CN214959342U

CN214959342U - Three-phase bridge double-circuit brush motor control circuit

Info

Publication number: CN214959342U
Application number: CN202120427396.3U
Authority: CN
Inventors: 郭雷雷
Original assignee: Ningbo Yisen Electromechanical Technology Co ltd
Current assignee: Ningbo Yisen Electromechanical Technology Co ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-11-30
Anticipated expiration: 2031-02-26

Abstract

The utility model discloses a three-phase bridge double-circuit has brush motor control circuit, including power module, motor work module, direction control module, power module connects direction control module, and direction control module connects motor work module, power module comprises voltage VCC, and direction control module comprises switch tube K11, switch tube K12, switch tube K13, switch tube K14, switch tube K15, switch tube K16, and motor work module comprises motor M1, motor M2, compares with prior art, the beneficial effects of the utility model are that: the utility model discloses can be on current three-phase bridge control circuit basis, be used for it to drive 2 and have the brush motor, realize the direction and the speed control of 2 motors, not only effectively utilized three-phase bridge control circuit's current resource, greatly practiced thrift product cost simultaneously, reduced product volume.

Description

Three-phase bridge double-circuit brush motor control circuit

Technical Field

The utility model relates to a motor control field specifically is three-phase bridge double-circuit has brush motor control circuit.

Background

Conventional brush motors are generally controlled by an H-bridge, and 4 switching tubes are needed for one H-bridge control circuit, as shown in FIG. 1. When the switching tubes K1 and K4 are closed and K2 and K3 are opened, the motor rotates forwards, and the forward rotation speed of the motor can be adjusted by adjusting the PWM duty ratios of K2 and K3. Similarly, when the switching tubes K2 and K3 are closed and the switching tubes K1 and K4 are opened, the motor rotates reversely, and the reverse rotation speed of the motor can be adjusted by adjusting the PWM duty ratios of K1 and K4.

Conventional brushless motors are generally controlled by a three-phase bridge, and a three-phase bridge control circuit needs 6 switching tubes as shown in fig. 2. The 6 switching tubes (K5, K6, K7, K8, K9 and K10) can drive the brushless motor to rotate forward and backward through a certain time sequence (conventional six-step commutation control, sine wave control and the like), and meanwhile, the motor rotating speed can be adjusted by adjusting the PWM duty ratio of the upper bridge arm (K5, K7 and K9) or the lower bridge arm (K6, K8 and K10).

In some practical applications, it is sometimes desirable to modify some existing three-phase bridge control circuits to drive a brushed motor, and a common method is to suspend one of the bridge arms and use the three-phase bridge as an H-bridge, but only 1-path brushed motor can be driven, which causes waste of resources, cost, space, and the like, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a three-phase bridge double-circuit has brush motor control circuit to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

three-phase bridge double-circuit has brush motor control circuit, including power module, motor work module, direction control module, power module connects direction control module, and direction control module connects motor work module.

As a further aspect of the present invention: the power module is composed of a voltage VCC, the direction control module is composed of a switch tube K11, a switch tube K12, a switch tube K13, a switch tube K14, a switch tube K15 and a switch tube K16, the motor working module is composed of a motor M1 and a motor M2, the voltage VCC is connected with a D pole of the switch tube K11, a D pole of the switch tube K13 and a D pole of the switch tube K15, an S pole of the switch tube K11 is connected with a D pole of the switch tube K12 and a D pole of the motor M1, an S pole of the switch tube K12 is grounded, an S pole of the switch tube K13 is connected with the other end of the motor M1, the motor M2 and a D pole of the switch tube K14, an S pole of the switch tube K14 is grounded, an S pole of the switch tube K15 is connected with the other end of the motor M2, the D pole of the switch tube K16, and an S pole of the switch tube K16 is grounded.

As a further aspect of the present invention: the switching tube K11, the switching tube K12, the switching tube K13, the switching tube K14, the switching tube K15 and the switching tube K16 are all composed of an MOS tube and a diode.

As a further aspect of the present invention: the diodes forming the switch tube are current limiting diodes.

As a further aspect of the present invention: the MOS tube forming the switch tube is an NMOS tube.

