CN103138674B - High-power brushless double-fed motor variable frequency speed control system and control method - Google Patents
High-power brushless double-fed motor variable frequency speed control system and control method Download PDFInfo
- Publication number
- CN103138674B CN103138674B CN201310105032.3A CN201310105032A CN103138674B CN 103138674 B CN103138674 B CN 103138674B CN 201310105032 A CN201310105032 A CN 201310105032A CN 103138674 B CN103138674 B CN 103138674B
- Authority
- CN
- China
- Prior art keywords
- unit
- phase
- power
- voltage
- contactor
- 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.)
- Active
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
A kind of high-power brushless double-fed motor variable frequency speed control system, comprise power winding and the controlled winding of high-power brushless double-fed motor, also comprise the first contactor, input power power supply unit, input switch, soft starting circuit, alternating current-direct current rectification unit, storage capacitor, operation and display unit, and by excitation controller, inversion unit, first current detecting unit, second current detecting unit, the excitation con-trol of voltage detection unit composition and inversion module, input power power supply unit is connected after power windings in series first contactor, input switch, alternating current-direct current rectification unit, storage capacitor, described controlled winding is connected after inversion unit, on circuit between the three-phase output end that described soft starting circuit is connected on described alternating current-direct current rectification unit and described input switch, or on the circuit being connected between described alternating current-direct current rectification unit and storage capacitor.The omnidistance frequency control of brushless double-fed motor can be completed.Also comprise basic Control timing sequence and method.
Description
Technical field
The present invention relates to a kind of control system and control method, particularly relate to a kind of control system for high-power brushless double-fed motor and control method.
Background technology
At present, the research of brushless dual-feed motor design and control system thereof carries out decades, but because brushless double-fed motor system model is complicated, there is no ready-made control algolithm and control system, particularly for powerful brushless double-fed motor, the high voltage converter cost adopted is high, volume is large, rated capacity is large, and energy consumption is serious, and Control system architecture is complicated, Operation and Maintenance difficulty, do not have efficient Control timing sequence and method, these problems all seriously hinder applying of it, so also do not have the report of industrialization in the whole world so far.
Summary of the invention
The object of this invention is to provide a kind of high-power brushless double-fed motor variable frequency speed control system, solve small-power excitation controller and control the technical problem that high-power brushless double-fed motor cannot realize full distance speed regulating.
Another object of the present invention is to provide a kind of method utilizing above-mentioned frequency conversion speed-adjusting system to carry out high-power brushless double-fed motor control, realizes the full distance speed regulating to high-power brushless double-fed motor.
High-power brushless double-fed motor variable frequency speed control system of the present invention, comprise power winding and the controlled winding of high-power brushless double-fed motor, wherein: also comprise the first contactor, input power power supply unit, input switch, soft starting circuit, alternating current-direct current rectification unit, storage capacitor, operation and display unit, and the excitation con-trol to be made up of excitation controller, inversion unit, the first current detecting unit, the second current detecting unit, voltage detection unit and inversion module
The three-phase incoming line of described power winding is connected and is connected a three-phase output end of described input power power supply unit after the first contactor, another three-phase output end of described input power power supply unit connects the three-phase input end of described input switch by three-phase line, the three-phase output end of described input switch connects the three-phase input end of described alternating current-direct current rectification unit by three-phase line, after storage capacitor described in the positive and negative DC bus sequential series of described alternating current-direct current rectification unit output, connect the positive and negative direct-flow input end of described inversion unit, the three-phase output end of described inversion unit connects described controlled winding by three-phase line, on circuit between the three-phase output end that described soft starting circuit is connected on described alternating current-direct current rectification unit and described input switch, or on the circuit being connected between described alternating current-direct current rectification unit and storage capacitor, described operation and carry out data cube computation by serial communication mode between display and described excitation controller,
Described excitation controller gathers the curent change of three-phase line between described power winding and the first contactor by described first current detecting unit, the curent change of three-phase line between controlled winding and described inversion unit is gathered by described second current detecting unit, gathered the change in voltage of three-phase line between described input switch and described input power power supply unit by described voltage detection unit, and generate the control signal of described first contactor of control and generate the pwm signal controlling described inversion unit and export.
Described alternating current-direct current rectification unit is full-bridge rectification unit, also comprise brake unit and brake resistance, described soft starting circuit is connected on the DC bus between full-bridge rectification unit output and described storage capacitor, described brake unit in parallel on positive and negative DC bus between described soft starting circuit and described storage capacitor, described brake unit described brake resistance in parallel.
Described alternating current-direct current rectification unit is PWM rectification unit, also comprises BOOST reactor, soft starting circuit and described BOOST reactor described in sequential series on the circuit between the three-phase output end and PWM rectification unit of described input switch.
Described input power power supply unit is low voltage electric network power supply unit.
Described input power power supply unit comprises high-voltage fence power supply unit and low voltage electric network power supply unit, also comprise transformer, described first contactor of three-phase output end series connection of described high-voltage fence power supply unit, another three-phase output end of described high-voltage fence power supply unit is connected with the primary side of described transformer, the secondary side of described transformer connects the power input of described low voltage electric network power supply unit, and the three-phase output end of described low voltage electric network power supply unit connects the three-phase input end of input switch by three-phase line.
