Swimming pool water pump control circuit

Abstract

The utility model relates to the technical field of swimming pool water pumps, and discloses a swimming pool water pump control circuit which comprises a motor driving circuit. A switching voltage stabilizing circuit; the three-phase half-bridge circuit is used for converting the direct current into three-phase alternating current; the current sampling circuit is used for monitoring the current condition of the swimming pool water pump in real time; a wire holder; through the design of the motor driving circuit, the rotating speed and the rotating direction of the motor can be accurately controlled, the working state of the water pump can be adjusted according to actual requirements, unnecessary energy consumption is reduced, and more efficient water circulation and filtering can be achieved. Through the design of the switching voltage stabilizing circuit, adjustment and optimization can be carried out according to the fluctuation range of power supply voltage, stable voltage and current are provided for the whole water pump control circuit, then the stability and reliability of output voltage are guaranteed, the risk that a motor and electronic elements in the water pump are damaged is reduced, and the running reliability of the water pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pool pumps, in particular to the control of pool pumps, and specifically to a control circuit for a pool pump. Background Technique

[0002] The pool pump is an important part of the pool maintenance system. It is mainly used to circulate, filter and clean the pool water to ensure that the water quality meets the health standards and extend the service life of the pool.

[0003] After retrieval, the patent with the application number CN201921311054.4 discloses a control circuit for a pool filtration pump. In order to overcome the problems of the original technology such as single function of the pump control circuit, poor human-computer interaction performance, and low working efficiency; the utility model adopts a power board and a display board connected by communication. The power board is provided with a safety detection circuit, a motor detection circuit and a motor drive circuit connected to the main control circuit; the display board is provided with a key circuit, a water flow detection circuit, a PH detection circuit, a wireless communication circuit and a display circuit connected to the display control circuit. This circuit adds a PH detection circuit, a water flow detection circuit, etc. on the basis of the original technology, enriching the functionality of the circuit; controlling the motor according to the high and low levels of the Hall sensor to form feedback and improve the working efficiency of the motor; adding a key circuit, a display circuit and a wireless communication circuit, etc., improving the human-computer interaction performance between the user and the device, facilitating the user and enhancing the user experience.

[0004] The current control of the pool pump is not convenient for accurately controlling the rotation speed and direction of the motor, and thus it is not convenient to adjust the working state of the pump, resulting in increased energy consumption and inability to efficiently perform water circulation and filtration; moreover, the output voltage when controlling the pump is not stable enough, increasing the risk of damage to the motor and electronic components in the pump, and thus reducing the reliability of the pump operation. Therefore, we need to propose a control circuit for a pool pump. Content of the Utility Model

[0005] The purpose of the utility model is to provide a control circuit for a pool pump. Through the design of the motor drive circuit, the rotation speed and direction of the motor can be accurately controlled, and the working state of the pump can be adjusted according to actual needs, reducing unnecessary energy consumption and contributing to more efficient water circulation and filtration; through the design of the switching regulator circuit, it can be adjusted and optimized according to the fluctuation range of the power supply voltage, and provide stable voltage and current for the entire pump control circuit, thereby ensuring the stability and reliability of the output voltage, further reducing the risk of damage to the motor and electronic components in the pump, and improving the reliability of the pump operation, so as to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A control circuit for a pool pump, comprising:

[0007] A motor drive circuit for converting electrical energy into mechanical energy and controlling the rotation speed and direction of a motor to achieve water circulation and filtration;

[0008] A switching voltage regulator circuit for providing stable voltage and current to the control circuit and reducing the impact of voltage fluctuations on the motor;

[0009] A three-phase half-bridge circuit for converting direct current into three-phase alternating current;

[0010] A current sampling circuit for real-time monitoring of the current situation of the pool pump;

[0011] Terminal block;

[0012] The three-phase half-bridge circuit is electrically connected to the motor drive circuit, the terminal block, and the current sampling circuit respectively, and the terminal block, the current sampling circuit, and the switching voltage regulator circuit are all electrically connected to the motor drive circuit;

[0013] The motor drive circuit includes a motor drive chip U1 and a half-bridge gate drive circuit electrically connected to the drive chip U1 and the terminal block.

