CN215010090U

CN215010090U - Motor drive circuit of dispensing system

Info

Publication number: CN215010090U
Application number: CN202120925822.6U
Authority: CN
Inventors: 王贵
Original assignee: Shenzhen Axis Piezoelectric Technology Co ltd
Current assignee: Shenzhen Axis Piezoelectric Technology Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-12-03
Anticipated expiration: 2031-04-30

Abstract

The utility model discloses a motor drive circuit of system is glued to point relates to the point and glues technical field, including first signal control end, first half-bridge drive circuit, second signal control end, second half-bridge drive circuit, MOS pipe Q1, MOS pipe Q2, MOS pipe Q3, MOS pipe Q4 and motor; the first signal control end is connected to the first half-bridge driving circuit, the second signal control end is connected to the second half-bridge driving circuit, and the first half-bridge driving circuit and the second half-bridge driving circuit are respectively provided with two signal output ends; the drain of the MOS transistor Q1 is connected to the drain of the MOS transistor Q2 and to the driving power VCC 2; the source electrode of the MOS tube Q1 is electrically connected with the drain electrode of the MOS tube Q3 to form a first power supply end, the source electrode of the MOS tube Q2 is electrically connected with the drain electrode of the MOS tube Q4 to form a second power supply end, and the motor is electrically connected between the first power supply end and the second power supply end; the utility model has the advantages that: based on the on-off control of a plurality of MOS tubes, the forward rotation and the reverse rotation of the motor are controlled.

Description

Motor drive circuit of dispensing system

Technical Field

The utility model relates to a glue technical field, more specifically the utility model relates to a motor drive circuit of system is glued to point.

Background

The direct current motor is used for controlling and moving corresponding components in the intelligent dispensing system. Especially, the control of the displacement in a precise dispensing system is stricter, and the precise dispensing operation can be performed only by controlling the corresponding dispensing component. Meanwhile, the internal forming module of the dispensing system is complex, strong interference exists frequently, and the requirements on the anti-interference performance and the stability of an internal circuit are high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides a motor drive circuit of system is glued to point based on the on-off control to a plurality of MOS pipes, realizes the control to motor corotation and reversal.

The utility model provides a technical scheme that its technical problem adopted is: the motor driving circuit of a kind of point glue system, its improvement lies in, including the first signal control end, first half bridge driving circuit, second signal control end, second half bridge driving circuit, MOS tube Q1, MOS tube Q2, MOS tube Q3, MOS tube Q4 and motor;

the first signal control end is connected to the first half-bridge driving circuit, the second signal control end is connected to the second half-bridge driving circuit, and the first half-bridge driving circuit and the second half-bridge driving circuit are respectively provided with two signal output ends; the grid electrode of the MOS transistor Q1 and the grid electrode of the MOS transistor Q3 are respectively connected with two signal output ends of the first half-bridge driving circuit, and the grid electrode of the MOS transistor Q2 and the grid electrode of the MOS transistor Q4 are respectively connected with two signal output ends of the second half-bridge driving circuit;

the drain electrode of the MOS transistor Q1 is connected with the drain electrode of the MOS transistor Q2 and is connected to a driving power supply VCC 2; the source of MOS pipe Q1 and the drain of MOS pipe Q3 electric connection to form first supply terminal, the source of MOS pipe Q2 and the drain of MOS pipe Q4 electric connection to form the second supply terminal, motor electric connection between first supply terminal and second supply terminal.

In the above structure, the first half-bridge driving circuit and the second half-bridge driving circuit both have power output terminals, and the power output terminal of the first half-bridge driving circuit is electrically connected to the first power supply terminal, and the power output terminal of the second half-bridge driving circuit is electrically connected to the second power supply terminal.