Described BOOST reactor is directly connected between PWM rectification unit and soft starting circuit, or and non-capacitive element be connected between PWM rectification unit and soft starting circuit.
Described soft starting circuit adopts three-phase soft start or two-phase soft start syndeton when being used for three-phase line, adopts two-phase soft start or single-phase soft start syndeton when described soft starting circuit is used for positive and negative DC line.
Described PWM rectification unit and described inversion unit can adopt the one in silicon controlled rectifier, gate electrode capable of switching off device, power transistor, MOSFET, igbt, integrated gate commutated thyristor, SGCT for break-make modulation power semiconductor device.
Utilize above-mentioned high-power brushless double-fed motor variable frequency speed control system to carry out the control method of frequency control, it is characterized in that comprising the following steps:
S100, closed input switch, soft starting circuit work, system judges whether the voltage on storage capacitor reaches operating point.
If after the voltage on s110 storage capacitor does not reach operating point, then soft starting circuit release, display that system is under-voltage is shut down, and re-starts judgement;
If after the voltage on s120 storage capacitor reaches operating point, then soft starting circuit closes;
S200, voltage detection unit detect the change in voltage on the three-phase line between low voltage electric network power supply unit and input switch by voltage signal acquisition end, send image data to excitation controller, excitation controller carries out phase-locked process to its frequency and phase place;
S300, by I/O interface or remote communication interface or operation and display unit, the operations such as control command, frequency, sampling are carried out to excitation controller; After receiving action command, excitation controller, according to the frequency of electrical network and phase place, sends the output voltage of same frequency and antiphase from pwm signal output;
S400, after time delay a period of time, closed first contactor, high-power brushless double-fed motor is in zero-speed running status;
After s500, end time delay, excitation controller runs according to the frequency set and Acceleration and deceleration time; The curent change of the different winding of brushless double-fed motor is detected by the first current detecting unit and the second current detecting unit; And controlled by operation and display unit or general purpose I/O interface or remote communication interface;
S600, after excitation controller receives halt command, according to deceleration time, first decelerate to zero-speed, then control disconnection first contactor by the control input end of the first contactor, after time delay, then close excitation export.
Utilize above-mentioned high-power brushless double-fed motor variable frequency speed control system to carry out the control method of frequency control, it is characterized in that comprising the following steps:
S10, closed input switch, soft starting circuit work, system judges whether the voltage on storage capacitor reaches operating point;
If after the voltage on s11 storage capacitor does not reach operating point, then soft starting circuit release, display that system is under-voltage is shut down, and re-starts judgement;
If after the voltage on s12 storage capacitor reaches operating point, then soft starting circuit closes;
S20, voltage detection unit detect the change in voltage on the three-phase line between low voltage electric network power supply unit and input switch by voltage signal acquisition end, send image data to excitation controller, excitation controller carries out phase-locked process to its frequency and phase place, and PWM rectification unit is started working;
S30, by I/O interface or remote communication interface or operation and display unit, the operations such as control command, frequency, sampling are carried out to excitation controller; After receiving action command, excitation controller, according to the frequency of electrical network and phase place, sends the output voltage of same frequency and antiphase from pwm signal output;
S40, after time delay a period of time, closed first contactor, motor is in zero-speed running status;
After s50, end time delay, excitation controller runs according to the frequency set and Acceleration and deceleration time; The curent change of the different winding of brushless double-fed motor is detected by the first current detecting unit and the second current detecting unit; And controlled by operation and display unit or general purpose I/O interface or remote communication interface;
S60, after excitation controller receives halt command, according to deceleration time, first decelerate to zero-speed, then control disconnection first contactor by the control input end of the first contactor, after time delay, then close excitation export.
High-power brushless double-fed motor variable frequency speed control system reliability of the present invention is high, when excitation controller damages, controlled winding can automatically switch to power frequency or automatically realize controlled winding short circuit, compare total power frequency control, its system reliability is high, do not need independent soft initiator, system manufacturing cost is lower.The control power consumed is not more than motor maximum power 30%, and more energy-conservation compared with total power frequency control, operating cost is low.Both electric operation mode can be operated in, also running under braking mode can be operated in, can omnidistance frequency control from zero-speed to normal speed.The present invention is applicable to the load of long-time running more than synchronous speed, only carries out the high-power brushless double-fed motor of acceleration and deceleration below synchronous speed, is also applicable to acceleration and deceleration high-power brushless double-fed motor that is frequent or that run below synchronous speed for a long time.
Both the power winding of high-power brushless double-fed motor can have been made can to share a power supply with controlled winding, power winding also can be made to utilize independent high voltage source, and reduce the current loss of brushless double-fed motor stator, raise the efficiency.Rotating controlling functions can be carried out to high-power brushless double-fed motor: can according to operating instruction, automatic switchover electrical network phase sequence and excitation phase sequence, change motor rotation direction.Compare brush doubly-fed adjustable speed, there are not the brush parts needing periodic maintenance, safeguarded simple.Frequency conversion speed-adjusting system of the present invention is widely used in the brushless types of any rotor structures such as special cage-type rotor, reluctance type rotor, wound rotor and composite rotors.
Below in conjunction with accompanying drawing, embodiments of the invention are described further.
