CN203859496U - Motor stator winding heat protection control device - Google Patents
Motor stator winding heat protection control device Download PDFInfo
- Publication number
- CN203859496U CN203859496U CN201420094905.5U CN201420094905U CN203859496U CN 203859496 U CN203859496 U CN 203859496U CN 201420094905 U CN201420094905 U CN 201420094905U CN 203859496 U CN203859496 U CN 203859496U
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- Prior art keywords
- circuit
- protection control
- resistance
- motor stator
- stator winding
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Abstract
The utility model relates to a motor stator winding heat protection control device. The device comprises a temperature measuring circuit, an amplification circuit, a maximum value extraction circuit and a protection control circuit, wherein temperature sensing elements of the temperature measuring circuit are arranged at head and tail end portions of a motor stator winding, an electrical signal outputted by the temperature measuring circuit passes through the amplification circuit and the maximum value extraction circuit and then is connected with an input end of the protection control circuit, and a control signal outputted by the protection control circuit is connected with a power source control end of a controlled motor. The device acquires the work temperature of the motor stator winding in real time through the temperature sensing elements, amplification processing on each acquired signal is carried out, when the maximum value signal is greater than a set signal, the protection control circuit outputs a control signal for switching a motor control circuit off to make the motor stop work, so safety of the motor is guaranteed. The device has advantages of integral simple structure, strong anti-interference capability and stable, reliable, convenient and practical performance.
Description
Technical field
The utility model relates to the control device of motor stator winding heat protection.
Background technology
At present for detection of controlling the main technical schemes that the motor feels hot, mostly from motor stator A, B, C tri-phase windings, to gather respectively six groups of temperature detection signals by temperature-sensing element, every phase winding is got respectively two groups of temperature detection signals, and this signal is processed and processed the input signal of Hou Yi road as instrument, another road is as space signal source, when will patrolling for operating personnel, consults the motor temperature information spinner showing for instrument, this signal is also delivered to motor controlling cabinet simultaneously, for the control system in control cubicle.Although the variations in temperature of this technical scheme energy effective monitoring motor winding.But also exist following defect: although 1, be positioned at the temperature that the other Displaying Meter of motor can show motor winding in real time, but operating personnel carry out real-time monitored to instrument, normally within several hours, just make an inspection tour once, when motor winding temperature is abnormal, often operating personnel can not find in time.2, the signal that is sent to control cubicle from motor can be avoided the generation of accident being processed in real time by control system, but this signal is generally weak current analog signal, easily be disturbed, very easily cause the erroneous judgement of control system, and can not guarantee accurately and effectively the safe operation of motor.
Summary of the invention
The utility model object is to provide a kind of control device that accurately detects in real time the protection of motor stator winding heat, the defect existing to overcome prior art.
The utility model object is achieved in that this motor stator winding heat protection control device is to be extracted circuit and protected control circuit to form by temperature measurement circuit, amplifying circuit and maximum; the temperature-sensing element of described temperature measurement circuit is located at the end of motor stator winding initial and end; the signal of telecommunication of temperature measurement circuit output connects the input of protection control circuit through amplifying circuit and maximum extraction circuit, the control signal of protection control circuit output connects the power control terminal of controlled motor.
Above-mentioned temperature measurement circuit is six groups of the identical parallel join of structure, a phase winding of the corresponding motor stator of every two groups of circuit, and the temperature-sensing element of temperature measurement circuit is located at respectively the end of motor stator winding initial and end.Described amplifying circuit is also six groups of the identical parallel join of structure, the input of every group of amplifying circuit respectively with the corresponding connection of output of temperature measurement circuit.Above-mentioned maximum is extracted circuit and is made up of diode D1～D6 and resistance R 12, diode D1～D6 parallel join, its input respectively with the corresponding connection of output of amplifying circuit.
The technological progress that the utility model is obtained: the utility model is by being located at every phase stator winding coil head, the temperature-sensing element of tail end, the working temperature of Real-time Collection motor stator winding, and the signal that each phase winding temperature-sensing element is gathered all amplifies processing, extract circuit Dui Liu road signal by maximum again and carry out maximum extraction, only retain a maximum output, this maximum value signal and set point compare, if temperature has exceeded set point, a switch controlling signal of driving relay output of protection control circuit, this switch controlling signal cuts off circuit for controlling motor, motor is quit work, thereby effectively guarantee the safety of motor.This device overall structure is simple simultaneously, antijamming capability is strong, stable and reliable for performance, convenient and practical.
