Rectifier remote touch control type adjusting device

Abstract

The utility model discloses a rectifier remote touch control type adjusting device, which belongs to the technical field of rectifier remote control and comprises a plurality of rectifiers and a rectifier control terminal connected with the rectifiers through a CAN (controller area network) bus and used for remote control. The rectifier control terminal comprises a voltage sensor, a current sensor, a sensor signal conditioning circuit, a current signal conditioning circuit, a voltage signal conditioning circuit, an analog switch unit, a voltage division following filtering unit, a controller module, a key input module, a USB interface circuit, a USB communication management module, a DDR3SDRAM, a DDR3 controller, a FlasH controller, a FlasH memory, an MLVDS communication unit and an MLVDS interface chip. A CAN communication wireless transmission technology is adopted, control data are transmitted to a CAN module in a data packet mode by calling a TCP / IP protocol, and the DC electroplating power supply is connected with a rectifier of the DC electroplating power supply through 4G multi-frequency bands, so that the effect of remotely controlling the rectifier is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rectifier remote control, in particular to a rectifier remote touch-controlled regulating device. Background Art

[0002] Many modern devices utilize a power supply to convert an AC input signal to a DC output signal to power the device or other load. The power supply may include a rectifier circuit that uses a diode bridge and / or an actively controlled switch to perform the conversion. Characteristics of the design that drives the rectifier circuit include conversion efficiency, reliability, interference generated (e.g., electromagnetic interference (EMI)), etc.

[0003] With the rapid development of industrial technology, power electronic devices characterized by high efficiency, energy saving, and high-quality and reasonable use of electric energy have achieved unprecedented development. Among them, the development of rectifiers is also changing with each passing day. According to power devices, they can be divided into three types: diode-based rectifiers, thyristor-based rectifiers, and IGBT-based PWM rectifiers. Since diode-based rectifiers are uncontrolled rectifiers, the diodes do not need to be controlled, and their protection is mostly completed by PLC controllers. The thyristor-based rectifier is a fully controlled rectifier, and its controller is mostly based on a DSP chip as the core, while performing communication, algorithm implementation, processing of various analog quantities and IO quantities, and generation of trigger pulses. Because its algorithm calculation is small and the control method is relatively simple, it can meet the needs of control. The IGBT-based PWM rectifier has become the development trend of current applications with its advantages of low harmonic pollution and high power factor. The IGBT-based PWM rectifier adopts pulse width modulation, and its control algorithm is relatively complex, and the processing cycle requires faster, so the controller with a DSP chip as the core cannot meet the requirements. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a rectifier remote touch-controlled adjustment device in view of the deficiencies of the background technology.

[0005] The utility model adopts the following technical solutions to solve the above technical problems:

[0006] A rectifier remote touch-controlled regulating device comprises a plurality of rectifiers and a rectifier control terminal for remote control connected to the rectifiers via a CAN bus; the rectifier control terminal comprises a voltage sensor, a current sensor, a sensor signal conditioning circuit, a current signal conditioning circuit, a voltage signal conditioning circuit, an analog switch unit, a voltage-dividing follower filter unit, a controller module, a key input module, a USB interface circuit, a USB communication management module, a DDR3 SDRAM, a DDR3 controller, a FlasH controller, a FlasH memory, an MLVDS communication unit, and an MLVDS interface chip; the voltage sensor and the current sensor are respectively connected to the controller module via the sensor signal conditioning circuit, the current signal conditioning circuit, the voltage signal conditioning circuit, the analog switch unit, and the voltage-dividing follower filter unit which are connected in sequence, the USB interface circuit is connected to the controller module via the USB communication management module, the DDR3 SDRAM is connected to the controller module via the DDR3 controller, the FlasH memory is connected to the controller module via the FlasH controller, and the controller module is connected to a second MLVDS interface chip via a second MLVDS communication unit.

[0007] As a further preferred embodiment of a rectifier remote touch-controlled adjustment device of the utility model, the sensor signal conditioning circuit includes an analog signal input terminal, a resistor R1, a resistor R2, a capacitor C1, and an operational amplifier U1. The analog signal input terminal is respectively connected to one end of the resistor R1 and one end of the resistor R2, the other end of the resistor R2 is connected to one end of the capacitor C1, the other end of the capacitor C1 is respectively connected to the other end of the resistor R1 and the positive input terminal of the operational amplifier U1, and the negative input terminal of the operational amplifier U1 is connected to the output terminal of the operational amplifier U1.

