CN217849268U - Direct current has brush motor drive circuit - Google Patents

Direct current has brush motor drive circuit Download PDF

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CN217849268U
CN217849268U CN202221728924.XU CN202221728924U CN217849268U CN 217849268 U CN217849268 U CN 217849268U CN 202221728924 U CN202221728924 U CN 202221728924U CN 217849268 U CN217849268 U CN 217849268U
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circuit
lm5106sd
driving circuit
resistor
driving
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黄康军
杨静
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Guangzhou Sizhi Technology Co ltd
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Guangzhou Sizhi Technology Co ltd
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Abstract

The utility model discloses a direct current has brush motor drive circuit, including controller, upper bridge drive circuit, lower bridge drive circuit and driving voltage sampling circuit, upper bridge drive circuit, lower bridge drive circuit are connected respectively to the controller output, driving voltage sampling circuit is all connected to upper bridge drive circuit, lower bridge drive circuit output, driving voltage sampling circuit output connection director. This application adopts MOSFET as the switch tube, uses LM5106SD chip drive, and two MOSFET of bridge about this chip can drive have the blind spot to set up the function simultaneously, and the blind spot time is adjustable, has stopped the possibility that the upper and lower pipe switched on simultaneously, has high reliability and small advantage. And the motor speed is calculated by collecting the terminal voltage of the motor, so that the speed closed-loop control is realized, the control performance is improved, and the method can be used in speed control occasions.

