CN117040353A - Speed regulating system and control method of switch reluctance motor for punch press - Google Patents
Speed regulating system and control method of switch reluctance motor for punch press Download PDFInfo
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- CN117040353A CN117040353A CN202310659983.9A CN202310659983A CN117040353A CN 117040353 A CN117040353 A CN 117040353A CN 202310659983 A CN202310659983 A CN 202310659983A CN 117040353 A CN117040353 A CN 117040353A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 16
- 238000004080 punching Methods 0.000 claims abstract description 50
- 238000005070 sampling Methods 0.000 claims description 22
- 230000001276 controlling effect Effects 0.000 claims description 15
- 230000001133 acceleration Effects 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- 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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/08—Reluctance motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass
-
- 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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/163—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual reluctance motor
-
- 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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/0004—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
-
- 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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/20—Controlling the acceleration or deceleration
-
- 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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/08—Reluctance motors
- H02P25/0805—Reluctance motors whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
-
- 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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
-
- 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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/065—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a reluctance motor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The application discloses a speed regulating system and a control method of a switched reluctance motor for a punch press, belonging to the field of energy-saving application of punch presses in the machine tool industry, wherein the speed regulating system of the switched reluctance motor for the punch press comprises: the device comprises a switch reluctance motor controller, a switch reluctance motor, a punch press controller, an encoder, a circuit breaker, a travel switch, a loading key, a start-stop switch and a sliding block; the excellent starting performance of the switch reluctance motor is utilized, so that huge impact on mechanical parts and a power grid during starting is reduced; when the punching machine is in idle load, the idle load rotating speed is controlled to be in an extremely low or stop state, and when in punching, the rotating speed is instantaneously increased to the rated rotating speed of the punching machine through the strong starting accelerating capacity of the switched reluctance motor, so that the energy consumption of the punching machine is greatly saved; the production period of the punching machine is controlled by adopting multiple stages of speeds, so that the whole system works in an optimal running state, and the economical efficiency is high.
Description
Technical Field
The application relates to the field of energy-saving application of punches in the machine tool industry, in particular to a switched reluctance motor speed regulating system for a punch and a control method.
Background
The press is a typical periodically varying load device, and a complete production cycle includes: the method comprises the steps of mold locking, stamping, mold opening and the like, wherein in one production cycle, the stamping machine is in the stamping stage for a very short time, and the other stages of mold locking, mold opening, waiting and the like are all in the most time; meanwhile, the punching machine is in a loaded state only in the punching stage, and other stages are in an idle state or a near idle state; the punching machine is generally driven by an asynchronous motor, the asynchronous motor runs at a constant speed of 50HZ at full speed in the whole working process, the load of the asynchronous motor is large only in the punching stage of the punching machine tool in one production period, the load of the asynchronous motor is very small in other working stages, particularly in the idle process, the load is almost zero, the idle current of the asynchronous motor can reach more than 20% of rated current, the electric energy consumption of the asynchronous motor is serious in the whole working process of the machine tool, and the electric energy utilization rate is only 25% -70%; when an asynchronous motor running at a constant speed of 50HZ at full speed is started, a direct starting mode is generally adopted, the starting current is 5-8 times of the rated current, and the impact on a power grid is large.
Aiming at the transformation of a punch press which adopts full-speed 50HZ constant-speed operation, the prior proposal mainly adopts an inverter on the basis of an asynchronous motor, and reduces the speed of the asynchronous motor through the inverter when in no-load so as to achieve the aim of saving energy, but the speed regulation range of the inverter is very narrow, the speed reduction range is limited, although a part of electric energy can be saved through speed regulation, the electricity is saved, and meanwhile, the current of the asynchronous motor is still very large under the low-speed no-load state, the current can reach about 15 percent of rated current, the energy consumption is still very high, and the mode of adding the inverter still does not fundamentally solve the problem of high energy consumption of the traditional punch press.
According to the field application scene of the punching machine, the optimal energy-saving state of the punching machine is that under the condition of no load, the rotating speed is regulated to be extremely low or stopped, and the rotating speed is instantaneously increased to the rated rotating speed of punching during punching, the time is generally counted in milliseconds, the motor is required to have extremely strong instantaneous starting capacity, the time from the starting of the frequency converter and the asynchronous motor to the rated rotating speed is generally more than 1 second, and obviously the requirement cannot be met.
