CN210183242U - Bidirectional inverter - Google Patents
Bidirectional inverter Download PDFInfo
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- CN210183242U CN210183242U CN201921163085.XU CN201921163085U CN210183242U CN 210183242 U CN210183242 U CN 210183242U CN 201921163085 U CN201921163085 U CN 201921163085U CN 210183242 U CN210183242 U CN 210183242U
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- 238000002955 isolation Methods 0.000 claims abstract description 34
- 239000003990 capacitor Substances 0.000 claims abstract description 8
- 230000001360 synchronised effect Effects 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
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- 230000008569 process Effects 0.000 description 6
- 230000004907 flux Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
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- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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Abstract
A bidirectional inverter comprises a battery pack, a booster circuit, an isolation converter, a controller, an inverter circuit, a load end and a commercial power end; the high-voltage side of the isolation converter is connected with the input end of the bridge rectifier through a first change-over switch, the output end of the bridge rectifier is connected with the input end of the inverter circuit, and the output end of the inverter circuit is connected with the load end through a second change-over switch; the load end is connected with the commercial power end through the change-over switch, the commercial power end is connected with the input end of the inverter circuit through the bridge rectifier, and the output end of the inverter circuit is connected with the high-voltage side of the isolation converter through the first change-over switch. The inverter circuit is controlled by the controller to realize two different working modes, so that the inverter circuit can realize inverter discharge and reversely charge the battery pack, and the booster circuit, the isolation converter, the inverter circuit and the filter capacitor and the resonant network of the primary level and the secondary level are shared in the two modes, so that the size of the transformer is reduced, and the production cost of the converter is reduced.
Description
Technical Field
The present application relates to power conversion devices, and more particularly to such a cost-effective bidirectional inverter.
Background
The existing power supply adopts two sets of converters to realize bidirectional inversion in the bidirectional inversion process, so that the product is large in size, high in cost and low in efficiency.
Disclosure of Invention
The application provides a bidirectional inverter to reduce the size of a converter and reduce the cost.
According to a first aspect, an embodiment provides a bidirectional inverter, including a battery pack, a boost circuit, an isolation converter, a controller, an inverter circuit, a load terminal, and a utility terminal; the booster circuit comprises a first switch tube and a second switch tube, two groups of electromagnetic coils are arranged on the low-voltage side of the isolation converter, the two groups of electromagnetic coils are respectively connected with the positive pole and the negative pole of the battery pack after being connected with the first switch tube and the second switch tube in series, and the control poles of the first switch tube and the second switch tube are connected with the controller; the output end of the first bridge rectifier is connected with the input end of the inverter circuit; the load end is also connected with a mains supply end through a second change-over switch, the mains supply end is connected with the input end of the inverter circuit through a second bridge rectifier, and the output end of the inverter circuit is also connected with the high-voltage side of the isolation converter through a first change-over switch; the inverter circuit is a group of H-bridge circuits and comprises a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube, wherein the third switching tube and the sixth switching tube are diagonally opposite in an H-bridge, the fourth switching tube and the fifth switching tube are diagonally opposite in the H-bridge, and a control electrode of the switching tube in the H-bridge circuit is connected with the controller; when the battery pack discharges to a load, the controller drives the switch tube in the inverter circuit to enable the inverter circuit to realize conversion from direct current to alternating current, meanwhile, the controller controls the first switch tube and the second switch tube to be conducted alternately, the duty ratios of control signals of the first switch tube and the second switch tube are the same, the phases are opposite, a boost circuit is formed through the isolation converter in a push-pull mode, the first switch is controlled to conduct the high-voltage side of the isolation converter with the input end of the first bridge rectifier, and the second switch is controlled to conduct the output end of the inverter circuit with the load end; when the battery pack discharges to the load, the controller drives the third, fourth, fifth and sixth switching tubes of the H bridge by adopting SPWM (sinusoidal pulse width modulation), and the output voltage of the third, fourth, fifth and sixth switching tubes is a stable sine wave controlled by a closed loop after being filtered by the second inductor; when the commercial power charges the battery pack, the controller drives the H-bridge circuit in a full-bridge PWM or PS-FB mode, the controller controls the first change-over switch to conduct the output end of the H-bridge circuit with the high-voltage side of the isolation converter, the first switch tube and the second switch tube achieve energy charging for the battery pack after synchronous rectification under the condition that synchronous signals given by the controller are conducted alternately, and the controller controls the second change-over switch to conduct the commercial power end with the load end, namely commercial power bypass output is achieved in the charging state.
