Double-Hall motor driving board

Abstract

The utility model discloses a double-Hall motor drive board, the drive board is arranged adjacent to a motor stator coil, the drive board comprises a single-chip microcomputer U1, vector control codes are recorded in the single-chip microcomputer U1, and the single-chip microcomputer U1 receives signals and outputs control signals; the switching device comprises a complementary field effect transistor Q1, a complementary field effect transistor Q2 and a complementary field effect transistor Q3, and the complementary field effect transistor Q1, the complementary field effect transistor Q2 and the complementary field effect transistor Q3 are connected in parallel to form a three-phase inverter bridge output current driving motor; the first Hall sensor is arranged on the driving board, the power supply end of the first Hall sensor is connected with a power supply VCC, and the output end of the first Hall sensor is connected with the single chip microcomputer U1; and the second Hall sensor is arranged on the driving board, the power supply end of the second Hall sensor is connected with the power supply VCC, and the output end of the second Hall sensor is connected with the single chip microcomputer U1.

Description

Technical Field

[0001] The utility model relates to the technical field of motor control, in particular to a dual-Hall motor drive board. Background Art

[0002] A brushless DC motor is a motor without brushes and a commutator. It uses a transistor commutation circuit instead of brushes and a commutator to always apply force to the rotor in the tangential direction to keep the rotor rotating.

[0003] Existing brushless DC motors typically use three Hall sensors to determine the rotor's rotational position, which is then fed into a control chip to operate the motor. For example, Chinese patent publication number CN202334236U discloses a brushless DC motor with integrated Hall sensors. A controller is fixed to the rear end of the brushless DC motor, and Hall sensors are mounted on the outer surface of the controller's control board. The brushless DC motor is connected to the driver board via phase lines and a connecting cable. This integrates the Hall position sensors and brushless motor control circuitry onto a single PCB control board.

[0004] The drive board of the brushless DC motor can be further improved and optimized. Utility Model Content

[0005] The utility model aims to provide a dual-Hall motor driving board. Two Hall sensors are arranged on the driving board to locate the position of the motor rotor and realize the operation of the motor.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a dual-Hall motor drive board, the output ends of which are respectively connected to the U, V, and W phases of the motor, outputting current to drive the motor to rotate, the drive board being arranged adjacent to the motor stator coil, and the drive board comprising:

[0007] A single-chip microcomputer U1, wherein a vector control code is recorded in the single-chip microcomputer U1, and the single-chip microcomputer U1 receives a signal and outputs a control signal;

[0008] A switching device, comprising a complementary field effect transistor Q1, a complementary field effect transistor Q2, and a complementary field effect transistor Q3, wherein the complementary field effect transistors Q1, Q2, and Q3 are connected in parallel to form a three-phase inverter bridge to output current to drive the motor;

[0009] A first Hall sensor is provided on the driver board, a power supply end of the first Hall sensor is connected to a power supply VCC, and an output end of the first Hall sensor is connected to the single-chip microcomputer U1;

[0010] The second Hall sensor is provided on the driving board, the power supply end of the second Hall sensor is connected to the power supply VCC, and the output end of the second Hall sensor is connected to the single chip microcomputer U1.

[0011] The present invention is further configured as follows: the first input points of the complementary field effect transistors Q1, Q2, and Q3 are respectively connected to the power supply VBUS, the second input points of the complementary field effect transistors Q1, Q2, and Q3 are respectively connected to the ground point GND, and a capacitor is connected in parallel between the complementary field effect transistors Q1, Q2, and Q3.

[0012] The present invention is further configured as follows: the drains D1 and D2 of the complementary field effect transistor Q1 serve as the output terminal P1 , and the output terminal P1 is connected to the U phase of the DC motor.

[0013] The present invention is further configured as follows: the base G1 of the complementary field effect transistor Q1 inputs a low level signal LOU, and the base G2 of the complementary field effect transistor Q1 inputs a high level signal HOU.

[0014] The present invention is further configured as follows: a resistor R5 and a capacitor C5 are connected in parallel between the source S1 and the base G1 of the complementary field effect transistor Q1 , and a resistor R2 and a capacitor C2 are connected in parallel between the source S2 and the base G2 of the complementary field effect transistor Q1 .

[0015] The present invention is further configured as follows: the complementary field effect transistors Q1, Q2, and Q3 are all of model IM4712 / PDFN-8 / 5X6.

[0016] The present invention is further configured as follows: the single chip microcomputer U1 is of model IU6332 and has 20 pins.

[0017] The present invention is further configured as follows: the output signal speed regulation of the single chip microcomputer U1 is VSP speed regulation or PWM speed regulation.