Description

Direct current has brush motor drive circuit
The technical field is as follows:
the utility model relates to a motor drive circuit technical field especially relates to a direct current has brush motor drive circuit.
Background art:
the direct current brush motor is widely applied to various industries due to the characteristics of simple structure, stable performance, high response speed, large starting torque and the like.
At present, brush control on the market mostly adopts open-loop control, so that the device can not be applied to occasions with higher speed requirements, and partial control also adopts relay drive, so that the device has larger volume, is not beneficial to miniaturization, and is particularly in the industry of electric wheelchairs for low-speed mobility scooter.
The utility model has the following contents:
an object of the utility model is to provide a direct current has brush motor drive circuit to solve the not enough of prior art.
The utility model discloses by following technical scheme implement: the utility model provides a direct current has brush motor drive circuit, includes controller, upper bridge drive circuit, lower bridge drive circuit and driving voltage sampling circuit, upper bridge drive circuit, lower bridge drive circuit are connected respectively to the controller output, upper bridge drive circuit, lower bridge drive circuit output all connect driving voltage sampling circuit, driving voltage sampling circuit output connection director.
Further, the controller adopts a single chip microcomputer.
Further, the upper bridge driving circuit comprises a driving chip LM5106SD driving chip and MOSFET tubes T1 and T3, wherein 8 feet of the LM5106SD driving chip in the upper bridge driving circuit are connected with the controller, 3 feet and 10 feet of the LM5106SD driving chip in the upper bridge driving circuit are respectively connected with the grids of the MOSFET tubes T1 and T3, 4 feet of the LM5106SD driving chip in the upper bridge driving circuit are connected with the source electrode of the MOSFET tube T1 and the drain electrode of the MOSFET tube T3, and the drain electrode of the MOSFET tube T1 and the source electrode of the MOSFET tube T3 are respectively connected with a positive power supply P + and a negative power supply P-;
the lower bridge driving circuit comprises a driving chip LM5106SD driving chip and MOSFET (metal oxide semiconductor field effect transistor) tubes T2 and T4, wherein 8 feet of the LM5106SD driving chip in the lower bridge driving circuit are connected with the controller, 3 feet and 10 feet of the LM5106SD driving chip in the lower bridge driving circuit are respectively connected with grids of the MOSFET tubes T2 and T4, 4 feet of the LM5106SD driving chip in the lower bridge driving circuit are connected with a source electrode of the MOSFET tube T2 and a drain electrode of the MOSFET tube T4, and the drain electrode of the MOSFET tube T2 and the source electrode of the MOSFET tube T4 are respectively connected with a positive power supply P +, a negative power supply P-.
Further, LM5106SD driver chips of the upper bridge driver circuit and the lower bridge driver circuit are also connected with a power supply bootstrap circuit formed by a diode and a capacitor, wherein:
the 2 feet of the LM5106SD driving chip of the upper bridge driving circuit are connected with the cathode of a diode D3, the anode of the diode D3 is connected with a 12V direct-current power supply, and a capacitor C17 is connected between the 2 feet and the 4 feet of the LM5106SD driving chip of the upper bridge driving circuit;
the LM5106SD driving chip 2 foot of the lower bridge driving circuit is connected with the cathode of the diode D4, the anode of the diode D4 is connected with a 12V direct-current power supply, and a capacitor C18 is connected between the LM5106SD driving chip 2 foot and the lower bridge driving circuit 4 foot. .
Further, LM5106SD driver chips of the upper bridge driver circuit and the lower bridge driver circuit are also connected with a dead time setting circuit, wherein: the LM5106SD driving chip 6 pin of the upper bridge driving circuit is grounded through a resistor R29, and the LM5106SD driving chip 6 pin of the lower bridge driving circuit is grounded through a resistor R30.
Further, the driving voltage sampling circuit comprises an upper bridge driving circuit voltage sampling circuit and a lower bridge driving circuit voltage sampling circuit, wherein:
the upper bridge driving circuit voltage sampling circuit comprises resistors R32, R34 and R35, one end of the resistor R32 is connected with a pin M + of a LM5106SD driving chip of the upper bridge driving circuit, the other end of the resistor R32 is connected with one end of the resistor R34, the other end of the resistor R34 is grounded, the connecting end of the resistors R32 and R34 is also connected with one end of a resistor R35, the other end of the resistor R35 is grounded through a capacitor C62, and the other end of the resistor R35 is connected with an ADC pin of a controller;
the lower bridge driving circuit voltage sampling circuit comprises resistors R49, R52 and R53, one end of the resistor R49 is connected with a pin M & lt- & gt of a LM5106SD driving chip of the lower bridge driving circuit, the other end of the resistor R49 is connected with one end of the resistor R52, the other end of the resistor R52 is grounded, the connecting end of the resistors R49 and R52 is also connected with one end of the resistor R53, the other end of the resistor R53 is grounded through a capacitor C63, and the other end of the resistor R53 is connected to an ADC pin of the controller.
The utility model has the advantages that:
