CN117175505B - Energy storage power supply inverter driving protection circuit and method and energy storage power supply - Google Patents
Energy storage power supply inverter driving protection circuit and method and energy storage power supply Download PDFInfo
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Abstract
The application relates to an energy storage power supply inverter drive protection circuit, a method and an energy storage power supply, which belong to the technical field of energy storage power supplies, and the energy storage power supply inverter drive protection circuit comprises a reference signal generation unit, a boost driving signal is received, the boost driving signal is divided to obtain a divided pressure signal, and the divided pressure signal and a bias signal are overlapped to output a reference signal; the identification unit receives the original driving signal and the reference signal, compares the original driving signal with the reference signal and outputs an identification signal based on a comparison result; the controller stops outputting the original driving signal in response to the identification signal; when the boost driving signal is not lost, the boost driving signal is always larger than the original driving signal, the original driving signal is compared with the reference signal through the identification unit, whether the boost driving signal is lost or not can be known, and the identification signal value controller is output when the boost driving signal is lost, so that the controller stops outputting the original driving signal in time when the driving abnormality occurs.
Description
Technical Field
The invention relates to the technical field of energy storage power supplies, in particular to an energy storage power supply inverter driving protection circuit and method and an energy storage power supply.
Background
The inverter is one of core components in the energy storage power supply and is used for converting stored direct-current electric energy into electric energy suitable for families, industries and power networks, and electric energy conversion of different voltages and frequencies can be achieved, so that the output of the energy storage power supply can meet different application requirements.
The inverter generally includes a group of switching devices composed of a plurality of switching tubes, and the switching states of the switching devices are controlled by a switching control signal so that the inverter outputs desired electric power. In order to enable the switching control signal to stably drive the switching state of the switching device, a boost module is generally required to be arranged in the inverter to increase the voltage level of the switching control signal so that the switching control signal is in the saturated conducting voltage working range of the switching device, thereby meeting the requirement of stable driving of the switching device in the inverter; however, when the boost module is abnormal, the switching control signal for controlling one switching tube is lost, the current borne by the other switching tubes rises, so that the temperature of the switching tube is increased sharply, and serious consequences such as damage to the switching tube and even fire are caused.
Disclosure of Invention
In order to facilitate timely switching off the inverter when a driving signal is abnormal so as to improve safety, the application provides an energy storage power supply inverter driving protection circuit, an energy storage power supply inverter driving protection method and an energy storage power supply.
In a first aspect, the present application provides an energy storage power inverter driving protection circuit, which adopts the following technical scheme:
an energy storage power inverter drive protection circuit comprising:
a reference signal generating unit for receiving the boost driving signal, dividing the boost driving signal to obtain a divided signal, and outputting the reference signal after superimposing the divided signal and the bias signal; the boost driving signal is used for controlling the on-off of a switching device of the inverter;
the identification unit is electrically connected with the reference signal generation unit, receives the original driving signal and the reference signal, compares the original driving signal with the reference signal and outputs an identification signal based on a comparison result;
a controller electrically connected to the recognition unit, for stopping outputting the original driving signal in response to the recognition signal;
the original driving signal is output by the controller and used for controlling the on-off of a switching device in the inverter, and the original driving signal is input into the boosting unit to be boosted to obtain a boosted driving signal; the amplitude of the divided voltage signal is consistent with the amplitude of the original driving signal.
Through adopting above-mentioned technical scheme, boost drive signal control inverter's switching device utilizes reference signal generation unit, gather boost drive signal, and carry out the bleeder pressure to boost drive signal and obtain the bleeder pressure signal, overlap the bleeder pressure signal with the offset signal back with output reference signal, when boost drive signal does not lose, boost drive signal is greater than original drive signal all the time, so compare original drive signal and reference signal through identification unit, can learn boost drive signal and lose, and output identification signal value controller when losing, so that the controller in time stops outputting original drive signal when drive abnormality appears, the security has been improved.
