CN104485862A - SCR power expansion control system of direct current motor - Google Patents
SCR power expansion control system of direct current motor Download PDFInfo
- Publication number
- CN104485862A CN104485862A CN201410807214.XA CN201410807214A CN104485862A CN 104485862 A CN104485862 A CN 104485862A CN 201410807214 A CN201410807214 A CN 201410807214A CN 104485862 A CN104485862 A CN 104485862A
- Authority
- CN
- China
- Prior art keywords
- power
- thyristor
- scr
- input end
- module
- 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
Links
Abstract
The invention discloses an SCR power expansion control system of a direct current motor. The SCR power expansion control system comprises a signal synchronization module, a pulse amplification module, an SCR power component, a PLC processing module and a speed regulation power supply board, wherein the three-phase input end of the SCR power component is respectively connected with an input port of a three-phase power supply, the direct current output end of the SCR power component is connected with the direct current motor, and the control end of the SCR power component is connected with the output end of the pulse amplification module through a temperature switch; the input end of the pulse amplification module is connected with the output end of the speed reduction power supply board, and the input end of the speed reduction power supply board is connected with the trigger pulse output end of the PLC processing module; the PLC processing module is connected with a current acquisition module through a fuse switch group, the synchronous acquisition end of the PLC processing module is connected with the synchronous voltage output end of the signal synchronization module, and the synchronous voltage input end of the signal synchronization module is connected with the direct current output end of the SCR power component through a temperature switch group. The SCR power expansion control system disclosed by the invention has the benefits that the performance is stable and reliable, and the high-power control can be realized.
Description
Technical field
The present invention relates to DC motor control system field, particularly relate to direct current machine SCR power expansion control system.
Background technology
DC speed regulator is the equipment regulating direct current drive motor speed, because DC motor has slow-speed of revolution high-torque, is that alternating current motor cannot replace, and therefore regulate the equipment of direct current drive motor speed, DC speed regulator has the wide application world; It mainly contains following application characteristic: have wider speed adjustable range; There is dynamic response process faster; The transitional processes of automatic smoothing is needed during acceleration, deceleration; During low-speed running, moment is large; Can by overload current volitional check on setting electric current.
In drilling technology, adopt slush pump in entirely automatically controlled system, rotating disk, winches etc. all have employed high power DC speed regulating device, its feature is, in drilling process, slush pump, rotating disk, winch in process of production, the single quadrant operational mode mainly adopted, therefore rate request is not just so strict with, control simple and convenient, do not need strict principal and subordinate's sharing of load and the requirement of control precision, thus the third-party micro-processing and control element (PCE) of very applicable employing, Novel pulse amplification board and signal synchronous plate is coordinated to control independently (PCC) power, therefore manufacturing equipment cost declines greatly, reduce complete sets of equipment cost benefit space and have also been obtained effective lifting.
Direct current thyristor speed control system, due to the voltage of DC motor, the coupling of electric current and magnetic flux is more weak, DC motor is made to have good runnability and control characteristic, can stepless speed control on a large scale, start, braking ability is good, require raised, brake torque, in the electric drive field of quick response and wider speed adjustable range, adopt DC motor as the actuating motor of governing system, because DC motor has good mechanical property and governor control characteristics, smooth speed control, convenient, be easy to smoothing speed governing on a large scale, overload capacity is larger, impact load frequently can be born, stepless fast braking and reversion can be realized, industrial processes can be met.
Digital speed-control system based on microprocessor, namely develops to analog-and digital-Hybrid mode from the analogue enlargement in past, finally realizes total digitalization.Digitlization governing system refers to computer processor replacement simulation speed regulator in the past, it has the advantages such as volume is little, realization is convenient, be not only general PID to control, be exactly complicated vector control, digitlization governing system realized system speed regulating control by digitial controller and digital trigger, thus reach control precision and the requirement of expection, make various new control strategy and control method accomplished.
In order to solve above-mentioned deficiency of the prior art, the present invention proposes a kind of new solution.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide direct current machine SCR power expansion control system, this SCR power expansion control system is stable and reliable for performance, can realize high-power control.
The object of the invention is to be achieved through the following technical solutions: direct current machine SCR power expansion control system, it comprises signal synchronization module, pulse amplifying module, SCR (PCC) power, PLC processing module and speed governing power source plate.
The three-phase input end of described SCR (PCC) power is connected with three three-phase power input end mouths respectively, the DC output end of SCR (PCC) power is connected with the direct-flow input end mouth of direct current machine, and the control end of SCR (PCC) power is connected with the trigger impulse output of pulse amplifying module by temperature switch group.
The trigger impulse input of described pulse amplifying module is connected with the trigger impulse output of speed governing power source plate, and the trigger impulse input of speed governing power source plate is connected with the trigger impulse output of PLC processing module.
The current acquisition end of described PLC processing module passes through the input current of current acquisition module acquires three-phase power input end mouth, PLC processing module is by fuse cutout group and current acquisition model calling, the three-phase synchronous voltage acquisition end of PLC processing module is connected with the three-phase synchronous voltage output end of signal synchronization module respectively, and the three-phase synchronous voltage input end of signal synchronization module is connected by the three-phase input end of temperature switch group with SCR (PCC) power.
