Power supply control and signal acquisition device

Abstract

The utility model discloses a power supply control and signal acquisition device, and relates to the technical field of power supply control, the power supply control and signal acquisition device comprises a sine wave detection module, a motor control module, a zero-cross detection module and a switching power supply module, the sine wave detection module comprises a mutual inductor and an amplifier, and the motor control module comprises a bidirectional silicon controlled rectifier and a first silicon controlled rectifier optocoupler. The zero-cross detection module comprises a second silicon controlled rectifier optocoupler, an optocoupler current limiting element and a dual-channel optocoupler; wherein the sine wave detection module converts strong current into weak current small signals through a mutual inductor, and then the weak current small signals are amplified and output through an amplifier, so that the loss is low, electrical isolation is realized, and the safety is high; the motor control module is high in response speed, small in size, long in service life and light in weight through optocoupler control, and can trigger a bidirectional silicon controlled rectifier at different moments according to needs to realize continuous adjustment of an alternating current power supply; the zero-cross detection module can work only when zero-cross detection is needed, electric energy is not consumed in other time, and loss is reduced.

Description

Technical Field

[0001] The present application relates to the field of power supply control technology, and in particular to a power supply control and signal acquisition device. Background Art

[0002] Home appliances primarily refer to various electrical and electronic devices used in the home. They liberate people from arduous, tedious, and time-consuming housework, creating a more comfortable, beautiful, and healthy living and working environment, and providing a rich variety of cultural and entertainment opportunities. They have become a necessity in modern family life.

[0003] Power control and signal acquisition in home appliances are key technologies for intelligent and efficient operation. Power control typically involves power management chips (PMICs), including AC-DC and DC-DC converters, low-dropout linear regulators (LDOs), and switching technologies. Signal acquisition involves voltage and current.

[0004] However, in the current power control and signal acquisition of home appliances, zero-crossing detection is generally performed without controlled output, resulting in certain losses; directly detecting the strong current sinusoidal wave has high losses, large size, and high cost; although weak current can control strong current, relays are usually required, which leads to problems such as large size, short switch life, and heavy weight. Utility Model Content

[0005] To this end, the present application provides a power supply control and signal acquisition device to solve the problems of high power supply control circuit loss, high cost and large size in the prior art.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A power supply control and signal acquisition device includes a sine wave detection module, a motor control module, a zero-crossing detection module, and a switching power supply module. The sine wave detection module includes a mutual inductor and an amplifier. The motor control module includes a bidirectional thyristor and a first thyristor optocoupler. The zero-crossing detection module includes a second thyristor optocoupler, an optocoupler current-limiting element, and a dual-channel optocoupler.

[0008] The primary side of the mutual inductor is electrically connected to the mains, the secondary side of the mutual inductor is electrically connected to the input end of the amplifier, and the output end of the amplifier is electrically connected to the host computer through a serial communication port; one end of the bidirectional thyristor is electrically connected to the mains, and the other end is electrically connected to one end of the first thyristor optocoupler, and the other end of the first thyristor optocoupler is electrically connected to the host computer through a serial communication port; the second thyristor optocoupler and the optocoupler current-limiting element are connected in series, and one end is electrically connected to the mains, and the other end is electrically connected to the host computer through a serial communication port, one end of the dual-channel optocoupler is electrically connected to the mains, and the other end is electrically connected to the host computer through a serial communication port, and the dual-channel optocoupler is also electrically connected to the second thyristor optocoupler;

[0009] One end of the switching power supply module is electrically connected to the mains, and the other end supplies power to the sine wave detection module, the motor control module, and the zero-crossing detection module.

[0010] Preferably, the sinusoidal wave detection module also includes a third thyristor optocoupler and a second transistor, the second end of the third thyristor optocoupler is electrically connected to the collector of the second transistor, the first end of the third thyristor optocoupler is used for power supply, the third end of the third thyristor optocoupler is electrically connected to the mains, the fourth end of the third thyristor optocoupler is electrically connected to the primary side of the mutual inductor, and the emitter and base of the second transistor are connected and then electrically connected to the serial communication port.

