CN213637486U - Converter and power supply system - Google Patents
Converter and power supply system Download PDFInfo
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- CN213637486U CN213637486U CN202022841811.8U CN202022841811U CN213637486U CN 213637486 U CN213637486 U CN 213637486U CN 202022841811 U CN202022841811 U CN 202022841811U CN 213637486 U CN213637486 U CN 213637486U
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Abstract
The present application relates to a converter and a power supply system, wherein the converter comprises: the conversion circuit is used for converting the electric energy output by the power supply and outputting the converted electric energy; a temperature acquisition device for acquiring the temperature of the sensitive element in the conversion circuit; and when the temperature of the sensitive element is greater than the first threshold value, the input voltage of the conversion circuit is increased, and the input current of the conversion circuit is reduced. The conversion circuit is connected with a power supply, and the control chip is connected with the temperature acquisition device and the conversion circuit. In the converter, because the heating magnitude of the sensitive element is positively correlated with the current magnitude passing through the sensitive element, the control chip reduces the input current of the conversion circuit and increases the input voltage of the conversion circuit, thereby reducing the fluctuation of the input power of the conversion circuit while carrying out over-temperature protection and being beneficial to maintaining the stability of the output power and the output electric quantity of the converter.
Description
Technical Field
The present application relates to the field of converter over-temperature protection, and in particular, to a converter and a power supply system.
Background
A converter refers to a device that converts one signal into another signal. The converter includes a dc-dc converter, an ac-dc converter, and an inverter according to the characteristic division of the electrical signal before and after conversion.
In the conventional converter, the temperature detection device is arranged to detect the temperature of the converter, and when the temperature detected by the temperature detection device is higher than a preset threshold value, the input power is reduced to reduce the heat productivity of devices in the converter, so as to prevent the temperature from being too high. However, reducing the input power will also reduce the output power of the converter, resulting in a reduction in system performance. Therefore, the conventional converter with the over-temperature control function has the defects of large output power fluctuation and unstable output electric quantity.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a converter and a power supply system to achieve the effect of influencing the output power of the converter as little as possible while performing over-temperature protection, in order to solve the problems of large output power fluctuation and unstable output power when the conventional converter performs over-temperature control.
In a first aspect of the present application, there is provided a converter comprising:
the conversion circuit is used for converting the electric energy output by the power supply and outputting the converted electric energy;
a temperature acquisition device for acquiring the temperature of the sensitive element in the conversion circuit; the heating magnitude of the sensing element is positively correlated with the current magnitude passing through the sensing element;
when the temperature of the sensitive element is larger than a first threshold value, the input voltage of the conversion circuit is increased, and the input current of the conversion circuit is reduced;
the conversion circuit is connected with the power supply, and the control chip is connected with the temperature acquisition device and the conversion circuit.
In one embodiment, the temperature acquisition device is a temperature sensing bulb.
In one embodiment, the sensitive element is an IGBT, and the temperature acquisition device is disposed on a substrate of the IGBT.
In one embodiment, the converter is a DC-DC (Direct current-Direct current) converter.
In one embodiment, the conversion circuit is a boost circuit.
In one embodiment, the Boost circuit is a Boost circuit (switched dc Boost circuit).
In one embodiment, the control chip is a DSP (Digital Signal processing) chip.
In one embodiment, the model of the DSP chip is TMS320F 28335.
In a second aspect of the present application, a power supply system is provided, which includes a power supply and the converter in the above embodiments.
In one embodiment, the power supply is photovoltaic.
In the converter, the control chip firstly obtains the temperature of a sensitive element in the conversion circuit through the temperature acquisition device, and when the temperature of the sensitive element is greater than a first threshold value, the input voltage of the conversion circuit is increased, and the input current of the conversion circuit is reduced. Because the heating magnitude of the sensitive element is positively correlated with the current magnitude passing through the sensitive element, the purposes of reducing heating and avoiding overhigh temperature can be achieved by reducing the input current of the conversion circuit. Meanwhile, the influence of the reduction of the input current on the input power of the conversion circuit can be counteracted by increasing the input voltage of the conversion circuit, the fluctuation of the input power of the conversion circuit is reduced, and the stability of the output power and the output electric quantity of the converter is favorably maintained while the over-temperature protection is carried out.