The direct voltage collection terminal of described PLC processing module is connected with the DC voltage output end of signal synchronization module, and the DC voltage input end of signal synchronization module is connected by the DC output end of temperature switch group with SCR (PCC) power.
It also comprises multiple fast acting fuse, and the input of described multiple fast acting fuses is connected with three-phase power input end mouth respectively, and the output of multiple fast acting fuse is connected with the three-phase input end of SCR (PCC) power respectively.
Described fuse cutout group is the dry contact passive switch supporting with fast acting fuse, is composed in parallel by the linked switch of multiple fast acting fuse.
It also comprises multiple temperature sensor and radiator, and each temperature sensor is all connected with a radiator, and radiator is arranged on the multiple thyristor places in SCR (PCC) power respectively, and the output of temperature sensor is connected with the control end of temperature switch group.
Described temperature switch group is the temperature detection dry contact passive switch supporting with temperature sensor, is composed in series by the linked switch of multiple temperature sensor.
It also comprises velocity transducer, and the input of described velocity transducer gathers the rotating speed of direct current machine, and the output of velocity transducer is connected with the rotating speed input of PLC processing module.
Described fast acting fuse comprises fast acting fuse RS1 ~ RS6.
Described SCR (PCC) power is three-phase fully-controlled bridge circuit, comprises three groups of power models.
Wherein, first power model comprises thyristor VT1, thyristor VT4, a RC resistance capaciting absorpting circuit and the 4th RC resistance capaciting absorpting circuit, the anode of described thyristor VT1 is held with the U of three-phase power input end mouth by fast acting fuse RS2 and is connected, the negative electrode of thyristor VT1 is connected with the positive pole of direct-flow input end mouth, between the anode that a RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT1 and negative electrode.
The negative electrode of thyristor VT4 is held with the U of three-phase power input end mouth by fast acting fuse RS1 and is connected, the anode of thyristor VT4 is connected with the negative pole of direct-flow input end mouth, between the negative electrode that 4th RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT1 and anode, one RC resistance capaciting absorpting circuit is made up of the electric capacity GC1 connected and resistance GR1, and the 4th RC resistance capaciting absorpting circuit is made up of the electric capacity GC4 connected and resistance GR4.
Second power model comprises thyristor VT3, thyristor VT6, the 3rd RC resistance capaciting absorpting circuit and the 6th RC resistance capaciting absorpting circuit, the anode of described thyristor VT3 is held with the V of three-phase power input end mouth by fast acting fuse RS4 and is connected, the negative electrode of thyristor VT3 is connected with the positive pole of direct-flow input end mouth, between the anode that the 3rd RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT3 and negative electrode.
The negative electrode of thyristor VT6 is held with the V of three-phase power input end mouth by fast acting fuse RS3 and is connected, the anode of thyristor VT6 is connected with the negative pole of direct-flow input end mouth, between the negative electrode that 6th RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT6 and anode, 3rd RC resistance capaciting absorpting circuit is made up of the electric capacity GC3 connected and resistance GR3, and the 6th RC resistance capaciting absorpting circuit is made up of the electric capacity GC6 connected and resistance GR6.
3rd power model comprises thyristor VT5, thyristor VT2, the 5th RC resistance capaciting absorpting circuit and the 2nd RC resistance capaciting absorpting circuit, the anode of described thyristor VT5 is held with the W of three-phase power input end mouth by fast acting fuse RS6 and is connected, the negative electrode of thyristor VT5 is connected with the positive pole of direct-flow input end mouth, between the anode that the 5th RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT5 and negative electrode.
The negative electrode of thyristor VT2 is held with the W of three-phase power input end mouth by fast acting fuse RS5 and is connected, the anode of thyristor VT2 is connected with the negative pole of direct-flow input end mouth, between the negative electrode that 2nd RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT2 and anode, 5th RC resistance capaciting absorpting circuit is made up of the electric capacity GC5 connected and resistance GR5, and the 2nd RC resistance capaciting absorpting circuit is made up of the electric capacity GC2 connected and resistance GR2.
Described fuse cutout group group forms by the fuse cutout KR1 ~ KR6 of six fast acting fuse RS1 ~ RS6 is parallel with one another.
Described temperature switch group group is composed in series by the temperature switch group WK1 ~ WK6 of six temperature sensors.
It also comprises supply module, and the output of described supply module is connected with the working power input of pulse amplifying module.
Described current acquisition module comprises current transformer L1 summation current transformer L2, and current transformer L1 gathers the electric current of three-phase power input end mouth U end, and current transformer L1 gathers the electric current of three-phase power input end mouth W end.
It also comprises the protection module for carrying out the protection of overcurrent protection, overvoltage protection, under-voltage temperature protection and blast to SCR (PCC) power; the detection input of described protection module is connected with SCR (PCC) power, and the detection output of protection module is connected with PLC processing module.
