CN112230142A - Alternating current motor fault detection circuit - Google Patents
Alternating current motor fault detection circuit Download PDFInfo
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- CN112230142A CN112230142A CN202011001998.9A CN202011001998A CN112230142A CN 112230142 A CN112230142 A CN 112230142A CN 202011001998 A CN202011001998 A CN 202011001998A CN 112230142 A CN112230142 A CN 112230142A
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- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 230000003287 optical effect Effects 0.000 claims description 45
- 230000008878 coupling Effects 0.000 claims description 38
- 238000010168 coupling process Methods 0.000 claims description 38
- 238000005859 coupling reaction Methods 0.000 claims description 38
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 33
- 229910052710 silicon Inorganic materials 0.000 claims description 33
- 239000010703 silicon Substances 0.000 claims description 33
- 239000003990 capacitor Substances 0.000 claims description 27
- 230000007935 neutral effect Effects 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention provides an alternating current motor fault detection circuit which comprises an optocoupler module and a voltage division circuit, wherein the optocoupler module is connected with a live wire, a motor interface and a singlechip; the voltage division circuit is connected with the live wire, the motor interface and the single chip microcomputer; and the motor interface is connected with the zero line, the optocoupler module and the voltage division circuit. The alternating current motor fault detection circuit provided by the invention has the advantages that the circuit is connected with the single chip microcomputer through the optocoupler module, the voltage division circuit, the live wire, the zero line, the motor interface and the voltage division circuit; the problem of low fault detection accuracy of the existing alternating current motor fault detection circuit is solved; the purpose of autonomously judging the motor fault and the motor running state through the single chip microcomputer detection signal is achieved, and the accuracy of motor fault detection is greatly improved.
Description
Technical Field
The invention relates to the field of fault detection circuits, in particular to an alternating current motor fault detection circuit.
Background
Along with the development of the society, more and more intelligent electronic products enter the lives of people, the intelligent electronic products have higher and higher requirements on fault identification, but the fault test of the motor is difficult to perform after the products are assembled; therefore, a circuit for detecting the fault of the alternating current motor is produced.
The conventional alternating current motor fault detection circuit is a solid-state relay device for an alternating current motor controller, disclosed in Chinese patent No. CN201515336U, and published as 2010.06.23; the on-off control of the power output port is realized under the action of a control circuit consisting of a double-optical coupling network.
Although the solid-state relay device for the ac motor controller disclosed in the above patent can detect a fault of the ac motor, the method of detecting the fault and manually determining the fault results in a low accuracy of fault detection.
Disclosure of Invention
In order to solve the problem of low fault detection accuracy of the existing alternating current motor fault detection circuit, the invention provides an alternating current motor fault detection circuit which comprises an optocoupler module and a voltage division circuit, wherein the optocoupler module is connected with a live wire, a motor interface and a singlechip; the voltage division circuit is connected with the live wire, the motor interface and the single chip microcomputer; and the motor interface is connected with the zero line, the optocoupler module and the voltage division circuit.
Further, the motor interface comprises a high-speed interface, a medium-speed interface, a low-speed interface and a zero line interface.
Further, the zero line interface is connected with a zero line; the high-speed interface, the medium-speed interface and the low-speed interface are connected with the optical coupling module.
Further, the optical coupling module comprises a first optical coupling module, a second optical coupling module and a third optical coupling module;
the first optocoupler module is connected with the live wire, the high-speed interface and the singlechip;
the second optocoupler module is connected with the live wire, the medium-speed interface and the singlechip;
and the third optocoupler module is connected with the live wire, the low-speed interface and the singlechip.
Further, the first optical coupling module comprises a resistor R1 and a thyristor Q1 which are respectively connected with a live wire; a pin 1 of the controllable silicon Q1 is connected with a live wire; the 3 pins of the controllable silicon Q1 and the resistor R1 are respectively connected with two terminals of an optocoupler U1; the other terminal of the optocoupler U1 is connected with the singlechip through a resistor R2;
the high-speed interface is respectively connected with a pin 2 of the controllable silicon Q1, one end of a resistor R3 and one end of a capacitor C1; the other ends of the resistor R3 and the capacitor C1 are connected with a pin 3 of a high-power capacitor Q1.