[0014] Preferably, the half-bridge gate drive circuit includes a half-bridge gate drive chip U16, a half-bridge gate drive chip U18, and a half-bridge gate drive chip U17. The pin 1 of the half-bridge gate drive chip U16, the pin 1 of the half-bridge gate drive chip U18, and the pin 1 of the half-bridge gate drive chip U17 are all connected to the pin 35 of the motor drive chip U1. A diode D15 and a diode D16 are connected between the pin 8 of the half-bridge gate drive chip U16 and the pin 8 of the half-bridge gate drive chip U18. A diode D17 is connected between one end of the diode D15 and the pin 8 of the half-bridge gate drive chip U17.

[0015] Preferably, a resistor R55 is connected to the pin 2 of the half-bridge gate drive chip U16, and a resistor R56 is connected to the pin 3 of the half-bridge gate drive chip U16. One end of the resistor R55 is connected to the pin 34 of the motor drive chip U1, and one end of the resistor R56 is connected to the pin 31 of the motor drive chip U1;

[0016] A resistor R57 is connected to the pin 2 of the half-bridge gate drive chip U18, and a resistor R58 is connected to the pin 3 of the half-bridge gate drive chip U18. One end of the resistor R57 is connected to the pin 32 of the motor drive chip U1, and one end of the resistor R58 is connected to the pin 29 of the motor drive chip U1;

[0017] A resistor R59 is connected to pin 2 of the half-bridge gate driver chip U17, and a resistor R60 is connected to pin 3 of the half-bridge gate driver chip U17. One end of the resistor R59 is connected to pin 33 of the motor driver chip U1, and one end of the resistor R60 is connected to pin 30 of the motor driver chip U1.

[0018] Preferably, the switching voltage regulator circuit includes a switching voltage regulator chip U6. A resistor R34 is connected to pin 2 of the switching voltage regulator chip U6, and an inductor L1 is connected to pin 8 of the voltage regulator chip U6. The connection terminal of the resistor R34 and the inductor L1 is connected to pin 35 of the motor driver chip U1;

[0019] A capacitor C30, a capacitor C31, and a capacitor C70 connected in parallel are connected between pin 6 and pin 7 of the switching voltage regulator chip U6, and pin 7 of the switching voltage regulator chip U6 is connected to the power supply. A diode D8 grounded is also connected to pin 8 of the switching voltage regulator chip U6.

[0020] Preferably, the current sampling circuit includes an amplifier U1A. A resistor R105, a capacitor C67, and a resistor R106 are connected between the positive input terminal and the negative input terminal of the amplifier U1A. A resistor R108 connected to pin 9 of the motor driver chip U1 is connected to the positive input terminal of the amplifier U1A. A resistor R107 is connected between the negative input terminal and the output terminal of the amplifier U1A. A resistor R88 grounded and a capacitor C68 are also connected to the output terminal of the amplifier U1A. The connection terminal of the resistor R88 and the capacitor C68 is connected to pin 4 of the motor driver chip U1.

[0021] Preferably, the wiring base includes a chip U10. The three-phase half-bridge circuit includes MOS transistors Q1, Q2, Q3, and Q4. The D poles of the MOS transistor Q1 and the MOS transistor Q2 are connected and connected to the power supply. The S poles of the MOS transistor Q1 and the MOS transistor Q2 are connected and connected to the chip U10. A resistor R10 is connected between the G pole and the S pole of the MOS transistor Q2. A resistor R3 is connected between the G pole and the S pole of the MOS transistor Q1. A resistor R93 is connected to the G pole of the G pole of the MOS transistor Q1. A resistor R13 is connected to the G pole of the MOS transistor Q2. The connection terminal of the resistor R93 and the resistor R13 is connected to pin 7 of the half-bridge gate driver chip U18.

