CN101257268B - Electric motor controller and control method - Google Patents
Electric motor controller and control method Download PDFInfo
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- CN101257268B CN101257268B CN2007101919136A CN200710191913A CN101257268B CN 101257268 B CN101257268 B CN 101257268B CN 2007101919136 A CN2007101919136 A CN 2007101919136A CN 200710191913 A CN200710191913 A CN 200710191913A CN 101257268 B CN101257268 B CN 101257268B
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Abstract
The invention discloses a motor controller and a control method, which includes a control power supply connected to each module, a single-chip, a relay output module, a switching value input module, a watchdog module, and a keyboard input circuit. The invention is characterized in that the single-chip is respectively connected with a voltage mutual inductor and a current mutual inductor through a voltage filtering amplification module and a current filtering amplification module; the single-chip is respectively connected with a LCD display and a bus drive module through a data bus and a gating module; and the single-chip is also connected with a central control room computer through a communicating interface module. The real time measurement is executed to the voltage and current of the motor loop through the current mutual inductor and a circuit line voltage, and accurate and quick protection is carried out the motor defects such as over loading, locked-rotor, open-phase, light loading, three phase disbalance, earth/electrical leakage, undervoltage, over pressure, etc.; the direct, reversible, star/triangular starting up of the motor are realize with conjunction of exterior circuit, and the communication network carries out centralized monitoring to a plurality of motors distributed at different positions.
Description
Technical field
The claimed technical scheme of the present invention relates to a kind of motor controller and control method.
Background technology
At present, in the Motor Control field, soft starter, frequency converter, motor controller and traditional thermal relay are also deposited.The thermal relay defencive function is single, adjusts, sets inaccurate and be not with communication function; Soft starter biases toward the motor start-up process, is mainly used in blower fan, and the load of the pumps torque becomes the occasion of quadratic relationship with rotating speed; The speed governing of frequency converter, control, defencive function are strong, but the price height, soft starter simultaneously, and the use of frequency converter or what are caused certain pollution to electrical network.
Summary of the invention
Technical problem to be solved by this invention is; a kind of motor controller and control method are provided; to reach motor is realized directly; rotating; the control of star triangle start mode; and by sampling motor three-phase current; voltage signal; realize three-phase current; voltage effective value; mains frequency; active power; reactive power and power-factor measurement; according to measurement result motor is realized overload; electric leakage; the phase failure; three-phase imbalance; overvoltage; under-voltage and underloading is protected; by serial line interface and central control room computer realization communication function, the motor that is distributed in diverse location is carried out the purpose of centralized monitor by communication network.
For solving the problems of the technologies described above, technical scheme of the present invention is, a kind of motor controller, comprise the control power supply that is connected with each module, single-chip microcomputer () with A/D analog to digital conversion circuit, relay output module, switching input module, watchdog module, keyboard input circuit is characterized in that: described single-chip microcomputer is connected with voltage transformer, current transformer by voltage filter amplification module, current filtering amplification module respectively; And be connected with LCD display, bus driver module by data/address bus, gating module respectively; Described single-chip microcomputer also is connected with the central control room computer by communication interface module;
Described central control room computer is used for directly the motor controller of 127 the following stated being realized remote measurement, remote control, remote regulating, remote signalling function by communication network, communication interface module.
A kind of motor controller, described current transformer comprises threephase current transformer and zero sequence current mutual inductor.
Described threephase current transformer is that measuring range is the three-phase integrated formula current transformer of 10 rated values.
A kind of motor controller, described relay output module, switching input module are connected with single-chip microcomputer by photoelectric isolation module.
A kind of motor controller, described single-chip microcomputer model is 80C196KC; The communication interface module model is MAX487.
