High-efficiency monopulse direct-current electroplating power supply

Abstract

The utility model discloses a high-efficiency monopulse direct-current electroplating power supply, which belongs to the technical field of monopulse rectification electroplating power supplies, and is characterized in that external power supply input is converted into alternating current through an inverter circuit module, then the required direct current is obtained through rectification and filtering, and finally, in a pulse conversion part, according to the setting of a user, the direct current is converted into direct current. Direct current or single pulse is output; after receiving a control signal of the controller module, the driving circuit and the pulse width modulation circuit drive a corresponding switch tube to enable the main circuit to start working, and meanwhile, the current detection circuit and the output sampling circuit feed back the detected and collected signal to the controller module in real time, so that the main circuit starts working. And the controller module compares the feedback signal with the parameters set by the user, and then adjusts the output control signal, so that dynamic adjustment is performed, and the circuit is ensured to output according to the parameters set by the user.

Description

Technical Field

[0001] The utility model relates to the technical field of three-phase alternating current zero-crossing and grounding signal output, in particular to a high-efficiency single-pulse direct current electroplating power supply. Background Art

[0002] Single-phase pulse rectifiers have been widely used in renewable energy power generation, uninterruptible power supplies, railway locomotive traction and other fields due to their advantages such as high grid-side power factor, small current harmonics, and bidirectional energy flow.

[0003] At present, there are many and relatively mature control methods for single-phase pulse rectifiers, which can be roughly divided into current control and power control. Among them, current control takes the grid-side current as the control object and accurately tracks the given grid-side current to achieve the control goals of grid-side unity power factor and constant DC-side voltage.

[0004] The amplitude and phase of a given grid-side current are closely related to the grid voltage. Power control takes the grid-side active and reactive power as the control object, and indirectly realizes the decoupling control of the active and reactive components of the grid-side current. The calculation of system power requires the extraction of information such as the amplitude and phase of the grid voltage fundamental wave.

[0005] Therefore, the realization of pulse rectifier current control and power control depends on the extraction of grid voltage information. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a high-efficiency single-pulse direct current electroplating power supply in view of the deficiencies of the background technology.

[0007] The utility model adopts the following technical solutions to solve the above technical problems:

[0008] A high-efficiency single-pulse DC electroplating power supply, comprising an external power supply, an inverter circuit module, a rectifier filter module, a load, a current detection module, a drive circuit module, a sampling and amplification module, an isolation feedback module, a pulse width modulation circuit, a controller module, a drive circuit, a liquid crystal display module, and an input module;

[0009] The output end of the external power supply is connected to the input end of the inverter circuit module, the output end of the inverter circuit module is connected to the input end of the rectifier and filter module, and the output end of the rectifier and filter module is connected to the input end of the load;

[0010] The output end of the external power supply is connected to the current detection module, the output end of the current detection module is connected to the input end of the pulse width modulation circuit, the output end of the pulse width modulation circuit is connected to the inverter circuit module through the drive circuit, the output end of the rectifier and filter module is connected to the input end of the control center through the sampling and amplification module and the isolation feedback module in sequence, the output end of the input module is connected to the input end of the controller module, the output end of the controller module is connected to the input end of the drive circuit, and the output end of the drive circuit is connected to the input end of the inverter circuit module.

[0011] As a further preferred embodiment of a high-efficiency single-pulse DC electroplating power supply of the utility model, the driving circuit module includes a gate voltage VH, a gate voltage VL, a switch tube MH, a switch tube ML, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, an inductor L, and an input voltage VIN. The gate voltage VH is connected to one end of the resistor R1, and the other end of the resistor R1 is respectively connected to the gate of the switch tube ML, one end of the capacitor C1 and one end of the capacitor C2, and the other end of the capacitor C1 is respectively connected to one end of the capacitor C5, the drain of the switch tube ML and the input voltage VIN. The other end of capacitor C5 is respectively connected to the other end of capacitor C2, the source of switch tube ML, one end of inductor L, one end of capacitor C6, one end of capacitor C3, and the drain of switch tube ML. The other end of capacitor C3 is respectively connected to one end of resistor R2, the gate of switch tube ML and one end of capacitor C4. The other end of resistor R2 is connected to gate voltage VL. The other end of capacitor C4 is respectively connected to the source of switch tube ML, the other end of capacitor C6, one end of capacitor C7 and one end of resistor R5. The other end of capacitor C7 is connected to one end of resistor R4. The other end of resistor R4 is respectively connected to one end of resistor R3 and the other end of resistor R5. The other end of resistor R3 is connected to the other end of inductor L.

[0012] As a further preferred solution of the high-efficiency single-pulse DC electroplating power supply of the utility model, the current detection module adopts a Hall sensor.

