High-speed air duct brushless driving module and motor
Through the integrated design of the power supply module, PWM control module, current sampling module and protection module, the problem that traditional brushless motor driving module cannot detect large current and temperature changes is solved, and the motor safety and miniaturization are achieved.
Patent Information
- Application Number
- CN202422216495.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-09-10
AI Technical Summary
The traditional high-speed air duct brushless motor drive module cannot detect large currents, which are prone to current fluctuations due to temperature changes, breakdown of the circuit, which poses safety hazards, is large in size and high in weight.
A brushless driving module including a power supply module, a PWM control module, a current sampling module, a voltage sampling module and a protection module is designed. By detecting current and temperature in real time, the control chip is used to achieve safety protection and integrated design of the motor.
It improves the safety and integration level of the motor, reduces the module volume, prevents current fluctuations caused by temperature changes and breaks down the circuit, and ensures the stable operation of the motor.
Smart Images
Figure CN223274025U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of brushless motors, in particular to a high-speed blower brushless drive module and a motor. Background Art
[0002] Brushless high-speed motor drive technology replaces traditional mechanical commutation with electronic commutation. Its core principle is to use a position sensor to monitor the rotor's position in real time. Based on this position information, the electronic commutation precisely controls the direction of the motor's current, thereby achieving continuous rotation. This technology eliminates the brushes and commutator found in traditional brushed motors, reducing mechanical wear and energy loss, and improving motor efficiency and reliability.
[0003] In the design of high-speed brushless hair dryer motors, traditional drive modules are unable to detect high currents, making it easy for current fluctuations caused by temperature fluctuations to cause circuit breakdown, resulting in short circuits or fires, making it difficult to ensure safety. Furthermore, traditional drive modules are bulky and heavy. Utility Model Content
[0004] The purpose of this utility model is to provide a high-speed hair dryer brushless drive module and motor that can achieve real-time detection of high current and temperature during motor operation, thereby ensuring motor safety during operation. At the same time, it improves the level of circuit integration, reduces circuit size, and reduces overall weight.
[0005] In order to solve the above technical problems, the present invention provides a high-speed blower brushless drive module, which is characterized by comprising:
[0006] a power supply module, wherein a first end of the power supply module is connected to a power supply voltage and is used to convert an AC voltage into a DC voltage;
[0007] A PWM control module, wherein a first end of the PWM control module is connected to a second end of the power module; a second end of the PWM control module is connected to the control chip U1;
[0008] a current sampling module, wherein a first end of the current sampling module is connected to a second end of the power module, and a second end of the current sampling module is connected to the control chip;
[0009] A voltage sampling module, wherein a first end of the voltage sampling module is connected to a power supply voltage, and a second end of the voltage sampling module is connected to the control chip U1;
[0010] A protection module, wherein a first end of the protection module is connected to the control chip U1 , and a second end of the protection module is connected to the motor.
[0011] Furthermore, the power module includes a diode D1; the diode D1 is arranged between the first end and the second end of the power module, and the input power voltage obtains direct current through the diode.
[0012] Specifically, the power module further includes decoupling capacitors C1 and C2, one end of the decoupling capacitor C1 is connected to the anode of the diode D1 and the other end is grounded, and one end of the decoupling capacitor C2 is connected to the cathode of the diode D1 and the other end is grounded.
[0013] Furthermore, the PWM control module includes: a signal generator, a resistor R1, a resistor R2 and a resistor R3;
[0014] One end of the resistor R1, the resistor R2 and the resistor R3 are connected to the signal generator; the other end of the resistor R1 is connected to the DC voltage, the other end of the resistor R2 is connected to the control chip U1 as the output end of the PWM control module, and the other end of the resistor R3 is grounded.
[0015] Furthermore, the current sampling module includes: a resistor R19, a resistor R20 and a capacitor C3;
[0016] One end of the resistor R19 is connected to one end of the resistor R20 and then to the DC voltage; the other end of the resistor R19 is connected to one end of the capacitor C3 and to the control chip U1; the other end of the capacitor C3 is grounded; and the other end of the resistor R20 is grounded.
[0017] Furthermore, the voltage sampling module includes: a resistor R21, a resistor R22, a resistor R23 and a capacitor C4;
[0018] The resistor R21 and the resistor R23 are arranged in series between the first end of the voltage sampling module and the ground;
[0019] One end of the resistor R22 is disposed between the resistor R21 and the resistor R23 , and the other end is connected to one end of the capacitor C4 and to the control chip U1 ; the other end of the capacitor C4 is grounded.
[0020] Furthermore, the protection module includes control chips U2, U3 and U4, the control chip U2 is connected to the U end of the motor; the control chip U3 is connected to the V end of the motor; and the control chip U4 is connected to the W end of the motor.
[0021] In addition, the present invention also provides a brushless motor, which is characterized by using any of the above-mentioned high-speed blower brushless drive modules.
