CN115765501A - Compatible high-power demagnetization power supply - Google Patents
Compatible high-power demagnetization power supply Download PDFInfo
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- CN115765501A CN115765501A CN202211705853.6A CN202211705853A CN115765501A CN 115765501 A CN115765501 A CN 115765501A CN 202211705853 A CN202211705853 A CN 202211705853A CN 115765501 A CN115765501 A CN 115765501A
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Abstract
The utility model relates to a compatible high-power demagnetization power supply, including main alternating current power supply and first rectifier module, main alternating current power supply's output with the power input end of first rectifier module is connected, still includes core control module, vary voltage component, miniwatt rectifier module and current sampling module, main alternating current power supply's output with the power input end of vary voltage component is connected, the power output of vary voltage component with the power input end of miniwatt rectifier module is connected, the controlled end of miniwatt rectifier module with the pulse signal end of core control module is connected, the power output of miniwatt rectifier module with the current signal input end of current sampling module is connected, when meetting the load of miniwatt or bearing power less load, can more accurately export the miniwatt power supply steadily to can eliminate the magnetism that the naval vessel carried better, avoided the magnetic sensing utensil to receive the influence, the naval vessel operation is more stable.
Description
[ technical field ] A
The application relates to the technical field of naval vessel equipment, in particular to a compatible high-power demagnetizing power supply.
[ background ] A method for producing a semiconductor device
The vessel made of steel can gradually accumulate magnetism under the action of internal and external forces such as earth magnetic force, machine operation and the like, which is a fatal threat to the vessel of a longitudinal ocean and a transverse ocean, so the vessel degaussing technology is a commonly used technology for preventing damage of medium weapons, the degaussing operation is to remove a magnetic field remained on a metal shell of the vessel so as to avoid being monitored by other submarines and surface vessels in the operation process, and degaussing can also prevent army from being attacked by a magnetic fuse-induced mine.
[ summary of the invention ]
In order to avoid the influence on a magnetic sensitive tool caused by overlarge sampling deviation during small current output when a small magnetic load or a load with smaller bearing power is met during the demagnetization operation of a high-power demagnetization power supply. According to the invention, a branch is led out from the alternating current power supply, voltage reduction is carried out through the voltage transformation element, and then the low-power rectification module is arranged for rectification, so that the low-power supply with higher precision and stronger stability is output.
The invention provides the following scheme:
the utility model provides a compatible high-power demagnetization power supply, includes main alternating current power supply and first rectifier module, main alternating current power supply's output with first rectifier module's power input end is connected, still includes core control module, vary voltage component, miniwatt rectifier module and current sampling module, main alternating current power supply's output with vary voltage component's power input end is connected, vary voltage component's power output end with miniwatt rectifier module's power input end is connected, miniwatt rectifier module's controlled end with core control module's pulse signal end is connected, miniwatt rectifier module's power output end with current sampling module's current signal input end is connected.
The high-power degaussing power supply comprises a first common-cathode switch tube group, a first common-anode switch tube group, a second common-cathode switch tube group and a second common-anode switch tube group, wherein each anode end of the first common-cathode switch tube group is connected with each cathode end of the first common-anode switch tube in a one-to-one correspondence manner, each anode end of the second common-cathode switch tube group is connected with each cathode end of the second common-anode switch tube group in a one-to-one correspondence manner, the common anode end of the first common-anode switch tube group and the common anode end of the second common-anode switch tube group are connected in parallel and are the cathode end of the low-power rectification module, the common cathode end of the first common-cathode switch tube group is the first anode end of the low-power rectification module, and the common cathode end of the second common-cathode switch tube group is the second anode end of the low-power rectification module.
As above-mentioned high-power demagnetization power supply, be connected with protection module between main alternating current power supply and the vary voltage component, protection module includes air switch QF1 and ac contactor KM5, air switch QF 1's three input respectively with main alternating current power supply's three-phase wire connection, air switch QF 1's three output is connected with the three input of ac contactor KM 5's main contact respectively, three output of ac contactor KM 5's main contact respectively with it has connect fuse F17, fuse F18 and fuse F19 to vary voltage component between the primary winding three-phase input end, it has connect voltage transformer CT5 to connect between fuse F17 and the primary winding of vary voltage component, it has connected voltage transformer CT6 to connect between fuse F19 and the primary winding of vary voltage component.
