Common direct current bus voltage electrodeless regeneration control device
阅读说明：本技术 一种共直流母线电压无极再生控制装置 (Common direct current bus voltage electrodeless regeneration control device ) 是由 刘政 秦奥伟 隋亮 李昆鹏 杨新论 于 2019-12-20 设计创作，主要内容包括：本发明装置为工业控制领域,涉及一种共直流母线电压无极再生控制装置,包括电压采样电路、电压设置电路、电源电路、数码管显示电路、MOS驱动电路和微控制器；所述微控制器包含ADC模块,所述ADC模块采集运放电路、光耦隔离电路处理后的电压信号和可调电位器的电压信号；所述电压采样电路通过电阻分压的方法采集直流母线电压；所述电源电路与微控制器、电压设置电路、数码管显示电路和MOS驱动电路相连,用于将外部提供的直流电压转化成不同的电压。本发明专利解决当多台电机处于协同工作状态时,直流母线电压升高的问题,降低了电源电压的波动,提高了设备运行的稳定性。(The invention relates to the field of industrial control, in particular to a common direct current bus voltage electrodeless regeneration control device, which comprises a voltage sampling circuit, a voltage setting circuit, a power supply circuit, a nixie tube display circuit, an MOS (metal oxide semiconductor) drive circuit and a microcontroller; the microcontroller comprises an ADC module, and the ADC module acquires voltage signals processed by the operational amplifier circuit and the optical coupling isolation circuit and voltage signals of the adjustable potentiometer; the voltage sampling circuit collects the voltage of the direct current bus by a resistance voltage division method; the power supply circuit is connected with the microcontroller, the voltage setting circuit, the nixie tube display circuit and the MOS drive circuit and is used for converting direct-current voltage provided by the outside into different voltages. The invention solves the problem that the voltage of the direct current bus is increased when a plurality of motors are in a cooperative working state, reduces the fluctuation of the power voltage and improves the stability of the operation of equipment.)
1. A common direct current bus voltage electrodeless regeneration control device is characterized by comprising a voltage sampling circuit, a voltage setting circuit, a power circuit, a nixie tube display circuit, an MOS (metal oxide semiconductor) drive circuit and a microcontroller;
the microcontroller comprises an ADC module, and the ADC module acquires voltage signals processed by the operational amplifier circuit and the optical coupling isolation circuit and voltage signals of the adjustable potentiometer;
the voltage sampling circuit collects the voltage of the direct current bus by a resistance voltage division method;
the power supply circuit is connected with the microcontroller, the voltage setting circuit, the nixie tube display circuit and the MOS drive circuit and is used for converting direct-current voltage provided by the outside into different voltages;
the nixie tube display circuit is connected with the microcontroller, and the voltage change of the adjustable potentiometer acquired by the microcontroller is displayed through the nixie tube display screen;
and the MOS drive circuit is connected with the microcontroller and the MOS tube.
2. The electrodeless regeneration control device for the voltage of the common direct current bus as claimed in claim 1, wherein the voltage signal collected by the voltage sampling circuit is subjected to signal amplification and signal isolation by the operational amplifier circuit and the optical coupler circuit, and the amplified and isolated voltage signal is used for the microcontroller to collect the voltage signal through the ADC module.
3. The electrodeless regeneration control device for the voltage of the common direct current bus as claimed in claim 1, wherein the voltage setting circuit causes the voltage to change by adjusting the resistance value of the adjustable potentiometer, and the voltage signal generated by the adjustable potentiometer is used for the microcontroller to acquire the voltage signal of the adjustable potentiometer through the ADC module.
4. The electrodeless regeneration control device for the voltage of the common direct current bus as claimed in claim 1, wherein when the voltage of the common direct current bus is higher than the rated voltage, the microcontroller sends a control signal to the MOS driving circuit, and the MOS driving circuit controls the MOS transistor to be switched on and off.
