CN204650336U - A kind of frequency converter control panel debug circuit - Google Patents
A kind of frequency converter control panel debug circuit Download PDFInfo
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- CN204650336U CN204650336U CN201520246816.2U CN201520246816U CN204650336U CN 204650336 U CN204650336 U CN 204650336U CN 201520246816 U CN201520246816 U CN 201520246816U CN 204650336 U CN204650336 U CN 204650336U
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- optocoupler
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- electric capacity
- phase current
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Abstract
The utility model relates to converter technology field, discloses a kind of frequency converter control panel debug circuit.Comprise U phase current circuit, V phase current circuit and W phase current circuit, described U phase current circuit, V phase current circuit are consistent with the structure of W phase current circuit, include bridge arm circuit and lower bridge arm circuit; Wherein, described upper bridge arm circuit comprises the first resistance, the second resistance, the 3rd resistance, the first electric capacity, the second electric capacity and the first optocoupler; Described lower bridge arm circuit comprises the 4th resistance, the 5th resistance, the 6th resistance, the 3rd electric capacity, the 4th electric capacity and the second optocoupler; The output terminal emitter of described first optocoupler is connected an output terminal jointly with the output terminal collector of the second optocoupler.The utility model according to the PWM ripple controlling to export, can directly generate corresponding frequency and the AC regeneration current signal of amplitude, reoffers to control electric current so that the closed-loop regulation of electric current, thus has deducted difficulty and the risk factor of upper machine debugging.
Description
Technical field
The utility model relates to converter technology field, more particularly, and particularly a kind of frequency converter control panel debug circuit.
Background technology
Frequency converter is the on-off action utilizing power semiconductor device, regulates mains frequency to regulate a kind of control device of motor speed.Frequency control has speed-regulating range width, and adjusting speed accuracy is high, and dynamic response is fast, and low speed torque is good, saves energy, the advantages such as work efficiency is high, easy to use.Application frequency control, not only can make motor run under energy-conservation rotating speed, but also greatly can improve the control accuracy of motor speed, lifting process quality and production efficiency.
In frequency convertor system structure, control panel is one of important parts, and wherein namely the most important is the closed-loop regulation of electric current.And for current debugging tool, the method for potentiometer can only be provided, and regulate DC current to feed back to power panel, can not real time modelling curent change and amplitude, so can not dynamic adjustments.Therefore, the debug circuit of a kind of frequency converter control panel of necessary design.
Utility model content
The purpose of this utility model is to provide a kind of frequency converter control panel debug circuit, this circuit can according to the PWM ripple controlling to export, directly generate corresponding frequency and the AC regeneration current signal of amplitude, reoffer to control electric current so that the closed-loop regulation of electric current, thus deducted difficulty and the risk factor of upper machine debugging.
In order to achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of frequency converter control panel debug circuit, comprise U phase current circuit, V phase current circuit and W phase current circuit, described U phase current circuit, V phase current circuit are consistent with the structure of W phase current circuit, include bridge arm circuit and lower bridge arm circuit;
Wherein, described upper bridge arm circuit comprises the first resistance, second resistance, 3rd resistance, first electric capacity, second electric capacity and the first optocoupler, one end of described first resistance is connected with+5V power supply, its other end is connected with the input anode of the first optocoupler, between the input anode that described first electric capacity is connected to the first optocoupler and input cathode, the input cathode of described first optocoupler is also connected with the first control end, described second resistance one end is connected with+15V power supply, the other end is connected with the output terminal collector of the first optocoupler, described second electric capacity is connected between the output terminal collector of the first optocoupler and output terminal emitter, described 3rd resistance and the second Capacitance parallel connection,
Described lower bridge arm circuit comprises the 4th resistance, 5th resistance, 6th resistance, 3rd electric capacity, 4th electric capacity and the second optocoupler, described 4th resistance one end be connected with+5V power supply, its other end is connected with the input anode of the second optocoupler, between the input anode that described 3rd electric capacity is connected to the second optocoupler and input cathode, the input cathode of described second optocoupler is also connected with the second control end, described 5th resistance one end is connected with+15V power supply, the other end is connected with the output terminal emitter of the second optocoupler, described 4th electric capacity is connected between the output terminal collector of the second optocoupler and output terminal emitter, described 6th resistance and the 4th Capacitance parallel connection,
The output terminal emitter of described first optocoupler is connected an output terminal jointly with the output terminal collector of the second optocoupler.