[0013] As a further preferred embodiment of a high-efficiency single-pulse DC electroplating power supply of the utility model, the rectifier and filter module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first operational amplifier, a second operational amplifier, and a third operational amplifier, wherein the signal input -IN terminal is connected to one end of the first resistor, the other end of the first resistor is respectively connected to one end of the first capacitor, one end of the third resistor and the negative power supply pin of the first operational amplifier, the other end of the first capacitor is respectively connected to the other end of the third resistor and the output pin of the first operational amplifier, the signal input +IN terminal is connected to one end of the second resistor, and the other end of the second resistor is respectively connected to the first operational amplifier The positive power pin of the amplifier, one end of the fourth resistor, and one end of the second capacitor, the other end of the second capacitor is connected to the other end of the fourth resistor and grounded, the output pin of the first operational amplifier is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the positive power pin of the second operational amplifier, the negative power pin of the second operational amplifier is connected to the negative power pin of the third operational amplifier, the positive power pin of the third operational amplifier is respectively connected to one end of the eighth resistor and one end of the ninth resistor, the other end of the ninth resistor is grounded, the other end of the eighth resistor is respectively connected to one end of the seventh resistor and the output pin of the second operational amplifier, the other end of the seventh resistor is connected to one end of the fourth capacitor, the other end of the fourth capacitor is respectively connected to one end of the ninth resistor, the other end of the ninth resistor is connected to one end of the third capacitor, and the other end of the third capacitor is grounded.

[0014] As a further preferred solution of the high-efficiency single-pulse DC electroplating power supply of the utility model, the chip model of the controller module is 68HC908MR16.

[0015] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects:

[0016] The utility model discloses a high-efficiency single-pulse DC electroplating power supply. The external power supply is input, converted into AC power through an inverter circuit module, and then rectified and filtered again to obtain the required DC power. Finally, in the pulse conversion part, according to the user's setting, the DC power or single pulse power is output. After receiving the control signal of the controller module, the drive circuit and the pulse width modulation circuit drive the corresponding switch tube to start the main circuit. At the same time, the current detection circuit and the output sampling circuit feed back the detected and collected signals to the controller module in real time. The controller module compares the feedback signal with the user-set parameters, and then adjusts the output control signal. In this way, dynamic adjustment is performed to ensure that the circuit outputs according to the parameters set by the user.

[0017] The driving circuit of the utility model is helpful to improve the high-frequency performance of the driving circuit. The output stage of the driving circuit of the utility model is composed of two gallium nitride enhanced NMOS devices and a low internal resistance inductor capacitor filter module. Due to the unique characteristics of the gallium nitride device, the operating frequency of the overall driving waveform is increased, and the low internal resistance inductor capacitor filter module can ensure the introduction of very small loss on the basis of completing the filtering. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention, and those skilled in the art can also refer to the embodiments without creative labor.

[0019] From these drawings, other drawings are derived.

[0020] Figure 1 This is a structural schematic diagram of a high-efficiency single-pulse DC electroplating power supply of the utility model;

[0021] Figure 2 It is a circuit diagram of the drive circuit module of the utility model;

[0022] Figure 3 It is a circuit diagram of the rectifier and filter module of the utility model. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings:

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A high-efficiency single-pulse DC plating power supply, such as Figure 1 As shown, it includes an external power supply, an inverter circuit module, a rectifier filter module, a load, a current detection module, a drive circuit module, a sampling and amplification module, an isolation feedback module, a pulse width modulation circuit, a controller module, a drive circuit, a liquid crystal display module, and an input module;

[0026] The output end of the external power supply is connected to the input end of the inverter circuit module, the output end of the inverter circuit module is connected to the input end of the rectifier and filter module, and the output end of the rectifier and filter module is connected to the input end of the load;

[0027] The output end of the external power supply is connected to the current detection module, the output end of the current detection module is connected to the input end of the pulse width modulation circuit, the output end of the pulse width modulation circuit is connected to the inverter circuit module through the drive circuit, the output end of the rectifier and filter module is connected to the input end of the control center through the sampling and amplification module and the isolation feedback module in sequence, the output end of the input module is connected to the input end of the controller module, the output end of the controller module is connected to the input end of the drive circuit, and the output end of the drive circuit is connected to the input end of the inverter circuit module.

