Non-isolated low-power EC three-phase motor control system

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a non-isolated low-power EC three-phase motor control system. The AC-DC BUCK control circuit is connected with the motor driving control module, the motor driving control module is respectively connected with the motor rotating speed signal module, the motor speed regulation signal module, the motor phase line output port and the burning port, and the motor rotating speed signal module, the motor phase line output port and the motor speed regulation signal module are all connected with the motor. According to the utility model, problems existing in shaded pole motor application can be effectively solved.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a non-isolated low-power EC three-phase motor control system. Background Technology

[0002] The cooling fans of ovens, microwave ovens, air fryers, and other products currently on the market are generally shaded-pole motors. The working efficiency of these motors is less than 30%. In order to achieve the same speed and air volume, a larger motor body is required to meet the application requirements. Their low working efficiency leads to high winding temperature, causing safety issues and high energy consumption. They are also inconvenient for speed adjustment and control, cannot be compatible with wide voltage input, are inconvenient for production, and are prone to burning out the windings due to incorrect input voltage. Utility Model Content

[0003] This invention provides a non-isolated low-power EC three-phase motor control system, which can effectively solve the problems existing in the application of shaded-pole motors.

[0004] This utility model is achieved through the following technical solution:

[0005] A non-isolated low-power EC three-phase motor control system, the control system including an AC-DC BUCK control circuit, a motor speed signal module, a motor drive control module, a motor speed regulation signal module, a motor phase line output port, a motor, and a programming port;

[0006] The AC-DC BUCK control circuit is connected to the motor drive control module. The motor drive control module is connected to the motor speed signal module, the motor speed control signal module, the motor phase line output port, and the programming port. The motor speed signal module, the motor phase line output port, and the motor speed control signal module are all connected to the motor.

[0007] Furthermore, the AC-DC BUCK control circuit supplies power to the motor drive control module, which outputs control signals to the motor speed control signal module and the motor phase line output port. The motor speed control signal module controls the motor speed, and the motor drive control module receives the motor speed signal fed back from the motor speed signal module.

[0008] Furthermore, the AC-DC BUCK control circuit includes a rectifier chip BD1. Terminal 1 of rectifier chip BD1 is connected to the live wire via a fuse. Terminal 3 of rectifier chip BD1 is connected to the positive terminal of capacitor EC1, one end of capacitor C11, one end of resistor R1, and terminals 5 and 6 of chip U1. The other end of resistor R1 is connected to one end of resistor R2. The other end of resistor R2 is connected to one end of resistor R3, one end of capacitor C2, and terminal 1 of chip U1. Terminal 3 of chip U1 is connected to resistor R... One end of chip U1, one end of capacitor C3, and one end of resistor R6 are connected. Terminal 3 of chip U1 is connected to one end of resistor RS1 and one end of resistor RS2. The other end of resistor RS2 is connected to the other end of resistor RS1, the other end of resistor R6, the other end of capacitor C3, the other end of capacitor C2, terminal 8 of chip U1, terminal 1 of inductor L1 with magnetic core, the negative terminal of diode D1, and one end of capacitor C1. The other end of capacitor C1 is connected to the other end of resistor R3 and the negative terminal of diode D1.

[0009] The other end of resistor R5 is connected to one end of resistor R4. The other end of resistor R4 is connected to the positive terminal of capacitor EC2, the positive terminal of diode D2, one end of resistor R7, and terminal 2 of inductor L1 with magnetic core, and then connected to the 12V output terminal. The other end of resistor R7 is connected to the negative terminal of capacitor EC2, the positive terminal of diode D1, the negative terminal of capacitor EC1, the other end of capacitor C11, and terminal 4 of rectifier chip BD1. Terminal 2 of rectifier chip BD1 is connected to the neutral wire.

