Novel gyroscope power supply

Abstract

The invention discloses a novel gyro power supply, which comprises a rectification filter circuit, an inverter circuit, a filter isolation circuit and a feedback circuit, the rectifying and filtering circuit rectifies and filters power grid voltage to form direct current and transmits the direct current to the inverter circuit; the inverter circuit inverts input direct current into alternating current and then transmits the alternating current to the filter isolation circuit; the filtering and isolating circuit is used for filtering and isolating the alternating current output by the inverter circuit and then outputting the alternating current to a load for use; the feedback circuit obtains current and voltage data output by the filtering isolation circuit and sends a control signal to the inverter circuit according to the obtained voltage and current data. The gyro power supply has the advantages of being small in size, light in weight, low in noise, high in conversion efficiency, reliable in work, convenient to use and the like, is an ideal new substitute product for an intermediate frequency unit, and is an excellent scheme for improving the gyro power supply.

Description

Technical Field

[0001] The invention relates to the technical field of ship equipment, and in particular to a novel gyro power supply. Background Art

[0002] A gyro power supply is a device that provides stable power to a gyroscope, which is an inertial sensing device used to measure and control the angular motion of an object in relative inertial space. The stability and accuracy of the gyro power supply has a direct impact on the performance of the gyroscope.

[0003] The 400Hz three-phase gyro power supplies currently used are mostly medium frequency units, which are large in size, high in noise, low in efficiency, and inconvenient to manage. At the same time, due to their early design time, backward control methods, and square wave output, most of the electronic components in the control circuit are relatively backward and separated, and reliability and quality are difficult to guarantee. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a new gyro power supply with small size, light weight, low noise, high conversion efficiency, reliable operation and easy use.

[0005] A novel gyro power supply includes a rectifier filter circuit, an inverter circuit, a filter isolation circuit and a feedback circuit; The input end of the rectifier and filter circuit is connected to the power grid, the output end of the rectifier and filter circuit is connected to the input end of the inverter circuit, and the rectifier and filter circuit rectifies and filters the power grid voltage to form direct current and transmits it to the inverter circuit; The output end of the inverter circuit is connected to the filter isolation circuit, and the inverter circuit inverts the input direct current into alternating current and then transmits it to the filter isolation circuit; The filtering and isolating circuit is used to filter and isolate the AC power output by the inverter circuit and then output it to the load for use; The input end of the feedback circuit is connected to the output end of the filtering isolation circuit, and the input end of the feedback circuit is connected to the input end of the inverter circuit. The feedback circuit obtains the current and voltage data output by the filtering isolation circuit, and sends a control signal to the inverter circuit according to the obtained voltage and current data.

[0006] Preferably, the feedback circuit includes a first voltage and current output sampling circuit, a main control circuit and a drive isolation circuit, the output end of the first voltage and current output sampling circuit is connected to the output end of the filter isolation circuit, the output end of the first voltage and current output sampling circuit is connected to the main control circuit, the first voltage and current output sampling circuit is used to collect the output voltage and current of the filter isolation circuit and send it to the main control circuit, the output end of the main control circuit is connected to the input end of the drive isolation circuit, the output end of the drive isolation circuit is connected to the input end of the inverter circuit, the main control circuit sends a corresponding control signal to the drive isolation circuit according to the voltage and current information sent by the first voltage and current output sampling circuit, and the drive isolation circuit controls the inverter circuit according to the control signal of the main control circuit.

[0007] Preferably, the feedback circuit also includes a second voltage and current output sampling circuit and an adjustment coefficient calculation circuit, the input end of the second voltage and current output sampling circuit is connected to the output end of the inverter circuit, the output end of the second voltage and current output sampling circuit is connected to the input end of the adjustment coefficient calculation circuit, the second voltage and current output sampling circuit collects voltage and current data output by the inverter circuit and sends them to the adjustment coefficient calculation circuit, the output end of the first voltage and current output sampling circuit is also connected to the input end of the adjustment coefficient calculation circuit, the output end of the adjustment coefficient calculation circuit is connected to the input end of the main control circuit, the adjustment coefficient calculation circuit calculates the adjustment coefficient according to the voltage and current data of the filter isolation circuit collected by the first voltage and current output sampling circuit and the voltage circuit data of the inverter circuit collected by the second voltage and current output sampling circuit, and sends the calculated adjustment coefficient to the main control circuit, the main control circuit corrects the voltage and current data of the filter isolation circuit collected by the first voltage and current output sampling circuit according to the adjustment coefficient, and sends a control signal to the drive isolation circuit according to the corrected data.

