CN100359334C - Electric machine operation state sensor and sensing method - Google Patents
Electric machine operation state sensor and sensing method Download PDFInfo
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- CN100359334C CN100359334C CNB021043604A CN02104360A CN100359334C CN 100359334 C CN100359334 C CN 100359334C CN B021043604 A CNB021043604 A CN B021043604A CN 02104360 A CN02104360 A CN 02104360A CN 100359334 C CN100359334 C CN 100359334C
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Abstract
The present invention discloses a sensing device and a sensing method for operation states of a motor, which has the advantages that a device using a motor, provided with a microcomputer and without motor rotation number sensing means of a motor rotation number sensing means or a hall sensor, etc., is added with and is replaced by a motor voltage sensing circuit, whether the operation state of the motor without a sensing means device is normal can be sensed, and the cost of motor rotation number sensing means is reduced.
Description
Technical field
The invention relates to electric machine operation state sensing device and cognitive method.
Background technology
General induction motor is an alternating current generator, is the AC motor with commutator, and only links power supply at the rotor of AC motor or a side of stator, carries out work by induction.
Motor provides the driving force of drive system.Microcomputer is built on the drive unit of motor, and control decision electric motor starting is whether motor ON/OFF signal.Hall element is arranged on the motor driver, the number of revolutions of perception motor.Whether number of revolutions by the Hall element perception detects electric motor starting.
In the washing machine of prior art, if do not have under the situation of rotation number perception means that can perception motor rotation number, microcomputer produces the ON/OFF signal of motor, inputs to motor.Even motor is subjected to the control of signal, operate as normal is whether also can not to grasp motor.When motor was provided with the perception means of Hall element etc., from microcomputer output and the open/close signal of control motor, by the pulse change of Hall element perception, microcomputer can be grasped whether operate as normal of motor.
But following problem points is arranged but in prior art: in motor rotation number cognitive method, when the perception means of Hall element etc. of perception motor rotation number are not set, even what method the motor rotation does not have to know whether normally rotation of motor yet; Even be provided with motor rotation number perception means, also need on motor rotation number perception means, drop into a lot of expenses.
Summary of the invention
In order to solve the problem that above-mentioned prior art exists, the purpose of this invention is to provide the method that to judge the motor normal operating conditions, replace motor rotation number perception means, by being transfused on the microcomputer along with the variable electric moter voltage of the duty of motor, microcomputer compares electric moter voltage, judges whether operate as normal of motor.
In order to achieve the above object, electric machine operation state sensing device of the present invention comprises motor, electric moter voltage perception circuit and microcomputer, one side of motor links with the power supply of supplying from the outside, and opposite side provides system drive power by producing electromagnetic induction phenomenon; Electric moter voltage perception link tester is crossed the electric moter voltage of perception constantly along with the machine operation of external control signal control, and the electric moter voltage perceptual signal of output sensing results; Microcomputer reception electric moter voltage perceptual signal compares with the voltage allowed band of the electric moter voltage perceptual signal of having set, whether the motor of judging running operate as normal, determine the motor ON/OFF according to the result, produce control signal, and control signal is passed to motor.
Electric machine operation state cognitive method of the present invention:
Phase one: during the motor operate as normal, be reference voltage, set the reference voltage allowed band of normal/non-normal working of motor with the voltage of perception; Subordinate phase: the control signal that will control motor and the work of decision ON/OFF passes to motor, and the electric moter voltage when then the perception motor is worked along with the motor-driven control signal produces the electric moter voltage perceptual signal; Phase III: when motor cuts out work and start work, the difference and the allowed band of perceived electric moter voltage compared, judge whether operate as normal of motor.
The present invention has following effect:
For not having motor rotation number perception means or being provided with the device of the motor rotation number perception means of Hall element etc., know that by appending circuit substitutes with the dynamo-electric pressure sensitivity of electricity consumption, whether the motor that can perceive the device that does not have the perception means normal operating conditions, reduces the expense that expends on motor rotation number perception means.
Description of drawings
Fig. 1 is the structural representation of electric machine operation state sensing device of the present invention.
Fig. 2 is the flow sequence figure of electric machine operation state cognitive method of the present invention.
Embodiment
The present invention will be described in detail with embodiment with reference to the accompanying drawings.
Fig. 1 is an electric machine operation state sensing device structural representation of the present invention.Motor alternately rotates the sink or the stirrer of washing machine selectively.
Electric machine operation state sensing device of the present invention is made up of following structure: comprise motor, and electric moter voltage perception circuit and microcomputer, a side of motor links with the power supply of supplying from the outside, and opposite side provides system drive power by producing electromagnetic induction phenomenon; External control signal control machine operation, electric moter voltage perception circuit (S) passes through perception electric moter voltage constantly, and output motor voltage perceptual signal; Microcomputer receives the electric moter voltage perceptual signal, compare with the voltage allowed band of the electric moter voltage perceptual signal of having set, whether the motor of judging running operate as normal, simultaneously in order to change the flow velocity of washings, produce the control signal that decision motor rotation number changes, and control signal is passed to motor.
Below the course of work of the present invention is described.
During the motor operate as normal, the voltage of perception is reference voltage, judge that motor is whether during operate as normal, calculate the allowed band of reference voltage, allowed band is input on the microcomputer, by the motor-driven signal of control that microcomputer takes place, regulate load, the rotary work of control motor.
During the motor operate as normal, the voltage of institute's perception when motor load is in halted state compares with the work voltage of time institute's perception of motor load, because latter's voltage descends, microcomputer is controlled motor-driven.
When microcomputer generation motor stop signal control motor, the voltage of motor by electric moter voltage perception circuit (S) perception, and is stored in the microcomputer; When microcomputer produces the machine operation signal control motor again, electric moter voltage perception circuit (S) perception electric moter voltage, and be stored in the microcomputer.
Stop control signal and working control signal according to motor are stored in electric moter voltage in the microcomputer respectively, try to achieve the poor of two voltages, compare with the allowed band of setting and storing in advance, to motor whether operate as normal is judged.
In the course of work of motor, if the difference of two voltages does not surpass allowed band, the driver circuit of motor or motor can occur unusually, think that motor is at non-normal working, demonstrates mistake; If the difference of two voltages surpasses allowed band, just represent that motor is in operate as normal, can proceed work.
By the measured value of (S) perception of electric moter voltage perception circuit and input,, judge the change that is input to supply voltage self in the system by repeatedly measuring repeatedly or mean value.
Fig. 2 is an electric machine operation state perception method of work process flow diagram of the present invention.Flow process to the method for work of electric machine operation state sensing device is elaborated below.
Phase one: the electric moter voltage when measuring the motor operate as normal makes motor carry out operate as normal.Whether normally subordinate phase: the voltage by the perception of external control signal motor operate as normal time institute is reference voltage, calculate to judge motor reference voltage allowed band, inputs to microcomputer (with reference to S1 and S2).
Phase III: microcomputer produces the control signal that motor cuts out.Quadravalence section: the electric moter voltage (with reference to S3 and S4) that electric moter voltage perception circuit (S) perception changes along with the control signal control machine operation that is subjected to the phase III.
Five-stage: microcomputer produces and makes motor start the control signal of work.The 6th stage: electric moter voltage perception circuit (S) perception is along with the electric moter voltage (with reference to S5 and S6) of the machine operation variation of the control signal that is subjected to five-stage.
The motor operate as normal the time, motor is in the voltage of the time institute's perception of cutting out duty and motor is in the voltage that starts the perception of duty time institute and compares, latter's voltage descends, so demonstrate lower.In the 7th stage, the difference of the electric moter voltage of the 4th stage (S4) and the 6th stage (S6) institute perception is voltage (with reference to S7) as a comparison.
In the 8th stage, the voltage allowed band that comparative voltage that the 7th stage was drawn and the 2nd stage extrapolate compares, and judges whether comparative voltage exceeds voltage allowed band (with reference to S8).
If the judged result in the 8th stage is ' being ', then in the 9th stage, microcomputer thinks that motor is in normal operating conditions; If the judged result in the 8th stage is ' denying ', then in the 10th stage, microcomputer thinks that motor is in abnormal operating state (with reference to S9 and S10).
Claims (2)
1. an electric machine operation state sensing device is characterized in that by motor, and electric moter voltage perception circuit and microcomputer are formed, and a side of motor links with the power supply of supplying from the outside, and opposite side provides system drive power by producing electromagnetic induction phenomenon; Electric moter voltage perception link tester is crossed perception constantly, along with the electric moter voltage of the machine operation of external control signal control, and the electric moter voltage perceptual signal of output sensing results; Microcomputer reception electric moter voltage perceptual signal compares with the voltage allowed band of the electric moter voltage perceptual signal of having set, whether the motor of judging running operate as normal, determine the motor ON/OFF according to the result, produce control signal, and control signal is passed to motor.
2. electric machine operation state cognitive method is characterized in that:
Phase one: during the motor operate as normal, be reference voltage, set the reference voltage allowed band of normal/non-normal working of motor with the voltage of perception;
Subordinate phase: the control signal that will control motor and the work of decision ON/OFF passes to motor, and the electric moter voltage when then the perception motor is worked along with the motor-driven control signal produces the electric moter voltage perceptual signal;
Phase III: when motor cuts out work and start work, the difference and the allowed band of perceived electric moter voltage compared, judge whether operate as normal of motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021043604A CN100359334C (en) | 2002-03-05 | 2002-03-05 | Electric machine operation state sensor and sensing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021043604A CN100359334C (en) | 2002-03-05 | 2002-03-05 | Electric machine operation state sensor and sensing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1442701A CN1442701A (en) | 2003-09-17 |
| CN100359334C true CN100359334C (en) | 2008-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021043604A Expired - Fee Related CN100359334C (en) | 2002-03-05 | 2002-03-05 | Electric machine operation state sensor and sensing method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303393B (en) * | 2007-05-08 | 2011-01-05 | 鸿富锦精密工业（深圳）有限公司 | Monitoring system and monitoring method of motor operation |
| DE102019112019B4 (en) * | 2019-05-08 | 2021-01-14 | Danfoss Power Electronics A/S | Motor drive and method for monitoring operational measurement data of an electric motor with at least one operating point |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6415095A (en) * | 1987-07-09 | 1989-01-19 | Matsushita Electric Ind Co Ltd | Cloth amount detector of washing machine |
| JPH05253384A (en) * | 1992-03-16 | 1993-10-05 | Matsushita Electric Ind Co Ltd | Controller of washing machine |
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2002
- 2002-03-05 CN CNB021043604A patent/CN100359334C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6415095A (en) * | 1987-07-09 | 1989-01-19 | Matsushita Electric Ind Co Ltd | Cloth amount detector of washing machine |
| JPH05253384A (en) * | 1992-03-16 | 1993-10-05 | Matsushita Electric Ind Co Ltd | Controller of washing machine |
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| CN1442701A (en) | 2003-09-17 |
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Granted publication date: 20080102 Termination date: 20100305 |