CN201590774U - Autobalance control device for output of inverter - Google Patents
Autobalance control device for output of inverter Download PDFInfo
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- CN201590774U CN201590774U CN2009203170422U CN200920317042U CN201590774U CN 201590774 U CN201590774 U CN 201590774U CN 2009203170422 U CN2009203170422 U CN 2009203170422U CN 200920317042 U CN200920317042 U CN 200920317042U CN 201590774 U CN201590774 U CN 201590774U
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- operational amplifier
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- inverter
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Abstract
The utility model discloses an autobalance control device for output of an inverter, which comprises positive and negative half-wave drive shaping circuits, a filter circuit and a comparison integer circuit. The outputs of the positive and negative half-wave drive shaping circuits are connected to the input of the filter circuit. The output of the filter circuit is connected to the input of the comparison integer circuit. The control device can solve the problem of balancing the output current of the inverter rapidly and prevent the inverter from malfunction due to increased component of output direct current of the inverter, thereby ensuring reliable operation of the inverter and safety of the load. In addition, the protective device further has the advantages of simple circuit structure and low cost.
Description
Technical field
The utility model relates to the inverter field, especially relates to a kind of inverter output automatic-balancing controller that can carry out the real-time closed-loop feedback to the SPWM drive signal.
Background technology
At present, the inverter balance controller of prior art mainly is the output current that utilizes current sample device sampling inverter, compares, controls and regulate according to the output current situation of being sampled again.But this control mode has tangible hysteresis effect, when monitoring circuit monitors when unusual, electric current is magnetic bias often, at this moment transformer, power device will be subjected to very strong stress impact, even inverter be burnt when serious, and bring safety problem to load.
The utility model content
The purpose of this utility model is to overcome the deficiency of prior art, a kind of inverter output automatic-balancing controller is provided, this control device not only can be adjusted in real time to the electric current magnetic bias that causes because of laod unbalance, can also in time solve the balance problem out of control that is caused because of the drift of the device property of SPWM generator.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of inverter output automatic-balancing controller, and it drives shaping circuit, filter circuit and comparison integrating circuit by positive and negative half-wave and forms; The output of positive and negative half-wave driving shaping circuit is connected to the input of filter circuit; The output of filter circuit is connected to the input of comparison integrating circuit.
Described positive and negative half-wave drives shaping circuit by being used for realizing that two inputs that positive half wave drives shaping are with door IC1A be used for realizing that two inputs that negative half-wave drives shaping form with a door IC1B; Two inputs are provided with three pins with door IC1A, and its 1st pin and the 2nd pin connect two drive signals of inverter positive half wave respectively, and its 3rd pin connects an input of filter circuit; Two inputs are provided with three pins with door IC1B, and its 5th pin and the 6th pin connect two drive signals of the negative half-wave of inverter respectively, and its 4th pin connects another input of filter circuit.
Described filter circuit is made of two tunnel filtering; First via filtering is by resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 1 and operational amplifier IC2A form, operational amplifier IC2A is provided with three pins, its the 1st pin, between the 2nd pin and connecting resistance R2 and capacitor C 1, the end of while the 2nd pin connecting resistance R1, another termination of resistance R 1 just, negative half-wave drives an output of shaping circuit, connect again behind the 3rd pin connecting resistance R4 of operational amplifier IC2A+power supply of 6V, the end of operational amplifier IC2A the 1st pin connecting resistance R3, the other end of resistance R 3 is exported the positive half wave filtering signal, and signal is sent an input of comparison integrating circuit; The second tunnel filtering is by resistance R 5, resistance R 6, resistance R 7, resistance R 8, capacitor C 2 and operational amplifier IC2B form, operational amplifier IC2B is provided with three pins, the 6th pin, between the 7th pin and connecting resistance R6 and capacitor C 2, the end of while the 6th pin connecting resistance R5, another termination of resistance R 5 just, negative half-wave drives another output of shaping circuit, connect again behind operational amplifier IC2B the 5th pin connecting resistance R8+power supply of 6V, the end of the 7th pin connecting resistance R7 of operational amplifier IC2B, the half-wave filtering signal is born in the other end output of resistance R 7, and signal is sent another input of comparison integrating circuit.
Described relatively integrating circuit is made of resistance R 9, resistance R 10, resistance R 11, capacitor C 3, capacitor C 4 and operational amplifier IC2C; Operational amplifier IC2C is provided with three pins, between its 8th pin, the 9th pin and connecting resistance R10 and capacitor C 3, the 9th pin connects the positive half wave filtering signal of filter circuit simultaneously, resistance R 9 and capacitor C 4 also connect the 10th pin that back one is terminated at operational amplifier IC2C, the other end is connected to+power supply of 6V, the end of the 8th pin connecting resistance R11 of operational amplifier IC2C, the other end of resistance R 11 are made as conditioning signal output.
