阅读说明：本技术 一种马达驱动电路 (Motor driving circuit ) 是由 李东澈 于 2020-04-09 设计创作，主要内容包括：本发明提出了一种马达驱动电路,包括第一输入端、第二输入端、整流电路、方向判别端和和驱动电路；所述第一输入端和第二输入端与所述整流电路的输入端连接,所述整流电路的输出端上分别连接有所述方向判别端和驱动电路,所述驱动电路的输出端连接有马达,所述马达与所述第一输入端或者所述第二输入端连接,马达一端直接连接一个输入端,而一对串联连接的驱动元件的触点连接马达的另一端,从而,减少驱动元件的数量,减少大小。减少驱动元件的数量以后,马达两端电压降低少,提高马达驱动能力,降低消耗功率,降低发热量,减少个别驱动元件的大小。(The invention provides a motor driving circuit, which comprises a first input end, a second input end, a rectifying circuit, a direction judging end and a driving circuit, wherein the first input end is connected with the second input end; the first input end and the second input end are connected with the input end of the rectifying circuit, the output end of the rectifying circuit is respectively connected with the direction judging end and the driving circuit, the output end of the driving circuit is connected with the motor, the motor is connected with the first input end or the second input end, one end of the motor is directly connected with one input end, and the contact points of the pair of driving elements connected in series are connected with the other end of the motor, so that the number of the driving elements is reduced, and the size is reduced. After the number of driving elements is reduced, the voltage at two ends of the motor is reduced less, the driving capability of the motor is improved, the power consumption is reduced, the heat productivity is reduced, and the size of each driving element is reduced.)

1. A motor driving circuit is characterized by comprising a first input end, a second input end, a rectifying circuit, a direction judging end and a driving circuit; the first input end and the second input end are connected with the input end of the rectifying circuit, the output end of the rectifying circuit is respectively connected with the direction judging end and the driving circuit, the output end of the driving circuit is connected with a motor, and the motor is connected with the first input end or the second input end.

2. The motor drive circuit of claim 1, wherein the drive circuit comprises two high power drive elements in series with each other.

3. The motor drive circuit of claim 2, wherein the high power drive element is a MOS transistor.

4. The motor driving circuit according to claim 1, wherein the direction discrimination terminal is ST288A or ST289AX2 or ST289AX 4.

5. The motor driving circuit according to claim 1, wherein the first input terminal is connected to a ground voltage or a power supply voltage.

6. The motor driving circuit according to claim 1, wherein the second input terminal is connected to a ground voltage or a power supply voltage.

Technical Field

The invention relates to the field of driving circuits, in particular to a motor driving circuit.

Background

The folding of the rear-view mirror of a car is usually realized by a motor, and the prior art has patent publications as follows: KR100900581B1 discloses a folding driving circuit for a vehicle side mirror, which is controlled by a microprocessor, and the circuit of the above-mentioned conventional structure is bulky and therefore not suitable for being installed in a mirror housing, and even if an integrated circuit is used, the volume is large and a large amount of heat is generated because 4 large power driving elements are used.

Disclosure of Invention

In order to solve the technical problem, the invention provides a motor driving circuit, which comprises a first input end, a second input end, a rectifying circuit, a direction judging end and a driving circuit, wherein the first input end is connected with the rectifying circuit; the first input end and the second input end are connected with the input end of the rectifying circuit, the output end of the rectifying circuit is respectively connected with the direction judging end and the driving circuit, the output end of the driving circuit is connected with a motor, and the motor is connected with the first input end or the second input end.

Preferably, the driving circuit comprises two high-power driving elements connected in series with each other.

Preferably, the high-power driving element is an MOS transistor.

Preferably, the direction discrimination end is ST288A or ST289AX2 or ST289AX 4.

Preferably, the first input terminal is connected to a ground voltage or a power supply voltage.

Preferably, the second input terminal is connected to a ground voltage or a power supply voltage.

The motor driving circuit provided by the invention has the following beneficial effects: one end of the motor is directly connected to one input terminal, and the contacts of a pair of driving elements connected in series are connected to the other end of the motor, thereby reducing the number of driving elements and reducing the size. After the number of driving elements is reduced, the voltage at two ends of the motor is reduced less, the driving capability of the motor is improved, the power consumption is reduced, the heat productivity is reduced, and the size of each driving element is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.

FIG. 1 is a functional block diagram of the present invention;

FIG. 2 is a simplified diagram of a driving circuit according to the present invention;

FIG. 3 is a schematic block diagram of embodiment 2;

IN1, a first input terminal; IN2, a second input terminal; 10. a rectifying circuit; 20. a direction judging end; 30. a drive circuit; 31. a first high-power amplifying element; 32. a second high-power amplifying element; 40. a motor.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.