[0010] Furthermore, the motor drive control module includes chip U2. Terminal 1 of chip U2 is connected to a 5V terminal and one end of capacitor C7. Terminal 3 of chip U2 is connected to one end of capacitor C8. Terminal 4 of chip U2 is connected to one end of capacitor C8. The other end of capacitor C7 is connected to the other ends of capacitors C8 and C9, and then grounded. Terminal 2 of chip U2 is grounded. Terminal 6 of chip U2 is connected to the motor speed control signal module. Terminal 8 of chip U2 is connected to the SCL terminal of the programming port. Terminal 9 of chip U2 is connected to the motor speed signal module. Terminal 10 of chip U2 is connected to ground after being connected in series with resistor R9. Terminal 12 of chip U2 is connected to terminal 13 of chip U2 and the W terminal of the motor phase line output port. Terminal 14 of chip U2 is connected to terminal 15 of chip U2 and one end of resistor R12. Terminal 6 is connected to terminal 17 of chip U2 and one end of resistor R13. Terminal 18 of chip U2 is connected to terminal 18 of chip U2 and the V terminal of the motor phase output port. Terminal 20 of chip U2 is connected to terminal 21 of chip U2 and one end of resistor R11. The other end of resistor R12 is connected to the other ends of resistor R13 and resistor R11 and then grounded. Terminal 22 of chip U2 is connected to the core... Terminal 23 of chip U2 is connected to terminal U of the motor phase output port. Terminal 24 of chip U2 is connected to terminal 25 of chip U2, one end of capacitor C5, one end of capacitor C6, the negative terminal of diode ZD, and the 12V input terminal. The positive terminal of diode ZD is connected to the other end of capacitor C6 and then grounded. The other end of capacitor C5 is connected to terminal 26 of chip U2. Capacitor C4 is connected between terminal 27 and terminal 28 of chip U2.

[0011] Furthermore, the motor speed signal module includes a transistor Q1. The base of the transistor Q1 is connected to terminal 9 of the chip U2 and one end of resistor R15, respectively. The other end of resistor R15 is connected to a 5V terminal. The collector of the transistor Q1 is connected to the output terminal of the motor speed signal and one end of resistor R14, respectively. The other end of resistor R14 is connected to a 5V terminal. The emitter of the transistor Q1 is grounded.

[0012] Furthermore, the motor speed control signal module includes a diode D3. The positive terminal of the diode D3 is connected to terminal 6 of the chip U2 and one end of the capacitor C10, respectively. The other end of the capacitor C10 is grounded. The negative terminal of the diode D3 is connected to the input terminal of the motor speed control signal.

[0013] Furthermore, the chip U2 of the motor drive control module is either FT8213Q or FT8215Q.

[0014] The beneficial effects of this utility model are:

[0015] This invention is applied to the drive circuit of the fan motor in kitchen appliances such as ovens, microwave ovens, and air fryers.

[0016] This utility model integrates an AC voltage rectifier circuit, which is compatible with a wide range of AC voltage inputs and can meet the voltage input requirements of AC: 90-240V 50 / 60HZ. The circuit integrates a voltage conversion module, which outputs a stable low voltage (generally 5-24V) through the chopper of the power supply IC for use by the downstream circuit.

[0017] The motor corresponding to this utility model is a three-phase brushless DC inverter motor. The motor has high power density, large starting torque, and a sensorless FOC control method. The motor has low operating noise, closed-loop control, stable operation, convenient speed adjustment and control, and high conversion efficiency.

[0018] The driver chip of this invention has protection functions such as undervoltage, overheating, hardware overcurrent, software overcurrent, stall, and soft start. At the same time, the driver system can support speed regulation functions such as pulse width modulation (PWM), frequency modulation (CLOCK), and analog voltage output from the host computer. The driver system can also output FG / RD feedback signals to facilitate real-time monitoring and closed-loop control of the fan motor by the host computer system. Attached Figure Description

[0019] Figure 1 This is a structural block diagram of the present invention.

[0020] Figure 2 This is the AC-DC BUCK control circuit diagram of this utility model.

[0021] Figure 3 This is the circuit diagram of the motor drive control module of this utility model.

[0022] Figure 4 This is the circuit diagram of the motor speed signal module of this utility model.

