolytic capacitor C1 through the thermistor PTC1 and forms direct current bus voltage Vbus output, the relay JK is connected to the two ends of the thermistor PTC1 in parallel, and the bus voltage detection circuit inputs the detected direct current bus voltage Vbus to the motor microprocessor MCU; the controller further comprises a power supply detection circuit, the power supply detection circuit 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 or not through the power supply detection circuit, and if the input power supply is powered off, the motor microprocessor MCU controls the relay JK to be switched off.

Description

technical field [0001] The invention relates to a DC brushless motor used in electrical equipment powered by dual power supplies and a control method. Background technique [0002] With the rapid development of information technology, the scale of data centers is 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 extremely important role in ensuring the normal operation of data centers. [0003] In order to avoid adverse consequences such as the 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 a dual power switching system structure, that is, in addition to using ...

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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

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