5. A common DC bus voltage electrodeless regeneration control device as claimed in claim 1, wherein said device comprises a housing, a PCB and a regeneration resistor.
6. A common direct current bus voltage electrodeless regeneration control device as claimed in claim 1, wherein the housing is a hexahedron made of aluminum material, and comprises a back plate, a front plate and a side plate;
the back plate is L-shaped, and a plurality of fixing and positioning holes are formed in the back plate;
a nixie tube display screen is arranged on the front plate;
the PCB comprises a circuit of the device and electronic components, the front surface of the PCB comprises a nixie tube display and adjustable potentiometer, and the side surface of the PCB comprises a direct current bus voltage interface, a power supply interface and an external regenerative resistor interface;
and two ends of the regenerative resistor are connected with the PCB.
7. The electrodeless regeneration control device for the common direct current bus voltage as claimed in claim 1, wherein a heat dissipation mesh surface is arranged on the side plate, and a direct current bus interface is arranged on the side of the heat dissipation hole; and a direct-current power supply interface is arranged below the direct-current bus interface, and an external regenerative resistor interface is arranged below the direct-current power supply interface.
8. A common direct current bus voltage electrodeless regeneration control device as claimed in claim 1, wherein an adjustable potentiometer is arranged below the nixie tube display screen.
9. The electrodeless regeneration control device for the voltage of the common direct current bus bar as claimed in claim 1, wherein the fixing hole is U-shaped, and the inner diameter of the fixing hole is 3.5 mm.
10. A common direct current bus voltage electrodeless regeneration control device as claimed in claim 1, wherein said device is powered by a 24V direct current power supply.
Technical Field
The invention belongs to the field of industrial control, relates to a common direct current bus voltage electrodeless regeneration control device, and particularly relates to a servo driver system, wherein multiple motors are in a cooperative working state, so that the stability of direct current bus voltage is ensured.
Background
For equipment such as a high-precision machine tool, a scene of multi-motor cooperative work is needed. In the multi-motor driven variable frequency speed control system, each motor is in different working states, and when a plurality of motors are in a power generation state, the voltage of a direct current bus can be instantly increased. When the voltage of the dc bus is higher than the rated voltage, irreversible damage may occur to the power supply equipment and the mechanical equipment. In order to avoid large fluctuation of the voltage of the direct current bus, when the voltage of the direct current bus is higher than the rated voltage, the direct current bus and the regenerative resistor are in a connected state, the voltage of the direct current bus is reduced, and the stability of the power voltage is improved.
Disclosure of Invention
The invention aims to provide a common direct current bus voltage stepless regeneration control device which automatically detects the voltage change of a direct current bus, and when the voltage of the direct current bus exceeds the rated voltage, the device switches the direct current bus and a regeneration resistor to a connection state to reduce the voltage of the direct current bus. The invention solves the problem that the voltage of the direct current bus is increased when a plurality of motors are in a cooperative working state, reduces the fluctuation of the power voltage and improves the stability of the operation of equipment.
In order to achieve the purpose, the invention provides the following technical scheme:
a common direct current bus voltage electrodeless regeneration control device comprises a voltage sampling circuit, a voltage setting circuit, a power circuit, a nixie tube display circuit, an MOS (metal oxide semiconductor) drive circuit and a microcontroller;
the microcontroller comprises an ADC module, and the ADC module acquires voltage signals processed by the operational amplifier circuit and the optical coupling isolation circuit and voltage signals of the adjustable potentiometer;
the voltage sampling circuit collects the voltage of the direct current bus by a resistance voltage division method;
the power supply circuit is connected with the microcontroller, the voltage setting circuit, the nixie tube display circuit and the MOS drive circuit and is used for converting direct-current voltage provided by the outside into different voltages;
the nixie tube display circuit is connected with the microcontroller, and the microcontroller displays the acquired voltage change of the adjustable potentiometer through the nixie tube display screen;
and the MOS drive circuit is connected with the microcontroller and the MOS tube.
