Multi-channel hydraulic servo control module

Abstract

A multichannel hydraulic servo control module provided by the utility model comprises a power supply module, a driving module and a sampling control module, the power supply module is composed of a plurality of step-down chips, an FPGA2 chip and a DSP power supply chip, the power supply module is connected with the driving module, and an EMI filter is arranged between the power supply module and the driving module. The power supply module is connected with the sampling control module and is used for carrying out step-down super-do on an external power supply to generate voltage required by each circuit in the sampling control module, the driving module is formed by constructing three groups of driving modules and IGBT (Insulated Gate Bipolar Translator) modules, and the sampling module is a DSP (Digital Signal Processor) main control chip. An external interface of the DSP chip is fully utilized, so that an acquisition control module is realized, the complexity of a circuit is reduced, and high integration level and miniaturization are provided; in the signal processing part, the ADC conversion technology is adopted at the input end and the output end, simultaneous processing of multiple channels is achieved, and the response speed and the control precision of the control system are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of signal processing, and in particular relates to a multi-channel hydraulic servo control module. Background Art

[0002] Hydraulic servo control is a technology that uses hydraulic systems to achieve precise control of mechanical devices. In hydraulic servo control, the hydraulic system controls the movement of the actuator by adjusting the hydraulic flow, pressure and direction, thereby achieving precise position, speed and force control of the controlled object.

[0003] With the advancement of science and technology, the rapid development of microelectronics, computers, communications and digital fields, modern hydraulic servo control systems are also developing in the direction of digitization, intelligence and networking, and have been widely used in various industrial fields. Today, as DSP technology becomes increasingly mature, its application in servo control technology is not only conducive to improving the processing accuracy and multi-channel expansion of the control system, but also conducive to achieving low complexity and integrated design, thereby reducing costs. Therefore, the utility model proposes a multi-channel hydraulic servo control module. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a multi-channel hydraulic servo control module which realizes low complexity and integrated design.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: a multi-channel hydraulic servo control module, including a power supply module, a drive module and a sampling control module, the power supply module is composed of multiple step-down chips, FPGA2 chip, and DSP power supply chip, the power supply module is connected to the drive module, and an EMI filter is arranged between the power supply module and the drive module, the power supply module is connected to the sampling control module, the external power supply is stepped down to generate the voltage required by each circuit in the sampling control module, the drive module is constructed by three groups of drive modules and IGBT modules, and the sampling module is a DSP main control chip.

[0006] As an improvement, the plurality of step-down chips are URF1D24QB, URB2415YMD, B2412D, B2424D chips for outputting 24V, 15V, and 12V voltages; the FPGA2 is of the XC7Z045 chip; and the DSP power chip is of the TMS320C6748 chip.

[0007] As an improvement, the EMI filter adopts the SJD210D-20 / M4 module to complete the filtering of the 20A DC power supply.

[0008] As an improvement, the three groups of drive modules are connected to three 2500W-20A brushless DC motors, and the drive module is ED0215, and the IGBT module is FF150R12MS4G; the drive module is connected to the sampling control module through a PWM interface and a drive signal.

[0009] As an improvement, the DSP main control chip is used to complete the signal acquisition processing and control functions. The model of the DSP main control chip is TMS320F28335. The DSP main control chip is also provided with multiple GPIO interfaces for GPIO configuration functions of each chip module.

[0010] As an improvement, the DSP main control chip is connected to a DAC and a resolver sensor through an SPI interface to realize sampling signal conditioning of the Hall current / voltage sensor of the drive board, sampling and conditioning of the motor temperature signal, and excitation and signal processing of the resolver sensor; the model of the DAC chip is AD5721, and the model of the resolver sensor chip is PGA411.

[0011] As an improvement, the DSP main control chip is connected to the ADC and LVDT processing modules through the IIC interface to realize 4-way servo valve driving and current sampling; the model of the ADC chip is AD7998, and the LVDT processing module is AD698; the DSP main control chip is connected to the EEPROM through the IIC interface to realize the storage of acquisition and processing parameters; the model of the EEPROM chip is AT25160.

[0012] As an improvement, the DSP main control chip is connected to a CAN transceiver via a CAN interface to achieve communication with external devices; the model of the CAN chip is MCP2551.

[0013] The advantages of the utility model compared with the prior art are:

[0014] (1) By making full use of the external interface of the DSP chip, the acquisition control module is realized, the complexity of the circuit is reduced, and high integration and miniaturization are provided;

[0015] (2) In the signal processing part, ADC conversion technology is used at the input and output ends to achieve simultaneous processing of multiple channels, thereby improving the response speed and control accuracy of the control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a circuit block diagram of a multi-channel hydraulic servo control module.

[0017] Figure 2 The utility model is a circuit block diagram of a sampling control module of a multi-channel hydraulic servo control module.

[0018] Figure 3 The utility model is a power rail block diagram of a multi-channel hydraulic servo control module. DETAILED DESCRIPTION

[0019] 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.

[0020] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0021] Embodiment 1:

[0022] As the instruction manual Figure 1 As shown, it includes a power module, a drive module, a sampling control module, etc.

[0023] The main functions of this multi-channel hydraulic servo control module are to drive or excite the load equipment, collect signals from various sensors, process the signals by the DSP main control chip and perform position servo control and other functions.