Preferably, the system further comprises a non-polar capacitor and an inductor of the resonant network for the resonant function, wherein the non-polar capacitor and the inductor are connected in series with the electromagnetic coil on the high-voltage side of the isolation converter.
Preferably, the energy transferred in both directions is borne by the same isolating converter in different states of discharging and charging.
Preferably, the H-bridge circuit is driven by SPWM and full-bridge PWM or phase-shift PS-FB modes in discharging and charging states respectively.
Preferably, the boost circuit and the transformer and the battery pack are driven by the controller in a push-pull configuration or a full-bridge configuration to transfer energy from the low-voltage side to the high-voltage side through the isolated converter.
Preferably, the switching tube in the H-bridge circuit is a MOSFET or an IGBT.
Preferably, the battery pack is in an inverter mode when discharging to a load, the controller drives the H-bridge circuit by SPWM, and the controller drives the H-bridge circuit by full-bridge PWM or phase-shifted PS-FB mode when the commercial power charges the battery pack.
Preferably, the secondary end of the high-voltage side of the isolation converter is provided with at least one tap, the tap is connected with the fixed end of the first change-over switch through a switch, and the high-voltage side of the isolation converter can realize voltage transformation ratio balance of the two sides of the isolation converter through tap switching.
Preferably, a PFC circuit or a BOOST circuit may be disposed between the utility power terminal and the input terminal of the H-bridge, so as to increase the input voltage of the H-bridge circuit during charging.
According to the bidirectional inverter of the embodiment, the inverter circuit is controlled by the controller to realize two different working modes, so that not only can inversion discharge be realized, but also the battery pack can be reversely charged, and the booster circuit, the isolation converter, the inverter circuit and the controller are shared, so that the size of the converter is greatly reduced, and the production cost of the converter is greatly reduced.
Drawings
FIG. 1 is a circuit diagram according to an embodiment of the present application;
fig. 2 and 3 are partially enlarged views of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
For convenience of description, the bidirectional inverter of the present application is referred to as an inverter state in the process of transferring energy from the battery pack to the load; the bi-directional inverter of the present application is referred to as a state of charge during the transfer of energy from the mains to the battery pack. Referring to fig. 1-3, a bidirectional inverter includes a battery pack 1, an isolation converter 2, a controller 3, an inverter circuit 4, a load terminal 5, a utility power terminal 6, and a voltage boosting circuit composed of a first switch tube Q1 and a second switch tube Q2; the battery pack stores electric energy transmitted by commercial power in a charging state and provides electric energy for a load in an inversion state. The controller is the core of the whole bidirectional inverter working state logic control and the driving and control of the first switch tube Q1 and the second switch tube Q2. The isolation converter is provided with a low-voltage side and a high-voltage side of the low-voltage side, is used for isolation and energy transmission, and is used as a boosting isolation converter in an inversion state; and in a charging state, the circuit is used as a buck isolation converter. In the embodiment, the first switch tube Q1 and the second switch tube Q2 are NMOS tubes, the gate of the first switch tube Q1 is connected with the controller 3, the source of the first switch tube Q1 is connected with the negative electrode of the battery pack 1, and the drain of the first switch tube Q1 is connected with the electromagnetic coil on the low-voltage side of the isolated converter; the gate of the second switching tube Q2 is connected to the controller 3, the source of the second switching tube Q2 is connected to the negative pole of the battery pack, and the drain of the second switching tube Q2 is connected to the electromagnetic coil on the low-voltage side of the isolation converter. In other embodiments, the first switch tube and the second switch tube may also adopt a triode.