The invention has the beneficial effects as follows:
(1) the present invention gathers the synchronizing signal of SCR (PCC) power by signal synchronization module, and be entered into PLC processing module and complete and synchronous calculate and detect, PLC processing module sends pulse signal, after this pulse signal amplifies by speed governing power source plate and pulse amplifying module, regulated and controled by the driving power of SCR (PCC) power to direct current machine, this control methods good stability.
(2) the present invention adopts single high-power silicon controlled rectifier compound mode, and than many stable performances in parallel, triggers power consumption is little, does not need strict pairing to use.
(3) the present invention has three kinds of safeguard measures:
One, in pulse amplifying module, between signal synchronization module and SCR (PCC) power, set up multiple temperature switch group, when the temperature of thyristor arbitrary in SCR (PCC) power is too high, temperature switch group disconnects components and parts such as protection follow-up pulse amplifying module and signal synchronization module etc.;
They are two years old, fast acting fuse is provided with between each thyristor and three phase mains interface, and fuse cutout group supporting for fast acting fuse is arranged on current transformer two ends, when three-phase current is abnormal, fast acting fuse disconnects protection SCR (PCC) power, fuse cutout group disconnects, and avoids speed electric plate acquisition abnormity electric current and causes damaging;
Its three, be also provided with for SCR (PCC) power is carried out overcurrent protection, overvoltage protection, under-voltage temperature protection and blast protection protection module.
Accompanying drawing explanation
Fig. 1 is system principle diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention;
Fig. 3 is the circuit theory diagrams of fuse cutout group in the present invention;
Fig. 4 is the circuit theory diagrams of temperature switch group in the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1, direct current machine SCR power expansion control system, it comprises signal synchronization module, pulse amplifying module, SCR (PCC) power, PLC processing module and speed governing power source plate.
The three-phase input end of described SCR (PCC) power is connected with three three-phase power input end mouths respectively, the DC output end of SCR (PCC) power is connected with the direct-flow input end mouth of direct current machine, and the control end of SCR (PCC) power is connected with the trigger impulse output of pulse amplifying module by temperature switch group.
The trigger impulse input of described pulse amplifying module is connected with the trigger impulse output of speed governing power source plate, and the trigger impulse input of speed governing power source plate is connected with the trigger impulse output of PLC processing module.
The current acquisition end of described PLC processing module passes through the input current of current acquisition module acquires three-phase power input end mouth, PLC processing module is by fuse cutout group and current acquisition model calling, the three-phase synchronous voltage acquisition end of PLC processing module is connected with the three-phase synchronous voltage output end of signal synchronization module respectively, and the three-phase synchronous voltage input end of signal synchronization module is connected by the three-phase input end of temperature switch group with SCR (PCC) power.
The direct voltage collection terminal of described PLC processing module is connected with the DC voltage output end of signal synchronization module, and the DC voltage input end of signal synchronization module is connected by the DC output end of temperature switch group with SCR (PCC) power.
The present invention also comprises multiple fast acting fuse, and the input of described multiple fast acting fuses is connected with three-phase power input end mouth respectively, and the output of multiple fast acting fuse is connected with the three-phase input end of SCR (PCC) power respectively.
Described fuse cutout group is the dry contact passive switch supporting with fast acting fuse, is composed in parallel by the linked switch of multiple fast acting fuse.
The present invention also comprises multiple temperature sensor and radiator, and each temperature sensor is all connected with a radiator, and radiator is arranged on the multiple thyristor places in SCR (PCC) power respectively, and the output of temperature sensor is connected with the control end of temperature switch group.
Described temperature switch group is the temperature detection dry contact passive switch supporting with temperature sensor, is composed in series by the linked switch of multiple temperature sensor.
The present invention also comprises velocity transducer, and the input of described velocity transducer gathers the rotating speed of direct current machine, and the output of velocity transducer is connected with the rotating speed input of PLC processing module.
Described fast acting fuse comprises fast acting fuse RS1 ~ RS6.
As shown in Figure 2, described SCR (PCC) power is three-phase fully-controlled bridge circuit, comprises three groups of power models.
Wherein, first power model comprises thyristor VT1, thyristor VT4, a RC resistance capaciting absorpting circuit and the 4th RC resistance capaciting absorpting circuit, the anode of described thyristor VT1 is held with the U of three-phase power input end mouth by fast acting fuse RS2 and is connected, the negative electrode of thyristor VT1 is connected with the positive pole of direct-flow input end mouth, between the anode that a RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT1 and negative electrode.
The negative electrode of thyristor VT4 is held with the U of three-phase power input end mouth by fast acting fuse RS1 and is connected, the anode of thyristor VT4 is connected with the negative pole of direct-flow input end mouth, between the negative electrode that 4th RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT1 and anode, one RC resistance capaciting absorpting circuit is made up of the electric capacity GC1 connected and resistance GR1, and the 4th RC resistance capaciting absorpting circuit is made up of the electric capacity GC4 connected and resistance GR4.