Optionally, the reference signal generating unit includes a first resistor R1, a second resistor R2, and a bias signal source V1;
one end of the first resistor R1 is connected with the output end of the boosting unit, the other end of the first resistor R1 is connected with one end of the second resistor R2, the bias signal source V1 and the identification unit, and the other end of the second resistor R2 is grounded.
By adopting the technical scheme, the voltage division of the first resistor R1 and the second resistor R2 is utilized to divide the voltage-boosting driving signal into the original driving signal equal, and then the voltage-divided voltage-boosting driving signal is overlapped with the bias signal output by the bias signal source V1, so that the reference signal is obtained.
Optionally, the resistance of the first resistor R1 and the resistance of the second resistor R2 satisfy the relation: x1= (k-1) X2;
where X1 is the resistance of the first resistor R1, X2 is the resistance of the second resistor R2, and k is the boosting multiple of the boosting unit.
By adopting the technical scheme, the amplitude of the boost driving signal can be accurately divided to the resistance of the original driving signal by using the first resistor R1 and the second resistor R2 which meet the relation resistance.
Optionally, the identifying unit includes a first comparator N1; the first input end of the first comparator N1 receives the original driving signal, the second receiving end is connected with the reference signal generating unit to receive the reference signal, and the output end is connected with the controller.
By adopting the technical scheme, the original driving signal and the reference signal are conveniently compared by the first comparator N1, and the reference signal is obtained by processing the boost driving signal, so that the first comparator N1 compares the original driving signal with the reference signal obtained by processing the boost driving signal, and the identification signal is timely output when the boost driving signal is lost.
Optionally, the amplitude of the bias signal is greater than zero and less than the amplitude of the original drive signal.
By adopting the technical scheme, when the inverter is not driven or is in dead time, the original driving signal is not output, the boosting driving signal is not output, the amplitude of the reference signal is equal to the amplitude of the offset signal, and the offset signal is larger than zero, so that the first comparator N1 outputs a low level. When the boost driving signal is lost, the original driving signal still exists, the amplitude of the reference signal is still equal to the bias signal, the bias signal is smaller than the original driving signal, and the first comparator N1 outputs a high level to indicate that the driving is abnormal, so that the switching device is turned off in time.
Optionally, if the boost driving signal and the original driving signal are provided with multiple paths, a first isolation unit is arranged between the boost unit and the identification unit, and a second isolation unit is arranged between the boost unit and the reference signal generation unit;
the input end of the first isolation unit is connected with the input end of the boosting unit, and the output end of the first isolation unit is connected with the identification unit and is used for controlling unidirectional transmission of each original driving signal from the boosting unit to the identification unit;
the input end of the second isolation unit is connected with the output end of the boosting unit, and the output end of the second isolation unit is connected with the reference signal generation unit and used for controlling unidirectional transmission of each boosting driving signal from the boosting unit to the reference signal generation unit.
By adopting the technical scheme, if the boosting driving signal and the original driving signal are provided with multiple paths, the boosting driving signal and the original driving signal both have high level and low level, the original driving signal with the high level is prevented from flowing to the original driving signal with the low level by the first isolation unit, and the boosting driving signal with the high level is prevented from flowing to the boosting driving signal with the low level by the second isolation unit.
Optionally, the identification unit further comprises a third resistor R3 and a capacitor C;
one end of the third resistor R3 is connected with the power supply VCC, and the other end of the third resistor R3 is connected with the output end of the first comparator N1, the controller and one end of the capacitor C; the other end of the capacitor C is grounded.
By adopting the technical scheme, the voltage at the serial connection point between the third resistor R3 and the capacitor C is close to the power supply voltage by utilizing the serial connection of the third resistor R3 and the capacitor C, so that after the voltage at the serial connection point is overlapped by the output of the first comparator N1, the controller can be effectively driven to execute response operation.
In a second aspect, the present application provides a method for protecting the driving of an inverter of an energy storage power supply, which adopts the following technical scheme:
the energy storage power inverter driving protection method is applied to a controller based on the energy storage power inverter driving protection circuit, and comprises the following steps:
receiving an identification signal output by an identification unit;
and stopping outputting the original driving signal according to the identification signal.
