CN111927303A - Pile driver driven and controlled by permanent magnet synchronous motor - Google Patents

Pile driver driven and controlled by permanent magnet synchronous motor Download PDF

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Publication number
CN111927303A
CN111927303A CN202010937355.9A CN202010937355A CN111927303A CN 111927303 A CN111927303 A CN 111927303A CN 202010937355 A CN202010937355 A CN 202010937355A CN 111927303 A CN111927303 A CN 111927303A
Authority
CN
China
Prior art keywords
permanent magnet
magnet synchronous
drive
pile driver
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010937355.9A
Other languages
Chinese (zh)
Inventor
欧新勤
李素俊
谭贤杨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Xinshuai Mechanical And Electrical Equipment Co ltd
Original Assignee
Guangzhou Xinshuai Mechanical And Electrical Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Xinshuai Mechanical And Electrical Equipment Co ltd filed Critical Guangzhou Xinshuai Mechanical And Electrical Equipment Co ltd
Priority to CN202010937355.9A priority Critical patent/CN111927303A/en
Publication of CN111927303A publication Critical patent/CN111927303A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/02—Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/02—Placing by driving
    • E02D7/06—Power-driven drivers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts
    • E21B15/003—Supports for the drilling machine, e.g. derricks or masts adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts
    • E21B15/04—Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B3/00—Rotary drilling
    • E21B3/02—Surface drives for rotary drilling
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/04—Arrangements for controlling or regulating the speed or torque of more than one motor

Abstract

The invention discloses a pile driver driven and controlled by a permanent magnet synchronous motor, which is simultaneously connected with two permanent magnet synchronous motors through a dual-drive speed reducer provided with a speed reduction transmission gear, and is connected with a pile driver drilling tool through an output device connected with the output end of the dual-drive speed reducer to output pile driving.

Description

Pile driver driven and controlled by permanent magnet synchronous motor
Technical Field
The invention relates to the technical field of engineering and construction equipment, in particular to a pile driver driven and controlled by a permanent magnet synchronous motor.
Background
With the development of society, high-rise buildings are more and more appeared, and the higher the floor is, the more and deeper foundation piles are needed.
The traditional screw pile driver is pile driving equipment which takes a high-power three-phase asynchronous motor as rotating power to drive a drill rod to quickly drill a hole underground in a dry mode. The three-phase asynchronous motor who uses like this, bulky, the quality is heavy, transmission efficiency is low, and low-speed output torque is little and the overspeed performance is poor, and traditional spiral pile driver can't satisfy the pile demand in hard soil layer because constant power output current can not change according to the change of pile resistance to and the pile demand of high rotational speed, the phenomenon that the pile process appears changelessly, is locked by the soil layer easily.
Disclosure of Invention
The invention aims to solve at least one technical problem in the prior art, and provides a pile driver driven and controlled by a permanent magnet synchronous motor, which can provide large torque at low rotating speed and improve the pile driving efficiency of the pile driver.
According to an embodiment of the first aspect of the invention, a driver driven and controlled by a permanent magnet synchronous motor is provided, which comprises:
the system host is connected with the two permanent magnet synchronous drive controllers;
the two permanent magnet synchronous motors are respectively and electrically connected with the two permanent magnet synchronous driving controllers;
the double-drive speed reducer is provided with two input mechanical interfaces and one output mechanical interface, a speed reduction transmission gear is connected between the two input mechanical interfaces and the output mechanical interface, and each input mechanical interface is mechanically connected with two permanent magnet synchronous motors respectively;
and the output device is mechanically connected with an output mechanical interface of the dual-drive speed reducer, and the output end of the output device is connected with a drilling tool of the pile machine.
Has the advantages that: this PMSM drive control's pile driver connects two PMSM simultaneously through the dual drive decelerator who is equipped with reduction drive gear to the output device that is connected with dual drive decelerator's output connects the pile machine drilling tool and exports the pile, this pile driver synthesizes PMSM's characteristic, can enlarge the output torque after two PMSM synchronous synthesis through dual drive decelerator's speed reduction ratio, can realize the big moment of torsion output under the little rotational speed condition, can effectively avoid the card machine problem of pile driver, thereby show improvement pile driving efficiency and pile driving quality.
According to the pile driver driven and controlled by the permanent magnet synchronous motors, each permanent magnet synchronous motor is provided with a feedback device, and the feedback devices are electrically connected with the permanent magnet synchronous driving controller to feed back information.
According to the pile driver driven and controlled by the permanent magnet synchronous motor, at least two of a temperature sensor, a rotating speed sensor, a current sensor and a voltage sensor are arranged in the feedback device.
According to the pile driver driven and controlled by the permanent magnet synchronous motor, the system host sends a rotating speed control command, a current control command and a torque control command to control the permanent magnet synchronous drive controller, the permanent magnet synchronous drive controller receives the rotating speed control command, the current control command and the torque control command to control the permanent magnet synchronous motor to rotate and drive the dual-drive speed reducer, and the dual-drive speed reducer drives the output device to rotate.
According to the pile driver driven and controlled by the permanent magnet synchronous motor, a system host controls the permanent magnet synchronous drive controller to drive the permanent magnet synchronous motor to rotate, the feedback device is embedded in the permanent magnet synchronous motor, and the feedback device detects a rotating speed signal, a current signal, a voltage signal, a temperature signal, a torque signal and a transmission efficiency signal and feeds the signals back to the permanent magnet synchronous drive controller to perform PID control on the permanent magnet synchronous motor so as to obtain output control on each permanent magnet synchronous motor.
According to the pile driver driven and controlled by the permanent magnet synchronous motors, the two permanent magnet synchronous motors are connected with the dual-drive speed reducing devices, the output ends of the dual-drive speed reducing devices are connected with the output ends of the output devices, and the output torque amplification factor of the output devices is equal to the speed ratio amplification factor of the dual-drive speed reducing devices.
According to the pile driver driven and controlled by the permanent magnet synchronous motor, a CPU module and a data storage module are arranged in the system host, and a serial port module for Ethernet connection is further arranged in the system host.
According to the pile driver driven and controlled by the permanent magnet synchronous motor, a man-machine touch screen and a start-stop button are further arranged on the system host.