[0011] Preferably, the motor control module further includes a first transistor, the collector of the first transistor is electrically connected to the first thyristor optocoupler, the emitter of the first transistor is grounded, and the base of the first transistor is electrically connected to the serial communication port.

[0012] Preferably, the optocoupler current limiting element is two resistors connected in series.

[0013] Preferably, the two resistors are 100 kΩ and 1 / 2 W.

[0014] Preferably, the zero-crossing detection module further includes a third transistor, the collector of the third transistor is electrically connected to the second thyristor optocoupler, and the emitter and base of the third transistor are connected and then electrically connected to the serial communication port.

[0015] Preferably, the switching power supply module includes a converter chip and a power management chip, the input end of the converter chip is electrically connected to the power management chip and the mains, the power management chip is electrically connected to the mains, and the output end of the converter chip is electrically connected to the sinusoidal wave detection module, the motor control module and the zero-crossing detection module.

[0016] Preferably, the converter chip is TPS5430DDAR.

[0017] Preferably, the power management chip is a DC to DC power management chip.

[0018] Preferably, the model of the power management chip is SDH8666QA.

[0019] Compared with the prior art, this application has at least the following beneficial effects:

[0020] The present application provides a power supply control and signal acquisition device, including a sine wave detection module, a motor control module, a zero-crossing detection module and a switching power supply module. The sine wave detection module includes a mutual inductor and an amplifier, the motor control module includes a bidirectional thyristor and a first thyristor optocoupler, and the zero-crossing detection module includes a second thyristor optocoupler, an optocoupler current-limiting element and a dual-channel optocoupler. The sine wave detection module converts strong electricity into a weak electric signal through a mutual inductor and then amplifies and outputs it through an amplifier, which not only has low loss but also achieves electrical isolation and high safety. The motor control module has a fast response speed through optocoupler control, a small size, a long life, and a light weight. It can trigger the bidirectional thyristor at different times as needed to achieve continuous regulation of the AC power supply. The zero-crossing detection module circuit will only work when zero-crossing detection is required, and does not consume electricity at other times, thereby reducing loss and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more intuitively illustrate the prior art and the present application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be considered as limiting conditions for implementing the present application; for example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are capable of easily making routine adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components).

[0022] Figure 1 A circuit block diagram of a power supply control and signal acquisition device provided in this application;

[0023] Figure 2 The circuit schematic diagram of the sine wave detection module provided in this application;

[0024] Figure 3 The motor control module circuit schematic provided for this application;

[0025] Figure 4 The circuit schematic diagram of the zero-crossing detection module provided in this application;

[0026] Figure 5 The circuit diagram of the switching power supply module provided for this application;

[0027] Figure 6This is a workflow diagram of a power supply control and signal acquisition device provided in this application.

[0028] Description of reference numerals:

[0029] 1. Sine wave detection module; 101. Amplifier; 102. Transformer; 2. Motor control module; 201. First thyristor optocoupler; 202. Bidirectional thyristor; 3. Zero-crossing detection module; 301. Second thyristor optocoupler; 302. Dual-channel optocoupler; 303. Optocoupler current-limiting element; 4. Switching power supply module; 5. AC power; 6. Serial communication port; 7. Host computer. DETAILED DESCRIPTION

[0030] The present application will be further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0031] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0032] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the convenience of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0033] See also Figure 1 The present application provides a power supply control and signal acquisition device, including a sine wave detection module 1, a motor control module 2, a zero-crossing detection module 3 and a switching power supply module 4. The sine wave detection module 1 includes a mutual inductor 102 and an amplifier 101, the motor control module 2 includes a bidirectional thyristor 202 and a first thyristor optocoupler 201, and the zero-crossing detection module 3 includes a second thyristor optocoupler 301, an optocoupler current limiting element 303 and a dual-channel optocoupler 302.