By adopting the technical scheme, after the controller receives the identification signal, the controller stops outputting the original driving signal, and timely stops driving the switching device in the inverter, so that the switching device stops working, and the safety is improved.
Optionally, the method further comprises:
acquiring temperature detection information of a switching device in the inverter in response to not receiving the identification signal;
and adjusting the duty ratio of the corresponding original driving signal according to the temperature detection information.
By adopting the technical scheme, when the temperature detection information detects that the temperature of a certain switching device is higher, the working time of the switching device with overhigh temperature is reduced by adjusting the duty ratio corresponding to the original driving signal, so that the heating of the switching device is reduced.
In a third aspect, the present application provides an energy storage power supply, which adopts the following technical scheme:
an energy storage power supply comprises the inverter driving protection circuit of the energy storage power supply.
Drawings
Fig. 1 is a circuit diagram for driving an inverter in the related art.
Fig. 2 is a block diagram showing a drive protection circuit according to one embodiment of the present application.
Fig. 3 is a connection structure diagram of one embodiment of the present application for showing a driving protection circuit.
Fig. 4 is a connection structure diagram for showing a driving protection circuit according to another embodiment of the present application.
Reference numerals illustrate: 1. a reference signal generation unit; 2. an identification unit; 3. a controller; 4. a first isolation unit; 5. and a second isolation unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to fig. 1 to 3 and the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Firstly, the background of the application is further described with reference to fig. 1, in fig. 1, bat+ is an output voltage of an energy storage power supply, an inverter includes a transformer, a boost unit, a switching device and a rectifying output circuit, in fig. 1, T1 is the transformer, G11 and G21 are complementary signals given by a controller 3, and a driving signal for controlling on-off of the switching device is obtained after amplification by the boost unit U1, so as to drive the switching devices Q1 and Q2. The output voltage BAT+ of the battery is alternately applied to the 2-3 windings and the 2-1 windings of the primary winding of the transformer T1, and the battery voltage is rectified by the diodes D39 and D33 after being boosted by the transformer to form a BUS voltage BUS for supplying power to a load. Under the conditions of abnormal driving of the boost unit U1 and the like, after one of the driving signals is lost, one of the switching devices Q1 and Q2 is conducted and cannot alternately work, at the moment, the current flowing through the switching device conducted in the switching device Q1 or Q2 is multiplied due to inconvenient load of a later stage, so that the temperature of the switching device conducted in the switching device Q1 or Q2 is rapidly increased, after the temperature exceeds the junction temperature of the device, the device damage phenomenon is caused, and in the worst case, the PCB board fires.
It should be understood that if the driving signals are lost, both switching devices Q1 and Q2 cannot be operated, and the transformer T1 stops operating at this time, and cannot supply voltage to the load of the subsequent stage, and the inverter does not operate at this time, so that damage to the components is not caused. Only when one of the driving signals is lost, the current in one of the inverter switching devices is increased, and damage is caused.
Based on this, the embodiment of the application discloses an energy storage power inverter drive protection circuit. Referring to fig. 2 and 3, an energy storage power inverter driving protection circuit includes:
a reference signal generating unit 1 that receives the boost drive signal, divides the boost drive signal to obtain a divided signal, and superimposes the divided signal and the bias signal to output a reference signal;
the boost driving signal is used for controlling the on-off of a switching device in the inverter. In the present embodiment, two switching devices are provided as an example, and in other embodiments, other numbers of switching devices are also possible.
An identification unit 2 connected to the reference signal generation unit 1, receiving the original driving signal and the reference signal, comparing the original driving signal and the reference signal, and outputting an identification signal based on the comparison result;
the controller 3 is connected to the recognition unit 2 and stops outputting the original driving signal in response to the recognition signal.
The original driving signal is output by the controller 3 and used for controlling the on-off of a switching device in the inverter, the original driving signal is input into the boosting unit to be boosted to obtain a boosted driving signal, the switching device can be a transistor, and the boosted driving signal is input to the grid electrode of the transistor, namely the on-off of the transistor can be controlled; the amplitude of the divided signal is identical to the amplitude of the original driving signal.