According to the pile driver driven and controlled by the permanent magnet synchronous motor in the embodiment of the first aspect of the invention, each permanent magnet synchronous drive controller is embedded in the system host, and the system host is connected with each permanent magnet synchronous drive controller through the ethernet.
According to the pile driver driven and controlled by the permanent magnet synchronous motor, the pile driver drilling tool is a threaded drilling tool, the dual-drive speed reducer and the pile driver drilling tool synchronously run at the same angular speed, and the drilling or lifting displacement of the pile driver drilling tool is equal to the thread pitch of the pile driver drilling tool every time the pile driver drilling tool rotates for one circle.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the overall control principle of the pile driver in the embodiment of the invention;
fig. 3 is a schematic view of a connection structure between a system host and a permanent magnet synchronous motor according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 to 3, according to a first aspect embodiment of the present invention, there is provided a driver driven and controlled by a permanent magnet synchronous motor, including:
two permanent magnet synchronous drive controllers 110 connected to the system main unit 100 and the system main unit 100;
two permanent magnet synchronous motors 120 electrically connected to the two permanent magnet synchronous drive controllers 110, respectively;
the dual-drive reduction gear 130 is provided with two input mechanical interfaces and one output mechanical interface, a reduction transmission gear is connected between the two input mechanical interfaces and the output mechanical interface, and each input mechanical interface is mechanically connected with two permanent magnet synchronous motors 120 respectively;
and the output device 140 is mechanically connected with an output mechanical interface of the dual-drive reduction gear 130, and the output end of the output device 140 is connected with the pile machine drilling tool 150.
The pile driver driven and controlled by the permanent magnet synchronous motor 120 is simultaneously connected with the two permanent magnet synchronous motors 120 through the dual-drive speed reducing device 130 provided with the speed reducing transmission gear, and is connected with the pile driver drilling tool 150 through the output device 140 connected with the output end of the dual-drive speed reducing device 130 to output and pile driving, the pile driver integrates the characteristics of the permanent magnet synchronous motor 120, can enlarge the output torque after the two permanent magnet synchronous motors 120 are synchronously integrated through the speed reducing ratio of the dual-drive speed reducing device 130, can realize large torque output under the condition of small rotating speed, can effectively avoid the problem of blocking of the pile driver, and thus obviously improves the pile driving efficiency and the pile driving quality.
In some embodiments, each of the pmsm's 120 has a feedback device, and the feedback device feeds back information to the pmsm controller 110 through an electrical connection.
In some of these embodiments, at least two of a temperature sensor, a rotational speed sensor, a current sensor, and a voltage sensor are provided in the feedback device.
The permanent magnet synchronous drive controller 110 is configured to control the permanent magnet synchronous motor 120, receive a start/stop signal of the system host 100, and perform data interaction with the system host 100. The permanent magnet synchronous motor 120 is used to provide forward/reverse rotational power to the dual drive reduction gear 130.
The feedback device is internally provided with a temperature sensor, a rotating speed sensor and a current transformer and is used for feeding back data such as temperature, rotating speed, current and the like to the permanent magnet synchronous drive controller 110.
The top of the dual drive reduction gear 130 is provided with two input mechanical interfaces, which are mechanical interfaces of the motor, and one output mechanical interface at the bottom, and the middle is a reduction transmission gear, which provides mechanical interfaces for the two permanent magnet synchronous motors 120 and the output device 140.
In some embodiments, the system host 100 sends a rotation speed control command, a current control command and a torque control command to control the permanent magnet synchronous drive controller 110, and the permanent magnet synchronous drive controller 110 receives the rotation speed control command, the current control command and the torque control command to control the permanent magnet synchronous motor 120 to rotate and drive the dual-drive reduction gear 130, and the dual-drive reduction gear 130 drives the output device 140 to rotate.
In some embodiments, the system host 100 controls the permanent magnet synchronous drive controller 110 to drive the permanent magnet synchronous motors 120 to rotate, and a feedback device is embedded in the permanent magnet synchronous motors 120 and detects a rotation speed signal, a current signal, a voltage signal, a temperature signal, a torque signal and a transmission efficiency signal, and feeds the rotation speed signal, the current signal, the voltage signal, the temperature signal, the torque signal and the transmission efficiency signal back to the permanent magnet synchronous drive controller 110 to perform PID control on the permanent magnet synchronous motors 120, so as to obtain output control on each permanent magnet synchronous motor 120.
In some embodiments, the two pmps 120 are connected to the dual-drive reduction gear 130, the output end of the dual-drive reduction gear 130 is connected to the output of the output device 140, and the output torque amplification of the output device 140 is equal to the speed ratio amplification of the dual-drive reduction gear 130.
