CN104935150A - Frequency converter - Google Patents
Frequency converter Download PDFInfo
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- CN104935150A CN104935150A CN201510329031.6A CN201510329031A CN104935150A CN 104935150 A CN104935150 A CN 104935150A CN 201510329031 A CN201510329031 A CN 201510329031A CN 104935150 A CN104935150 A CN 104935150A
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Abstract
The invention provides a frequency converter, comprising a power transformer, a first rectifier module, a second rectifier module, a relay and a hand control end. The power transformer comprises a primary coil, a first secondary coil connected with the primary coil, and a secondary coil which is isolated with the primary coil. The first secondary coil is connected with the relay via the first rectifier module; the second secondary coil is connected with the hand control end via the second rectifier module; the two rectifier modules use same rectifying circuit. The rectifying circuit comprises a first diode, a second diode, a capacitor, a first inductor and a second inductor; the cathodes of the two diodes are connected with one end of the capacitor; the other end of the capacitor is connected with the anode of the first diode and is connected with the anode of the second diode via the second inductor; the anodes of the two diodes are connected with two ends of the secondary coil; the two ends of the capacitor is connected with the relay or the hand control end. The frequency converter of the invention could be used for preventing the potential of the hand control end of the frequency converter from being changed into strong electricity.
Description
Technical field
The present invention relates to converter technique field, particularly relate to a kind of frequency converter.
Background technology
In frequency converter, the voltage due to relay is direct current 24V, and it usually and frequency converter is manual holds a shared 24V power supply.But, because relay and manual end share a power supply, so insulation between the coil and contact of relay destroyed after, relay coil will current potential same with the forceful electric power of relay contact, thus can the manual current potential held also will be forceful electric power, if user touches manual end just may cause accidental shock accident.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of frequency converter, can prevent the current potential of frequency converter manual control end from becoming forceful electric power.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of frequency converter, comprise power transformer, first rectification module, second rectification module, relay and manual end, described power transformer comprises primary coil, first secondary coil and second subprime coil, described first secondary coil is connected with described primary coil, described second subprime coil and described primary coil isolated, described primary coil is used for input power, described first rectification module is connected with described first secondary coil, described relay is connected with described first rectification module, described second rectification module is connected with described second subprime coil, described manual control end is connected with described second rectification module, described first rectification module and described second rectification module adopt identical rectification circuit, described rectification circuit comprises the first diode, second diode, electric capacity, first inductance and the second inductance, the negative pole of described first diode is connected one end of described electric capacity with the negative pole of described second diode, the other end of described electric capacity is connected the positive pole of described first diode by described first inductance and is connected the positive pole of described second diode by described second inductance, the positive pole of described first diode and the positive pole of described second diode are used for being connected with the two ends of described first secondary coil or being connected with the two ends of described second subprime coil, the two ends of described electric capacity are used for being connected with described relay or holding with described manual control being connected, to hold output voltage to described relay or described manual control.
Preferably, described first diode and described second diode are Schottky diode.
Preferably, the inductance value of described first inductance and described second inductance is equal.
Preferably, the voltage that described electric capacity exports to described relay or described manual control end is 24V.
Be different from the situation of prior art, the invention has the beneficial effects as follows: two secondary coils are set in power transformer, two secondary coils couple with relay and manual end respectively, for relay and manual control are held independently-powered, thus can prevent the current potential of frequency converter manual control end from becoming forceful electric power, in addition, owing to have employed relay and manual end connects with identical rectification circuit, the structure of circuit can be simplified, reduce power consumption.
Accompanying drawing explanation
Fig. 1 is the circuit theory schematic diagram of embodiment of the present invention frequency converter.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 1, it is the circuit theory schematic diagram of embodiment of the present invention frequency converter.The frequency converter of the present embodiment comprises power transformer 1, first rectification module 2, second rectification module 3, relay 4 and manual end 5.
Wherein, power transformer 1 comprises primary coil L1, the first secondary coil L21 and second subprime coil L22, first secondary coil L21 is connected with primary coil L1, second subprime coil L22 and primary coil L1 is isolated, primary coil L1 is used for input power Ui, first rectification module 2 is connected with the first secondary coil L21, relay 4 is connected with the first rectification module 2, second rectification module 3 is connected with second subprime coil L22, manual end 5 is connected with the second rectification module 3, and the first rectification module 2 and the second rectification module 3 adopt identical rectification circuit.This rectification circuit comprises the first diode D1, second diode D2, electric capacity C, first inductance L 3 and the second inductance L 4, the negative pole of the first diode D1 is connected one end of electric capacity C with the negative pole of the second diode D2, the other end of electric capacity C is connected the positive pole of the first diode D1 by the first inductance L 3 and is connected the positive pole of the second diode D2 by the second inductance L 4, the positive pole of the first diode D1 and the positive pole of the second diode D2 are used for being connected with the two ends of the first secondary coil L21 or being connected with the two ends of second subprime coil L22, the two ends of electric capacity C are used for being connected with relay 4 or being connected with manual control end 5, to hold 5 output voltages to relay 4 or manual control.
In the present embodiment, the first diode D1 and the second diode D2 is Schottky diode.The inductance value of the first inductance L 3 and the second inductance L 4 is equal.The voltage that electric capacity C exports to relay 4 or manual end 5 is 24V.