Drawings
FIG. 1 is a block diagram of a converter in one embodiment;
fig. 2 is a schematic diagram of the Boost voltage boosting circuit according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first capacitance may be referred to as a second capacitance, and similarly, a second capacitance may be referred to as a first capacitance, without departing from the scope of the present application. The first and second capacitances are both capacitances, but they are not the same capacitance.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.
In a first aspect of the present application, please refer to fig. 1, which provides a converter, comprising: a conversion circuit 100 for converting the electric energy output by the power supply and outputting the converted electric energy; a temperature acquisition device 200 for acquiring the temperature of the sensitive element in the conversion circuit 100; and the control chip 300 is used for increasing the input voltage of the conversion circuit 100 and reducing the input current of the conversion circuit 100 when the temperature of the sensitive element is greater than the first threshold value. The conversion circuit 100 is connected to a power supply, and the control chip 300 is connected to the temperature acquisition device 200 and the conversion circuit 100.
The conversion circuit 100 may be a rectification circuit, an inverter circuit, a boost circuit, or a buck circuit. The temperature acquisition device 200 is a device capable of sensing temperature and converting the sensed temperature into a usable output signal. The temperature acquisition device 200 may be a contact type temperature acquisition device or a non-contact type temperature acquisition device. For example, the temperature acquisition device 200 may be a thermal bulb, a thermocouple sensor, an infrared sensor, or the like. The control Chip 300 may be a programmable logic device such as an MCU (Single Chip Microcomputer) Chip or a DSP Chip. In summary, the embodiments of the present application do not limit the specific types of the conversion circuit 100, the temperature acquisition device 200 and the control chip 300.
The conversion circuit 100 is used for connecting a power supply, and converting electric energy output by the power supply and outputting the converted electric energy. The sensing element is a component of the switching circuit 100, and the magnitude of heat generated by the sensing element is positively correlated to the magnitude of current passing through the sensing element. The sensitive element may be the element which is most sensitive to temperature and most prone to overheat damage in the conversion circuit 100, and the converter fault caused by damage of the sensitive element can be effectively avoided by performing overheat control based on the temperature of the sensitive element. The sensitive element can also be a valuable device in the conversion circuit 100, and since the overcurrent damage is also represented as overheating damage, the overcurrent or overheating damage of the sensitive element can be avoided by carrying out the overtemperature control on the sensitive element, and the cost is saved. Further, the sensing element may be a switching tube or a heating resistor, and in short, the embodiment of the present application is not limited to a specific device type of the sensing element.
Specifically, after acquiring the temperature of the sensing element acquired by the temperature acquisition device 200, the control chip 300 compares the temperature with a preset first threshold value to determine whether the temperature is greater than or equal to the first threshold value. When the temperature of the sensitive element is greater than or equal to the first threshold value, namely, the sensitive element is in an over-temperature state, the risk of overheating damage exists. It is understood that different first threshold values may be set according to the characteristics of the sensitive elements in the conversion circuit 100. When the temperature of the sensing element is greater than or equal to the first threshold, the control chip 300 reduces the working current of the sensing element by reducing the input current of the conversion circuit 100, so as to reduce heat generation and achieve the purpose of over-temperature control. Meanwhile, the control chip 300 also reduces the fluctuation of the input power of the converter circuit 100 by increasing the input voltage of the converter circuit 100, thereby maintaining the stability of the output power of the converter circuit 100 while performing the over-temperature control. Further, the difference between the decreasing amplitude of the input current and the increasing amplitude of the input voltage may be smaller than the preset threshold value, so as to further maintain the stability of the input power of the conversion circuit 100.
It should be noted that, by reducing the input current of the converter circuit and increasing the input voltage of the converter circuit, the heat generation of the sensing element is reduced on the premise of maintaining the power, on the one hand, the inherent characteristics of the sensing element are considered, that is, when the current variation amplitude flowing through the sensing element is the same as the voltage variation amplitude at the two ends of the sensing element, the influence of the current variation on the heat generation is larger than the voltage variation. On the other hand, when the input voltage and the input current of the conversion circuit are changed, the current flowing through the sensitive element is changed to a greater extent than the voltage at both ends of the sensitive element due to the device composition and the connection manner of the conversion circuit, and the heat generation of the sensitive element is reduced.