Brief description of the drawings
Fig. 1 is the utility model overall structure block diagram.
Fig. 2 is the utility model electrical schematic diagram.
Embodiment
Taking accompanying drawing as embodiment, the utility model is described in further detail below.As shown in Figure 1, 2, this motor stator winding heat protection control device is to be extracted circuit and protected control circuit to form by temperature measurement circuit, amplifying circuit and maximum.Described temperature measurement circuit is six groups of the identical parallel join of structure, a phase winding of the corresponding motor stator of every two groups of circuit, and the temperature-sensing element of temperature measurement circuit is located at respectively the end of motor stator winding initial and end.Amplifying circuit is also six groups of the identical parallel join of structure, wherein the input of every group of amplifying circuit respectively with the corresponding connection of output of temperature measurement circuit.Above-mentioned maximum is extracted circuit and is made up of diode D1～D6 and resistance R 12; diode D1～D6 parallel join; its input respectively with the corresponding connection of output of amplifying circuit; maximum is extracted the input of the output termination protection control circuit of circuit, and the control signal of protection control circuit output is connected with the power control terminal of controlled motor.Circuit structure to each part mentioned above and operation principle are described respectively below:
As shown in Figure 2, temperature measurement circuit and amplifying circuit the present embodiment are six groups of the identical parallel join of structure, and the operation principle of every group of circuit is identical with the course of work, existing only taking a road wherein as example describes.
Temperature measurement circuit is made up of temperature-sensing element resistance R t, R1～R7 and amplifier U1, temperature-sensing element resistance R t and resistance R 1～R3 Compositional balance bridge circuit, the output of balance bridge circuit is connected with the input of amplifier U1 through resistance R 4, R6, and resistance R 5 forms the feedback loop of amplifier U1.Temperature-sensing element resistance R t the present embodiment is selected platinum resistance thermometer sensor, Pt100.Temperature-sensing element resistance R t is located at stem or the afterbody of tested motor stator winding.Temperature-sensing element resistance R t and resistance R 1～R3 Compositional balance bridge circuit, wherein resistance R 2 is the basic point adjusting resistance of balance bridge circuit, and in the time of 0 DEG C, adjusting resistance R2 makes bridge balance, and output voltage is zero, in the time of variations in temperature, a voltage corresponding with temperature of balance bridge output.This voltage signal exports the input of amplifier U1 to, exports the input of amplifying circuit through the differential amplification signal of amplifier U1 to.
Described amplifying circuit is made up of amplifier U2 and resistance R 8～R11, resistance R 8 is the current limliting input resistance of amplifier U2, resistance R 11 is the balance resistance of amplifier U2, resistance R 9 and R10 form the feedback loop of amplifier U2, resistance R 9 is the multiplication factor adjusting resistance of amplifier U2, and the signal of telecommunication of being exported by temperature measurement circuit exports the input of maximum extraction circuit again to after the amplification again of inverting amplifier U2.
Described maximum is extracted circuit and is made up of diode D1～D6 and resistance R 12, diode D1～D6 parallel join, and its input is corresponding connection of output of Yu Liu road amplifying circuit respectively.Due to not identical by measured motor winding temperature of each point when the actual motion; thereby this device only need be made processing processing in time for maximum temperature; the maximum consisting of the diode D1～D6 by 6 parallel joins and load resistance R12 is extracted circuit; six groups of voltage signals to input compare, and maximum value signal are wherein exported to the input of protection control circuit.