The high-power degaussing power supply further comprises a direct-current power supply, a current transformer is connected between the low-power rectifying module and the direct-current power supply, the signal output end of the current transformer is connected with the signal input end of the current sampling module, and the signal output end of the current sampling module is connected with the current sampling end of the core control module.
The high-power degaussing power supply comprises a current sampling module, a resistor R2, a resistor R66, a first operational amplifier chip U2 and a second operational amplifier chip U7, wherein a first end of the resistor R2 is a signal input end of the current sampling module, a resistor R6 is connected between a second end of the resistor R2 and a first non-inverting end of the first operational amplifier chip U2, the resistor R7 is connected between the first non-inverting end of the first operational amplifier chip U2 and the ground, a capacitor C1 is connected between the first non-inverting end of the first operational amplifier chip U2 and the ground, a resistor R35 is connected between a first inverting end and a first output end of the first operational amplifier chip U2, a resistor R10 is connected between a second non-inverting end of the first operational amplifier chip U2 and the ground, and a resistor R39 is connected between a second inverting end and a second output end of the first operational amplifier chip U2, it has resistance R56 to connect between the homophase end of chip U7 is put to first output and the second fortune of chip U2 to first fortune, it has resistance R59 to connect between the second output of chip U2 and the inverting terminal of second fortune chip U7 are put to first fortune, it has resistance R62 to connect between the inverting terminal of chip U7 and the output to put to second fortune, it has resistance R51 to connect between resistance R56 and the ground, resistance R56 with resistance R51's common terminal with chip U7 is put to the second fortune is connected, chip U7's output and the first end of resistance R66 are put to the second fortune, resistance R66's second end is current sampling module's signal output part, more than one electric capacity has been connect between current sampling module's signal output part and the ground.
In the high power degaussing power supply, the transformer element is provided with a thermal relay for preventing the transformer from overheating.
The high-power degaussing power supply comprises a first common-cathode switch tube group and a second common-anode switch tube group, wherein each anode end of the first common-cathode switch tube group is connected with each cathode end of the first common-anode switch tube group in a one-to-one correspondence manner, the common anode end of the first common-anode switch tube group is the anode end of the first rectifying module, and the common cathode end of the first common-cathode switch tube group is the cathode end of the first rectifying module.
The high-power degaussing power supply further comprises a standby power supply, and the main alternating current power supply and the standby power supply are both three-phase three-wire 650V alternating current power supplies.
The high-power degaussing power supply further comprises a second rectification module, a power input end of the second rectification module is connected with an output end of the standby power supply, the second rectification module comprises a fourth common cathode switch tube group and a fourth common anode switch tube group, anode ends of the fourth common cathode switch tube group are respectively connected with cathode ends of the fourth common anode switch tube group in a one-to-one correspondence manner, a common cathode end of the fourth common cathode switch tube group is a positive end of the second rectification module, and a common anode end of the fourth common anode switch tube group is a negative end of the second rectification module.
According to the embodiment of the invention, a branch is led out from the alternating current power supply, the voltage transformation element is arranged to reduce the voltage, the rectification processing is carried out by the small-power rectification module, and the controlled end of the rectification module is controlled by the core control module, so that the stable small-power supply can be accurately output when a small-magnetic load or a load with smaller bearing power is met, the magnetism carried by a naval vessel can be better eliminated, a magnetosensitive device is prevented from being influenced, and the naval vessel runs more stably.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below.
Fig. 1 is a connection block diagram of a compatible high power degaussing power supply according to an embodiment of the present invention;
FIG. 2 is a general schematic diagram of a compatible high power degaussing power supply according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a current sampling module of an embodiment of the present invention.
[ detailed description ] embodiments
Referring to fig. 1 to fig. 3, this embodiment provides a compatible high-power degaussing power supply, which includes a main ac power supply 1 and a first rectification module 2, where an output end of the main ac power supply 1 is connected to a power input end of the first rectification module 2, and further includes a core control module, a voltage transformation element 6, a low-power rectification module 5, and a current sampling module, where an output end of the main ac power supply 1 is connected to the power input end of the voltage transformation element 6, a power output end of the voltage transformation element 6 is connected to the power input end of the low-power rectification module 5, a controlled end of the low-power rectification module 5 is connected to a pulse signal end of the core control module, and a power output end of the low-power rectification module 5 is connected to a current signal input end of the current sampling module.