this application adopts MOSFET as the switch tube, uses LM5106SD chip drive, and two MOSFET of bridge about this chip can drive have the blind spot to set up the function simultaneously, and the blind spot time is adjustable, has stopped the possibility that the upper and lower pipe switched on simultaneously, has high reliability and small advantage. And the motor speed is calculated by collecting the terminal voltage of the motor, so that the speed closed-loop control is realized, the control performance is improved, and the method can be used in speed control occasions. Positive and negative control and stepless speed regulation can be realized only by two LM5106SD chips and 4 MOS tubes.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a dc brush motor driving circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an upper bridge driving circuit of a dc brush motor driving circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a lower bridge driving circuit of a dc brush motor driving circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an upper bridge driving circuit voltage sampling circuit of a dc brush motor driving circuit according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a lower bridge driving circuit voltage sampling circuit of a dc brush motor driving circuit according to an embodiment of the present invention.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, a dc brush motor driving circuit includes a controller 1, an upper bridge driving circuit 2, a lower bridge driving circuit 3 and a driving voltage sampling circuit 4, wherein an output end of the controller 1 is respectively connected to the upper bridge driving circuit 2 and the lower bridge driving circuit 3, output ends of the upper bridge driving circuit 2 and the lower bridge driving circuit 3 are both connected to the driving voltage sampling circuit 4, and an output end of the driving voltage sampling circuit 4 is connected to the controller 1. Wherein, the controller 1 adopts a singlechip.
As shown in fig. 2 and 3, the upper bridge driving circuit 2 comprises a driving chip LM5106SD driving chip and MOSFET tubes T1 and T3, the LM5106SD driving chip 8 pin of the upper bridge driving circuit 2 is connected with the controller 1, the LM5106SD driving chip 3 pin and 10 pin of the upper bridge driving circuit 2 are respectively connected with the gates of the MOSFET tubes T1 and T3, the LM5106SD driving chip 4 pin of the upper bridge driving circuit 2 is connected with the source of the MOSFET tube T1 and the drain of the MOSFET tube T3, the drain of the MOSFET tube T1 and the source of the MOSFET tube T3 are respectively connected with the positive and negative power supplies P + and P-;
the lower bridge driving circuit 3 comprises a driving chip LM5106SD driving chip, MOSFET tubes T2 and T4, a pin LM5106SD driving chip 8 of the lower bridge driving circuit 3 is connected with the controller 1, pins LM5106SD driving chip 3 and 10 of the lower bridge driving circuit 3 are respectively connected with grids of the MOSFET tubes T2 and T4, a pin LM5106SD driving chip 4 of the lower bridge driving circuit 3 is connected with a source electrode of the MOSFET tube T2 and a drain electrode of the MOSFET tube T4, and a drain electrode of the MOSFET tube T2 and a source electrode of the MOSFET tube T4 are respectively connected with a positive power supply P + and a negative power supply P-.
Simultaneously, go up bridge drive circuit 2, lower bridge drive circuit 3's LM5106SD driver chip still connects the power bootstrap circuit that diode and electric capacity constitute, wherein:
the 2 pin of the LM5106SD driving chip of the upper bridge driving circuit 2 is connected with the cathode of a diode D3, the anode of the diode D3 is connected with a 12V direct-current power supply, and a capacitor C17 is connected between the 2 pin and the 4 pin of the LM5106SD driving chip of the upper bridge driving circuit 2;
the pin 2 of the LM5106SD driving chip of the lower bridge driving circuit 3 is connected with the cathode of a diode D4, the anode of the diode D4 is connected with a 12V direct-current power supply, and a capacitor C18 is connected between the pin 2 and the pin 4 of the LM5106SD driving chip of the lower bridge driving circuit 3.
In addition, LM5106SD driver chips of the upper bridge driving circuit 2 and the lower bridge driving circuit 3 are also connected with a dead time setting circuit, wherein: the LM5106SD driving chip pin 6 of the upper bridge driving circuit 2 is grounded through a resistor R29, and the LM5106SD driving chip pin 6 of the lower bridge driving circuit 3 is grounded through a resistor R30.
As shown in fig. 4 and 5, the driving voltage sampling circuit 4 includes an upper bridge driving circuit voltage sampling circuit and a lower bridge driving circuit voltage sampling circuit, wherein:
the upper bridge driving circuit voltage sampling circuit comprises resistors R32, R34 and R35, one end of the resistor R32 is connected with a pin M + of a LM5106SD driving chip 4 of the upper bridge driving circuit 2, the other end of the resistor R32 is connected with one end of the resistor R34, the other end of the resistor R34 is grounded, the connecting end of the resistors R32 and R34 is also connected with one end of a resistor R35, the other end of the resistor R35 is grounded through a capacitor C62, and the other end of the resistor R35 is connected to an ADC pin of the controller 1;
the lower bridge driving circuit voltage sampling circuit comprises resistors R49, R52 and R53, one end of the resistor R49 is connected with a pin M of a LM5106SD driving chip 4 of the lower bridge driving circuit 3, the other end of the resistor R49 is connected with one end of a resistor R52, the other end of the resistor R52 is grounded, the connecting ends of the resistors R49 and R52 are also connected with one end of a resistor R53, the other end of the resistor R53 is grounded through a capacitor C63, and the other end of the resistor R53 is connected to an ADC pin of the controller 1.
This application adopts MOSFET as the switch tube, uses LM5106SD chip drive, and two MOSFET of bridge about this chip can drive have the blind spot to set up the function simultaneously, and the blind spot time is adjustable, has stopped the possibility that the upper and lower pipe switched on simultaneously, has high reliability and small advantage. And the motor speed is calculated by collecting the terminal voltage of the motor, so that the speed closed-loop control is realized, the control performance is improved, and the method can be used in speed control occasions. Positive and negative control and stepless speed regulation can be realized by only two LM5106SD chips and 4 MOS tubes.