[0008] Preferably, it also includes an alarm circuit, the input end of the alarm circuit is connected to the output end of the main control circuit, the alarm circuit is used to obtain alarm data information from the main control circuit, and send out an alarm signal when the obtained alarm data information exceeds a set value.

[0009] Preferably, the rectification and filtering circuit includes an EMI filter LB1, a rectifier bridge module D5, a filter capacitor C9, a filter inductor L3 and a relay JDQ1, the input end of the EMI filter LB1 is connected to the power grid, the output end of the EMIC filter LB1 is connected to the input end of the rectifier bridge module D5, the EMI filter LB1 is used to filter the AC power of the power grid and transmit it to the rectifier bridge module D5, the output end of the rectifier bridge module D5 is connected to the filter capacitor C9 and the filter inductor L3, the rectifier bridge module D5 rectifies the filtered AC power and outputs it to the filter capacitor C9 and the filter inductor L3, the filter capacitor C9 and the filter inductor L3 filter the rectified voltage and output it to the inverter circuit, the relay JDQ1 is connected to the inverter circuit, and is used to turn on the power when the system starts and cut off the power when a fault occurs.

[0010] Preferably, the inverter circuit includes an IGBT-IPM inverter module U5, a capacitor C21 and a capacitor C22. The IGBT-IPM inverter module U5 is connected to the output end of the rectifier and filter circuit, and is used to invert the rectified voltage into a high-frequency pulse wave whose pulse width changes according to a sinusoidal wave law. The capacitor C21 and the capacitor C22 are used to suppress the peak pulse voltage Ldi / dt caused by the presence of inductance during the on and off process of the IGBT-IPM inverter module U5.

[0011] Preferably, the filtering and isolation circuit includes an output filtering module and an output isolation module, the output filtering module includes an inductor L7, an inductor L8, an inductor L9, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16 and a capacitor C17, the inductor L7, the inductor L8 and the inductor L9 are respectively connected to the three-phase output ends of the inverter circuit in a one-to-one correspondence, the capacitor C12 and the capacitor C13 are connected in parallel and then connected to the inductor L7, the capacitor C14 and the capacitor C15 are connected in parallel and then connected to the inductor L8, the capacitor C14 and the capacitor C15 are connected in parallel and then connected to the inductor L9, the output filtering module is used to restore the high-frequency pulse wave with a pulse width changing according to the sinusoidal wave law output by the inverter circuit into an intermediate frequency sinusoidal wave and then output it to the output isolation module, the output isolation module is a three-phase transformer, and the three-phase transformer isolates and transforms the intermediate frequency sinusoidal wave and then outputs it to the load for use.

[0012] Preferably, the main control circuit includes a single-chip microcomputer, which generates an SPWM pulse signal with a carrier frequency of 16.8kHz, which is output from a pulse width modulation signal output port and added to the gate of the IGBT in the inverter circuit through the drive isolation circuit to control the inverter circuit to work correctly, and adjusts the pulse width of the SPWM pulse signal according to the feedback value of the voltage and current output by the filter isolation circuit to maintain the stability of the output voltage and current amplitude.

[0013] Compared with the prior art, the gyro power supply of the present invention has the advantages of small size, light weight, low noise, high conversion efficiency, reliable operation, and easy use. It is an ideal new product to replace the medium frequency unit and an excellent solution for improving the gyro power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a system block diagram of the novel gyro power supply of the present invention; Figure 2 It is a partial circuit diagram of the rectifier and filter circuit in the novel gyro power supply of the present invention; Figure 3 It is a partial circuit diagram of the inverter circuit in the novel gyro power supply of the present invention; Figure 4 It is a partial circuit diagram of the filtering isolation circuit in the novel gyro power supply of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meaning understood by people with general skills in the field to which the present invention belongs.