Accompanying drawing explanation
Fig. 1 is the structural representation of high-power brushless double-fed motor variable frequency speed control system embodiment 1;
Fig. 2 is the structural representation of high-power brushless double-fed motor variable frequency speed control system embodiment 2;
Fig. 3 is the structural representation of high-power brushless double-fed motor variable frequency speed control system embodiment 3;
Fig. 4 is the structural representation of high-power brushless double-fed motor variable frequency speed control system embodiment 4;
Fig. 5 is a kind of method flow diagram utilizing frequency conversion speed-adjusting system of the present invention to carry out high-power brushless double-fed motor speed regulating control;
Fig. 6 is the another kind of method flow diagram utilizing frequency conversion speed-adjusting system of the present invention to carry out high-power brushless double-fed motor speed regulating control.
Embodiment
As shown in Figure 1, the present embodiment 1 comprises excitation controller 8, inversion unit 10, first current detecting unit 2, second current detecting unit 7, voltage detection unit 13, storage capacitor 11, soft starting circuit 14, full-bridge rectification unit 15, input switch 12, low voltage electric network power supply unit 18, transformer 19, high-voltage fence power supply unit 20, first contactor 1, operation and display unit 9, brake unit 16 and brake resistance 17.Wherein, excitation controller 8, inversion unit 10, first current detecting unit 2, second current detecting unit 7, voltage detection unit 13 form excitation con-trol and inversion module 51, and excitation controller 8 comprises serial communication interface, general I/O interface 5 and special remote communication interface 6.
The three-phase incoming line of the power winding 4 of high-power brushless double-fed motor is connected and is connected the three-phase output end of high-voltage fence power supply unit 20 after the first contactor 1, by connection transformer 19 between high-voltage fence power supply unit 20 and low voltage electric network power supply unit 18, adaptive voltage of power, the three-phase output end of low voltage electric network power supply unit 18 connects the three-phase input end of input switch 12 by three-phase line, the three-phase output end of input switch 12 connects full-bridge rectification unit 15 three-phase input end by three-phase line, after the positive and negative DC bus sequential series soft starting circuit 14 of full-bridge rectification unit 15 output and storage capacitor 11, connect the positive and negative direct-flow input end of inversion unit 10 of excitation con-trol and inversion module 51, the three-phase output end of inversion unit 10 connects the controlled winding 3 of high-power brushless double-fed motor by three-phase line, positive and negative DC bus between soft starting circuit 14 and storage capacitor 11 is also parallel with brake unit 16, and brake unit 16 is also parallel with brake resistance 17, the current signal collection terminal M of the first current detecting unit 2 is connected on the three-phase line between the first contactor 1 and power winding 4, and the output of the first current detecting unit 2 is connected to the first signal input part of excitation controller 8, the current signal collection terminal M of the second current detecting unit 7 is connected on the three-phase line between inversion unit 10 and controlled winding 3, and the output of the second current detecting unit 7 is connected to the secondary signal input of excitation controller 8, the voltage signal acquisition end of voltage detection unit 13, is connected on the three-phase line between low voltage electric network power supply unit 18 and input switch 12, and the output of voltage detection unit 13 is connected to the 3rd signal input part of excitation controller 8, the pwm signal output of excitation controller 8 is connected with the pwm signal input of inversion unit 10.
High-voltage fence power supply unit 20 for accessing the high-tension electricity of local power grid or power supply,
Low voltage electric network power supply unit 18 is for accessing the low-voltage power of local power grid or power supply.
As shown in Figure 2, in the present embodiment 2, on the basis that the structure of embodiment 1 is substantially constant, low voltage electric network power supply unit 18 directly accesses the low-voltage power of local power grid or power supply, low voltage electric network power supply unit 18 three-phase output end is directly connected by three-phase line the three-phase input end of the power winding 4 connecting high-power brushless double-fed motor after the first contactor 1, and another group three-phase output end of low voltage electric network power supply unit 18 keeps exporting low-voltage power to full-bridge rectification unit 15 simultaneously.
Embodiment 1 is applicable to the speed regulating control of more than 1000kw high-power brushless double-fed motor, the speed regulating control that embodiment 2 is applicable to high-power brushless double-fed motor between 300kw-1000kw adopts, control power and only have 30% of motor maximum power, cost is low has stronger economic feasibility.
As shown in Figure 3, the present embodiment 3 comprises excitation controller 8, inversion unit 10, first current detecting unit 2, second current detecting unit 7, voltage detection unit 13, storage capacitor 11, PWM rectification unit 21, BOOST reactor 22, soft starting circuit 14, input switch 12, low voltage electric network power supply unit 18, transformer 19, high-voltage fence power supply unit 20, first contactor 1 and operation and display unit 9.Wherein, excitation controller 8, inversion unit 10, first current detecting unit 2, second current detecting unit 7, voltage detection unit 13 form excitation con-trol and inversion module 51, and excitation controller 8 comprises serial communication interface, general I/O interface 5 and special remote communication interface 6.