In some embodiments, the system host 100 is provided with a CPU module and a data storage module, and the system host 100 is further provided with a serial port module for ethernet connection.
In some embodiments, the system host 100 is further provided with a man-machine touch screen and a start-stop button.
In some embodiments, each permanent magnet synchronous drive controller 110 is embedded in the system host 100, and the system host 100 and each permanent magnet synchronous drive controller 110 are connected via an ethernet.
In some embodiments, the pile driver drilling tool 150 is a threaded drilling tool, the dual drive reduction gear 130 and the pile driver drilling tool 150 operate synchronously at the same angular velocity, and the drilling or lifting displacement of the pile driver drilling tool 150 is equal to the thread pitch of the pile driver drilling tool 150 for each rotation of the pile driver drilling tool 150.
After the drilling tool of the pile machine is extended into deep soil, the drilling tool of the pile machine can meet a hard geological layer, and at the moment, the permanent magnet synchronous motor 120 needs to be controlled to operate at a low rotating speed through the permanent magnet synchronous driving controller 110, so that the drilling tool 150 of the pile machine can be guaranteed to tunnel at the position of the hard geological layer at a low rotating speed and a high torque. At this time, the pile driver drilling tool 150 drills or lifts the depth equal to the pitch of the pile driver drilling tool 150 every time the pile driver drilling tool 150 rotates for one circle, so that the tunneling depth of the pile driver can be accurately controlled, and the tunneling accuracy of the pile driver is guaranteed.
The permanent magnet synchronous drive controller 110 has a control function of the permanent magnet synchronous motor 120 and a current, voltage, torque, temperature and transmission efficiency calculation and detection function, and is respectively used for controlling the rotation of the permanent magnet synchronous motor 120, and controlling the permanent magnet synchronous motor 120 by superposition compensation according to signals such as current, voltage and temperature fed back by the feedback device, so that the permanent magnet synchronous motor 120 meets target values of current, voltage, torque, temperature, transmission efficiency and the like set on the human-computer touch screen of the system host 100.
The permanent magnet synchronous drive controller 110 receives a start-stop signal of the system host 100 through the ethernet interface, and feeds back the working data.
The permanent magnet synchronous motor 120 comprises a motor stator and a motor rotor, wherein the motor rotor of the permanent magnet synchronous motor 120 is formed by winding a permanent magnet material, so that the overspeed can reach 3 times of the rated rotating speed of the permanent magnet synchronous motor 120, and the permanent magnet synchronous motor has excellent and accurate rotating speed and torque characteristics.
In this pile driver, the system host 100 sends control commands and accepts real-time data through an ethernet connection permanent magnet synchronous drive controller 110. The permanent magnet synchronous drive controller 110 receives the control command to control the two permanent magnet synchronous motors 120 respectively, and simultaneously, the sensors in the two feedback devices feed the real-time states of the permanent magnet synchronous motors 120 back to the permanent magnet synchronous drive controllers 110 respectively to perform compensation control, so that the permanent magnet synchronous motors 120 reach the target values of the rotating speed, the current and the torque given by the system host 100.
Excitation is added to the rotor of the permanent magnet synchronous motor 120, so that the rotating magnetic fields of the rotor and the stator rotate synchronously. Asynchronous motors are high-rated-speed motors, are extremely low in efficiency under the condition of low-rotating-speed and high-torque operation, and are easy to burn out for a long time. The rated speed of the permanent magnet synchronous motor 120 can be very low, and the motor can run with constant torque; in this pile driver system, the number of pole pairs of the permanent magnet synchronous motor 120 is designed to be large, so that the rated rotational speed of the permanent magnet synchronous motor 120 can be set to be low, and the operation efficiency thereof is not substantially affected, thereby realizing low rated rotational speed and large torque output through the permanent magnet synchronous motor 120.
In the pile driver, the dual-drive reduction device 130 performs mechanical gear reduction on the rotational speed of the motor input to the mechanical interface, so that the position of the output device 140 can obtain two-in-one output of the rotational torque of the permanent magnet synchronous motor 120, and the output torque is increased by several times through the reduction and conversion of the dual-drive reduction device 130. The clockwise/counterclockwise rotation of the permanent magnet synchronous motor 120 drives the output interface of the dual-drive reduction gear 130 to generate clockwise/counterclockwise rotation power, so that when the pile driver 150 of the pile driver encounters pile jamming in the deep layer, continuous pile driving operation can be performed through continuous low-rotation-speed and high-torque output, the situation that the pile driver is jammed or stopped cannot be caused, and the pile driving efficiency and the pile driving quality are remarkably improved.