[0034] The primary side of the mutual inductor 102 is electrically connected to the mains 5, the secondary side of the mutual inductor 102 is electrically connected to the input end of the amplifier 101, and the output end of the amplifier 101 is electrically connected to the host computer 7 through the serial communication port 6; one end of the bidirectional thyristor 202 is electrically connected to the mains 5, and the other end is electrically connected to one end of the first thyristor optocoupler 201, and the other end of the first thyristor optocoupler 201 is electrically connected to the host computer 7 through the serial communication port 6; the second thyristor optocoupler 301 and the optocoupler current limiting element 303 are connected in series, and one end is electrically connected to the mains 5, and the other end is electrically connected to the host computer 7 through the serial communication port 6; one end of the dual-channel optocoupler 302 is electrically connected to the mains 5, and the other end is electrically connected to the host computer 7 through the serial communication port 6, and the dual-channel optocoupler 302 is also electrically connected to the second thyristor optocoupler 301.

[0035] One end of the switching power supply module 4 is electrically connected to the mains 5 , and the other end supplies power to the sine wave detection module 1 , the motor control module 2 and the zero-crossing detection module 3 .

[0036] In a power supply control and signal acquisition device provided by the present application, a sine wave detection module 1 converts a strong current (mains power 5) into a weak current small signal through a mutual inductor 102 and then amplifies and outputs it through an amplifier 101. This not only has low loss, but also achieves electrical isolation and high safety. The motor control module 2 has a fast response speed through optocoupler control, a small size, a long life, and a light weight. It can trigger a bidirectional thyristor 202 at different times as needed to achieve continuous regulation of the AC power supply. The zero-crossing detection module 3 will only work when zero-crossing detection is required, and does not consume electricity at other times.

[0037] For details, please refer to Figure 2 The sine wave detection module 1 includes a mutual inductor 102 and an amplifier 101. Figure 2 In FIG. 1 , the mutual inductor 102 is labeled L1 and the amplifier 101 is labeled U10B.

[0038] More specifically, the sinusoidal wave detection module 1 also includes a third thyristor optocoupler U8 and a second transistor Q2, the second end 2 of the third thyristor optocoupler U8 is electrically connected to the collector of the second transistor Q2, the first end 1 of the third thyristor optocoupler U8 is used for power supply, the third end 6 of the third thyristor optocoupler U8 is electrically connected to the mains, the fourth end 4 of the third thyristor optocoupler U8 is electrically connected to the primary side of the mutual inductor 102 (L1 in the circuit schematic diagram), and the emitter and base of the second transistor Q2 are connected and then electrically connected to the serial communication port 6 (COM in the circuit schematic diagram).

[0039] For details, please refer to Figure 3 The motor control module 2 includes a bidirectional thyristor 202 and a first thyristor optocoupler 201. Figure 3In the figure, the bidirectional thyristor 202 is labeled SCR1, the first thyristor optocoupler 201 is labeled U1, and the model is CT3052.

[0040] More specifically, the motor control module 2 further includes a first transistor Q3 , a collector of the first transistor Q3 being electrically connected to the first thyristor optocoupler 201 ( U1 ), an emitter of the first transistor Q3 being grounded, and a base of the first transistor Q3 being electrically connected to the serial communication port 6 (COM).

[0041] For details, please refer to Figure 4 The zero-crossing detection module 3 includes a second thyristor optocoupler 301, an optocoupler current limiting element 303 and a dual-channel optocoupler 302. Figure 4 In the figure, the second thyristor optocoupler 301 is labeled U5 and its model is CT3052; the optocoupler current limiting element 303 is two resistors R11 and R12 connected in series, and the size of the two resistors R11 and R12 are both 100kΩ, 1 / 2W; the dual-channel optocoupler is labeled U3 and its model is EL827.