[0028] like Figure 2 As shown, the driving circuit module includes a gate voltage VH, a gate voltage VL, a switch tube MH, a switch tube ML, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, an inductor L, and an input voltage VIN. The gate voltage VH is connected to one end of the resistor R1, and the other end of the resistor R1 is respectively connected to the gate of the switch tube ML, one end of the capacitor C1 and one end of the capacitor C2. The other end of the capacitor C1 is respectively connected to one end of the capacitor C5, the drain of the switch tube ML and the input voltage VIN, and the other end of the capacitor C5 is respectively connected to the gate of the switch tube ML. The other end of capacitor C2, the source of switch tube ML, one end of inductor L, one end of capacitor C6, one end of capacitor C3, and the drain of switch tube ML; the other end of capacitor C3 is respectively connected to one end of resistor R2, the gate of switch tube ML and one end of capacitor C4; the other end of resistor R2 is connected to gate voltage VL; the other end of capacitor C4 is respectively connected to the source of switch tube ML, the other end of capacitor C6, one end of capacitor C7 and one end of resistor R5; the other end of capacitor C7 is connected to one end of resistor R4; the other end of resistor R4 is respectively connected to one end of resistor R3 and the other end of resistor R5; the other end of resistor R3 is connected to the other end of inductor L.

[0029] The voltage value of the gate voltage VH is 1.4V, the voltage value of the gate voltage VL is 1.4V, the resistor R3 is the parasitic resistance of the inductor, the resistor R4 is the parasitic resistance of the capacitor, and the capacitors C2 and C4 are the gate-source voltages of the gallium nitride device.

[0030] Gallium nitride devices have many advantages over traditional power devices. Gallium nitride has lower on-resistance, smaller input capacitance, and less conduction loss. The high-frequency and high-voltage characteristics of gallium nitride devices are better than other types of devices, and have a wider range of applications. Gallium nitride transistors conduct electricity through two-dimensional electron gas formed by different materials, so there is no body diode reverse recovery problem of silicon-based devices. Gallium nitride power devices can achieve a higher slew rate! Therefore, frequency conversion can be performed faster than traditional devices.

[0031] The utility model has a gallium nitride device with an isolation gate structure and a gallium nitride device with a gate injection technology. The latter's gate structure has the advantage of clamping behavior, which can prevent gate overshoot. The gallium nitride device used in the utility model is an enhanced NMOS device, which is easy to build a driving circuit.

[0032] The power module is one of the sources of efficient electricity. In order to further improve the system efficiency, it is necessary to understand the system loss type of the power module and optimize the efficient drive system by analyzing the system loss factors and loss size.

[0033] The utility model suppresses the high current shoot-through phenomenon of the power device by adjusting the dead zone minimization processing module and the non-overlapping module, which helps to improve the efficiency of the power module, and utilizes the high frequency characteristics of the gallium nitride device to greatly increase the operating frequency of the power system.

[0034] The gallium nitride high-power device and filter module include two gallium nitride enhanced NMOS devices and a low internal resistance inductor and capacitor filter module. The gallium nitride high-power device and filter module help improve the high-frequency performance of the drive circuit. The output stage of the drive circuit is composed of two gallium nitride enhanced NMOS devices and a low internal resistance inductor and capacitor filter module. Due to the unique characteristics of the gallium nitride device, the operating frequency of the overall drive waveform is increased. The low internal resistance inductor and capacitor filter module can ensure that very little loss is introduced on the basis of completing the filtering.

[0035] A high-efficiency single-pulse direct current electroplating power supply, wherein the current detection module adopts a Hall sensor.

[0036] like Figure 3As shown, the rectification and filtering module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first operational amplifier, a second operational amplifier, and a third operational amplifier, wherein the signal input -IN terminal is connected to one end of the first resistor, the other end of the first resistor is respectively connected to one end of the first capacitor, one end of the third resistor and the negative power pin of the first operational amplifier, the other end of the first capacitor is respectively connected to the other end of the third resistor and the output pin of the first operational amplifier, the signal input +IN terminal is connected to one end of the second resistor, the other end of the second resistor is respectively connected to the positive power pin of the first operational amplifier, one end of the fourth resistor The output pin of the first operational amplifier is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the positive power pin of the second operational amplifier, the negative power pin of the second operational amplifier is connected to the negative power pin of the third operational amplifier, the positive power pin of the third operational amplifier is respectively connected to one end of the eighth resistor and one end of the ninth resistor, the other end of the ninth resistor is grounded, the other end of the eighth resistor is respectively connected to one end of the seventh resistor and the output pin of the second operational amplifier, the other end of the seventh resistor is connected to one end of the fourth capacitor, the other end of the fourth capacitor is respectively connected to one end of the ninth resistor, the other end of the ninth resistor is connected to one end of the third capacitor, and the other end of the third capacitor is grounded.

[0037] The signal processing module of the utility model amplifies and filters the data collected by the array sensor and then inputs it into the signal conversion circuit, which greatly reduces the signal noise and signal loss in the measurement. The amplification circuit part is composed of an OPA277 operational amplifier and a resistor and capacitor. This circuit is a typical differential amplifier circuit. At the same time, C3 and R6, C4 and R7 form a low-pass filter. The dual op amp bandpass filter is composed of two OPA277 operational amplifiers. The Q value and center frequency of the bandpass filter designed in this design are adjustable. The resonant frequency of the circuit can be adjusted by adjusting R9, and the Q value of the circuit can be adjusted by adjusting R8. It is worth noting that the array condensation sensor collects the condensation signal of each point, selects the multiplexed analog switch to output it to the signal processing circuit, and then inputs it to AD7794 for digital-to-analog conversion, converting the analog signal into a digital signal, which is conducive to long-distance wireless transmission of the signal.