Second power model comprises thyristor VT3, thyristor VT6, the 3rd RC resistance capaciting absorpting circuit and the 6th RC resistance capaciting absorpting circuit, the anode of described thyristor VT3 is held with the V of three-phase power input end mouth by fast acting fuse RS4 and is connected, the negative electrode of thyristor VT3 is connected with the positive pole of direct-flow input end mouth, between the anode that the 3rd RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT3 and negative electrode.
The negative electrode of thyristor VT6 is held with the V of three-phase power input end mouth by fast acting fuse RS3 and is connected, the anode of thyristor VT6 is connected with the negative pole of direct-flow input end mouth, between the negative electrode that 6th RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT6 and anode, 3rd RC resistance capaciting absorpting circuit is made up of the electric capacity GC3 connected and resistance GR3, and the 6th RC resistance capaciting absorpting circuit is made up of the electric capacity GC6 connected and resistance GR6.
3rd power model comprises thyristor VT5, thyristor VT2, the 5th RC resistance capaciting absorpting circuit and the 2nd RC resistance capaciting absorpting circuit, the anode of described thyristor VT5 is held with the W of three-phase power input end mouth by fast acting fuse RS6 and is connected, the negative electrode of thyristor VT5 is connected with the positive pole of direct-flow input end mouth, between the anode that the 5th RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT5 and negative electrode.
The negative electrode of thyristor VT2 is held with the W of three-phase power input end mouth by fast acting fuse RS5 and is connected, the anode of thyristor VT2 is connected with the negative pole of direct-flow input end mouth, between the negative electrode that 2nd RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT2 and anode, 5th RC resistance capaciting absorpting circuit is made up of the electric capacity GC5 connected and resistance GR5, and the 2nd RC resistance capaciting absorpting circuit is made up of the electric capacity GC2 connected and resistance GR2.
As shown in Figure 3, described fuse cutout group forms by the fuse cutout KR1 ~ KR6 of six fast acting fuse RS1 ~ RS6 is parallel with one another.The two ends of each fuse cutout are provided with dry contact.
As shown in Figure 4, described temperature switch group is composed in series by the temperature switch WK1 ~ WK6 of six temperature sensors.The two ends of each temperature switch are provided with dry contact.
Wherein, between the negative electrode that temperature switch WK1 is connected in parallel on thyristor VT1 and gate pole, between the negative electrode that temperature switch WK2 is connected in parallel on thyristor VT2 and gate pole, between the negative electrode that temperature switch WK3 is connected in parallel on thyristor VT3 and gate pole, between the negative electrode that temperature switch WK4 is connected in parallel on thyristor VT4 and gate pole, between the negative electrode that temperature switch WK5 is connected in parallel on thyristor VT5 and gate pole, between the negative electrode that temperature switch WK6 is connected in parallel on thyristor VT6 and gate pole.
The present invention also comprises supply module, and the output of described supply module is connected with the working power input of pulse amplifying module.
The present invention also comprises the protection module for carrying out the protection of overcurrent protection, overvoltage protection, under-voltage temperature protection and blast to SCR (PCC) power; the detection input of described protection module is connected with SCR (PCC) power, and the detection output of protection module is connected with PLC processing module.
Described current acquisition module comprises current transformer L1 summation current transformer L2, and current transformer L1 gathers the electric current of three-phase power input end mouth U end, and current transformer L1 gathers the electric current of three-phase power input end mouth W end.
The input X2_K1 of pulse amplifying module is connected with the negative electrode of thyristor VT1 by the dry contact TB1-1 of temperature switch WK1, and the output X2_G1 of pulse amplifying module is connected with the gate pole of thyristor VT1 by the dry contact TB1-2 of temperature switch WK1.
The input X8_K1 of pulse amplifying module is connected with the negative electrode of thyristor VT4 with the dry contact TB1-3 of temperature switch WK4 by dry contact TB1-4 successively, and the output X8_G1 of pulse amplifying module is connected with the gate pole of thyristor VT4 by the dry contact TB1-5 of temperature switch WK4.
The input X4_K1 of pulse amplifying module is connected with the negative electrode of thyristor VT3 by the dry contact TB1-6 of temperature switch WK3, and the output X4_G1 of pulse amplifying module is connected with the gate pole of thyristor VT3 by the dry contact TB1-7 of temperature switch WK3.
The input X10_K1 of pulse amplifying module is connected with the negative electrode of thyristor VT6 with the dry contact TB1-8 of temperature switch WK6 by dry contact TB1-9 successively, and the output X10_G1 of pulse amplifying module is connected with the gate pole of thyristor VT6 by the dry contact TB1-10 of temperature switch WK6.
The input X6_K1 of pulse amplifying module is connected with the negative electrode of thyristor VT5 by the dry contact TB1-11 of temperature switch WK5, and the output X6_G1 of pulse amplifying module is connected with the gate pole of thyristor VT5 by the dry contact TB1-12 of temperature switch WK5.