[0042] The present application adopts an active control method to realize zero-crossing detection control, which is beneficial to two optocouplers. The control end of one optocoupler is on the secondary side, and the control end of the other optocoupler is the primary mains power. In addition, the double tube can ensure that both the positive half-cycle and the negative half-cycle can be detected. The zero-crossing detection circuit using the optocoupler changes the output state by performing zero-crossing detection with the help of the diode conduction and the optocoupler isolation characteristics. For 220V AC input, the optocoupler current-limiting resistor needs to be reasonably selected. The present application adopts two 100kΩ, 1 / 2W resistors in series. The zero-crossing detection module 3 provided in the present application can significantly reduce power consumption while meeting the requirements of electrical isolation.

[0043] Specifically, unidirectional optocouplers typically only detect in one direction of the AC signal. For example, when the AC signal is in the positive half-cycle, the unidirectional optocoupler may conduct and generate an output signal, but not conduct during the negative half-cycle. By monitoring the unidirectional optocoupler's output signal, it is possible to determine the AC signal's zero crossing in a specific direction. However, since it can only detect in one direction, it has certain limitations for applications that require comprehensive understanding of the AC signal's zero crossings. Dual-channel optocouplers, on the other hand, can detect in both the positive and negative half-cycles of the AC signal. Regardless of the AC signal's direction, the dual-channel optocoupler can conduct or cut off according to the signal changes and generate a corresponding output signal. This enables dual-channel optocouplers to provide more comprehensive information for zero-crossing detection, accurately capturing the AC signal's zero crossing. Combining unidirectional and dual-channel optocouplers can improve the accuracy and reliability of zero-crossing detection. The complementary effects of the two optocouplers enable more comprehensive monitoring of the AC signal's zero crossings, reducing the possibility of false detections, and enabling active control of zero-crossing detection time and losses.

[0044] For details, please refer to Figure 5 The switching power supply module 4 includes a converter chip U7 and a power management chip U6. The input end of the converter chip U7 is electrically connected to the power management chip U6 and the mains. The power management chip U6 is electrically connected to the mains. The output end of the converter chip U7 is electrically connected to the sine wave detection module 1, the motor control module 2 and the zero-crossing detection module 3.

[0045] More specifically, the power management chip U6 is a DC to DC (direct current to direct current) power management chip, preferably model SDH8666QA. The SDH8666QA has a built-in high-voltage, high-power MOSFET for use in 36W adapters or 48W open environments, and is suitable for devices such as universal adapters, fast chargers, monitors, and flat-panel TVs. It has multiple mode control, including QR (quasi-resonant) mode, PWM (pulse width modulation) + PFM (pulse frequency modulation) mode, and Burst Mode (burst mode), etc., to optimize efficiency and reduce EMI noise. In addition, the SDH8666QA also has a VCC HOLD function to prevent the chip from restarting due to undervoltage during light load or dynamic switching, and has comprehensive protection functions including VCC OVP, OCP, OTP, Brown In / Brown Out, etc.

[0046] More specifically, converter chip U7 uses the TPS5430DDAR chip, which is a high-output current step-down DC / DC converter that integrates a low-resistance, high-side N-channel MOSFET. The main features of this chip include a wide input voltage range (5.5V to 36V), the ability to provide up to 3A of continuous output current, up to 95% conversion efficiency, and internal compensation to reduce the number of external components. In addition, it also includes protection functions such as overcurrent protection, overvoltage protection, and thermal shutdown, as well as a fixed switching frequency of 500kHz.

[0047] See also Figure 6The working principle of a power supply control and signal acquisition device provided in this application is as follows: when AC mains power is connected, the switching power supply module 4 starts working and supplies power to the sine wave detection module 1, the motor control module 2, and the zero-crossing detection module 3, while also having external output capability; the sine wave detection module 1, the motor control module 2, and the zero-crossing detection module 3 require corresponding signals from the host computer 7 to realize their functions; the zero-crossing detection module 3 is used to detect the zero point of the input voltage; the sine wave detection module 1 is used to detect the input voltage waveform, and the motor control module 2 controls the switching of the AC mains power on the motor; the zero-crossing detection signal and the sine wave detection signal are output to the host computer 7, and the motor control module 2 is controlled by the program. It should be noted that the host computer 7 controls the motor control module 2 through a conventional program, and this application does not improve the program.