Preferably, described output terminal is also by one the 5th capacity earth.
Compared with prior art, the utility model has the advantage of: the utility model can according to the PWM ripple controlling to export, directly generate corresponding frequency and the AC regeneration current signal of amplitude, reoffer to control electric current so that the closed-loop regulation of electric current, thus deducted difficulty and the risk factor of upper machine debugging.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the electrical schematic diagram of power-supply system frequency converter control panel debug circuit of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, to make advantage of the present utility model and feature can be easier to be readily appreciated by one skilled in the art, thus more explicit defining is made to protection domain of the present utility model.
Consult shown in Fig. 1, the utility model provides a kind of frequency converter control panel debug circuit, comprise U phase current circuit, V phase current circuit and W phase current circuit, described U phase current circuit, V phase current circuit are consistent with the structure of W phase current circuit, include bridge arm circuit and lower bridge arm circuit.
In the utility model, described upper bridge arm circuit comprises the first resistance R24, second resistance R34, 3rd resistance R36, first electric capacity C10, second electric capacity C16 and the first optocoupler U5, one end of described first resistance R24 is connected with+5V power supply, its other end is connected with the input anode of the first optocoupler U5, between the input anode that described first electric capacity C10 is connected to the first optocoupler U5 and input cathode, the input cathode of described first optocoupler U5 is also connected with the first control end DU+, described second resistance R34 one end is connected with+15V power supply, the other end is connected with the output terminal collector of the first optocoupler U5, between the output terminal collector that described second electric capacity C16 is connected to the first optocoupler U5 and output terminal emitter, described 3rd resistance R36 is in parallel with the second electric capacity C16.
In the utility model, described lower bridge arm circuit comprises the 4th resistance R25, 5th resistance R35, 6th resistance R37, 3rd electric capacity C11, 4th electric capacity C17 and the second optocoupler U6, described 4th resistance R25 one end be connected with+5V power supply, its other end is connected with the input anode of the second optocoupler U6, between the input anode that described 3rd electric capacity C11 is connected to the second optocoupler U6 and input cathode, the input cathode of described second optocoupler U6 is also connected with the second control end DU-, described 5th resistance R35 one end is connected with+15V power supply, the other end is connected with the output terminal emitter of the second optocoupler U6, between the output terminal collector that described 4th electric capacity C17 is connected to the second optocoupler U6 and output terminal emitter, described 6th resistance R37 is in parallel with the 4th electric capacity C17.
The output terminal emitter of described first optocoupler U5 is connected an output terminal IU_2 jointly with the output terminal collector of the second optocoupler U6.
In the utility model, described output terminal IU_2 is also by one the 5th electric capacity C20 ground connection.
+ 15V power supply ,-15V power supply is the part that working plate has had, and Fig. 1 only lists the generating mode of U phase current, in fact V phase current, and W phase current is also identical with U phase current.First control end DU+ and the second control end DU-is Low level effective.
Theoretical and the general procedure mode according to Electric Machine Control, the first control end DU+ and the second control end DU-is symmetrical complement.That is: PWM carrier wave is 10K, then the cycle of the first control end DU+ and the second control end DU-is 100us; If do not consider dead band, the complementary meaning is exactly: if the pulse duty factor of the first control end DU+ is 1%, i.e. 1us, then the second control end DU-'s is 99%, both 99us, and frequency converter regulates non-standard output signal exactly, realizes the output of alternating current.
The principle of work of the frequency converter control panel debug circuit of the present utility model shown in Fig. 1 is:
When shutdown and PWM no-output, output terminal IU_2 be+15V and-15V by the mid point of resistance R34, R35, R36, R37, be 0V.