[0008] As a further preferred embodiment of the rectifier remote touch-controlled adjustment device of the utility model, the current signal conditioning circuit adopts the ACS714 chip of Allegro, which is a current-isolated current sensor with common-mode suppression field effect, and is composed of high-precision low-bias linear Hall sensors.

[0009] As a further preferred solution of the rectifier remote touch-controlled adjustment device of the utility model, the analog switch unit adopts an ADG706 chip.

[0010] As a further preferred embodiment of a rectifier remote touch-controlled adjustment device of the utility model, the voltage signal conditioning circuit includes a voltage signal input end, a resistor R3, a resistor R4, a resistor R5, a capacitor C2, and an operational amplifier U2. The voltage signal input end is connected to one end of the resistor R3, and the other end of the resistor R3 is respectively connected to one end of the resistor R4 and one end of the resistor R5, and the other end of the resistor R5 is connected to one end of the capacitor C2. The other end of the capacitor C2 is respectively connected to the other end of the resistor R4 and the positive input end of the operational amplifier U1, and the negative input end of the operational amplifier U2 is connected to the output end of the operational amplifier U2.

[0011] As a further preferred embodiment of a rectifier remote touch-controlled adjustment device of the utility model, the voltage divider follower filter unit includes an operational amplifier U3, a resistor R11, a resistor R12, an operational amplifier U4, a resistor R13, and a capacitor C7. The output end of the operational amplifier U3 is connected to one end of the resistor R12, and the other end of the resistor R12 is respectively connected to one end of the resistor R11 and the positive input end of the operational amplifier U4. The output end of the operational amplifier U4 is connected to one end of the resistor R13, and the other end of the resistor R13 is respectively connected to one end of the capacitor C7 and the A / D conversion unit. The other end of the capacitor C7 is grounded, and the other end of the resistor R11 is connected to the current signal conditioning circuit.

[0012] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects:

[0013] 1. The utility model discloses a rectifier remote touch-control adjustment device, which adopts CAN communication wireless transmission technology, transmits control data to the CAN module in the form of data packets by calling the TCP / IP protocol, and connects to the rectifier of the DC electroplating power supply through the 4G multi-band, so as to achieve the effect of remote control of the rectifier.

[0014] 2. Collect multi-channel sensor signals, voltage signals, and current signals. The collected signals are processed through signal conditioning, analog switches, voltage follower, and anti-aliasing filtering, and the link establishment time is analyzed. The successive approximation AD chip is used for conversion. The data collection accuracy is verified by cooperating with the host computer, and the circuit design is optimized. A detailed performance test is carried out on it. Compared with the traditional test system, the collected signal is more accurate, stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 This is a structural principle diagram of a rectifier remote touch-controlled adjustment device of the utility model;

[0017] Figure 2 It is the structural principle diagram of the rectifier control terminal of the utility model;

[0018] Figure 3 It is a circuit diagram of the sensor signal conditioning circuit of the utility model;

[0019] Figure 4 It is a circuit diagram of the voltage signal conditioning circuit of the utility model;

[0020] Figure 5 The utility model is a circuit diagram of a voltage-dividing follower filtering unit. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings:

[0022] 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.

[0023] A rectifier remote touch-control adjustment device comprises a plurality of rectifiers and a rectifier control terminal for remote control connected to the rectifiers via a CAN bus; the utility model discloses a rectifier remote touch-control adjustment device, which adopts CAN communication wireless transmission technology, transmits control data in the form of data packets to the CAN module by calling the TCP / IP protocol, and is connected to the rectifier of a DC electroplating power supply via the 4G multi-band, so as to achieve the effect of remote control of the rectifier.

[0024] like Figure 2As shown, the rectifier control terminal includes a voltage sensor, a current sensor, a sensor signal conditioning circuit, a current signal conditioning circuit, a voltage signal conditioning circuit, an analog switch unit, a voltage divider follower filter unit, a controller module, a key input module, a USB interface circuit, a USB communication management module, a DDR3 SDRAM, a DDR3 controller, a FlasH controller, a FlasH memory, an MLVDS communication unit, and an MLVDS interface chip; the voltage sensor and the current sensor are respectively connected to the controller module through the sensor signal conditioning circuit, the current signal conditioning circuit, the voltage signal conditioning circuit, the analog switch unit, and the voltage divider follower filter unit connected in sequence, the USB interface circuit is connected to the controller module through the USB communication management module, the DDR3 SDRAM is connected to the controller module through the DDR3 controller, the FlasH memory is connected to the controller module through the FlasH controller, and the controller module is connected to the second MLVDS interface chip through the second MLVDS communication unit.