[0022] Compared with the prior art, the present invention has at least the following beneficial effects:
[0023] The utility model improves the integration of the module and reduces the size of the module by rearranging the circuit. At the same time, it has the ability to adapt to large currents and large voltages. During operation, it can also detect the temperature of the module operating environment, thereby ensuring the overall safety of the module and the motor, and preventing short circuits or fires caused by current fluctuations caused by temperature changes that break down the circuit. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a schematic diagram of the circuit module of the brushless drive module of the high-speed hair dryer of the utility model;
[0025] Figure 2 This is a schematic diagram of the power module of the utility model;
[0026] Figure 3 This is a schematic diagram of the PWM control module of the utility model;
[0027] Figure 4 This is a schematic diagram of the current sampling module of the utility model;
[0028] Figure 5 This is a schematic diagram of the voltage sampling module of the utility model;
[0029] Figure 6 This is a schematic diagram of the temperature control insurance module of the utility model. DETAILED DESCRIPTION
[0030] The following is a more detailed description of the high-speed blower brushless drive module and motor of the present invention, with reference to schematic diagrams. These schematic diagrams illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art may modify the present invention as described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as a general guide for those skilled in the art and not as a limitation of the present invention.
[0031] The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.
[0032] like Figure 1 As shown, the embodiment of the utility model proposes to provide a high-speed blower brushless drive module, including
[0033] A power supply module, wherein a first end of the power supply module is connected to a power supply voltage and is used to convert an AC voltage into a DC voltage.
[0034] A PWM control module, wherein a first end of the PWM control module is connected to a second end of the power module; and a second end of the PWM control module is connected to the control chip U1.
[0035] A current sampling module, wherein a first end of the current sampling module is connected to a second end of the power module, and a second end of the current sampling module is connected to the control chip.
[0036] A voltage sampling module, wherein a first end of the voltage sampling module is connected to a power supply voltage, and a second end of the voltage sampling module is connected to the control chip U1.
[0037] A protection module, wherein a first end of the protection module is connected to the control chip U1 , and a second end of the protection module is connected to the motor.
[0038] Furthermore, the power module includes a diode D1; the diode D1 is arranged between the first end and the second end of the power module, is connected to an external power supply through the first end of the power module, and obtains direct current VDD through the diode and is connected from the second end of the power module.
[0039] Specifically, the power module further includes decoupling capacitors C1 and C2, one end of the decoupling capacitor C1 is connected to the anode of the diode D1 and the other end is grounded, and one end of the decoupling capacitor C2 is connected to the cathode of the diode D1 and the other end is grounded.
[0040] In a specific implementation example, Figure 2 As shown, the power module is connected to the external power supply VIN through the first end. After the power is turned on, the AC power of the external power supply input from the first end is converted into DC power VDD through the diode D1 set between the first end and the second end of the power module, and is connected through multiple decoupling capacitors (such as Figure 2 As shown in the figure, C1 and C2 are connected to the ground terminal to reduce the power noise of the input power supply and stabilize the voltage. Finally, the converted DC power is transmitted to the PWM control module through the second terminal.
[0041] Furthermore, the current passes through the PWM control module including: a signal generator, a resistor R1, a resistor R2 and a resistor R3;
[0042] One end of each of resistors R1, R2, and R3 is connected to the signal generator; the other end of resistor R1 is connected to the DC voltage, the other end of resistor R2 serves as the output of the PWM control module and is connected to the control chip U1. The other end of resistor R3 is grounded. These resistors work in conjunction with the signal generator to transmit the signal generator's control signal to the control chip U1 via the second end of the PWM control module in the form of a pulse-width modulated signal, thereby controlling the speed and direction of the motor.
[0043] In a specific embodiment, if Figure 3 As shown, the signal generator JP1 has three ports: port 3 connects to an external power source, port 2 connects to ground, and port 1 transmits a PWM control signal. This signal is then transmitted through resistors R1, R2, and R3, reducing noise and transmitting the signal to pin 15 of the control chip U1. The control chip U1 then transmits the drive signal to the three-phase motor via the U, V, and W phases, connecting them to the corresponding terminals of the motor to control its operating state.
[0044] like Figure 4 As shown, the current sampling module includes: a resistor R19, a resistor R20 and a capacitor C3; one end of the resistor R19 is connected to one end of the resistor R20 and then connected to the DC voltage; the other end of the resistor R19 is connected to one end of the capacitor C3 and connected to the control chip U1; the other end of the capacitor C3 is grounded; the other end of the resistor R20 is grounded. Figure 5 As shown, the voltage sampling module includes: a resistor R21, a resistor R22, a resistor R23 and a capacitor C4; the resistor R21 and the resistor R23 are arranged in series between the first end of the voltage sampling module and the ground; one end of the resistor R22 is arranged between the resistor R21 and the resistor R23, and the other end is connected to one end of the capacitor C4 and connected to the control chip U1; the other end of the capacitor C4 is grounded.