[0022] Preferably, the connection terminals of the D poles of the MOS transistors Q3 and Q4 are connected to the connection terminals of the S poles of the MOS transistors Q1 and Q2. The S pole of the MOS transistor Q3 is connected to the S pole of the MOS transistor Q4. A resistor R20 is connected between the G pole and the S pole of the MOS transistor Q3. A resistor R8 is connected between the G pole and the S pole of the MOS transistor Q4. A resistor R19 is connected to the G pole of the MOS transistor Q3. A resistor R18 is connected to the G pole of the MOS transistor Q4. The connection terminals of the resistor R19 and the resistor R18 are connected to the 5th pin of the half-bridge gate drive chip U18.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0024] 1. Through the design of the motor drive circuit, the present utility model can accurately control the rotation speed and direction of the motor, adjust the working state of the water pump according to actual needs, reduce unnecessary energy consumption, and contribute to achieving a more efficient water cycle and filtration;

[0025] 2. Through the design of the switching voltage regulator circuit, the present utility model can be adjusted and optimized according to the fluctuation range of the power supply voltage, provide stable voltage and current for the entire water pump control circuit, thereby ensuring the stability and reliability of the output voltage, reducing the risk of damage to the motor and electronic components in the water pump, and improving the reliability of the water pump operation. Description of the Drawings

[0026] Figure 1 is the circuit diagram of the motor drive chip of the present utility model;

[0027] Figure 2 is the circuit diagram of the half-bridge gate drive circuit of the present utility model;

[0028] Figure 3 is the circuit diagram of the switching voltage regulator circuit of the present utility model;

[0029] Figure 4 is the circuit diagram of the current sampling circuit of the present utility model;

[0030] Figure 5 is the circuit diagram of the three-phase half-bridge circuit of the present utility model;

[0031] Figure 6 is the circuit diagram of the terminal block of the present utility model;

[0032] Figure 7 is the partial circuit schematic diagram of the three-phase half-bridge circuit of the present utility model. Detailed Embodiments

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figure 1-7 , the present invention provides a technical solution: a pool pump control circuit, including:

[0035] A motor drive circuit for converting electrical energy into mechanical energy and controlling the motor speed and rotation direction to achieve water circulation and filtration;

[0036] A switching voltage regulator circuit for providing stable voltage and current to the control circuit and reducing the impact of voltage fluctuations on the motor;

[0037] A three-phase half-bridge circuit for converting direct current into three-phase alternating current;

[0038] A current sampling circuit for real-time monitoring of the current situation of the pool pump;

[0039] A terminal block for providing connections for the above circuits;

[0040] The three-phase half-bridge circuit is electrically connected to the motor drive circuit, the terminal block, and the current sampling circuit respectively, and the terminal block, the current sampling circuit, and the switching voltage regulator circuit are all electrically connected to the motor drive circuit;

[0041] The motor drive circuit includes a motor drive chip U1 and a half-bridge gate drive circuit electrically connected to the drive chip U1 and the terminal block.

[0042] The motor drive chip U1 uses the FU6812L2 chip, and the half-bridge gate drive circuit uses the FD2203S chip. The FU6812L2 is mainly responsible for the motor control algorithm and logic processing, while the FD2203S is responsible for converting the control signal generated by the FU6812L2 into a signal capable of driving the power MOSFET, thereby realizing the drive of the motor.

[0043] The FU6812L2 chip receives instructions from the controller or signals fed back by sensors, performs operations on the motor control algorithm through the internal motor control engine (ME), and outputs a control signal (such as a PWM signal) to the FD2203S;

[0044] The FD2203S chip receives the control signal from the FU6812L2, converts the control signal into a gate drive signal capable of driving the N-type power MOSFET, drives the power MOSFET, and thus controls the operation of the motor.

[0045] The half-bridge gate drive circuit includes a half-bridge gate drive chip U16, a half-bridge gate drive chip U18, and a half-bridge gate drive chip U17. The pin 1 of the half-bridge gate drive chip U16, the pin 1 of the half-bridge gate drive chip U18, and the pin 1 of the half-bridge gate drive chip U17 are all connected to the pin 35 of the motor drive chip U1. A diode D15 and a diode D16 are connected between the pin 8 of the half-bridge gate drive chip U16 and the pin 8 of the half-bridge gate drive chip U18. A diode D17 is connected between one end of the diode D15 and the pin 8 of the half-bridge gate drive chip U17.