The input X12_K1 of pulse amplifying module is connected with the negative electrode of thyristor VT2 with the dry contact TB1-13 of temperature switch WK2 by dry contact TB1-14 successively, and the output X12_G1 of pulse amplifying module is connected with the gate pole of thyristor VT2 by the dry contact TB1-15 of temperature switch WK2.
The input X1_24V+ of described pulse amplifying module is connected with the positive pole dry contact TB3-1 of supply module, the output X1_K11 of pulse amplifying module is connected with the negative pole dry contact TB3-2 of supply module and the input X11_2 of speed governing power source plate respectively, the input X1_G11 of pulse amplifying module is connected with the output X11_1 of speed governing power source plate, the input X7_24V+ of pulse amplifying module is connected with the positive pole dry contact TB3-1 of supply module, the output X7_K14 of pulse amplifying module is connected with the negative pole dry contact TB3-2 of supply module and the input X14_2 of speed governing power source plate respectively, the input X7_G14 of pulse amplifying module is connected with the output X14_1 of speed governing power source plate,
The input X3_24V+ of pulse amplifying module is connected with the positive pole dry contact TB3-1 of supply module, the output X3_K13 of pulse amplifying module is connected with the negative pole dry contact TB3-2 of supply module and the input X13_2 of speed governing power source plate respectively, the input X3_G11 of pulse amplifying module is connected with the output X13_1 of speed governing power source plate, the input X9_24V+ of pulse amplifying module is connected with the positive pole dry contact TB3-1 of supply module, the output X9_K16 of pulse amplifying module is connected with the negative pole dry contact TB3-2 of supply module and the input X16_2 of speed governing power source plate respectively, the input X9_G16 of pulse amplifying module is connected with the output X16_1 of speed governing power source plate, the input X5_24V+ of pulse amplifying module is connected with the positive pole dry contact TB3-1 of supply module, the output X5_K15 of pulse amplifying module is connected with the negative pole dry contact TB3-2 of supply module and the input X15_2 of speed governing power source plate respectively, the input X5_G15 of pulse amplifying module is connected with the output X15_1 of speed governing power source plate, the input X11_24V+ of pulse amplifying module is connected with the positive pole dry contact TB3-1 dry contact TB3-1 of supply module, the output X11_K12 of pulse amplifying module is connected with the negative pole dry contact TB3-2 dry contact TB3-2 of supply module and the input X12_2 of speed governing power source plate respectively, the input X11_G12 of pulse amplifying module is connected with the output X12_1 of speed governing power source plate.
Supply module exports 24V voltage.
The current acquisition end X3_1 of described speed governing power source plate is held with the X1 of current transformer L1 by dry contact TB2-19 and is connected, and the current acquisition end X3_2 of speed governing power source plate is held with the X2 of current transformer L1 by dry contact TB2-20 and is connected; The current acquisition end X3_3 of speed governing power source plate is held with the X1 of current transformer L2 by dry contact TB2-21 and is connected, and the current acquisition end X4_1 of speed governing power source plate is held with the X2 of current transformer L2 by dry contact TB2-22 and is connected.Dry contact TB2-19, dry contact TB2-20, dry contact TB2-21 and dry contact TB2-22 are all connected with fuse cutout group.
The synchronous signal acquisition end X10_U of speed governing power source plate is connected with the synchronous signal output end X2_OUT/U14 of signal synchronization module, the synchronous signal acquisition end X10_V of speed governing power source plate is connected with the synchronous signal output end X2_OUT/V14 of signal synchronization module, and the synchronous signal acquisition end X10_W of speed governing power source plate is connected with the synchronous signal output end X2_OUT/W14 of signal synchronization module.
The direct voltage collection terminal X9_DC+ of speed governing power source plate is connected with the DC voltage output end X4_OUT/DC+ of signal synchronization module, and the direct voltage collection terminal X9_DC-of speed governing power source plate is connected with the DC voltage output end X4_OUT/DC-of signal synchronization module.
The synchronous signal input end X1_IN/U4 of signal synchronization module is connected with the negative electrode of thyristor VT4 with the dry contact TB1-3 of temperature switch WK4 by dry contact TB1-4 successively, the synchronous signal input end X1_IN/V4 of signal synchronization module is connected with the negative electrode of thyristor VT3 with the dry contact TB1-8 of temperature switch WK6 by dry contact TB1-9 successively, and the synchronous signal input end X1_IN/W4 of signal synchronization module is connected with the negative electrode of thyristor VT5 with the dry contact TB1-13 of temperature switch WK2 by dry contact TB1-14 successively.
The DC voltage input end X3_IN/DC+ of signal synchronization module is connected with the positive pole C1 of direct-flow input end mouth by dry contact TB1-16, and the DC voltage input end X3_IN/DC-of signal synchronization module is connected with the negative pole D1 of direct-flow input end mouth by dry contact TB1-17.
Symbol TB in circuit diagram of the present invention all represents a dry contact.