The chip adopts 12V power supply, 8 feet receive the pulse signal that the singlechip sent for PWM signal input, 4 feet and 10 feet are upper and lower bridge drive output respectively, and D3, C17, D4, C18 constitute upper bridge power bootstrap circuit, open for the upper bridge and provide the power, and R29 and R30 are dead time and set for, can adjust according to MOSFET pipe parameter.
R32, R34, R35, C62 and R49, R52, R53, C63 constitute terminal voltage sampling to singlechip ADC mouth for calculating motor speed and realizing closed-loop control, this drive has small, high reliability, high performance advantage can expand the application range of brush motor.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a direct current has brush motor drive circuit, its characterized in that, includes controller (1), upper bridge drive circuit (2), lower bridge drive circuit (3) and driving voltage sampling circuit (4), upper bridge drive circuit (2), lower bridge drive circuit (3) are connected respectively to controller (1) output, driving voltage sampling circuit (4) are all connected to upper bridge drive circuit (2), lower bridge drive circuit (3) output, driving voltage sampling circuit (4) output connection director (1).
2. A dc brushed motor driving circuit according to claim 1, wherein the controller (1) is a single chip microcomputer.
3. The direct current brush motor driving circuit according to claim 1, wherein the upper bridge driving circuit (2) comprises a driving chip LM5106SD driving chip and MOSFET tubes T1 and T3, the LM5106SD driving chip 8 in the upper bridge driving circuit (2) is connected to the controller (1), the LM5106SD driving chip 3 and 10 in the upper bridge driving circuit (2) are respectively connected to the gates of the MOSFET tubes T1 and T3, the LM5106SD driving chip 4 in the upper bridge driving circuit (2) is connected to the source of the MOSFET tube T1 and the drain of the MOSFET tube T3, and the drain of the MOSFET tube T1 and the source of the MOSFET tube T3 are respectively connected to positive and negative power supplies P +, P-;
the lower bridge driving circuit (3) comprises a driving chip LM5106SD driving chip and MOSFET tubes T2 and T4, 8 feet of the LM5106SD driving chip in the lower bridge driving circuit (3) are connected with the controller (1), 3 feet and 10 feet of the LM5106SD driving chip of the lower bridge driving circuit (3) are respectively connected with grids of the MOSFET tubes T2 and T4, 4 feet of the LM5106SD driving chip of the lower bridge driving circuit (3) are connected with a source electrode of the MOSFET tube T2 and a drain electrode of the MOSFET tube T4, and a drain electrode of the MOSFET tube T2 and a source electrode of the MOSFET tube T4 are respectively connected with a positive power supply P + and a negative power supply P-.
4. A dc brush motor driving circuit according to claim 3, wherein the LM5106SD driver chip of the upper bridge driving circuit (2) and the lower bridge driving circuit (3) is further connected to a power bootstrap circuit composed of a diode and a capacitor, wherein:
a 2 pin of a LM5106SD driving chip of the upper bridge driving circuit (2) is connected with the cathode of a diode D3, the anode of the diode D3 is connected with a 12V direct-current power supply, and a capacitor C17 is connected between the 2 pin and a 4 pin of the LM5106SD driving chip of the upper bridge driving circuit (2);
the 2 feet of the LM5106SD driving chip of the lower bridge driving circuit (3) are connected with the cathode of a diode D4, the anode of the diode D4 is connected with a 12V direct-current power supply, and a capacitor C18 is connected between the 2 feet and the 4 feet of the LM5106SD driving chip of the lower bridge driving circuit (3).
5. A dc brush motor driving circuit according to claim 3, wherein the LM5106SD driver chip of the upper bridge driving circuit (2) and the lower bridge driving circuit (3) is further connected with a dead time setting circuit, wherein: the pin of the LM5106SD driving chip 6 of the upper bridge driving circuit (2) is grounded through a resistor R29, and the pin of the LM5106SD driving chip 6 of the lower bridge driving circuit (3) is grounded through a resistor R30.
6. A dc brushed motor driving circuit according to claim 1, wherein the driving voltage sampling circuit (4) comprises an upper bridge driving circuit voltage sampling circuit and a lower bridge driving circuit voltage sampling circuit, wherein:
the upper bridge driving circuit voltage sampling circuit comprises resistors R32, R34 and R35, one end of the resistor R32 is connected with a pin M + of a LM5106SD driving chip of the upper bridge driving circuit (2), the other end of the resistor R32 is connected with one end of the resistor R34, the other end of the resistor R34 is grounded, the connecting end of the resistors R32 and R34 is also connected with one end of the resistor R35, the other end of the resistor R35 is grounded through a capacitor C62, and the other end of the resistor R35 is connected to an ADC pin of the controller (1);
the lower bridge driving circuit voltage sampling circuit comprises resistors R49, R52 and R53, one end of the resistor R49 is connected with a pin M-4 of an LM5106SD driving chip of the lower bridge driving circuit (3), the other end of the resistor R49 is connected with one end of the resistor R52, the other end of the resistor R52 is grounded, the connecting ends of the resistors R49 and R52 are also connected with one end of the resistor R53, the other end of the resistor R53 is grounded through a capacitor C63, and the other end of the resistor R53 is connected to an ADC pin of the controller (1).
CN202221728924.XU 2022-07-04 2022-07-04 Direct current has brush motor drive circuit Active CN217849268U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202221728924.XU CN217849268U (en) 2022-07-04 2022-07-04 Direct current has brush motor drive circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202221728924.XU CN217849268U (en) 2022-07-04 2022-07-04 Direct current has brush motor drive circuit

Publications (1)

Publication Number Publication Date
CN217849268U true CN217849268U (en) 2022-11-18

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CN202221728924.XU Active CN217849268U (en) 2022-07-04 2022-07-04 Direct current has brush motor drive circuit

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