And in actual motion, Water demand two trend, that is: the dutycycle of the first control end DU+ increases to 100% from 0%, and due to the second control end DU-because be complementary, its dutycycle is reduced to 0% from 100% certainly.When upper bridge first control end DU+ output duty cycle is 25%, the output of lower bridge second control end DU-is 75%, DU+, DU-export effective time, optocoupler U5, U6 conducting can be controlled, then optocoupler U5, U6 outgoing side resistance R36, R37 can be shorted.Because DU+, DU-are complementary, can not export effective value, then, when DU+ conducting, because resistance R36 is shorted, dividing potential drop can be biased to more than 0V simultaneously, and when both having realized DU+ output, electric current is just.But the output of DU+ can be fallen by the output offset of DU-, so as DU+%>DU-%, output current is just.As DU+%<DU-%, output current is negative.Wherein electric capacity C17, C16 plays the effect of smoothing current signal.And the output of IU_2, to the ADC of current detecting, namely can realize closed loop detect and control.
The utility model, through the demonstration of too much group experiment, according to output frequency size, can show different electric current, can realize the adjustment of current closed-loop, realize the frequency reducing of overcurrent, also can verify output phase shortage.
Although describe embodiment of the present utility model by reference to the accompanying drawings; but patent owner can make various distortion or amendment within the scope of the appended claims; as long as be no more than the protection domain described by claim of the present utility model, all should within protection domain of the present utility model.
Claims (2)
1. a frequency converter control panel debug circuit, it is characterized in that: comprise U phase current circuit, V phase current circuit and W phase current circuit, described U phase current circuit, V phase current circuit are consistent with the structure of W phase current circuit, include bridge arm circuit and lower bridge arm circuit;
Wherein, described upper bridge arm circuit comprises the first resistance, second resistance, 3rd resistance, first electric capacity, second electric capacity and the first optocoupler, one end of described first resistance is connected with+5V power supply, its other end is connected with the input anode of the first optocoupler, between the input anode that described first electric capacity is connected to the first optocoupler and input cathode, the input cathode of described first optocoupler is also connected with the first control end, described second resistance one end is connected with+15V power supply, the other end is connected with the output terminal collector of the first optocoupler, described second electric capacity is connected between the output terminal collector of the first optocoupler and output terminal emitter, described 3rd resistance and the second Capacitance parallel connection,
Described lower bridge arm circuit comprises the 4th resistance, 5th resistance, 6th resistance, 3rd electric capacity, 4th electric capacity and the second optocoupler, described 4th resistance one end be connected with+5V power supply, its other end is connected with the input anode of the second optocoupler, between the input anode that described 3rd electric capacity is connected to the second optocoupler and input cathode, the input cathode of described second optocoupler is also connected with the second control end, described 5th resistance one end is connected with+15V power supply, the other end is connected with the output terminal emitter of the second optocoupler, described 4th electric capacity is connected between the output terminal collector of the second optocoupler and output terminal emitter, described 6th resistance and the 4th Capacitance parallel connection,
The output terminal emitter of described first optocoupler is connected an output terminal jointly with the output terminal collector of the second optocoupler.
2. frequency converter control panel debug circuit according to claim 1, is characterized in that: described output terminal is also by one the 5th capacity earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520246816.2U CN204650336U (en) | 2015-04-22 | 2015-04-22 | A kind of frequency converter control panel debug circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520246816.2U CN204650336U (en) | 2015-04-22 | 2015-04-22 | A kind of frequency converter control panel debug circuit |
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| CN204650336U true CN204650336U (en) | 2015-09-16 |
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| CN201520246816.2U Withdrawn - After Issue CN204650336U (en) | 2015-04-22 | 2015-04-22 | A kind of frequency converter control panel debug circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793687A (en) * | 2015-04-22 | 2015-07-22 | 广州三晶电气有限公司 | Debugging circuit of control panel of frequency converter |
-
2015
- 2015-04-22 CN CN201520246816.2U patent/CN204650336U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793687A (en) * | 2015-04-22 | 2015-07-22 | 广州三晶电气有限公司 | Debugging circuit of control panel of frequency converter |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 Guangzhou high tech Industrial Development Zone, Guangdong Science City, litchi Road, No. 9 Patentee after: GUANGZHOU SANJING ELECTRIC CO., LTD. Address before: 510663 Guangzhou high tech Industrial Development Zone, Guangdong Science City, litchi Road, No. 9 Patentee before: Guangzhou Sanjing Electric Co., Ltd. |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150916 Effective date of abandoning: 20160824 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |