CN109873571A - A kind of general inverter and its control method - Google Patents
A kind of general inverter and its control method Download PDFInfo
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Abstract
A kind of general inverter and its control method, comprising: transformer circuit, rectifier circuit, filter circuit, full-bridge inverting output unit and inversion control unit；One end of the transformer circuit is electrically connected with one end of the rectifier circuit, the other end of the rectifier circuit is electrically connected with one end of the filter circuit, the other end of the filter circuit is electrically connected with one end of the full-bridge inverting output unit, and the another end of the filter circuit is electrically connected with one end of the inversion control unit；The inversion control unit is for controlling transformer circuit, and the invention inversion efficiency is high, and the unique design of inversion control unit substantially increases the transformation efficiency of electric energy；Transformer winding utilization rate is higher, so that equipment is made the best use of everything；It is versatile, the light switching in inversion source can be realized by multiplication of voltage relational design mechanism.
Description
Technical field
The invention patent relates to inverter circuit design field, especially a kind of general inverter and its control method.
Background technique
In country's work and home life, usually using power supply adaptor the case where commonplace such as common pen
Remember this power supply adaptor etc., the principle of power supply adaptor is exactly the rectification circuit design often mentioned in electricity, simplest not mistake
In classical bridge rectifier, AC conversion easily can be the DC power supply of people's needs by it, and is applied,
But in many technical fields, people are also required to being converted to direct current into alternating current use, and corresponding, inverter circuit just generates
, and inverter circuit equipment, it is integrated with filtering, logic control and rectifier bridge, therefore by its aggregate usually as finished product inversion
Device is sold, referring to shown in Fig. 3；
Inverter is that direct current energy, such as dry cell, battery are transformed into alternating current；Popular says, inverter is one
Kind converts direct current (DC) in the device of alternating current (AC)；It is widely used in air-conditioning, home theater, electric wheel, electronic work
Tool, sewing machine, DVD, VCD, computer, TV, washing machine, smoke exhaust ventilator, refrigerator, video recorder, massager, fan, illumination etc.；More
Briefly, inverter is exactly a kind of electronics that low pressure (12 volts or 24 volts or 48 volts) direct current is changed into 220 volts of alternating currents
Equipment；We are in the epoch of one " movement ", mobile office, mobile communication, mobile leisure and amusement.In mobile state
In, people not only need the low-voltage DC supplied by battery or storage battery, while with greater need for we in surroundings can not or
220 volts of scarce alternating currents, inverter can meet our this demand；
But there are following design defect and deficiencies for existing inverter:
1. inverter efficiency is to be improved: inverter itself will also consume a part of electric power at work, therefore, it
Input power is greater than its output power；
2. transformer winding utilization rate is not high in inverter, there are idle；
3. poor universality: in the prior art, every inverter, which has, accesses DC voltage numerical value, such as 12V, 24V, 48V etc.,
It is required that selection battery voltage must be consistent with inverter DC input voitage；For example, 12V inverter must select 12V electric power storage
Pond；It causes many constant in use process；There is not an effective, simple, reliable circuit design and realizes general-purpose interface
Switching；
Summary of the invention
It is an object of the present invention to provide a kind of general inverter and its control method, solves inverter in the prior art
Working efficiency is high, poor universality deficiency by the Reliable Design of control relay circuit considerably increases transformer winding
Utilization rate, structure is simple, easy to maintain, energy conservation and environmental protection.
