Motor driven protective circuit

Abstract

This invention relates to a motor drive protection circuit including at least a Zener diode connected with a connection place of an end of a motor and a driving end of a driving circuit component, in which, at the instant when the motor is driven to rotate or changes the current volume, the Zener diode is used to reduce the voltage burst of the motor to protect the circuit components.

Description

technical field [0001] The invention relates to a motor drive circuit, in particular to a motor drive protection circuit capable of avoiding instantaneous surges when the motor is driven. Background technique [0002] A motor is a device that converts electrical energy into rotational kinetic energy, and its related applications can be seen everywhere. Its operating principle is composed of a coil that can allow current to flow, plus a permanent magnet. When the current flows in the coil , the magnetic field generated by its coil and permanent magnet can make the coil rotate, so that the motor can achieve the effect of rotation. [0003] A prior art motor drive circuit such as Figure 1A As shown, the motor drive circuit 1 includes a motor 10, a drive circuit assembly 13 and a power supply 14; wherein, the motor 10 has two terminals, which are the two terminals of the coil (not shown) in the motor 10 , the two terminals are respectively electrically connected to the two dri...

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Problems solved by technology

[0003] A prior art motor drive circuit such as Figure 1A As shown, the motor drive circuit 1 includes a motor 10, a drive circuit assembly 13 and a power supply 14; wherein, the motor 10 has two terminals, which are the two terminals of the coil (not shown) in the motor 10 , the two terminals are respectively electrically connected to the two driving terminals of the driving circuit assembly 13. The driving circuit assembly 13 itself is a combination of circuit connections, which includes an integrated circuit chip (IC Chip) and some electronic components, etc., and is used for Drive and control the rotation and speed of the motor 10, etc. In addition, the power supply 14 is electrically connected to the drive circuit assembly 13, and is used to provide the power consumption required by the overall motor drive circuit 1; the motor itself has an electrical characteristic, that is, when the motor At the moment of being driven to rotate or the moment of changing the current, due to the sudden increase of the current in the coil of the motor, according to the relationship of the inductance effect, a counter electromotive force will be generated in the coil of the motor to try to balance, which will cause a coil in the coil. Voltage surge 100, please refer to Figure 1B As shown, if the voltage surge 100 is too large, it may cause the integrated circuit chip and some electronic components in the drive circuit assembly 13 to be impacted and damaged, causing the entire motor drive circuit 1 to fail.

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