Supply module of the present invention provides power supply for PLC processing module and SCR (PCC) power; Signal synchronous plate by synchronous transmission of signal to PLC processing module, the synchronization pulse of detection computations is delivered to speed governing power source plate and pulse amplifying module by PLC processing module, pulse amplifying module sends signal and triggers SCR (PCC) power, and SCR (PCC) power controls the driving power of direct current machine.Direct current machine is provided with the velocity transducer detecting its rotating speed, and SCR (PCC) power is connected with protection module, and the information of collection is sent to PLC processing module by velocity transducer and protection module.
PLC processing module is the control test section of digital compact direct current speeder, the input supply voltage of this device is the single-phase or three-phase 400V AC power of 230V, it is to provide single quadrant or four-quadrant impulsive synchronization triggers and micro-processing and control element (PCE) of control algorithm, six roads or the 12 pulse triggering signal sources, road of three-phase symmetrical can be exported as requested, follow-up power cell is provided to the guarantee of dependable performance.
PLC processing module accessible site is in speed governing power source plate, and speed governing power source plate can select the C98043-A7002 module of 6RA70 series.
Pulse amplifying module by low power triggering signal, can expand to the pulse-triggered that can trigger large power assembly, and with micro-processing controls trigger element stringent synchronization, can adapt to reliably thyristor (PCC) power control trigger requirement.
PLC processing module with it compact and joint space-efficient structure for characteristic.Because each parts are easily close, its compact design makes their especially easily maintenances, and electron plate case comprises basic electron plate and any add-in card.And being equipped with an ease of Use panel PMU, panel is made up of 57 sections of display screens, three state display LED and three optimum configurations keys, and guidance panel PMU also has according to the connector of RS232 or RS485 standard with USB interface.Guidance panel provides all instruments in order to start adjustment and setting and the measured value display carried out needed for rectifier, its frequency of supply can within 45 ~ 65Hz scope, because this PLC processor control device supply module and impulse phase automatic synchronization, so to power phase sequence not requirement to inlet wire, export pulse and synchronously automatically identify distribution by microprocessor system.
The present invention further provided with fast fuse and the instruction of supporting fuse trip, and is the passive output of dry contact.SCR (PCC) power is three-phase fully-controlled bridge circuit, and every SCR element is all added with resistance-capacitance absorption, and is added with temperature sensor; AC-input voltage is allowed to be less than 700V.Signal synchronous plate designs for the line voltage of 600V, because 6RA70 series small-power microprocessor controller detecting unit is 400V electric pressure, according to resistant series decompression and parallel shunt principle, the electric current and voltage dividing potential drop of 600V ac power supply circuit is shunted by the synchronous electric source plate being connected with pulse amplifying module by this, can be adapted to 6RA70 series small-power microprocessor controller detecting unit.
Supply module is powered to apparatus system, the synchronizing signal gathered by signal synchronous plate sends into PLC processor control unit, complete synchronous detection computations, and the trigger impulse that pulse lock in time of calculating and PLC processor produce is delivered to pulse amplifying module in the lump, then SCR (PCC) power is triggered by pulse amplifying module, make the corresponding each phase (PCC) power of corresponding trigger impulse, the driving being completed motor by SCR (PCC) power drive motor means operates.
The protection of SCR (PCC) power is detected by the circuit of protection module, and detection signal is sent into PLC processing module and process, and this detection protective circuit provides overcurrent, overvoltage, under-voltage temperature, blast protection.The information of collection is sent to PLC processor by velocity transducer and protection module, can carry out monitor and detection to the rotating speed of direct current machine.
Claims (10)
1. direct current machine SCR power expansion control system, is characterized in that: it comprises signal synchronization module, pulse amplifying module, SCR (PCC) power, PLC processing module and speed governing power source plate;
The three-phase input end of described SCR (PCC) power is connected with three three-phase power input end mouths respectively, the DC output end of SCR (PCC) power is connected with the direct-flow input end mouth of direct current machine, and the control end of SCR (PCC) power is connected with the trigger impulse output of pulse amplifying module by temperature switch group;
The trigger impulse input of described pulse amplifying module is connected with the trigger impulse output of speed governing power source plate, and the trigger impulse input of speed governing power source plate is connected with the trigger impulse output of PLC processing module;
The current acquisition end of described PLC processing module passes through the input current of current acquisition module acquires three-phase power input end mouth, PLC processing module is by fuse cutout group and current acquisition model calling, the three-phase synchronous voltage acquisition end of PLC processing module is connected with the three-phase synchronous voltage output end of signal synchronization module respectively, and the three-phase synchronous voltage input end of signal synchronization module is connected by the three-phase input end of temperature switch group with SCR (PCC) power;
The direct voltage collection terminal of described PLC processing module is connected with the DC voltage output end of signal synchronization module, and the DC voltage input end of signal synchronization module is connected by the DC output end of temperature switch group with SCR (PCC) power.
2. direct current machine SCR power expansion control system according to claim 1, it is characterized in that: it also comprises multiple fast acting fuse, the input of described multiple fast acting fuses is connected with three-phase power input end mouth respectively, and the output of multiple fast acting fuse is connected with the three-phase input end of SCR (PCC) power respectively;
Described fuse cutout group is the dry contact passive switch supporting with multiple fast acting fuse, is composed in parallel by the linked switch of multiple fast acting fuse.
