Controllable direct current brushless motor driving module

Abstract

The utility model discloses a controllable direct current brushless motor driving module which comprises a power supply assembly, a three-phase PWM control assembly and a PFC assembly. A driving assembly; the driving assembly comprises a rectification circuit, a PFC, a power supply, an MCU FU6812, a three-phase sine driver, a three-phase AC permanent magnet motor, a signal isolation circuit and a UART communication interface. The rectification circuit is electrically connected with the PFC, the PFC is electrically connected with the power supply, the power supply is electrically connected with the MCU FU6812, the three-phase sine drive is electrically connected with the MCU FU6812, and the three-phase AC permanent magnet motor is electrically connected with the three-phase sine drive. The problems that in an existing fresh air system and an existing dust-free workshop, a plurality of fans are installed inside, a plurality of motors are needed for driving control, more electric energy is consumed when the motors work at the same time, the energy efficiency of the whole dust-free workshop is possibly reduced, each motor needs to be maintained and overhauled regularly, and the working efficiency of the whole dust-free workshop is affected are solved. And a plurality of motors mean the problems of higher maintenance cost and more complicated maintenance work.

Description

Technical Field

[0001] The utility model relates to the technical field of dust-free production workshops and fresh air systems, in particular to a controllable DC brushless motor drive module. Background Art

[0002] The single-phase 220V50HZ AC power supply is converted into a 390V DC power supply through a high power factor and low harmonic distortion PFC circuit. Then, by using Fengqi's FU6812V, the brushless motor is controlled to rotate at any speed within the specified range, and can be started and stopped at any time. No Hall sensor is required, and the angle of the motor is automatically identified to achieve smooth starting.

[0003] However, it still has the following disadvantages in actual use:

[0004] The existing fresh air system and clean room are equipped with many fans, which require multiple motors to drive and control. Multiple motors working at the same time will consume more electricity, which may lead to lower energy efficiency of the entire clean room. In addition, each motor needs regular maintenance and inspection. Multiple motors mean higher maintenance costs and more complicated maintenance work. Utility Model Content

[0005] The purpose of the utility model is to provide a controllable DC brushless motor drive module to solve the problem raised in the above background technology that the existing fresh air system and dust-free workshop are equipped with many fans, which require multiple motors for drive control. Multiple motors working at the same time will consume more electricity, which may lead to reduced energy efficiency of the entire dust-free workshop, and each motor needs regular maintenance and inspection. Multiple motors mean higher maintenance costs and more complicated maintenance work.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a controllable DC brushless motor drive module, comprising:

[0008] Power supply components, three-phase PWM control components, PFC components;

[0009] The power supply assembly includes U1 and T1, U2, Q3, and U1 and T1, U2, Q3 are the core DC-DC circuits, and D5 and D4 are two sets of rectifier output power supplies;

[0010] The three-phase PWM control component includes U6, and pins 3-8 are three-phase PWM outputs with dead-zone control;

[0011] The PFC component includes U3 which can monitor the AC grid voltage waveform through the fourth pin and drive the working current of the boost MOS tube Q1 according to the grid voltage waveform.

[0012] Further, it also includes a drive assembly;

[0013] The drive assembly includes a rectifier circuit, a PFC, a power supply, an MCU FU6812, a three-phase sinusoidal drive, a three-phase AC permanent magnet motor, a signal isolation circuit, and a UART communication interface;

[0014] The rectifier circuit is electrically connected to the PFC, the PFC is electrically connected to the power supply, the power supply is electrically connected to the MCU FU6812, the three-phase sinusoidal drive is electrically connected to the MCU FU6812, the three-phase AC permanent magnet motor is electrically connected to the three-phase sinusoidal drive, the signal isolation circuit is electrically connected to the three-phase AC permanent magnet motor, and the UART communication interface is electrically connected to the signal isolation circuit.

[0015] Furthermore, U4, U7, and U9 inside the driving component are half-bridge gate drivers FD2606S, and Q4-Q11 use IGBT tubes.

[0016] Furthermore, it also includes the control display component;

[0017] The control display component includes a display screen, buttons, MCU, 485 interface, and UART communication interface;

[0018] The UART communication interface is connected to the UART communication interface in the driving component, the display screen is electrically connected to the MCU, the button is electrically connected to the MCU, and the MCU is electrically connected to the 485 interface.

[0019] Furthermore, in the control and display component, J3 is an RS485 communication interface, and J3 is connected to a computer or other device to control and read the working status of the motor.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] 1. This utility model, in fresh air systems, dust-free workshops and other places, after using the module, users can easily control the start and stop, speed of the three-phase AC fan. With our integrated controller, hundreds of fans can be used at the same time, and a computer can be used for centralized control. At the same time, because the product design uses a high PF value and low harmonic distortion solution, a large number of fans can work efficiently in the same power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic diagram of the driver circuit board of the utility model;

[0024] Figure 2 This is a schematic diagram of the control and display circuit of the utility model;

[0025] Figure 3 It is the drive and control display structure diagram of the utility model;

[0026] Figure 4 This is a structural diagram of the connection assembly of the utility model;

[0027] Figure 5 The first circuit schematic diagram and the second circuit schematic diagram of the utility model are shown in FIG.

[0028] Figure 6 This is the third circuit schematic diagram of the utility model;

[0029] Figure 7 This is the fourth circuit schematic diagram of the utility model;

[0030] Figure 8 This is the fifth circuit schematic diagram of the utility model;

[0031] Fig. 9 This is the sixth circuit principle diagram and the seventh circuit principle diagram of the utility model. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0035] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] See also Figure 1-Figure 9As shown, this embodiment is a controllable DC brushless motor drive module, comprising:

[0037] Power supply components, three-phase PWM control components, PFC components;

[0038] The power supply assembly includes U1 and T1, U2, Q3, and U1 and T1, U2, Q3 are the core DC-DC circuits, and D5 and D4 are two sets of rectifier output power supplies;

[0039] like Figure 6 As shown, it is connected to AC220V through CN1, the fuse F1 is used for overcurrent protection, the varistor R1 is used for surge protection, the PTC resistor RY1 limits the starting current, C2, C3, CY1, CY2, and L2 are used for EMI, and the bridge BD1 and C4 are used to rectify and output 310V, which is then supplied to the power supply through L1, D1, and EC1. Figure 7 The DC-DC circuit with U1, T1, U2 and Q3 as the core outputs two sets of power supplies from D5 and D4: 15V, Figure 6 The U3 in the circuit is powered, and the PFC circuit with U3, Q1, D1 and L1 as the core is started, so that EC1 can output 390V stably. At the same time, 15V is supplied to Figure 4 The three-phase PWM signal source with U6 as the core is used for power supply, and the other group is the isolated output 12V, which is completely isolated from AC220V and provides a safe power supply for external control and communication terminals;

[0040] The three-phase PWM control component includes U6, and pins 3-8 are three-phase PWM outputs with dead-zone control;

[0041] like Figure 4 As shown: Pins 3-8 of U6 are three-phase PWM outputs with dead zone control. Through 20KHZ pulse width modulation, the PWM is output to Figure 5 U4, U7, and U9 in the circuit drive IGBT tubes Q4, Q5, Q6, Q7, Q9, and Q11, which are connected to the three-phase permanent magnet motor to generate a three-phase sinusoidal current to drive the motor to rotate;

[0042] The 17th pin of U6 is ADC, which detects the change of NTC resistance. When NTC detects that the temperature of the motherboard exceeds 70 degrees, U6 will start the high temperature alarm. The alarm signal is fed back to the control end through UART, and it will stop working at the same time.

[0043] The 18th pin of U6 is ADC. Figure 6 The voltage divider circuit composed of R26, R27, R29 and R31 detects whether the DC390V power supply voltage is normal. If the power supply is too low, the motor stops and an alarm is sounded. If the voltage is normal, the control circuit is turned on through the 15th pin of U6. Figure 6The relay RT1 in the circuit is closed, allowing the motor's operating current to avoid RY1;

[0044] Pins 18, 19, 20, 21, and 22 of U6 contain operational amplifier circuits to detect the current flowing through the three-phase motor. Figure 4 The current in the sampling resistor RS1 is used to analyze the motor running status and adjust the PWM drive signal in real time. Through internal software calculation, the motor can be controlled to start and run smoothly without an external Hall circuit, and the forward and reverse rotation can be controlled, and the overcurrent protection function is also provided.

[0045] The PFC component includes U3 which can monitor the AC grid voltage waveform through the fourth pin and drive the working current of the boost MOS tube Q1 according to the grid voltage waveform;

[0046] like Figure 6 As shown, U3 can monitor the AC grid voltage waveform through the 4th pin, and drive the working current of the boost MOS tube Q1 according to the grid voltage waveform, so that the entire circuit board works in a state of high power factor and low harmonic distortion, with the power factor exceeding 95% and the harmonic distortion current less than 10%;

[0047] Also included is a drive assembly;

[0048] The drive assembly includes a rectifier circuit, a PFC, a power supply, an MCU FU6812, a three-phase sinusoidal drive, a three-phase AC permanent magnet motor, a signal isolation circuit, and a UART communication interface;

[0049] The rectifier circuit is electrically connected to the PFC, the PFC is electrically connected to the power supply, the power supply is electrically connected to the MCU FU6812, the three-phase sinusoidal drive is electrically connected to the MCU FU6812, the three-phase AC permanent magnet motor is electrically connected to the three-phase sinusoidal drive, the signal isolation circuit is electrically connected to the three-phase AC permanent magnet motor, and the UART communication interface is electrically connected to the signal isolation circuit;

[0050] like Figure 5 As shown: U4, U7, and U9 are half-bridge gate drivers FD2606S, and Q4-Q11 use IGBT tubes with high working efficiency, low heat generation, and stable performance;

[0051] The drive component: can realize the following information through the UART communication interface: start code, start / stop code, forward / reverse rotation data, speed target data, check code information through the received instructions, and will return the following information through the UART communication interface: start code, current speed, motor working current, error code, check code;

[0052] Also includes the control display component;

[0053] The control display component includes a display screen, buttons, MCU, 485 interface, and UART communication interface;

[0054] The UART communication interface is connected to the UART communication interface in the driving component, the display screen is electrically connected to the MCU, the button is electrically connected to the MCU, and the MCU is electrically connected to the 485 interface;

[0055] like Figure 8 J1 and Figure 4 After J1 is connected, the drive part can be controlled. J3 is the RS485 communication interface, which can be used to control and read the working status of the motor online with a computer or other equipment, including speed, temperature, alarm information, etc.

[0056] like Fig. 9 K1, K2, and K3 can modify the motor status. Digital tube U14 can display the motor status, such as speed, temperature, and alarm information. D4, D5, and D6 can intuitively display the fan running, stopping, communication, and alarm status.

[0057] The control component can directly control the operation of the drive unit. Users can control the motor's stop and speed through three buttons. At the same time, they can also use the RS485 interface to directly control hundreds of motors in the dust-free workshop to work according to the predetermined requirements. Through a concise and complete closed-loop control logic, the problem can be solved for customers.

[0058] Working principle: Single-phase 220V50HZ AC power supply is converted into 390V DC power supply through a high power factor and low harmonic distortion PFC circuit. Then, by using Fengqi's FU6812V, the brushless motor is controlled to rotate at any speed within the specified range, and can be started and stopped at any time. No Hall sensor is required, and the angle of the motor is automatically identified to achieve smooth starting.

[0059] The drive module is divided into two parts: control and drive: 1. Drive part: through the UART communication interface, the received instructions can be realized including: start code, start and stop code, forward and reverse data, speed target data, check code information, and the following information will be returned through the UART communication interface: start code, current speed, motor working current, error code, check code;

[0060] 2. Control part: It can directly control the operation of the drive part. Users can control the motor's stop and speed through three buttons. At the same time, it can also use its RS485 interface to directly control hundreds of motors in the dust-free workshop to work according to the predetermined requirements. Through a concise and complete closed-loop control logic, it can solve the problem for customers;

[0061] In fresh air systems, dust-free workshops and other places, after using the module, users can easily control the start and stop, speed of the three-phase AC fan. With our integrated controller, hundreds of fans can be used at the same time, and they can be centrally controlled with a computer. At the same time, because the product design uses high PF value and low harmonic distortion solutions, a large number of fans can work efficiently on the same power grid.

[0062] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A controllable brushless DC motor drive module, characterized in that: include: Power supply components, three-phase PWM control components, PFC components; The power supply assembly includes U1 and T1, U2, Q3, and U1 and T1, U2, Q3 are the core DC-DC circuits, and D5 and D4 are two sets of rectifier output power supplies; The three-phase PWM control component includes U6, and pins 3-8 are three-phase PWM outputs with dead-zone control; The PFC component includes U3 which can monitor the AC grid voltage waveform through the fourth pin and drive the working current of the boost MOS tube Q1 according to the grid voltage waveform.

2. A controllable brushless DC motor drive module according to claim 1, characterized in that: Also included is a drive assembly; The drive assembly includes a rectifier circuit, a PFC, a power supply, an MCU FU6812, a three-phase sinusoidal drive, a three-phase AC permanent magnet motor, a signal isolation circuit, and a UART communication interface; The rectifier circuit is electrically connected to the PFC, the PFC is electrically connected to the power supply, the power supply is electrically connected to the MCU FU6812, the three-phase sinusoidal drive is electrically connected to the MCU FU6812, the three-phase AC permanent magnet motor is electrically connected to the three-phase sinusoidal drive, the signal isolation circuit is electrically connected to the three-phase AC permanent magnet motor, and the UART communication interface is electrically connected to the signal isolation circuit.

3. A controllable DC brushless motor drive module according to claim 2, characterized in that: U4, U7, and U9 inside the driving component are half-bridge gate drivers FD2606S, and Q4-Q11 use IGBT tubes.

4. A controllable DC brushless motor drive module according to claim 3, characterized in that: Also included is a control display assembly; The control display component includes a display screen, buttons, MCU, 485 interface, and UART communication interface; The UART communication interface is connected to the UART communication interface in the driving component, the display screen is electrically connected to the MCU, the button is electrically connected to the MCU, and the MCU is electrically connected to the 485 interface.

5. A controllable brushless DC motor drive module according to claim 4, characterized in that: In the control and display component, J3 is an RS485 communication interface, and J3 is connected with a computer or other equipment to control and read the working status of the motor.

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