CN206281930U - A kind of three phase electric machine break detection circuit - Google Patents
A kind of three phase electric machine break detection circuit Download PDFInfo
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- CN206281930U CN206281930U CN201621414502.XU CN201621414502U CN206281930U CN 206281930 U CN206281930 U CN 206281930U CN 201621414502 U CN201621414502 U CN 201621414502U CN 206281930 U CN206281930 U CN 206281930U
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Abstract
The utility model is related to electric machines test technical field, and in particular to a kind of three phase electric machine break detection circuit, it includes：Relay, the first end of relay is connected with three road current output terminals of three phase electric machine respectively, its second end is divided into three tunnels, the first via is connected by first resistor with the base stage of the first triode, second tunnel is connected by second resistance with the base stage of the second triode, 3rd tunnel is connected by 3rd resistor with the negative pole of power supply, the positive pole of power supply is connected by the 4th resistance with the emitter stage of the first triode, the colelctor electrode of the first triode connects with the emitter stage of the second triode, and second the colelctor electrode of triode connected with microprocessor by the 5th resistance, connect with one end of the 6th resistance between 5th resistance and microprocessor, the other end of the 6th resistance is connected between 3rd resistor and the negative pole of power supply；Its circuit structure of the utility model is simple, and easily manufactured, low production cost is suitable for being promoted on the market.
Description
Technical field
The utility model is related to electric machines test technical field, and in particular to a kind of three phase electric machine break detection circuit.
Background technology
Three phase electric machine has been widely used in industrial production and daily life, and three phase electric machine is if there is a certain group of line
During circle broken string, it is impossible to normal work；And the motor under broken string state can seriously generate heat once being powered, and cause motor damage even
Trigger the serious consequence of fire.To avoid the occurrence of problems, at present, electricity is detected generally by the principle of current transformer
Three groups of operating currents of coil determine whether there is the failure of broken string when machine works；But the circuit of this mode it is complex and
Its is relatively costly, is unfavorable for being promoted on the market.
The content of the invention
To overcome drawbacks described above, it is to provide a kind of three phase electric machine break detection circuit that the purpose of this utility model is.
The purpose of this utility model is achieved through the following technical solutions：
The utility model is a kind of three phase electric machine break detection circuit, and it is connected with three phase electric machine, including：Relay,
The first end of the relay is connected with three road current output terminals of the three phase electric machine respectively, and its second end is divided into three tunnels, its
The first via is connected by first resistor with the base stage of the first triode, and its second tunnel is by second resistance and the second triode
Base stage is connected, and its 3rd tunnel is connected by 3rd resistor with the negative pole of power supply, and the positive pole of the power supply passes through the 4th resistance
Emitter stage with first triode is connected, the emitter stage of the colelctor electrode of first triode and second triode
It is connected, and the colelctor electrode of second triode is connected by the 5th resistance with microprocessor, the 5th resistance and Wei Chu
Connect with one end of the 6th resistance between reason device, it is negative with power supply that the other end of the 6th resistance is connected to the 3rd resistor
Between pole.
Further, the power supply is that low pressure detects power supply.
Further, the relay is normal-open type relay.
The utility model can detect that its circuit structure is simple, easily manufactured to the broken string state of three phase electric machine, production
Low cost, is suitable for being promoted on the market.
Brief description of the drawings
For ease of explanation, the utility model is described in detail by following preferred embodiments and accompanying drawing.
Fig. 1 is circuit theory schematic diagram of the present utility model.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and implementation
Example, further describes to the utility model.It should be appreciated that specific embodiment described herein is only used to explain this reality
With new, it is not used to limit the utility model.
Fig. 1 is referred to, the utility model is a kind of three phase electric machine break detection circuit, and it is connected with three phase electric machine 2, wrapped
Include：Relay 3, the first end of the relay 3 is connected with three road current output terminals of the three phase electric machine 2 respectively, and its second
End is divided into three tunnels, and its first via is connected by first resistor 4 with the base stage of the first triode 5, and its second tunnel is by the second electricity
Resistance 6 is connected with the base stage of the second triode 7, and its 3rd tunnel is connected by 3rd resistor 8 with the negative pole of power supply 1, the electricity
The positive pole in source 1 is connected by the 4th resistance 9 with the emitter stage of first triode 5, the colelctor electrode of first triode 5
Emitter stage with second triode 7 is connected, and the colelctor electrode of second triode 7 passes through the 5th resistance 10 and microprocessor
Device 11 is connected, and connects with one end of the 6th resistance 12 between the 5th resistance 10 and microprocessor 11, the 6th resistance
12 other end is connected between the negative pole of the 3rd resistor 8 and power supply 1.
Further, the power supply 1 is that low pressure detects power supply.
Further, the relay 3 is normal-open type relay 3.
Operation principle of the present utility model is：In motor normal work, relay 3 is off, detection electricity
Road is not accessed, and when motor is stopped, the automatic pick of relay 3, detection circuit is accessed, and low pressure detection power supply passes through motor lines
Circle two triodes of conducting, then by electric resistance partial pressure, obtain a DC voltage and are detected for microprocessor 11；When any
When one group of motor coil breaks, one or two triode can be all caused to turn on, so as to cause microprocessor 11 to detect not
To voltage；Therefore, microprocessor 11 can receive magnitude of voltage and judge whether motor is in the state of broken string by whether having.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (3)
1. a kind of three phase electric machine break detection circuit, it is characterised in that it is connected with three phase electric machine, including：Relay, should be after
The first end of electrical equipment is connected with three road current output terminals of the three phase electric machine respectively, and its second end is divided into three tunnels, and it first
Road is connected by first resistor with the base stage of the first triode, and its second tunnel is by second resistance and the base stage of the second triode
It is connected, its 3rd tunnel is connected by 3rd resistor with the negative pole of power supply, the positive pole of the power supply passes through the 4th resistance and institute
The emitter stage for stating the first triode is connected, and the colelctor electrode of first triode is connected with the emitter stage of second triode
Connect, and the colelctor electrode of second triode is connected by the 5th resistance with microprocessor, the 5th resistance and microprocessor
Between connect with one end of the 6th resistance, the other end of the 6th resistance be connected to the 3rd resistor and power supply negative pole it
Between.
2. three phase electric machine break detection circuit according to claim 1, it is characterised in that the power supply is that low pressure detects electricity
Source.
3. three phase electric machine break detection circuit according to claim 2, it is characterised in that the relay be open type after
Electrical equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621414502.XU CN206281930U (en) | 2016-12-22 | 2016-12-22 | A kind of three phase electric machine break detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621414502.XU CN206281930U (en) | 2016-12-22 | 2016-12-22 | A kind of three phase electric machine break detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206281930U true CN206281930U (en) | 2017-06-27 |
Family
ID=59073786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621414502.XU Active CN206281930U (en) | 2016-12-22 | 2016-12-22 | A kind of three phase electric machine break detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206281930U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557464A (en) * | 2017-09-25 | 2019-04-02 | 郑州宇通客车股份有限公司 | A kind of motor phase failure fault detection method and device |
-
2016
- 2016-12-22 CN CN201621414502.XU patent/CN206281930U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557464A (en) * | 2017-09-25 | 2019-04-02 | 郑州宇通客车股份有限公司 | A kind of motor phase failure fault detection method and device |
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