3. direct current machine SCR power expansion control system according to claim 1, it is characterized in that: it also comprises multiple temperature sensor and radiator, each temperature sensor is all connected with a radiator, radiator is arranged on the multiple thyristor places in SCR (PCC) power respectively, and the output of temperature sensor is connected with the control end of temperature switch group;
Described temperature switch group is the temperature detection dry contact passive switch supporting with temperature sensor, is composed in series by the linked switch of multiple temperature sensor.
4. direct current machine SCR power expansion control system according to claim 1, it is characterized in that: it also comprises velocity transducer, the input of described velocity transducer gathers the rotating speed of direct current machine, and the output of velocity transducer is connected with the rotating speed input of PLC processing module.
5. direct current machine SCR power expansion control system according to claim 2, is characterized in that: described fast acting fuse comprises fast acting fuse RS1 ~ RS6;
Described SCR (PCC) power is three-phase fully-controlled bridge circuit, comprises three groups of power models;
Wherein, first power model comprises thyristor VT1, thyristor VT4, a RC resistance capaciting absorpting circuit and the 4th RC resistance capaciting absorpting circuit, the anode of described thyristor VT1 is held with the U of three-phase power input end mouth by fast acting fuse RS2 and is connected, the negative electrode of thyristor VT1 is connected with the positive pole of direct-flow input end mouth, between the anode that a RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT1 and negative electrode;
The negative electrode of thyristor VT4 is held with the U of three-phase power input end mouth by fast acting fuse RS1 and is connected, the anode of thyristor VT4 is connected with the negative pole of direct-flow input end mouth, between the negative electrode that 4th RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT1 and anode, one RC resistance capaciting absorpting circuit is made up of the electric capacity GC1 connected and resistance GR1, and the 4th RC resistance capaciting absorpting circuit is made up of the electric capacity GC4 connected and resistance GR4;
Second power model comprises thyristor VT3, thyristor VT6, the 3rd RC resistance capaciting absorpting circuit and the 6th RC resistance capaciting absorpting circuit, the anode of described thyristor VT3 is held with the V of three-phase power input end mouth by fast acting fuse RS4 and is connected, the negative electrode of thyristor VT3 is connected with the positive pole of direct-flow input end mouth, between the anode that the 3rd RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT3 and negative electrode;
The negative electrode of thyristor VT6 is held with the V of three-phase power input end mouth by fast acting fuse RS3 and is connected, the anode of thyristor VT6 is connected with the negative pole of direct-flow input end mouth, between the negative electrode that 6th RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT6 and anode, 3rd RC resistance capaciting absorpting circuit is made up of the electric capacity GC3 connected and resistance GR3, and the 6th RC resistance capaciting absorpting circuit is made up of the electric capacity GC6 connected and resistance GR6;
3rd power model comprises thyristor VT5, thyristor VT2, the 5th RC resistance capaciting absorpting circuit and the 2nd RC resistance capaciting absorpting circuit, the anode of described thyristor VT5 is held with the W of three-phase power input end mouth by fast acting fuse RS6 and is connected, the negative electrode of thyristor VT5 is connected with the positive pole of direct-flow input end mouth, between the anode that the 5th RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT5 and negative electrode;
The negative electrode of thyristor VT2 is held with the W of three-phase power input end mouth by fast acting fuse RS5 and is connected, the anode of thyristor VT2 is connected with the negative pole of direct-flow input end mouth, between the negative electrode that 2nd RC resistance capaciting absorpting circuit is connected in parallel on thyristor VT2 and anode, 5th RC resistance capaciting absorpting circuit is made up of the electric capacity GC5 connected and resistance GR5, and the 2nd RC resistance capaciting absorpting circuit is made up of the electric capacity GC2 connected and resistance GR2.
6. direct current machine SCR power expansion control system according to claim 5, is characterized in that: described fuse cutout group group forms by the fuse cutout KR1 ~ KR6 of six fast acting fuse RS1 ~ RS6 is parallel with one another.
7. direct current machine SCR power expansion control system according to claim 3, is characterized in that: described temperature switch group group is composed in series by the temperature switch group WK1 ~ WK6 of six temperature sensors.
8. direct current machine SCR power expansion control system according to claim 1, it is characterized in that: it also comprises supply module, the output of described supply module is connected with the working power input of pulse amplifying module.
9. direct current machine SCR power expansion control system according to claim 1, it is characterized in that: described current acquisition module comprises current transformer L1 summation current transformer L2, current transformer L1 gathers the electric current of three-phase power input end mouth U end, and current transformer L1 gathers the electric current of three-phase power input end mouth W end.