In the above structure, the first half-bridge driving circuit and the second half-bridge driving circuit have the same structure; the first half-bridge circuit comprises a chip U2, wherein the chip U2 is provided with a HIN pin, an SDN pin, an HO pin, an LO pin and a VS pin;

the first control signal terminal comprises an output signal terminal CTR-AH and a state control signal terminal CTR-AL, the output signal terminal CTR-AH is connected to an HIN pin, the state control signal terminal CTR-AL is connected to an SDN pin, an HO pin is connected to the grid of an MOS tube Q1, and the LO pin is connected to the grid of an MOS tube Q3;

when signals are input into the HIN pin, the level state of the SDN pin controls the output states of the HO pin and the LO pin; when the SDN pin is at a high level, the level of the HO pin is the same as that of the HIN pin, and the level of the LO pin is opposite to that of the HIN pin; when the SDN pin is at a low level, the level of the HO pin is opposite to that of the HIN pin, and the level of the LO pin is the same as that of the HIN pin;

and the VS pin of the chip U2 is a power supply output end.

In the above structure, the chip U2 further has a VCC pin and a VB pin;

the VCC pin is connected to a power supply terminal VCC1, a diode D2 is arranged between the VCC pin and the VB pin, and the positive terminal VCC pin of the diode D2 is connected;

and a capacitor C2 and a capacitor C4 which are connected in parallel are arranged between the VB pin and the VS pin.

In the above structure, the motor driving circuit of the dispensing system further includes a MOS transistor protection circuit, and the MOS transistor protection circuit includes a schottky diode DZ1, a schottky diode DZ2, a schottky diode DZ3, and a schottky diode DZ 4;

the cathode ends of the Schottky diode DZ1 and the Schottky diode DZ2 are both connected to a driving power supply VCC 2;

the positive end of the Schottky diode DZ1 is connected with the negative end of the Schottky diode DZ3 and then is connected to a first power supply end; the positive end of the Schottky diode DZ2 is connected with the negative end of the Schottky diode DZ4 and then is connected to a second power supply end;

the positive terminals of the schottky diode DZ3 and the schottky diode DZ4 are both connected to the ground terminal.

In the above configuration, a sampling resistor R10 is provided between the source of the MOS transistor Q3 and the ground, and a sampling resistor R9 is provided between the source of the MOS transistor Q4 and the ground.

The utility model has the advantages that: the output signals CTR-AH, CTR-AL and CTR-BH of the main control MCU and the output signal states of the chip U1 and the chip U2 are controlled by the CTR-BL, so that the conduction states of MOS tubes Q1, Q2, Q3 and Q4 are controlled, and the forward rotation and the reverse rotation of the motor are controlled. The forward rotation and reverse rotation of the motor are controlled by the MOS switch control, so that the related parts are driven to act;

drawings

Fig. 1 is a schematic structural diagram of a motor driving circuit of a dispensing system of the present invention.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The utility model discloses each technical feature in the creation can the interactive combination under the prerequisite that does not contradict conflict each other.

Referring to fig. 1, the present invention discloses a motor driving circuit of a dispensing system, specifically, the motor driving circuit includes a first signal control terminal 10, a first half-bridge driving circuit 30, a second signal control terminal 20, a second half-bridge driving circuit 40, a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4 and a motor; the first signal control terminal 10 and the second signal control terminal 20 are both two sets of control signals output by the main control MCU, in this embodiment, the first signal control terminal includes an output signal terminal CTR-AH and a status control signal terminal CTR-AL, and similarly, the second signal control terminal 20 includes an output signal terminal CTR-BH and a status signal terminal CTR-BL. The first half-bridge driving circuit 30 and the second half-bridge driving circuit 40 are respectively provided with two signal output ends, the grid electrode of the MOS tube Q1 and the grid electrode of the MOS tube Q3 are respectively connected with the two signal output ends of the first half-bridge driving circuit 30, and the grid electrode of the MOS tube Q2 and the grid electrode of the MOS tube Q4 are respectively connected with the two signal output ends of the second half-bridge driving circuit 40; the drain electrode of the MOS transistor Q1 is connected with the drain electrode of the MOS transistor Q2 and is connected to a driving power supply VCC 2; the source of the MOS transistor Q1 is electrically connected to the drain of the MOS transistor Q3 to form a first power supply terminal 301, the source of the MOS transistor Q2 is electrically connected to the drain of the MOS transistor Q4 to form a second power supply terminal 402, and the motor is electrically connected between the first power supply terminal 301 and the second power supply terminal 402.