This embodiment sets up voltage transformation component 6 through drawing a branch road on this alternating current power supply and steps down voltage, and rethread small power rectifier module 5 carries out the rectification and handles, and rethread core control module controls rectifier module's controlled terminal, when meetting little magnetic load or bearing the load that power is less, can more accurately export the small power supply steadily to can eliminate the magnetism that the naval vessel carried better, avoid the magnetic sensing utensil to receive the influence, the naval vessel operation is more stable.
The chip in the core control module in this embodiment is a GD 32-series single chip microcomputer, and domestic 32 is a single chip microcomputer, wherein GD32F307xx is adopted, and the chip belongs to a mainstream product of a GD32 single chip microcomputer family. The novel 32-bit general microcontroller is based on an ARMCortex-M4RISC core, and has the best cost performance in the aspects of enhancing the processing capability, reducing the power consumption and peripheral equipment. The Cortex-M4 core function realizes a set of complete DSP instructions to meet the requirement of digital signal control, and can better meet the control and signal processing capabilities of high efficiency and easy use. It also provides a Memory Protection Unit (MPU) and powerful trace techniques to enhance application security and advanced debug support. Its working frequency is 120MHz, and the flash memory access is in zero waiting state to obtain the highest efficiency.
The core control module in this embodiment is based on the GD32 chip, and a set of DSP phase control unit is mounted, and the phase control unit can effectively control the rectifier module, and the digitized control unit has high control efficiency and high precision.
As a preferred solution, but not limited to, the small-power rectifying module 5 includes a first common-cathode switching tube group, a first common-anode switching tube group, a second common-cathode switching tube group, and a second common-anode switching tube group, where each anode end of the first common-cathode switching tube group is connected to each cathode end of the first common-anode switching tube in a one-to-one correspondence manner, each anode end of the second common-cathode switching tube group is connected to each cathode end of the second common-anode switching tube group in a one-to-one correspondence manner, the common anode end of the first common-anode switching tube group and the common anode end of the second common-anode switching tube group are connected in parallel and are a negative end of the small-power rectifying module 5, the common cathode end of the first common-cathode switching tube group is a first positive end of the small-power rectifying module 5, and the common cathode end of the second common-cathode switching tube group is a second positive end of the small-power rectifying module 5.
In this embodiment, the first common-cathode switch tube group and the second common-cathode switch tube group are both composed of three thyristors, cathodes of the three thyristors are connected in parallel to form a common cathode end, the first common-anode switch tube group and the second common-anode switch tube group are both composed of three thyristors, and anodes of the three thyristors are connected in parallel to form a common anode end.
In this embodiment, the model of the thyristor is specifically TN4050-12PI, two ends of the thyristor are connected with RC filters, and each RC filter is specifically formed by connecting a capacitor and a resistor in series.
In the embodiment, the thyristors are sorted according to numbers for convenience of distinguishing, the common cathode groups are distributed in a singular mode, and the common anode groups are distributed in an even mode, wherein 1 and 4 are connected, 3 and 6 are connected, and 5 and 2 are connected. In order to make the output current more stable, the output ramp wave is more gentle.
In this embodiment, a twelve-pulse signal rectification mode is adopted, so that the thyristor groups in the scheme are divided into four groups, wherein the common anodes are connected in parallel and are output cathode ends, and the common cathode group adopts a three-pin inductor to perform shunt filtering and recombination for filtering out clutter from the current, so that the power quality is better.
As a preferred but non-limiting scheme, a protection module 7 is connected between the main ac power supply 1 and the transforming element 6, the protection module 7 includes an air switch QF1 and an ac contactor KM5, three input ends of the air switch QF1 are respectively connected with three-phase wires of the main ac power supply 1, three output ends of the air switch QF1 are respectively connected with three input ends of a main contact of the ac contactor KM5, a fuse F17, a fuse F18 and a fuse F19 are respectively connected between three output ends of the main contact of the ac contactor KM5 and a three-phase input end of a primary winding of the transforming element 6, a voltage transformer CT5 is connected between the fuse F17 and the primary winding of the transforming element 6, and a voltage transformer CT6 is connected between the fuse F19 and the primary winding of the transforming element 6.