Disclosure of Invention
The application aims to solve the technical problem of providing a switch reluctance motor speed regulating system for a punch press, which solves the problems of high energy consumption and large impact on a power grid of the traditional asynchronous motor adopted by the punch press; the problem that the energy consumption of the traditional punching machine is high cannot be fundamentally solved by a mode of adding the frequency converter; the problem of poor starting acceleration capacity of the asynchronous motor is solved; meanwhile, the multi-stage speed control is adopted, so that the overall efficiency of the punching machine is improved, the whole system works in an optimal running state, and the economy is high.
In order to solve the technical problems, the application adopts the following technical scheme:
a speed regulating system of a switched reluctance motor for a punch press comprises a switched reluctance motor controller, a switched reluctance motor, a punch press controller, an encoder, a breaker QF and a travel switch SQ 1 Travel switch SQ 2 Load key SB 1 Start-stop switch K 1 A slider;
the switch reluctance motor controller is electrically connected with the switch reluctance motor through six cables U1, U2, V1, V2, W1 and W2 to drive the switch reluctance motor to operate;
the switch reluctance motor is mechanically connected with the punch press and used for driving the punch press to work;
the punching machine is used for blanking, punching, forming, deep drawing, trimming, fine punching, shaping, riveting and extruding the plates through a die;
input ends SZ, XZ and LD of the punch controller and a travel switch SQ 1 Travel switch SQ 2 Load key SB 1 The output ends C0, C1 and C2 of the punch controller are electrically connected with the multi-speed input ends S0, S1 and S2 of the switch reluctance motor controller, and the punch controller receives the travel switch SQ 1 Travel switch SQ 2 Load key SB 1 Then the generated multi-segment speed signal controls the switch reluctance motor to run at different speeds, and the control signal CTL output by the punch controller is used for controlling the sliding of the punchRunning blocks;
the encoder detects the encoding information of the switch reluctance motor, and then the speed of the switch reluctance motor can be obtained;
the circuit breaker QF is electrically connected with the switch reluctance motor controller, and the switch reluctance motor controller conducts electricity after being closed;
the travel switch SQ 1 The upper dead center is used for detecting the running of the sliding block of the punch press;
the travel switch SQ 2 The lower dead point is used for detecting the running of the sliding block of the punch press;
the loading key SB 1 After being pressed down, the sliding block of the punch starts to move from the upper dead point to the lower dead point and returns to the upper dead point;
the start-stop switch K 1 The control device is used for controlling the start and stop of the switch reluctance motor;
the sliding block is movably connected with the punch.
Further, the switch reluctance motor controller consists of a rectifier, a power converter, a direct-current voltage sampling circuit, a driving circuit, a load voltage and current sampling circuit and a main control board, wherein the main control board is connected with the power converter for driving the switch reluctance motor to operate through the driving circuit; the main control board is also respectively connected with a direct-current voltage sampling circuit, a load voltage and current sampling circuit, an encoder and a control signal; after the main control board collects the coding information of the coder, the rotating speed and the position of the rotor of the switch reluctance motor are calculated; the direct-current voltage sampling circuit collects bus voltage; the load voltage and current sampling circuit collects load voltage and current; the control signal is electrically connected with the main control board and is used for controlling the operation of the system.
Further, the control signal is formed by a breaker QF and a start-stop switch K 1 And input signals R, S, T, F/S, S0, S1 and S2 of the punch controller.
Further, the punch controller adopts one of a programmable logic controller PLC, a digital controller (ARM, MCU, DSP is a main control chip) and a combined controller of the programmable logic controller PLC and the digital controller.