A kind of general inverter, comprising: transformer circuit, rectifier circuit, filter circuit, full-bridge inverting output unit and
Inversion control unit；One end of the transformer circuit is electrically connected with one end of the rectifier circuit, the rectifier circuit
The other end be electrically connected with one end of the filter circuit, the other end of the filter circuit and the full-bridge inverting output unit
One end electrical connection, the another end of the filter circuit is electrically connected with one end of the inversion control unit；
Further, single winding transformer inverter circuit, two-winding transformer inversion electricity can be used in the transformer circuit
The mixed structure circuit design of road or the two；
Further, the rectifier circuit is using three groups of rectifier circuit structure designs；
Illustrate as an example, in three groups of rectifier bridges, every group of rectifier bridge constitutes rectifier bridge using 4 diodes；
Further, the filter circuit uses two groups of filter capacitor structures；
Further, the full-bridge inverting output unit is for exporting alternating current；
Further, the inversion control unit is for controlling transformer circuit, comprising: inverter controller, relay and
Driving switch, the inverter controller also can control the actuation of the relay to operate for controlling inverter circuit logic control；
A kind of control method of general inverter, includes the following steps:
Step 1: transformer high-voltage uses double-winding structure；
When for inversion 12V DC electricity, in use, relay works, connecting driving switch switching winding is to be used in series；
The design of this structure can obviously increase output voltage, and without consuming additional electrical energy；
When being used for inversion 24V direct current in use, relay does not work, driving switch resets, and winding parallel uses；This knot
Structure design can obviously increase output power；
Using the multiplication of voltage relationship of 12V, 24V, transformer is made full use of, transformer winding can be used, equipment is not caused
Idle and waste of energy；
Step 2: transformer high-voltage uses simplex winding；
When being used for inversion 12V DC power supply in use, relay works, driving switch switching allows transformer series to use,
Increase output voltage；
When being used for inversion 24V DC power supply in use, relay does not work, driving switch resets transformers connected in parallel and uses,
Increase output power；
Using 12V, 24V multiplication of voltage relationship, transformer is made full use of, waste of resource is not caused；
Beneficial effects of the present invention:
1. inversion efficiency is high, the unique design of inversion control unit substantially increases the transformation efficiency of electric energy；
2. transformer winding utilization rate is higher, so that equipment is made the best use of everything；
3. it is versatile, the light switching in inversion source can be realized by multiplication of voltage relational design mechanism；
Detailed description of the invention
Fig. 1 is that the circuit design of the single phase transformer double-winding structure of a kind of general inverter of the present invention and its control method is former
Reason figure (12V/24V)
Fig. 2 is that the circuit of the dual transformer simplex winding structural circuit of a kind of general inverter of the present invention and its control method is set
It counts schematic diagram (12V/24V)
Fig. 3 is the prior art inversion design circuit diagram of a kind of general inverter of the present invention and its control method
Fig. 4 is that the circuit design of the single phase transformer double-winding structure of a kind of general inverter of the present invention and its control method is former
Reason figure (48V/60V)
Fig. 5 is that the circuit of the dual transformer double-winding structure circuit of a kind of general inverter of the present invention and its control method is set
It counts schematic diagram (48V/60V)
Specific embodiment
With reference to the accompanying drawing to a preferred embodiment of the present invention will be described in detail.
Referring to figs. 1 to shown in Fig. 2, a kind of general inverter, comprising: transformer circuit 101, rectifier circuit 102, filtering
Circuit 103, full-bridge inverting output unit 104 and inversion control unit 105；One end of the transformer circuit 101 with it is described whole
One end electrical connection of bridge circuit 102 is flowed, the other end of the rectifier circuit 102 and one end of the filter circuit 103 are electrically connected
It connects, the other end of the filter circuit 103 is electrically connected with one end of the full-bridge inverting output unit 104, the filter circuit
103 another end is electrically connected with one end of the inversion control unit 105；
Further, single winding transformer inverter circuit, two-winding transformer inversion can be used in the transformer circuit 101