In the embodiment, in order to avoid the dangerous situation caused by the fault of the low-power supply, the electricity safety is better ensured, the protection module 7 is additionally arranged between the main alternating-current power supply 1 and the transformation element 6, the on-off of the whole low-power rectification module 5 is controlled through the air switch QF1, the contactor is adopted to perform second-level control, the on-off of the power supply can be effectively ensured, meanwhile, the false triggering situation can be effectively prevented, the large voltage is converted into the small voltage through the voltage transformer, the core control module is connected, the voltage situation of the circuit can be better read, and the circuit can be better protected.
As a preferable scheme, but not limited to, the power supply system further comprises a direct current power supply 4, a current transformer is connected between the low-power rectification module 5 and the direct current power supply 4, a signal output end of the current transformer is connected with a signal input end of a current sampling module, and a signal output end of the current sampling module is connected with a current sampling end of the core control module.
In this implementation, in order to confirm that the output power is accurate and stable, adopt and be connected current transformer between the power output end of miniwatt rectifier module 5 and DC power supply 4, send the electric current on the circuit to the current sampling module again after diminishing through current transformer and carry out the sampling test, can confirm the stability of power better more accurately, and through the mode of closed loop, the electric current of power output is more accurate.
In this embodiment, be equipped with four control switches on direct current power supply 4's the output, control through the ac contactor who has the protector, when the forward current flows, ac contactor KM1 and KM4 are closed, and when the reverse current flows, ac contactor KM2 and KM3 are closed, no matter which direction of current is required to the naval vessel, can both carry out the output better to carry out the demagnetization operation.
As a preferable but not limited solution, the current sampling module includes a resistor R2, a resistor R66, a first operational amplifier chip U2, and a second operational amplifier chip U7, a first end of the resistor R2 is a signal input end of the current sampling module, a resistor R6 is connected between a second end of the resistor R2 and a first non-inverting end of the first operational amplifier chip U2, the resistor R7 is connected between the first non-inverting end of the first operational amplifier chip U2 and ground, a capacitor C1 is connected between the first non-inverting end of the first operational amplifier chip U2 and ground, a resistor R35 is connected between a first inverting end and a first output end of the first operational amplifier chip U2, a resistor R10 is connected between a second non-inverting end of the first operational amplifier chip U2 and ground, and a resistor R39 is connected between a second inverting end and a second output end of the first operational amplifier chip U2, it has resistance R56 to connect between the homophase end of chip U7 is put to first output and the second fortune of chip U2 to first fortune, it has resistance R59 to connect between the second output of chip U2 and the inverting terminal of second fortune chip U7 are put to first fortune, it has resistance R62 to connect between the inverting terminal of chip U7 and the output to put to second fortune, it has resistance R51 to connect between resistance R56 and the ground, resistance R56 with resistance R51's common terminal with chip U7 is put to the second fortune is connected, chip U7's output and the first end of resistance R66 are put to the second fortune, resistance R66's second end is current sampling module's signal output part, more than one electric capacity has been connect between current sampling module's signal output part and the ground.
This embodiment has adopted two binary channels fortune to put the chip and has sampled and handle current signal, wherein, first fortune is put chip U2 and is included U2A and U2B two parts, samples and operational amplification signal to positive and negative pole respectively, send to the second fortune again and put and carry out secondary sampling and secondary treatment on the chip U7, finally send into the signal that handles into the core control module and handle, can detect whether low-power rectifier module 5 is normal steadily high-efficiently, better guaranteed output current's stability.
Preferably, but not limited to, the transforming element 6 is provided with a thermal relay for preventing the transformer from overheating.
The transformation element 6 in this embodiment is specifically a three-phase transformer, and the transformation ratio thereof is 1 to 10, that is, in this embodiment, the input voltage is 650V, the output voltage thereof is 65V, and the transformer has two sets of output coils, each set is three-phase and three-wire, in order to prevent the circuit from generating unnecessary faults in the voltage reduction process and avoid the transformer from generating a long-term overcurrent condition, the transformation element 6 is connected with a thermal relay, so that the circuit can be timely disconnected in the case of overheating, and the transformer is protected from being damaged.
As a preferable solution, but not limited to, the first rectification module 2 includes a third common-cathode switching tube group and a third common-anode switching tube group, anode ends of the third common-cathode switching tube group are respectively connected to cathode ends of the third common-anode switching tube group in a one-to-one correspondence manner, a common anode end of the third common-anode switching tube group is a positive electrode end of the first rectification module 2, and a common cathode end of the third common-cathode switching tube group is a negative electrode end of the first rectification module 2.