[0046] A resistor R55 is connected to the pin 2 of the half-bridge gate drive chip U16, and a resistor R56 is connected to the pin 3 of the half-bridge gate drive chip U16. One end of the resistor R55 is connected to the pin 34 of the motor drive chip U1, and one end of the resistor R56 is connected to the pin 31 of the motor drive chip U1;

[0047] A capacitor C57 is connected between the pin 1 and the pin 4 of the half-bridge gate drive chip U16. A resistor R61 connected to the input end of the diode D15 is connected to the pin 1 of the half-bridge gate drive chip U16. A capacitor C48 is connected between the pin 6 and the pin 8 of the half-bridge gate drive chip U16.

[0048] A resistor R57 is connected to the pin 2 of the half-bridge gate drive chip U18, and a resistor R58 is connected to the pin 3 of the half-bridge gate drive chip U18. One end of the resistor R57 is connected to the pin 32 of the motor drive chip U1, and one end of the resistor R58 is connected to the pin 29 of the motor drive chip U1;

[0049] A capacitor C55 is connected between the pin 1 and the pin 4 of the half-bridge gate drive chip U18. A capacitor C46 is connected between the pin 6 and the pin 8 of the half-bridge gate drive chip U18.

[0050] A resistor R59 is connected to the pin 2 of the half-bridge gate drive chip U17, and a resistor R60 is connected to the pin 3 of the half-bridge gate drive chip U17. One end of the resistor R59 is connected to the pin 33 of the motor drive chip U1, and one end of the resistor R60 is connected to the pin 30 of the motor drive chip U1.

[0051] A capacitor C43 is connected between the pin 1 and the pin 4 of the half-bridge gate drive chip U17. A capacitor C44 is connected between the pin 6 and the pin 8 of the half-bridge gate drive chip U17.

[0052] The switching voltage regulator circuit includes a switching voltage regulator chip U6. A resistor R34 is connected to the 2nd pin of the switching voltage regulator chip U6. An inductor L1 is connected to the 8th pin of the voltage regulator chip U6. The connection terminals of the resistor R34 and the inductor L1 are connected to the 35th pin of the motor drive chip U1;

[0053] A capacitor C30, a capacitor C31 and a capacitor C70 which are connected in parallel are connected between the 6th pin and the 7th pin of the switching voltage regulator chip U6. And the 7th pin of the switching voltage regulator chip U6 is connected to the power supply. A diode D8 grounded is also connected to the 8th pin of the switching voltage regulator chip U6.

[0054] A capacitor C3 is connected between the 1st pin and the 8th pin of the switching voltage regulator chip U6. A capacitor C69 and a resistor R102 which are connected in parallel are connected to the 4th pin of the switching voltage regulator chip U6. One connection terminal of the capacitor C69 and the resistor R102 is connected to the 35th pin of the motor drive chip U1 and is connected to a capacitor C35 and a capacitor C34 which are connected in parallel. The other connection terminal of the capacitor C69 and the resistor R102 is connected to a resistor R101 grounded.

[0055] The current sampling circuit includes an amplifier U1A. A resistor R105, a capacitor C67 and a resistor R106 are connected between the positive input terminal and the negative input terminal of the amplifier U1A. And a resistor R108 connected to the 9th pin of the motor drive chip U1 is connected to the positive input terminal of the amplifier U1A. A resistor R107 is connected between the negative input terminal and the output terminal of the amplifier U1A. A resistor R88 grounded and a capacitor C68 are also connected to the output terminal of the amplifier U1A. And the connection terminals of the resistor R88 and the capacitor C68 are connected to the 4th pin of the motor drive chip U1.

[0056] The wiring base includes a chip U10. The three-phase half-bridge circuit includes MOS transistors Q1, Q2, Q3 and Q4. The D poles of the MOS transistors Q1 and Q2 are connected and connected to the power supply. The S poles of the MOS transistors Q1 and Q2 are connected and connected to the chip U10. A resistor R10 is connected between the G pole and the S pole of the MOS transistor Q2. A resistor R3 is connected between the G pole and the S pole of the MOS transistor Q1. A resistor R93 is connected to the G pole of the MOS transistor Q1. A resistor R13 is connected to the G pole of the MOS transistor Q2. The connection terminals of the resistor R93 and the resistor R13 are connected to the 7th pin of the half-bridge gate driver chip U18.