[0025] The acquisition circuit needs to include a signal conditioning module, an analog switch module, a drive module, and an analog-to-digital conversion module. After conversion, the data is sent to the FPGA for processing, and finally the data is sent to the host computer through the RS422 interface. In order to eliminate the noise and interference in the original signal, it needs to be conditioned. The signal conditioning circuit can amplify, buffer, and calibrate the analog signal, reduce the noise accumulation in the original signal, and improve the signal's anti-interference ability.

[0026] like Figure 3 As shown, the sensor signal conditioning circuit includes an analog signal input terminal, a resistor R1, a resistor R2, a capacitor C1, and an operational amplifier U1. The analog signal input terminal is respectively connected to one end of the resistor R1 and one end of the resistor R2, the other end of the resistor R2 is connected to one end of the capacitor C1, the other end of the capacitor C1 is respectively connected to the other end of the resistor R1 and the positive input terminal of the operational amplifier U1, and the negative input terminal of the operational amplifier U1 is connected to the output terminal of the operational amplifier U1.

[0027] As the key component of the conditioning circuit, the utility model selects the AD8608 operational amplifier chip of ADI Company. The chip combines many excellent characteristics, has four-rail input and output while being powered by a single power supply, and can ensure high speed while also ensuring extremely low noise and input bias current, and is widely applicable to various circuits;

[0028] Since the input impedance of the op amp is generally very high, it is very susceptible to external interference when the input pin is left floating. Therefore, setting the resistor R2 can form a loop between the input end and the analog ground when the input pin is left floating, thereby ensuring the stability of the op amp.

[0029] like Figure 4As shown, the voltage signal conditioning circuit includes a voltage signal input terminal, a resistor R3, a resistor R4, a resistor R5, a capacitor C2, and an operational amplifier U2. The voltage signal input terminal is connected to one end of the resistor R3, the other end of the resistor R3 is respectively connected to one end of the resistor R4 and one end of the resistor R5, the other end of the resistor R5 is connected to one end of the capacitor C2, the other end of the capacitor C2 is respectively connected to the other end of the resistor R4 and the positive input terminal of the operational amplifier U1, and the negative input terminal of the operational amplifier U2 is connected to the output terminal of the operational amplifier U2.

[0030] In the voltage conditioning circuit, the circuit is as follows Figure 4 As shown in the figure, the rail-to-rail op amp can maximize the input and output voltage swings close to the power supply voltage value, but there is also a large deviation under high current conditions. Since the input voltage range of AD8608 is 0-0.5V, resistors R3 and R5 are set to form a voltage divider circuit to reduce the input voltage to below 5V.

[0031] According to the size of the current and the difference between AC and DC, the corresponding current collection methods are also different. Commonly used current collection methods include coaxial shunt method, current transformer method, Rogowski coil method, Hall sensor method and sampling resistor method, etc. The Hall sensor method is suitable for measuring both AC and DC currents, and can measure large currents. The current signal conditioning circuit adopts the ACS714 chip of Allegro, which is a current-isolated current sensor with common-mode suppression field effect, composed of high-precision low-bias linear Hall sensors.

[0032] The FGPA is used to control the analog switch to select the address switching channel to achieve the effect of time-sharing multiplexing. When switching channels, the analog switch will affect the change of capacitive load, resulting in signal oscillation or ringing. The faster the analog switch switching speed, the more obvious this phenomenon is. Therefore, the selection of analog switches is particularly important. By analyzing and comparing various types of analog switches, this design uses the ADG706 chip.

