Alternating current voltage-stabilized power source for processing only part of power

An AC regulated power supply and processing part technology, which is applied in the direction of converting AC power input into AC power output, output power conversion device, and DC power input into DC power output, etc., can solve the problems of high cost and large power supply. , to achieve the effect of reducing equipment cost, reducing equipment volume and simple installation

Inactive Publication Date: 2019-05-03
ZHEJIANG ACAD OF SCI & TECH FOR INSPECTION & QUARANTINE
6 Cites 2 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] The existing AC stabilized power supply is a full-power converter, and there is still a shortcoming, that is, the power capacity of the power supply must...
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Method used

When the present embodiment is used, when the AC input power supply voltage is lower than the target AC output voltage value, the rectifier works in the rectification state, and provides energy to the inverter by the DC/DC isolation converter, and the inverter works in the inverter Change the state, provide the positive difference voltage between the AC output and the AC input, so as to achieve the purpose of increasing the voltage; when the AC input power supply voltage is high and the target AC output voltage value, the inverter works in the rectification state, and through DC/DC The isolated converter supplies energy to the rectifier in the reverse direction. The rectifier works in the inverter state and feeds back the excess electric energy to the AC power supply side. outp...
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Abstract

The invention relates to an alternating current voltage-stabilized power source for processing only part of power, which solves deficiencies in the prior art, and is used for processing power flow caused by a difference value between output voltage and input voltage. The alternating current voltage-stabilized power source includes a power electronic transformation circuit used for processing the power of the difference value, a control circuit used for collecting amplitude and phase of the input voltage and constructing a control signal according to a voltage setting value provided by a human-machine interaction module, and the human-machine interaction module used for a user to set required voltage, wherein a control end of the power electronic transformation circuit is connected with thecontrol circuit, and the control circuit is connected with the human-machine interaction module.

Application Domain

Dc-dc conversionAc-ac conversion +1

Technology Topic

EngineeringPower flow +4

Image

  • Alternating current voltage-stabilized power source for processing only part of power
  • Alternating current voltage-stabilized power source for processing only part of power
  • Alternating current voltage-stabilized power source for processing only part of power

Examples

  • Experimental program(1)

Example Embodiment

[0026] The specific embodiments of the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0027] An AC regulated power supply that only handles part of the power (see attached Figure 2 to 4 ), used to process the power flow caused by the difference between the output voltage and the input voltage, including
[0028] Power electronic conversion circuit 4 for processing differential power;
[0029] The control circuit is used to collect the amplitude and phase of the input voltage, and construct a control signal according to the voltage setting value provided by the human-computer interaction module;
[0030] Human-computer interaction module 1, used for users to set the required voltage;
[0031] The control end of the power electronic conversion circuit is connected with the control circuit, and the control circuit is connected with the human-computer interaction module.
[0032] The power electronic conversion circuit includes a rectifier, a DC/DC converter and an inverter; the rectifier acts as a rectifier when the converter supplies power to a load, and acts as an inverter when the converter feeds power to the grid;
[0033] DC/DC converter is used to adjust and stabilize DC voltage;
[0034] The inverter acts as an inverter when the converter supplies power to the load, and acts as a rectifier when the converter feeds power to the grid. The rectifier, the DC/DC converter and the inverter are connected in sequence. The rectifier, DC/ The control terminals of the DC converter and the inverter are electrically connected to the control circuit. The control circuit includes a sampling circuit 3, a digital signal processor 5, and a driver 2. The digital signal processor is connected to the rectifier, the DC/DC converter, and the inverter through the sampling circuit. Connect with the control terminal of the rectifier, DC/DC converter and inverter. The human-computer interaction module is communicatively connected with the control circuit, the human-computer interaction module transmits a voltage setting instruction to the control circuit, and the human-computer interaction module receives the power state information from the control circuit. The rectifier includes a MOS tube rectifier bridge and an inductor L1. The first end of the inductor L1 is connected to the AC input power source. The second end of the inductor L1 is connected to the input end of the MOS tube rectifier bridge. The output end of the MOS tube rectifier bridge passes through DC/ The DC converter is connected to the input terminal of the inverter. The inverter includes a MOS tube inverter bridge, an inductor L3 and a capacitor C3. The output terminal of the MOS tube inverter bridge is connected to the first end of the inductor L3, and the output terminal of the inductor L3 The two ends of the capacitor C3 are AC output terminals. The gates of all MOS transistors in the MOS tube rectifier bridge and the MOS tube inverter bridge are connected to the digital signal processor through the driver. The rectifier, inverter The input terminal and the output terminal of the converter and the DC/DC converter are equipped with sampling circuits, and the sampling circuits are electrically connected to the processor. The DC/DC converter is an isolation topology DC/DC converter equipped with a high-frequency isolation transformer. The DC/DC converter includes an input rectifier bridge, a capacitor C1, a transformer T, an output rectifier bridge, and a capacitor C2. The input end of the input rectifier bridge is connected in parallel with a capacitor C1, and the input end of the input rectifier bridge is connected to the output end of the rectifier , The output end of the input rectifier bridge is connected to the input end of the output rectifier bridge through the transformer T, the output end of the output rectifier bridge is connected to the input end of the inverter, and the output end of the inverter is connected in parallel with a capacitor C2.
[0035] When this embodiment is used, when the AC input power supply voltage is lower than the target AC output voltage value, the rectifier works in the rectifying state, and provides energy to the inverter through the DC/DC isolation converter, and the inverter works in the inverter state. Provides the positive difference voltage between the AC output and the AC input to achieve the purpose of increasing the voltage; when the AC input power supply voltage is high and the target AC output voltage value, the inverter works in the rectification state and passes through the DC/DC isolation converter Provide energy to the rectifier in the reverse direction. The rectifier works in the inverter state and feeds the excess power back to the AC power supply side. The inverter absorbs the power to provide the AC output with a reverse differential voltage from the AC input, so as to achieve the AC output and reduce the voltage the goal of. Finally achieve the purpose of output voltage stability. The AC power supply proposed in this embodiment only processes the power flow caused by the difference between the output voltage and the input voltage. Compared with the traditional full-power conversion AC stabilized power supply, it can greatly reduce equipment costs and reduce equipment costs while meeting the power demand. Equipment volume. The AC power supply proposed in this embodiment is small in size, simple to install, easy to carry, does not change the electrical connection of the original electrical equipment, and is convenient to use and later maintain. The control circuit of this embodiment collects the voltage and current information of the output terminal, and can easily integrate the power meter function. The stabilized power supply solution can also achieve a small range of voltage regulation to simulate changes and fluctuations in the grid voltage.
[0036] The above-mentioned embodiment is only a preferred solution of the present invention, and does not limit the present invention in any form. There are other variations and modifications on the premise of not exceeding the technical solution described in the claims.

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