The control method of the switch reluctance motor speed regulating system for the punch press comprises the following steps:
s101, closing a breaker QF, and switching on a power supply of a switched reluctance motor controller;
s102, the punch controller sets a starting multi-segment speed signal S2S1S0=001, namely multi-segment speed 1;
s103, setting the idle rotation speed of the operation of the switched reluctance motor as V by the switched reluctance motor controller 1 The stamping rotating speed is V 2 The return rotation speed is V 3 Wherein V is 1 ≥0 r/min,V 2 ≥V 3 ＞V 1， V 1 Corresponding to multi-stage speed 1, V 2 Corresponding to multi-stage speed 2, V 3 Corresponding to a multi-section speed 3;
s104, the switched reluctance motor controller detects s2s1s0=001, and sets the running speed of the switched reluctance motor to be multi-speed 1, i.e. no-load speed V 1 ；
S105, setting the stroke of a sliding block of the punch from a top dead center to a bottom dead center to be L, and setting the punching time to be T 1 The return time is T 2 ；
S106, judging start-stop switch K 1 Is it closed? If yes, then execute S107;
s107, closing the start-stop switch K 1 Starting the switch reluctance motor, and the switch reluctance motor refers to the idle rotation speed V 1 The soft start operation is carried out by taking the reference as the standard, when the rotating speed V is reached 1 When the punching machine is in an idle state, the switch reluctance motor drives the punching machine to work;
s108, pressing the loading key SB 1 The punch controller detects the loading key SB 1 After being pressed down, the sliding block of the control punch starts to run from the upper dead point to the lower dead point, and the multi-segment speed signal is changed into S2S1S0=010, namely, the multi-segment speed is 2;
s109, the punch controller controls the sliding block of the punch to start to run from the top dead center to the bottom dead center, and the rotating speed of the switch reluctance motor is from V 1 Accelerating to V 2 Acceleration time t 1 The acceleration time satisfies t 1 ＜T 1 At t 1 The downward running distance of the sliding block of the punch press at moment is L 1 ，L 1 ＜L；
S110. the switched reluctance motor controller detects s2s1s0=010, will be turned onThe operation speed of the switched reluctance motor is set as the punching speed V 2 The rotating speed of the switch reluctance motor is V 1 Accelerating to V 2 Acceleration time t 1 The acceleration time satisfies t 1 ＜T 1 At t 1 The downward running distance of the sliding block of the punch press (3) at the moment is L 1 ，L 1 ＜L；
S111, rotating speed of switch reluctance motor is from V 1 Accelerating to the punching rotation speed V 2 After that, the slide block of the punch begins to punch the workpiece, and when the slide block reaches the bottom dead center, the punching is completed, and the travel switch SQ 2 Closing;
s112, detecting a travel switch SQ by the punch controller 2 After closing, controlling the sliding block of the punch to start to run from the bottom dead center to the top dead center, and changing the multi-segment speed signal into S2S1S0=100, namely, multi-segment speed 3;
s113, detecting S by the switched reluctance motor controller 2 S 1 S 0 Let the operating speed of the switched reluctance motor be the return speed V =100 3 The rotating speed of the switch reluctance motor is V 2 Decelerating to V 3 Time of deceleration t 2 The deceleration time satisfies t 2 ≤T 2 At t 2 The upward running distance of the sliding block of the punch press at moment is L 2 ，L 2 ≤L；
S114, when the sliding block of the punch moves to the upper dead point, the travel switch SQ 1 Closing;
s115, detecting a travel switch SQ by the punch controller 1 After closing, the multi-segment speed signal is changed to s2s1s0=001;
s116, the switched reluctance motor controller detects s2s1s0=001, and sets the running rotation speed of the switched reluctance motor to be a multi-speed V 1 The rotating speed of the switch reluctance motor is V 3 Decelerating to V 1 ；
S117, judging start-stop switch K 1 Is it disconnected? If yes, S118 is performed, and if no, S108 is performed;
s118, the switch reluctance motor stops running, the punch stops working, and then S106 is executed.
Further, when the rotating speed of the multi-stage speed 1 is V 1 When=0 r/min, the punch 3 is in idle stateThe switched reluctance motor 2 is not operated, in which state the switch K is turned on and off 1 10 can be removed by loading the key SB 1 9 for controlling the start of the switched reluctance motor 2 by means of a travel switch SQ 1 7 to control the stopping of the switched reluctance motor 2.
Compared with the prior art, the application has the beneficial effects that:
1. the application adopts the switch reluctance motor to drive the punch press, the switch reluctance motor has the characteristics of small starting current and large starting torque, when the starting current is 30%, 150% of starting torque can be output, meanwhile, the switch reluctance motor has excellent soft starting performance, the soft starting current is adjusted by setting the soft starting time, the huge impact on mechanical parts and a power grid when the punch press is started is completely eliminated, and the service life of parts of a machine tool can be effectively prolonged; meanwhile, the no-load current of the switch reluctance motor is only 0.02-0.03 times of the rated current, the no-load current is extremely small, and compared with the traditional asynchronous motor, the no-load power saving rate is high.