Further, the first signal control terminal 10 is connected to the first half-bridge driver circuit 30, the second signal control terminal 20 is connected to the second half-bridge driver circuit 40, the basic circuits of the first half-bridge driver circuit 30 and the second half-bridge driver circuit 40 are the same, wherein the first half-bridge driver circuit 30 includes a half-bridge driver IC, which is a chip U2 in this embodiment, as shown in fig. 1, the chip U2 has a HIN pin, an SDN pin, an HO pin, an LO pin, and a VS pin; an output signal terminal CTR-AH is connected to an HIN pin, a state control signal terminal CTR-AL is connected to an SDN pin, an HO pin is connected to the grid of an MOS tube Q1, and an LO pin is connected to the grid of an MOS tube Q3; likewise, the second half-bridge driver circuit 40 includes a chip U1, and the chip U1 also has a HIN pin, an SDN pin, an HO pin, an LO pin, and a VS pin; the output signal end CTR-BH is connected to an HIN pin, the state control signal end CTR-BL is connected to an SDN pin, the HO pin is connected to the grid electrode of the MOS tube Q2, and the LO pin is connected to the grid electrode of the MOS tube Q4. In the scheme, a resistor R4 is arranged between an output signal end CTR-AH and an HIN pin, a resistor R5 is arranged between a state control signal end CTR-AL and an SDN pin, a resistor R3 is arranged between an output signal end CTR-BH and an HIN pin, a resistor R6 is arranged between the state control signal end CTR-BL and the SDN pin, and the resistor R3, the resistor R4, the resistor R5 and the resistor R6 play a role in current limiting.

When signals are input into the HIN pin, the level state of the SDN pin controls the output states of the HO pin and the LO pin; when the SDN pin is at a high level, the level of the HO pin is the same as that of the HIN pin, and the level of the LO pin is opposite to that of the HIN pin; when the SDN pin is at a low level, the level of the HO pin is opposite to that of the HIN pin, and the level of the LO pin is the same as that of the HIN pin.

In the above embodiment, the first half-bridge driving circuit 30 and the second half-bridge driving circuit 40 both have power output terminals, and the power output terminal of the first half-bridge driving circuit 30 is electrically connected to the first power supply terminal 301, and the power output terminal of the second half-bridge driving circuit 40 is electrically connected to the second power supply terminal 402; in this embodiment, the VS pin of the chip U1 and the VS pin of the chip U2 are power output terminals.

With continued reference to fig. 1, the chip U2 further has a VCC pin and a VB pin; the VCC pin is connected to a power supply terminal VCC1, a diode D2 is arranged between the VCC pin and the VB pin, and the positive terminal VCC pin of the diode D2 is connected; and a capacitor C2 and a capacitor C4 which are connected in parallel are arranged between the VB pin and the VS pin. Since the peripheral structure of the chip U1 is completely the same as that of the chip U2, further description is omitted in this embodiment. Referring to fig. 1, a power source VCC1 supplies power to a chip U1 and a chip U2, and diodes D1 and D2 play a role in preventing reverse conduction and prevent a pumped voltage from damaging a VCC1 power source; the capacitors C1, C2, C3 and C4 have a pumping effect and a pumping voltage increasing effect for floating drive, and the resistors R1, R2, R7 and R8 are driving resistors of MOS (metal oxide semiconductor) tubes respectively and have a current limiting effect.

In the circuit structure, the MOS transistor Q1, the MOS transistor Q2, the MOS transistor Q3 and the MOS transistor Q4 are key devices for controlling the forward rotation and the reverse rotation of the motor; the power supply VCC2 provides a driving power supply, and when the MOS transistor Q1 and the MOS transistor Q4 are switched on and the MOS transistor Q2 and the MOS transistor Q3 are switched off, the motor rotates forwards; when the MOS transistor Q1 and the MOS transistor Q4 are disconnected and the MOS transistor Q2 and the MOS transistor Q3 are connected, the motor rotates reversely. The MOS transistor Q1 and the MOS transistor Q3 cannot be turned on simultaneously, and the MOS transistor Q2 and the MOS transistor Q4 cannot be turned on simultaneously.