10. direct current machine SCR power expansion control system according to claim 1; it is characterized in that: it also comprises the protection module for carrying out the protection of overcurrent protection, overvoltage protection, under-voltage temperature protection and blast to SCR (PCC) power; the detection input of described protection module is connected with SCR (PCC) power, and the detection output of protection module is connected with PLC processing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410807214.XA CN104485862A (en) | 2014-12-23 | 2014-12-23 | SCR power expansion control system of direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410807214.XA CN104485862A (en) | 2014-12-23 | 2014-12-23 | SCR power expansion control system of direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104485862A true CN104485862A (en) | 2015-04-01 |
Family
ID=52760379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410807214.XA Pending CN104485862A (en) | 2014-12-23 | 2014-12-23 | SCR power expansion control system of direct current motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104485862A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958878A (en) * | 2016-06-24 | 2016-09-21 | 南京工程学院 | Speed regulation apparatus and method for digitized thyristor direct current motor |
| CN109787519A (en) * | 2018-12-29 | 2019-05-21 | 湖南鼎创装备有限公司 | A kind of DC motor drive and method |
| CN112994541A (en) * | 2021-02-04 | 2021-06-18 | 胡晓莉 | SCR power expansion control system for direct current motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039686A (en) * | 1988-07-26 | 1990-02-14 | 国营宏明无线电器材厂 | Invertible thyristor speed-regulating device of dc motor |
| CN2692916Y (en) * | 2004-02-20 | 2005-04-13 | 李娜 | Full-digital CD motor speed-regulating control cabinet |
| CN101060302A (en) * | 2006-03-14 | 2007-10-24 | 通用汽车环球科技运作公司 | Wye switch inverter for electric and hybrid vehicles |
-
2014
- 2014-12-23 CN CN201410807214.XA patent/CN104485862A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039686A (en) * | 1988-07-26 | 1990-02-14 | 国营宏明无线电器材厂 | Invertible thyristor speed-regulating device of dc motor |
| CN2692916Y (en) * | 2004-02-20 | 2005-04-13 | 李娜 | Full-digital CD motor speed-regulating control cabinet |
| CN101060302A (en) * | 2006-03-14 | 2007-10-24 | 通用汽车环球科技运作公司 | Wye switch inverter for electric and hybrid vehicles |
Non-Patent Citations (3)
| Title |
|---|
| 张金男: "基于PLC控制技术的大功率直流电机调速系统的研究与设计", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
| 王雪松等: "基于PLC-200的大功率直流电动机调速系统的设计", 《大连海事大学学报》 * |
| 黄谋甫: "三相全控桥整流电路供电的并励直流电动机调速系统的设计", 《湖北民族学院学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958878A (en) * | 2016-06-24 | 2016-09-21 | 南京工程学院 | Speed regulation apparatus and method for digitized thyristor direct current motor |
| CN105958878B (en) * | 2016-06-24 | 2019-03-22 | 南京工程学院 | A kind of digitlization thyristor dc motor speed control device and method |
| CN109787519A (en) * | 2018-12-29 | 2019-05-21 | 湖南鼎创装备有限公司 | A kind of DC motor drive and method |
| CN112994541A (en) * | 2021-02-04 | 2021-06-18 | 胡晓莉 | SCR power expansion control system for direct current motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100386961C (en) | Full digitalized vector control type high-voltage large-power frequency converter based on DSP chip | |
| CN103560725B (en) | A kind of Brushless DC Motor Position detection method independent of rotating speed | |
| CN104485862A (en) | SCR power expansion control system of direct current motor | |
| CN204357416U (en) | A kind of Flying by wire system for top-drive device | |
| CN104989381A (en) | Soft measuring method and device for stroke period of beam-pumping unit | |
| CN103701141B (en) | Novel multifunctional encoder switch | |
| CN103901309A (en) | Test method for high-voltage lead uncleared test device of 220-kV zinc oxide arrester | |
| CN104777396B (en) | Rotor fault diagnosis method giving comprehensive consideration to current and voltage of motor | |
| CN102324781A (en) | Novel power supply quick switching control system and switching method thereof | |
| CN103104532B (en) | A kind of mining intelligent ventilator controller | |
| CN203233147U (en) | Low voltage frequency converter with overheating protection function | |
| CN206878469U (en) | A kind of silent oscillation reacance generator with fault electric arc detection function | |
| CN104767441B (en) | Power control system and method | |
| CN202696530U (en) | Digitalized direct-current regulator | |
| CN204028237U (en) | A kind of photovoltaic produces line aging testing system | |
| CN108011357B (en) | A kind of thyristor groups string protective device and method | |
| CN2921851Y (en) | Traction electric machine test platform | |
| CN106385210B (en) | Continuous current locomotive speed control unit and method based on flexible AC pressure regulation | |
| CN206158920U (en) | Permanent magnet wind turbine self -power becomes oar system | |
| CN206472347U (en) | A kind of LED drive device and its surging protection circuit | |
| CN105810065A (en) | Microcomputer transformer protection teaching device | |
| CN106788055A (en) | A kind of rotor resistance identification method and system applied in motor control | |
| CN203839954U (en) | Novel multifunctional code switch with temperature control function | |
| CN104316805B (en) | Testing device for high-capacity direct-current electric appliance | |
| CN201925139U (en) | Automatic control device of air compressor for mines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150401 |
|
| RJ01 | Rejection of invention patent application after publication |