Furthermore, the voltage signal collected by the voltage sampling circuit is subjected to signal amplification and signal isolation by the operational amplifier circuit and the optical coupling circuit, and the amplified and isolated voltage signal is used for the microcontroller to collect the voltage signal through the ADC module.
Furthermore, the voltage setting circuit causes voltage change by adjusting the resistance value of the adjustable potentiometer, and a voltage signal generated by the adjustable potentiometer is used for the microcontroller to acquire the voltage signal of the adjustable potentiometer through the ADC module.
Further, when the voltage of the direct current bus is higher than the rated voltage, the microcontroller sends a control signal to the MOS drive circuit, and the MOS drive circuit controls the on and off of the MOS tube.
Further, the device comprises a shell, a PCB and a regenerative resistor.
Further, the shell is a hexahedron made of aluminum materials and comprises a back plate, a front plate and side plates;
the back plate is L-shaped, and a plurality of fixing and positioning holes are formed in the back plate;
a nixie tube display screen is arranged on the front plate;
the PCB comprises a circuit of the device and electronic components, the front surface of the PCB comprises a nixie tube display and adjustable potentiometer, and the side surface of the PCB comprises a direct current bus voltage interface, a power supply interface and an external regenerative resistor interface;
and two ends of the regenerative resistor are connected with the PCB.
Furthermore, a radiating net surface is arranged on the side plate, and a direct current bus interface is arranged on the side of the radiating hole; and a direct-current power supply interface is arranged below the direct-current bus interface, and an external regenerative resistor interface is arranged below the direct-current power supply interface.
Furthermore, an adjustable potentiometer is arranged below the nixie tube display screen.
Furthermore, the fixing and positioning hole is U-shaped, and the inner diameter of the fixing and positioning hole is 3.5 mm.
Further, the device is powered by a 24V direct current power supply.
Has the advantages that:
in the multi-motor driven variable frequency speed control system, the design of sharing a direct current bus is adopted for multiple motors. When a plurality of motors work simultaneously, because each motor is in different working states, the voltage of the direct current bus cannot generate large-amplitude voltage fluctuation. However, when the plurality of motors are in the deceleration state and the motor is in the power generation state at the same time, the voltage of the dc bus is instantaneously increased. When the voltage of the dc bus is higher than the rated voltage, irreversible damage may occur to the power supply equipment and the mechanical equipment. Aiming at the situation, the common direct current bus voltage stepless regeneration control device can automatically detect the voltage change of the direct current bus, and when the voltage of the direct current bus exceeds the rated voltage, the device switches the direct current bus and the regeneration resistor to a connection state to reduce the voltage of the direct current bus. The invention solves the problem that the voltage of the direct current bus is increased when a plurality of motors are in a cooperative working state, reduces the fluctuation of the power voltage and improves the stability of the operation of equipment.
Drawings
FIG. 1 is a system block diagram of a common DC bus voltage stepless regeneration control device;
FIG. 2 is a front view of a common DC bus voltage electrodeless regeneration control device;
FIG. 3 is a side view of a common DC bus voltage electrodeless regeneration control device;
FIG. 4 is a top view of a common DC bus voltage electrodeless regeneration control device;
fig. 5 is a perspective view of a common dc bus voltage stepless regeneration control device.
Description of the reference numerals
1. A back plate; 2. a nixie tube display screen; 3. an adjustable potentiometer; 4. a front plate; 5. fixing the positioning hole; 6. a side plate; 7. a direct current bus voltage interface; 8. a DC power supply interface; 9. connecting a regenerative resistor interface; 10. and (4) heat dissipation holes.
Detailed Description
A common direct current bus voltage electrodeless regeneration control device comprises a shell, a PCB and a regeneration resistor.