The three-phase incoming line of the power winding 4 of high-power brushless double-fed motor is connected after the first contactor 1 and is connected high-voltage fence power supply unit 20, by connection transformer 19 between high-voltage fence power supply unit 20 and low voltage electric network power supply unit 18, adaptive voltage of power, the three-phase output end of low voltage electric network power supply unit 18 connects the three-phase input end of input switch 12 by three-phase line, the three-phase output end of input switch 12 passes through three-phase line sequential series soft starting circuit 14 and is connected PWM rectification unit 21 three-phase input end after BOOST reactor 22, after the positive and negative DC bus series connection accumulation electric capacity 11 of PWM rectification unit 21 output, connect the positive and negative direct-flow input end of the inversion unit 10 of excitation con-trol and inversion module 51, the three-phase output end of inversion unit 10 connects the controlled winding 3 of high-power brushless double-fed motor by three-phase line, the current signal collection terminal M of the first current detecting unit 2 is connected on the three-phase line between the first contactor 1 and power winding 4, and the output of the first current detecting unit 2 is connected to the first signal input part of excitation controller 8, the current signal collection terminal M of the second current detecting unit 7 is connected on the three-phase line between inversion unit 10 and controlled winding 3, and the output of the second current detecting unit 7 is connected to the secondary signal input of excitation controller 8, the voltage signal acquisition end of voltage detection unit 13 is connected on the three-phase line between low voltage electric network power supply unit 18 and input switch 12, and the output of voltage detection unit 13 is connected to the 3rd signal input part of excitation controller 8, the pwm signal output of excitation controller 8 is connected with the pwm signal input of inversion unit 10.
As shown in Figure 4, in the present embodiment 4, on the basis that the structure of embodiment 3 is substantially constant, low voltage electric network power supply unit 18 directly accesses the low-voltage power of local power grid or power supply, low voltage electric network power supply unit 18 three-phase output end is directly connected by three-phase line the three-phase input end of the power winding 4 connecting high-power brushless double-fed motor after the first contactor 1, and another group three-phase output end of low voltage electric network power supply unit 18 keeps exporting low-voltage power to PWM rectification unit 21 simultaneously.
In above embodiment, the soft starting circuit 14 on every phase circuit is mainly used in closing as required, to reduce big current in motor start-up procedure, avoids electrical equipment impact damage equipment.
High-voltage fence power supply unit 20 is mainly used in accessing high-voltage fence and comprises 6KV, 10KV and other meets the high-voltage fence of low-pressure industrial electricity consumption; it mainly comprises primary cut-out, high voltage isolator and earthed switch, high voltage load switch, high pressure automatic reclosing and sectionalizer; several large classes such as high-voltage actuating mechanism, high-voltage explosion-proof power distribution equipment and high-tension switch cabinet, mainly play the effects such as break-make, control or protection.
Low voltage electric network power supply unit 18 is mainly used in accessing low voltage electric network and comprises 380V, 220V, 110V and other meets the low voltage electric network of low-pressure industrial electricity consumption, and it mainly includes the equipment of the parts such as low-voltage circuit breaker, Intelligent power distribution device, low-voltage distribution switch, fuse, transformer, earth leakage protective device.
Described transformer 19 can be the one in the multiple transformers such as combined transformer, dry-type transformer, oil-filled transformer, single-phase transformer; Connected mode between transformer 19 primary side and secondary side can be star-like angle type, angle-style angle type, star-like fandy star, angle-style fandy star.
Input switch 12 can be the one in the multiple switches such as air switch, chopper switch, air type electromagnetic contactor, vacuum contactor, semiconductor contactor or permanent magnet contactor.
First contactor 1 can be the one in air type electromagnetic contactor, vacuum contactor, semiconductor contactor, permanent magnet contactor.
Described BOOST reactor 22 is directly connected between PWM rectification unit 21 and soft starting circuit 14, or and non-capacitive element be connected between PWM rectification unit 21 and soft starting circuit 14.
Play in the regeneration processes such as brake unit 16 and the quick deceleration of brake resistance 17 more than the synchronous speed accelerating sections or synchronous speed of brushless double-fed motor and consume regenerative electric energy effect.
The effect of excitation controller 8 is Mathematical Modeling employing rotating speed, current double closed-loop control algolithm based on brushless dual-feed motor, utilizes the control strategies such as scalar control, direct torque control, vector control, fuzzy control, PID ANN Control to generate pwm control signal.It is the signal processing module of this high-power brushless double-fed motor variable frequency speed control system.
PWM rectification unit 21 can adopt the multiple devices such as silicon controlled rectifier (SCR), gate electrode capable of switching off device (GTO), power transistor (GTR), MOSFET (PowerMOSFET), igbt (IGBT), integrated gate commutated thyristor (IGCT), SGCT (SGCT) for the break-make modulation power semiconductor device of PWM copped wave.
Three-phase alternating current is converted to direct current by the mode of three phase bridge and delivers to positive and negative DC bus by the unilateral conduction that full-bridge rectification unit 15 make use of diode.
DC inverter on direct current positive and negative busbar, according to the given pwm signal (excitation signal) of excitation controller, is amplitude, frequency, three-phase alternating current that phase sequence is adjustable, and is supplied to the controlled winding 3 of high-power brushless double-fed motor by inversion unit 10.Break-make modulation power semiconductor device in inversion unit 10 also can adopt the multiple devices such as silicon controlled rectifier (SCR), gate electrode capable of switching off device (GTO), power transistor (GTR), MOSFET (PowerMOSFET), igbt (IGBT), integrated gate commutated thyristor (IGCT), SGCT (SGCT).
Excitation controller 8 passes through serial communication interface attended operation and display unit 9 and the first contactor 1, I/O interface 5 for connecting LMT Local Maintenance Terminal, or uploads download-maintenance data etc., and remote communication interface 6 is for carrying out data cube computation with wide area network.Serial communication mode can be the one in the communication modes such as Canbus communication, Modbus communication, RS485 communication, RS232 communication.Its effect is responsible for operation to carry out communication with display unit 9 and excitation controller 8, and for the optimum configurations of system, parameter display is as output voltage, output frequency, power output etc.Or be responsible for other controlled cells such as the first contactor 1 and excitation controller 8 carries out communication, for controlling the start and stop of first other controlled cells such as contactor 1 grade.
I/O interface 5 also can be the communication modes interfaces such as Canbus communication, Modbus communication, RS485 communication, RS232 communication, or direct control terminal, participates in the control to excitation controller 8.
Remote communication interface 6 can be the wired or wireless interface of wide area network, carries out telecommunication and control by the mode of wired or wireless communication to excitation controller 8.
Soft starting circuit 14 comprises two-phase soft start and single-phase soft start two kinds of structure types in embodiment 1.
Soft starting circuit 14 comprises three-phase soft start and two-phase soft start two kinds of structure types in embodiment 3.
The effect of described soft starting circuit 14 can close switch in soft starting circuit on demand to reduce the big current in motor start-up procedure, avoids electrical impact to damage equipment.
The first described current detecting unit 2 is Hall current sensor, its connected mode is according to Hall base husband current law iu+iv+iw=0, as long as so measure the electric current of any two-phase on three-phase AC line, just can calculate third phase size of current, therefore at this, the connected mode of current sensor can be selected employing two Hall current sensors to carry out two to be connected, three Hall current sensors also can be adopted all to be connected by three-phase.
Described storage capacitor 11 can be furnished with the one in the Various Components such as battery pack, super capacitor, high-energy capacitor, electrochemical capacitor, lead acid accumulator, nickel-cadmium cell, Ni-MH battery, flow battery, sodium-sulphur battery, lithium ion battery of DC/DC conversion.
As shown in Figure 5, the key step utilizing embodiment 1 or 2 to carry out the method for high-power brushless double-fed motor speed regulating control (sequential) comprises:
S100, closed input switch 12, soft starting circuit 14 works, and system judges whether the voltage on storage capacitor 11 reaches operating point.
If after the voltage on s110 storage capacitor 11 does not reach operating point, then soft starting circuit 14 discharges, and display that system is under-voltage is shut down, and re-starts judgement;
If after the voltage on s120 storage capacitor 11 reaches operating point, then soft starting circuit 14 closes;
S200, voltage detection unit 13 detect the change in voltage on the three-phase line between low voltage electric network power supply unit 18 and input switch 12 by voltage signal acquisition end, image data is sent to excitation controller 8, excitation controller 8 carries out phase-locked process to its frequency and phase place;
S300, by I/O interface 5, remote communication interface 6, operation and display unit 9 pairs of excitation controllers 8 carry out the operations such as control command, frequency, sampling; After receiving action command, excitation controller 8, according to the frequency of electrical network and phase place, sends the output voltage of same frequency and antiphase from pwm signal output;
S400, after time delay a period of time, closed first contactor 1, high-power brushless double-fed motor is in zero-speed running status;
After s500, end time delay, excitation controller 8 runs according to the frequency set and Acceleration and deceleration time; The curent change of the different winding of brushless double-fed motor is detected by the first current detecting unit 2 and the second current detecting unit 7; And controlled by operation and display unit 9, general purpose I/O interface 5 or remote communication interface 6;
S600, after excitation controller 8 receives halt command, according to deceleration time, first decelerate to zero-speed, then control disconnection first contactor 1 by the control input end of the first contactor 1, after time delay, then close excitation export.
By this Control timing sequence and method, brake unit 16 is in zero-speed to synchronous speed accelerating sections, or the regeneration processes such as more than synchronous speed quick deceleration works.Make frequency conversion speed-adjusting system of the present invention be applicable to the load of long-time running more than synchronous speed, below synchronous speed, only carry out the occasion of acceleration and deceleration.
As shown in Figure 6, the key step utilizing embodiment 3 or 4 to carry out the method for high-power brushless double-fed motor speed regulating control (sequential) comprises:
S10, closed input switch 12, soft starting circuit 14 works, and system judges whether the voltage on storage capacitor 11 reaches operating point;
If after the voltage on s11 storage capacitor 11 does not reach operating point, then soft starting circuit 14 discharges, and display that system is under-voltage is shut down, and re-starts judgement;
If after the voltage on s12 storage capacitor 11 reaches operating point, then soft starting circuit 14 closes;
S20, voltage detection unit 13 detect the change in voltage on the three-phase line between low voltage electric network power supply unit 18 and input switch 12 by voltage signal acquisition end, image data is sent to excitation controller 8, excitation controller 8 carries out phase-locked process to its frequency and phase place, and PWM rectification unit 21 is started working;
S30, by I/O interface 5, remote communication interface 6, operation and display unit 9 pairs of excitation controllers 8 carry out the operations such as control command, frequency, sampling; After receiving action command, excitation controller 8, according to the frequency of electrical network and phase place, sends the output voltage of same frequency and antiphase from pwm signal output;
S40, after time delay a period of time, closed first contactor, motor is in zero-speed running status;
After s50, end time delay, excitation controller 8 runs according to the frequency set and Acceleration and deceleration time; The curent change of the different winding of brushless double-fed motor is detected by the first current detecting unit 2 and the second current detecting unit 7; And controlled by operation and display unit 9, general purpose I/O interface 5 or remote communication interface 6;
S60, after excitation controller 8 receives halt command, according to deceleration time, first decelerate to zero-speed, then control disconnection first contactor 1 by the control input end of the first contactor 1, after time delay, then close excitation export.