The another kind of technical scheme of the present invention is a kind of motor controller control method, described director demon flow performing the following step;
A) beginning step; Controller powers on, and forbids all interruptions, and time-delay makes the device reliable reset; B) initialization step is used for each functional module initialization, RAM zero clearing, the packing into of set point protection value; C) self check determining step is used for controller self check CPU, NRAM, and LCD and external contactor wiring judge whether controller has fault, if shut down and demonstration self check fault; If not, enter the external interrupt step; D) the external interrupt step is used for key response; The communicating interrupt step; E) communicating interrupt step is used to receive host computer order and response, execute the communicating interrupt step after, the entry communication service subprogram; F) button interrupt step, be used to read key, efficiency confirmed key, execute the button interrupt step after, enter parameter step be set, g) parameter is provided with step and is used to the station number of communicating by letter, motor starting system, setting value, the setting of protection value and control mode, h) set up procedure is used for by parameter the motor starting system motor starting that step is set being set; I) determining step is used to judge whether adhesive of contactor, if not, enters the shutdown determining step, judges whether to shut down, if enter the shutdown step; If, entering signal sampling and treatment step; J) signal sampling and treatment step, the analog signal that is used for importing according to voltage transformer, current transformer conversion are through preliminary treatment, and after the A/D conversion, the algorithm computation that CPU utilizes a cover single-chip microcomputer to carry out again goes out electric current, voltage, the isoparametric value of power; K) fault judgement step is used for calculating electric current, voltage, the isoparametric value of power according to signal sampling and treatment step and judges whether motor has fault, if, enter the troubleshooting subprogram, if not, enter the demonstration determining step; L) troubleshooting subprogram is used for judging fault type according to measured value with failure criterion, and makes respective handling; M) show determining step, be used to judge whether demonstration, if not, program will enter and show service subprogram and inverse signal sampling and treatment step; If, entry communication treatment step then; N) communication treatment step (115) is used for controlling and data processing by the host computer command execution on the one hand, is that host computer is prepared reply data on the other hand; O) button treatment step is used for the content according to key, carries out correspondingly operation, execute the button treatment step after, inverse signal sampling and treatment step.
A kind of motor controller control method, described troubleshooting subprogram comprises the following step;
P) data processing step is used for sampled data is handled; Q) stall determining step, be used for according to sampled data, judge whether stall of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, if do not enable the satisfied earth leakage determining step that directly enters of rotation-clogging protection function or condition, satisfy as if the rotation-clogging protection condition, select to stop or the warning processing according to the fault executive mode; R) earth leakage determining step, be used for according to sampled data, judge whether earth leakage of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, if do not enable the satisfied overload determining step that directly enters of earth-leakage protection or condition, satisfy as if the earth-leakage protection condition, select to stop or the warning processing according to the fault executive mode; S) overload determining step; Be used for according to sampled data, judge whether motor transships, if, program will enter protection successively and drop into determining step, warning mark determining step, is limited to not determining step, alarm decision step inverse time, if do not enable the satisfied current imbalance determining step that directly enters of overload protection or condition, if the overload protection condition satisfies, select to stop or report to the police and handle according to the fault executive mode; T) current imbalance determining step, be used for data according to sampling, judge whether earth leakage of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, if do not enable the satisfied overvoltage determining step that directly enters of current imbalance protection or condition, satisfy as if the current imbalance protective condition, select to stop or the warning processing according to the fault executive mode; U) overvoltage determining step; Be used for according to sampled data, judge whether overvoltage of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, if do not enable the satisfied under voltage determining step that directly enters of overvoltage protection or condition, if the overvoltage protection condition satisfies, select to stop or report to the police and handle according to the fault executive mode; V) under voltage determining step, be used for according to sampled data, judge whether under voltage of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, if do not enable the satisfied underloading determining step that directly enters of under voltage protection or condition, satisfy as if the under voltage protection condition, select to stop or the warning processing according to the fault executive mode; W) underloading determining step; Be used for according to sampled data; judge whether underloading of motor; if; program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step; underloading protection or condition are satisfied directly carries out the trouble lamp refresh step if do not enable, and withdraws from the fault judgement program, the return data treatment step; if the underloading protective condition satisfies, select to stop or report to the police and handle according to the fault executive mode.
The controller control method is inversely proportional to (I 〉=1.1Is is judged as overload) square number and the operate time of the overload current I when being provided with the corresponding 1.2Is of 16 kinds of overload protection inverse time lag curves (K=0-15) (setting electric current) in the described overload determining step.