It should be appreciated that the number of switching devices, the number of raw drive signals, and the number of boost drive signals are all equal. One path of original driving signal outputs one path of boosting driving signal after passing through the boosting unit, and if the original driving signal does not exist, the boosting driving signal is not output.
In the above embodiment, the boost driving signal is used to control the switching device of the inverter, the reference signal generating unit 1 is used to collect the boost driving signal, and divide the voltage of the boost driving signal to obtain the divided voltage signal, and the divided voltage signal is overlapped with the bias signal to output the reference signal.
Referring to fig. 3, as an embodiment of the recognition unit 2, the recognition unit 2 includes a first comparator N1; the first input terminal of the first comparator N1 receives the original driving signal, the second receiving terminal is connected to the reference signal generating unit 1 to receive the reference signal, and the output terminal is connected to the controller 3.
The first comparator N1 includes a forward input terminal and a reverse input terminal, compares an input signal of the forward input terminal with an input signal of the reverse input terminal, and outputs a high level if the amplitude of the input signal of the forward input terminal is higher than that of the input signal of the forward input terminal. Otherwise, the first comparator N1 outputs a low level. In this embodiment, the first receiving terminal of the first comparator N1 is a forward input terminal, and the second receiving terminal is a reverse input terminal.
In fig. 3, signals A1 and A2 represent two original driving signals.
In the above embodiment, the first comparator N1 is used to facilitate the comparison between the original driving signal and the reference signal, and since the reference signal is obtained by processing the boost driving signal, the first comparator N1 compares the original driving signal with the reference signal obtained by processing the boost driving signal, so as to output the identification signal in time when the boost driving signal is lost.
As a further embodiment of the identification unit 2, the identification unit 2 further comprises a third resistor R3 and a capacitor C;
one end of the third resistor R3 is connected with the power supply VCC, and the other end is connected with the output end of the first comparator N1, the controller 3 and one end of the capacitor C; the other end of the capacitor C is grounded.
It should be understood that, for example, the magnitude of the identification signal output by the output terminal of the first comparator N1 is 5V, but the identification signal of 12V or 24V required by the controller 3 can be effectively driven, and then the third resistor R3 and the capacitor C are required to be utilized, specifically, the power supply VCC charges the capacitor C through the third resistor R3, and as the capacitor C charges, the voltage of the capacitor C gradually approaches the voltage of the power supply VCC, so that the voltage at the serial connection point of the third resistor R3 and the capacitor C approaches the voltage of the power supply VCC. At this time, the voltage of the power supply VCC is set according to the actual requirement, and the identification signal output by the first comparator N1 is superimposed with the voltage at the serial connection point of the third resistor R3 and the capacitor C, that is, effective driving of the controller 3 can be achieved.
In the above embodiment, the voltage at the series point between the third resistor R3 and the capacitor C is made to be close to the power supply voltage by using the series connection of the third resistor R3 and the capacitor C, so that the controller 3 can be effectively driven to perform the response operation after the output of the first comparator N1 overlaps the voltage at the series point.
Referring to fig. 4, as another embodiment of the recognition unit 2, the recognition unit 2 is further configured to compare the reference signal with a preset maximum threshold signal to output a recognition signal. Specifically, the identifying unit 2 includes a second comparator N2, a third comparator N3, a fourth resistor R4, and a threshold signal source V2, where a positive input terminal of the second comparator N2 is connected to an input terminal of the boost unit and is used to receive an original driving signal, a negative input terminal of the second comparator N2 is connected to the reference signal generating unit and a positive input terminal of the third comparator N3 to receive the reference signal, a negative input terminal of the second comparator N2 is connected to one end of the fourth resistor R4, another end of the fourth resistor R4 is connected to the threshold signal source V2, and the threshold signal source V2 is used to output a preset maximum threshold signal.
The preset maximum threshold signal is a working maximum voltage value of the boost driving signal output by the boost unit.