The shell is a hexahedron made of aluminum materials and comprises a back plate 1, a
the back plate 1 is L-shaped, and the back plate 1 is processed from L-shaped aluminum materials. The back plate 1 is provided with a plurality of fixing and positioning holes 5, the fixing and positioning holes 5 are U-shaped, and the inner diameter of each fixing and positioning hole 5 is 3.5 mm; the shell is fixed through an M3 cross countersunk head screw; the equipment can be installed and fixed at multiple angles; the fixing holes 5 are arranged on the upper side and the lower side of the back plate, and 2 fixing holes are arranged on each side.
The
an adjustable potentiometer 3 is arranged below the nixie tube display screen 2, and the size of rated voltage can be set by twisting a knob of the adjustable potentiometer through a straight screwdriver or a cross screwdriver. The adjusting device of the adjustable potentiometer 3 is positioned in the common direct current bus voltage stepless regeneration control device and must go deep into the device through a screwdriver for adjustment, and the design avoids the damage or other irreversible results of equipment caused by mistakenly touching the knob of the adjustable potentiometer.
The
the direct
The PCB comprises the device circuit and electronic components, the front surface of the PCB comprises a nixie tube display and adjustable potentiometer, and the side surface of the PCB comprises a direct current bus voltage interface, a power supply interface and an external regenerative resistor interface. Fixing holes with the inner diameter of 3.5mm are processed at four corners of the PCB and used for fixing the PCB. The fixing holes at the four corners of the PCB are fixed with the back plate through M3 cross countersunk head screws.
Two sides of the regenerative resistor are provided with symmetrical fixing holes, and each side of the regenerative resistor contains 3 fixing holes with the inner diameter of 3.5mm and is used for fixing the regenerative resistor. The 6 fixing holes of the regenerative resistor are fixed with the back plate through M3 cross countersunk head screws. And two ends of the regenerative resistor are connected with the PCB through 1 square millimeter of conducting wires for electrically connecting the PCB and the regenerative resistor.
A common direct current bus voltage electrodeless regeneration control device comprises a voltage sampling circuit, a voltage setting circuit, a power circuit, a nixie tube display circuit, an MOS (metal oxide semiconductor) drive circuit and a Microcontroller (MCU); the voltage sampling circuit acquires direct-current bus voltage by a resistance voltage division method, voltage signals acquired by the voltage sampling circuit are subjected to signal amplification and signal isolation by an operational amplifier circuit and an optical coupler circuit, and the amplified and isolated voltage signals are connected with an ADC (analog-to-digital converter) module of a Microcontroller (MCU) and are used for the Microcontroller (MCU) to acquire voltage signals through the ADC module; the voltage setting circuit is used for adjusting the resistance value of the adjustable potentiometer to cause the change of voltage due to the change of the resistance value of the adjustable potentiometer, and a voltage signal generated by the adjustable potentiometer is connected with an ADC (analog to digital converter) module of a Microcontroller (MCU) and is used for the Microcontroller (MCU) to acquire the voltage signal of the adjustable potentiometer through the high-speed ADC module; the microcontroller comprises an ADC module, and the ADC module acquires voltage signals processed by the operational amplifier circuit and the optical coupling isolation circuit and voltage signals of the adjustable potentiometer; the power supply circuit is connected with the microcontroller, the voltage setting circuit, the nixie tube display circuit and the MOS drive circuit and is used for converting 24V direct-current voltage provided by the outside into different voltages and providing power for the circuits; the nixie tube display circuit is connected with a Microcontroller (MCU) and displays the voltage change of the adjustable potentiometer acquired by the microcontroller through a 3-bit nixie tube display screen; the MOS drive circuit is connected with the microcontroller and the MOS tube and used for sending a control signal to the MOS drive circuit when the voltage of the direct-current bus is higher than the rated voltage, and the MOS drive circuit controls the on and off of the MOS tube.