2. When the punching machine is in idle load, the idle load rotating speed is controlled to be in an extremely low or stop state, and when the punching machine is in punching, the rotating speed is instantaneously increased to the rated rotating speed of the punching machine through the strong starting accelerating capacity of the switched reluctance motor, so that the energy consumption of the punching machine is greatly saved.
3. The application adopts multistage speed control to the production period of the punch press, adopts the rated rotation speed of the punch press during punching, the return rotation speed can be set to be equal to or lower than the rated rotation speed according to the on-site working condition, the idle rotation speed can be set to be low or zero rotation speed according to the on-site working condition, the energy consumption of each link of the punch press is reduced to the minimum, the whole system works in the optimal running state, and the economy is strong.
Drawings
Fig. 1 is a system block diagram of a switched reluctance motor speed regulating system for a punch press according to an embodiment of the application.
Fig. 2 is a diagram illustrating a structure of a switched reluctance motor controller according to an embodiment of the present application.
FIG. 3 is a flow chart of a control method of the speed regulating system of the switch reluctance motor for the punching machine.
Reference numerals in the drawings and their corresponding names: 1. switched reluctance motor controller 2, switched reluctance motor 3, punch press 4, punch press controller 5, encoder 6, breaker QF,7, travel switch SQ 1 8, travel switch SQ 2 9, load button SB 1 10, start-stop switch K 1 11 parts of a rectifier, 12 parts of a power converter, 13 parts of a direct-current voltage sampling circuit, 14 parts of a driving circuit, 15 parts of a load voltage current sampling circuit, 16 parts of a control signal, 17 parts of a main control board, 31 parts of a sliding block.
Description of the embodiments
The application will be described in further detail with reference to the drawings and the detailed description.
As shown in FIG. 1, the speed regulating system of the switch reluctance motor for the punch press comprises a switch reluctance motor controller 1, a switch reluctance motor 2, a punch press 3, a punch press controller 4, an encoder 5, a breaker QF 6 and a travel switch SQ 1 7. Travel switch SQ 2 8. Loading key SB 1 9. Start-stop switch K 1 10 and a slider 31;
the switch reluctance motor controller 1 is electrically connected with the switch reluctance motor 2 through six cables U1, U2, V1, V2, W1 and W2, and drives the switch reluctance motor 2 to operate;
the switch reluctance motor 2 is mechanically connected with the punch 3 and is used for driving the punch 3 to work;
the punch 3 is used for blanking, punching, forming, deep drawing, trimming, fine punching, shaping, riveting and extruding the plate through a die;
input ends SZ, XZ and LD of the punch controller 4 and a travel switch SQ 1 7. Travel switch SQ 2 8. Loading key SB 1 9 are electrically connected, the output ends C0, C1 and C2 of the punch controller 4 are electrically connected with the multi-speed input ends S0, S1 and S2 of the switched reluctance motor controller 1, and the punch controller 4 receives the travel switch SQ 1 7. Travel switch SQ 2 8. Loading key SB 1 9, then generating a rear multi-speed signal to control the switch reluctance motor 2 to run at different speeds, wherein a control signal CTL output by the punch controller 4 is used for controlling a slide block 31 of the punch 3 to run;
the encoder 5 detects the encoding information of the switch reluctance motor 2, and then the speed of the switch reluctance motor 2 can be obtained;
the circuit breaker QF 6 is electrically connected with the switch reluctance motor controller 1, and the switch reluctance motor controller 1 conducts electricity after being closed;
the travel switch SQ 1 7 is used for detecting the upper dead point of the running of the sliding block 31 of the punch press 3;
the travel switch SQ 2 8 is used for detecting the bottom dead center of the running of the sliding block 31 of the punch press 3;
the loading key SB 1 After 9 is pressed down, the sliding block 31 of the punch 3 starts to move from the upper dead point to the lower dead point and returns to the upper dead point;
the start-stop switch K 1 10 is used for controlling the start and stop of the switch reluctance motor 2;
the sliding block 31 is movably connected with the punch 3.