[0038] The chip model of the controller module is 68HC908MR16.

[0039] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that those terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0040] The above embodiments are only for explaining the technical idea of ​​the utility model, and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution according to the technical idea proposed by the utility model shall fall within the protection scope of the utility model. The above embodiments of the utility model are described in detail, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the utility model.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A high-efficiency single-pulse DC electroplating power supply, characterized in that: It includes external power supply, inverter circuit module, rectifier filter module, load, current detection module, drive circuit module, sampling and amplification module, isolation feedback module, pulse width modulation circuit, controller module, drive circuit, LCD display module, and input module; The output end of the external power supply is connected to the input end of the inverter circuit module, the output end of the inverter circuit module is connected to the input end of the rectifier and filter module, and the output end of the rectifier and filter module is connected to the input end of the load; The output end of the external power supply is connected to the current detection module, the output end of the current detection module is connected to the input end of the pulse width modulation circuit, the output end of the pulse width modulation circuit is connected to the inverter circuit module through the drive circuit, the output end of the rectifier and filter module is connected to the input end of the control center through the sampling and amplification module and the isolation feedback module in sequence, the output end of the input module is connected to the input end of the controller module, the output end of the controller module is connected to the input end of the drive circuit, and the output end of the drive circuit is connected to the input end of the inverter circuit module.

2. A high-efficiency single-pulse DC electroplating power supply according to claim 1, characterized in that: The driving circuit module includes a gate voltage VH, a gate voltage VL, a switch tube MH, a switch tube ML, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, an inductor L, and an input voltage VIN. The gate voltage VH is connected to one end of the resistor R1, and the other end of the resistor R1 is respectively connected to the gate of the switch tube ML, one end of the capacitor C1 and one end of the capacitor C2. The other end of the capacitor C1 is respectively connected to one end of the capacitor C5, the drain of the switch tube ML and the input voltage VIN, and the other end of the capacitor C5 is respectively connected to the capacitor C6. The other end of C2, the source of the switch tube ML, one end of the inductor L, one end of the capacitor C6, one end of the capacitor C3, and the drain of the switch tube ML. The other end of the capacitor C3 is respectively connected to one end of the resistor R2, the gate of the switch tube ML and one end of the capacitor C4. The other end of the resistor R2 is connected to the gate voltage VL. The other end of the capacitor C4 is respectively connected to the source of the switch tube ML, the other end of the capacitor C6, one end of the capacitor C7 and one end of the resistor R5. The other end of the capacitor C7 is connected to one end of the resistor R4. The other end of the resistor R4 is respectively connected to one end of the resistor R3 and the other end of the resistor R5. The other end of the resistor R3 is connected to the other end of the inductor L.

3. A high-efficiency single-pulse DC electroplating power supply according to claim 1, characterized in that: The current detection module adopts a Hall sensor.

4. A high-efficiency single-pulse DC electroplating power supply according to claim 1, characterized in that: The rectifier and filter module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first operational amplifier, a second operational amplifier, and a third operational amplifier, wherein a signal input -IN terminal is connected to one end of the first resistor, the other end of the first resistor is respectively connected to one end of the first capacitor, one end of the third resistor and a negative power supply pin of the first operational amplifier, the other end of the first capacitor is respectively connected to the other end of the third resistor and an output pin of the first operational amplifier, and a signal input +IN terminal is connected to one end of the second resistor, the other end of the second resistor is respectively connected to a positive power supply pin of the first operational amplifier and one end of the fourth resistor , one end of the second capacitor, the other end of the second capacitor is connected to the other end of the fourth resistor and is grounded, the output pin of the first operational amplifier is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the positive power pin of the second operational amplifier, the negative power pin of the second operational amplifier is connected to the negative power pin of the third operational amplifier, the positive power pin of the third operational amplifier is respectively connected to one end of the eighth resistor and one end of the ninth resistor, the other end of the ninth resistor is grounded, the other end of the eighth resistor is respectively connected to one end of the seventh resistor and the output pin of the second operational amplifier, the other end of the seventh resistor is connected to one end of the fourth capacitor, the other end of the fourth capacitor is respectively connected to one end of the ninth resistor, the other end of the ninth resistor is connected to one end of the third capacitor, and the other end of the third capacitor is grounded.

5. A high-efficiency single-pulse DC electroplating power supply according to claim 1, characterized in that: The chip model of the controller module is 68HC908MR16.

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