CN202333794U - Energy backward-flowing detection absorption device for motor/wire cutter - Google Patents
Energy backward-flowing detection absorption device for motor/wire cutter Download PDFInfo
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- CN202333794U CN202333794U CN201120466038XU CN201120466038U CN202333794U CN 202333794 U CN202333794 U CN 202333794U CN 201120466038X U CN201120466038X U CN 201120466038XU CN 201120466038 U CN201120466038 U CN 201120466038U CN 202333794 U CN202333794 U CN 202333794U
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Abstract
The utility model discloses an energy backward-flowing detection absorption device for a motor/wire cutter. The energy backward-flowing detection absorption device comprises a voltage sampling unit, a comparing unit, a reference voltage generating circuit, a driving circuit and an absorbing circuit, wherein the comparing unit comprises a comparer; and the absorbing circuit comprises a controllable electronic switching device and an unloading resistor. According to the energy backward-flowing detection absorption device disclosed by the utility model, the voltage of an inversion preceding-stage direct-current bus of the motor/wire cutter is detected and sampled in real time by using the voltage sampling unit, and the voltage value comparison is carried out by the comparer of the comparing unit to control the driving circuit to drive the controllable electronic switching device to be switched on or off, so as to control the unloading resistor to unload or not. The energy backward-flowing detection absorption device can accurately control the unloading quantity, so that the voltage jump of the inversion preceding-stage direct-current bus or the instantaneous overload of a preceding-stage circuit of the motor/wire cutter can be effectively prevented, and the service life of a capacitor can be prolonged; and therefore, an entire grid system can be ensured to be safe and reliable.
Description
Technical field
The utility model relates to the anti-absorption plant of irritating of a kind of energy, particularly relates to a kind of anti-detection absorption plant of irritating of energy of motor/wire cutting machine.
Background technology
Along with continuous progress in science and technology; Industry mesohigh line load is that the heavy mechanical equipment of perception is more and more many; Therefore be directed against the high voltage switchgear of inductive load equipment; Carry out the electric elements type selecting and just seem particularly important with configuration, the comparatively high-end inductive load in many application scenarios also need use UPS (Uninterruptible Power Supply, uninterrupted power supply) that continual power supply is provided for it.For protective circuit device and equipment are avoided superpotential impact, the prevention circuits device is impaired or prolong useful life of UPS, to electric elements type selecting and configuration require increasingly highly, thereby increasing advanced technology is applied in the industry.The energy of the inductive load of prior art is counter, and to irritate the circuit diagram of inhaling device as shown in Figure 1, its inverter circuit that is connected with inductive load 1 ' anodal DC+ and the negative pole DC-of prime DC bus-bar voltage between the piezo-resistance R that is connected in parallel to capacitor C and has unloading function.During inductive load 2 ' operation or braking; Energy is from inductive load 2 ' feed back to DC side; Cause the voltage of the capacitor C of DC side sharply to raise; Thereby the magnitude of voltage that causes the capacitor C two ends is too high and the front stage circuits momentary overload of capacitor C, and then has had a strong impact on the useful life of capacitor C, and makes whole network system have the risk that possibly cause system blackout.This device adopts piezo-resistance R with unloading function that the prominent high voltage at its capacitor C two ends is carried out off-load; Though the magnitude of voltage of the capacitor C of DC side is remained in certain scope; Whether but this device can not detect the terminal voltage of DC side real-time and accurately occurs can not controlling the off-load amount of piezo-resistance R exactly unusually.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art; A kind of anti-detection absorption plant of irritating of energy of motor/wire cutting machine is provided; It can detect the voltage at the electric capacity two ends of DC side in real time, and controls the off-load amount exactly, possesses characteristics simple in structure, dependable performance.
The utility model solves the technical scheme that its technical problem adopted: the anti-detection absorption plant of irritating of a kind of energy of motor/wire cutting machine comprises the absorption circuit; Also comprise voltage sample unit, comparing unit, drive circuit and reference voltage generating circuit, comparing unit comprises comparator; The inversion prime DC bus-bar voltage of motor/wire cutting machine is gathered in the voltage sample unit; The output of voltage sample unit is connected to the in-phase input end of comparator; The output of reference voltage generating circuit is connected to the inverting input of comparator, and the output of comparator is connected to the input of drive circuit; Absorb circuit and comprise controllable type electronic switching device and off-load resistance; The output of drive circuit is connected to the control end of controllable type electronic switching device; One end of controllable type electronic switching device is connected with an end of off-load resistance; The other end of off-load resistance connects the positive pole of the inversion prime DC bus-bar voltage that is connected with motor/wire cutting machine, and the other end of controllable type electronic switching device connects the negative pole of the inversion prime DC bus-bar voltage that is connected with motor/wire cutting machine.