The first rectification module 2 in this embodiment is a main circuit, and when the demagnetizing power supply normally works, the first rectification module 2 is used as a main working circuit, a six-pulse rectification manner is adopted, G poles of thyristors are respectively and correspondingly connected to the phase control unit, and are uniformly controlled and processed by the phase control unit, when a low-power supply is needed, the core control module sends an instruction to control the phase control unit to stop outputting a signal, and then the first rectification circuit stops running.
Preferably, but not limited to, the system further comprises a standby power supply 8, and the main alternating current power supply 1 and the standby power supply 8 are both three-phase three-wire 650V alternating current power supplies.
As an unconventional device, the operation stability of the unconventional device is self-evident, in order to ensure that the influence of abnormal power failure can be avoided in the operation process, a standby circuit is designed in the circuit to prevent the sudden power failure of the naval vessel in the demagnetization process, so that the normal use of the naval vessel is influenced, and in order to better eliminate the magnetism on the naval vessel, the embodiment adopts 650V three-phase power.
As a preferable embodiment, but not limited to, the rectifier further includes a second rectifier module 3, a power input end of the second rectifier module 3 is connected to an output end of the backup power supply 8, the second rectifier module 3 includes a fourth common-cathode switching tube group and a fourth common-anode switching tube group, anode ends of the fourth common-cathode switching tube group are respectively connected to cathode ends of the fourth common-anode switching tube group in a one-to-one correspondence manner, a common cathode end of the fourth common-cathode switching tube group is a positive end of the second rectifier module 3, and a common anode end of the fourth common-anode switching tube group is a negative end of the second rectifier module 3.
In this embodiment, the second rectification module 3 is a standby circuit, when the demagnetizing power supply normally works, the second rectification module 3 stops running as standby, a six-pulse rectification mode is adopted, G poles of thyristors are respectively and correspondingly connected to the phase control unit, and are uniformly controlled and processed by the phase control unit, when the main circuit is abnormal, the core control module sends an instruction to control the phase control unit to start an output signal, the standby circuit starts running, and the second rectification module 3 starts working.
In this embodiment, the power output ends of the current transformers connected to the first rectifier module 2, the second rectifier module 3 and the low-power rectifier module 5 are connected in parallel, and are further connected to one current transformer, so that the total current can be effectively sampled and detected, and the normal current of the whole circuit is ensured.
The foregoing is illustrative of one embodiment provided in connection with the detailed description and is not intended to limit the disclosure to the particular embodiments described. Similar or identical methods, structures, etc. as used herein, or several technical deductions or substitutions made on the premise of the idea of the present application, should be considered as the protection scope of the present application.
Claims (9)
1. A compatible high-power degaussing power supply comprises a main alternating current power supply and a first rectification module, wherein the output end of the main alternating current power supply is connected with the power input end of the first rectification module, and the high-power degaussing power supply is characterized by further comprising a core control module, a voltage transformation element, a low-power rectification module and a current sampling module, wherein the output end of the main alternating current power supply is connected with the power input end of the voltage transformation element, the power output end of the voltage transformation element is connected with the power input end of the low-power rectification module, the controlled end of the low-power rectification module is connected with the pulse signal end of the core control module, and the power output end of the low-power rectification module is connected with the current signal input end of the current sampling module.
2. The high-power degaussing power supply according to claim 1, wherein the low-power rectification module comprises a first common-cathode switch tube group, a first common-anode switch tube group, a second common-cathode switch tube group and a second common-anode switch tube group, anode ends of the first common-cathode switch tube group are respectively connected with cathode ends of the first common-anode switch tube in a one-to-one correspondence manner, anode ends of the second common-cathode switch tube group are respectively connected with cathode ends of the second common-anode switch tube group in a one-to-one correspondence manner, common anode ends of the first common-anode switch tube group and common anode ends of the second common-anode switch tube group are connected in parallel and are negative ends of the low-power rectification module, common cathode ends of the first common-cathode switch tube group are first positive ends of the low-power rectification module, and common cathode ends of the second common-cathode switch tube group are second positive ends of the low-power rectification module.
