CN209930131U - DC power supply device - Google Patents

Abstract

The embodiment of the utility model discloses a direct current power supply device, which comprises a conversion module, wherein the input end of the conversion module is electrically connected with an input power supply; the input end of the power conversion module is electrically connected with the output end of the conversion module; the input end of the filtering module is connected with the output end of the power conversion module, and the output end of the filtering module is electrically connected with the working load; a control module, the control module comprising: the input end of the first PFC component is electrically connected with the output end of the conversion module, and the output end of the first PFC component is electrically connected with the power conversion module; and the input end of the second PFC component is electrically connected with the output end of the filtering module, and the output end of the second PFC component is electrically connected with the input end of the power conversion module. The utility model discloses technical scheme through setting up a plurality of PFC subassemblies, has reached the technological effect who improves electric energy utilization.

Description

DC power supply device

Technical Field

The embodiment of the utility model provides a relate to the switch field, especially relate to a direct current power supply device.

Background

With the rapid development of the general switching regulator, the switching regulator is used in many occasions, and the high efficiency, miniaturization and high adaptability of the switching regulator are the future development directions of the switching regulator.

The input range of the current mining switching power supply has certain limitation, namely each mining switching power supply has a rated input voltage range, and when the input voltage range is exceeded, the switching power supply cannot be used and must be replaced by other grades of power supplies. In addition, the existing mining switch power supply only adds power factor correction at the input end.

However, the existing switching power supply is applied to mines, so that the use cost is increased, the adaptability is poor, and the transmission efficiency of electric energy is low.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model discloses DC power supply device to realize the mains voltage of adaptation wide range input.

In a first aspect, an embodiment of the present invention discloses a dc power supply apparatus, which includes a conversion module, wherein an input end of the conversion module is electrically connected to an input power supply, and is configured to remove electromagnetic interference from electrical energy and convert an input ac power into a dc power;

the input end of the power conversion module is electrically connected with the output end of the conversion module and is used for changing the voltage output by the conversion module;

the input end of the filtering module is connected with the output end of the power conversion module, and the output end of the filtering module is electrically connected with a working load and used for stabilizing and stabilizing the direct current to the current voltage required by the working load;

a control module, the control module comprising:

the input end of the first PFC component is electrically connected with the output end of the conversion module, and the output end of the first PFC component is electrically connected with the power conversion module and used for improving the power factor of the voltage output by the conversion module;

and the input end of the second PFC component is electrically connected with the output end of the filtering module, and the output end of the second PFC component is electrically connected with the input end of the power conversion module and used for improving the power factor of the voltage output by the filtering module.

Optionally, the conversion module includes:

the input end of the EMI component is used as the input end of the conversion module and is used for eliminating electromagnetic interference in electric energy;

and the input end of the rectifying assembly is electrically connected with the output end of the EMI assembly, and the output end of the rectifying assembly is used as the output end of the conversion module and is used for converting alternating current into direct current.

Optionally, the control module further includes:

the input end of the third PFC component is electrically connected with the output end of the filtering module and used for feeding back the voltage output by the filtering module;

and the input end of the PWM component is electrically connected with the output end of the third PFC component, and the output end of the PWM component is electrically connected with the input end of the power conversion module and used for converting a voltage signal into a pulse signal and sending the pulse signal to the power conversion module.

Optionally, the method further includes, between the power conversion module and the filtering module:

the input end of the PWM module is electrically connected with the output end of the power conversion module, and the output end of the PWM module is connected with the input end of the filtering module and used for converting the voltage signal output by the power conversion module into a pulse signal and sending the pulse signal to the filtering module.

Optionally, the method further includes:

and the protection module is used for receiving the voltage signals output by the conversion module and the filtering module and judging whether the voltage signals meet preset working parameters.