The beneficial effects of the utility model are, owing to adopt positive and negative half-wave to drive shaping circuit the positive and negative half-wave drive signal of inverter is carried out shaping, and adopt filter circuit to carry out filtering, so that original SPWM signal is transferred to is direct current signal, adopt the integration comparison circuit that this direct current signal is compared at last, to judge whether inverter current magnetic bias takes place, and under the situation of inverter current generation magnetic bias, export a control signal, regulate the action of positive and negative half-wave drive signal difference to control four tunnel driving SPWM wave producers; Therefore, the equilibrium problem of the output current that this control device can the quick adjustment inverter, and prevent that the situation that inverter breaks down because of output DC component strengthens from occurring, thus guarantee the reliability service of inverter and the safety of load.In addition, this protective device also has simple, the lower-cost characteristics of circuit structure.
Below in conjunction with drawings and Examples the utility model is described in further detail; But a kind of inverter output automatic-balancing controller of the present utility model is not limited to embodiment.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is a circuit connection diagram of the present utility model.
Embodiment
Embodiment sees also shown in Figure 1ly, and a kind of inverter output automatic-balancing controller of the present utility model comprises that positive and negative half-wave drives shaping circuit 1, filter circuit 2 and integrating circuit 3 relatively; The output of positive and negative half-wave driving shaping circuit 1 is connected to the input of filter circuit 2; The output of filter circuit 2 is connected to the input of comparison integrating circuit 3.
Wherein,
See also shown in the left part of Fig. 2, positive and negative half-wave drives shaping circuit 1 by being used for realizing that two inputs that positive half wave drives shaping are with door IC1A be used for realizing that two inputs that negative half-wave drives shaping form with a door IC1B; Two inputs are provided with three pins with door IC1A, and its 1st pin and the 2nd pin meet two drive signal DR2, DR3 of inverter positive half wave respectively, and its 3rd pin connects an input of filter circuit 2; Two inputs are provided with three pins with door IC1B, and its 5th pin and the 6th pin meet two drive signal DR1, DR4 of the negative half-wave of inverter respectively, and its 4th pin connects another input of filter circuit 2;
See also shown in the mid portion of Fig. 2, filter circuit 2 is made of two tunnel filtering; Wherein, first via filtering is made up of resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 1 and operational amplifier IC2A; Operational amplifier IC2A is provided with three pins, between its 1st pin, the 2nd pin and connecting resistance R2 and capacitor C 1, and the end of the 2nd pin connecting resistance R1 simultaneously, the positive and negative half-wave of another termination of resistance R 1 drives the 3rd pin of shaping circuit 1; Connect again behind the 3rd pin connecting resistance R4 of operational amplifier IC2A+power supply of 6V, the end of the 1st pin connecting resistance R3 of operational amplifier IC2A, the other end output positive half wave filtering signal of resistance R 3, and signal is sent an input of comparison integrating circuit 3; The second tunnel filtering is made up of resistance R 5, resistance R 6, resistance R 7, resistance R 8, capacitor C 2 and operational amplifier IC2B; Operational amplifier IC2B is provided with three pins, between its 6th pin, the 7th pin and connecting resistance R6 and capacitor C 2, and the end of the 6th pin connecting resistance R5 simultaneously, the positive and negative half-wave of another termination of resistance R 5 drives the 4th pin of shaping circuit 1; Connect again behind the 5th pin connecting resistance R8 of operational amplifier IC2B+power supply of 6V, the end of the 7th pin connecting resistance R7 of operational amplifier IC2B, the negative half-wave filtering signal of other end output of resistance R 7, and signal is sent another input of comparison integrating circuit 3;
Shown in the right side that sees also Fig. 2 was divided, relatively integrating circuit 3 was made of resistance R 9, resistance R 10, resistance R 11, capacitor C 3, capacitor C 4 and operational amplifier IC2C; Operational amplifier IC2C is provided with three pins, and between its 8th pin, the 9th pin and connecting resistance R10 and capacitor C 3, the 9th pin connects the positive half wave filtering signal of filter circuit 2 simultaneously; Resistance R 9 and capacitor C 4 also connect the 10th pin that back one is terminated at operational amplifier IC2C, the power supply of another termination+6V; The end of the 8th pin connecting resistance R11 of operational amplifier IC2C, the other end of resistance R 11 are made as conditioning signal output, and give four tunnel driving SPWM wave producers with this conditioning signal.
A kind of inverter output automatic-balancing controller of the present utility model, its concrete course of work is: positive half wave drive signal DR2, DR3 and negative half-wave drive signal DR1, DR4 are after positive and negative half-wave drives shaping circuit 1 shaping, send in the filter circuit 2, original SPWM signal is converted into direct current signal gives again in the comparison integrating circuit 3 and compare; In case inverter current generation magnetic bias, the direct current signal level after then positive half wave drive signal DR2, DR3 and negative half-wave drive signal DR1, DR4 transform is compared and will be there are differences with normal direct current signal level; Relatively integrating circuit 3 detects measures of dispersion, and export a control signal according to this measures of dispersion and be used to control four the road and drive the SPWM wave producers, regulate positive half wave drive signal DR2, DR3 and negative half-wave drive signal DR1, DR4, measures of dispersion is gone to zero, so that the output circuit of inverter tends to balance.