The mixed structure circuit design of circuit or the two；
Further, the rectifier circuit 102 is using three groups of rectifier circuit structure designs；
Illustrate as an example, in three groups of rectifier bridges, every group of rectifier bridge constitutes rectifier bridge using 4 diodes；
Further, the filter circuit 103 uses two groups of filter capacitor structures；
Further, the full-bridge inverting output unit 104 is for exporting alternating current；
Further, the inversion control unit 105 is for controlling transformer circuit 101, comprising: inverter controller, after
Electric appliance and driving switch, the inverter controller are used to control the actuation behaviour of inverter circuit logic control and the control relay
Make；
A kind of control method of general inverter, includes the following steps:
Step 1: high voltage side of transformer uses double-winding structure；
When for inversion 12V DC electricity, in use, relay works, connecting driving switch switching winding is to be used in series；
The design of this structure can obviously increase output voltage, and without consuming additional electrical energy；
When being used for inversion 24V direct current in use, relay does not work, driving switch resets, and winding parallel uses；This knot
Structure design can obviously increase output power；
Using the multiplication of voltage relationship of 12V, 24V, transformer is made full use of, transformer winding can be used, equipment is not caused
Idle and waste of energy；
Step 2: transformer high-voltage uses simplex winding；
When being used for inversion 12V DC power supply in use, relay works, driving switch switching allows transformer series to use,
Increase output voltage；
When being used for inversion 24V DC power supply in use, relay does not work, driving switch resets transformers connected in parallel and uses,
Increase output power；
Using 12V, 24V multiplication of voltage relationship, transformer is made full use of, waste of resource is not caused；
Design principle in order to better illustrate the present invention, preferred design circuit of now illustrating are as follows:
It is shown referring to Fig.1 as a kind of preferred circuit design example: a kind of general inverter, including high frequency transformer T1,
The pin 1 of high frequency transformer T1 concatenates the drain D of field-effect tube Q1, the source of the source S connection field-effect tube Q2 of field-effect tube Q1
Pole S connects power cathode, and the drain D of field-effect tube Q2 connects the pin 6 of high frequency transformer T1, the pin 2 of high frequency transformer T1 with draw
Foot 5 connects positive pole, and the pin 4 of high frequency transformer T1 is connect with pin 7 by K2, the pin 8 of high frequency transformer T1
The pin 1 of bridge rectifier diode D2 is connect, the pin 2 of rectifier diode D1 is electrically connected with the pin 1 of full-bridge inverter U1, rectification
The pin 4 of diode D1 is electrically connected with the pin 2 of full-bridge inverter U1, the 1 serial capacitance C1 of pin of full-bridge inverter U1 and complete
The pin 2 of bridge inverter U1 connects；The pin 4 of bridge rectifier diode D1 is electrically connected with the pin 4 of bridge rectifier diode D2,
The pin 2 of bridge rectifier diode D2 is electrically connected with the pin 1 of full-bridge inverter U1, the pin 4 of bridge rectifier diode D2 with
The pin 2 of full-bridge inverter U1 is electrically connected, and the pin 7 of high frequency transformer T1 is electrically connected with the pin 3 of bridge rectifier diode D2；
The pin 4 of high frequency transformer T1 is electrically connected with the pin 3 of relay K2 and bridge rectifier diode D1；The pin 1 of relay K2
It is electrically connected with the pin 1 of inverter controller U2, the pin 2 of relay K2 is electrically connected with the pin 2 of inverter controller U2, inversion control
The pin 3 of device U2 processed is electrically connected with the pin 2 of bridge rectifier diode D3, the pin 4 of bridge rectifier diode D3 and inversion control
The pin 4 of device U2 processed is electrically connected, and the 3 serial capacitance C2 of pin of inverter controller U2 is electrically connected with the pin 4 of inverter controller U2；
The pin 1 of bridge rectifier diode D3 is electrically connected with the pin 9 of high frequency transformer T1, the pin 3 of bridge rectifier diode D3 with
The pin 10 of high frequency transformer T1 is electrically connected；Double winding is used by using single high frequency transformer T1, high frequency transformer T1, when
For 12V in use, relay K2 is controlled by inverter controller U2, relay K2 switching allows the pin 4 and T1 of high frequency transformer T1
Pin 7 be electrically connected, as 24V in use, relay K2 switching allow high frequency transformer T1 pin 4 and T1 pin 7 disconnect, around
Group individually rectifies used in parallel, increases output power.