In the multi-motor driven variable frequency speed regulation system, when the voltage of a direct current bus is higher than the rated voltage, the common direct current bus voltage stepless regeneration control device sends a control signal to an MOS (metal oxide semiconductor) drive circuit through a microcontroller, the MOS drive circuit controls the conduction of an MOS (metal oxide semiconductor) tube so as to control the connection of the direct current bus and a regeneration resistor, and the voltage on the direct current bus dissipates redundant energy on the regeneration resistor through the regeneration resistor so as to reduce the voltage on the direct current bus.
Firstly, the rated voltage of the direct current bus needs to be set through an adjustable potentiometer, the set rated voltage of the direct current bus is displayed through a nixie tube, and the set voltage number is visually displayed. The high-performance microcontroller collects the voltage of the adjustable potentiometer through the high-speed ADC module, compares the voltage with the collected voltage of the direct current bus, and judges whether the voltage of the direct current bus is higher than the set rated voltage. The direct current bus voltage acquisition is to amplify millivolt-level voltage obtained by dividing the voltage of the resistor through the resistor voltage dividing circuit and the operational amplifier. The voltage that operational amplifier gathered passes through linear opto-coupler, and linear opto-coupler carries out circuit isolation with the high-pressure side and the low pressure side of this device, avoids the high-pressure side to cause the influence to control circuit. And a high-speed ADC module of the microcontroller collects voltage signals passing through the linear optocoupler for multiple times to obtain the voltage change of the direct-current bus. The microcontroller collects the voltage of the direct current bus and the voltage of the adjustable potentiometer through the high-speed ADC module, and compares the collected voltage data. When the voltage of the direct current bus is higher than the set rated voltage, the microcontroller sends a control signal to the MOS drive circuit, the MOS drive circuit controls the conduction of the MOSFET, the direct current bus and the regenerative resistor are in a connected state, and the voltage of the direct current bus is reduced. When the direct current bus is connected with the regenerative resistor, the voltage of the direct current bus is gradually reduced along with the time change, the microcontroller collects the voltage of the direct current bus through the high-speed ADC module, the voltage of the direct current bus is lower than the set rated voltage, the microcontroller sends a control signal to the MOS drive circuit, the MOS drive circuit controls the MOSFET to be switched off, and the direct current bus and the regenerative resistor are in a disconnected state. When the voltage of the direct current bus is lower than the set rated voltage, the microcontroller does not send a control signal to the MOS drive circuit, the MOSFET is always in a turn-off state, and the direct current bus and the regenerative resistor are also in a turn-off state.
The device adopts a 24V direct current power supply to supply power, and the inside of the device converts voltages of different grades through different power chips to provide power for the internal chips.
The device is internally provided with the regenerative resistor, when the number of the motors mounted on the direct current bus and the capacity of the motors exceed the requirements of the device, the device can be externally connected with the regenerative resistor, and the equipment has an interface externally connected with the regenerative resistor, so that the requirements of different users can be met conveniently.
In the multi-motor driven variable frequency speed control system, the design of sharing a direct current bus is adopted for multiple motors. When a plurality of motors work simultaneously, because each motor is in different working states, the voltage of the direct current bus cannot generate large-amplitude voltage fluctuation. However, when the plurality of motors are in the deceleration state and the motor is in the power generation state at the same time, the voltage of the dc bus is instantaneously increased. When the voltage of the dc bus is higher than the rated voltage, irreversible damage may occur to the power supply equipment and the mechanical equipment. Aiming at the situation, the common direct current bus voltage stepless regeneration control device can automatically detect the voltage change of the direct current bus, and when the voltage of the direct current bus exceeds the rated voltage, the device switches the direct current bus and the regeneration resistor to be in a connected state, so that the voltage of the direct current bus is reduced. The invention solves the problem that the voltage of the direct current bus is increased when a plurality of motors are in a cooperative working state, reduces the fluctuation of the power voltage and improves the stability of the operation of equipment.
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