Also comprise a reset circuit, the output of this reset circuit is connected to the inverting input of said comparator.
Said voltage sample unit comprises first resistance and second resistance; One end of first resistance and an end of second resistance constitute two inputs of said voltage sample unit respectively; And one of first resistance is connected to the positive pole of the inversion prime DC bus-bar voltage that is connected with motor/wire cutting machine, and one of second resistance is connected to the negative pole of the inversion prime DC bus-bar voltage that is connected with motor/wire cutting machine; The other end of the other end of first resistance and second resistance is connected to form the output of said voltage sample unit, and is connected to the in-phase input end of said comparator.
Said comparing unit also comprises one the 3rd resistance, the power supply of an end connection+12V of the 3rd resistance, and the other end of the 3rd resistance connects the output of said comparator.
The anti-detection absorption plant of irritating of the energy of a kind of motor/wire cutting machine of the utility model; Between the positive pole of the inversion prime DC bus-bar voltage that is connected with motor/wire cutting machine and negative pole, be connected in parallel to electric capacity; Send to the comparator of comparing unit after the magnitude of voltage that its voltage sample unit feeds back to the electric capacity two ends of DC side to inductive load (motor/wire cutting machine etc.) is sampled, comparator is compared the reference voltage value that the magnitude of voltage and the reference voltage generating circuit at electric capacity two ends produces.When the magnitude of voltage at electric capacity two ends is higher than reference voltage value; The voltage at expression dc bus capacitor two ends is in abnormality; Thereby comparator sends a signal of telecommunication to drive circuit; Make drive circuit carry out signal of telecommunication adjustment back and send a drive signal and give and absorb circuit and control the controllable type electronic switching device that absorbs in the circuit and be conducting state, and realize absorbing circuit and the prominent high-tension absorption at electric capacity two ends is unloaded put.When the magnitude of voltage at electric capacity two ends is lower than reference voltage value; The magnitude of voltage at expression dc bus capacitor two ends is in normal condition; Do not influence systematic function; Thereby comparator sends a signal of telecommunication and gives drive circuit, make drive circuit carry out signal of telecommunication adjustment back and send drive signal and give and absorb circuit control controllable type electronic switching device and be cut-off state, thereby absorption plant not being absorbed unload puts action.
The anti-detection absorption plant of irritating of the energy of a kind of motor/wire cutting machine of the utility model; As a kind of preferred; Its inverting input at comparator has also connected a reset circuit, is used to prevent that the anti-absorption plant of irritating of energy from producing misoperation in the moment of open and close machine, promptly; When inductive load energized or deenergization, utilize reset circuit that device is carried out initialization or reset operation.
Compare with the anti-absorption plant of irritating of the energy of prior art; The beneficial effect of the utility model is; (1) owing to comprise voltage sample unit, comparing unit, reference voltage generating circuit, drive circuit, comparing unit comprises comparator, and the absorption circuit comprises controllable type electronic switching device and off-load resistance; Make the utility model can utilize voltage to adopt the unit that the magnitude of voltage at the electric capacity two ends of DC side is detected in real time; And utilize the conducting of comparator, drive circuit control controllable type electronic switching device or end the unlatching of controlling absorption plant or close, thereby realize in real time, accurately controlling the off-load amount, efficiently solve the prominent high problem of capacitance voltage; (2) owing to also comprise a reset circuit, make the utility model can be when the absorption plant switching on and shutting down to each unit of device carrying out initialization or reset, thereby realize the accuracy of absorption plant operation; (3) the utility model also has characteristics such as simple, the required cost of circuit structure is low, practical, applied widely, dependable performance.
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain; But the anti-detection absorption plant of irritating of the energy of a kind of motor/wire cutting machine of the utility model is not limited to embodiment.
Description of drawings
Fig. 1 is the anti-electrical block diagram of irritating absorption plant of the energy of prior art;
Fig. 2 is the electrical block diagram of the utility model.