The pile driver controls the permanent magnet synchronous drive controller 110 through the system host 100, the permanent magnet synchronous drive controller 110 controls the permanent magnet synchronous motor 120, and the feedback device is used for detecting and feeding back the permanent magnet synchronous drive controller 110 and the system host 100 to perform compensation control on the permanent magnet synchronous motor 120, so that the rotary output torque reaches the highest efficiency and is effectively used for making up the shortages of the traditional screw pile driver.
In the pile forming process of the pile driver, when concrete is pumped, the displacement rate of the drilling tool is matched with the drilling diameter of the drilling tool, and the precise control of the matching amount between the pumping amount of the concrete and the pumping execution mechanism is automatically calculated through programming, so that the pile driving quality is effectively improved, and the uncertain pile forming quality caused by artificial error construction is also avoided.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A driver of PMSM drive control, characterized by includes:
the system host is connected with the two permanent magnet synchronous drive controllers;
the two permanent magnet synchronous motors are respectively and electrically connected with the two permanent magnet synchronous driving controllers;
the double-drive speed reducer is provided with two input mechanical interfaces and one output mechanical interface, a speed reduction transmission gear is connected between the two input mechanical interfaces and the output mechanical interface, and each input mechanical interface is mechanically connected with two permanent magnet synchronous motors respectively;
and the output device is mechanically connected with an output mechanical interface of the dual-drive speed reducer, and the output end of the output device is connected with a drilling tool of the pile machine.
2. The PMSM drive-controlled pile driver of claim 1, wherein: each permanent magnet synchronous motor is provided with a feedback device, and the feedback devices are electrically connected with the feedback information to the permanent magnet synchronous driving controller.
3. The PMSM drive-controlled pile driver of claim 2, wherein: at least two of a temperature sensor, a rotating speed sensor, a current sensor and a voltage sensor are arranged in the feedback device.
4. The PMSM drive-controlled pile driver of claim 3, wherein: the system host sends a rotating speed control command, a current control command and a torque control command to control the permanent magnet synchronous drive controller, the permanent magnet synchronous drive controller receives the rotating speed control command, the current control command and the torque control command to control the permanent magnet synchronous motor to drive the dual-drive speed reducer in a rotating mode, and the dual-drive speed reducer drives the output device to rotate.
5. The PMSM drive-controlled pile driver of claim 4, wherein: therefore, the system host controls the permanent magnet synchronous drive controller to drive the permanent magnet synchronous motor to rotate, the feedback device is embedded in the permanent magnet synchronous motor, and the feedback device detects a rotating speed signal, a current signal, a voltage signal, a temperature signal, a torque signal and a transmission efficiency signal and feeds back the signals to the permanent magnet synchronous drive controller to perform PID control on the permanent magnet synchronous motor so as to obtain output control on each permanent magnet synchronous motor.
6. The PMSM drive-controlled pile driver of claim 1, wherein: the two permanent magnet synchronous motors are connected with the dual-drive speed reducing device, the output end of the dual-drive speed reducing device is connected with the output end of the output device, and the output torque amplification factor of the output device is equal to the speed ratio amplification factor of the dual-drive speed reducing device.
7. The PMSM drive-controlled pile driver of claim 1, wherein: the system host is internally provided with a CPU module and a data storage module, and is also internally provided with a serial port module for Ethernet connection.
8. The PMSM drive-controlled pile driver of claim 7, wherein: and the system host is also provided with a man-machine touch screen and a start-stop button.
9. The PMSM drive-controlled pile driver of claim 7, wherein: each permanent magnet synchronous drive controller is embedded into the system host, and the system host is connected with each permanent magnet synchronous drive controller through Ethernet.
10. The PMSM drive-controlled pile driver as claimed in any one of claims 1-9, wherein: the pile machine drilling tool is a threaded drilling tool, the dual-drive speed reducer and the pile machine drilling tool synchronously run at the same angular speed, and the drilling or lifting displacement of the pile machine drilling tool is equal to the thread pitch of the pile machine drilling tool every time the pile machine drilling tool rotates for one circle.
CN202010937355.9A 2020-09-08 2020-09-08 Pile driver driven and controlled by permanent magnet synchronous motor Pending CN111927303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010937355.9A CN111927303A (en) 2020-09-08 2020-09-08 Pile driver driven and controlled by permanent magnet synchronous motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010937355.9A CN111927303A (en) 2020-09-08 2020-09-08 Pile driver driven and controlled by permanent magnet synchronous motor

Publications (1)

Publication Number Publication Date
CN111927303A true CN111927303A (en) 2020-11-13

Family

ID=73309449

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010937355.9A Pending CN111927303A (en) 2020-09-08 2020-09-08 Pile driver driven and controlled by permanent magnet synchronous motor

Country Status (1)

Country Link
CN (1) CN111927303A (en)

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