Optionally, the protection module includes:

the input end of the input voltage protection component is electrically connected with the output end of the conversion module, and the output end of the input voltage protection component is electrically connected with the input end of the first PFC component, is electrically connected with the input end of the PWM component, and is used for detecting a voltage signal output by the conversion module;

the input end of the short-circuit protection component is electrically connected with the output end of the filtering module, and the output end of the short-circuit protection component is electrically connected with the input end of the PWM component and used for judging whether the filtering module is in short circuit or not;

the input end of the current-limiting protection component is electrically connected with the output end of the filtering module, and the output end of the current-limiting protection component is electrically connected with the input end of the PWM component and used for detecting the current output by the filtering module;

the output overvoltage protection component, the input end of the output overvoltage protection component is electrically connected with the output end of the filtering module, and the output end of the output overvoltage protection component is electrically connected with the input end of the PWM component and used for detecting the voltage output by the filtering module.

Optionally, the control module further includes:

the input end of the sampling assembly is electrically connected with the output end of the filtering module, and the output end of the sampling assembly is electrically connected with the input end of the PWM assembly and used for collecting the voltage output by the filtering module.

Optionally, the control module further includes:

and the input end of the voltage stabilizing component is electrically connected with the output end of the sampling component, and the output end of the voltage stabilizing component is electrically connected with the input end of the PWM component and used for controlling the voltage collected by the sampling component to be kept unchanged.

Optionally, the method further includes:

a housing, the conversion module, the power conversion module, the filtering module, and the control module being disposed inside the housing.

The embodiment of the utility model provides a, through setting up a plurality of PFC subassemblies, also set up a PFC subassembly behind output voltage, solved the not accurate enough and stable problem of voltage of output among the mining DC power supply device, overcome the technical defect who increases the PFC subassembly, reach the technological effect who improves electric energy utilization.

Drawings

Fig. 1A is a schematic structural diagram of a dc power supply device according to an embodiment of the present invention;

fig. 1B is a schematic structural diagram of a control module of a dc power supply device according to an embodiment of the present invention;

fig. 2A is a schematic structural diagram of a dc power supply device according to a second embodiment of the present invention;

fig. 2B is a schematic structural diagram of a conversion module of a dc power supply device according to a second embodiment of the present invention;

fig. 2C is a schematic structural diagram of the dc power supply apparatus provided by the second embodiment of the present invention including a sampling assembly;

fig. 2D is a schematic structural diagram of the dc power supply device further including a voltage stabilizing component according to the second embodiment of the present invention;

fig. 3A is a schematic structural diagram of a dc power supply device including a protection module according to a third embodiment of the present invention;

fig. 3B is a schematic structural diagram of a protection module of a dc power supply device according to a third embodiment of the present invention;

fig. 3C is a schematic structural diagram of a dc power supply device including a PWM module according to a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of a dc power supply device including a housing according to a fourth embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

Example one

Fig. 1A is a schematic structural diagram of a dc power supply device according to an embodiment of the present invention, which is applicable to a situation where a wide-range input ac power is converted into a working voltage required by a working load. As shown in fig. 1A, the first embodiment provides a dc power supply apparatus 100, which includes a conversion module 110, a power conversion module 120, a filtering module 130, and a control module 140. As shown in fig. 1B, the control module 140 includes a first PFC (Power factor correction) component 141 and a second PFC component 142.

The input end of the conversion module 110 is electrically connected to an input power source, and is configured to remove electromagnetic interference from the electrical energy and convert the input ac power into dc power. The input terminal of the power conversion module 120 is electrically connected to the output terminal of the conversion module 110, and is used for changing the voltage output by the conversion module 110. The input end of the filtering module 130 is connected to the output end of the power conversion module 120, and the output end of the filtering module 130 is electrically connected to the working load, and is configured to stabilize and stabilize the dc current to the current and voltage required by the working load. The control module 140 includes a first PFC component 141 and a second PFC component 142, wherein an input terminal of the first PFC component 141 is electrically connected to an output terminal of the conversion module 110, and an output terminal of the first PFC component 141 is electrically connected to the power conversion module 120, so as to increase a power factor of the voltage output by the conversion module 110. The input end of the second PFC component 142 is electrically connected to the output end of the filtering module 130, and the output end of the second PFC component 142 is electrically connected to the input end of the power conversion module 120, so as to improve the power factor of the voltage output by the filtering module 130.