[0057] The connection terminals of the D poles of MOS transistor Q3 and MOS transistor Q4 are connected to the connection terminals of the S poles of MOS transistor Q1 and MOS transistor Q2 (i.e., the D poles of MOS transistor Q3 and MOS transistor Q4 are also connected and connected to chip U10). The S pole of MOS transistor Q3 is connected to the S pole of MOS transistor Q4. A resistor R20 is connected between the G pole and the S pole of MOS transistor Q3. A resistor R8 is connected between the G pole and the S pole of MOS transistor Q4. A resistor R19 is connected to the G pole of MOS transistor Q3. A resistor R18 is connected to the G pole of MOS transistor Q4. The connection terminals of resistor R19 and resistor R18 are connected to pin 5 of half-bridge gate driver chip U18.

[0058] The connection terminals of the D pole of MOS transistor Q3, the D pole of MOS transistor Q4, the S pole of MOS transistor Q1, and the S pole of MOS transistor Q2 are connected to a resistor R81. One end of resistor R81 is connected to a capacitor C66 and a resistor R82 that are connected in parallel and connected to pin 43 of motor drive chip U1.

[0059] The wiring base also includes chip U11 and chip U12. Pin 6 of half-bridge gate driver chip U18 is connected to chip U10. Pin 6 of half-bridge gate driver chip U17 is connected to chip U11. Pin 6 of half-bridge gate driver chip U16 is connected to chip U12.

[0060] The three-phase half-bridge circuit further includes MOS transistors Q5, Q6, Q7, and Q8. The connection terminals of the D poles of MOS transistor Q7, the D pole of MOS transistor Q8, the S pole of MOS transistor Q5, and the S pole of MOS transistor Q6 are connected to chip U11.

[0061] The three-phase half-bridge circuit further includes MOS transistors Q9, Q10, Q11, and Q12. The connection terminals of the D poles of MOS transistor Q11, the D pole of MOS transistor Q12, the S pole of MOS transistor Q9, and the S pole of MOS transistor Q10 are connected to chip U12.

[0062] Moreover, the S poles of MOS transistor Q1, MOS transistor Q2, MOS transistor Q3, MOS transistor Q4, MOS transistor Q5, MOS transistor Q6, MOS transistor Q7, MOS transistor Q8, MOS transistor Q9, MOS transistor Q10, MOS transistor Q11, and MOS transistor Q12 are all connected to the connection terminals of capacitor C67 and resistor R106.

[0063] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A swimming pool water pump control circuit, characterized in that: include: A motor drive circuit for converting electrical energy into mechanical energy and controlling the motor speed and direction to achieve water circulation and filtration; A switching voltage regulator circuit that provides stable voltage and current for the control circuit and reduces the impact of voltage fluctuations on the motor; A three-phase half-bridge circuit for converting direct current into three-phase alternating current; Current sampling circuit for real-time monitoring of the current status of the swimming pool pump; Terminal block; The three-phase half-bridge circuit is electrically connected to the motor drive circuit, the wiring base, and the current sampling circuit respectively, and the wiring base, the current sampling circuit, and the switching voltage stabilizing circuit are all electrically connected to the motor drive circuit; The motor driving circuit includes a motor driving chip U1 and a half-bridge gate driving circuit electrically connected to the driving chip U1 and a wiring base.

2. A swimming pool water pump control circuit according to claim 1, characterized in that: The half-bridge gate drive circuit includes a half-bridge gate drive chip U16, a half-bridge gate drive chip U18, and a half-bridge gate drive chip U17. Pin 1 of the half-bridge gate drive chip U16, pin 1 of the half-bridge gate drive chip U18, and pin 1 of the half-bridge gate drive chip U17 are all connected to pin 35 of the motor drive chip U1. A diode D15 and a diode D16 are connected between pin 8 of the half-bridge gate drive chip U16 and pin 8 of the half-bridge gate drive chip U18. A diode D17 is connected between one end of the diode D15 and pin 8 of the half-bridge gate drive chip U17.