As a kind of preferred circuit design example, referring to shown in Fig. 2: a kind of dual transformer formula inverter control circuit, including
The pin 1 of transformer T3, transformer T3 concatenate the drain D of field-effect tube Q1, and the source S of field-effect tube Q1 concatenates field-effect tube Q2
Source S connect power cathode, the drain D of field-effect tube Q2 connects the pin 6 of transformer T3,5 electricity of pin 2 and pin of transformer T3
Positive pole is connect, the pin 3 of transformer T3 connects the pin 1 of bridge rectifier diode D1, and bridge rectifier diode D1's draws
Foot 2 is electrically connected with the pin 1 of full-bridge inverter U1, and the pin 4 of transformer T3 is electrically connected with the pin 3 of rectifier diode D1.Bridge
The pin 4 of formula rectifier diode D1 is connect with the pin 2 of full-bridge inverter U1, the 1 serial capacitance C1 of pin of full-bridge inverter U1
It is connect with the pin 2 of full-bridge inverter U1；The pin 7 of transformer T3 is electrically connected with the pin 1 of rectifier diode D2, transformer T3
Pin 8 be electrically connected with the pin 3 of rectifier diode D2, the pin 1 of the pin 2 of rectifier diode D2 and inverter controller U2 connect
It connects, the pin 4 of rectifier diode D2 is connect with the pin 2 of inverter controller U2, the 1 serial capacitance C2 of pin of inverter controller U2
It is connect with the pin 2 of inverter controller U2；The pin 3 of inverter controller U2 is electrically connected with the pin 1 of relay K2, inversion control
The pin 4 of device U2 is electrically connected with the pin 2 of relay K2, and the pin 4 and relay K2 of transformer T3 are with rectifier diode D3's
Pin 1 connects；The pin 2 of rectifier diode D1 is connect with the pin 2 of rectifier diode D3, and the pin 2 of rectifier diode D3 is gone here and there
Capacitor C3 is met to be electrically connected with the pin 4 of rectifier diode D3, capacitor C3+end be electrically connected with the pin 1 of full-bridge inverter U1；It is whole
The pin 1 of stream diode D3 is electrically connected with the pin 3 of transformer T4, the pin 3 of rectifier diode D3 and the pin 4 of transformer T4
Electrical connection；By using the transformer T3 and transformer T4 of high pressure simplex winding, as 12V in use, inverter controller U2 control after
Electric appliance K2 is electrically connected the pin 4 of transformer T3 with the pin 3 of transformer T4, and allowing transformer T3 and transformer T4 to connect makes
With, as 24V in use, relay K2 does not work, transformer T3 and transformer T4 are used in parallel, using 12/24V multiplication of voltage relationship,
Transformer is made full use of, is not resulted in waste of resources.
As a kind of preferred circuit design example, referring to shown in Fig. 4: a transformer type inverter control circuit, including height
The pin 1 of frequency power transformer T1, high frequency transformer T1 concatenate the drain D of field-effect tube Q1, the source S concatenation field effect of field-effect tube Q1
Should the source S of pipe Q2 connect power cathode, the drain D of field-effect tube Q2 connects the pin 6 of high frequency transformer T1, high frequency transformer T1's
Pin 2 is electrically connected with pin 5 and connects positive pole, and the pin 4 of high frequency transformer T1 is electrically connected with pin 7, high frequency transformer T1's
Pin 8 connects the pin 3 of bridge rectifier diode D1, and the pin 2 of rectifier diode D1 is electrically connected with the pin 1 of full-bridge inverter U1
It connects, the pin 4 of rectifier diode D1 is electrically connected with the pin 2 of full-bridge inverter U1,1 serial capacitance of pin of full-bridge inverter U1
C1 is connect with the pin 2 of full-bridge inverter U1；The pin 1 of bridge rectifier diode D1 passes through relay K2 and high frequency transformer T1
Pin 3 or high frequency transformer T1 pin 7 connect；The pin 1 of relay K2 is electrically connected with the pin 1 of inverter controller U2,
The pin 2 of relay K2 is electrically connected with the pin 2 of inverter controller U2, the pin 3 and rectifier diode D2 of inverter controller U2
Pin 2 connect, the pin 4 of inverter controller U2 connect with the pin 4 of rectifier diode D2, the pin 3 of inverter controller U2
Serial capacitance C2 is connect with the pin 4 of inverter controller U2, the pin 1 of rectifier diode D2 and the pin 9 of high frequency transformer T1