As described above, since the conversion circuit 100 is connected to the power supply and converts the electric energy output from the power supply to output, the input voltage and the input current of the conversion circuit 100 are related to the output voltage and the output current of the power supply. The control chip 300 may directly control the input terminal of the conversion circuit 100 to increase the input voltage of the conversion circuit 100 and decrease the input current of the conversion circuit 100; the control chip 300 may also control the power supply to decrease the input current of the conversion circuit 100 by decreasing the output current of the power supply and to increase the input voltage of the conversion circuit 100 by increasing the output voltage of the power supply. The increasing amplitude of the input voltage and the decreasing amplitude of the input current can be respectively adjusted step by step according to preset adjusting amplitudes; the adjustment can also be performed according to the difference value between the current temperature and the first threshold, when the difference value is larger, the adjustment amplitude is increased, and when the difference value is smaller, the adjustment amplitude is decreased.
Further, when the temperature of the sensing element is less than the first threshold, the control chip 300 adjusts the working parameters of the power supply and the conversion circuit 100 based on a preset algorithm, so as to improve the power supply efficiency of the power supply system.
Furthermore, when the temperature of the sensing element is greater than or equal to the first threshold, the control chip 300 is further configured to determine whether the temperature of the sensing element is greater than a second threshold. The second threshold is greater than the first threshold, and when the temperature of the sensitive element is greater than the second threshold, the sensitive element is in a high-temperature state, and if the temperature of the sensitive element is not controlled in time, the risk of overheating damage exists. It will be appreciated that different second threshold values may be set in response to the characteristics of the sensitive elements in the conversion circuit. Specifically, if the temperature of the sensing element is less than or equal to the second threshold, the control chip 300 increases the input voltage of the conversion circuit 100, and decreases the input current of the conversion circuit 100; and if the temperature of the sensitive element is greater than a second threshold value, switching the converter into a standby mode. At this time, the converter operates with low power consumption, the heat generation amount is significantly reduced, and the control chip 300 continues to reacquire the temperature of the sensitive element based on a certain period and performs over-temperature control according to the reacquired temperature of the sensitive element. When the temperature of the sensitive element in the converter is greater than or equal to a second threshold value, maintaining the standby mode of the converter and continuously reducing the temperature of the sensitive element; when the temperature of a sensitive element in the converter is smaller than a second threshold value, the converter is quitted from the standby mode and is switched into the normal mode, and when the temperature of the sensitive element is larger than or equal to the first threshold value and smaller than the second threshold value, the input voltage of the conversion circuit is increased, the input current of the conversion circuit is reduced, and the temperature of the sensitive element is continuously reduced; when the temperature of a sensitive element in the converter is smaller than a first threshold value, working parameters of a power supply and a conversion circuit are adjusted based on a preset algorithm, and the power supply efficiency of a power supply system is improved.
In addition, after the control chip 300 adjusts the operating parameters of the conversion circuit 100 based on the current temperature of the sensitive element, the temperature of the sensitive element in the conversion circuit 100 is obtained again, and the over-temperature control is performed based on the newly obtained temperature of the sensitive element.
The converter comprises a conversion circuit 100, a temperature acquisition device 200 and a control chip 300. In the working process of the converter, the control chip 300 firstly obtains the temperature of the sensitive element in the conversion circuit 100; then, whether the acquired temperature of the sensing element is greater than or equal to the first threshold is determined, and when the temperature of the sensing element is greater than or equal to the first threshold, the input voltage of the conversion circuit 100 is increased, and the input current of the conversion circuit 100 is reduced. Since the heat generation of the sensing element is positively correlated to the current passing through the sensing element, the purpose of reducing heat generation and avoiding over-temperature can be achieved by reducing the input current of the conversion circuit 100. Meanwhile, the influence of the reduction of the input current on the input power of the conversion circuit 100 can be counteracted by increasing the input voltage of the conversion circuit 100, the fluctuation of the input power of the conversion circuit 100 is reduced, and the stability of the output power and the output electric quantity of the converter is favorably maintained when over-temperature control is carried out.
In one embodiment, the temperature acquisition device 200 is a bulb. The temperature sensing bulb is a sensor for monitoring the temperature through the change of inert liquid in the bulb along with the temperature. The inert liquid is typically a refrigerant.