[0023] Figure 5 This is the circuit diagram of the motor speed control signal module of this utility model.

[0024] Figure 6 This is the circuit diagram of the programming port of this utility model.

[0025] Figure 7 This is a circuit diagram of the motor phase line output port of this utility model. Detailed Implementation

[0026] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of this application with unnecessary detail.

[0027] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0028] It should also be understood that the terminology used in this application specification is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0029] The following is in conjunction with the appendix to this application specification. Figure 1-7 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] like Figure 1 As shown, a non-isolated low-power EC three-phase motor control system includes an AC-DCBUCK control circuit, a motor speed signal module, a motor drive control module, a motor speed regulation signal module, a motor phase line output port, a motor, and a programming port.

[0032] The AC-DC BUCK control circuit is connected to the motor drive control module. The motor drive control module is connected to the motor speed signal module, the motor speed control signal module, the motor phase line output port, and the programming port. The motor speed signal module, the motor phase line output port, and the motor speed control signal module are all connected to the motor.

[0033] like Figure 1 As shown, the AC-DC BUCK control circuit further supplies power to the motor drive control module. The motor drive control module outputs control signals to the motor speed control signal module and the motor phase line output port. The motor speed control signal module controls the motor speed. The motor drive control module receives the motor speed signal fed back by the motor speed signal module.

[0034] like Figure 2 As shown, the AC-DC BUCK control circuit further includes a rectifier chip BD1. Terminal 1 of rectifier chip BD1 is connected to the live wire via a fuse. Terminal 3 of rectifier chip BD1 is connected to the positive terminal of capacitor EC1, one end of capacitor C11, one end of resistor R1, and terminals 5 and 6 of chip U1. The other end of resistor R1 is connected to one end of resistor R2. The other end of resistor R2 is connected to one end of resistor R3, one end of capacitor C2, and terminal 1 of chip U1. Terminal 3 of chip U1 is connected to resistor R... One end of chip U1, one end of capacitor C3, and one end of resistor R6 are connected. Terminal 3 of chip U1 is connected to one end of resistor RS1 and one end of resistor RS2. The other end of resistor RS2 is connected to the other end of resistor RS1, the other end of resistor R6, the other end of capacitor C3, the other end of capacitor C2, terminal 8 of chip U1, terminal 1 of inductor L1 with magnetic core, the negative terminal of diode D1, and one end of capacitor C1. The other end of capacitor C1 is connected to the other end of resistor R3 and the negative terminal of diode D1.

[0035] The other end of resistor R5 is connected to one end of resistor R4. The other end of resistor R4 is connected to the positive terminal of capacitor EC2, the positive terminal of diode D2, one end of resistor R7, and terminal 2 of inductor L1 with magnetic core, and then connected to the 12V output terminal. The other end of resistor R7 is connected to the negative terminal of capacitor EC2, the positive terminal of diode D1, the negative terminal of capacitor EC1, the other end of capacitor C11, and terminal 4 of rectifier chip BD1. Terminal 2 of rectifier chip BD1 is connected to the neutral wire.

[0036] like Figure 3As shown, further, the motor drive control module includes chip U2. Terminal 1 of chip U2 is connected to the 5V terminal and one end of capacitor C7. Terminal 3 of chip U2 is connected to one end of capacitor C8. Terminal 4 of chip U2 is connected to one end of capacitor C8. The other end of capacitor C7 is connected to the other ends of capacitors C8 and C9, and then grounded. Terminal 2 of chip U2 is grounded. Terminal 6 of chip U2 is connected to the motor speed control signal module. Terminal 8 of chip U2 is connected to the SCL terminal of the programming port. Terminal 9 of chip U2 is connected to the motor speed signal module. Terminal 10 of chip U2 is connected to ground after being connected in series with resistor R9. Terminal 12 of chip U2 is connected to terminal 13 of chip U2 and the W terminal of the motor phase line output port. Terminal 14 of chip U2 is connected to terminal 15 of chip U2 and one end of resistor R12. Terminal 16 of chip U2 is connected to terminal 17 of chip U2 and one end of resistor R13. Terminal 18 of chip U2 is connected to terminal 18 of chip U2 and the V terminal of the motor phase output port. Terminal 20 of chip U2 is connected to terminal 21 of chip U2 and one end of resistor R11. The other end of resistor R12 is connected to the other ends of resistor R13 and resistor R11 and then grounded. Terminal 22 of chip U2 is connected to... Terminal 23 of chip U2 is connected to terminal U of the motor phase line output port. Terminal 24 of chip U2 is connected to terminal 25 of chip U2, one end of capacitor C5, one end of capacitor C6, the negative terminal of diode ZD, and the 12V input terminal. The positive terminal of diode ZD is connected to the other end of capacitor C6 and then grounded. The other end of capacitor C5 is connected to terminal 26 of chip U2. Capacitor C4 is connected between terminal 27 and terminal 28 of chip U2.