In the above embodiment, the second comparator N2 and the third comparator make up a window comparison, so that when the amplitude of the reference signal is between the original driving signal and the preset maximum threshold signal, the identification signal of low level is output; when the amplitude of the reference signal is smaller than that of the original driving signal, the output of the boosting unit is lost, and a high-level identification signal is output at the moment; when the amplitude of the reference signal is larger than the preset maximum threshold signal, the output abnormality of the boosting unit is larger than the set working maximum voltage value, and at the moment, a high-level identification signal is output. The second comparator N2 and the third comparator N3 can be used for timely identifying when the output of the boosting unit is lost or abnormal.
It should be understood that the two embodiments of the identifying unit 2 differ in that in the first embodiment, it is only possible to identify whether the boost driving signal is lost, i.e. the amplitude of the input signal at the positive input of the first comparator N1 is higher than the amplitude of the input signal at the positive input, the first comparator N1 outputs a high level, whereas the first comparator N1 outputs a low level. With the first embodiment, the high-level identification signal can be output only when the boost driving signal is lost, and cannot be fed back in time when the boost multiple of the boost unit is abnormal. Since the boosted driving signal after boosting is transmitted to the control unit, if the amplitude of the boosted driving signal is too high and the subsequent control unit is easily damaged, in the second embodiment, the second comparator N2 and the third comparator N3 are used to output the low-level identification signal when the reference voltage is greater than the original driving signal and less than the preset maximum threshold signal, which indicates that the boosted unit is in a normal working state at this time. When the reference voltage is smaller than the original driving signal or larger than the preset maximum threshold signal, the problem that the output of the boosting unit is lost or the output overvoltage exists is indicated, namely, in the second embodiment, the problem that the output is lost or the output overvoltage can be identified at the same time. Referring to fig. 3, as one embodiment of the bias signal, the magnitude of the bias signal is greater than zero and less than the magnitude of the original drive signal.
In the above embodiment, when the inverter is not driven or within the driving dead time, the original driving signal is not output, and the boost driving signal is not output, at this time, the amplitude of the reference signal is equal to the amplitude of the bias signal, and the bias signal is greater than zero, so that the first comparator N1 outputs a low level. When the boost driving signal is lost, the original driving signal still exists, the amplitude of the reference signal is still equal to the bias signal, the bias signal is smaller than the original driving signal, and the first comparator N1 outputs a high level to indicate that the driving is abnormal, so that the switching device is turned off in time.
Referring to fig. 3, as one embodiment of the reference signal generating unit 1, the reference signal generating unit 1 includes a first resistor R1, a second resistor R2, and a bias signal source V1;
one end of the first resistor R1 is connected to the output end of the boosting unit to receive the boosting driving signal, and the other end is connected to one end of the second resistor R2, the bias signal source V1, and the identification unit 2, and the other end of the second resistor R2 is grounded.
In fig. 3, signals B1 and B2 represent two boost driving signals. The boost driving signal B1 is obtained by the original driving signal A1 through the boost unit, and the boost driving signal B2 is obtained by the original driving signal A2 through the boost unit.
Specifically, when the identification unit 2 is the first comparator N1, the other end of the first resistor R1 is connected to the second input terminal of the first comparator N1.
In the above embodiment, the voltage division of the first resistor R1 and the second resistor R2 is used to divide the boost driving signal to be equal to the original driving signal, and then the divided boost driving signal is overlapped with the bias signal output by the bias signal source V1, so as to obtain the reference signal.
Specifically, the resistance value of the first resistor R1 and the resistance value of the second resistor R2 satisfy the relation: x1= (k-1) X2;
where X1 is the resistance of the first resistor R1, X2 is the resistance of the second resistor R2, and k is the boosting multiple of the boosting unit.
In the above embodiment, the amplitude of the boost driving signal can be accurately divided to the resistance of the original driving signal by using the first resistor R1 and the second resistor R2 satisfying the relational resistance.