[0016] The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "a", "an" or "the" and other similar words do not indicate a quantitative limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" cover the features, wholes, steps, operations, elements and / or components listed after "include" or "comprise", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0017] As attached Figure 1 As shown, a novel gyro power supply includes a rectifier filter circuit, an inverter circuit, a filter isolation circuit, a feedback circuit and an alarm circuit; The input end of the rectifier and filter circuit is connected to the power grid, and the output end of the rectifier and filter circuit is connected to the input end of the inverter circuit. The rectifier and filter circuit rectifies and filters the power grid voltage to form direct current and transmits it to the inverter circuit.

[0018] The output end of the inverter circuit is connected to the filter isolation circuit. The inverter circuit inverts the input direct current into alternating current and then transmits it to the filter isolation circuit.

[0019] The filter isolation circuit is used to filter and isolate the AC power output by the inverter circuit and then output it to the load for use.

[0020] The input end of the feedback circuit is connected to the output end of the filter isolation circuit, and the input end of the feedback circuit is connected to the input end of the inverter circuit. The feedback circuit obtains the current and voltage data output by the filter isolation circuit, and sends a control signal to the inverter circuit according to the obtained voltage and current data. Specifically, the feedback circuit includes a first voltage and current output sampling circuit, a main control circuit, and a drive isolation circuit. The output end of the first voltage and current output sampling circuit is connected to the output end of the filter isolation circuit, and the output end of the first voltage and current output sampling circuit is connected to the main control circuit. The first voltage and current output sampling circuit is used to collect the output voltage and current of the filter isolation circuit and send it to the main control circuit. The output end of the main control circuit is connected to the input end of the drive isolation circuit, and the output end of the drive isolation circuit is connected to the input end of the inverter circuit. The main control circuit sends a corresponding control signal to the drive isolation circuit according to the voltage and current information sent by the first voltage and current output sampling circuit, and the drive isolation circuit controls the inverter circuit according to the control signal of the main control circuit.

[0021] In this specific embodiment, the feedback circuit also includes a second voltage and current output sampling circuit and an adjustment coefficient calculation circuit. The input end of the second voltage and current output sampling circuit is connected to the output end of the inverter circuit, and the output end of the second voltage and current output sampling circuit is connected to the input end of the adjustment coefficient calculation circuit. The second voltage and current output sampling circuit collects voltage and current data output by the inverter circuit and sends it to the adjustment coefficient calculation circuit. The output end of the first voltage and current output sampling circuit is also connected to the input end of the adjustment coefficient calculation circuit. The output end of the adjustment coefficient calculation circuit is connected to the input end of the main control circuit. The adjustment coefficient calculation circuit calculates the adjustment coefficient based on the voltage and current data of the filter isolation circuit collected by the first voltage and current output sampling circuit and the voltage circuit data of the inverter circuit collected by the second voltage and current output sampling circuit, and sends the calculated adjustment coefficient to the main control circuit. The main control circuit corrects the voltage and current data of the filter isolation circuit collected by the first voltage and current output sampling circuit according to the adjustment coefficient, and sends a control signal to the drive isolation circuit according to the corrected data. By setting up a second voltage and current output sampling circuit and an adjustment coefficient calculation circuit, since the first voltage and current output sampling circuit collects the voltage and current and outputs them to the main control circuit, there is a certain delay when the main control circuit controls the inverter circuit through the driving isolation circuit, resulting in reduced control accuracy. Therefore, this scheme collects the voltage and current output by the inverter circuit at this time through the second voltage and current output sampling circuit, and then calculates the adjustment coefficient to the main control circuit, and uses the adjustment coefficient to compensate for the delay, thereby effectively improving the control accuracy of the inverter circuit.