Specifically, the input power supply inputs alternating current, and the voltage range is determined according to the actual working environment. Preferably, the voltage is 65 to 280V. After the electric energy input by the input power source passes through the conversion module 110, the alternating current becomes the direct current. The dc power is then converted to a working voltage that satisfies the working load by the power conversion module 120. Specifically, the power conversion module 120 may be a single-ended flyback circuit, a double-ended flyback circuit, or another circuit capable of changing voltage, such as a BUCK chopper BUCK circuit, which is not limited herein. Preferably, the power conversion module 120 is a double-ended flyback circuit, and the voltage range of the input power input can be wider. The voltage output by the power conversion module 120 may be adjusted as needed, and preferably, the voltage may be adjusted to be 5V, 12V, or 24V, which is not limited herein. The voltage output through the power conversion module 120 still has an ac component, and therefore the ac component is removed by the filtering module 130. The control module 140 includes a first PFC component 141 and a second PFC component 142. The first PFC component 141 detects a power factor of the power output through the conversion module 110, and controls the power conversion module 120 to increase the power factor if the power factor is low. The second PFC component 142 detects a power factor of the power output from the filtering module 130, and controls the power conversion module 120 to increase the power factor if the power factor is low. Preferably, the power factor is increased to 96%, which is economical.

In the embodiment, the conversion module and the filtering module are provided with the PFC component, so that the power factor of the electric energy can be detected and corrected in the aspects of converting the electric energy into the direct current and supplying the electric energy to the working load, and the utilization rate of the electric energy is improved.

Example two

Fig. 2A is a schematic structural diagram of a dc power supply device according to an embodiment of the present invention, and the technical solution provided by this embodiment is refined on the basis of the above technical solution, and is applicable to a scene for increasing the power factor correction component. As shown in fig. 2A, the control module 140 further includes a third PFC component 143 and a pulse width modulation PWM component 144. The input terminal of the third PFC component 143 is electrically connected to the output terminal of the filtering module 130, and is configured to feed back the voltage output by the filtering module 130. An input end of the PWM component 144 is electrically connected to an output end of the third PFC component 143, and an output end of the PWM component 144 is electrically connected to an input end of the power conversion module 120, for converting the voltage signal into a pulse signal and sending the pulse signal to the power conversion module 120.

Specifically, the third PFC component 143 detects the voltage output by the filtering module 130 and transmits a voltage signal to the PWM component 144. The PWM component 144 receives the voltage signal transmitted by the third PFC component 143, converts the voltage signal into a pulse signal, sends the pulse signal to the power conversion module 120, and controls the on/off of the switching tube in the power conversion module 120 through the pulse signal. The switching tube can be a relay, so that the switching tube is controlled to be switched on and off through pulse signals, and other circuits or components capable of achieving the functions of the switching tube can replace the relay, and the relay is not limited here.

Optionally, as shown in fig. 2B, the conversion module 110 includes an EMI (electromagnetic interference) component 111 and a rectifying component 112. The input of the EMI assembly 111 serves as the input of the conversion module 110 for removing electromagnetic interference from the electrical energy. The input end of the rectifying component 112 is electrically connected to the output end of the EMI component 111, and the output end of the rectifying component 112 serves as the output end of the converting module 110, and is used for converting the alternating current into the direct current.

The power of the input power is alternating current, the alternating current has great electromagnetic interference, the EMI component 111 is connected with the input power, the electromagnetic interference of the power can be greatly reduced, and the power without electromagnetic interference is transmitted to the rectifying component 112. The electric energy is also alternating current, and the alternating current needs to be converted into direct current. The rectifier module 112 is a circuit that converts an alternating voltage that changes in positive and negative into a unidirectional pulsating voltage by utilizing the unidirectional conductivity of a diode. Optionally, the rectifying component 112 may be a half-wave rectifying circuit, a full-wave rectifying circuit or a bridge rectifying circuit, which is not limited herein. Preferably, the rectifying component 112 is a bridge rectifier circuit, and the output is high-frequency direct current.