[0048] This application provides a power control and signal acquisition device suitable for power control and signal acquisition of household appliances. By building a hardware architecture for signal acquisition and signal control, it facilitates host computer software control. Traditional power control typically includes voltage regulation, current control, and on / off control. However, this application not only includes the power supply of traditional power control, but also includes signal acquisition and signal control, which not only reduces circuit size and assembly difficulty, but also saves overall cost.

[0049] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A power supply control and signal acquisition device, characterized in that: It includes a sine wave detection module, a motor control module, a zero-crossing detection module and a switching power supply module. The sine wave detection module includes a mutual inductor and an amplifier. The motor control module includes a bidirectional thyristor and a first thyristor optocoupler. The zero-crossing detection module includes a second thyristor optocoupler, an optocoupler current limiting element and a dual-channel optocoupler. The primary side of the mutual inductor is electrically connected to the mains, the secondary side of the mutual inductor is electrically connected to the input end of the amplifier, and the output end of the amplifier is electrically connected to the host computer through a serial communication port; one end of the bidirectional thyristor is electrically connected to the mains, and the other end is electrically connected to one end of the first thyristor optocoupler, and the other end of the first thyristor optocoupler is electrically connected to the host computer through a serial communication port; the second thyristor optocoupler and the optocoupler current-limiting element are connected in series, and one end is electrically connected to the mains, and the other end is electrically connected to the host computer through a serial communication port, one end of the dual-channel optocoupler is electrically connected to the mains, and the other end is electrically connected to the host computer through a serial communication port, and the dual-channel optocoupler is also electrically connected to the second thyristor optocoupler; One end of the switching power supply module is electrically connected to the mains, and the other end supplies power to the sine wave detection module, the motor control module, and the zero-crossing detection module.

2. The power supply control and signal acquisition device according to claim 1, characterized in that: The sine wave detection module also includes a third thyristor optocoupler and a second transistor, the second end of the third thyristor optocoupler is electrically connected to the collector of the second transistor, the first end of the third thyristor optocoupler is used for power supply, the third end of the third thyristor optocoupler is electrically connected to the mains, the fourth end of the third thyristor optocoupler is electrically connected to the primary side of the mutual inductor, and the emitter and base of the second transistor are connected and then electrically connected to the serial communication port.

3. The power control and signal acquisition device according to claim 1, characterized in that: The motor control module further includes a first transistor, a collector of the first transistor is electrically connected to the first thyristor optocoupler, an emitter of the first transistor is grounded, and a base of the first transistor is electrically connected to the serial communication port.

4. The power control and signal acquisition device according to claim 1, characterized in that: The optocoupler current limiting element is two resistors connected in series.

5. The power supply control and signal acquisition device according to claim 4, characterized in that: The two resistors are 100kΩ, 1 / 2W.

6. The power supply control and signal acquisition device according to claim 1, characterized in that: The zero-crossing detection module further includes a third transistor, the collector of the third transistor is electrically connected to the second thyristor optocoupler, and the emitter and base of the third transistor are connected and then electrically connected to the serial communication port.

7. The power control and signal acquisition device according to claim 1, characterized in that: The switching power supply module includes a converter chip and a power management chip, the input end of the converter chip is electrically connected to the power management chip and the mains, the power management chip is electrically connected to the mains, and the output end of the converter chip is electrically connected to the sine wave detection module, the motor control module and the zero-crossing detection module.

8. The power supply control and signal acquisition device according to claim 7, characterized in that: The model of the converter chip is TPS5430DDAR.

9. The power supply control and signal acquisition device according to claim 7, characterized in that: The power management chip is a DC-to-DC power management chip.

10. The power supply control and signal acquisition device according to claim 9, characterized in that: The model of the power management chip is SDH8666QA.

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