This Control timing sequence and method are more suitable for the frequent feed speed control to high-power brushless double-fed motor rotating speed, also the rotating speed control that high-power brushless double-fed motor rotating speed runs for a long time below synchronous speed is applicable to, can make regenerated energy feedback power grid, efficiency is higher.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection range that claims of the present invention determines.
Claims (2)
1. the control method utilizing high-power brushless double-fed motor variable frequency speed control system to carry out frequency control, described high-power brushless double-fed motor variable frequency speed control system, comprise power winding and the controlled winding of high-power brushless double-fed motor, also comprise the first contactor, input power power supply unit, input switch, soft starting circuit, alternating current-direct current rectification unit, storage capacitor, operation and display unit, and by excitation controller, inversion unit, first current detecting unit, second current detecting unit, the excitation con-trol of voltage detection unit composition and inversion module,
The three-phase incoming line of described power winding is connected and is connected a three-phase output end of described input power power supply unit after the first contactor, another three-phase output end of described input power power supply unit connects the three-phase input end of described input switch by three-phase line, the three-phase output end of described input switch connects the three-phase input end of described alternating current-direct current rectification unit by three-phase line, after storage capacitor described in the positive and negative DC bus sequential series of described alternating current-direct current rectification unit output, connect the positive and negative direct-flow input end of described inversion unit, the three-phase output end of described inversion unit connects described controlled winding by three-phase line, on circuit between the three-phase output end that described soft starting circuit is connected on described alternating current-direct current rectification unit and described input switch, or on the circuit being connected between described alternating current-direct current rectification unit and storage capacitor, described operation and carry out data cube computation by serial communication mode between display unit and described excitation controller,
Described excitation controller gathers the curent change of three-phase line between described power winding and the first contactor by described first current detecting unit, the curent change of three-phase line between controlled winding and described inversion unit is gathered by described second current detecting unit, gathered the change in voltage of three-phase line between described input switch and described input power power supply unit by described voltage detection unit, and generate the control signal of described first contactor of control and generate the pwm signal controlling described inversion unit and export;
Described alternating current-direct current rectification unit is full-bridge rectification unit (15), also comprise brake unit (16) and brake resistance (17), described soft starting circuit (14) is connected on the DC bus between full-bridge rectification unit (15) output and described storage capacitor (11), described brake unit (16) in parallel on positive and negative DC bus between described soft starting circuit (14) and described storage capacitor, described brake unit (16) described brake resistance (17) in parallel;
It is characterized in that comprising the following steps:
S100, closed input switch (12), soft starting circuit (14) works, and system judges whether the voltage on storage capacitor (11) reaches operating point;
If after the voltage on s110 storage capacitor (11) does not reach operating point, then soft starting circuit (14) release, display that system is under-voltage is shut down, and re-starts judgement;
If after the voltage on s120 storage capacitor (11) reaches operating point, then soft starting circuit (14) closes;
S200, voltage detection unit (13) detect the change in voltage on the three-phase line between low voltage electric network power supply unit (18) and input switch (12) by voltage signal acquisition end, image data is sent to excitation controller (8), excitation controller (8) carries out phase-locked process to its frequency and phase place;
S300, by I/O interface (5) or remote communication interface (6) or operation and display unit (9), excitation controller (8) to be controlled; After receiving action command, excitation controller (8), according to the frequency of electrical network and phase place, sends the output voltage of same frequency and antiphase from pwm signal output;
S400, after time delay a period of time, closed first contactor (1), high-power brushless double-fed motor is in zero-speed running status;
After s500, end time delay, excitation controller (8) runs according to the frequency set and Acceleration and deceleration time; The curent change of the different winding of brushless double-fed motor is detected by the first current detecting unit (2) and the second current detecting unit (7); And controlled by operation and display unit (9) or general purpose I/O interface (5) or remote communication interface (6);
S600, after excitation controller (8) receives halt command; according to deceleration time; first decelerate to zero-speed, then control disconnection first contactor (1) by the control input end of the first contactor (1), after time delay, then close excitation export.