As a further aspect of the present invention: the motor M1 and the motor M2 are brush motors.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses can be on current three-phase bridge control circuit basis, be used for it to drive 2 and have the brush motor, realize the direction and the speed control of 2 motors, not only effectively utilized three-phase bridge control circuit's current resource, greatly practiced thrift product cost simultaneously, reduced product volume.

Drawings

Fig. 1 is a circuit diagram of an H-bridge control circuit of a brush motor.

Fig. 2 is a circuit diagram of a brushless motor three-phase bridge control circuit.

Fig. 3 is a circuit diagram of a control circuit of a three-phase bridge two-way brush motor.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

Example 1: referring to fig. 3, the three-phase bridge two-path brush motor control circuit includes a power module for providing power, a direction control module for controlling a rotation direction of a motor, a motor working module for rotating the motor, a direction control module for connecting the power module to the direction control module, and a direction control module connected to the motor working module.

As shown in fig. 3, the power module is composed of a voltage VCC, the direction control module is composed of a switch tube K11, a switch tube K12, a switch tube K13, a switch tube K14, a switch tube K15 and a switch tube K16, the motor operation module is composed of a motor M1 and a motor M2, the voltage VCC is connected with a D pole of the switch tube K11, a D pole of the switch tube K13 and a D pole of the switch tube K15, an S pole of the switch tube K11 is connected with a D pole of the switch tube K12 and a motor M1, an S pole of the switch tube K12 is grounded, an S pole of the switch tube K13 is connected with the other end of the motor M1, a D pole of the motor M2 and a D pole of the switch tube K14, an S pole of the switch tube K14 is grounded, an S pole of the switch tube K15 is connected with the other end of the motor M2 and a D pole of the switch tube K16, and an S pole of the switch tube K16 is grounded.

The utility model discloses a theory of operation is: the circuit comprises 6 switching tubes (K11, K12, K13, K14, K15 and K16) and 2 brush motors (M1 and M2), and a bridge arm (K13 and K14) is shared, so that a three-phase bridge is equivalent to 2H bridges, and the 2 brush motors can be driven simultaneously; when the switching tubes K12, K13 and K16 are turned on, K11, K14 and K15 are turned off, the 2 brushed motors rotate forwards, and the forward rotation speeds of the 2 motors can be respectively controlled by adjusting the PWM duty ratios of K12 and K16. Similarly, when the switching tubes K11, K14 and K15 are turned on, K12, K13 and K16 are turned off, the 2 brush motors reversely rotate, and the reverse rotation speeds of the 2 motors can be respectively controlled by adjusting the PWM duty ratios of K11 and K15.

Embodiment 2, on the basis of embodiment 1, the diode that forms part of the switching tube K11(K12, K13, K14, K15, K16) is a current-limiting diode, so that when the voltage is in the reverse direction, current is enabled to pass through the diode, the NMOS tube is protected from breakdown, and the safety of the circuit is improved.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. Three-phase bridge double-circuit brush motor control circuit, including power module, motor work module, direction control module, its characterized in that, power module connection direction control module, direction control module connection motor work module, power module comprises voltage VCC, direction control module comprises switch tube K11, switch tube K12, switch tube K13, switch tube K14, switch tube K15, switch tube K16, motor work module comprises motor M1, motor M2, voltage VCC connects the D pole of switch tube K11, the D pole of switch tube K13, the D pole of switch tube K15, the S pole of switch tube K11 connects the D pole of switch tube K12, motor M1, the S pole of switch tube K12 is grounded, the S pole of switch tube K13 connects the other end of motor M1, motor M2, the D pole of switch tube K14, the S pole of switch tube K5 is grounded, the S pole of switch tube K15 connects the S pole of motor M2M 5736 The D pole of the switch tube K16 and the S pole of the switch tube K16 are grounded.

2. The control circuit of the three-phase bridge two-way brush motor according to claim 1, wherein the switching tube K11, the switching tube K12, the switching tube K13, the switching tube K14, the switching tube K15 and the switching tube K16 are all composed of a MOS tube and a diode.

3. The control circuit of a three-phase bridge two-way brush motor according to claim 2, wherein the diodes constituting the switching tubes are current limiting diodes.

4. The control circuit of a three-phase bridge two-way brush motor according to claim 2, wherein the MOS transistors constituting the switching transistors are NMOS transistors.

5. The three-phase bridge two-way brush motor control circuit according to claim 1, wherein the motors M1 and M2 are brush motors.