[0022] In this specific embodiment, the input end of the alarm circuit is connected to the output end of the main control circuit. The alarm circuit is used to obtain alarm data information from the main control circuit and send an alarm signal when the alarm data information obtained exceeds the set value. The alarm circuit can select sound alarm, light alarm or sound and light alarm, and the source of the alarm signal can be realized by hardware sampling and software processing. In order to ensure the safe and reliable operation of the system and give full play to the powerful control function of the single-chip microcomputer, the main control circuit inputs the key components and key parameters of the system into the single-chip microcomputer for processing, such as overvoltage, undervoltage, overcurrent, overload, output short circuit, overheating, etc., to realize self-diagnosis of the system working state and corresponding alarm for faults. Since the single-chip microcomputer is added to this scheme, in order to make full use of the resources of the single-chip microcomputer, there is a feedback circuit at the same time, plus the design of the overall circuit, it can detect the set point through software without adding any hardware, and can reflect the alarm signal at any time.

[0023] As attached Figure 2As shown, in this specific embodiment, the rectifier and filter circuit includes an EMI filter LB1, a rectifier bridge module D5, a filter capacitor C9, a filter inductor L3 and a relay JDQ1. The input end of the EMI filter LB1 is connected to the power grid, and the output end of the EMIC filter LB1 is connected to the input end of the rectifier bridge module D5. The EMI filter LB1 is used to filter the AC power of the power grid and transmit it to the rectifier bridge module D5. The output end of the rectifier bridge module D5 is connected to the filter capacitor C9 and the filter inductor L3. The rectifier bridge module D5 rectifies the filtered AC power and outputs it to the filter capacitor C9 and the filter inductor L3. The filter capacitor C9 and the filter inductor L3 filter the rectified voltage and output it to the inverter circuit to ensure that the voltage provided to the inverter circuit is a flat DC voltage. The relay JDQ1 is connected to the inverter circuit and is used to turn on the power when the system starts and cut off the power when a fault occurs.

[0024] As attached Figure 3 As shown, in this specific embodiment, the inverter circuit includes an IGBT-IPM inverter module U5, a capacitor C21 and a capacitor C22. The IGBT-IPM inverter module U5 is connected to the output end of the rectifier and filter circuit, and is used to invert the rectified voltage into a high-frequency pulse wave whose pulse width changes according to the sinusoidal law. The capacitor C21 and the capacitor C22 are used to suppress the peak pulse voltage Ldi / dt caused by the presence of inductance during the on-off process of the IGBT-IPM inverter module U5, so as to ensure that the main power switching device IGBT-IPM is not damaged by breakdown due to excessive peak pulse voltage.

[0025] As attached Figure 4 As shown, in this specific embodiment, the filtering and isolation circuit includes an output filtering module and an output isolation module. The output filtering module includes an inductor L7, an inductor L8, an inductor L9, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16 and a capacitor C17. The inductor L7, the inductor L8 and the inductor L9 are respectively connected to the three-phase output ends of the inverter circuit in a one-to-one correspondence. The capacitor C12 and the capacitor C13 are connected in parallel and then connected to the inductor L7. The capacitor C14 and the capacitor C15 are connected in parallel and then connected to the inductor L8. The capacitor C14 and the capacitor C15 are connected in parallel and then connected to the inductor L9. The output filtering module is used to restore the high-frequency pulse wave with a pulse width changing according to the sinusoidal wave law output by the inverter circuit to an intermediate frequency sinusoidal wave and then output it to the output isolation module. The output isolation module is a three-phase transformer. The three-phase transformer isolates and transforms the intermediate frequency sinusoidal wave and then outputs it to the load for use.

[0026] In this embodiment, the main control circuit is mainly used to generate 6 SPWM waves according to the change of the grid voltage. You can choose a special SPWM device (such as SA4828, etc.) and add a single-chip microcomputer to process the feedback part. You can also choose a DSP chip and a special SPWM wave generating device to combine to generate a waveform that meets the technical requirements.

[0027] The SPWM (Sinusoidal PWM) method is a relatively mature and widely used PWM method. An important conclusion in sampling control theory is that when narrow pulses with equal impulses but different shapes are added to a link with inertia, the effect is basically the same. The SPWM method is based on this conclusion. It uses a PWM waveform, which is equivalent to a sine wave and changes in pulse width according to the sine law, to control the on and off of the switching devices in the inverter circuit, so that the area of ​​the pulse voltage output is equal to the area of ​​the desired sine wave in the corresponding interval. By changing the frequency and amplitude of the modulation wave, the frequency and amplitude of the output voltage of the inverter circuit can be adjusted. There are many schemes for implementing this method. In this specific embodiment, the hardware modulation method is used to generate the SPWM wave.