[0018] The present invention is further configured as follows: the power supply end of the first Hall sensor and the grounding point are connected to capacitor C28, the power supply end of the first Hall sensor and the grounding point are connected to capacitor C27, the power supply end of the second Hall sensor and the grounding point are connected to capacitor C30, and the power supply end of the first Hall sensor and the grounding point are connected to capacitor C29.

[0019] Compared with the existing technology, the dual Hall motor driver board of the utility model optimizes the number of Hall sensors to two, simplifies the control circuit on the driver board, reduces the heat loss of the control circuit, reduces the overall cost, and saves material usage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural block diagram of a dual-Hall motor driver board of the utility model.

[0021] Figure 2This is a circuit diagram of a switch device in a dual-Hall motor drive board of the utility model.

[0022] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0023] Figure 4 This is a circuit diagram of a driver chip in a dual-Hall motor driver board of the utility model. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] like Figure 1-4 As shown, this embodiment discloses a dual Hall motor drive board, which is arranged adjacent to the motor stator coil. A switching device and a driving chip are provided on the drive board. The output ends of the switching device are electrically connected to the U, V, and W three-phase coils of the motor, respectively, for outputting current to the stator coil winding of the motor, so that the stator coil winding generates magnetic force to drive the rotor to rotate.

[0026] like Figure 2 As shown, the switching device is composed of three complementary field effect transistors Q1, Q2, and Q3 to form a three-phase inverter bridge, each having an upper bridge arm and a lower bridge arm. The first input points of the complementary field effect transistors Q1, Q2, and Q3 are respectively connected to the power supply VBUS, and the output points of the complementary field effect transistors Q1, Q2, and Q3 are respectively used as output terminals for connecting to the U phase, V phase, and W phase of the DC motor, respectively. The second input points of the complementary field effect transistors Q1, Q2, and Q3 are respectively connected to the common point ISN1, and the common point ISN1 is connected to the ground point GND. Several resistors are connected between the common point ISN1 and the ground point GND. The resistance value of 0 can enhance the anti-interference performance in a high-frequency environment; a capacitor is connected in parallel between the complementary field effect transistors Q1, Q2, and Q3.

[0027] like Figure 3As shown, in this example, the drains D1 and D2 of the complementary field effect transistor Q1 serve as the output terminal P1, and the output terminal P1 is connected to the U phase of the motor; the base G1 of the complementary field effect transistor Q1 serves as the control terminal to input the low-level signal LOU output by the single-chip microcomputer to turn on the complementary field effect transistor Q1, and the base G2 of the complementary field effect transistor Q1 serves as the control terminal to input the high-level signal HOU output by the single-chip microcomputer to turn on the complementary field effect transistor Q1, wherein the input single-chip microcomputer control signal is PWM, which can be used for speed regulation; the source S1 of the complementary field effect transistor Q1 is connected to the common point ISN1, and the common point ISN1 is connected to the ground point GND. Resistors R14 and R18 are connected between the common point ISN1 and the ground point GND, and both resistors R14 and R18 are zero-resistance resistors; a resistor R5 and a capacitor C5 are connected in parallel between the source S1 and the base G1, a resistor R2 and a capacitor C2 are connected in parallel between the source S2 and the base G2, and a capacitor C8 is connected in parallel to the complementary field effect transistor Q1.

[0028] In this example, the complementary field-effect transistors Q1, Q2, and Q3 are all IM4712 / PDFN-8 / 5X6.

[0029] In this example, the circuit configuration of complementary field-effect transistors Q2 and Q3 is the same as that of Q1 and will not be further described. Complementary field-effect transistors Q1, Q2, and Q3 form a three-phase inverter bridge, forming a three-phase inverter circuit. The upper and lower bridge arms of the same phase alternately conduct electricity, causing the motor winding to conduct current. The current conducted in the winding generates a magnetic field that repel the permanent magnet and drives the rotor to rotate. The conduction angle of each phase differs by 120°. At the same time, the bridge arms of the three-phase inverter bridge formed by complementary field-effect transistors Q1, Q2, and Q3 are simultaneously conductive, and switching between the upper and lower bridge arms of the same phase occurs during commutation.

[0030] In this embodiment, the single-chip microcomputer U1 is recorded with vector control code. The single-chip microcomputer U1 receives the position signal of the Hall sensor and outputs a control signal to the three-phase inverter bridge, so that the three-phase inverter bridge outputs current to drive the DC motor to rotate.