In one embodiment, the sensing element is an IGBT, and the temperature acquisition device 200 is disposed on a substrate of the IGBT. The IGBT is a composite fully-controlled voltage-driven power Semiconductor device composed of a bipolar Transistor and a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), wherein the input terminal of the IGBT is the MOSFET, and the output terminal of the IGBT is the bipolar Transistor, which has the advantages of small driving power and high switching speed of the MOSFET device, and also has the advantages of reduced saturation voltage and large capacity of the bipolar device. If a positive driving voltage is added between the grid electrode and the emitting electrode of the IGBT, the MOSFET is conducted, so that the collector electrode and the base electrode of the bipolar transistor are in a low-resistance state to enable the transistor to be conducted; when the voltage between the gate and the emitter of the IGBT is 0V, the MOSFET is turned off, and the supply of the base current of the bipolar transistor is cut off, turning off the transistor. The IGBT works in a high-voltage large-current environment, and the IGBT element is expensive, so that the IGBT is set as a sensitive element, temperature detection is carried out on the sensitive element, temperature control is carried out on the basis of a detection result, and overheating and damage to the device are avoided.
Specifically, the IGBT is used as a switch of the switching circuit 100, and the control chip 300 is also used to control the operating state of the switching circuit 100 by controlling the IGBT. The temperature acquisition device 200 is installed on the insulated substrate of the IGBT, the temperature of the insulated substrate of the IGBT can be detected in real time, the temperature of the IGBT is further obtained, and the control chip 300 carries out over-temperature control according to the obtained temperature of the IGBT.
In the above embodiment, the IGBT is used as the switch of the converter circuit 100, which is beneficial to improving the electrical performance of the converter circuit 100. Meanwhile, the temperature acquisition device 200 is mounted on the insulated substrate of the IGBT to detect the temperature of the IGBT in real time, and the control chip 300 performs over-temperature control according to the acquired temperature of the IGBT, which is beneficial to improving the control effect of the over-temperature control.
In one embodiment, the converter is a DC-DC converter.
The DC-DC converter is a voltage converter that converts an input voltage into a stable output voltage, in which both the input voltage and the output voltage are direct currents. According to the magnitude relation between the input voltage and the output voltage, the DC-DC converter is divided into three categories: a step-up DC-DC converter, a step-down DC-DC converter, and a step-up/step-down DC-DC converter. Modulation methods of the DC-DC converter include a PWM (Pulse width modulation), a PFM (Pulse frequency modulation), and a conversion modulation method. The PWM DC-DC converter has the advantages that the frequency of switching pulses is constant, the output voltage is stable by changing the output width of the pulses, the efficiency is high, and good output voltage ripples and noises are realized. The pulse width of the switch of the PFM type DC-DC converter is constant, the output voltage is stable by changing the frequency of pulse output, and the PFM type DC-DC converter has the advantage of low power consumption when in small load. The conversion type DC-DC converter carries out PFM control under the condition of small load and automatically converts into PWM control under the condition of heavy load, and has the advantages of two modulation modes of PWM and PFM. In summary, the embodiment of the present application does not limit the specific type and modulation mode of the DC-DC converter.
In one embodiment, the conversion circuit 100 is a boost circuit. The boost circuit is also called a bootstrap circuit, and refers to a circuit with an output voltage greater than an input voltage. The boost circuit generally comprises electronic components such as a bootstrap boost diode and a bootstrap boost capacitor, and the effect of boosting the output voltage is achieved by controlling the superposition of the discharge voltage of the bootstrap boost capacitor and the output voltage of the power supply.
In the above embodiment, the boost circuit is used as a conversion circuit in the converter, and due to the boost function of the boost circuit, the output voltage of the boost circuit is greater than the output voltage of the power supply, so that even if the output voltage of the power supply is insufficient, the normal operation of the load can be maintained, the performance requirement of the load on the power supply can be reduced, the cost can be reduced, and the application scenario of the converter can be expanded.
In one embodiment, the Boost circuit is a Boost circuit. The Boost circuit is a switch direct current Boost circuit and is simple. Referring to fig. 2, the Boost circuit includes a first capacitor C1, an inductor L, a diode D1, a second capacitor C2, and a switching transistor IGBT. The first capacitor C1 is used for connecting a power supply, one end of the inductor L is connected to the first end of the first capacitor C1, the other end of the inductor L is connected to the anode of the diode D1, and the cathode of the diode D1 is connected to the output terminal. The second capacitor C2 is connected to the output terminal. The collector of the switch tube IGBT is connected to the anode of the diode D1, the emitter of the switch tube IGBT is connected to the second end of the first capacitor, and the gate of the switch tube IGBT is connected to the control chip 300.
Specifically, the control chip 300 is connected to the switching tube IGBT, and controls the operating state of the Boost circuit by controlling the on/off of the switching tube IGBT. When the switching tube IGBT is conducted, the input voltage Ui flows through the inductor L and the switching tube IGBT to form a loop to charge the first capacitor C1, the current in the inductor L is increased linearly along with the continuous charging, and the current is charged electricallyThe induction L is converted into magnetic energy for storage. In the process, the diode D1 is turned off, and the second capacitor C2 provides a load function to maintain the load operation. When the switching tube IGBT is disconnected, the inductor L slowly discharges through a loop formed by the diode D1, the first capacitor C1 and the second capacitor C2 to charge the second capacitor C2, and the electric energy at the two ends of the second capacitor C2 is superposed with a power supply to supply power to a load. The control chip 300 controls the on-off time of the switching tube IGBT based on the preset duty ratio, so that the output voltage U of the circuit can be maintained0And if the voltage is larger than the input voltage Ui, the boosting function is completed. Further, in an embodiment, the first capacitor C1 and the second capacitor C2 are both polar capacitors, wherein an anode of the first capacitor C1 is connected to an output anode of the power supply and the inductor L, and an anode of the second capacitor C2 is connected to a cathode of the diode D1.
In the above embodiments, the Boost voltage Boost circuit is used as the conversion circuit 100 in the converter, and since the Boost voltage Boost circuit has fewer devices and is simple in circuit, the circuit cost is reduced.
In one embodiment, the control chip is a DSP chip.
The DSP chip is a chip capable of realizing a digital signal processing technology, adopts a Harvard structure with a program and data separated from each other in the DSP chip, has a special hardware multiplier, widely adopts pipeline operation, provides a special DSP instruction, and can be used for quickly realizing various digital signal processing algorithms. Classifying according to a working clock and an instruction type, wherein the DSP chip comprises a static DSP chip and a consistent DSP chip; the DSP chips comprise fixed point DSP chips working in a fixed point format and floating point DSP chips working in a floating point format; the DSP chips include general DSP chips and special DSP chips, which are classified according to purposes. In summary, the embodiment of the present application does not limit the specific type of the DSP chip.
Further, in one embodiment, the model of the DSP chip is TMS320F 28335.
The TMS320F28335 is a TMS320C28x series 32-bit floating point DSP chip, has a high speed processing capability of 150MHz, has a 32-bit floating point processing unit, 6 DMA (Direct Memory Access) channels, supports various interfaces, and has 18-way PWM output, of which 6-way is a unique higher precision PWM output. Thanks to the floating point arithmetic unit, a user can quickly write a control algorithm without consuming excessive time and energy on decimal processing operation, compared with the prior DSP, the average performance of the TMS320F28335 is improved by 50 percent, and the TMS320F28335 is compatible with fixed point C28x controller software, thereby being beneficial to simplifying software development, shortening development period and reducing development cost.
In the above embodiment, the DSP chip is used as the control chip, and the performance of the converter is improved due to the advantages of good stability, fast operation speed, programmability, embeddability, and the like of the DSP chip.
In a second aspect of the present application, a power supply system is provided, which includes a power supply and the converter in the above embodiments.
For specific limitations of the converter, see above, no further description is provided here. Specifically, the power supply may be a dc power supply or an ac power supply. Correspondingly, the converter may be a dc-dc converter, a rectifier or an inverter. When the converter is a dc-dc converter, the power supply may be a photovoltaic or wind generator. Through the cooperation with the converter, can improve photovoltaic or aerogenerator's generated energy and energy conversion efficiency.
In one embodiment, the power supply is photovoltaic.