Electrical connection, the pin 3 of rectifier diode D2 are electrically connected with the pin 10 of high frequency transformer T1；Become by using doublewound high frequency
Depressor T1 increases output voltage as 48V in use, relay K2 switches to high-voltage winding, as 60V in use, relay K2 not
Work, default access low pressure winding, realizes voltage switching, stabilizes the output voltage；
When being used for inversion 48V DC power supply in use, relay works, driving switch switches to high-voltage winding, increases defeated
Voltage out；When being used for inversion 60V DC power supply in use, relay does not work, driving switch resets default access low pressure winding,
Virtual voltage switching, stabilizes the output voltage；
As a kind of preferred circuit design example, referring to Figure 5: a kind of dual transformer formula inverter control circuit, including
The pin 1 of high frequency transformer T1 and high frequency transformer T2, high frequency transformer T1 concatenate the drain D of field-effect tube Q1, field-effect tube
The source S of the source S concatenation field-effect tube Q2 of Q1 connects power cathode, and the drain D of field-effect tube Q2 connects drawing for high frequency transformer T1
Foot 6, the pin 2 of high frequency transformer T1 is electrically connected with pin 5 connects positive pole, and pin 4 and the pin 7 of high frequency transformer T1 is electrically connected
It connects, the pin 8 of high frequency transformer T1 connects the pin 1 of bridge rectifier diode D1, two poles of pin 2 and rectification of rectifier diode D1
The pin 2 of pipe D2 is electrically connected, and the pin 4 of rectifier diode D1 is electrically connected with the pin 2 of full-bridge inverter U1, rectifier diode D1
Pin 3 concatenate the contact K1-1 of dpdt relay K1, the contact K1-1 of dpdt relay K1 and high frequency transformer
The pin 3 or pin 7 of T1 is electrically connected；The pin 2 of rectifier diode D2 is electrically connected with the pin 1 of full-bridge inverter U1, rectification two
The pin 4 of pole pipe D2 is electrically connected with the pin 2 of full-bridge inverter U1, the 1 serial capacitance C1 of pin and full-bridge of full-bridge inverter U1
The pin 2 of inverter U1 connects；The pin 1 of rectifier diode D2 concatenates the contact K1-2 of dpdt relay K1, and double-pole is double
The contact K1-2 of relay K1 is thrown to be electrically connected with the pin 3 of high frequency transformer T2 or pin 4, the pin 3 of rectifier diode D2 with
The pin 8 of high frequency transformer T2 is electrically connected, and the pin 4 of high frequency transformer T2 is electrically connected with pin 7, the pin of high frequency transformer T2
The source S of the drain D of 1 concatenation field-effect tube Q3, the source S concatenation field-effect tube Q4 of field-effect tube Q3 connects power cathode, field effect
Should the drain D of pipe Q4 connect the pin 6 of high frequency transformer T2, the pin 2 of high frequency transformer T2 is electrically connected with pin 5 is connecing power supply just
Pole；The pin 1 of dpdt relay K1 is electrically connected with the pin 1 of inverter controller U2, the pin 2 of dpdt relay K1
It is electrically connected with the pin 2 of inverter controller U2, the pin 3 of inverter controller U2 is electrically connected with the pin 2 of rectifier diode D3, inverse
Become controller U2 pin 4 be electrically connected with the pin 4 of rectifier diode D3, the 3 serial capacitance C2 of pin of inverter controller U2 and
The pin 4 of inverter controller U2 is electrically connected, and the pin 1 of rectifier diode D3 connects the pin 9 of high frequency transformer T2, rectifies two poles
The pin 3 of pipe D3 connects the pin 10 of high frequency transformer T2；The high frequency transformer T1 of the dual transformer formula inverter control circuit and
High frequency transformer T2 is all made of double winding, can control two transformers or even number transformer using dpdt relay K1,
Realize powerful switching, inverter controller U2 controls dpdt relay K1 work, as 48V in use, double-pole double throw after
The contact K1-1 of electric appliance K1 is electrically connected with the pin 3 of high frequency transformer T1, the contact K1-2 of dpdt relay K1 and high frequency
The pin 3 of transformer T2 is electrically connected, and increases output voltage, and as 60V in use, dpdt relay K1 does not work, double-pole is double
