CN104378060A - Frequency modulation shunt control device - Google Patents

Abstract

A frequency modulation shunt control device, including a shunt power circuit, a bus feedback circuit, a frequency modulation circuit and a drive circuit, the shunt power circuit implements power supply to satellite loads and shunt excess energy, and the bus feedback circuit realizes sampling of bus voltage to generate bus voltage Sampling the voltage, outputting the bus sampling voltage to the frequency modulation circuit. The frequency modulation circuit receives the bus sampling voltage and compares it with the reference voltage to generate a shunt driving PFM signal, which is output to the driving circuit. The drive circuit amplifies the PWM signal of the frequency modulation circuit to generate a first switch signal and a second switch signal to control the shunt power circuit. The shunt control circuit of the present invention is simple, efficient, stable and reliable in operation, adopts frequency modulation PFM control, and ensures the dynamic performance of the bus.

Description

A frequency modulation shunt control device

the

technical field

The invention relates to a frequency modulation and shunt control device, in particular to a satellite solar cell array frequency modulation and shunt control method.

Background technique

Switch shunt control technology is an important technology for busbar regulation in spacecraft power systems today. This technology continues to mature and progress. At present, more and more spacecraft use switch shunt control technology.

So far, the domestically launched spacecraft have all adopted the PWM width modulation shunt control technology. However, the PWM width modulation shunt control technology has the disadvantages of fixed frequency, high frequency, and high switching loss.

the

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a frequency modulation shunt control device, which has the advantages of novel circuit, simplicity, reliability, high efficiency and stable operation.

In order to achieve the above-mentioned purpose, the present invention provides a frequency modulation shunt control device, including a shunt power circuit, a bus feedback circuit, a frequency modulation circuit and a drive circuit; the shunt power circuit realizes power supply to satellite loads and shunting of excess energy; the bus feedback circuit Realize the sampling of the bus voltage, generate the bus sampling voltage, and output the bus sampling voltage to the frequency modulation circuit; the frequency modulation circuit receives the bus sampling voltage, and compares it with the reference voltage to generate a shunt driving PFM signal, which is output to the driving circuit; the driving circuit amplifies the frequency The PWM signal of the modulation circuit generates a first switch signal and a second switch signal, the first switch signal controls the shunt power circuit to shunt the solar array current, and the second switch signal controls the shunt power circuit not to shunt the solar array current.

The beneficial effect of the invention is that the frequency modulation shunt control has low frequency and small switching tube loss, and the shunt control circuit is simple, efficient, stable and reliable, and the dynamic performance of the bus is guaranteed.

Description of drawings

Fig. 1 is a structural block diagram of a frequency modulation shunt control device of the present invention.

the

Detailed ways

In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

The present invention provides a frequency-modulation shunt control device, which adopts frequency-modulation PFM control.

As shown in Figure 1, the frequency modulation shunt control device is realized based on a control circuit, the control circuit includes a bus feedback circuit 2 connected to the shunt power circuit 1, a frequency modulation circuit 3 connected to the bus feedback circuit 2, and a frequency modulation circuit connected to the frequency modulation circuit 2. The drive circuit 4 of the circuit 3. The shunt power circuit 1 realizes the power supply to the satellite load and the shunt of excess energy; the bus feedback circuit 2 realizes sampling the bus voltage, generates the bus sampling voltage, and outputs the bus sampling voltage to the frequency modulation circuit; the frequency modulation circuit 3 receives the bus sampling voltage , and compared with the reference voltage to generate a shunt drive PFM signal, which is output to the drive circuit; the drive circuit 4 amplifies the PWM signal of the frequency modulation circuit to generate the first switch signal and the second switch signal, and the first switch signal controls the shunt power circuit 1 to the sun The battery array current is shunted, and the second switch signal controls the shunting power circuit 1 not to shunt the solar battery array current. The frequency modulation circuit 3 is composed of a Schmitt comparator, which receives the bus sampling voltage and compares it with the reference voltage to generate a shunt driving PFM signal

Only the above is only a preferred embodiment of the present invention, and should not limit the implementation scope of the present invention, so the change of numerical values or the replacement of equivalent components, or the equivalent changes made according to the patent scope of the present invention and modifications should still belong to the category covered by the patent of the present invention.

Claims (2)

1. a frequency modulation flow division control device, is characterized in that: comprise shunting power circuit, bus feedback circuit, frequency modulation circuit and drive circuit;

The power supply of shunting power circuit realiration to satellite load and the shunting of excess energy;

Bus feedback circuit realizes sampling to busbar voltage, produces bus sampled voltage, bus sampled voltage is outputted to frequency modulation circuit;

Frequency modulation circuit accepts bus sampled voltage, and compares with reference voltage to produce to shunt and drive PFM signal, outputs to drive circuit;

The pwm signal of drive circuit amplification frequency modulation circuit, produce the first switching signal and second switch signal, first switching signal controls shunting power circuit and shunts solar battery array electric current, and second switch signal controlling shunting power circuit is not shunted solar battery array electric current.

2. a kind of frequency modulation flow division control device as claimed in claim 1, it is characterized in that, described frequency modulation circuit is made up of Schmidt's comparator, accepts bus sampled voltage, and compares with reference voltage to produce to shunt and drive PFM signal.