As a further embodiment of the drive protection circuit, if the boost drive signal and the original drive signal are provided with multiple paths, a first isolation unit 4 is provided between the boost unit and the identification unit 2, and a second isolation unit 5 is provided between the boost unit and the reference signal generation unit 1;
the input end of the first isolation unit 4 is connected with the input end of the boosting unit, and the output end of the first isolation unit 4 is connected with the identification unit 2 and is used for controlling one-way transmission of each original driving signal from the boosting unit to the identification unit 2;
the input end of the second isolation unit 5 is connected with the output end of the boost unit, and the output end of the second isolation unit 5 is connected with the reference signal generating unit 1 and is used for controlling unidirectional transmission of each boost driving signal from the boost unit to the reference signal generating unit 1.
Specifically, the first isolation unit 4 includes a plurality of first diodes D1, and the number of the first diodes D1 is identical to the number of the original driving signals, and the second isolation unit 5 includes a plurality of second diodes D2, and the number of the second diodes D2 is identical to the number of the boost driving signals. The first diode D1 is connected in series between one of the input terminals of the boosting unit and the first receiving terminal of the identification unit 2, and the anode of the first diode D1 is connected to one of the input terminals of the boosting unit. Each path of original driving signal needs to be retransmitted to the identification unit 2 through the first diode D1. The second diode D2 is connected in series between the boosting unit and the reference signal generating unit 1, and an anode of the second diode D2 is connected to one of output terminals of the boosting unit.
In the above embodiment, if the boost driving signal and the original driving signal are provided with multiple paths, and both the boost driving signal and the original driving signal have a high level and a low level, the first isolation unit 4 prevents the high level original driving signal from flowing to the low level original driving signal, and the second isolation unit 5 prevents the high level boost driving signal from flowing to the low level boost driving signal.
The embodiment of the application discloses an energy storage power inverter driving protection method. The energy storage power inverter driving protection method comprises the steps of applying the energy storage power inverter driving protection circuit to the controller 3, wherein the method comprises the following steps of:
receiving the identification signal output by the identification unit 2;
and stopping outputting the original driving signal according to the identification signal.
In the above embodiment, after receiving the identification signal, the controller 3 stops outputting the original driving signal, and stops driving the switching device in the inverter in time, so that the switching device stops working, and the safety is improved.
As a further embodiment of the energy storage power inverter driving protection method, the energy storage power inverter driving protection method further includes:
acquiring temperature detection information of a switching device in the inverter in response to not receiving the identification signal;
and adjusting the duty ratio of the corresponding original driving signal according to the temperature detection information.
It should be understood that when the identification unit 2 does not output the identification signal, the influence of the following factors may also cause a situation in which the temperature of a certain switching device is high. For example, the effect of ambient temperature on the switching device temperature, switching devices operating in high temperature environments may be warmed by ambient heat conduction; the heat dissipation efficiency of the switching device also affects the temperature of the switching device, and if the switching device cannot effectively dissipate heat, heat can accumulate in the switching device to cause temperature rise; in addition, the temperature of the switching device is also affected by the packaging of the circuit, the heat dissipation of surrounding components, and the like.
It will also be appreciated that when the identification unit 2 outputs the identification signal, it directly stops outputting all the original drive signals so that the switching device is not operated, which is to prevent an early response by the temperature of the switching device not reaching the threshold temperature, but since the temperature of the switching device is also affected by the above factors, in order to further detect a situation in which the temperature of the switching device is too high, it is necessary to adjust the duty ratio of the original drive signals at this time.