Optionally, as shown in fig. 2C, the control module may further include a sampling component 145. The input end of the sampling component 145 is electrically connected with the output end of the filtering module 130, and the output end of the sampling component 145 is electrically connected with the input end of the PWM component 144, and is used for collecting the voltage output by the filtering module 130.

Specifically, whether the voltage meets the requirement of the work load is determined by collecting the voltage output by the filtering module 130. If the voltage is not within the preset range, the PWM component 144 controls the power conversion module 120 to output the operating voltage within the preset range. For example, if a voltage of 5V needs to be output, the preset range may be 4.9-5.1V, or 4.95-5.05V, and may be set as needed, which is not limited herein.

Optionally, as shown in fig. 2D, a voltage stabilizing component 146 may be further included between the PWM component 144 and the sampling component 145. The input end of the voltage stabilizing component 146 is electrically connected with the output end of the sampling component 145, and the output end of the voltage stabilizing component 146 is electrically connected with the input end of the PWM component 144, so as to control the voltage collected by the sampling component 145 to be kept unchanged. The voltage sampled by the sampling component 145 may fluctuate, which may cause the pulse signal sent by the PWM component 144 to be inaccurate. By providing a voltage stabilizing component 146, the collected voltage can be in a stable state, and the fluctuation is very small, so that the pulse signal sent by the PWM component 144 is more accurate.

In the embodiment, the third PFC component and the PWM component are added, and the voltage signal is converted into the pulse signal through the PWM component, so that the switching on and off of the switching tube of the power conversion module are controlled, and the voltage output by the power conversion module is controlled more accurately.

EXAMPLE III

Fig. 3A is a schematic structural diagram of the dc power supply device provided in the third embodiment of the present invention, which includes a protection module, and the technical solution provided in this embodiment is refined on the basis of the above technical solution, and is applicable to the scene of protecting the dc power supply device. As shown in fig. 3A, the dc power supply apparatus 100 further includes a protection module 150. As shown in fig. 3B, the protection module 150 includes an input voltage protection component 151, a short-circuit protection component 152, a current limiting protection component 153, and an output overvoltage protection component 154.

An input end of the input voltage protection component 151 is electrically connected to an output end of the conversion module 110, and an output end of the input voltage protection component 151 is electrically connected to an input end of the first PFC component 141 and to an input end of the PWM component 144, and is configured to detect a voltage signal output by the conversion module 110. An input end of the short-circuit protection component 152 is electrically connected to an output end of the filtering module 130, and an output end of the short-circuit protection component 152 is electrically connected to an input end of the PWM component 144, so as to determine whether the filtering module 130 is short-circuited. The input end of the current-limiting protection component 153 is electrically connected to the output end of the filtering module 130, and the output end of the current-limiting protection component 153 is electrically connected to the input end of the PWM component 144, and is configured to detect the current output by the filtering module 130. The input terminal of the output overvoltage protection component 154 is electrically connected to the output terminal of the filter module 130, and the output terminal of the output overvoltage protection component 154 is electrically connected to the input terminal of the PWM component 144, for detecting the voltage output by the filter module 130.

Specifically, the input voltage protection component 151 detects the voltage output by the conversion module 110, and determines whether the output voltage is an overvoltage or an undervoltage. If the voltage is an overvoltage, a voltage signal is sent to the PWM component 144, and the PWM component 144 converts the voltage signal into a pulse signal, thereby controlling the power conversion module 120 to output a normal operating voltage. If the voltage output by the conversion module 110 is under-voltage, a voltage signal is sent to the first PFC component 141, thereby increasing the power factor of the circuit.

The output end of the filtering module 130 is connected with a short-circuit protection component 152, a current-limiting protection component 153 and an output overvoltage protection component 154 respectively. If the voltage output by the filtering module 130 is zero, it indicates that the filtering module 130 is short-circuited, and the short-circuit protection component 152 enables the switching tube of the power conversion module 120 to be in a normally-open state through the PWM component 144, so that it forms an open circuit, and prevents a danger caused by a continuous short circuit. If the current outputted from the filtering module 130 is too large, which may affect the normal operation of the working load, at this time, the current limiting protection component 153 changes the pulse signal through the PWM component 144, so as to control the power conversion module 120, and reduce the outputted current. If the output voltage is too large, the normal operation of the working load can be affected, and even the working load can be damaged. At this time, the output overvoltage protection component 154 changes the pulse signal through the PWM component 144 to control the power conversion module 120 to reduce the output voltage.