The contact the K1-1 default for throwing relay K1 is electrically connected with the pin 7 of high frequency transformer T1, the K1-2 touching of dpdt relay K1
Point default is electrically connected with the pin 4 of high frequency transformer T2, therefore can realize that voltage switching stabilizes the output voltage, and makes full use of transformation
Device and relay, so that resource is fully used；Using dpdt relay, dual transformer or even number transformation are controlled
Device, practical high-power switching, as 48V in use, relay synchronism switching increases output voltage to high-voltage winding；When 60V is used
When, relay does not work, and defaults synchronous access low pressure winding, and virtual voltage switching stabilizes the output voltage, makes full use of transformer
And relay, make full use of resource；
The invention inversion efficiency is high, and the unique design of inversion control unit substantially increases the transformation efficiency of electric energy；Transformation
Device winding utilization is higher, so that equipment is made the best use of everything；It is versatile, inversion source can be realized by multiplication of voltage relational design mechanism
Easily switching；
It is above-described to be merely a preferred embodiment of the present invention, it should be understood that the explanation of above embodiments is only used
In facilitating the understanding of the method and its core concept of the invention, it is not intended to limit the scope of protection of the present invention, it is all of the invention
Any modification for being made within thought and principle, equivalent replacement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of general inverter characterized by comprising transformer circuit, rectifier circuit, filter circuit, full-bridge inverting
Output unit and inversion control unit；One end of the transformer circuit is electrically connected with one end of the rectifier circuit, described
The other end of rectifier circuit is electrically connected with one end of the filter circuit, and the other end of the filter circuit and the full-bridge are inverse
Become one end electrical connection of output unit, the another end of the filter circuit is electrically connected with one end of the inversion control unit；Institute
Inversion control unit is stated for controlling transformer circuit, comprising: inverter controller, relay and driving switch, the inversion control
Device processed also can control the actuation of the relay to operate for controlling inverter circuit logic control.
2. a kind of general inverter according to claim 1, which is characterized in that the transformer circuit is simplex winding transformation
The mixed structure circuit design of device inverter circuit, two-winding transformer inverter circuit or the two.
3. a kind of general inverter according to claim 2, which is characterized in that the rectifier circuit uses three groups of rectifications
The design of bridge circuit structure.
4. a kind of general inverter according to claim 3, which is characterized in that in three groups of rectifier bridges, every group of rectification
Bridge constitutes rectifier bridge using 4 diodes.
5. a kind of general inverter according to claim 4, which is characterized in that the filter circuit uses two groups of filtered electricals
Hold structure.
6. a kind of general inverter according to claim 5, which is characterized in that the full-bridge inverting output unit is for defeated
Alternating current out.
7. a kind of control method of general inverter, which comprises the steps of:
Step 1: transformer high-voltage uses double-winding structure；
When for inversion 12V DC electricity, in use, relay works, connecting driving switch switching winding is to be used in series；When with
In inversion 24V direct current in use, relay does not work, driving switch resets, and winding parallel uses；
Step 2: transformer high-voltage uses simplex winding；
When being used for inversion 12V DC power supply in use, relay works, driving switch switching allows transformer series to use；When with
In inversion 24V DC power supply in use, relay does not work, driving switch resets transformers connected in parallel and uses.
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Application publication date: 20190611 |
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