In addition, in this embodiment, the motor driving circuit of the dispensing system further includes a MOS transistor protection circuit 50, where the MOS transistor protection circuit 50 includes a schottky diode DZ1, a schottky diode DZ2, a schottky diode DZ3, and a schottky diode DZ 4; the cathode ends of the Schottky diode DZ1 and the Schottky diode DZ2 are both connected to a driving power supply VCC 2; the positive end of the Schottky diode DZ1 is connected with the negative end of the Schottky diode DZ3 and then is connected to the first power supply end 301; the positive end of the schottky diode DZ2 is connected to the negative end of the schottky diode DZ4 and then to the second power supply terminal 402; the positive terminals of the schottky diode DZ3 and the schottky diode DZ4 are both connected to the ground terminal. The Schottky diodes DZ1, DZ2, DZ3 and DZ4 protect the MOS transistor, and when the magnetic motor is switched on and off, high voltage is generated to easily damage the MOS transistor; the voltage amplitude is limited between VCC2 and GND by the 4 Schottky diodes, thereby protecting the MOS transistor from damage.

A sampling resistor R10 is arranged between the source electrode of the MOS transistor Q3 and the grounding end, a sampling resistor R9 is arranged between the source electrode of the MOS transistor Q4 and the grounding end, a port ADC2 is connected to the source electrode of the MOS transistor Q3, a port ADC1 is connected to the source electrode of the MOS transistor Q4, and the ADC sampling module judges whether the current reaches a protection threshold value through sampling values of the ADC1 and the ADC2, and performs protection operation when the current reaches the threshold value.

The utility model discloses an foretell structure, through master control MCU output signal CTR-AH, CTR-AL, CTR-BH and CTR-BL control chip U1 and chip U2's output signal state to control MOS pipe Q1, Q2, Q3, Q4's the on-state, carry out corotation and reversal control to the motor. The forward rotation and reverse rotation of the motor are controlled by the MOS switch control, so that the related parts are driven to act; the MOS is used as the switch control of the motor, so that the rapid motor action control can be realized, and more importantly, the service life of the use times is not limited, and theoretically, the MOS can be used for infinite times; meanwhile, when the switch is operated, the vibration phenomenon does not occur, and the vibration phenomenon can not occur in the control of the motor.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims

1. A motor driving circuit of a dispensing system is characterized by comprising a first signal control end, a first half-bridge driving circuit, a second signal control end, a second half-bridge driving circuit, an MOS tube Q1, an MOS tube Q2, an MOS tube Q3, an MOS tube Q4 and a motor;

2. The motor driving circuit of a dispensing system of claim 1, wherein the first half-bridge driving circuit and the second half-bridge driving circuit have power output terminals, and the power output terminal of the first half-bridge driving circuit is electrically connected to the first power terminal, and the power output terminal of the second half-bridge driving circuit is electrically connected to the second power terminal.

3. The motor driving circuit of a dispensing system of claim 2, wherein the first half-bridge driving circuit and the second half-bridge driving circuit have the same structure; the first half-bridge circuit comprises a chip U2, wherein the chip U2 is provided with a HIN pin, an SDN pin, an HO pin, an LO pin and a VS pin;

the first signal control terminal comprises an output signal terminal CTR-AH and a state control signal terminal CTR-AL, the output signal terminal CTR-AH is connected to an HIN pin, the state control signal terminal CTR-AL is connected to an SDN pin, an HO pin is connected to the grid of an MOS tube Q1, and the LO pin is connected to the grid of an MOS tube Q3;

and the VS pin of the chip U2 is a power supply output end.

4. The motor driving circuit of a dispensing system of claim 3, wherein said chip U2 further has a VCC pin and a VB pin;

5. The motor driving circuit of a dispensing system of claim 1, wherein the motor driving circuit of a dispensing system further comprises a MOS transistor protection circuit, the MOS transistor protection circuit comprising a schottky diode DZ1, a schottky diode DZ2, a schottky diode DZ3, and a schottky diode DZ 4;

6. The motor driving circuit of a dispensing system of claim 1, wherein a sampling resistor R10 is disposed between the source of the MOS transistor Q3 and the ground, and a sampling resistor R9 is disposed between the source of the MOS transistor Q4 and the ground.