Embodiment
Embodiment sees also shown in Figure 2ly, and the anti-detection absorption plant of irritating of the energy of a kind of motor/wire cutting machine of the utility model comprises voltage sample unit 3, comparing unit 4, reference voltage generating circuit 7, drive circuit 5 and absorbs circuit 6.Comparing unit 4 comprises comparator IC1 and the 3rd resistance R 3; The power supply of one end connection+12V of the 3rd resistance R 3, the other end of the 3rd resistance R 3 connects the output of comparator IC1.The prime DC bus-bar voltage of the inverter circuit 1 of motor/wire cutting machine is gathered in voltage sample unit 3; The output of voltage sample unit 3 is connected to the in-phase input end of comparator IC1; The output of reference voltage generating circuit 7 is connected to the inverting input of comparator IC1, and the output of comparator IC1 is connected to the input of drive circuit 5.Absorb circuit 6 and comprise controllable type electronic switching device Q1 and off-load resistance R 4; The output of drive circuit 5 is connected to the control end of this controllable type electronic switching device Q1; The end of controllable type electronic switching device Q1 is connected with an end of off-load resistance R 4; The other end of off-load resistance R 4 connects the anodal DC+ of the prime DC bus-bar voltage of the inverter circuit 1 that is connected with motor/wire cutting machine, and the other end of controllable type electronic switching device Q1 connects the negative pole DC-of the prime DC bus-bar voltage of the inverter circuit 1 that is connected with motor/wire cutting machine.
As a preferred embodiment, the utility model also comprises a reset circuit 8, is used to prevent that the anti-absorption plant of irritating of energy from producing misoperation in the moment of switching on and shutting down, and the output of this reset circuit 8 is connected to the inverting input of comparator IC1.
As a preferred embodiment; Above-mentioned voltage sample unit 3 comprises first resistance R 1 and second resistance R 2; One end of one end of first resistance R 1 and second resistance R 2 constitutes two inputs of voltage sample unit 4 respectively; And one of first resistance R 1 is connected to the anodal DC+ of the prime DC bus-bar voltage of the inverter circuit 1 that is connected with motor/wire cutting machine, and one of second resistance R 2 is connected to the negative pole DC-of the prime DC bus-bar voltage of the inverter circuit 1 that is connected with motor/wire cutting machine; The other end of the other end of first resistance R 1 and second resistance R 2 is connected to form the output of voltage sample unit 3, and is connected to the in-phase input end of comparator IC1.
The anti-detection absorption plant of irritating of the energy of a kind of motor/wire cutting machine of the utility model; Between the anodal DC+ of the prime DC bus-bar voltage of the inverter circuit that is connected with motor/wire cutting machine 1 and negative pole DC-, be connected with capacitor C 1, the back level of inverter circuit 1 connects inductive load 2 (motor/wire cutting machine etc.).When inductive load 2 energized or deenergization, utilize counter each unit that detects absorption plant of irritating of 8 pairs of energy of reset circuit to carry out initialization or reset operation, avoid the anti-detection absorption plant of irritating of energy to produce misoperation at this moment.
During inductive load 2 operations or braking; Energy feeds back to the capacitor C 1 of DC side from the inductive load side, and at this moment, voltage sample unit 3 carries out dividing potential drop through first resistance R 1 and second resistance R 2; And the magnitude of voltage at detected electric capacity two ends delivered to comparator IC1; Simultaneously, reference voltage generating circuit 7 is delivered to comparator IC1 with the reference voltage value that is produced, and comparator IC1 is compared the magnitude of voltage and the reference voltage value at capacitor C 1 two ends.If the magnitude of voltage at capacitor C 1 two ends is greater than reference voltage value; The voltage of then representing dc bus capacitor C1 two ends is in abnormality; Signal of telecommunication of comparator IC1 output this moment is given drive circuit 5; Make 5 pairs of signals of telecommunication of drive circuit adjust the back and send drive signal to absorbing circuit control controllable type electronic switching device Q1; Then this controllable type electronic switching device Q1 is conducting state, and end electric current of its charged resistance R4 that unloads increases, and makes the voltage at capacitor C 1 two ends of 4 pairs of DC sides of off-load resistance R absorb to unload and puts.If the magnitude of voltage at capacitor C 1 two ends is less than reference voltage value; The voltage of then representing capacitor C 1 two ends is in normal condition, does not influence systematic function, at this moment; Signal of telecommunication of comparator IC1 output is given drive circuit 5; Make drive circuit 5 carry out signal of telecommunication adjustment back and send drive signal and give and absorb circuit control controllable type electronic switching device Q1 and be cut-off state, and its end electric current of unloading charged resistance R4 goes to zero, make off-load resistance R 4 not absorb action the voltage at capacitor C 1 two ends.
The anti-detection absorption plant of irritating of the energy of a kind of motor/wire cutting machine of the utility model; It adopts the magnitude of voltage of the capacitor C 1 of the 3 pairs of DC sides in voltage sample unit to detect in real time; Whether the off-load that the conducting of employing comparator IC1, drive circuit 5 control controllable type electronic switching device Q1 or cut-off state are controlled off-load resistance R 4; Thereby it can control the off-load amount exactly; Thereby the prominent high problem of the voltage that efficiently solves inductive load side Voltage Feedback to DC side, and help prolonging useful life of electric capacity, guarantee that whole network system is safe and reliable.