Further, the switched reluctance motor controller 1 is electrically connected with the encoder 5 through 111-115 shielding wires, wherein the shielding wires comprise encoding signal wires and power wires.
Further, the control signal 17 is composed of a breaker QF 6 and a start-stop switch K 1 10 and input signals R, S, T, F/S, S0, S1 and S2 of the punch controller 4.
Further, the punch controller 4 adopts one of a programmable logic controller PLC, a digital controller (ARM, MCU, DSP is a main control chip) and a combination controller of the programmable logic controller PLC and the digital controller.
As shown in fig. 2, in the present application, a switched reluctance motor controller 1 is composed of a rectifier 11, a power converter 12, a dc voltage sampling circuit 13, a driving circuit 14, a load voltage current sampling circuit 15 and a main control board 17, wherein the main control board 17 is connected with the power converter 12 for driving the switched reluctance motor 2 to operate through the driving circuit 14; the main control board 17 is also respectively connected with a direct-current voltage sampling circuit 13, a load voltage and current sampling circuit 15, an encoder 5 and a control signal 16; after the main control board 17 collects the coding information of the encoder 5, the rotating speed and the position of the rotor of the switch reluctance motor are calculated; the DC voltage sampling circuit 13 collects bus voltage; the load voltage and current sampling circuit 15 collects load voltage and current; the control signal 16 is electrically connected to a main control board 17 for controlling the operation of the system.
Further, the main control board 17 controls the power converter 12 through the driving circuit 14 for driving the switched reluctance motor 2 to operate, the main control board 17 collects bus voltage and load voltage and current through the direct-current voltage sampling circuit 13 and the load voltage and current sampling circuit 15 for voltage and current closed-loop control, and the main control board 17 collects the rotating speed of the switched reluctance motor 2 through the encoder 5 for closed-loop adjusting the rotating speed of the switched reluctance motor 2.
Fig. 3 is a control process of a speed regulating system of a switched reluctance motor for a punch press, which specifically includes the following steps:
s101, closing a breaker QF 6, and switching on a power supply of the switched reluctance motor controller 1;
s102, the punch controller 4 sets a start multi-segment speed signal s2s1s0=001, i.e. multi-segment speed 1;
s103, the switch reluctance motor controller 1 sets the idle rotation speed of the switch reluctance motor 2 to be V 1 The stamping rotating speed is V 2 The return rotation speed is V 3 Wherein V is 1 ≥0 r/min,V 2 ≥V 3 ＞V 1， V 1 Corresponding to multi-stage speed 1, V 2 Corresponding to multi-stage speed 2, V 3 Corresponding to a multi-section speed 3;
s104, the switched reluctance motor controller 1 detects s2s1s0=001, and sets the running speed of the switched reluctance motor 2 to be multiple speed 1, i.e. no-load speed V 1 ；
S105, setting the stroke of the slide block 31 of the punch 3 from the top dead center to the bottom dead center as L and the punching time as T 1 The return time is T 2 ；
S106, judging start-stop switch K 1 Is 10 closed? If yes, then execute S107;
s107, closing the start-stop switch K 1 10, starting the switched reluctance motor 2, the switched reluctance motor 2 referencing the no-load rotation speed V 1 The soft start operation is carried out by taking the reference as the standard, when the rotating speed V is reached 1 When the punching machine 3 is in an idle state, the switch reluctance motor 2 drives the punching machine to work;
S108、pressing the load key SB 1 9, the punch controller 4 detects the loading key SB 1 After 9 is pressed down, the slide block 31 of the punch 3 is controlled to start to run from the top dead center to the bottom dead center, and the multi-segment speed signal is changed into s2s1s0=010, namely, the multi-segment speed 2;
s109, the punch controller 4 controls the sliding block 31 of the punch 3 to start to run from the top dead center to the bottom dead center, and the rotating speed of the switch reluctance motor is from V 1 Accelerating to V 2 Acceleration time t 1 The acceleration time satisfies t 1 ＜T 1 At t 1 The downward running distance of the slide block 31 of the punch 3 at the moment is L 1 ，L 1 ＜L；