[0024] When the multi-channel hydraulic servo control module is working, it receives control instructions from the upper computer through the CAN bus; it integrates the LVDT signals of the four-way actuators to form four-way servo valve control instructions to realize the position closed-loop control of the drive system; it integrates the resolver sensor (speed sensor) of the brushless DC motor (PMSM) to form the drive instructions of the PMSM to realize the servo drive function of the PMSM; it integrates the pressure sensor signal to form the motor start and stop control instructions to realize the functions of under-pressure oil replenishment and over-pressure pump stop, and reserves a pressure sensor signal receiving port.

[0025] In addition, this multi-channel hydraulic servo control mold has the function of detecting motor voltage and current; realizing the control function of one switch valve (110VDC PWM control) and one emergency solenoid valve (24VDC on-off control); having an interface for connecting ground detection equipment, and providing bus data and digital and analog interfaces for connecting ground detection equipment.

[0026] As the instruction manual Figure 2 As shown, the sampling control module uses a DSP main control chip to complete the signal acquisition, processing and control functions. The model of the DSP main control chip is TMS320F28335. The DSP main control chip is also provided with multiple GPIO interfaces for configuring the GPIO functions of each chip module.

[0027] The DSP main control chip is connected to the DAC and the resolver sensor through the SPI interface to realize the sampling signal conditioning of the Hall current / voltage sensor of the driver board, the sampling and conditioning of the motor temperature signal, and the excitation and signal processing of the resolver sensor; the model of the DAC chip is AD5721, and the model of the resolver sensor chip is PGA411.

[0028] The DSP main control chip is connected to the ADC and LVDT processing modules through the IIC interface to realize 4-way servo valve driving and current sampling; the model of the ADC chip is AD7998, and the LVDT processing module is AD698; the DSP main control chip is connected to the EEPROM through the IIC interface to realize the storage of acquisition and processing parameters; the model of the EEPROM chip is AT25160.

[0029] The DSP main control chip is connected to a CAN transceiver via a CAN interface to achieve communication with external devices; the model of the CAN chip is MCP2551.

[0030] As the instruction manual Figure 3 As shown, each chip in the multi-channel hydraulic servo control module is powered accordingly as shown in the figure to ensure that the multi-channel hydraulic servo control module can work normally.

[0031] The above describes the utility model and its implementation methods, which are not restrictive. The specific implementation method is only one of the implementation methods of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it, without departing from the purpose of the invention of the utility model, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the utility model.

Claims

1. A multi-channel hydraulic servo control module, characterized in that: It includes a power module, a drive module and a sampling control module. The power module is composed of multiple step-down chips, an FPGA2 chip and a DSP power chip. The power module is connected to the drive module, and an EMI filter is arranged between the power module and the drive module. The power module is connected to the sampling control module to step down the external power supply to generate the voltage required by each circuit in the sampling control module. The drive module is constructed by three groups of drive modules and an IGBT module. The sampling control module is a DSP main control chip.

2. A multi-channel hydraulic servo control module according to claim 1, characterized in that: The multiple step-down chips are chips of models URF1D24QB, URB2415YMD, B2412D, and B2424D, which are used for outputting 24V, 15V, and 12V voltages; the model of the FPGA2 is the XC7Z045 chip; and the model of the DSP power chip is the TMS320C6748 chip.

3. A multi-channel hydraulic servo control module according to claim 1, characterized in that: The EMI filter adopts the SJD210D-20 / M4 module to complete the filtering of the 20A DC power supply.

4. A multi-channel hydraulic servo control module according to claim 1, characterized in that: The three groups of drive modules are connected to three 2500W-20A brushless DC motors, and the drive module is ED0215, and the IGBT module is FF150R12MS4G; the drive module is connected to the sampling control module through a PWM interface and a drive signal.

5. The multi-channel hydraulic servo control module according to claim 1, characterized in that: The DSP main control chip is used to complete the signal acquisition processing and control functions. The model of the DSP main control chip is TMS320F28335. The DSP main control chip is also provided with multiple GPIO interfaces for GPIO configuration functions of each chip module.

6. A multi-channel hydraulic servo control module according to claim 1, characterized in that: The DSP main control chip is connected to a DAC and a resolver sensor via an SPI interface to implement sampling signal conditioning of the Hall current / voltage sensor of the drive board, sampling and conditioning of the motor temperature signal, and excitation and signal processing of the resolver sensor; the model of the DAC chip is AD5721, and the model of the resolver sensor chip is PGA411.

7. The multi-channel hydraulic servo control module according to claim 1, characterized in that: The DSP main control chip is connected to the ADC and LVDT processing modules through the IIC interface to realize 4-way servo valve driving and current sampling; the model of the ADC chip is AD7998, and the LVDT processing module is AD698; the DSP main control chip is connected to the EEPROM through the IIC interface to realize the storage of acquisition processing parameters; the model of the EEPROM chip is AT25160.

8. The multi-channel hydraulic servo control module according to claim 1, characterized in that: The DSP main control chip is connected to a CAN transceiver via a CAN interface to achieve communication with external devices; the model of the CAN chip is MCP2551.

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