Further, the second optical coupling module comprises a resistor R4 and a thyristor Q2 which are respectively connected with a live wire; a pin 1 of the controllable silicon Q2 is connected with a live wire; the 3 pins of the controllable silicon Q2 and the resistor R4 are respectively connected with two terminals of an optocoupler U2; the other terminal of the optocoupler U2 is connected with the singlechip through a resistor R5;
the medium-speed interface is respectively connected with a pin 2 of the controlled silicon Q2, one end of a resistor R6 and one end of a capacitor C2; the other ends of the resistor R6 and the capacitor C2 are connected with a pin 3 of a high-power capacitor Q2.
Further, the third optical coupling module comprises a resistor R7 and a thyristor Q3 which are respectively connected with a live wire; a pin 1 of the controllable silicon Q3 is connected with a live wire; the 3 pins of the controllable silicon Q3 and the resistor R7 are respectively connected with two terminals of an optocoupler U3; the other terminal of the optocoupler U3 is connected with the singlechip through a resistor R8;
the low-speed interface is respectively connected with a pin 2 of a controlled silicon Q3, one end of a resistor R9 and one end of a capacitor C3; the other ends of the resistor R9 and the capacitor C3 are connected with a pin 3 of a high-power capacitor Q3.
Furthermore, the zero line and the live line are connected with power modules.
Furthermore, the zero line and the live line are connected with an EMC module.
Furthermore, the single chip microcomputer converts the received signals into indicator lights for display.
The alternating current motor fault detection circuit provided by the invention has the advantages that the circuit is connected with the single chip microcomputer through the optocoupler module, the voltage division circuit, the live wire, the zero line, the motor interface and the voltage division circuit; the problem of low fault detection accuracy of the existing alternating current motor fault detection circuit is solved; the purpose of autonomously judging the motor fault and the motor running state through the single chip microcomputer detection signal is achieved, and the accuracy of motor fault detection is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a circuit diagram of an ac motor fault detection circuit according to the present invention.
Reference numerals:
10 optical coupler module 11 first optical coupler module 12 second optical coupler module
13 motor interface of voltage division circuit 30 of third optical coupling module 20
31 high speed interface 32 medium speed interface 33 low speed interface
34 zero line interface 40 single chip microcomputer 50 power supply module
60EMC module
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "couple" or "couples" and the like are not restricted to physical or mechanical connections, but may include electrical connections, optical connections, and the like, whether direct or indirect.
The invention provides an alternating current motor fault detection circuit, as shown in fig. 1, which comprises an optical coupling module 10 and a voltage division circuit 20, wherein the optical coupling module 10 is connected with a live wire, a motor interface 30 and a single chip microcomputer 40; the voltage division circuit 20 is connected with a live wire, a motor interface 30 and a singlechip 40; and the motor interface 30 is connected with the zero line, the optical coupling module 10 and the voltage division circuit 20.
In specific implementation, when the motor does not run, the optical coupling module 10 is in series connection with the main winding, each level of auxiliary winding and the temperature fuse in the motor, the optical coupling module 10 is conducted in a positive half period and a negative half period of alternating current is cut off, so that the single chip microcomputer 40 can detect the frequency of the alternating current; if any point of the main winding, each level of secondary windings and the temperature fuse of the optical coupling module 10 connected in series is disconnected, the single chip microcomputer 40 cannot detect a signal. When the motor is in medium-speed operation or high-speed operation, induced electromotive force is generated, the induced electromotive force in the high-speed operation is larger than that in the medium-speed operation, and the singlechip 40 judges the operation speed of the motor according to the detected magnitude of the induced electromotive force. When the motor is in low-speed operation, the optical coupling module 10 is short-circuited, no signal is output, but the voltage division circuit 20 is still conducted, and the single chip microcomputer 40 can detect the signal of the voltage division circuit 20 to judge that the motor is in low-speed operation. The structure of the windings inside the motor and the connection mode of the winding motor interface 30 are the prior art, and therefore, are not described herein again.
The alternating current motor fault detection circuit provided by the invention has the advantages that the circuit is connected with the single chip microcomputer through the optocoupler module, the voltage division circuit, the live wire, the zero line, the motor interface and the voltage division circuit; the problem of low fault detection accuracy of the existing alternating current motor fault detection circuit is solved; the purpose of autonomously judging the motor fault and the motor running state through the single chip microcomputer detection signal is achieved, and the accuracy of motor fault detection is greatly improved.
Preferably, as shown in fig. 1, the motor interface 30 includes a high-speed interface 31, a medium-speed interface 32, a low-speed interface 33, and a neutral interface 34.
