CN216622616U - Stepping motor fault detection system and air conditioner - Google Patents
Stepping motor fault detection system and air conditioner Download PDFInfo
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- CN216622616U CN216622616U CN202123148764.XU CN202123148764U CN216622616U CN 216622616 U CN216622616 U CN 216622616U CN 202123148764 U CN202123148764 U CN 202123148764U CN 216622616 U CN216622616 U CN 216622616U
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Abstract
The utility model provides a fault detection system of a stepping motor, which comprises a single chip microcomputer, a drive IC, the stepping motor and a fault indicator lamp, wherein the single chip microcomputer is respectively connected with the drive IC and the fault indicator lamp, the drive IC is also connected with the stepping motor, a current detection circuit is arranged between the single chip microcomputer and the drive IC, and a voltage detection circuit is arranged between the single chip microcomputer and the stepping motor. Compared with the prior art, the fault detection system for the stepping motor can effectively detect whether the stepping motor or the driving circuit has faults or not, is convenient for reminding workers of the abnormity of the stepping motor or the driving circuit and checking and maintaining, and avoids the abnormal operation of an air conditioner caused by the error of the motion angle of the expansion valve.
Description
Technical Field
The utility model relates to the field of air conditioners, in particular to a fault detection system of a stepping motor and an air conditioner.
Background
The expansion valve has been widely used in air conditioning system pressure adjustment at present, and the expansion valve drive mode is step motor usually, and step motor adopts open loop control among the prior art usually, and when step motor took place short circuit, open circuit or other circuit abnormalities, the staff can't know can not in time maintain, can lead to the expansion valve motion angle to produce the mistake, and then influences system pressure, arouses air conditioner operation abnormity.
In view of the above, the present invention is particularly proposed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a fault detection system of a stepping motor and an air conditioner, and aims to solve the problem that in the prior art, when the stepping motor is in short circuit, open circuit or other circuit abnormalities, a worker cannot know that the stepping motor cannot be maintained in time, so that the movement angle of an expansion valve is wrong, the system pressure is further influenced, and the air conditioner is abnormal in operation.
In order to achieve the purpose, the technical scheme of the utility model is realized as follows:
the utility model provides a step motor fault detection system, step motor fault detection system includes singlechip, driver IC, step motor and fault indicator, the singlechip respectively with driver IC fault indicator connects, driver IC still with step motor connects the singlechip with set up current detection circuit between the driver IC the singlechip with set up voltage detection circuit between the step motor.
The stepping motor fault detection system can effectively detect whether the stepping motor or the driving circuit has faults or not, is convenient for reminding workers of the abnormity of the stepping motor or the driving circuit and checking and maintaining, and avoids the abnormal operation of an air conditioner caused by the error of the motion angle of the expansion valve.
Further, the current detection circuit is set to be a single resistor for sampling.
This arrangement facilitates accurate detection of the stepping motor operating current.
Further, step motor contains the four-phase, is A, B, C, D respectively, the singlechip contains four ways drive IO, controls respectively step motor's A, B, C, D four-phase conducting state.
This setting is convenient for the singlechip to carry out accurate control to step motor.
The stepping motor is connected with the expansion valve.
This arrangement facilitates the control of the expansion valve by the stepping motor.
Further, the singlechip adopts an ATMEGA48V chip to control and output 4-phase 8-beat pulse signals.
In a second aspect of the present invention, an air conditioner is provided, wherein the air conditioner uses any one of the stepping motor fault detection systems.
Compared with the prior art, the stepping motor fault detection system and the air conditioner can effectively detect whether the stepping motor or the driving circuit has a fault or not, are convenient for reminding workers of the abnormity of the stepping motor or the driving circuit and checking and maintaining, and avoid the abnormal operation of the air conditioner caused by the error of the motion angle of the expansion valve.
Drawings
Fig. 1 is a schematic structural diagram of a stepping motor fault detection system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a step motor fault detection method according to an embodiment of the present invention.
Description of reference numerals:
1. a single chip microcomputer; 2. a driver IC; 3. a stepping motor; 4. a fault indicator light; 5. a current detection circuit; 6. a voltage detection circuit.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The descriptions of "first," "second," etc. mentioned in the embodiments of the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
The embodiment provides a fault detection method for a stepping motor, which is used for detecting whether the stepping motor 3 and a driving circuit have faults or not, and comprises the following steps:
acquiring the working state of the stepping motor 3;
acquiring a current value I1 of the drive IC 2;
if the current value I1 of the driver IC2 is not equal to the normal current value of the stepping motor 3 in the working state, the single chip microcomputer 1 controls the fault indicator lamp 4 to be on.
The fault detection method for the stepping motor can effectively detect whether the stepping motor 3 or the driving circuit has faults or not, is convenient for reminding workers of the abnormity of the stepping motor 3 or the driving circuit and checking and maintaining, and avoids the abnormal operation of the air conditioner caused by the error generated by the movement angle of the expansion valve.
Specifically, the working state of the stepping motor 3 is obtained by the condition that four paths of driving IO of the single chip microcomputer 1 output low level.
This arrangement facilitates accurate acquisition of the operating state of the stepping motor 3.
Specifically, obtaining the operating state of the stepping motor 3 through the condition that the four paths of driving IO of the single chip microcomputer 1 output low level specifically includes: when the four paths of drive IO of the single chip microcomputer 1 all output low levels, the working state of the stepping motor 3 is standby (non-working); when only one of four paths of drive IO of the single chip microcomputer 1 outputs low level, the working state of the stepping motor 3 is single-phase working; when four paths of driving IO paths of the single chip microcomputer 1 output low levels, the working state of the stepping motor 3 is two-phase working.
This setting is convenient for obtain step motor 3's operating condition according to the condition that four ways drive IO of singlechip 1 exported the low level.
Specifically, the stepping motor 3 includes four phases, each of which is A, B, C, D, and the single chip microcomputer 1 includes four paths of driving IO for respectively controlling the on-state of the A, B, C, D four phases of the stepping motor 3.
This setting is convenient for singlechip 1 to carry out accurate control to step motor 3.
More specifically, the stepping motor 3 includes four phases A, B, C, D, and the dc resistance of each phase is RX, so that the operating current of each phase is:
in the normal working state, the forward direction is circulated in sequence according to four-phase eight-beat A → AB → B → BC → C → CD → D → DA, and the set steps are operated; the inverted state is cycled in the order D → DC → C → CB → B → BA → A → AD, running a set number of steps.
Specifically, the normal current value of the stepping motor 3 in the operating state specifically includes:
when the working state of the stepping motor 3 is standby, the normal current value is 0; when the working state of the stepping motor 3 is single-phase working, the current is
When the working state of the stepping motor 3 is two-phase working, the current is
This arrangement facilitates determination of whether the stepping motor 3 or the drive circuit is abnormal.
Specifically, a current value I1 of the drive IC2 is obtained through the current detection circuit 5, and the current detection circuit 5 feeds back a current value I1 of the obtained drive IC2 to the single chip microcomputer 1 after obtaining a current value I1 of the drive IC 2.
More specifically, the method for detecting the fault of the stepping motor in the embodiment specifically includes the following steps:
s1, starting;
s2, the single chip microcomputer 1 judges whether four paths of driving IO of the single chip microcomputer 1 output low level or not; if yes, go to S3; if not, go to S5;
whether the four-way drive IO of the single chip microcomputer 1 outputs all low levels or not is judged through the step S2, so that the judgment is facilitated whether the working state of the stepping motor 3 is standby (out of work) or not, and when the four-way drive IO of the single chip microcomputer 1 outputs all low levels or not, the working state of the stepping motor 3 is standby (out of work).
S3, detecting the current value I1 of the driving IC 2;
specifically, the current I1 of the drive IC2 ((i.e., the operating current of the stepping motor 3) is detected by the current detection circuit 5.
S4, the single chip microcomputer 1 judges whether the current I1 of the drive IC2 is equal to 0; if yes, go to S12; if not, go to S11;
when the working state of the stepping motor 3 is standby, the normal current value is 0; if the current value I1 is equal to 0, it means that the stepping motor 3 is in standby, does not work, and is in a normal state; otherwise, I1 ≠ 0, which represents that the stepping motor 3 or the driving circuit is abnormal, and the singlechip 1 controls the fault indicator lamp 4 to be on.
S5, the single chip microcomputer 1 judges whether only one drive IO of the four drive IOs of the single chip microcomputer 1 outputs low level; if yes, go to S6; if not, go to S8;
whether only one output low level of the four drive IO paths of the single chip microcomputer 1 is judged through the step S5, so that whether the working state of the stepping motor 3 works in a single phase or not is judged, and when only one output low level of the four drive IO paths of the single chip microcomputer 1 works in a single phase, the working state of the stepping motor 3 works in a single phase.
S6, detecting the current value I1 of the drive IC 2;
s7, determining whether the current I1 of the driving IC2 is equal to
If yes, go to S12; if not, go to S11;
when the working state of the stepping motor 3 is single-phase working, the current is
At this time, if the current value is
The step motor 3 works normally; otherwise, the reverse is carried out
The single chip microcomputer 1 controls the fault indicator lamp 4 to be on when the stepping motor 3 or the driving circuit is abnormal.
S8, the single chip microcomputer 1 judges whether four drive IO of the single chip microcomputer 1 has two output low levels; if yes, go to S9; if not, entering S11;
whether two paths of output low levels exist in the four paths of drive IO of the single chip microcomputer 1 is judged through the step S8, whether the working state of the stepping motor 3 works in two phases is convenient to judge, and when the four paths of drive IO of the single chip microcomputer 1 has two paths of output low levels, the working state of the stepping motor 3 works in two phases. If the working state of the stepping motor 3 is neither standby nor single-phase working, nor two-phase working, the surface stepping motor 3 or the driving circuit is abnormal, and the singlechip 1 controls the fault indicator lamp 4 to be on.
S9, detecting the current I1 of the drive IC 2;
s10, determining whether the current I1 of the driving IC2 is equal to
If yes, go to S12; if not, go to S11;
when the working state of the stepping motor 3 is two-phase working, the current is
At this time, if the current value is
The step motor 3 works normally; otherwise, the reverse is carried out
The single chip microcomputer 1 controls the fault indicator lamp 4 to be on when the stepping motor 3 or the driving circuit is abnormal.
S11, the single chip microcomputer 1 controls the fault indicator lamp 4 to be on;
the step S11 is set to remind the worker that the stepping motor 3 or the driving circuit is abnormal, so that the worker can know and check and maintain the stepping motor or the driving circuit in time, and the abnormal operation of the air conditioner caused by the error of the movement angle of the expansion valve can be avoided.
And S12, ending.
Specifically, the step motor fault detection method detects whether the step motor 3 and the driving circuit have faults by using the step motor fault detection system according to any one of embodiments 2.
According to the fault detection method for the stepping motor, through the steps S1-S12, whether the stepping motor 3 or the driving circuit has a fault or not can be effectively detected, so that the worker can be reminded of the abnormity of the stepping motor 3 or the driving circuit and can check and maintain the abnormity, and the abnormal operation of the air conditioner caused by the error of the movement angle of the expansion valve can be avoided.
During execution of S12, the process returns to step S1 in real time.
Whether this setting can real-time detection step motor 3 or drive circuit break down, be convenient for remind staff step motor 3 or drive circuit unusual and check the maintenance, avoid the expansion valve motion angle to produce the mistake and arouse that the air conditioner operates unusually.
Example 2
This embodiment proposes a stepping motor failure detection system using the stepping motor failure detection method according to any one of embodiments 1.
Step motor fault detection system includes singlechip 1, driver IC2, step motor 3 and fault indicator 4, singlechip 1 respectively with driver IC2 fault indicator 4 connects, driver IC2 still with step motor 3 connects singlechip 1 with set up current detection circuit 5 between the driver IC2 singlechip 1 with set up voltage detection circuit 6 between the step motor 3.
The stepping motor fault detection system can effectively detect whether the stepping motor 3 or the driving circuit has faults or not, is convenient for reminding workers of the abnormity of the stepping motor 3 or the driving circuit and checking and maintaining, and avoids the abnormity of the air conditioner caused by the error generated by the movement angle of the expansion valve.
The single chip microcomputer 1 is used for controlling the driving IC2 to drive the stepping motor 3. The stepping motor 3 is connected with the expansion valve, and the stepping motor 3 is used for driving the expansion valve to move. The current detection circuit 5 is used for detecting the working current of the stepping motor 3, and the current detection circuit 5 can feed back the working current of the stepping motor 3 to the single chip microcomputer 1 after the working current of the stepping motor 3 is obtained. The voltage detection circuit 6 is used for detecting the working voltage of the stepping motor 3, and the voltage detection circuit 6 can feed back the working voltage of the stepping motor 3 to the single chip microcomputer 1 after the working voltage of the stepping motor 3 is obtained.
And the fault indicator lamp 4 is used for displaying the abnormity of the stepping motor 3 or the driving circuit.
The current detection circuit 5 is set to a single resistance sampling.
This arrangement facilitates accurate detection of the operating current of the stepping motor 3.
Specifically, the stepping motor 3 includes four phases, each of which is A, B, C, D, and the single chip microcomputer 1 includes four paths of driving IO for respectively controlling the on-state of the A, B, C, D four phases of the stepping motor 3.
This setting is convenient for singlechip 1 to carry out accurate control to step motor 3.
Specifically, the chip of the single chip microcomputer 1 is not limited. In this embodiment, preferably, the single chip microcomputer 1 employs an ATMEGA48V chip, the single chip microcomputer 1 is also a core device in the apparatus, the single chip microcomputer 1 of the ATMEGA48V chip is an 8-bit AVR single chip microcomputer 1 with high performance and low power consumption, the single chip microcomputer 1 has an advanced RISC structure, 131 instructions can be written, the execution time of most instructions is a single clock cycle, a 32 × 8 general working register is used, the full static operation is performed, and the performance is as high as 16MIPS when the single chip microcomputer works at 16 MHz. The single chip microcomputer 1 controller of the ATMEGA48V chip outputs 4-phase and 8-beat pulse signals to drive the stepping motor 3 of the electronic expansion valve, so as to adjust the opening degree of the valve body and rapidly control the flow of the refrigerant in the refrigeration system.
The stepping motor fault detection system can effectively detect whether the stepping motor 3 or the driving circuit has faults or not, is convenient for reminding workers of the abnormity of the stepping motor 3 or the driving circuit and checking and maintaining, and avoids the abnormity of the air conditioner caused by the error generated by the movement angle of the expansion valve.
Example 3
This embodiment proposes an air conditioner using a stepping motor failure detection method according to any one of embodiment 1 and a stepping motor failure detection system according to embodiment 2.
For the air conditioner, besides the step motor fault detection system, the air conditioner further includes other related components such as a condenser and a compressor, and since the specific structures and the specific assembly relationships of the related components are the prior art, detailed description is omitted here.
The air conditioner can effectively detect whether the stepping motor 3 or the driving circuit breaks down, is convenient for reminding workers that the stepping motor 3 or the driving circuit is abnormal and checks and maintains, and avoids abnormal operation of the air conditioner caused by errors generated by the movement angle of the expansion valve.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (5)
1. The utility model provides a step motor fault detection system, its characterized in that, step motor fault detection system includes singlechip (1), drive IC (2), step motor (3) and fault indicator (4), singlechip (1) respectively with drive IC (2) fault indicator (4) are connected, drive IC (2) still with step motor (3) are connected singlechip (1) with set up current detection circuit (5) between drive IC (2) singlechip (1) with set up voltage detection circuit (6) between step motor (3), current detection circuit (5) set up to single resistance sampling.
2. A stepping motor fault detection system according to claim 1, characterized in that the stepping motor (3) comprises four phases, respectively A, B, C, D; the single chip microcomputer (1) comprises four paths of driving IO, and the four paths of driving IO are used for respectively controlling the conduction states of A, B, C, D four phases of the stepping motor (3).
3. A stepping motor fault detection system according to claim 1, characterized in that the stepping motor (3) is connected to an expansion valve.
4. The stepping motor fault detection system according to claim 1, wherein the single chip microcomputer (1) adopts an ATMEGA48V chip to control and output a 4-phase 8-beat pulse signal.
5. An air conditioner, characterized in that the air conditioner uses a stepping motor fault detection system according to any one of claims 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123148764.XU CN216622616U (en) | 2021-12-15 | 2021-12-15 | Stepping motor fault detection system and air conditioner |
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| CN202123148764.XU CN216622616U (en) | 2021-12-15 | 2021-12-15 | Stepping motor fault detection system and air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115294723A (en) * | 2022-07-10 | 2022-11-04 | 苏州永如利机电有限公司 | System and method for identifying abnormality of stepping motor system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115294723A (en) * | 2022-07-10 | 2022-11-04 | 苏州永如利机电有限公司 | System and method for identifying abnormality of stepping motor system |
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