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A sine wave power supply and its method for satisfying frequent on-off of inductive loads

An inductive load and sine wave technology, applied in the direction of electrical components, climate sustainability, high-efficiency power electronic conversion, etc., can solve problems such as not being able to meet the needs of use, and achieve the effects of good output dynamic response, wide operating temperature, and low cost

Active Publication Date: 2020-04-21
MIANYANG WEIBO ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing technology can no longer meet the needs of use

Method used

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  • A sine wave power supply and its method for satisfying frequent on-off of inductive loads
  • A sine wave power supply and its method for satisfying frequent on-off of inductive loads
  • A sine wave power supply and its method for satisfying frequent on-off of inductive loads

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as Figure 1-4 As shown, the present invention includes a sine wave power supply that satisfies the frequent switching of inductive loads, including

[0030] Sine wave generation module: DDS digital frequency synthesis technology is used to generate a sine wave signal of the required frequency and sent to the sine wave signal conditioning circuit; the generated sine wave has low frequency fluctuation rate, and the output frequency and amplitude are not affected by temperature. At the same time, the output frequency can be The advantage of easy adjustment.

[0031] Sine wave signal conditioning circuit: remove the DC component in the sine wave signal generated by the sine wave generation module, amplify the amplitude of the sine wave signal, and change to obtain two sets of sine wave signals with the same amplitude and a phase difference of 180°, and then Sequentially passed to the back class D power amplifier circuit 1 and class D power amplifier circuit 2 for pro...

Embodiment 2

[0038] This embodiment is preferably as follows on the basis of Embodiment 1: the sine wave generation module includes the capacitor C22 of AD9833EP chip, 10UF / 50V, the capacitor C24 of 0.1u and the capacitor C27 of 0.1u, between the port COMP and the port VDD of the AD9833EP chip Connect the capacitor C24 between them, connect the capacitor C27 between the port VDD and the port DGND of the AD9833EP chip, connect the pull-down capacitor C23 and C22 to the port CAP / 2.5V, connect the port VDD to the power supply VCC, connect the port DGND and the port AGND to ground, and connect the port VOUT Connect the signal output terminal VOUT. Among them, AD9833EP is a chip that generates sine wave signals. It can generate sine wave signals with required frequency through software control. The sine wave signal generated by this chip: 0.306 (sin2*π*400*t)+0.344; where t is a time variable, The unit is s, and the output sine wave is a sine wave with DC bias. This signal needs to be modulate...

Embodiment 3

[0057] An application of a sine wave power supply that satisfies the frequent on-off of inductive loads. It is used in an application environment that requires a large inductive load or resistive load as the output load, and requires continuous connection and disconnection of the sine wave power supply.

[0058] The sine wave power supply of the present invention can be used in the application environment where the inductive load that requires a large output load and requires continuous connection and disconnection of the sine wave power supply. The sine wave inverter on the market is frequently connected and disconnected When the load is off, there is a risk of damage to the conventional sine wave inverter due to the back electromotive force when the inductive load is disconnected. And our sine wave inverter has the following advantages: (1) The frequency of load on and off is 0-100Hz; (2) The output frequency fluctuation rate of the sine wave power supply is less than 0.25%; ...

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Abstract

The invention discloses a sine wave power source satisfying inductive load frequent connection and disconnection. The sine wave power source comprises a sine wave generating module, the sine wave signal conditioning circuit and a D type power amplifier circuit, a DDS numerical frequency compounding technology is adopted to generate a sine wave signal with a needed frequency, and the sine wave signal is sent to a sine wave signal conditioning circuit; the sine wave signal conditioning circuit removes a direct current component in the sine wave signal generated by the sine wave generating module, amplifies the amplitude value of the sine wave signal and conducts change to obtain two sets of sine wave signals of which the amplitude value is the same and the phase difference is 180 degrees, then two sets of sine wave signals are transferred to a subsequent first D type power amplifier circuit and second D type power amplifier circuit in sequence to be processed; the D type amplifier circuit is used for amplifying power, processing a signal of each of the two sets of sine wave signals of which the amplitude value is the same and the phase difference is 180 degrees and then transferringthe processed signal to a power source and an inductive load. Through the principle, the sine wave power source can be utilized in the environment in which it is required that the output load of the inductive load is large, and a sine wave power source is continuously connected and disconnected.

Description

technical field [0001] The invention relates to a sine wave power supply, in particular to a sine wave power supply that satisfies the frequent on-off of inductive loads. Background technique [0002] In the prior art, when a large inductive load is required to be frequently turned on and off in the application occasion, due to the existence of the inductive back electromotive force, the sine wave waveform output by the sine wave inverter power supply will be seriously distorted at the moment of turning off and on, making the conventional The sine wave inverter power supply cannot be used in this kind of environment. The output of the square wave inverter power supply contains a large number of high-order harmonics, which will generate additional losses in load appliances with iron core inductors or transformers, which will cause interference and damage to the equipment. However, high-end precision inductive equipment requires an inverter power supply with a sine wave power...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/48H02M1/12
CPCH02M1/126H02M1/4258H02M7/48Y02B70/10
Inventor 吴航李正丽李妍妍张强郭丽许永衡
Owner MIANYANG WEIBO ELECTRONICS
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