Adjustable voltage pulsation adapter

Abstract

The utility model discloses an adjustable voltage pulsation adapter, which comprises an input filter, a bridge rectifier, an active PFC (Power Factor Correction), an analog controller and a DCDC (Direct Current to Direct Current) converter, after being connected to the input filter, commercial power is rectified by the bridge rectifier and then input to the active PFC. The output end of the active PFC is connected with the input end of the DCDC converter; and the rectification part of the DCDC converter directly outputs. Compared with the prior art, under the condition that direct-current square waves are effectively guaranteed, pulsating waveforms are independently controlled, the power characteristic of pulsating voltage is improved, pulsating voltage of any base point is achieved, and output pulsating voltage and direct-current base point voltage can be adjusted and set. The design can meet the requirements for different pulsating voltage auxiliary values and different frequencies, and the adaptability in different industries is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of adapters, in particular to an adjustable voltage pulsation adapter. Background Art

[0002] Most pulsating power supplies on the market have different design solutions in different occasions, which makes it difficult to meet the power requirements of the industry and difficult to be universal between different industries. In view of such problems, we propose an adjustable voltage pulsating adapter to solve the problem of market industry application. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model discloses an adjustable voltage pulsation adapter, comprising an input filter, a bridge rectifier, an active PFC, an analog controller, and a DCDC converter; after the mains is connected to the input filter, it is rectified by the bridge rectifier and then input to the active PFC; the output end of the active PFC is connected to the input end of the DCDC converter; the rectifier part of the DCDC converter is directly output; the analog controller is a TMS320F28035 controller, which is respectively connected to an output pulsating voltage detection VAS1, an output DC detection VAS2, and an output pulsating current detection VAS3 through an operational amplifier; the DCDC converter adopts a high-integration, high-efficiency multi-stage cascade structure; and the DCDC converter outputs a DC square wave output as a base point.

[0004] As a preferred technical solution of the utility model, the input filter, the bridge rectifier, the active PFC, the analog controller, and the DCDC converter all use wide temperature devices.

[0005] As a preferred technical solution of the utility model, the output pulsating voltage detection VAS1 and the output DC detection VAS2 detect the output voltage.

[0006] As a preferred technical solution of the utility model, the output pulsating voltage detection VAS1 divides the pulsating voltage into 50K equal parts per cycle, constrains the voltage value of each part so that its voltage presents a sawtooth wave shape. At the same time, in each cycle of the sawtooth waveform, the output DC part is kept open through GB, otherwise it is closed.

[0007] Beneficial effects of the utility model: Under the condition of effectively ensuring the DC square wave, the pulsating waveform is controlled separately, the power characteristics of the pulsating voltage are improved, the pulsating voltage of any base point is realized, and the output pulsating voltage and the DC base point voltage can be adjusted and set. This design can adapt to the requirements of different pulsating voltage sub-values ​​and different frequencies, and improves the adaptability in different industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following will briefly introduce the drawings required for the specific implementation or the prior art description. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0009] Figure 1 This is a schematic diagram of the voltage pulsation adapter of the utility model;

[0010] Figure 2 This is a simplified diagram of the power output structure of the utility model;

[0011] Figure 3 This is the output connection diagram of the TMS320F28035 controller of the utility model; DETAILED DESCRIPTION

[0012] Example 1

[0013] like Figures 1 to 3 As shown, the utility model discloses an adjustable voltage pulsation adapter, including an input filter, a bridge rectifier, an active PFC, an analog controller, and a DCDC converter; after the mains is connected to the input filter, it is rectified by the bridge rectifier and then input to the active PFC; the output end of the active PFC is connected to the input end of the DCDC converter; the rectifier part of the DCDC converter is directly output; the analog controller is a TMS320F28035 controller, which is respectively connected to the output pulsating voltage detection VAS1, the output DC detection VAS2, and the output pulsating current detection VAS3 through an operational amplifier; the DCDC converter adopts a high-integration, high-efficiency multi-stage cascade structure; the DCDC converter outputs with a DC square wave output as the base point. The input filter, bridge rectifier, active PFC, analog controller, and DCDC converter all use wide temperature devices to meet the system's use environment and ensure the reliability of the equipment. The output pulsating voltage detection VAS1 divides the pulsating voltage into 50K equal parts per cycle, constrains the voltage value of each part, and makes the voltage present a sawtooth wave shape. At the same time, in each cycle of the sawtooth waveform, the output DC part is kept open through GB, otherwise it is closed, and the main power switch frequency reaches 500KHZ. The 50KHZ adjustment provides segmentation adjustment for the output pulsating voltage, so that the output pulsation reaches 10HZ. The pulsating output is directly connected to the DCDC rectification part, which reduces the output filtering effect and ensures the volatility and flexibility of the output voltage. The DC square wave output is used as the pulsating power base output, and it can be set to improve the flexibility of power supply application. The DC D3 diode loop is used for square wave base output, and D1 and D2 are used for pulsating voltage adjustment. The DC and pulsating voltage are adjusted separately, which is conducive to ensuring the output power characteristics.

[0014] Working principle of the utility model: the utility model outputs pulsating voltage detection VAS1, output DC detection VAS2, and output pulsating current detection VAS3. These three detections are connected to the TMS320F28035 controller through an operational amplifier, and waveform calculation is performed through the TMS320F28035 controller. The output pulsating voltage adopts a multi-stage cascade structure with high integration and high efficiency. The DC / DC converter of the power conversion system is digitally controlled. VAS1 and VAS2 detect the output voltage. VAS1 detects and controls the pulsating voltage, and divides each cycle of the pulsating voltage into 50K equal parts, constrains the voltage value of each part, so that its voltage presents a sawtooth wave shape. At the same time, in each cycle of the sawtooth waveform, the output DC part is kept open through GB, otherwise it is closed. The purpose is to use the DC part to provide energy for the output pulsating voltage, so that the load capacity of the pulsating voltage is improved, the main power switching frequency reaches 500KHZ, and the 50KHZ adjustment is used to provide segmentation adjustment for the output pulsating voltage, so that the output pulsation reaches 10HZ.

[0015] Components not described in detail herein are prior art.

[0016] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention, and modifications or deformations without creative labor are still within the scope of protection of the present invention.

Claims

1. An adjustable voltage ripple adapter, characterized in that: It includes an input filter, a bridge rectifier, an active PFC, an analog controller, and a DCDC converter; after the mains is connected to the input filter, it is rectified by the bridge rectifier and then input to the active PFC; the output end of the active PFC is connected to the input end of the DCDC converter; the rectifier part of the DCDC converter outputs directly; the analog controller is a TMS320F28035 controller, which is respectively connected to the output pulsating voltage detection VAS1, the output DC detection VAS2, and the output pulsating current detection VAS3 through an operational amplifier; the DCDC converter adopts a high-integration, high-efficiency multi-stage cascade structure; the DCDC converter outputs with a DC square wave output as a base point.

2. The adjustable voltage ripple adapter according to claim 1, characterized in that: Input filter, bridge rectifier, active PFC, analog controller, and DCDC converter all use wide temperature devices.

3. The adjustable voltage ripple adapter according to claim 1, characterized in that: The output pulsating voltage detection VAS1 and the output DC detection VAS2 detect the output voltage.

4. The adjustable voltage ripple adapter according to claim 3, characterized in that: The output pulsating voltage detection VAS1 divides the pulsating voltage into 50K equal parts per cycle, constrains the voltage value of each part, and makes the voltage present a sawtooth wave shape. At the same time, in each cycle of the sawtooth waveform, the output DC part is kept open through GB, otherwise it is closed.

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