[0028] In this specific embodiment, the MSP430 series single-chip microcomputer is selected to realize the waveform required by the technology. Its advantage is that it integrates SPWM and feedback signals, can calculate and output waveforms at any time, and is inexpensive. It is difficult to achieve closed-loop real-time control by using a special SPWM chip and a single-chip microcomputer or DSP chip interface, and the volume is large. Therefore, the main control circuit of this scheme includes a single-chip microcomputer, which uses TI's 16-bit single-chip microcomputer as the control core. The single-chip microcomputer is mainly used for control and data processing, and has a pulse width modulation signal output port. The fuzzy control algorithm is used in the control algorithm. The single-chip microcomputer generates an SPWM pulse signal with a carrier frequency of 16.8kHz, which is output from the pulse width modulation signal output port and added to the gate of the IGBT in the inverter circuit through the drive isolation circuit to control the inverter circuit to work correctly, and adjust the pulse width of the SPWM pulse signal according to the feedback value of the voltage and current output by the filter isolation circuit to maintain the stability of the output voltage and current amplitude. Since a 16-bit single-chip microcomputer is used as the control core of the system, the control is fast and accurate, so that the system has the characteristics of fast response, stable operation and reliability.

[0029] The gate drive voltage of IGBT in the inverter circuit can be provided by different drive isolation circuits. When selecting the drive isolation circuit, the power supply requirements of the drive isolation circuit, the requirements of the device off bias, the requirements of the gate charge, the requirements of the resistance, the protection function and other factors should be considered. The performance of the drive isolation circuit is not only directly related to the working performance and operation safety of the IGBT device itself, but also affects the performance and safety of the entire system.

[0030] The 6MBP060RH20A IGBT power module produced by Fuji Corporation of Japan has unique features in chip manufacturing process, internal layout, substrate selection, etc. It does not need to use RCD absorption circuit, the SOA (safe operating area) curve is rectangular, it does not need negative voltage shutdown, it can automatically equalize current when connected in parallel, the current is automatically suppressed when short-circuited, the switching loss does not increase proportionally with temperature, and it has a positive temperature characteristic curve. In view of this, the IGBT produced by Fuji Corporation of Japan is selected as the main power switch device of the inverter circuit. In order to make full use of the excellent performance of IGBT and ensure that the system can work safely and reliably, the drive isolation circuit is also applied according to its recommended circuit. This series of drivers requires four isolated +15V power supplies; has high dv / dt capacity; perfect protection function; fault memory, and informs the control system through the ALARM signal; the upper and lower arms are interlocked by program control to avoid the simultaneous opening of two IGBTs in the same bridge arm; the program is adjustable online, so that when using IGBTs of different power capacities, they can work at a higher switching frequency and obtain high conversion efficiency.

[0031] As a voltage-controlled IGBT, it does not require gate drive current, but because there is a large capacitor at the gate input, a very narrow pulse gate drive current is formed during driving. The larger the IGBT capacity, the larger the peak value of the pulse current. For example, the pulse peak value of the turn-on current of a 200A / 1200V IGBT is about 1.5A. Fuji intelligent module integrates the drivers of each arm. It only needs to provide the working voltage of each arm, and the signals of each arm can be added to the module. The intelligent module can withstand high peak gate current without reducing VGE. In order to increase the turn-on and turn-off speed and reduce the driver loss, the output stage of the intelligent module driver uses MOSFET pairs to reduce the resistance on the connection line. Another important factor affecting the switching speed is the gate resistance RG. Reducing RG can reduce the switching loss of the IGBT, but due to the presence of stray inductance, the peak voltage between the collector and emitter when the IGBT is turned off increases. The intelligent module divides RG into RGON and RGOFF according to the signal, so that the two parameters can be controlled separately, and according to the different IGBT capacities, the intelligent module can automatically adjust RGON and RGOFF to obtain the best driving effect.