A kind of motor controller and control method owing to adopt said structure and control method, have the following advantages; (1) replaces electric current, voltmeter, display lamp, button, the time relay, thermal relay.(2) three-phase integrated formula current transformer, measuring range reaches 10 times of rated values, 0.5 grade of certainty of measurement.(3) communication network is realized remote measurement, remote control, remote regulating, remote signalling function; Need not repeater, the communication interface support is 127 slaves interconnection nearly.(4) diagnostic function: to self, circuit breaker, the working state monitoring of contactor.(5) failure logging; Write down nearest No. 8 scram reasons, outage resets and does not lose.Article (6) 16, the overload protection curve can satisfy the requirement of multiple motor; Utilize the current imbalance rate, realize the accurate protection of the line broken circuit and the single-phase winding phase failure of motor.(7) kinds of protect function is thrown by actual needs and to be moved back; Executive mode is reported to the police, and it is optional to stop; Delay time can be set.Protection about 10ms of response time.(8) electric leakage/ground protection can adopt the internal current vector to add up to calculation, also can adopt to add the electric leakage mutual inductor sample.This motor controller is applicable to frequency 50Hz, and rated current is smaller or equal to 630A, the threephase asynchronous loop of the following electric pressure of AC660V.Current transformer by special use and a route voltage are to the voltage of motor circuit, electric current, measure in real time, through 16 single-chip microcomputers measured value and protection set point are compared the real time execution situation of judging motor, to motor transship, faults such as stall, the phase failure, underloading, three-phase imbalance, ground connection/electric leakage, under-voltage, overvoltage accurately, protection fast; Cooperate external circuit, realize the starting of the modes such as direct, reversible, star triangle of motor, the multiple motors that is distributed in diverse location is carried out centralized monitor by communication network.
Description of drawings
Fig. 1 is a kind of motor controller structural representation of the present invention;
Fig. 2 is a sample circuit structural representation shown in Figure 1;
Fig. 3 is a keyboard input circuit structural representation shown in Figure 1;
Fig. 4 is a kind of motor controller communication of the present invention block diagram;
Fig. 5 is a kind of motor controller control program of the present invention flow chart;
Fig. 6 is a troubleshooting subroutine flow chart shown in Figure 5;
Fig. 7 is a kind of motor controller overload protection of the present invention curve chart;
In Fig. 1 ~ Fig. 4,1, single-chip microcomputer, 2, the voltage filter amplification module, 3, the current filtering amplification module, 4, voltage transformer, 5, threephase current transformer, 6, zero sequence current mutual inductor, 7, communication interface module, 8, the keyboard input circuit, 9, encoder, 10, data/address bus, 11, LCD display, 12, the bus driver module, 13, watchdog module, 14, the gating module, 15, relay output module, 16 switching input modules, 17, photoelectric isolation module, 18, computer.
Embodiment
Contrast accompanying drawing below, by description to embodiment, to the effect of the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, the each several part and annexation, each several part and operation principle, control method etc., be described in further detail, inventive concept of the present invention, technical scheme had more complete, accurate and deep understanding to help those skilled in the art.
As Fig. 1, shown in Figure 4, a kind of motor controller comprises the control power supply that is connected with each module, has the single-chip microcomputer 1 of A/D analog to digital conversion circuit, and single-chip microcomputer 1 model is 80C196KC; Relay output module 15, switching input module 16, watchdog module 13, keyboard input circuit 8, described single-chip microcomputer 1 are connected with voltage transformer 4, current transformer by voltage filter amplification module 2, current filtering amplification module 3 respectively; And be connected with light-emitting diode display 11, bus driver module 12 by data/address bus 10, gating module 14 respectively; Described single-chip microcomputer 1 also is connected with central control room computer 18 by communication interface module 7; Communication interface module 7 models are MAX487.Described central control room computer 18 is used for directly the motor controller of 127 the following stated being realized remote measurement, remote control, remote regulating, remote signalling function by communication network, communication interface module 7.Computer 18 passes through the RS485 physical interface with motor controller, follows MODBUS communication protocol.Maximum transmission rate 19200bps, transmission range can reach 1200m.A computer 18 can directly communicate with 127 slaves (motor controller), adds repeater and can extend to 247.Current transformer comprises threephase current transformer 5 and zero sequence current mutual inductor 6.Threephase current transformer 5 is the three-phase integrated formula current transformer of 10 rated values for measuring range.Relay output module 15, switching input module 16 are connected with single-chip microcomputer 1 by photoelectric isolation module 17.
