Motor driving circuit with power reversal protection and fan device

Abstract

A motor driving circuit with power reversal protection and a fan device are disclosed. The motor driving circuit has a supply end and a ground end. A reversal protection circuit is configured in the motor driving circuit and is electrically connected to the supply end. When a power line and a ground line of a power supply electrically and respectively connect to the supply end and the ground end (indicating a correct connection condition), the reversal protection circuit is turned on, so that the motor driving circuit receives the power transmitted from the power supply to operate. When the power line and the ground line of the power supply electrically and respectively connect to the ground end and the supply end (indicating an incorrect connection condition), the reversal protection circuit is turned off, so that the motor driving circuit does not receive the power transmitted from the power supply.

Description

BACKGROUND[0001]1. Technical Field[0002]The present disclosure relates to a motor driving circuit and a fan device, in particular, to a motor driving circuit with power reversal protection and a fan device having the same.[0003]2. Description of Related Art[0004]A motor driver is a necessary modern industrial power transformation device. The motor is capable of transforming electricity into kinetic energy required for driving devices. Conventional motors include DC motors, AC motors, stepping motors, and etc. Motors are often applied to drive one element of the electronic device, for example, blades of the fan device are usually rotated with the motor. Therefore, how to design an efficient motor has become a major objective in the industry. The motor driving circuit is constituted by a stator and a rotor configured opposite to each other. The rotor can rotate with respect to the stator to operate the motor by the magnetic force and magnetic field change, so that the fans configured ...

AI Technical Summary

Benefits of technology

The patent text describes a motor driving circuit that has a reversal protection circuit to prevent the power supply from burning out. This reversal protection circuit increases the life time of the power supply and prevents damage to the motor driving circuit. Additionally, the patent text also describes a fan device that improves cooling efficiency.

Problems solved by technology

However, when the power line and the ground line of the power supply are connected in reverse, i.e., the ground line electrically connects to the supply end and the power line electrically connects to the ground end, the power supply transmits the power to the motor driving circuit through the ground end, so that the diode of the motor driving circuit is forward biased, to burn out the power supply.

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