[0045] In a specific implementation example, after the current enters the circuit through the power input module, it will first pass through the first end of the voltage sampling module. When the voltage is too large, the voltage on the parallel sampling resistor will increase, thereby generating a voltage signal. This signal will be transmitted to pin 11 of the control chip U1 through the second end of the voltage sampling module. When the current is too large, the voltage drop across the multiple sampling resistors connected in series in the circuit will also increase, thereby generating a signal. This signal will be transmitted to pin 10 of the control chip U1 through the second end of the current sampling for processing. Finally, the control chip U1 triggers the circuit protection mechanism by responding to changes in the incoming current sampling signal and voltage sampling signal. By triggering the protection mechanism, the components in the circuit are prevented from being damaged due to overcurrent or overvoltage, thereby improving the safety of the motor during operation.
[0046] Furthermore, the protection module includes control chips U2, U3 and U4, the control chip U2 is connected to the U end of the motor; the control chip U3 is connected to the V end of the motor; and the control chip U4 is connected to the W end of the motor.
[0047] In a specific embodiment, if Figure 6As shown, the control chips U2, U3, and U4 use a control chip model PA20C180P, which includes 8 pins. Pin 1 of the three control chips is grounded, pin 3 of the three control chips is connected to an external power supply, and pins 2 and 4 of the three control chips are connected to a voltage divider protection circuit. The other four pins of the control chip U2 are connected to the U-terminal input of the motor, the other four pins of the control chip U3 are connected to the V-terminal input of the motor, and the other four pins of the control chip U4 are connected to the W-terminal input of the motor. As an example, when the ambient temperature is greater than 160°C, the control chip will divert the current through the voltage divider protection circuit, thereby reducing the damage to the circuit caused by overheating.
[0048] In another specific embodiment, a motor is driven by the high-speed blower brushless drive module, thereby supporting a wider speed regulation range during operation. The speed of the motor can be adjusted through the control module as needed to meet the needs of different usage scenarios. At the same time, thanks to the adjustment of the voltage divider circuit as shown in the figure, the motor can obtain a smoother torque output. When the operating temperature rises, the temperature control module in the drive module will detect the change in ambient temperature and automatically adjust the voltage in the circuit to prevent motor damage caused by overheating.
[0049] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
Claims
1. A high-speed blower brushless drive module, characterized in that: include: a power supply module, wherein a first end of the power supply module is connected to a power supply voltage and is used to convert an AC voltage into a DC voltage; A PWM control module, wherein a first end of the PWM control module is connected to a second end of the power module; a second end of the PWM control module is connected to the control chip U1; A current sampling module, wherein a first end of the current sampling module is connected to a second end of the power module, and a second end of the current sampling module is connected to the control chip U1; A voltage sampling module, wherein a first end of the voltage sampling module is connected to a power supply voltage, and a second end of the voltage sampling module is connected to the control chip U1; A protection module, wherein a first end of the protection module is connected to the control chip U1 , and a second end of the protection module is connected to the motor.
2. The high-speed blower brushless drive module according to claim 1, characterized in that: The power module includes a diode D1 ; the diode D1 is arranged between the first end and the second end of the power module, and the input power voltage obtains direct current through the diode.
3. The high-speed blower brushless drive module according to claim 2, characterized in that: The power module further includes decoupling capacitors C1 and C2. One end of the decoupling capacitor C1 is connected to the anode of the diode D1 and the other end is grounded. One end of the decoupling capacitor C2 is connected to the cathode of the diode D1 and the other end is grounded.
4. The high-speed blower brushless drive module according to claim 1, characterized in that: The PWM control module includes: a signal generator, a resistor R1, a resistor R2 and a resistor R3; One end of the resistor R1, the resistor R2 and the resistor R3 are connected to the signal generator; the other end of the resistor R1 is connected to the DC voltage, the other end of the resistor R2 is connected to the control chip U1 as the output end of the PWM control module, and the other end of the resistor R3 is grounded.
5. The high-speed blower brushless drive module according to claim 1, characterized in that: The current sampling module includes: a resistor R19, a resistor R20 and a capacitor C3; One end of the resistor R19 is connected to one end of the resistor R20 and then to the DC voltage; the other end of the resistor R19 is connected to one end of the capacitor C3 and to the control chip U1; the other end of the capacitor C3 is grounded; and the other end of the resistor R20 is grounded.
6. The high-speed blower brushless drive module according to claim 1, characterized in that: The voltage sampling module includes: a resistor R21, a resistor R22, a resistor R23 and a capacitor C4; The resistor R21 and the resistor R23 are arranged in series between the first end of the voltage sampling module and the ground; One end of the resistor R22 is disposed between the resistor R21 and the resistor R23 , and the other end is connected to one end of the capacitor C4 and to the control chip U1 ; the other end of the capacitor C4 is grounded.
7. The high-speed blower brushless drive module according to claim 1, characterized in that: The protection module includes control chips U2, U3 and U4. The control chip U2 is connected to the U end of the motor; the control chip U3 is connected to the V end of the motor; and the control chip U4 is connected to the W end of the motor.
8. A motor, characterized in that: The invention comprises a high-speed blower brushless drive module as described in any one of claims 1 to 7.