Specific direct current motor driving circuit

Abstract

A specific direct current motor driving circuit is characterized by comprising a switch circuit group, a motor driving chip, a photoelectric position indicating switch circuit, a resistance voltage dividing network and a rectification electricity storage system. The control circuit is essentially characterized in that two single-phase motors nested with each other rotate reversely, an outer motor controls on-off and reversing of current when crossing a zero point, an inner motor pushes the outer motor to cross the zero point through meshing of a three-star wheel, and the outer motor pushes the inner motor to cross the zero point through meshing of the three-star wheel until the inner motor reaches the zero point. The beneficial effects of the invention are that the device obtains the induced reverse electromotive force through the resistor voltage dividing network, cooperates with the switching-on and switching-off signals of the photoelectric position indicating switch circuit, precisely and stably displays the position of the zero crossing point, and transmits the position of the zero crossing point to a motor driving chip; a controllable electronic switch is controlled to alternately conduct motor inner and outer windings and a motor driving power supply at equal phase intervals according to a specific sequence, starting is easy and stable, and therefore the motor is driven to rotate. The circuit design is simplified, the reliability is improved, and the cost is saved.

Description

technical field [0001] The present invention relates to the technical field of motor control, in particular to a specific DC motor drive circuit. Background technique [0002] Existing brushless Hall DC motor drivers often require a relatively complex comparator back electromotive force detection circuit externally. The cost is relatively high and the circuit design is complicated, which affects the reliability of the brushless Hall DC motor driver. Contents of the invention [0003] The present invention proposes a specific DC motor drive circuit based on another authorized patent of the inventor of this case, "Double Rotor Planetary Wheel Energy Storage Booster" (patent number: ZL 202021419841.3). [0004] "Double Rotor Planetary Gear Energy Storage Booster Device" (Patent No.: ZL 202021419841.3) innovatively changes the three-phase alternating drive into an alternate drive with dislocation of inner and outer stator windings. The most prominent effect is: the planetary g...

AI Technical Summary

Problems solved by technology

[0002] The existing brushless Hall DC motor driver often needs to set up a more complex comparator back electromotive force detection circuit externally, the cost is relatively high, and the circuit design is complicated, which affects the reliability of the brushless Hall DC motor driver

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