2. the control method utilizing high-power brushless double-fed motor variable frequency speed control system to carry out frequency control, described high-power brushless double-fed motor variable frequency speed control system, comprise power winding and the controlled winding of high-power brushless double-fed motor, also comprise the first contactor, input power power supply unit, input switch, soft starting circuit, alternating current-direct current rectification unit, storage capacitor, operation and display unit, and by excitation controller, inversion unit, first current detecting unit, second current detecting unit, the excitation con-trol of voltage detection unit composition and inversion module,
The three-phase incoming line of described power winding is connected and is connected a three-phase output end of described input power power supply unit after the first contactor, another three-phase output end of described input power power supply unit connects the three-phase input end of described input switch by three-phase line, the three-phase output end of described input switch connects the three-phase input end of described alternating current-direct current rectification unit by three-phase line, after storage capacitor described in the positive and negative DC bus sequential series of described alternating current-direct current rectification unit output, connect the positive and negative direct-flow input end of described inversion unit, the three-phase output end of described inversion unit connects described controlled winding by three-phase line, on circuit between the three-phase output end that described soft starting circuit is connected on described alternating current-direct current rectification unit and described input switch, or on the circuit being connected between described alternating current-direct current rectification unit and storage capacitor, described operation and carry out data cube computation by serial communication mode between display unit and described excitation controller,
Described excitation controller gathers the curent change of three-phase line between described power winding and the first contactor by described first current detecting unit, the curent change of three-phase line between controlled winding and described inversion unit is gathered by described second current detecting unit, gathered the change in voltage of three-phase line between described input switch and described input power power supply unit by described voltage detection unit, and generate the control signal of described first contactor of control and generate the pwm signal controlling described inversion unit and export;
Described alternating current-direct current rectification unit is PWM rectification unit (21), also comprise BOOST reactor (22), soft starting circuit (14) and described BOOST reactor (22) described in sequential series on the circuit between the three-phase output end and PWM rectification unit (21) of described input switch (12);
It is characterized in that comprising the following steps:
S10, closed input switch (12), soft starting circuit (14) works, and system judges whether the voltage on storage capacitor (11) reaches operating point;
If after the voltage on s11 storage capacitor (11) does not reach operating point, then soft starting circuit (14) release, display that system is under-voltage is shut down, and re-starts judgement;
If after the voltage on s12 storage capacitor (11) reaches operating point, then soft starting circuit (14) closes;
S20, voltage detection unit (13) detect the change in voltage on the three-phase line between low voltage electric network power supply unit (18) and input switch (12) by voltage signal acquisition end, image data is sent to excitation controller (8), excitation controller (8) carries out phase-locked process to its frequency and phase place, and PWM rectification unit (21) is started working;
S30, by I/O interface (5) or remote communication interface (6) or operation and display unit (9), excitation controller (8) to be controlled; After receiving action command, excitation controller (8), according to the frequency of electrical network and phase place, sends the output voltage of same frequency and antiphase from pwm signal output;
S40, after time delay a period of time, closed first contactor, motor is in zero-speed running status;
After s50, end time delay, excitation controller (8) runs according to the frequency set and Acceleration and deceleration time; The curent change of the different winding of brushless double-fed motor is detected by the first current detecting unit (2) and the second current detecting unit (7); And controlled by operation and display unit (9) or general purpose I/O interface (5) or remote communication interface (6);
S60, after excitation controller (8) receives halt command; according to deceleration time; first decelerate to zero-speed, then control disconnection first contactor (1) by the control input end of the first contactor (1), after time delay, then close excitation export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310105032.3A CN103138674B (en) | 2013-03-28 | 2013-03-28 | High-power brushless double-fed motor variable frequency speed control system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310105032.3A CN103138674B (en) | 2013-03-28 | 2013-03-28 | High-power brushless double-fed motor variable frequency speed control system and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103138674A CN103138674A (en) | 2013-06-05 |
| CN103138674B true CN103138674B (en) | 2015-11-11 |
Family
ID=48498082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310105032.3A Active CN103138674B (en) | 2013-03-28 | 2013-03-28 | High-power brushless double-fed motor variable frequency speed control system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103138674B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753279B (en) * | 2013-12-28 | 2017-12-01 | 黄劭刚 | AC frequency conversion senses single armature synchronous motor of brushless excitation |
| CN104064083B (en) * | 2014-06-20 | 2016-08-24 | 三垦力达电气(江阴)有限公司 | A kind of electrical network analog control system |
| CN104460503B (en) * | 2014-11-11 | 2017-02-15 | 武汉钢铁(集团)公司 | Alternating-current asynchronous motor excitation control method of strip steel leveling production line |