[0031] In this embodiment, the driving chip is a single chip microcomputer U1, the single chip microcomputer U1 model is IU6332, and IU6332 has 20 pins, such as Figure 4As shown, pin 17 is the power pin of microcontroller U1, connected to a 5V DC voltage. Pin 18 is the negative pin of microcontroller U1, connected to ground. Pin 4 is connected to interface P4 for program burning. Pins 1, 19, and 20 serve as input pins. Pins 19 and 20 are connected to Hall effect sensors, respectively. Pin 1 is left floating. Pins 10, 11, 12, 13, 14, and 15 serve as output pins for outputting control signals. Pins 10, 11, and 12 output constant-high signals, while pins 13, 14, and 15 output constant-low signals. Pins 5 and 16 input and output signals for DC motor speed control. Microcontroller U1 can be used for VSP or PWM speed control. Changing the speed control mode requires changing the values ​​of resistor R22 and capacitor C16.

[0032] In this embodiment, the Hall sensor includes a first Hall sensor and a second Hall sensor. The first Hall sensor is arranged on the driver board. The power supply end of the first Hall sensor is connected to the power supply VCC, the output end of the first Hall sensor is connected to pin 20 of the microcontroller, the ground end of the first Hall sensor is connected to the ground point, the power supply end of the first Hall sensor and the ground point are connected to capacitor C28, and the power supply end of the first Hall sensor and the ground point are connected to capacitor C27.

[0033] The second Hall sensor is arranged on the driving board, the power supply end of the second Hall sensor is connected to the power supply VCC, the output end of the second Hall sensor is connected to pin 19 of the single-chip computer, the ground end of the second Hall sensor is connected to the ground point, the power supply end of the second Hall sensor and the ground point are connected to capacitor C30, and the power supply end of the first Hall sensor and the ground point are connected to capacitor C29.

[0034] The first Hall sensor and the second Hall sensor collect the rotor position signal and send it to the single-chip microcomputer U1, which outputs the signal to the three-phase inverter bridge to drive the motor to rotate.

[0035] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. A dual-Hall motor driver board, the output terminals of which are connected to the U, V, and W phases of the motor respectively, outputting current to drive the motor to rotate, characterized by: The drive plate is arranged adjacent to the motor stator coil, and the drive plate includes: A single-chip microcomputer U1, wherein a vector control code is recorded in the single-chip microcomputer U1, and the single-chip microcomputer U1 receives a signal and outputs a control signal; A switching device, comprising a complementary field effect transistor Q1, a complementary field effect transistor Q2, and a complementary field effect transistor Q3, wherein the complementary field effect transistors Q1, Q2, and Q3 are connected in parallel to form a three-phase inverter bridge to output current to drive a DC motor; A first Hall sensor is provided on the driver board, a power supply end of the first Hall sensor is connected to a power supply VCC, and an output end of the first Hall sensor is connected to the single-chip microcomputer U1; The second Hall sensor is provided on the driving board, the power supply end of the second Hall sensor is connected to the power supply VCC, and the output end of the second Hall sensor is connected to the single chip microcomputer U1.

2. The dual Hall motor drive board according to claim 1, characterized in that: The first input points of the complementary field effect transistors Q1, Q2, and Q3 are respectively connected to the power supply VBUS, the second input points of the complementary field effect transistors Q1, Q2, and Q3 are respectively connected to the ground point GND, and a capacitor is connected in parallel between the complementary field effect transistors Q1, Q2, and Q3.

3. The dual Hall motor drive board according to claim 2, characterized in that: The drains D1 and D2 of the complementary field effect transistor Q1 serve as an output terminal P1 , and the output terminal P1 is connected to the U phase of the motor.

4. The dual Hall motor drive board according to claim 3, characterized in that: The base G1 of the complementary field effect transistor Q1 inputs a low level signal LOU, and the base G2 of the complementary field effect transistor Q1 inputs a high level signal HOU.

5. The dual Hall motor drive board according to claim 4, characterized in that: A resistor R5 and a capacitor C5 are connected in parallel between the source S1 and the base G1 of the complementary field effect transistor Q1 , and a resistor R2 and a capacitor C2 are connected in parallel between the source S2 and the base G2 of the complementary field effect transistor Q1 .

6. The dual Hall motor drive board according to claim 1, characterized in that: The complementary field effect transistors Q1, Q2, and Q3 are all of model IM4712 / PDFN-8 / 5X6.

7. The dual Hall motor drive board according to claim 1, characterized in that: The model of the single chip microcomputer U1 is IU6332, and the single chip microcomputer U1 has 20 pins.

8. The dual Hall motor drive board according to claim 7, characterized in that: The output signal speed regulation of the single chip microcomputer U1 is VSP speed regulation or PWM speed regulation.

9. The dual Hall motor drive board according to claim 1, characterized in that: The power supply terminal of the first Hall sensor and the ground point are connected to capacitor C28, the power supply terminal of the first Hall sensor and the ground point are connected to capacitor C27, the power supply terminal of the second Hall sensor and the ground point are connected to capacitor C30, and the power supply terminal of the first Hall sensor and the ground point are connected to capacitor C29.

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