S110. when the switched reluctance motor controller 1 detects s2s1s0=010, the operation rotation speed of the switched reluctance motor 2 is set to the punching rotation speed V 2 The rotating speed of the switch reluctance motor is V 1 Accelerating to V 2 Acceleration time t 1 The acceleration time satisfies t 1 ＜T 1 At t 1 The downward running distance of the slide block 31 of the punch 3 at the moment is L 1 ，L 1 ＜L；
S111, rotating speed of switch reluctance motor is from V 1 Accelerating to the punching rotation speed V 2 After that, the slide block 31 of the punch 3 starts to punch the workpiece, and when the slide block 31 reaches the bottom dead center, the punching is completed, and the travel switch SQ 2 8, closing;
s112, detecting a travel switch SQ by the punch controller 4 2 8, after closing, controlling the sliding block 31 of the punch press 3 to start to run from the bottom dead center to the top dead center, and changing the multi-segment speed signal into s2s1s0=100, namely, multi-segment speed 3;
s113, S is detected by the switched reluctance motor controller 1 2 S 1 S 0 Let the operating speed of the switched reluctance motor 2 be the return speed V =100 3 The rotating speed of the switch reluctance motor is V 2 Decelerating to V 3 Time of deceleration t 2 The deceleration time satisfies t 2 ≤T 2 At t 2 The upward running distance of the slide block 31 of the punch 3 at the moment is L 2 ，L 2 ≤L；
S114, when the slide block 31 of the punch 3 moves to the upper dead point, the travel switch SQ 1 7, closing;
s115, punch pressThe controller 4 detects the travel switch SQ 1 7, after closing, changing the multi-speed signal into s2s1s0=001;
s116, the switched reluctance motor controller 1 detects s2s1s0=001, and sets the operation rotation speed of the switched reluctance motor 2 to the multi-stage speed V 1 The rotating speed of the switch reluctance motor is V 3 Decelerating to V 1 ；
S117, judging start-stop switch K 1 Is 10 disconnected? If yes, S118 is performed, and if no, S108 is performed;
s118, the switch reluctance motor 2 stops running, the punch press 3 stops working, and then S106 is executed.
Further, when the rotating speed of the multi-stage speed 1 is V 1 When=0 r/min, the switch reluctance motor 2 is not operated in the no-load state of the punch press 3, and in this state, the switch K is turned on and off 1 10 can be removed by loading the key SB 1 9 for controlling the start of the switched reluctance motor 2 by means of a travel switch SQ 1 7 to control the stopping of the switched reluctance motor 2.
It should be noted that, herein, the multi-segment speed signal "S2S1S0" may be encoded with any encoding "multi-segment speed 1, multi-segment speed 2, multi-segment speed 3", and is not limited to "001, 010, 100"; through a loading key SB1, a start-stop switch K1 and a travel switch SQ 1 Travel switch SQ 2 The method for controlling the loading of the punching machine, the detection of the starting and stopping of the switched reluctance motor, the detection of the upper dead point and the lower dead point are only one implementation form of the method, and the method for controlling the loading of the punching machine, the detection of the starting and stopping of the switched reluctance motor, the detection of the upper dead point and the detection of the lower dead point by adopting other modes are still within the scope of the technical scheme of the application; the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of a process, method, article, or the like that includes the element,Additional identical elements may be present in an article or apparatus.
Of course, the above description is not limited to the above examples, and the technical features of the present application that are not described may be implemented by or by using the prior art, which is not described herein again; the above examples and drawings are only for illustrating the technical aspects of the present application and are not intended to limit the present application, but the present application has been described in detail with reference to the preferred embodiments only, and it should be understood by those skilled in the art that the changes, modifications, additions or substitutions made by those skilled in the art without departing from the spirit of the present application and the scope of the claims of the present application.