3. The high-power degaussing power supply according to claim 1, wherein a protection module is connected between the main ac power supply and the transforming element, the protection module comprises an air switch QF1 and an ac contactor KM5, three input ends of the air switch QF1 are respectively connected with three-phase wires of the main ac power supply, three output ends of the air switch QF1 are respectively connected with three input ends of a main contact of the ac contactor KM5, a fuse F17, a fuse F18 and a fuse F19 are respectively connected between three output ends of the main contact of the ac contactor KM5 and the three-phase input end of the primary winding of the transforming element, a voltage transformer CT5 is connected between the fuse F17 and the primary winding of the transforming element, and a voltage transformer CT6 is connected between the fuse F19 and the primary winding of the transforming element.
4. The high-power degaussing power supply according to claim 1, further comprising a dc power supply, wherein a current transformer is connected between the low-power rectifying module and the dc power supply, a signal output terminal of the current transformer is connected to a signal input terminal of the current sampling module, and a signal output terminal of the current sampling module is connected to a current sampling terminal of the core control module.
5. The high-power degaussing power supply according to claim 4, wherein the current sampling module comprises a resistor R2, a resistor R66, a first operational amplifier chip U2 and a second operational amplifier chip U7, a first end of the resistor R2 is a signal input end of the current sampling module, a resistor R6 is connected between a second end of the resistor R2 and a first non-inverting end of the first operational amplifier chip U2, a resistor R7 is connected between a first non-inverting end of the first operational amplifier chip U2 and ground, a capacitor C1 is connected between the first non-inverting end of the first operational amplifier chip U2 and ground, a resistor R35 is connected between a first inverting end and a first output end of the first operational amplifier chip U2, a resistor R10 is connected between a second non-inverting end of the first operational amplifier chip U2 and ground, it has resistance R39 to connect between the second inverting terminal of first fortune chip U2 and the second output, it has resistance R56 to connect between the homophase end of first output and the second fortune of chip U2 of first fortune chip U2, it has resistance R59 to connect between the second output of first fortune chip U2 and the inverting terminal of second fortune chip U7, it has resistance R62 to connect between the inverting terminal of second fortune chip U7 and the output, it has resistance R51 to connect between resistance R56 and the ground, resistance R56 with resistance R51's common terminal with chip U7 is put to the second fortune is connected, the output of second fortune chip U7 is connected with resistance R66's first end, resistance R66's second end is the signal output part of current sampling module, it has more than one electric capacity to connect between current sampling module's signal output part and the ground.
6. The high power degaussing power supply as claimed in claim 1, wherein the transformer element is provided with a thermal relay for preventing the transformer from overheating.
7. The high-power degaussing power supply according to claim 1, wherein the first rectification module comprises a third common-cathode switch tube group and a third common-anode switch tube group, anode ends of the third common-cathode switch tube group are respectively connected with cathode ends of the third common-anode switch tube group in a one-to-one correspondence manner, a common anode end of the third common-anode switch tube group is a positive end of the first rectification module, and a common cathode end of the third common-cathode switch tube group is a negative end of the first rectification module.
8. The high power degaussing power supply of claim 1, further comprising a backup power supply, wherein the main ac power supply and the backup power supply are both a three-phase, three-wire 650V ac power supply.
9. The high-power degaussing power supply according to claim 8, further comprising a second rectification module, wherein a power input terminal of the second rectification module is connected to an output terminal of the standby power supply, the second rectification module comprises a fourth common-cathode switching tube group and a fourth common-anode switching tube group, anode terminals of the fourth common-cathode switching tube group are respectively connected to cathode terminals of the fourth common-anode switching tube group in a one-to-one correspondence manner, a common cathode terminal of the fourth common-cathode switching tube group is a positive terminal of the second rectification module, and a common anode terminal of the fourth common-anode switching tube group is a negative terminal of the second rectification module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211705853.6A CN115765501A (en) | 2022-12-29 | 2022-12-29 | Compatible high-power demagnetization power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211705853.6A CN115765501A (en) | 2022-12-29 | 2022-12-29 | Compatible high-power demagnetization power supply |
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| CN115765501A true CN115765501A (en) | 2023-03-07 |
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|---|---|---|---|
| CN202211705853.6A Pending CN115765501A (en) | 2022-12-29 | 2022-12-29 | Compatible high-power demagnetization power supply |
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- 2022-12-29 CN CN202211705853.6A patent/CN115765501A/en active Pending
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