Power supply driver for stably outputting positive and negative voltages and system thereof
By using an input voltage divider circuit, a magnetic flux voltage regulation circuit, and an integrated protection circuit, combined with a Hall sensor and a magnetic flux adjustable transformer, the voltage is dynamically balanced, solving the problems of output instability and cross-interference of bipolar power supplies, and achieving high efficiency, stability, and protection of the circuit.
Patent Information
- Application Number
- CN202511231072.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-30
- Publication Date
- 2025-11-18
AI Technical Summary
Existing bipolar power supplies suffer from load asymmetry drift, output voltage imbalance, transient response hysteresis, and cross-interference problems, and lack circuit protection measures for the power supply and driver.
It employs an input voltage divider circuit, a magnetic flux voltage regulation circuit, an integrated protection circuit, and a voltage output control circuit. Combined with a Hall sensor array and a magnetic flux adjustable transformer, it dynamically balances positive and negative voltages, sets up a synchronous rectifier and a dynamic weight controller, and integrates multiple protectors to form a highly efficient closed-loop circuit system.
It achieves stability and symmetry of positive and negative output voltages, reduces cross interference, provides circuit protection to avoid damage, and improves the stability and reliability of the power driver.
Smart Images
Figure CN120979160A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power supply technology, and in particular to a power driver and system for stabilizing positive and negative voltage output. Background Technology
[0002] A power driver typically refers to an electronic device or circuit module whose main function is to receive input power (usually from a mains power supply or battery), perform necessary conversion, regulation, and control, and then output electrical energy suitable for driving specific loads (such as motors, LED lights, solenoid valves, etc.). Its core role is to provide precisely controlled power, not just simple power supply. The core elements of a power driver mainly include: power conversion and regulation, control interface, power amplification, protection functions, and efficiency.
[0003] Currently, bipolar power supplies have three major problems: (1) load asymmetry drift, with the difference between positive and negative loads leading to output voltage imbalance; (2) transient response hysteresis, with the response time of traditional dual closed-loop control being >100us; and (3) cross interference, with the positive and negative output stages generating ripple coupling through a common ground path. In addition, the circuit protection of bipolar power supplies and their loads focuses more on protecting the internal circuits of the load, while no protection measures are taken for the circuits of the power supply and driver. Summary of the Invention
[0004] To address the aforementioned technical problems, this invention provides a power driver and its system for stable positive and negative voltage output. The power driver's housing structure comprises a base plate and a top cover mounted on the base plate. The top cover has several heat dissipation holes on all four sides. One side of the top cover has an input terminal, and the other side has a positive output terminal and a negative output terminal. An integrated circuit board is located on the top surface of the base plate, inside the top cover. From the input terminal side to the two output terminals side, the integrated circuit board has, in sequence, an input voltage divider circuit, a magnetic flux regulation circuit, an integrated protection circuit, and a voltage output control circuit. The input voltage divider circuit performs local voltage regulation on the input power supply through an EMI filter, and then combines it with a GaN half-bridge to perform high-efficiency, low-loss conversion on the regulated power input. The magnetic flux voltage regulation circuit is based on a Hall sensor array and uses a magnetic flux adjustable transformer to dynamically balance the positive and negative voltage deviations by adjusting the correction magnetic flux. The integrated protection circuit includes an overcurrent protector, an overvoltage protector, an undervoltage protector, an overheat protector, and a short-circuit protector. The voltage output control circuit includes a positive synchronous rectifier and a negative synchronous rectifier. After dynamic balancing by the magnetic flux voltage regulation circuit, the positive and negative voltages pass through the rectifiers again for adaptive load balancing, reducing voltage cross-interference between the positive and negative poles and ensuring the symmetry and stability of the output voltage.
[0005] Further preferred scheme: The main adjustment scheme of the flux-adjustable transformer is as follows: it consists of a positive winding, a negative winding, a flux sensing area, and a compensation winding, and the Hall sensor array can use 4 A Hall array of 4 is arranged and embedded in the air gap of the magnetic core.
[0006] Further preferred options: Both the positive and negative windings can be constructed using a 3-layer PCB spiral winding, and the compensation winding can be constructed using 0.5mm enameled wire with 3 turns through the core.
[0007] A further preferred embodiment: the overcurrent protector, overheat protector, and short-circuit protector are connected in series, and the overvoltage protector and the undervoltage protector are connected in parallel in the series circuit of the overcurrent protector, overheat protector, and short-circuit protector, respectively.
[0008] A further preferred embodiment: The positive synchronous rectifier consists of a positive voltage sampling and error amplifier. By sampling the positive output voltage and comparing it with a reference voltage, the error signal is amplified.
[0009] A further preferred embodiment: The negative synchronous rectifier consists of a negative voltage sampler and a transconductance amplifier. By sampling the negative output voltage, the voltage error is converted into a current signal.
[0010] A further preferred option is that the positive synchronous rectifier and the negative synchronous rectifier are dynamically adjusted and compensated for the load imbalance of the positive and negative poles through a dynamic weight controller.
[0011] Further optimization scheme: The dynamic weight controller realizes dynamic weight calculation by using an analog multiplier. The generation circuit calculates the load imbalance through an absolute value circuit and a low-pass filter, and finally outputs the compensation current. Then, the magnetic flux compensation engine converts the compensation current into magnetic flux compensation quantity and feeds it back to the magnetic flux voltage regulation circuit. Thus, based on the magnetic flux compensation of the voltage difference, an efficient and closed-loop circuit system structure is formed.
[0012] The beneficial effects of this invention are reflected in: First, by setting up synchronous rectifiers for the positive and negative output voltages respectively, cross interference can be reduced. The difference in output voltage can be dynamically balanced by a dynamic weight controller, and the difference can be converted into a magnetic flux compensation quantity for voltage regulation, thus forming an efficient and closed dynamic voltage regulation circuit system.
[0013] Secondly, it integrates multiple circuit protection structures, which can cope with short circuits, open circuits, overheating and other situations that occur in the power driver and load, and avoid irreversible damage to the power driver and load. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the disassembly structure of the power driver of the present invention; Figure 2 This is a schematic diagram of the external overall structure of the power driver of the present invention; Figure 3 This is a schematic diagram of the control system architecture of the present invention; Figure 4 This is a schematic diagram of the flux-adjustable transformer system of the present invention; Figure 5 This is a schematic diagram of the integrated protection circuit system of the present invention.
[0015] Reference numerals: 1. Power driver; 2. Top cover; 3. Positive output terminal; 4. Negative output terminal; 5. Heat dissipation hole; 6. Base plate; 7. Input terminal; 8. Integrated circuit board; 9. Input voltage divider circuit; 10. Flux regulation circuit; 11. Integrated protection circuit; 1101. Overcurrent protector; 1102. Overvoltage protector; 1103. Undervoltage protector; 1104. Overheat protector; 1105. Short circuit protector; 12. Voltage output control circuit; 13. EMI filter; 14. GaN half-bridge; 15. Hall sensor array; 16. Flux-adjustable transformer; 1601. Positive winding; 1602. Negative winding; 1603. Flux sensing area; 1604. Compensation winding; 17. Positive synchronous rectifier; 18. Negative synchronous rectifier. Detailed Implementation
[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0017] Example 1: Reference Figure 1 , Figure 2The housing structure of the power driver 1 consists of a base plate 6 and a top cover 2 mounted on the base plate 6. The top cover 2 has several heat dissipation holes 5 on all four sides. One side of the top cover 2 has an input terminal 7, and the other side has a positive output terminal 3 and a negative output terminal 4. An integrated circuit board 8 is mounted on the top surface of the base plate 6 and inside the top cover 2. From the input terminal 7 side to the two output terminals side, the integrated circuit board 8 has an input voltage divider circuit 9, a magnetic flux voltage regulation circuit 10, an integrated protection circuit 11, and a voltage output control circuit 12 arranged sequentially.
[0018] Example 2: Reference Figure 3 , Figure 4 The input voltage divider circuit 9 performs local voltage regulation on the input power supply through the EMI filter 13, and then combines it with the GaN half-bridge 14 to perform high-efficiency, low-loss conversion of the regulated power input; the magnetic flux regulating circuit 10, based on the Hall sensor array 15, dynamically balances the positive and negative voltage deviations by adjusting the magnetic flux through the magnetic flux adjustable transformer 16; the main adjustment scheme of the magnetic flux adjustable transformer 16 is as follows: it consists of a positive winding 1601, a negative winding 1602, a magnetic flux sensing area 1603, and a compensation winding 1604, and the Hall sensor array 15 can adopt 4 The Hall array is arranged in 4 layers and embedded in the air gap of the magnetic core. Both the positive winding 1601 and the negative winding 1602 can be made of 3-layer PCB spiral winding. The compensation winding 1604 can be made of 0.5mm enameled wire with 3 turns through the core.
[0019] Example 3: Reference Figure 3 The voltage output control circuit 12 includes a positive synchronous rectifier 17 and a negative synchronous rectifier 18. After dynamic balancing by the magnetic flux voltage regulation circuit 10, the positive and negative voltages pass through the rectifiers again to achieve adaptive load balancing, reduce voltage cross-interference between the positive and negative poles, and ensure the symmetry and stability of the output voltage. The positive synchronous rectifier 17 consists of a positive voltage sampler and an error amplifier. By sampling the positive output voltage and comparing it with the reference voltage, it amplifies the error signal. The negative synchronous rectifier 18 consists of a negative voltage sampler and a transconductance amplifier. By sampling the negative output voltage, it converts the voltage error into a current signal. The positive and negative synchronous rectifiers 17 and 18 are dynamically adjusted and compensated for the load imbalance through a dynamic weight controller. The dynamic weight controller calculates the dynamic weight using an analog multiplier. The generation circuit calculates the load imbalance through an absolute value circuit and a low-pass filter, and finally outputs a compensation current. The compensation current is then converted into a magnetic flux compensation amount by the magnetic flux compensation engine and fed back to the magnetic flux voltage regulation circuit 10. Thus, a high-efficiency, closed-loop circuit system structure is formed based on the magnetic flux compensation of the voltage difference.
[0020] Example 4: Reference Figure 3 , Figure 5 The integrated protection circuit 11 includes an overcurrent protector 1101, an overvoltage protector 1102, an undervoltage protector 1103, an overheat protector 1104, and a short-circuit protector 1105. The overcurrent protector 1101, overheat protector 1104, and short-circuit protector 1105 are connected in series. The overvoltage protector 1102 and the undervoltage protector 1103 are connected in parallel with the series circuit of the overcurrent protector 1101, overheat protector 1104, and short-circuit protector 1105. By integrating multiple circuit protectors onto the power driver 1 body, both internal circuit problems of the power driver 1 and internal circuit problems of the load can be addressed, thus providing simultaneous circuit system protection for both the power driver 1 and the load.
[0021] Existing enterprise data servers are basically composed of several hosts inserted horizontally into a rack, with small spacing between adjacent hosts, which makes it difficult to dissipate heat. The present invention creates a tilted host placement state, which, combined with the physical characteristic that heat is dissipated upwards, can greatly improve the heat dissipation efficiency from the physical structure of the rack 7, thereby improving the performance of the server hardware 6.
[0022] In the description of the embodiments of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "center," "top," "bottom," "top," "bottom," "inner," "outer," "inner side," and "outer side," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. "Inner side" refers to the interior or enclosed area or space. "Outer perimeter" refers to the area surrounding a specific component or specific area.
[0023] In the description of embodiments of the present invention, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more.
[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.
[0025] In the description of embodiments of the present invention, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.
[0026] In the description of the embodiments of the present invention, it should be understood that "-" and "~" represent a range of two numerical values, and this range includes the endpoints. For example, "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.
[0027] In the description of embodiments of the present invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A power supply driver and system for stabilizing positive and negative voltage output, characterized in that, The device includes a power driver (1), the housing structure of which consists of a base plate (6) and a top cover (2) disposed on the base plate (6). The top cover (2) has several heat dissipation holes (5) on all four sides. The top cover (2) has an input terminal (7) on one side and a positive output terminal (3) and a negative output terminal (4) on the other side. An integrated circuit board (8) is disposed on the top surface of the base plate (6) and inside the top cover (2). An input voltage divider circuit (9), a magnetic flux voltage regulation circuit (10), an integrated protection circuit (11), and a voltage output control circuit (12) are disposed sequentially on the surface of the integrated circuit board (8) from the input terminal (7) side to the two output terminals side. The input voltage divider circuit (9) performs local voltage regulation on the input power supply through the EMI filter (13), and then combines the GaN half-bridge (14) to perform high-efficiency, low-loss conversion on the regulated power supply input. The magnetic flux voltage regulation circuit (10) is based on the Hall sensor array (15) and uses a magnetic flux adjustable transformer (16) to dynamically balance the positive and negative voltage deviation by adjusting the magnetic flux. The integrated protection circuit (11) includes an overcurrent protector (1101), an overvoltage protector (1102), an undervoltage protector (1103), an overheat protector (1104), and a short circuit protector (1105). The voltage output control circuit (12) includes a positive synchronous rectifier (17) and a negative synchronous rectifier (18). After dynamic balancing by the magnetic flux voltage regulation circuit (10), the positive and negative voltages are then rectified to achieve adaptive load balancing, reducing voltage cross-interference between the positive and negative poles and ensuring the symmetry and stability of the output voltage.
2. The power driver and system thereof for stable positive and negative voltage output according to claim 1, characterized in that: The main adjustment scheme of the flux-adjustable transformer (16) is as follows: it consists of a positive winding (1601), a negative winding (1602), a flux sensing area (1603), and a compensation winding (1604), and the Hall sensor array (15) can be 4 A Hall array of 4 is arranged and embedded in the air gap of the magnetic core.
3. A power driver and system for stable positive and negative voltage output according to claim 2, characterized in that: Both the positive winding (1601) and the negative winding (1602) can be made of 3-layer PCB spiral winding, and the compensation winding (1604) can be made of 0.5mm enameled wire with 3 turns through the core.
4. A power driver and system for stable positive and negative voltage output according to claim 1, characterized in that: The overcurrent protector (1101), overheat protector (1104), and short circuit protector (1105) are connected in series, and the overvoltage protector (1102) and the undervoltage protector (1103) are connected in parallel in the series circuit of the overcurrent protector (1101), overheat protector (1104), and short circuit protector (1105).
5. A power driver and system for stable positive and negative voltage output according to claim 1, characterized in that: The positive synchronous rectifier (17) consists of a positive voltage sampling and error amplifier. It samples the positive output voltage, compares it with the reference voltage, and amplifies the error signal.
6. A power driver and system for stable positive and negative voltage output according to claim 1, characterized in that: The negative synchronous rectifier (18) consists of a negative voltage sampler and a transconductance amplifier. By sampling the negative output voltage, the voltage error is converted into a current signal.
7. A power driver and system for stabilizing positive and negative voltage output according to claim 1, characterized in that: The positive synchronous rectifier (17) and the negative synchronous rectifier (18) are dynamically adjusted and compensated for the load imbalance of the positive and negative poles through a dynamic weight controller.
8. A power driver and system for stable positive and negative voltage output according to claim 7, characterized in that: The dynamic weight controller uses an analog multiplier to calculate the dynamic weight. The generation circuit calculates the load imbalance through an absolute value circuit and a low-pass filter, and finally outputs the compensation current. The compensation current is then converted into a magnetic flux compensation quantity by the magnetic flux compensation engine and fed back to the magnetic flux voltage regulation circuit (10). Thus, based on the magnetic flux compensation of the voltage difference, an efficient and closed-loop circuit system structure is formed.