[0032] Overcurrent protection is one of the important functions of the drive isolation circuit. The intelligent module uses the monitoring of the IGBT collector-emitter voltage VCE to measure and control overcurrent. The VCE measurement and control circuit monitors the gate input signal and the collector-emitter voltage at the same time. When the input signal is high potential and after 3 to 5μs, VCE is higher than the normal saturation value (3.5 to 5.5V), it is considered to be overcurrent, the pulse signal is turned off, and a fault alarm signal (ALARM) is given. This is a more advanced overcurrent measurement and control method.

[0033] The working principle of the gyro power supply of this scheme can be summarized as follows: the single-phase AC mains is filtered by the EMI filter LB1, rectified by the rectifier bridge module D5, filtered by the filter capacitor C9 and the filter inductor L3, and added to the intelligent inverter circuit composed of the IGBT-IPM inverter module. The DC high voltage is inverted into a high-frequency pulse wave with a pulse width that changes according to the sinusoidal law by the inverter circuit, and then the high-frequency harmonics are filtered out by the output filter module to obtain a medium-frequency sine wave. Finally, it is isolated and transformed (boosted or stepped down) by the three-phase transformer of the output isolation module and provided to the load. The SPWM pulse wave is generated by the main control circuit and the width of the pulse wave is changed according to the feedback voltage and feedback current output by the filter isolation circuit, thereby ensuring the stability of the output voltage.

[0034] Compared with the prior art, the gyro power supply of the present invention has the advantages of small size, light weight, low noise, high conversion efficiency, reliable operation, easy use, etc. It is an ideal new product to replace the medium frequency unit and an excellent solution for the improvement of the gyro power supply. The IGBT used in the present invention is a new generation of composite power electronic devices, its control stage is an insulated gate controlled field effect transistor, and its output stage is a bipolar power transistor, so it has the advantages of both and overcomes the disadvantages of both, such as high input impedance; high switching frequency; very small driving power; small on-state voltage drop; large current density, etc.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A new type of gyro power supply, characterized in that: It includes a rectifier filter circuit, an inverter circuit, a filter isolation circuit and a feedback circuit; The input end of the rectifier and filter circuit is connected to the power grid, the output end of the rectifier and filter circuit is connected to the input end of the inverter circuit, and the rectifier and filter circuit rectifies and filters the power grid voltage to form direct current and transmits it to the inverter circuit; The output end of the inverter circuit is connected to the filter isolation circuit, and the inverter circuit inverts the input direct current into alternating current and then transmits it to the filter isolation circuit; The filtering and isolating circuit is used to filter and isolate the AC power output by the inverter circuit and then output it to the load for use; The input end of the feedback circuit is connected to the output end of the filtering isolation circuit, and the input end of the feedback circuit is connected to the input end of the inverter circuit. The feedback circuit obtains the current and voltage data output by the filtering isolation circuit, and sends a control signal to the inverter circuit according to the obtained voltage and current data.

2. The novel gyro power supply according to claim 1 is characterized in that: The feedback circuit includes a first voltage and current output sampling circuit, a main control circuit and a drive isolation circuit. The output end of the first voltage and current output sampling circuit is connected to the output end of the filter isolation circuit, and the output end of the first voltage and current output sampling circuit is connected to the main control circuit. The first voltage and current output sampling circuit is used to collect the output voltage and current of the filter isolation circuit and send it to the main control circuit. The output end of the main control circuit is connected to the input end of the drive isolation circuit, and the output end of the drive isolation circuit is connected to the input end of the inverter circuit. The main control circuit sends a corresponding control signal to the drive isolation circuit according to the voltage and current information sent by the first voltage and current output sampling circuit, and the drive isolation circuit controls the inverter circuit according to the control signal of the main control circuit.