Because relay 4 is powered by the first rectification module 2, manual end 5 is powered by the second rectification module 3, so the power supply of relay 4 and manual end 5 is two separate power supplys.In addition, because the first secondary coil L21 is that armature winding L1 is connected, be equivalent to a part of armature winding L1, so the 24V direct voltage being supplied to relay 4 after the first rectification module 2 rectification belongs to forceful electric power, and second subprime coil L22 and armature winding L1 is isolated, so the 24V direct voltage being supplied to manual end 5 after the second rectification module 3 rectification belongs to light current, therefore, the current potential of manual end 5 can not become forceful electric power, reaches the object preventing the current potential of frequency converter manual control end from becoming forceful electric power.
Further, rectification circuit is in the positive half cycle valid period of each work period, voltage between the positive pole and the positive pole of the second diode D2 of the first diode D1 is timing, first diode D1 forward conduction, second diode D2 oppositely ends, and the first diode D1 is in rectification and afterflow operating state simultaneously.First inductance L 3 is by the first diode D1, path continuous current discharge electricity.The electric current of the second inductance L 4 flows through between the positive pole of the first diode D1 and the positive pole of the second diode D2, forms closed-loop path with the first diode D1, electric capacity C.Output current is the summation of the current dc component of the first inductance L 3 and the second inductance L 4.That is, within the positive half cycle valid period, only flow through the half of load current, because this reducing power consumption, circuit is also simplified.
By the way, the frequency converter of the embodiment of the present invention arranges two secondary coils in power transformer, two secondary coils couple with relay and manual end respectively, for relay and manual control are held independently-powered, thus can prevent the current potential of frequency converter manual control end from becoming forceful electric power, in addition, owing to have employed relay and manual end connects with identical rectification circuit, the structure of circuit can be simplified, reduce power consumption.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. a frequency converter, it is characterized in that, comprise power transformer, first rectification module, second rectification module, relay and manual end, described power transformer comprises primary coil, first secondary coil and second subprime coil, described first secondary coil is connected with described primary coil, described second subprime coil and described primary coil isolated, described primary coil is used for input power, described first rectification module is connected with described first secondary coil, described relay is connected with described first rectification module, described second rectification module is connected with described second subprime coil, described manual control end is connected with described second rectification module, described first rectification module and described second rectification module adopt identical rectification circuit, described rectification circuit comprises the first diode, second diode, electric capacity, first inductance and the second inductance, the negative pole of described first diode is connected one end of described electric capacity with the negative pole of described second diode, the other end of described electric capacity is connected the positive pole of described first diode by described first inductance and is connected the positive pole of described second diode by described second inductance, the positive pole of described first diode and the positive pole of described second diode are used for being connected with the two ends of described first secondary coil or being connected with the two ends of described second subprime coil, the two ends of described electric capacity are used for being connected with described relay or holding with described manual control being connected, to hold output voltage to described relay or described manual control.
2. frequency converter according to claim 1, is characterized in that, described first diode and described second diode are Schottky diode.
3. frequency converter according to claim 1, is characterized in that, the inductance value of described first inductance and described second inductance is equal.
4. frequency converter according to claim 1, is characterized in that, the voltage that described electric capacity exports to described relay or described manual control end is 24V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510329031.6A CN104935150A (en) | 2015-06-15 | 2015-06-15 | Frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510329031.6A CN104935150A (en) | 2015-06-15 | 2015-06-15 | Frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104935150A true CN104935150A (en) | 2015-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510329031.6A Pending CN104935150A (en) | 2015-06-15 | 2015-06-15 | Frequency converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258916A (en) * | 2018-01-15 | 2018-07-06 | 淮阴师范学院 | A kind of frequency converter and its control circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223083A (en) * | 2011-06-15 | 2011-10-19 | 深圳市英威腾电气股份有限公司 | Frequency converter |
| CN104143924A (en) * | 2014-08-18 | 2014-11-12 | 浙江易控电子科技有限公司 | Low-cost frequency converter |
| CN104158282A (en) * | 2014-07-22 | 2014-11-19 | 苏州汇川技术有限公司 | Dual-circuit switching control power circuit and high-voltage inverter |
| CN204138062U (en) * | 2014-10-15 | 2015-02-04 | 重庆红岩建设机械制造有限责任公司 | A kind of variable frequency lifting device |
| CN104467465A (en) * | 2013-09-22 | 2015-03-25 | 梁懿 | Dual-half wave rectifying circuit for bridge type switching power supply |
-
2015
- 2015-06-15 CN CN201510329031.6A patent/CN104935150A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223083A (en) * | 2011-06-15 | 2011-10-19 | 深圳市英威腾电气股份有限公司 | Frequency converter |
| CN104467465A (en) * | 2013-09-22 | 2015-03-25 | 梁懿 | Dual-half wave rectifying circuit for bridge type switching power supply |
| CN104158282A (en) * | 2014-07-22 | 2014-11-19 | 苏州汇川技术有限公司 | Dual-circuit switching control power circuit and high-voltage inverter |
| CN104143924A (en) * | 2014-08-18 | 2014-11-12 | 浙江易控电子科技有限公司 | Low-cost frequency converter |
| CN204138062U (en) * | 2014-10-15 | 2015-02-04 | 重庆红岩建设机械制造有限责任公司 | A kind of variable frequency lifting device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258916A (en) * | 2018-01-15 | 2018-07-06 | 淮阴师范学院 | A kind of frequency converter and its control circuit |
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Application publication date: 20150923 |
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| RJ01 | Rejection of invention patent application after publication |