Referring to Fig. 2, the sample rate current signal: by special three-phase integrated current transformer 5 (can measure 10 times of In rated current) sampling, through voltage, current conversion, three-phase signal divides 3 the tunnel: measure 3 road MIa, MIb, MIc; Protect 3 road PIa, PIb, PIc; Three phasor1s and ground connection/electric leakage Ig; The measurement range is 0～2In; The protection range is 2～10In.Take into account measurement simultaneously, protection value precision.Ground connection/electric leakage signal: three phasor1s and ground connection/electric leakage Ig or add zero sequence current mutual inductor input, both select one.Sampled voltage signal: the AC line voltage U ac of voltage transformer 4.More than 8 road signals after conditioning is amplified, convert the analog signal that the built-in AD of single-chip microcomputer is suitable for to, detect the motor circuit current/voltage in real time by single-chip microcomputer 1 program again, reach detection, the purpose of protection motor.
Motor controller requires to finish in the power frequency period (20ms) sampling of three-phase current, voltage.Therefore sampling process can only be carried out as follows: per 1 the tunnel samples in one-period, and (16 points are selected in sampling number N 〉=12 of a phase voltage or a cycle of electric current, this device to N, change by A/D, obtain N instantaneous value, deposit internal memory successively in, intact until 8 drive tests, record the 8N value altogether.Ask for parameters of electric power: obtain voltage, current effective value according to root mean square calculation formula (discrete effective value).Finish the collection of signal, handle.
Button is handled; When all can running into contact shake and operation, the keyboard input of any kind of presses the phenomenons such as misoperation of unnecessary button.In singlechip computer system, now mostly adopt KYBD/display-interface chip 8279 to solve above problem.But the volume of 8279 chips big (40 pin) own, many and long with the cpu i/f line, if this device adopts 8279 chips, because mainboard and keyboard input are two independently feature boards with display panel, increase the wiring volume so on the one hand, caused interference on the other hand easily.Therefore, motor controller has designed keyboard input as shown in Figure 3.The response of keyboard input is to handle in the mode of external interrupt, reads key and reads encoder 9 exactly.It realizes that principle is: when a key is pressed in K1 ~ K7, this button place becomes low level, this signal is leaded up to 74HC30 (8 input nand gate) and is caused external interrupt, the P0 mouth of single-chip microcomputer 1 (80C196KC) is imported on another road into by 74HC148 (encoder 9), CPU determines it is that button input by reading P0 mouth state, changes the respective keys handling procedure at last over to.If press two buttons simultaneously, encoder 9 is read for illegal input, is not handled.8 end input nand gates and encoder 9 all have pooling feature, eliminated the jitter problem of key input like this, makes the keyboard input not only simply but also reliable.
Motor controller will be finished the function of measurement, control, protection, communication, and it is inoperable that hardware configuration is only arranged, and also needs the software systems of a cover complete function to be driven.Motor controller is equivalent to discrete component, by communication conductor it is formed communication network by host computer.Therefore motor controller software divides slave computer software (motor controller software) and upper computer software two parts.Primary study slave computer software of the present invention.
Motor controller functional requirement and hardware configuration have determined the implementation of software.Motor controller software work process is: the single-chip microcomputer electrification reset, initialization, finish self check (external cabling, self hardware) after, motor is started by predefined mode; After the motor operation, by the voltage signal process preliminary treatment that the instrument transformer conversion obtains, the A/D conversion becomes the digital signal that CPU can handle, and CPU finishes the measurement of parameter according to software algorithm; Compare with measured value and protection setting value again,, motor is protected if exceed, otherwise the measurement that circulates; Communication is sent by host computer, and motor controller is as a communication unit passive response.From functional requirement, the work order of single-chip microcomputer source has two, and one is the keyboard input; Another is host computer communication.In order to improve execution speed, interrupt mode is all adopted in this two parts response.The software function that the motor watch-dog should possess has;
Parameter is provided with: communication station number, motor starting system, setting value, the setting of protection value and control mode.
Signal sampling and processing: through preliminary treatment, after the A/D conversion, the algorithm computation that CPU utilizes a cover single-chip microcomputer to carry out again goes out electric current, voltage, the isoparametric value of power by the analog signal of instrument transformer conversion input.
Troubleshooting: according to measured value, judge fault type, and make respective handling with failure criterion.
Show and communication: with main many communication network communications from formula, the main website requirement, slave station is passive response.The content displayed real-time is less demanding, and singlechip CPU has idle just demonstration.
Because protection requires the real-time height, so troubleshooting also adopts interrupt mode, and be superior to communication disruption and the keyboard input is interrupted.
Referring to Fig. 5, Fig. 5 is a kind of motor controller control program of the present invention flow chart; Single-chip microcomputer storage control program in the described controller, control program comprises execution the following step; A) beginning step 100; Controller powers on, and forbids all interruptions, and time-delay makes the device reliable reset,
B) initialization step 101, are used for each functional module initialization, RAM zero clearing, the packing into of set point protection value.
C) the self check determining step 102, are used for the controller self check, are used for controller self check CPU, NRAM, LCD and external contactor wiring judge whether controller has fault, if, enter shutdown determining step 116 and judge whether to shut down, if enter and shut down step 118; If not, enter external interrupt step 103; D) external interrupt step 103 after being used for key response and executing external interrupt step 103, enters button interrupt step (104), communicating interrupt step 105.E) communicating interrupt step 105 is used to receive host computer order and response, execute communicating interrupt step (105) after, entry communication service subprogram 107; F) button interrupt step (104), be used to read key, efficiency confirmed key, execute button interrupt step 104 after, enter parameter step 106 be set, g) parameter is provided with step 106 and is used to the station number of communicating by letter, motor starting system, setting value, the setting of protection value and control mode, h) set up procedure 108, are used for by parameter the motor starting system motor starting that step 106 is set being set; I) determining step 109, are used to judge whether adhesive of contactor, if not, enter and shut down determining step 116, judge whether to shut down, if enter and shut down step 118; If, entering signal sampling and treatment step 110; J) signal sampling and treatment step 110, the analog signal that is used for importing according to voltage transformer, current transformer conversion are through preliminary treatment, and after the A/D conversion, the algorithm computation that CPU utilizes a cover single-chip microcomputer to carry out again goes out electric current, voltage, the isoparametric value of power; K) fault judgement step (111) is used for calculating electric current, voltage, the isoparametric value of power according to signal sampling and treatment step 110 and judges whether motor has fault, if, enter troubleshooting subprogram 112, if not, enter and show determining step 113; L) the troubleshooting subprogram 112, are used for judging fault type according to measured value with failure criterion, and make respective handling.M) show determining step 113, be used to judge whether demonstration, if not, program will enter and show service subprogram 114 and inverse signal sampling and treatment step 110; If then the entry communication treatment step 115; N) the communication treatment step 115, are used for controlling and data processing by the host computer command execution on the one hand, are that host computer is prepared reply data on the other hand; O) the button treatment step 117, are used for the content according to key, carry out correspondingly operation, execute button treatment step 117 after, inverse signal sampling and treatment step 110.
Described troubleshooting subprogram 112 adopts interrupt mode, and is superior to communication disruption and button input interruption.
Which kind of fault is how operating motor differentiated it and is in malfunction, is? therefore to protect at first motor and need set up failure criterion.With single-chip microcomputer protection motor is with correctly, and the state of motor that forms a prompt judgement is a prerequisite.Voltage when split-phase motor breaks down, the feature of current signal, reenacting out can be for the fault distinguishing scheme of single-chip microcomputer acceptance.The major failure that takes place during the motor operation has: short circuit, and overload, current imbalance, the phase failure, ground connection/electric leakage is under-voltage etc.
Referring to Fig. 6, Fig. 6 is a troubleshooting subroutine flow chart shown in Figure 5; Described troubleshooting subprogram comprises the following step; P) data processing step 200, are used for the data of fault are handled; Q) the stall determining step 201, be used for data according to fault, judge whether stall of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, and enter earth leakage determining step 202 according to judged result, alarm decision step judged result is for denying, then enter failure logging step 208, parking step 209 successively, show scram step 211, if enter and enter earth leakage determining step 202 after putting the warning mark step; R) the earth leakage determining step 202, be used for data according to fault, judge whether earth leakage of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, and according to judged result enter the overload determining step 203, alarm decision step judged result is for denying, then enter failure logging step 208, parking step 209 successively, show scram step 211, if enter to put and enter overload determining step 203 after the warning mark step; S) overload determining step 203; Be used for data according to fault, judge whether motor transships, if program will enter protection successively and drop into determining step, warning mark determining step, is limited to not determining step, alarm decision step inverse time, and enter current imbalance determining step 204 according to judged result; Alarm decision step judged result then enters failure logging step 208, parking step 209 successively, shows scram step 211 for not, if enter and enter current imbalance determining step 204 after putting the warning mark step; T) the current imbalance determining step 204, be used for data according to fault, judge whether earth leakage of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, and enter overvoltage determining step 205 according to judged result; Alarm decision step judged result then enters failure logging step 208, parking step 209 successively, shows scram step 211 for not, if enter and enter overvoltage determining step 205 after putting the warning mark step; U) the overvoltage determining step 205; Be used for data according to fault, judge whether earth leakage of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, and enter under voltage determining step 206 according to judged result; Alarm decision step judged result then enters failure logging step 208, parking step 209 successively, shows scram step 211 for not, if enter and enter under voltage determining step 206 after putting the warning mark step; V) the under voltage determining step 206, be used for data according to fault, judge whether earth leakage of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, and enter underloading determining step 207 according to judged result; Alarm decision step judged result then enters failure logging step 208, parking step 209 successively, shows scram step 211 for not, if enter and enter underloading determining step 207 after putting the warning mark step; W) the underloading determining step 207; Be used for data according to fault; judge whether earth leakage of motor; if; program will enter protection successively and drop into determining step; the warning mark determining step; the time-delay determining step; delaying time to denys determining step; the alarm decision step; and enter alarm lamp refresh step 210 according to judged result; alarm decision step judged result is for denying; then enter failure logging step 208 successively; parking step 209; show scram step 211; if; enter and enter trouble lamp refresh step 210 after putting the warning mark step, execute alarm lamp refresh step 210 back return data treatment steps 200.
Referring to Fig. 7, Fig. 7 is a kind of motor controller overload protection of the present invention curve chart; See the following form 1 the operate time during the corresponding 1.2Is of 16 kinds of overload protection inverse time lag curves (K=0-15) (setting electric current); Overload current I square is inversely proportional to (I 〉=1.1Is is judged as overload) with operate time, and overload magnification (N) concerns operate time sees Fig. 7, has reflected anti-time limit characteristic among Fig. 7, and coordinate parameter spacing is not represented by actual ratio.
The operate time of table 1 1.2Is over-load inverse time-lag curve
| Curve K | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Time |
1 4 | 2 2 | 3 3 | 5 6 | 8 3 | 1 11 | 1 39 | 1 81 |
| |
8 | 9 | 1 0 | 1 1 | 1 2 | 1 3 | 1 4 | 1 5 |
| Time |
2 51 | 2 90 | 5 57 | 8 36 | 1 115 | 1 394 | 1 672 | 1 812 |
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or design of the present invention and technical scheme are directly applied to other occasion without improving, all within protection scope of the present invention.
Claims (3)
1. motor controller, comprise the control power supply that is connected with each module, single-chip microcomputer (1) with A/D analog to digital conversion circuit, relay output module (15), switching input module (16), watchdog module (13), keyboard input circuit (8), described single-chip microcomputer (1) are connected with voltage transformer (4), current transformer by voltage filter amplification module (2), current filtering amplification module (3) respectively; And be connected with LCD display (11), bus driver module (12) by data/address bus (10), gating module (14) respectively; Described single-chip microcomputer (1) also is connected with central control room computer (18) by communication interface module (7); Described central control room computer, be used for directly the motor controller of 127 the following stated being realized remote measurement, remote control, remote regulating, remote signalling function by communication network, communication interface module (7), it is characterized in that: single-chip microcomputer storage control program in the described motor controller, the control method of described motor controller comprises execution the following step;
A) beginning step (100); Controller powers on, and forbids all interruptions, and time-delay makes the device reliable reset;
B) initialization step (101) is used for each module initialization, RAM zero clearing, the packing into of set point protection value;
C) self check determining step (102) is used for controller self check single-chip microcomputer, NRAM, and LCD and external contactor wiring judge whether controller has fault, if enter shutdown determining step (116) and judge whether to shut down, if enter and shut down step (118); If not, enter external interrupt step (103);
D) external interrupt step (103) is used for key response, execute external interrupt step (103) after, enter button interrupt step (104), communicating interrupt step (105);
E) communicating interrupt step (105) is used for, and is used to receive host computer order and response, execute communicating interrupt step (105) after, entry communication service subprogram (107);
F) button interrupt step (104) is used to read key, efficiency confirmed key, execute button interrupt step (104) after, enter parameter step (106) be set,
G) parameter is provided with step (106) and is used to the station number of communicating by letter, motor starting system, and setting value, the setting of protection value and control mode,
H) set up procedure (108) is used for by parameter the motor starting system motor starting that step (106) is set being set;
I) determining step (109) is used to judge whether adhesive of contactor, if not, enters and shuts down determining step (116), judges whether to shut down, if enter and shut down step (118); If, entering signal sampling and treatment step (110);
J) signal sampling and treatment step (110), the analog signal that is used for importing according to voltage transformer, current transformer conversion are through preliminary treatment, and after the A/D conversion, the algorithm computation of utilizing a cover single-chip microcomputer to carry out again goes out the value of electric current, voltage, power parameter;
K) fault judgement step (111), the value that is used for calculating according to signal sampling and treatment step (110) electric current, voltage, power parameter judges whether motor has fault, if enter troubleshooting subprogram (112), if not, enter demonstration determining step (113);
L) troubleshooting subprogram (112) is used for judging fault type according to measured value with failure criterion, and makes respective handling;
M) show determining step (113), be used to judge whether demonstration, if not, program will enter and show service subprogram (114) and inverse signal sampling and treatment step (110); If, entry communication treatment step (115) then;
N) communication treatment step (115) is used for controlling and data processing by the host computer command execution on the one hand, is that host computer is prepared reply data on the other hand;
O) button treatment step (117) is used for the content according to key, carries out correspondingly operation, execute button treatment step (117) after, inverse signal sampling and treatment step (110).
2. motor controller control method according to claim 1 is characterized in that: described troubleshooting subprogram adopts interrupt mode, and is superior to communication disruption and button input interruption.
3. motor controller control method according to claim 1 and 2 is characterized in that: described troubleshooting subprogram comprises the following step;
P) data processing step (200) is used for the data of sampling are handled;
Q) stall determining step (201), be used for according to sampled data, judge whether stall of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, if do not enable the satisfied earth leakage determining step (202) that directly enters of rotation-clogging protection function or condition, satisfy as if the rotation-clogging protection condition, select to stop or the warning processing according to the fault executive mode;
R) earth leakage determining step (202), be used for according to sampled data, judge whether earth leakage of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, if do not enable the satisfied overload determining step (203) that directly enters of earth-leakage protection or condition, satisfy as if the earth-leakage protection condition, select parking or the processing of reporting to the police according to the fault executive mode;
S) overload determining step (203); Be used for according to sampled data; judge whether motor transships; if; program will enter protection successively and drop into determining step, warning mark determining step, is limited to not determining step, alarm decision step inverse time, if do not enable overload protection or the satisfied current imbalance determining step that directly enters of condition
(204), if the overload protection condition satisfies, select to stop or report to the police and handle according to the fault executive mode;
T) current imbalance determining step (204), be used for data according to sampling, judge whether earth leakage of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, if do not enable the satisfied overvoltage determining step (205) that directly enters of current imbalance protection or condition, satisfy as if the current imbalance protective condition, select to stop or the warning processing according to the fault executive mode;
U) overvoltage determining step (205); Be used for according to sampled data, judge whether overvoltage of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, if do not enable the satisfied under voltage determining step (206) that directly enters of overvoltage protection or condition, if the overvoltage protection condition satisfies, select to stop or report to the police and handle according to the fault executive mode;
V) under voltage determining step (206), be used for according to sampled data, judge whether under voltage of motor, if, program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step, if do not enable the satisfied underloading determining step (207) that directly enters of under voltage protection or condition, satisfy as if the under voltage protection condition, select to stop or the warning processing according to the fault executive mode;
W) underloading determining step (207); Be used for according to sampled data; judge whether underloading of motor; if; program will enter protection successively and drop into determining step, warning mark determining step, time-delay determining step, delay time not determining step, alarm decision step; underloading protection or condition are satisfied directly carries out trouble lamp refresh step (210) if do not enable, and withdraws from the fault judgement program, return data treatment step (200); if the underloading protective condition satisfies, select to stop or report to the police and handle according to the fault executive mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101919136A CN101257268B (en) | 2007-12-22 | 2007-12-22 | Electric motor controller and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101919136A CN101257268B (en) | 2007-12-22 | 2007-12-22 | Electric motor controller and control method |
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| CN101257268A CN101257268A (en) | 2008-09-03 |
| CN101257268B true CN101257268B (en) | 2011-09-07 |
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| CN2007101919136A Expired - Fee Related CN101257268B (en) | 2007-12-22 | 2007-12-22 | Electric motor controller and control method |
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2007
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