3. The novel gyro power supply according to claim 2 is characterized in that: The feedback circuit also includes a second voltage and current output sampling circuit and an adjustment coefficient calculation circuit. The input end of the second voltage and current output sampling circuit is connected to the output end of the inverter circuit, and the output end of the second voltage and current output sampling circuit is connected to the input end of the adjustment coefficient calculation circuit. The second voltage and current output sampling circuit collects voltage and current data output by the inverter circuit and sends them to the adjustment coefficient calculation circuit. The output end of the first voltage and current output sampling circuit is also connected to the input end of the adjustment coefficient calculation circuit. The output end of the adjustment coefficient calculation circuit is connected to the input end of the main control circuit. The adjustment coefficient calculation circuit calculates the adjustment coefficient according to the voltage and current data of the filter isolation circuit collected by the first voltage and current output sampling circuit and the voltage circuit data of the inverter circuit collected by the second voltage and current output sampling circuit, and sends the calculated adjustment coefficient to the main control circuit. The main control circuit corrects the voltage and current data of the filter isolation circuit collected by the first voltage and current output sampling circuit according to the adjustment coefficient, and sends a control signal to the drive isolation circuit according to the corrected data.

4. The novel gyro power supply according to claim 3 is characterized in that: It also includes an alarm circuit, the input end of which is connected to the output end of the main control circuit. The alarm circuit is used to obtain alarm data information from the main control circuit and send out an alarm signal when the obtained alarm data information exceeds a set value.

5. The novel gyro power supply according to claim 4 is characterized in that: The rectification and filtering circuit includes an EMI filter LB1, a rectifier bridge module D5, a filter capacitor C9, a filter inductor L3 and a relay JDQ1. The input end of the EMI filter LB1 is connected to the power grid, and the output end of the EMIC filter LB1 is connected to the input end of the rectifier bridge module D5. The EMI filter LB1 is used to filter the mains power of the power grid and transmit it to the rectifier bridge module D5. The output end of the rectifier bridge module D5 is connected to the filter capacitor C9 and the filter inductor L3. The rectifier bridge module D5 rectifies the filtered mains power and outputs it to the filter capacitor C9 and the filter inductor L3. The filter capacitor C9 and the filter inductor L3 filter the rectified voltage and output it to the inverter circuit. The relay JDQ1 is connected to the inverter circuit and is used to turn on the power when the system starts and cut off the power when a fault occurs.

6. The novel gyro power supply according to claim 5, characterized in that: The inverter circuit includes an IGBT-IPM inverter module U5, a capacitor C21 and a capacitor C22. The IGBT-IPM inverter module U5 is connected to the output end of the rectifier and filter circuit, and is used to invert the rectified voltage into a high-frequency pulse wave whose pulse width changes according to the sinusoidal law. The capacitor C21 and the capacitor C22 are used to suppress the peak pulse voltage Ldi / dt caused by the presence of inductance during the on and off process of the IGBT-IPM inverter module U5.

7. The novel gyro power supply according to claim 6 is characterized in that: The filtering isolation circuit includes an output filtering module and an output isolation module. The output filtering module includes an inductor L7, an inductor L8, an inductor L9, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16 and a capacitor C17. The inductor L7, the inductor L8 and the inductor L9 are respectively connected to the three-phase output terminals of the inverter circuit in a one-to-one correspondence. The capacitor C12 and the capacitor C13 are connected in parallel and then connected to the inductor L7. The capacitor C14 and the capacitor C15 are connected in parallel and then connected to the inductor L8. The capacitor C14 and the capacitor C15 are connected in parallel and then connected to the inductor L9. The output filtering module is used to restore the high-frequency pulse wave with a pulse width changing according to the sine wave law output by the inverter circuit to an intermediate frequency sine wave and then output it to the output isolation module. The output isolation module is a three-phase transformer. The three-phase transformer isolates and transforms the intermediate frequency sine wave and then outputs it to the load for use.

8. The novel gyro power supply according to claim 7 is characterized in that: The main control circuit includes a single-chip microcomputer, which generates an SPWM pulse signal with a carrier frequency of 16.8kHz, which is output from a pulse width modulation signal output port and added to the gate of the IGBT in the inverter circuit through the drive isolation circuit to control the inverter circuit to work correctly, and adjusts the pulse width of the SPWM pulse signal according to the feedback value of the voltage and current output by the filter isolation circuit to maintain the stability of the output voltage and current amplitude.

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