The foregoing description only is used for further specifying the anti-detection absorption plant of irritating of energy of a kind of motor/wire cutting machine of the utility model; But the utility model is not limited to embodiment; Every technical spirit according to the utility model all falls in the protection range of the utility model technical scheme any simple modification, equivalent variations and modification that above embodiment did.
Claims (4)
1. the anti-detection absorption plant of irritating of the energy of a motor/wire cutting machine comprises the absorption circuit; It is characterized in that: also comprise voltage sample unit, comparing unit, drive circuit and reference voltage generating circuit, comparing unit comprises comparator; Said absorption circuit comprises controllable type electronic switching device and off-load resistance; The inversion prime DC bus-bar voltage of motor/wire cutting machine is gathered in the voltage sample unit; The output of voltage sample unit is connected to the in-phase input end of comparator; The output of reference voltage generating circuit is connected to the inverting input of comparator, and the output of comparator is connected to the input of drive circuit; The output of drive circuit is connected to the control end of controllable type electronic switching device; One end of controllable type electronic switching device is connected with an end of off-load resistance; The other end of off-load resistance connects the positive pole of the inversion prime dc bus that is connected with motor/wire cutting machine, and the other end of controllable type electronic switching device connects the negative pole of the inversion prime DC bus-bar voltage that is connected with motor/wire cutting machine.
2. the anti-detection absorption plant of irritating of the energy of motor/wire cutting machine according to claim 1, it is characterized in that: also comprise a reset circuit, the output of this reset circuit is connected to the inverting input of said comparator.
3. the anti-detection absorption plant of irritating of the energy of motor/wire cutting machine according to claim 1 and 2; It is characterized in that: said voltage sample unit comprises first resistance and second resistance; One end of first resistance and an end of second resistance constitute two inputs of said voltage sample unit respectively; And one of first resistance is connected to the positive pole of the inversion prime DC bus-bar voltage that is connected with motor/wire cutting machine, and one of second resistance is connected to the negative pole of the inversion prime DC bus-bar voltage that is connected with motor/wire cutting machine; The other end of the other end of first resistance and second resistance is connected to form the output of said voltage sample unit, and is connected to the in-phase input end of said comparator.
4. the anti-detection absorption plant of irritating of the energy of motor/wire cutting machine according to claim 1 and 2; It is characterized in that: said comparing unit also comprises the 3rd resistance; The power supply of one end connection+12V of the 3rd resistance, the other end of the 3rd resistance connects the output of said comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120466038XU CN202333794U (en) | 2011-11-21 | 2011-11-21 | Energy backward-flowing detection absorption device for motor/wire cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120466038XU CN202333794U (en) | 2011-11-21 | 2011-11-21 | Energy backward-flowing detection absorption device for motor/wire cutter |
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| CN202333794U true CN202333794U (en) | 2012-07-11 |
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|---|---|---|---|
| CN201120466038XU Expired - Lifetime CN202333794U (en) | 2011-11-21 | 2011-11-21 | Energy backward-flowing detection absorption device for motor/wire cutter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887973A (en) * | 2012-12-24 | 2014-06-25 | 中兴通讯股份有限公司 | Method and system controlling reverse current to generate power tube voltage stress |
| CN106712484A (en) * | 2016-12-15 | 2017-05-24 | 宁波央腾汽车电子有限公司 | Backward flowing current absorption circuit under motor load |
| CN108599128A (en) * | 2018-07-09 | 2018-09-28 | 珠海格力电器股份有限公司 | A kind of excess voltage protection and compressor with the circuit and air conditioner |
| CN110492455A (en) * | 2019-08-19 | 2019-11-22 | 浙江大学 | A kind of adjustable counter electromotive force absorbing circuit of threshold value |
-
2011
- 2011-11-21 CN CN201120466038XU patent/CN202333794U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887973A (en) * | 2012-12-24 | 2014-06-25 | 中兴通讯股份有限公司 | Method and system controlling reverse current to generate power tube voltage stress |
| CN103887973B (en) * | 2012-12-24 | 2018-07-06 | 中兴通讯股份有限公司 | Reverse irrigated current is controlled to generate the method and system of power tube voltage stress |
| CN106712484A (en) * | 2016-12-15 | 2017-05-24 | 宁波央腾汽车电子有限公司 | Backward flowing current absorption circuit under motor load |
| CN108599128A (en) * | 2018-07-09 | 2018-09-28 | 珠海格力电器股份有限公司 | A kind of excess voltage protection and compressor with the circuit and air conditioner |
| CN110492455A (en) * | 2019-08-19 | 2019-11-22 | 浙江大学 | A kind of adjustable counter electromotive force absorbing circuit of threshold value |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |
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| CX01 | Expiry of patent term |