The high-voltage side of the isolation converter 2 is connected with the input end of a first bridge rectifier 7 through a first change-over switch A, the output end of the first bridge rectifier 7 is connected with the input end of an inverter circuit 4, and the output end of the inverter circuit 4 is connected with a load end 5 through a second change-over switch B; the load end 5 is further connected with a commercial power end 6 through a second switching change-over switch B, the commercial power end 6 is connected with the input end of the inverter circuit 4 through a second bridge rectifier 8, and the output end of the inverter circuit 4 is further connected with the high-voltage side of the isolation converter 2 through a first switching switch A. The first switch and the second switch may be relays controlled by a controller to switch the contacts, and in other embodiments, the first switch and the second switch may also be power semiconductor switches controlled by the controller.
The inverter circuit 4 is a group of H-bridge circuits, and includes a third switching tube Q3, a fourth switching tube Q4, a fifth switching tube Q5, and a sixth switching tube Q6, wherein the third switching tube Q3 and the sixth switching tube Q6 are diagonally opposite in the H-bridge, and the fourth switching tube Q4 and the fifth switching tube Q5 are diagonally opposite in the H-bridge.
In an inversion state, that is, when the battery pack discharges to a load, the controller 3 drives the H-bridge circuit in an SPWM mode, and outputs a stable sine wave whose output voltage is controlled by a closed loop after being filtered by the second inductor L2, so as to realize conversion from direct current to alternating current. In the process of driving the H-bridge circuit, the controller 3 controls the first switch tube Q1 and the second switch tube Q2 to be alternately conducted, the duty ratios of control signals of the first switch tube and the second switch tube are the same, the phases of the control signals are opposite, a boost circuit is formed through the isolation converter in a push-pull mode, the first switch tube Q1 and the second switch tube Q2 are matched with the electromagnetic coil to boost direct current of the battery pack and convert the direct current into alternating current, and the alternating current is output energy through the isolation converter 2. When the first switch tube Q1 and the second switch tube Q2 are alternately conducted, a dead time is set between the control signals of the alternate conduction to avoid the two switch tubes from being conducted simultaneously due to the delay of the switch tubes. The dead time is a protection period set for preventing the upper and lower tubes of the H-bridge or half H-bridge from being simultaneously conducted due to the problem of switching speed when the control signal is output. The controller controls the first change-over switch to conduct the high-voltage side of the isolation converter with the input end of the first bridge rectifier, and controls the second change-over switch to conduct the output end of the inverter circuit with the load end.
When the battery pack is charged by the mains supply, the controller 3 drives the H-bridge circuit in a full-bridge PWM mode or a phase-shifted full-bridge PS-FB mode. The specific control mode is as follows: the control levels of the second switch tube Q2, the third switch tube Q3 and the sixth switch tube Q6 are synchronous, and the control levels of the first switch tube Q1, the fourth switch tube Q4 and the fifth switch tube Q5 are synchronous. And the controller controls the first change-over switch to conduct the output end of the H-bridge circuit with the high-voltage side of the isolation converter, the first switch tube and the second switch tube realize synchronous rectification and then provide energy for the battery pack to charge under the condition that synchronous signals given by the controller are conducted alternately, and the controller controls the second change-over switch to conduct the commercial power end with the load end, namely commercial power bypass output is achieved under the charging state. When the charging state is realized, a power switch tube in the booster circuit is synchronous with a control signal of the H-bridge circuit in a PWM mode or a PS-FB mode, and a high-efficiency synchronous rectification function is realized. The boost circuit can also realize full-wave rectification and bridge rectification through a switching power device in the boost circuit in a charging state, such as a parasitic diode of a MOSFET (metal-oxide-semiconductor field effect transistor) or JBT (junction bipolar transistor) device, so as to meet the energy requirement for realizing charging of the battery pack.
In a preferred embodiment, the inverter further comprises a non-polar capacitor C1 and an inductor L1, wherein the non-polar capacitor C1 and the inductor L1 are connected in series with the electromagnetic coil on the high-voltage side of the isolated converter. A nonpolar capacitor C1 and an inductor L1 are connected in series on an electromagnetic coil on the high-voltage side of the transformer and used for generating a resonance function with leakage inductance of the transformer, so that the bidirectional inverter is enabled to work in a resonance soft switching mode in inversion and charging modes, the efficiency of the energy transfer process of the bidirectional inverter is improved to a higher degree, current and voltage spikes of a switching tube are reduced to a great extent, and electromagnetic compatibility (EMC) of the bidirectional inverter is facilitated. Meanwhile, the inversion boosting mode and the reverse charging mode work in an LLC (logical link control) or PS-FB mode, and the combination of a zero-voltage ZVS (zero voltage switching) switch and a zero-current ZCS (zero current switching) switch is effectively realized, so that the problems of switching loss of a power device and interference of electromagnetic compatibility are solved, and the effects of substantial high efficiency and low cost are achieved.
In a preferred embodiment, the third switching tube Q3, the fourth switching tube Q4, the fifth switching tube Q5 and the sixth switching tube Q6 are IGBTs or MOSFETs.
In a preferred embodiment, the high-voltage side of the isolating transformer 2 is provided with at least one tap, which is connected to the fixed end of the first switch a via a switch S. The tap is used for compensating the voltage difference in the energy transfer process caused by the duty ratio and the dead zone factor during the bidirectional conversion in a switching mode. Meanwhile, the input voltage range of the inverter bridge working in the PWM or PS-FB mode in the charging mode can be expanded, and the voltage transformation ratio balance of the two isolated converters is realized so as to adapt to the charging in a wider commercial power input range.
In a preferred embodiment, a PFC circuit or a BOOST circuit is disposed between the utility power terminal and the input terminal of the H-bridge, so as to increase the input voltage of the H-bridge circuit during charging. Under the condition, a PFC circuit or a BOOST booster circuit is adopted to replace a transformer tap to balance the voltage proportion at two sides of the converter, so that the battery pack matching use of different voltages is met, and the high-efficiency bidirectional conversion condition is achieved.
The working principle of the present application is explained below:
when the battery pack is in a discharging state, the controller controls the contact 7 and the contact 6 in the first change-over switch A to be communicated, the contact 4 and the contact 5 to be conducted, and simultaneously controls the contact 4 and the contact 3 of the second change-over switch B to be conducted, and the contact 7 and the contact 8 to be conducted. Meanwhile, the controller controls the first switch tube Q1 and the second switch tube Q2 to be alternately conducted, namely in a t1 time period, the controller gives a high level to a grid electrode of the first switch tube Q1, the first switch tube Q1 is conducted, and gives a low level to a grid electrode of the second switch tube Q2, the battery pack discharges to a low-voltage side electromagnetic coil of the isolated converter through the first switch tube Q1, magnetic flux of the electromagnetic coil changes, the high-voltage side of the isolated converter induces magnetic flux change, and current is generated by the battery pack; in a t2 time period, the controller gives a high grid level to the second switching tube Q2, the second switching tube Q2 is conducted, and gives a low grid level to the first switching tube Q1, the battery pack discharges electricity to the low-voltage side electromagnetic coil of the isolated converter through the second switching tube Q2, the magnetic flux of the electromagnetic coil changes, the high-voltage side of the isolated converter induces the magnetic flux change, and the high-voltage side generates a current with a direction opposite to that in the t1 time period, namely the first switching tube Q1 and the second switching tube Q2 are conducted alternately so that the high-voltage side of the isolated converter outputs low-voltage alternating current; the low-voltage alternating current is rectified by the first bridge rectifier 7 to output high-voltage direct current, and then is inverted by the inverter circuit 4 to output high-voltage alternating current to a load. t1 and t2 are adjacent control periods, and the interval lengths are the same.
When the battery pack is in a charging state, the controller controls the contact 7 and the contact 8 in the first change-over switch A to be communicated, the contact 4 and the contact 3 to be conducted, and simultaneously controls the contact 4 and the contact 5 of the second change-over switch B to be communicated, and the contact 7 and the contact 6 to be conducted. The mains supply can supply power to the load and can also charge the battery pack. Commercial power is rectified into direct current after passing through the second bridge rectifier 8 and then output to the input end of the inverter circuit 4, the controller controls the first switch tube Q1, the second switch tube Q2 and the switch tubes in the inverter circuit 4, so that the control levels of the control electrodes of the second switch tube Q2, the third switch tube Q3 and the sixth switch tube Q6 are synchronous, the control levels of the first switch tube Q1, the fourth switch tube Q4 and the fifth switch tube Q5 are synchronous, and the first switch tube Q1 and the second switch tube Q2 are alternately conducted by synchronous signals given by the controller.
That is, in the period T1, the controller controls the high level of the second switch tube Q2, the third switch tube Q3 and the sixth switch tube Q6, the controller controls the low level of the first switch tube Q1, the fourth switch tube Q4 and the fifth switch tube Q5, the positive pole of the direct current input by the second bridge rectifier 8 passes through the third switch tube Q3 to the contact 3 of the first switch, the negative pole of the direct current passes through the sixth switch tube Q6 and then through the inductor L2 to the contact 8 of the first switch, because in the charging state of the battery pack, the controller controls the contact 7 and the contact 8 in the first switch a to be connected, the contact 4 and the contact 3 are connected, so the direct current passes through the first switch a to reach the high voltage side of the isolated converter, the magnet on the high voltage side of the isolated converter is changed, the low voltage side of the isolated converter induces the magnet to generate current, at this time, because the high level of the second switch tube Q2 is connected, the second switching tube Q2 cooperates with the low-voltage side electromagnetic coil for rectification and then charges the battery pack.
In a time period of T2, the controller controls an extremely low level for the second switching tube Q2, the third switching tube Q3 and the sixth switching tube Q6, the controller controls an extremely high level for the first switching tube Q1, the fourth switching tube Q4 and the fifth switching tube Q5, the positive pole of the direct current input by the second bridge rectifier 8 passes through the third switching tube Q4 and then through the inductor L2 to the contact 8 of the first switch, the negative pole of the direct current passes through the fifth switching tube Q5 to the contact 3 of the first switch, the direct current passes through the first switch a to reach the high-voltage side of the isolating converter, the magnet on the high-voltage side of the isolating converter generates a change, the low-voltage side of the isolating converter induces a current to the magnet, at this time, because the high level of the first switching tube Q1 is conducted, the first switching tube Q1 cooperates with the electromagnetic coil on the low-voltage side to rectify, and then charges the battery pack.
During the time periods T1 and T2, the direction of the direct current transmitted to the high-voltage side of the isolated converter is opposite, so that the current generated when the battery pack is charged at the low-voltage side of the isolated converter is also opposite, and the direction of the current generated in the two groups of electromagnetic coils at the low-voltage side just coincides with the charging direction of the battery pack. T1 and T2 are adjacent one control period, and the interval lengths are the same.
It can be seen from the above working process that the inverter circuit is driven by the controller to realize two different working state modes, and the driving of the controller under different modes under the synchronous control of the first switch can realize inversion and reverse charging of the battery pack. The controller, the isolation converter, the inverter circuit and the booster circuit are shared in two working states, so that the size of the bidirectional inverter is greatly reduced, and the material cost of the bidirectional inverter is greatly reduced.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (8)
1. A bidirectional inverter is characterized by comprising a battery pack, a booster circuit, an isolation converter, a controller, an inverter circuit, a load end and a commercial power end; the booster circuit comprises a first switch tube and a second switch tube, two groups of electromagnetic coils are arranged on the low-voltage side of the isolation converter, the two groups of electromagnetic coils are respectively connected with the positive pole and the negative pole of the battery pack after being connected with the first switch tube and the second switch tube in series, and the control poles of the first switch tube and the second switch tube are connected with the controller; the output end of the first bridge rectifier is connected with the input end of the inverter circuit; the load end is also connected with a mains supply end through a second change-over switch, the mains supply end is connected with the input end of the inverter circuit through a second bridge rectifier, and the output end of the inverter circuit is also connected with the high-voltage side of the isolation converter through a first change-over switch; the inverter circuit is a group of H-bridge circuits and comprises a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube, wherein the third switching tube and the sixth switching tube are diagonally opposite in an H-bridge, the fourth switching tube and the fifth switching tube are diagonally opposite in the H-bridge, and a control electrode of the switching tube in the H-bridge circuit is connected with the controller; when the battery pack discharges to a load, the controller drives the switch tube in the inverter circuit to enable the inverter circuit to realize conversion from direct current to alternating current, meanwhile, the controller controls the first switch tube and the second switch tube to be conducted alternately, the duty ratios of control signals of the first switch tube and the second switch tube are the same, the phases are opposite, a boost circuit is formed through the isolation converter in a push-pull mode, the first switch is controlled to conduct the high-voltage side of the isolation converter with the input end of the first bridge rectifier, and the second switch is controlled to conduct the output end of the inverter circuit with the load end; when the battery pack discharges to the load, the controller drives the third, fourth, fifth and sixth switching tubes of the H bridge by adopting SPWM (sinusoidal pulse width modulation), and the output voltage of the third, fourth, fifth and sixth switching tubes is a stable sine wave controlled by a closed loop after being filtered by the second inductor; when the commercial power charges the battery pack, the controller drives the H-bridge circuit in a full-bridge PWM or PS-FB mode, the controller controls the first change-over switch to conduct the output end of the H-bridge circuit with the high-voltage side of the isolation converter, the first switch tube and the second switch tube achieve energy charging for the battery pack after synchronous rectification under the condition that synchronous signals given by the controller are conducted alternately, and the controller controls the second change-over switch to conduct the commercial power end with the load end, namely commercial power bypass output is achieved in the charging state.