Described protection control circuit is made up of amplifier U3, triode T and resistance R 13～R15 and relay K; resistance R 13～R15 forms the threshold voltage loop of amplifier U3; the adjusting resistance that wherein resistance R 14 is threshold voltage; the output in this loop is connected with the input of amplifier U3; the output of amplifier U3 is connected with the base stage of triode T; relay K is connected to the emitter of triode T, and the normal opened contact of relay K is connected to the power control terminal of controlled motor.When work, in the time being greater than the threshold voltage signal of setting by the maximum voltage signal of maximum extraction circuit output, comparator U3 output low level signal, triode T conducting, the coil of relay K obtains electric, the normally-closed contact of relay K is disconnected, motor control loop power-off, controlled motor is quit work, thus effective guarantee the safe operation of motor.
Claims (7)
1. a motor stator winding heat protection control device; it is characterized in that it extracts circuit by temperature measurement circuit, amplifying circuit and maximum and protection control circuit forms; the temperature-sensing element of described temperature measurement circuit is located at the end of motor stator winding initial and end; the signal of telecommunication of temperature measurement circuit output connects the input of protection control circuit through amplifying circuit and maximum extraction circuit, the control signal of protection control circuit output connects the power control terminal of controlled motor.
2. motor stator winding heat protection control device according to claim 1; it is characterized in that described temperature measurement circuit is six groups of the identical parallel join of structure; one phase winding of the corresponding motor stator of every two groups of circuit, the temperature-sensing element of temperature measurement circuit is located at respectively the end of motor stator winding initial and end.
3. motor stator winding heat protection control device according to claim 1 and 2; it is characterized in that described temperature measurement circuit is made up of temperature-sensing element resistance R t, R1～R7 and amplifier U1; temperature-sensing element resistance R t and resistance R 1～R3 Compositional balance bridge circuit; the output of balance bridge circuit is connected with the input of amplifier U1 through resistance R 4, R6, and resistance R 5 forms the feedback loop of amplifier U1.
4. motor stator winding according to claim 1 heat protection control device, is characterized in that described amplifying circuit is six groups of the identical parallel join of structure, the input of every group of amplifying circuit respectively with the corresponding connection of output of temperature measurement circuit.
5. motor stator winding heat protection control device according to claim 4; it is characterized in that described amplifying circuit is made up of amplifier U2 and resistance R 8～R11; resistance R 8 is the input current-limiting resistance of amplifier U1, and resistance R 9 and R10 form the feedback loop of amplifier U2.
6. motor stator winding heat protection control device according to claim 1; it is characterized in that described maximum extraction circuit is made up of diode D1～D6 and resistance R 12; diode D1～D6 parallel join, its input respectively with the corresponding connection of output of amplifying circuit.
7. motor stator winding heat protection control device according to claim 1; it is characterized in that described protection control circuit is made up of amplifier U3, triode T and resistance R 13～R15 and relay K; resistance R 13～R15 forms the threshold voltage loop of amplifier U3; the output in this loop is connected with the input of amplifier U3; the output of amplifier U3 is connected with the base stage of triode T, and relay K is connected to the emitter of triode T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420094905.5U CN203859496U (en) | 2014-03-04 | 2014-03-04 | Motor stator winding heat protection control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420094905.5U CN203859496U (en) | 2014-03-04 | 2014-03-04 | Motor stator winding heat protection control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203859496U true CN203859496U (en) | 2014-10-01 |
Family
ID=51609335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420094905.5U Ceased CN203859496U (en) | 2014-03-04 | 2014-03-04 | Motor stator winding heat protection control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203859496U (en) |
-
2014
- 2014-03-04 CN CN201420094905.5U patent/CN203859496U/en not_active Ceased
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HEBEI NEWSTAR ELECTRIC MOTOR CO., LTD. Free format text: FORMER NAME: HEBEI XINSIDA MOTOR MANUFACTURING CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 052160 Shijiazhuang Airport Road, Gaocheng City, Hebei province (Gaocheng Town Industrial Zone comprehensive garden) Patentee after: HEBEI NEWSTAR ELECTRIC MOTOR CO., LTD. Address before: 052160 Shijiazhuang Airport Road, Gaocheng City, Hebei province (Gaocheng Town Industrial Zone comprehensive garden) Patentee before: HEBEI XINSIDA MOTOR MANUFACTURING CO., LTD. |
|
| IW01 | Full invalidation of patent right | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20210902 Decision number of declaring invalidation: 51693 Granted publication date: 20141001 |