[0037] like Figure 4 As shown, the motor speed signal module further includes a transistor Q1. The base of the transistor Q1 is connected to terminal 9 of the chip U2 and one end of the resistor R15. The other end of the resistor R15 is connected to the 5V terminal. The collector of the transistor Q1 is connected to the output terminal of the motor speed signal and one end of the resistor R14. The other end of the resistor R14 is connected to the 5V terminal. The emitter of the transistor Q1 is grounded.

[0038] like Figure 5 As shown, the motor speed control signal module further includes a diode D3. The positive terminal of the diode D3 is connected to terminal 6 of the chip U2 and one end of the capacitor C10, respectively. The other end of the capacitor C10 is grounded. The negative terminal of the diode D3 is connected to the input terminal of the motor speed control signal.

[0039] Furthermore, the chip U2 of the motor drive control module is either FT8213Q or FT8215Q.

[0040] The working principle is as follows: AC power enters the AC-DC BUCK control circuit through the neutral and live wires. After rectification by the AC-DC BUCK control circuit, the rectified DC high voltage is converted into DC low voltage 12V by the power chip U1. The DC low voltage 12V is used to power the motor drive control module, which in turn drives the motor speed control signal module, the motor speed signal module, and the motor phase line output port.

[0041] The motor chip of this invention is specifically designed for BLDC (brushless DC) motor applications. It features PWM speed regulation, can provide FG signal feedback, and operates in a three-phase sensorless FOC control mode.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A non-isolated low-power EC three-phase motor control system, characterized in that, The control system includes an AC-DCBUCK control circuit, a motor speed signal module, a motor drive control module, a motor speed regulation signal module, a motor phase line output port, a motor, and a programming port; The AC-DC BUCK control circuit is connected to the motor drive control module. The motor drive control module is connected to the motor speed signal module, the motor speed control signal module, the motor phase line output port, and the programming port. The motor speed signal module, the motor phase line output port, and the motor speed control signal module are all connected to the motor.

2. The non-isolated low-power EC three-phase motor control system according to claim 1, characterized in that, The AC-DC BUCK control circuit supplies power to the motor drive control module. The motor drive control module outputs control signals to the motor speed control signal module and the motor phase line output port. The motor speed control signal module controls the motor speed. The motor drive control module receives the motor speed signal fed back by the motor speed signal module.