| CN105824267B (en) * | 2015-01-05 | 2019-02-15 | 沈阳新松机器人自动化股份有限公司 | A kind of intelligent power for robot servo driver |
| CN105471340A (en) * | 2015-12-31 | 2016-04-06 | 易事特集团股份有限公司 | Starting structure, starting method and starting device for brushless double-feed motor |
| CN106992723B (en) * | 2017-04-28 | 2023-12-08 | 广州亿智环保科技有限公司 | Brushless double-fed motor starting control device and method capable of realizing multi-mode operation |
| CN107093964B (en) * | 2017-05-19 | 2023-11-03 | 广东上水能源科技有限公司 | Brushless double-fed motor speed regulating device with three full-control converters and method |
| CN108462412A (en) * | 2018-03-09 | 2018-08-28 | 周顺新 | Brushless feedback electric-machine directly-driven intelligence control system |
| CN110011555B (en) * | 2019-05-10 | 2021-04-20 | 安徽大学 | Charging control method for direct-current side capacitor of diode-clamped three-level converter |
| CN113014159A (en) * | 2019-12-19 | 2021-06-22 | 丹东山川电机有限公司 | Motor starting method for testing performance of TYCD self-starting permanent magnet synchronous motor |
| CN111431461A (en) * | 2020-03-31 | 2020-07-17 | 江苏理工学院 | Permanent magnet synchronous electric main shaft direct torque speed regulation method based on fuzzy control |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345464A (en) * | 2008-08-27 | 2009-01-14 | 北京清能华福风电技术有限公司 | Double-feed motor adopting AC-DC-AC current transformer for speed regulation and its start control method |
| CN101401294A (en) * | 2006-03-17 | 2009-04-01 | 英格蒂姆有限公司 | Dynamic electric brake for a variable speed wind turbine having an exciter machine and a power converter not connected to the grid |
| CN101917018A (en) * | 2010-07-28 | 2010-12-15 | 南京高传机电自动控制设备有限公司 | Combined control cabinet of large-power doubly-fed wind-driven generator |
| CN101931240A (en) * | 2010-08-26 | 2010-12-29 | 哈尔滨九洲电气股份有限公司 | Double-PWM vector control double-fed wind power converter |
| CN102064714A (en) * | 2010-12-02 | 2011-05-18 | 永济新时速电机电器有限责任公司 | Doubly-fed wind power frequency converter |
| CN102255588A (en) * | 2011-07-08 | 2011-11-23 | 大禹电气科技股份有限公司 | Variable-frequency speed regulating device |
| CN102868346A (en) * | 2012-08-16 | 2013-01-09 | 北京索德电气工业有限公司 | Brushless doubly-fed motor excitation control system and control method using same |
| CN203340017U (en) * | 2013-03-28 | 2013-12-11 | 北京索德电气工业有限公司 | Frequency control system for large-power brushless double-feed motor |
-
2013
- 2013-03-28 CN CN201310105032.3A patent/CN103138674B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101401294A (en) * | 2006-03-17 | 2009-04-01 | 英格蒂姆有限公司 | Dynamic electric brake for a variable speed wind turbine having an exciter machine and a power converter not connected to the grid |
| CN101345464A (en) * | 2008-08-27 | 2009-01-14 | 北京清能华福风电技术有限公司 | Double-feed motor adopting AC-DC-AC current transformer for speed regulation and its start control method |
| CN101917018A (en) * | 2010-07-28 | 2010-12-15 | 南京高传机电自动控制设备有限公司 | Combined control cabinet of large-power doubly-fed wind-driven generator |
| CN101931240A (en) * | 2010-08-26 | 2010-12-29 | 哈尔滨九洲电气股份有限公司 | Double-PWM vector control double-fed wind power converter |
| CN102064714A (en) * | 2010-12-02 | 2011-05-18 | 永济新时速电机电器有限责任公司 | Doubly-fed wind power frequency converter |
| CN102255588A (en) * | 2011-07-08 | 2011-11-23 | 大禹电气科技股份有限公司 | Variable-frequency speed regulating device |
| CN102868346A (en) * | 2012-08-16 | 2013-01-09 | 北京索德电气工业有限公司 | Brushless doubly-fed motor excitation control system and control method using same |
| CN203340017U (en) * | 2013-03-28 | 2013-12-11 | 北京索德电气工业有限公司 | Frequency control system for large-power brushless double-feed motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103138674A (en) | 2013-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103138674B (en) | High-power brushless double-fed motor variable frequency speed control system and control method | |
| CN101710789B (en) | Megawatt-level permanent magnet direct-drive wind-force generating converter and control method | |
| CN202889279U (en) | Brushless doubly fed motor excitation control device | |
| CN102868346A (en) | Brushless doubly-fed motor excitation control system and control method using same | |
| CN103227477A (en) | High voltage ride through control method for double-fed wind generator | |
| CN203340017U (en) | Frequency control system for large-power brushless double-feed motor | |
| CN202633964U (en) | Energy-fed type traction substation and power supply system | |
| CN102946136B (en) | Circuit and method for switching from power frequency of high-voltage inverter to variable frequency without disturbance | |
| CN102709945B (en) | Energy-storage wind power generation system with squirrel-cage generator | |
| CN104604068A (en) | System and method for protecting electrical machines | |
| CN105226792A (en) | A kind of integrated energy feedback, the converter device of stored energy and emergency power supply function | |
| CN103023344A (en) | Universal smart grid power electronic device | |
| CN109406936B (en) | Alarm protection module for charging pile | |
| CN102244466A (en) | Voltage sag generator | |
| CN102709929B (en) | Wind power generation electric energy management based on flywheel energy storage, and storage device and method based on flywheel energy storage | |
| CN103016265B (en) | Alternating current pitch control system using electric network to drive emergency feathering | |
| CN103532444A (en) | Large-scale impact power generation device group frequency conversion starting device | |
| CN105162376A (en) | Doubly-fed wind turbine generator control method and generator | |
| CN203206170U (en) | Medium-and-small sized hydroelectric generating set intelligent control system | |
| CN101119088A (en) | Whole controlled energy feedback system | |
| CN202565218U (en) | Automatic control frequency conversion soft start device of medium-high voltage synchronous motor | |
| CN108123464A (en) | A kind of microgrid of energy-storage system takes over seamlessly control method | |
| CN115102205A (en) | Energy storage device for fast switching grid connection and grid disconnection by adopting anti-parallel thyristors and fast mechanical switches | |
| CN101252339A (en) | Polyphase electric machine variable frequency speed regulator | |
| CN104300573A (en) | Small and micro hydroelectric generating set and comprehensive control device thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |