Digital control high-power power supply module

Abstract

The invention discloses a digital control high-power power supply module, which comprises a driving control circuit, a 540V auxiliary power supply circuit, a digital control circuit, two groups of LLC (Logical Link Control) conversion circuits and two groups of synchronous rectification circuits, the digital control circuit controls the two groups of driving chips to drive the two groups of LLC switching circuits and the synchronous rectification circuit to carry out power output by outputting PWM waves, and the digital control circuit is provided with a DSP digital processing chip; a voltage loop and current loop competition strategy is used, a PWM waveform is dynamically adjusted in real time to adjust an LLC conversion circuit and synchronous rectification driving so as to maintain stable and rapid output of the power supply module, a DSP digital processing chip is used as a zero voltage switch of a power device, the efficiency of the power supply module is improved, meanwhile, all devices of the power supply module are used in a modularized mode, and the cost is reduced. The power supply space utilization rate is maximized, and the production cost and the maintenance cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of DC / DC power converters, and more particularly to a 540V DC to 28V DC power conversion module, specifically a digitally controlled high-power power module. Background Technology

[0002] DC / DC power converters are switching power supply chips that utilize the energy storage characteristics of capacitors and inductors. They employ high-frequency switching via controllable switches such as MOSFETs to store input electrical energy in the capacitors / inductors. When the switch is open, the energy is released to the load, providing power. Traditional DC / DC power converters use analog circuits for control, requiring more electronic components to build protection and control circuits. Parameter adjustments are complex, and circuit design is complex for various protection logics, necessitating hardware state modifications to meet different needs. This results in low maintenance efficiency and high development costs. Furthermore, traditional DC / DC power converter modules have low output power and low output efficiency. Therefore, a digitally controlled high-power power module is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a digitally controlled high-power power supply module to solve the problems of low output efficiency, low maintenance efficiency, and high cost of traditional DC / DC power converter modules mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A digitally controlled high-power power supply module includes a drive control circuit, a 540V auxiliary power supply circuit, a digital control circuit, two sets of LLC converter circuits, and two sets of synchronous rectification circuits. The 540V auxiliary power supply circuit supplies power to the drive control circuit, the sampling circuit, and the digital control circuit. The drive control circuit has two sets of drive chips, and the digital control circuit controls the two sets of drive chips to drive the two sets of LLC converter circuits and the synchronous rectification circuits to output power by outputting PWM waves. Each set of LLC converter circuits has an LLC power transistor. The output terminal of the synchronous rectification circuit is connected to an output filter circuit. The digital control circuit has a DSP digital processing chip, and the input terminal of the digital control circuit is connected to a sampling circuit for voltage acquisition.

[0005] Furthermore, the sampling circuit and the digital control circuit transmit signals through a current control loop and a voltage control loop.

[0006] Furthermore, the digital control circuit is interconnected with a communication circuit.

[0007] The beneficial effects of this invention are: This invention utilizes a sampling circuit and a digital control circuit with a DSP digital processing chip to achieve high-precision, dynamically stable data acquisition, complex logic control, and nonlinear control algorithms. It employs a voltage loop and current loop competition strategy to acquire the output voltage and dynamically adjust the PWM waveform in real time to adjust the LLC converter circuit and synchronous rectification drive, thereby maintaining the power module's stable and fast output. Furthermore, it utilizes the DSP digital processing chip as a zero-voltage switch for power devices to improve the power module's efficiency. At the same time, the modular use of various components in the power module maximizes the utilization of power space and reduces production and maintenance costs.

[0008] This invention adopts an ISOP (input series, output parallel) architecture, which can effectively reduce the current stress on the module's power transistors. It uses digital control circuits as soft switches and zero-voltage switches to reduce the switching losses of power devices and improve the efficiency of the power module. Attached Figure Description

[0009] Figure 1 This is a schematic block diagram of the high-power power supply module of the present invention; Figure 2 This is a block diagram illustrating the control algorithm principle of the digital control circuit of the present invention.

[0010] In the diagram: 1. Drive control circuit; 2. 540V auxiliary power supply circuit; 3. Sampling circuit; 4. Digital control circuit; 5. Communication circuit; 6. Synchronous rectification circuit; 7. LLC power transistor; 8. Output filter circuit. Detailed Implementation

[0011] 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.

[0012] Please see Figure 1-2This invention provides a technical solution: a digitally controlled high-power power supply module, comprising a drive control circuit 1, a 540V auxiliary power supply circuit 2, a digital control circuit 4, two sets of LLC converter circuits, and two sets of synchronous rectification circuits. The 540V auxiliary power supply circuit 2 supplies power to the drive control circuit 1, the sampling circuit 3, and the digital control circuit 4. The drive control circuit 1 has two sets of drive chips, and the digital control circuit 4 controls the two sets of drive chips to drive the two sets of LLC switching circuits and the synchronous rectification circuit 6 to output power through the output PWM wave. Each set of LLC switching circuits has an LLC power transistor 7. The output terminal of the synchronous rectification circuit 6 is connected to an output filter circuit 8. The digital control circuit 4 has a DSP digital processing chip, and the input terminal of the digital control circuit 4 is connected to a sampling circuit 3 for voltage acquisition. The sampling circuit 3 and the digital control circuit 4 transmit signals through a current control loop and a voltage control loop. The digital control circuit 4 is interconnected with a communication circuit 5.

[0013] This digitally controlled high-power power supply module uses an LLC converter circuit with an LLC full-bridge series resonant topology. The module adopts an ISOP architecture, which can reduce the current stress on the primary and secondary switching transistors. Through the synchronous rectifier circuit 6, a large current output on the secondary side is achieved. Furthermore, the use of DSP digital processing chips can reduce the current stress on the switching transistors, achieve zero-voltage switching of power devices, and improve the efficiency of DC / DC power modules.

[0014] It should be noted that the DSP digital processing chip uses, but is not limited to, the TMS320F28335 DSP chip, which can meet the comprehensive needs of multiple functions such as analog signal acquisition, status signal acquisition, PWM waveform output, and fault reset. It adjusts the switching frequency through digital control to change the circuit gain and thus maintain stable output of the module. It uses a voltage loop and current loop competition strategy to dynamically adjust the PWM waveform in real time according to the output voltage and output current characteristics, and adjusts the LLC converter circuit and synchronous rectification drive to stabilize the output voltage.

[0015] This digitally controlled high-power power supply module features a 540V auxiliary power supply circuit 2 that can be connected to a power source. This circuit converts 540V DC to 28V DC, enabling the high-power module to have a rated output of 6KW. This improves the load capacity of the DC / DC power converter module, increases its efficiency, and enhances the comprehensiveness, precision, and dynamics of data acquisition. The module also includes an external analog-to-digital converter (AD) for high-precision, multi-channel analog signal acquisition. High-speed linear optocouplers and operational amplifiers are used for dynamic response, and the switching frequency is digitally controlled to adjust the circuit gain, thereby maintaining stable output.

[0016] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0017] The above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be understood that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. In the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can refer to a mechanical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Among these, there are various ways of detachable installation, such as by using a combination of plug-in and snap-fit, or by using bolt connections, etc.

[0018] 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 digitally controlled high-power power supply module, characterized in that: The system includes a drive control circuit, a 540V auxiliary power supply circuit, a digital control circuit, two sets of LLC converter circuits, and two sets of synchronous rectification circuits. The 540V auxiliary power supply circuit supplies power to the drive control circuit, the sampling circuit, and the digital control circuit. The drive control circuit has two sets of drive chips, and the digital control circuit controls the two sets of drive chips to drive the two sets of LLC switching circuits and the synchronous rectification circuits to output power by outputting PWM waves. Each set of LLC switching circuits has an LLC power transistor. The output terminal of the synchronous rectification circuit is connected to an output filter circuit. The digital control circuit has a DSP digital processing chip, and the input terminal of the digital control circuit is connected to a sampling circuit for voltage acquisition.

2. The digitally controlled high-power power supply module according to claim 1, characterized in that: The sampling circuit and the digital control circuit transmit signals through a current control loop and a voltage control loop.

3. The digitally controlled high-power power supply module according to claim 1, characterized in that: The digital control circuit is interconnected with a communication circuit.

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