[0033] like Figure 5As shown, the voltage-dividing follower filter unit includes an operational amplifier U3, a resistor R11, a resistor R12, an operational amplifier U4, a resistor R13, and a capacitor C7. The output end of the operational amplifier U3 is connected to one end of the resistor R12, and the other end of the resistor R12 is respectively connected to one end of the resistor R11 and the positive input end of the operational amplifier U4. The output end of the operational amplifier U4 is connected to one end of the resistor R13, and the other end of the resistor R13 is respectively connected to one end of the capacitor C7 and the A / D conversion unit. The other end of the capacitor C7 is grounded, and the other end of the resistor R11 is connected to the current signal conditioning circuit. The signal passes through the analog switch and passes through the voltage-dividing % follower % filter circuit, and then is input into the AD converter. The voltage follower makes the circuit present a high-resistance input and a low-resistance output, thereby improving the circuit's load capacity. The chip models of the operational amplifier U3 and the operational amplifier U4 are AD8031. The maximum sampling current of the ACS714 chip is 5A.

[0034] 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.

[0035] 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.

[0036] 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 rectifier remote touch-controlled adjustment device, characterized in that: The invention comprises a plurality of rectifiers and a rectifier control terminal for remote control connected to the rectifiers via a CAN bus; the rectifier control terminal comprises a voltage sensor, a current sensor, a sensor signal conditioning circuit, a current signal conditioning circuit, a voltage signal conditioning circuit, an analog switch unit, a voltage-dividing follower filter unit, a controller module, a key input module, a USB interface circuit, a USB communication management module, a DDR3 SDRAM, a DDR3 controller, a FlasH controller, a FlasH memory, an MLVDS communication unit, and an MLVDS interface chip; the voltage sensor and the current sensor are respectively connected to the controller module via the sensor signal conditioning circuit, the current signal conditioning circuit, the voltage signal conditioning circuit, the analog switch unit, and the voltage-dividing follower filter unit which are connected in sequence, the USB interface circuit is connected to the controller module via the USB communication management module, the DDR3 SDRAM is connected to the controller module via the DDR3 controller, the FlasH memory is connected to the controller module via the FlasH controller, and the controller module is connected to a second MLVDS interface chip via a second MLVDS communication unit.

2. A rectifier remote touch-controlled adjustment device according to claim 1, characterized in that: The sensor signal conditioning circuit includes an analog signal input terminal, a resistor R1, a resistor R2, a capacitor C1, and an operational amplifier U1. The analog signal input terminal is respectively connected to one end of the resistor R1 and one end of the resistor R2, the other end of the resistor R2 is connected to one end of the capacitor C1, the other end of the capacitor C1 is respectively connected to the other end of the resistor R1 and the positive input terminal of the operational amplifier U1, and the negative input terminal of the operational amplifier U1 is connected to the output terminal of the operational amplifier U1.

3. A rectifier remote touch-controlled adjustment device according to claim 1, characterized in that: The current signal conditioning circuit adopts the ACS714 chip of Allegro Company, which is a current-isolated current sensor with common-mode field effect suppression and is composed of a high-precision low-bias linear Hall sensor.

4. The rectifier remote touch-control adjustment device according to claim 1, characterized in that: The analog switch unit adopts ADG706 chip.

5. The rectifier remote touch-control adjustment device according to claim 1, characterized in that: The voltage signal conditioning circuit includes a voltage signal input terminal, a resistor R3, a resistor R4, a resistor R5, a capacitor C2, and an operational amplifier U2. The voltage signal input terminal is connected to one end of the resistor R3, the other end of the resistor R3 is respectively connected to one end of the resistor R4 and one end of the resistor R5, the other end of the resistor R5 is connected to one end of the capacitor C2, the other end of the capacitor C2 is respectively connected to the other end of the resistor R4 and the positive input terminal of the operational amplifier U1, and the negative input terminal of the operational amplifier U2 is connected to the output terminal of the operational amplifier U2.

6. A rectifier remote touch-controlled adjustment device according to claim 1, characterized in that: The voltage divider follower filter unit includes an operational amplifier U3, a resistor R11, a resistor R12, an operational amplifier U4, a resistor R13, and a capacitor C7. The output end of the operational amplifier U3 is connected to one end of the resistor R12, and the other end of the resistor R12 is respectively connected to one end of the resistor R11 and the positive input end of the operational amplifier U4. The output end of the operational amplifier U4 is connected to one end of the resistor R13, and the other end of the resistor R13 is respectively connected to one end of the capacitor C7 and the A / D conversion unit. The other end of the capacitor C7 is grounded, and the other end of the resistor R11 is connected to the current signal conditioning circuit.

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