2. The bi-directional inverter of claim 1, further comprising a resonant network nonpolar capacitor and inductor for resonant function, the nonpolar capacitor and inductor being connected in series with the electromagnetic coil on the high side of the isolated converter.
3. The bi-directional inverter of claim 1, wherein bi-directional energy transfer is undertaken by the same isolated converter during different states of discharge and charge.
4. The bi-directional inverter of claim 1, wherein the boost circuit transfers energy from the low voltage side to the high voltage side through the isolated converter under drive of the controller in a push-pull configuration or a full-bridge configuration with the transformer and the battery pack.
5. The bi-directional inverter of claim 1, wherein the switching tubes in the H-bridge circuit are MOSFETs or IGBTs.
6. The bi-directional inverter of claim 1, wherein the battery pack is in an inverter mode when discharging to the load, the controller drives the H-bridge circuit in SPWM, and the controller drives the H-bridge circuit in full-bridge PWM or phase-shifted PS-FB mode when the battery pack is charging from the utility power.
7. The bi-directional inverter of claim 1, wherein the secondary side of the high side of the isolated converter is provided with at least one tap, the tap is connected to the fixed end of the first switch through a switch, and the high side of the isolated converter is switched through the tap to achieve voltage ratio balance of the two sides of the isolated converter.
8. The bidirectional inverter of claim 1, wherein a PFC circuit or a BOOST circuit is provided between a commercial power terminal and an input terminal of the H-bridge circuit to increase an input voltage of the H-bridge circuit when charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921163085.XU CN210183242U (en) | 2019-07-23 | 2019-07-23 | Bidirectional inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921163085.XU CN210183242U (en) | 2019-07-23 | 2019-07-23 | Bidirectional inverter |
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| Publication Number | Publication Date |
|---|---|
| CN210183242U true CN210183242U (en) | 2020-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921163085.XU Withdrawn - After Issue CN210183242U (en) | 2019-07-23 | 2019-07-23 | Bidirectional inverter |
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| CN (1) | CN210183242U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336483A (en) * | 2019-07-23 | 2019-10-15 | 深圳市三瑞电源有限公司 | A kind of two-way inverter |
| CN113783251A (en) * | 2021-08-26 | 2021-12-10 | 四川科陆新能电气有限公司 | Virtual internal resistance adjusting circuit for balancing between battery clusters |
-
2019
- 2019-07-23 CN CN201921163085.XU patent/CN210183242U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336483A (en) * | 2019-07-23 | 2019-10-15 | 深圳市三瑞电源有限公司 | A kind of two-way inverter |
| CN110336483B (en) * | 2019-07-23 | 2024-04-19 | 深圳市三瑞电源有限公司 | Bidirectional inverter |
| CN113783251A (en) * | 2021-08-26 | 2021-12-10 | 四川科陆新能电气有限公司 | Virtual internal resistance adjusting circuit for balancing between battery clusters |
| CN113783251B (en) * | 2021-08-26 | 2024-04-16 | 四川科陆新能电气有限公司 | Virtual internal resistance regulating circuit for balancing among battery clusters |
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