Preferably, as shown in fig. 1, the neutral wire interface 34 is connected with a neutral wire; the high-speed interface 31, the medium-speed interface 32 and the low-speed interface 33 are connected to the opto-coupler module 10.
Preferably, as shown in fig. 1, the optical coupler module 10 includes a first optical coupler module 11, a second optical coupler module 12, and a third optical coupler module 13;
the first optocoupler module 11 is connected with a live wire, a high-speed interface 31 and a singlechip 40;
the second optical coupling module 12 is connected with a live wire, a medium-speed interface 32 and a single chip microcomputer 40;
and the third optical coupling module 13 is connected with a live wire, a low-speed interface 33 and a singlechip 40.
Preferably, as shown in fig. 1, the first optical coupling module 11 includes a resistor R1 and a thyristor Q1 respectively connected to the live line; a pin 1 of the controllable silicon Q1 is connected with a live wire; the 3 pins of the controllable silicon Q1 and the resistor R1 are respectively connected with two terminals of an optocoupler U1; the other terminal of the optocoupler U1 is connected with the singlechip 40 through a resistor R2;
the high-speed interface 31 is respectively connected with a pin 2 of a controllable silicon Q1, one end of a resistor R3 and one end of a capacitor C1; the other ends of the resistor R3 and the capacitor C1 are connected with a pin 3 of a high-power capacitor Q1.
Preferably, as shown in fig. 1, the second optical coupling module 12 includes a resistor R4 and a thyristor Q2 respectively connected to the live line; a pin 1 of the controllable silicon Q2 is connected with a live wire; the 3 pins of the controllable silicon Q2 and the resistor R4 are respectively connected with two terminals of an optocoupler U2; the other terminal of the optocoupler U2 is connected with the singlechip 40 through a resistor R5;
the medium-speed interface 32 is respectively connected with a pin 2 of the controlled silicon Q2, one end of the resistor R6 and one end of the capacitor C2; the other ends of the resistor R6 and the capacitor C2 are connected with a pin 3 of a high-power capacitor Q2.
Preferably, as shown in fig. 1, the third optical coupling module 13 includes a resistor R7 and a thyristor Q3 respectively connected to the live line; a pin 1 of the controllable silicon Q3 is connected with a live wire; the 3 pins of the controllable silicon Q3 and the resistor R7 are respectively connected with two terminals of an optocoupler U3; the other terminal of the optocoupler U3 is connected with the singlechip 40 through a resistor R8;
the low-speed interface 33 is respectively connected with a pin 2 of a controllable silicon Q3, one end of a resistor R9 and one end of a capacitor C3; the other ends of the resistor R9 and the capacitor C3 are connected with a pin 3 of a high-power capacitor Q3.
In practical implementation, when the motor runs at a high speed, the voltage is high, so the resistance values of R11, R12 and R13 in the voltage dividing circuit 20 are large enough, specifically, R11, R12 and R13 can be 200K Ω; the controllable silicon Q1, controllable silicon Q2, controllable silicon Q3's model are JST134, the model of opto-coupler U1, opto-coupler U2, opto-coupler U3 are MOC 3023.
Preferably, as shown in fig. 1, the neutral wire and the live wire are connected with a power module 50.
Preferably, as shown in fig. 1, the neutral wire and the live wire are connected with an EMC module 60.
In specific implementation, the EMC module 60 can prevent interference, and its working principle and structure are the prior art, and therefore are not described herein again.
Preferably, as shown in fig. 1, the single chip microcomputer 40 converts the received signal into an indicator light for display.
During the concrete implementation, the unable motor fault that detects of singlechip 40 when the machine is in normal operation, in case the machine shuts down, singlechip 40 just can detect the motor fault, and specific detection principle is as follows: the IO port level signal of the singlechip 40 controls the controlled silicon Q1, the controlled silicon Q2 and the controlled silicon Q3 to be in a cut-off state through the optocoupler U1, the optocoupler U2 and the optocoupler U3, the motor stops working, if the motor is normal, the optocoupler OP1 and the motor can form a loop in the positive period of the mains supply, and the singlechip 40 can detect a zero signal to indicate that the motor has no fault; if the zero signal is not detected, the motor fault is indicated, and a yellow light is turned on when the motor fault is detected.
Although terms such as the optical coupling module, the first optical coupling module, the second optical coupling module, the third optical coupling module, the voltage divider circuit, the motor interface, the high-speed interface, the medium-speed interface, the low-speed interface, the neutral line interface, the single chip microcomputer, the power supply module, and the EMC module are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An alternating current motor fault detection circuit is characterized in that: the circuit comprises an optical coupling module (10) and a voltage division circuit (20), wherein the optical coupling module (10) is connected with a live wire, a motor interface (30) and a singlechip (40); the voltage division circuit (20) is connected with a live wire, a motor interface (30) and a singlechip (40); and the motor interface (30) is connected with the zero line, the optical coupling module (10) and the voltage division circuit (20).
2. The ac motor fault detection circuit of claim 1, wherein: the motor interface (30) comprises a high-speed interface (31), a medium-speed interface (32), a low-speed interface (33) and a zero line interface (34).
3. The ac motor fault detection circuit of claim 2, wherein: the zero line interface (34) is connected with a zero line; the high-speed interface (31), the medium-speed interface (32) and the low-speed interface (33) are connected with the optical coupling module (10).
4. The ac motor fault detection circuit of claim 2, wherein: the optical coupling module (10) comprises a first optical coupling module (11), a second optical coupling module (12) and a third optical coupling module (13);
the first optocoupler module (11) is connected with a live wire, a high-speed interface (31) and a singlechip (40);
the second optical coupling module (12) is connected with a live wire, a medium-speed interface (32) and a single chip microcomputer (40);
and the third optical coupling module (13) is connected with a live wire, a low-speed interface (33) and a singlechip (40).
5. The ac motor fault detection circuit of claim 4, wherein: the first optocoupler module (11) comprises a resistor R1 and a thyristor Q1 which are respectively connected with a live wire; a pin 1 of the controllable silicon Q1 is connected with a live wire; the 3 pins of the controllable silicon Q1 and the resistor R1 are respectively connected with two terminals of an optocoupler U1; the other terminal of the optocoupler U1 is connected with the singlechip (40) through a resistor R2;
the high-speed interface (31) is respectively connected with a pin 2 of a controllable silicon Q1, one end of a resistor R3 and one end of a capacitor C1; the other ends of the resistor R3 and the capacitor C1 are connected with a pin 3 of a high-power capacitor Q1.
6. The ac motor fault detection circuit of claim 4, wherein: the second optical coupling module (12) comprises a resistor R4 and a thyristor Q2 which are respectively connected with a live wire; a pin 1 of the controllable silicon Q2 is connected with a live wire; the 3 pins of the controllable silicon Q2 and the resistor R4 are respectively connected with two terminals of an optocoupler U2; the other terminal of the optocoupler U2 is connected with the singlechip (40) through a resistor R5;
the medium-speed interface (32) is respectively connected with a pin 2 of the controlled silicon Q2, one end of the resistor R6 and one end of the capacitor C2; the other ends of the resistor R6 and the capacitor C2 are connected with a pin 3 of a high-power capacitor Q2.
7. The ac motor fault detection circuit of claim 4, wherein: the third optical coupling module (13) comprises a resistor R7 and a thyristor Q3 which are respectively connected with a live wire; a pin 1 of the controllable silicon Q3 is connected with a live wire; the 3 pins of the controllable silicon Q3 and the resistor R7 are respectively connected with two terminals of an optocoupler U3; the other terminal of the optocoupler U3 is connected with the singlechip (40) through a resistor R8;
the low-speed interface (33) is respectively connected with a pin 2 of a controllable silicon Q3, one end of a resistor R9 and one end of a capacitor C3; the other ends of the resistor R9 and the capacitor C3 are connected with a pin 3 of a high-power capacitor Q3.
8. The ac motor fault detection circuit of claim 1, wherein: and the zero line and the live line are connected with a power module (50).
9. The ac motor fault detection circuit of claim 1, wherein: and the zero line and the live line are connected with an EMC module (60).
10. The ac motor fault detection circuit of claim 1, wherein: the single chip microcomputer (40) converts the received signals into indicator lights for display.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011001998.9A CN112230142B (en) | 2020-09-22 | 2020-09-22 | Alternating current motor fault detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011001998.9A CN112230142B (en) | 2020-09-22 | 2020-09-22 | Alternating current motor fault detection circuit |
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| CN112230142A true CN112230142A (en) | 2021-01-15 |
| CN112230142B CN112230142B (en) | 2023-12-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117595465A (en) * | 2024-01-18 | 2024-02-23 | 杭州高特电子设备股份有限公司 | Active equalization circuit of battery pack and protection system thereof |
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| CN112230142B (en) | 2023-12-12 |
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