3. A swimming pool water pump control circuit according to claim 2, characterized in that: A resistor R55 is connected to pin 2 of the half-bridge gate driver chip U16, a resistor R56 is connected to pin 3 of the half-bridge gate driver chip U16, one end of the resistor R55 is connected to pin 34 of the motor driver chip U1, and one end of the resistor R56 is connected to pin 31 of the motor driver chip U1; A resistor R57 is connected to pin 2 of the half-bridge gate driver chip U18, a resistor R58 is connected to pin 3 of the half-bridge gate driver chip U18, one end of the resistor R57 is connected to pin 32 of the motor driver chip U1, and one end of the resistor R58 is connected to pin 29 of the motor driver chip U1; Pin 2 of the half-bridge gate driver chip U17 is connected to a resistor R59, pin 3 of the half-bridge gate driver chip U17 is connected to a resistor R60, one end of the resistor R59 is connected to pin 33 of the motor driver chip U1, and one end of the resistor R60 is connected to pin 30 of the motor driver chip U1.

4. A swimming pool water pump control circuit according to claim 3, characterized in that: The switching voltage stabilizing circuit includes a switching voltage stabilizing chip U6, a resistor R34 is connected to pin 2 of the switching voltage stabilizing chip U6, an inductor L1 is connected to pin 8 of the voltage stabilizing chip U6, and the connection terminals of the resistor R34 and the inductor L1 are connected to pin 35 of the motor driving chip U1; Capacitors C30, C31 and C70 are connected in parallel between pins 6 and 7 of the switch voltage regulator chip U6, and pin 7 of the switch voltage regulator chip U6 is connected to a power supply. A grounded diode D8 is also connected to pin 8 of the switch voltage regulator chip U6.

5. A swimming pool water pump control circuit according to claim 4, characterized in that: The current sampling circuit includes an amplifier U1A, a resistor R105, a capacitor C67, and a resistor R106 are connected between the positive input and negative input terminals of the amplifier U1A, and a resistor R108 connected to pin 9 of the motor driver chip U1 is connected to the positive input terminal of the amplifier U1A, a resistor R107 is connected between the negative input and output terminals of the amplifier U1A, and a grounded resistor R88 and a capacitor C68 are also connected to the output terminal of the amplifier U1A, and the connection terminals of the resistor R88 and the capacitor C68 are connected to pin 4 of the motor driver chip U1.

6. A swimming pool water pump control circuit according to claim 5, characterized in that: The terminal block includes a chip U10, and the three-phase half-bridge circuit includes a MOS tube Q1, a MOS tube Q2, a MOS tube Q3, and a MOS tube Q4. The D pole of the MOS tube Q1 is connected to the D pole of the MOS tube Q2 and is connected to a power supply. The S pole of the MOS tube Q1 is connected to the S pole of the MOS tube Q2 and is connected to the chip U10. A resistor R10 is connected between the G pole and the S pole of the MOS tube Q2. A resistor R3 is connected between the G pole and the S pole of the MOS tube Q1. A resistor R93 is connected to the G pole of the G pole of the MOS tube Q1. A resistor R13 is connected to the G pole of the MOS tube Q2. The wiring terminals of the resistor R93 and the resistor R13 are connected to pin 7 of the half-bridge gate drive chip U18.

7. A swimming pool water pump control circuit according to claim 6, characterized in that: The connection terminals of the D pole of the MOS tube Q3 and the D pole of the MOS tube Q4 are connected to the connection terminals of the S pole of the MOS tube Q1 and the S pole of the MOS tube Q2, the S pole of the MOS tube Q3 is connected to the S pole of the MOS tube Q4, a resistor R20 is connected between the G pole and the S pole of the MOS tube Q3, a resistor R8 is connected between the G pole and the S pole of the MOS tube Q4, a resistor R19 is connected to the G pole of the MOS tube Q3, a resistor R18 is connected to the G pole of the MOS tube Q4, and the connection terminals of the resistor R19 and the resistor R18 are connected to pin 5 of the half-bridge gate drive chip U18.

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