Specifically, taking two paths of original switching signals as examples, in an initial state, the duty ratio of the two paths of original switching signals is 0.5, and the phases are always opposite. The two paths of switching signals are respectively used for controlling the on-off of the two switching devices, the temperature detection information of the two switching devices is T1 and T2, and the duty ratio is D1 and D2. D1=d2=0.5 when both T1 and T2 are within the preset range, wherein the preset range is the preferred operating temperature of the switching device, which can be set according to the chip manual of the switching device; when either one of T1 and T2 is higher than the maximum operating temperature of the switching device, d1=d2=0, i.e., when the controller 3 stops outputting the original driving signal; otherwise, calculating the temperature difference between T1 and T2, and obtaining the duty ratio D1 of the switching device with high temperature according to a preset mapping table and temperature detection information; the duty ratio d2= (1-D1) of the other switching device is obtained from the duty ratio D1 of the switching device whose temperature is high. The preset mapping table comprises a corresponding relation between a temperature difference value and a duty ratio, and the higher the temperature difference value of the temperature detection information is, the higher the temperature difference value is, the switching device with overhigh temperature is shown to exist, and at the moment, the lower the duty ratio of the switching device is. In the preset mapping table, the temperature difference and the duty ratio are in inverse relation, and the duty ratio is smaller than 0.5. By means of calculating the temperature difference, the problem of over-temperature of the switching device can be found in time, the duty ratio of an original driving signal of the corresponding switching device is reduced in time, control logic is simple, a large amount of calculation is not needed, and response speed is improved.
In the above embodiment, when the temperature detection information detects that the temperature of a certain switching device is high, the duty ratio corresponding to the original driving signal is adjusted to reduce the operating time of the switching device with an excessively high temperature, so as to reduce the heat generation of the switching device.
The embodiment of the application discloses an energy storage power supply, which comprises the energy storage power supply inverter driving protection circuit.
The energy storage power inverter driving protection method provided by the application can realize the energy storage power inverter driving protection circuit, and the specific working process of the energy storage power inverter driving protection method can refer to the corresponding process in the embodiment of the method.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
The foregoing description of the preferred embodiments of the present application is not intended to limit the scope of the application, in which any feature disclosed in this specification (including abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
Claims (7)
1. An energy storage power inverter drive protection circuit, comprising:
a reference signal generating unit (1) which receives a boost driving signal, divides the boost driving signal to obtain a divided signal, and outputs a reference signal by superposing the divided signal and a bias signal;
the reference signal generating unit (1) includes a first resistor R1, a second resistor R2, and a bias signal source V1; one end of the first resistor R1 is connected with the output end of the boosting unit, the other end of the first resistor R1 is connected with one end of the second resistor R2, the bias signal source V1 and the identification unit (2), and the other end of the second resistor R2 is grounded;
the resistance of the first resistor R1 and the resistance of the second resistor R2 satisfy the relation: x1= (k-1) X2; wherein X1 is a resistance value of the first resistor R1, X2 is a resistance value of the second resistor R2, and k is a boosting multiple of the boosting unit;
an identification unit (2) electrically connected to the reference signal generation unit (1) to receive an original driving signal and the reference signal, compare the original driving signal and the reference signal, and output an identification signal based on a comparison result;
a controller (3) electrically connected to the recognition unit (2) to stop outputting the original driving signal in response to the recognition signal;
the original driving signal is output by the controller (3), the original driving signal is input into the boosting unit to be boosted to obtain the boosting driving signal, the boosting driving signal is used for controlling the on-off of a switching device in the inverter, and the boosting driving signal is not output if the original driving signal does not exist; the amplitude of the voltage division signal is consistent with the amplitude of the original driving signal; the magnitude of the bias signal is greater than zero and less than the magnitude of the original drive signal.
2. The energy storage power inverter drive protection circuit of claim 1, wherein: the identification unit (2) comprises a first comparator N1; the first input end of the first comparator N1 receives an original driving signal, the second receiving end is connected with the reference signal generating unit (1) to receive a reference signal, and the output end is connected with the controller (3).
3. The power inverter driving protection circuit according to claim 1, wherein if the boost driving signal and the original driving signal are provided with multiple paths, the power inverter driving protection circuit is characterized in that:
a first isolation unit (4) is arranged between the boosting unit and the identification unit (2), and a second isolation unit (5) is arranged between the boosting unit and the reference signal generation unit (1);
the input end of the first isolation unit (4) is connected with the input end of the boosting unit, and the output end of the first isolation unit (4) is connected with the identification unit (2) and is used for controlling unidirectional transmission of each original driving signal from the boosting unit to the identification unit (2);
the input end of the second isolation unit (5) is connected with the output end of the boosting unit, and the output end of the second isolation unit (5) is connected with the reference signal generation unit (1) and is used for controlling unidirectional transmission of each boosting driving signal from the boosting unit to the reference signal generation unit (1).