The foregoing description only is used for further specifying a kind of inverter output automatic-balancing controller of the present utility model; but the utility model is not limited to embodiment; every foundation technical spirit of the present utility model all falls in the protection range of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (4)
1. an inverter is exported automatic-balancing controller, it is characterized in that: it drives shaping circuit, filter circuit and comparison integrating circuit by positive and negative half-wave and forms; The output of positive and negative half-wave driving shaping circuit is connected to the input of filter circuit; The output of filter circuit is connected to the input of comparison integrating circuit.
2. inverter according to claim 1 output automatic-balancing controller is characterized in that: described positive and negative half-wave drives shaping circuit by being used for realizing that two inputs that positive half wave drives shaping are with door IC1A be used for realizing that two inputs that negative half-wave drives shaping form with a door IC1B; Two inputs are provided with three pins with door IC1A, and its 1st pin and the 2nd pin connect two drive signals of inverter positive half wave respectively, and its 3rd pin connects an input of filter circuit; Two inputs are provided with three pins with door IC1B, and its 5th pin and the 6th pin connect two drive signals of the negative half-wave of inverter respectively, and its 4th pin connects another input of filter circuit.
3. inverter output automatic-balancing controller according to claim 1, it is characterized in that: described filter circuit is made of two tunnel filtering; First via filtering is by resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 1 and operational amplifier IC2A form, operational amplifier IC2A is provided with three pins, its the 1st pin, between the 2nd pin and connecting resistance R2 and capacitor C 1, the end of while the 2nd pin connecting resistance R1, another termination of resistance R 1 just, negative half-wave drives an output of shaping circuit, connect again behind the 3rd pin connecting resistance R4 of operational amplifier IC2A+power supply of 6V, the end of operational amplifier IC2A the 1st pin connecting resistance R3, the other end of resistance R 3 is exported the positive half wave filtering signal, and signal is sent an input of comparison integrating circuit; The second tunnel filtering is by resistance R 5, resistance R 6, resistance R 7, resistance R 8, capacitor C 2 and operational amplifier IC2B form, operational amplifier IC2B is provided with three pins, the 6th pin, between the 7th pin and connecting resistance R6 and capacitor C 2, the end of while the 6th pin connecting resistance R5, another termination of resistance R 5 just, negative half-wave drives another output of shaping circuit, connect again behind operational amplifier IC2B the 5th pin connecting resistance R8+power supply of 6V, the end of the 7th pin connecting resistance R7 of operational amplifier IC2B, the half-wave filtering signal is born in the other end output of resistance R 7, and signal is sent another input of comparison integrating circuit.
4. inverter output automatic-balancing controller according to claim 1 is characterized in that: described relatively integrating circuit is made of resistance R 9, resistance R 10, resistance R 11, capacitor C 3, capacitor C 4 and operational amplifier IC2C; Operational amplifier IC2C is provided with three pins, between its 8th pin, the 9th pin and connecting resistance R10 and capacitor C 3, the 9th pin connects the positive half wave filtering signal of filter circuit simultaneously, resistance R 9 and capacitor C 4 also connect the 10th pin that back one is terminated at operational amplifier IC2C, the other end is connected to+power supply of 6V, the end of the 8th pin connecting resistance R11 of operational amplifier IC2C, the other end of resistance R 11 are made as conditioning signal output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203170422U CN201590774U (en) | 2009-12-10 | 2009-12-10 | Autobalance control device for output of inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203170422U CN201590774U (en) | 2009-12-10 | 2009-12-10 | Autobalance control device for output of inverter |
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| Publication Number | Publication Date |
|---|---|
| CN201590774U true CN201590774U (en) | 2010-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203170422U Expired - Lifetime CN201590774U (en) | 2009-12-10 | 2009-12-10 | Autobalance control device for output of inverter |
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| Country | Link |
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| CN (1) | CN201590774U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500874A (en) * | 2011-11-10 | 2012-06-20 | 山东大学 | Intelligent magnetic biasing detection and processing device for inversion welding power supply |
| CN102928160A (en) * | 2012-11-21 | 2013-02-13 | 昆山北极光电子科技有限公司 | Method for measuring dynamic balance of machinery |
| CN113328727A (en) * | 2018-01-29 | 2021-08-31 | 三峡大学 | Broadband 90-degree phase shifting method |
-
2009
- 2009-12-10 CN CN2009203170422U patent/CN201590774U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500874A (en) * | 2011-11-10 | 2012-06-20 | 山东大学 | Intelligent magnetic biasing detection and processing device for inversion welding power supply |
| CN102500874B (en) * | 2011-11-10 | 2014-07-02 | 山东大学 | Intelligent magnetic biasing detection and processing device for inversion welding power supply |
| CN102928160A (en) * | 2012-11-21 | 2013-02-13 | 昆山北极光电子科技有限公司 | Method for measuring dynamic balance of machinery |
| CN113328727A (en) * | 2018-01-29 | 2021-08-31 | 三峡大学 | Broadband 90-degree phase shifting method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100922 |