3. The non-isolated low-power EC three-phase motor control system according to claim 1, characterized in that, The AC-DC BUCK control circuit includes a rectifier chip BD1. Terminal 1 of rectifier chip BD1 is connected to the live wire via a fuse. Terminal 3 of rectifier chip BD1 is connected to the positive terminal of capacitor EC1, one end of capacitor C11, one end of resistor R1, and terminals 5 and 6 of chip U1. The other end of resistor R1 is connected to one end of resistor R2. The other end of resistor R2 is connected to one end of resistor R3, one end of capacitor C2, and terminal 1 of chip U1. Terminal 3 of chip U1 is connected to resistor R... One end of chip U1, one end of capacitor C3, and one end of resistor R6 are connected. Terminal 3 of chip U1 is connected to one end of resistor RS1 and one end of resistor RS2. The other end of resistor RS2 is connected to the other end of resistor RS1, the other end of resistor R6, the other end of capacitor C3, the other end of capacitor C2, terminal 8 of chip U1, terminal 1 of inductor L1 with magnetic core, the negative terminal of diode D1, and one end of capacitor C1. The other end of capacitor C1 is connected to the other end of resistor R3 and the negative terminal of diode D1. The other end of resistor R5 is connected to one end of resistor R4. The other end of resistor R4 is connected to the positive terminal of capacitor EC2, the positive terminal of diode D2, one end of resistor R7, and terminal 2 of inductor L1 with magnetic core, and then connected to the 12V output terminal. The other end of resistor R7 is connected to the negative terminal of capacitor EC2, the positive terminal of diode D1, the negative terminal of capacitor EC1, the other end of capacitor C11, and terminal 4 of rectifier chip BD1. Terminal 2 of rectifier chip BD1 is connected to the neutral wire.

4. The non-isolated low-power EC three-phase motor control system according to claim 1, characterized in that, The motor drive control module includes chip U2. Terminal 1 of chip U2 is connected to a 5V terminal and one end of capacitor C7. Terminal 3 of chip U2 is connected to one end of capacitor C8. Terminal 4 of chip U2 is connected to one end of capacitor C8. The other end of capacitor C7 is connected to the other ends of capacitors C8 and C9, and then grounded. Terminal 2 of chip U2 is grounded. Terminal 6 of chip U2 is connected to the motor speed control signal module. Terminal 8 of chip U2 is connected to the SCL terminal of the programming port. Terminal 9 of chip U2 is connected to the motor speed signal module. Terminal 10 of chip U2 is connected to ground after being connected in series with resistor R9. Terminal 12 of chip U2 is connected to terminal 13 of chip U2 and the W terminal of the motor phase line output port. Terminal 14 of chip U2 is connected to terminal 15 of chip U2 and one end of resistor R12. Terminal 16 of chip U2... The terminals are connected to terminal 17 of chip U2 and one end of resistor R13, respectively. Terminal 18 of chip U2 is connected to terminal 18 of chip U2 and the V terminal of the motor phase line output port, respectively. Terminal 20 of chip U2 is connected to terminal 21 of chip U2 and one end of resistor R11, respectively. The other end of resistor R12 is connected to the other ends of resistor R13 and resistor R11 and then grounded. Terminal 22 of chip U2 is connected to terminal 23 of chip U2 and the U terminal of the motor phase line output port, respectively. Terminal 24 of chip U2 is connected to terminal 25 of chip U2, one end of capacitor C5, one end of capacitor C6, the negative terminal of diode ZD and the 12V input terminal, respectively. The positive terminal of diode ZD is connected to the other end of capacitor C6 and then grounded. The other end of capacitor C5 is connected to terminal 26 of chip U2. Capacitor C4 is connected between terminals 27 and 28 of chip U2.

5. The non-isolated low-power EC three-phase motor control system according to claim 4, characterized in that, The motor speed signal module includes a transistor Q1. The base of transistor Q1 is connected to terminal 9 of chip U2 and one end of resistor R15. The other end of resistor R15 is connected to a 5V terminal. The collector of transistor Q1 is connected to the output terminal of the motor speed signal and one end of resistor R14. The other end of resistor R14 is connected to a 5V terminal. The emitter of transistor Q1 is grounded.

6. The non-isolated low-power EC three-phase motor control system according to claim 4, characterized in that, The motor speed control signal module includes a diode D3. The positive terminal of the diode D3 is connected to terminal 6 of the chip U2 and one end of the capacitor C10, respectively. The other end of the capacitor C10 is grounded. The negative terminal of the diode D3 is connected to the input terminal of the motor speed control signal.

7. The non-isolated low-power EC three-phase motor control system according to claim 4, characterized in that, The chip U2 of the motor drive control module is either FT8213Q or FT8215Q.

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