Claims (6)
1. A switched reluctance motor speed regulation system for a punch press is characterized in that: comprises a switch reluctance motor controller (1), a switch reluctance motor (2), a punch press (3), a punch press controller (4), an encoder (5), a breaker QF (6) and a travel switch SQ 1 (7) Travel switch SQ 2 (8) Load key SB 1 (9) Start-stop switch K 1 (10) A slider (31);
the switch reluctance motor controller (1) is electrically connected with the switch reluctance motor (2) through six cables U1, U2, V1, V2, W1 and W2, and drives the switch reluctance motor (2) to operate;
the switch reluctance motor (2) is mechanically connected with the punch (3) and is used for driving the punch (3) to work;
the punch (3) is used for blanking, punching, forming, deep drawing, trimming, fine punching, shaping, riveting and extruding the plates through a die;
input ends SZ, XZ and LD of the punch controller (4) and a travel switch SQ 1 (7) Travel switch SQ 2 (8) Load key SB 1 (9) The output ends C0, C1 and C2 of the punch controller (4) are electrically connected with the multi-speed input ends S0, S1 and S2 of the switched reluctance motor controller (1), and the punch controller (4) receives the travel switch SQ 1 (7) Travel distanceSwitch SQ 2 (8) Load key SB 1 (9) Then the generated multi-stage speed signal controls the switch reluctance motor (2) to run at different speeds, and the control signal CTL output by the punch controller (4) is used for controlling the sliding block (31) of the punch (3) to run;
the encoder (5) detects the encoding information of the switch reluctance motor (2), and then the speed of the switch reluctance motor (2) can be obtained;
the circuit breaker QF (6) is electrically connected with the switch reluctance motor controller (1), and the switch reluctance motor controller (1) conducts electricity after being closed;
the travel switch SQ 1 (7) The upper dead point is used for detecting the running of the sliding block (31) of the punch press (3);
the travel switch SQ 2 (8) A bottom dead center for detecting the running of a sliding block (31) of the punch press (3);
the loading key SB 1 (9) After being pressed down, a sliding block (31) of the punch (3) starts to move from a top dead center to a bottom dead center and returns to the top dead center;
the start-stop switch K 1 (10) The control device is used for controlling the start and stop of the switch reluctance motor (2);
the sliding block (31) is movably connected with the punch (3).
2. The switched reluctance motor speed regulation system for the punch press according to claim 1, wherein: the switched reluctance motor controller (1) consists of a rectifier (11), a power converter (12), a direct-current voltage sampling circuit (13), a driving circuit (14), a load voltage current sampling circuit (15) and a main control board (17), wherein the main control board (17) is connected with the power converter (12) for driving the switched reluctance motor (2) to operate through the driving circuit (14); the main control board (17) is also respectively connected with a direct-current voltage sampling circuit (13), a load voltage and current sampling circuit (15), an encoder (5) and a control signal (16); after the main control board (17) collects the coding information of the coder (5), the rotating speed and the position of the rotor of the switch reluctance motor are calculated; a direct-current voltage sampling circuit (13) collects bus voltage; a load voltage and current sampling circuit (15) collects load voltage and current; the control signal (16) is electrically connected with the main control board (17) and is used for controlling the operation of the system.
3. The switched reluctance motor speed regulation system for the punch press according to claim 2, wherein: the control signal (17) is composed of a breaker QF (6) and a start-stop switch K 1 (10) And input signals R, S, T, F/S, S0, S1 and S2 of the punch controller (4).
4. The system for regulating speed of switched reluctance motor for punch press according to claim 1, wherein the punch press controller (4) is one of a programmable logic controller PLC, a digital controller (ARM, MCU, DSP is a main control chip) and a combination controller of the programmable logic controller PLC and the digital controller.