4. The energy storage power inverter drive protection circuit of claim 2, wherein: the identification unit (2) further comprises a third resistor R3 and a capacitor C;
one end of the third resistor R3 is connected with a power supply VCC, and the other end is connected with the output end of the first comparator N1, the controller (3) and one end of the capacitor C; the other end of the capacitor C is grounded.
5. An energy storage power inverter driving protection method, based on an energy storage power inverter driving protection circuit as claimed in any one of claims 1-4, applied to a controller (3), characterized in that the method comprises:
receiving an identification signal output by the identification unit (2);
and stopping outputting the original driving signal according to the identification signal.
6. The method of claim 5, further comprising:
acquiring temperature detection information of a switching device in the inverter in response to not receiving the identification signal;
and adjusting the duty ratio of the corresponding original driving signal according to the temperature detection information.
7. An energy storage power supply, characterized in that: an energy storage power inverter drive protection circuit comprising any one of claims 1-4.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001042958A (en) * | 1999-07-20 | 2001-02-16 | Lg Electronics Inc | Inverter control signal generating device using pointer system |
| CN101277572A (en) * | 2007-03-29 | 2008-10-01 | 三星电子株式会社 | Backlight inverter, drive methodand liquid crystal display using the same |
| CN104038188A (en) * | 2013-03-08 | 2014-09-10 | 控制技术有限公司 | Apparatus For Preventing Output Of Input Signal, Apparatus Providing Output Voltage To Driving Motor And Motor Driving System |
| CN110165922A (en) * | 2019-06-11 | 2019-08-23 | 西安科技大学 | Multiple-channel output random waveform power signal source |
| CN216929576U (en) * | 2022-02-28 | 2022-07-08 | 北京汇能精电科技股份有限公司 | Protection circuit based on boost power tube in inverter and inverter |
| WO2023026757A1 (en) * | 2021-08-27 | 2023-03-02 | パナソニックＩｐマネジメント株式会社 | Voltage boosting circuit and sensor device |
| CN116800090A (en) * | 2023-08-21 | 2023-09-22 | 深圳市力生美半导体股份有限公司 | Driving circuit of switching power supply and switching power supply |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8982498B2 (en) * | 2013-06-14 | 2015-03-17 | Rohm Co., Ltd. | Switching regulator, motor drive device, magnetic disk storage device, and electronic apparatus |
-
2023
- 2023-11-03 CN CN202311456025.8A patent/CN117175505B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001042958A (en) * | 1999-07-20 | 2001-02-16 | Lg Electronics Inc | Inverter control signal generating device using pointer system |
| CN101277572A (en) * | 2007-03-29 | 2008-10-01 | 三星电子株式会社 | Backlight inverter, drive methodand liquid crystal display using the same |
| CN104038188A (en) * | 2013-03-08 | 2014-09-10 | 控制技术有限公司 | Apparatus For Preventing Output Of Input Signal, Apparatus Providing Output Voltage To Driving Motor And Motor Driving System |
| CN110165922A (en) * | 2019-06-11 | 2019-08-23 | 西安科技大学 | Multiple-channel output random waveform power signal source |
| WO2023026757A1 (en) * | 2021-08-27 | 2023-03-02 | パナソニックＩｐマネジメント株式会社 | Voltage boosting circuit and sensor device |
| CN216929576U (en) * | 2022-02-28 | 2022-07-08 | 北京汇能精电科技股份有限公司 | Protection circuit based on boost power tube in inverter and inverter |
| CN116800090A (en) * | 2023-08-21 | 2023-09-22 | 深圳市力生美半导体股份有限公司 | Driving circuit of switching power supply and switching power supply |
Non-Patent Citations (1)
| Title |
|---|
| 应用于储能系统的CLLLC谐振变换器控制策略研究;颜湘武等;《华北电力大学学报》;第1-13页 * |
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