The photovoltaic is a solar photovoltaic power generation system for short, is a novel power generation system which directly converts solar radiation energy into electric energy by utilizing the photovoltaic effect of a solar cell semiconductor material and has two modes of independent operation and grid-connected operation. The embodiment of the application does not limit the specific operation mode of the photovoltaic module. The converter connected with the photovoltaic module can be a DC-DC converter or an inverter. The DC-DC converter can perform voltage boosting or voltage reducing conversion on direct-current voltage generated by the solar panel in the photovoltaic and then output the direct-current voltage to a load. The inverter can convert direct-current voltage generated by the solar panel into alternating current with commercial power frequency and feed the alternating current back to a commercial power supply system or an off-grid power grid. The converter used by matching with photovoltaic can have the function of tracking the maximum power point while having the function of over-temperature control. For the over-temperature control function of the converter, reference is made above, which is not repeated herein, and only the maximum power point tracking function of the converter is described below.
Specifically, the optimal operating point of the solar panel is called a maximum power point, and is mainly determined by the operating temperature of the solar panel and the current sunshine intensity. The maximum power points of the solar panels are different under different temperatures and sunshine intensities. In order to enable the solar panel to work at the Maximum Power Point as much as possible, the Maximum Power Point needs to be effectively tracked under the weather condition of rapid change based on an MPPT (Maximum Power Point Tracking) algorithm, and the solar panel is controlled to work at the Maximum Power Point as much as possible by adjusting the working parameters of the photovoltaic electrical module.
Specifically, when the temperature of the sensing element is less than the first threshold, the control chip 300 may implement maximum power point tracking in a constant voltage tracking manner. Under the premise of certain weather conditions, the control chip 300 may obtain the optimal operating voltage of the photovoltaic according to the relationship between the output power of the solar panel and the operating voltage, and adjust the operating voltage of the photovoltaic and conversion circuit 100 to the optimal operating voltage. When the photovoltaic power supply system operates at the fixed voltage, power maximization can be achieved. The control chip 300 may also output a control signal by comparing the conductance increment of the solar cell panel with the instantaneous conductance, so as to realize maximum power point tracking. Specifically, when the sum of the conductance increment and the instantaneous conductance is zero, the solar panel works at the maximum power point. Based on the above, when the sum of the conductance increment of the solar panel and the instantaneous conductance is greater than zero, the working voltage of the photovoltaic power supply system is increased; when the sum of the conductance increment and the instant conductance of the solar cell panel is less than zero, the working voltage of the photovoltaic power supply system is reduced, and the sum of the conductance increment and the instant conductance of the solar cell panel is close to zero through multiple times of regulation, so that the maximum power point can be reached. In addition, the control chip 300 may also compare the current output power with the output power collected last time, and adjust the working voltage of the photovoltaic power supply system according to the change condition of the output power, so that the photovoltaic power supply system works at the maximum power point.
In the above embodiment, when the temperature of the sensitive element is less than the first threshold, the control chip 300 adjusts the operating voltages of the photovoltaic and the conversion circuit based on the MPPT algorithm, so that the power supply system operates at the maximum power point, and the power generation efficiency of the photovoltaic and the conversion efficiency of the conversion circuit can be improved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A converter, comprising:
the conversion circuit is used for converting the electric energy output by the power supply and outputting the converted electric energy;
a temperature acquisition device for acquiring the temperature of the sensitive element in the conversion circuit; the heating magnitude of the sensing element is positively correlated with the current magnitude passing through the sensing element;
when the temperature of the sensitive element is larger than a first threshold value, the input voltage of the conversion circuit is increased, and the input current of the conversion circuit is reduced;
the conversion circuit is connected with the power supply, and the control chip is connected with the temperature acquisition device and the conversion circuit.
2. The converter according to claim 1, wherein the temperature acquisition device is a bulb.
3. The converter according to claim 1, wherein the sensing element is an IGBT, and the temperature acquisition device is disposed on a substrate of the IGBT.
4. The converter according to claim 1, wherein the converter is a DC-DC converter.
5. The converter of claim 4, wherein the conversion circuit is a boost circuit.
6. The converter of claim 5, wherein the Boost circuit is a Boost circuit.
7. The converter according to any one of claims 1 to 6, wherein the control chip is a DSP chip.
8. The converter according to claim 7, wherein the model of the DSP chip is TMS320F 28335.
9. A power supply system comprising a power supply and a converter according to any one of claims 1 to 8.
10. The power supply system of claim 9, wherein the power supply is photovoltaic.
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| CN202022841811.8U CN213637486U (en) | 2020-11-30 | 2020-11-30 | Converter and power supply system |
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| CN202022841811.8U CN213637486U (en) | 2020-11-30 | 2020-11-30 | Converter and power supply system |
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