5. The control method of the switched reluctance motor speed regulating system for the punch press according to claim 1, wherein the control method comprises the following steps: the method comprises the following steps:
s101, closing a breaker QF (6), and switching on a power supply of a switched reluctance motor controller (1);
s102, a punching machine controller (4) sets a starting multi-segment speed signal S2S1S0=001, namely multi-segment speed 1;
s103, the switch reluctance motor controller (1) sets the idle rotation speed of the switch reluctance motor (2) to be V 1 The stamping rotating speed is V 2 The return rotation speed is V 3 Wherein V is 1 ≥0 r/min,V 2 ≥V 3 ＞V 1， V 1 Corresponding to multi-stage speed 1, V 2 Corresponding to multi-stage speed 2, V 3 Corresponding to a multi-section speed 3;
s104, the switched reluctance motor controller (1) detects that S2S1S0=001, and the running rotating speed of the switched reluctance motor (2) is set to be a multi-stage speed 1, namely an idle rotating speed V 1 ；
S105, setting the stroke of the sliding block (31) of the punch press (3) from the upper dead point to the lower dead point to be L, and punchingThe pressing time is T 1 The return time is T 2 ；
S106, judging start-stop switch K 1 (10) Is it closed? If yes, then execute S107;
s107, closing the start-stop switch K 1 (10) Starting the switched reluctance motor (2), the switched reluctance motor (2) referencing the idle speed V 1 The soft start operation is carried out by taking the reference as the standard, when the rotating speed V is reached 1 When the punching machine (3) is in an idle state, the switch reluctance motor (2) drives the punching machine to work;
s108, pressing the loading key SB 1 (9) The punch controller (4) detects the loading key SB 1 (9) After being pressed down, a sliding block (31) of the control punch press (3) starts to run from a top dead center to a bottom dead center, and the multi-stage speed signal is changed into S2S1S0=010, namely, the multi-stage speed is 2;
s109, the punch controller (4) controls the sliding block (31) of the punch (3) to start to run from the top dead center to the bottom dead center, and the rotating speed of the switch reluctance motor is from V 1 Accelerating to V 2 Acceleration time t 1 The acceleration time satisfies t 1 ＜T 1 At t 1 The downward running distance of the sliding block (31) of the punch press (3) at the moment is L 1 ，L 1 ＜L；
S110. when the switched reluctance motor controller (1) detects s2s1s0=010, the operation rotation speed of the switched reluctance motor (2) is set as the punching rotation speed V 2 The rotating speed of the switch reluctance motor is V 1 Accelerating to V 2 Acceleration time t 1 The acceleration time satisfies t 1 ＜T 1 At t 1 The downward running distance of the sliding block (31) of the punch press (3) at the moment is L 1 ，L 1 ＜L；
S111, rotating speed of switch reluctance motor is from V 1 Accelerating to the punching rotation speed V 2 After that, the slide block (31) of the punch press (3) starts to punch the workpiece, and when the slide block (31) punches to reach the bottom dead center, the punching is completed, and the travel switch SQ 2 (8) Closing;
s112, detecting a travel switch SQ by the punch controller (4) 2 (8) After closing, the slide block (31) of the control punch (3) starts to move from the bottom dead center to the bottom dead centerThe top dead center runs, and the multi-speed signal is changed into S2S1S0=100, namely, the multi-speed signal is changed into a multi-speed signal 3;
s113, the switched reluctance motor controller (1) detects S 2 S 1 S 0 Let the operating speed of the switched reluctance motor (2) be the return speed V =100 3 The rotating speed of the switch reluctance motor is V 2 Decelerating to V 3 Time of deceleration t 2 The deceleration time satisfies t 2 ≤T 2 At t 2 The upward running distance of the sliding block (31) of the punch press (3) at the moment is L 2 ，L 2 ≤L；
S114, when the sliding block (31) of the punch (3) moves to the upper dead point, the travel switch SQ 1 (7) Closing;
s115, detecting a travel switch SQ by the punch controller (4) 1 (7) After closing, the multi-segment speed signal is changed to s2s1s0=001;
s116, when the switched reluctance motor controller (1) detects that S2S1S0=001, the running rotation speed of the switched reluctance motor (2) is set to be a multi-stage speed V 1 The rotating speed of the switch reluctance motor is V 3 Decelerating to V 1 ；
S117, judging start-stop switch K 1 (10) Is it disconnected? If yes, S118 is performed, and if no, S108 is performed;
s118, the switch reluctance motor (2) stops running, the punch press (3) stops working, and then S106 is executed.
6. The control method of the switched reluctance motor speed regulating system for the punch press according to claim 5, wherein the control method comprises the following steps: when the rotating speed of the multi-stage speed 1 is V 1 When=0 r/min, the switch reluctance motor (2) of the punch (3) is not operated in the idle state, and the switch K is turned on and off in the idle state 1 (10) Can be removed by loading key SB 1 (9) To control the start of the switched reluctance motor (2) by means of a travel switch SQ 1 (7) To control the stopping of the switched reluctance motor 2.
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| CN104578606A (en) * | 2015-01-26 | 2015-04-29 | 聊城职业技术学院 | Switch reluctance motor capable of adjusting rated speed |
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| CN111111902A (en) * | 2020-02-25 | 2020-05-08 | 四川署信驱动科技有限公司 | Switched reluctance motor speed regulating system for ceramic ball mill |
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| CN104578606A (en) * | 2015-01-26 | 2015-04-29 | 聊城职业技术学院 | Switch reluctance motor capable of adjusting rated speed |
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