Optionally, as shown in fig. 3C, the dc power supply apparatus 100 may further include a PWM module 160. The PWM module 160 is connected between the power conversion module 120 and the filtering module 130, an input terminal of the PWM module 160 is electrically connected to an output terminal of the power conversion module 120, and an output terminal of the PWM module 160 is connected to an input terminal of the filtering module 130, and is configured to convert the voltage signal output by the power conversion module 120 into a pulse signal and send the pulse signal to the filtering module 130.

The protection module is additionally arranged in the direct-current power supply device in the implementation, whether the direct-current power supply device is short-circuited or not is detected, whether the output voltage and current are overlarge or not is detected, the working load is prevented from being damaged due to the overlarge voltage and current, and the technical effect of protecting the working load is achieved.

Example 4

Fig. 4 is the structural schematic diagram of the dc power supply device in the fourth embodiment of the present invention, which includes the housing, in this embodiment, the dc power supply device is refined on the basis of the above technical solution, and is suitable for the situation that the dc power supply device is a fully-enclosed one.

As shown in fig. 4, the dc power supply device 100 further includes a housing 170, and the conversion module 110, the power conversion module 120, the filtering module 130 and the control module 140 are disposed inside the housing 170. The material of the shell can be plastic or metal. Preferably, the material of the housing 170 is metal, which has good heat dissipation. The inner space of the case 170 is entirely filled with a filler, and preferably, a filler having a good heat dissipation property is used.

The technical effect of moisture resistance can be achieved by arranging the shell and filling the empty part in the shell with the filler.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (9)

1. A direct-current power supply device, comprising:

the input end of the conversion module is electrically connected with an input power supply and is used for eliminating electromagnetic interference in electric energy and converting input alternating current into direct current;

the input end of the power conversion module is electrically connected with the output end of the conversion module and is used for changing the voltage output by the conversion module;

the input end of the filtering module is connected with the output end of the power conversion module, and the output end of the filtering module is electrically connected with a working load and used for stabilizing and stabilizing the direct current to the current voltage required by the working load;

a control module, the control module comprising:

the input end of the first PFC component is electrically connected with the output end of the conversion module, and the output end of the first PFC component is electrically connected with the power conversion module and used for improving the power factor of the voltage output by the conversion module;

and the input end of the second PFC component is electrically connected with the output end of the filtering module, and the output end of the second PFC component is electrically connected with the input end of the power conversion module and used for improving the power factor of the voltage output by the filtering module.

2. The dc power supply apparatus of claim 1, wherein the conversion module comprises:

the input end of the EMI component is used as the input end of the conversion module and is used for eliminating electromagnetic interference in electric energy;

and the input end of the rectifying assembly is electrically connected with the output end of the EMI assembly, and the output end of the rectifying assembly is used as the output end of the conversion module and is used for converting alternating current into direct current.

3. The dc power supply apparatus of claim 1, wherein the control module further comprises:

the input end of the third PFC component is electrically connected with the output end of the filtering module and used for feeding back the voltage output by the filtering module;

and the input end of the PWM component is electrically connected with the output end of the third PFC component, and the output end of the PWM component is electrically connected with the input end of the power conversion module and used for converting a voltage signal into a pulse signal and sending the pulse signal to the power conversion module.

4. The dc power supply apparatus of claim 1, further comprising, intermediate the power conversion module and the filtering module:

the input end of the PWM module is electrically connected with the output end of the power conversion module, and the output end of the PWM module is connected with the input end of the filtering module and used for converting the voltage signal output by the power conversion module into a pulse signal and sending the pulse signal to the filtering module.

5. The direct-current power supply apparatus according to claim 3, further comprising:

and the protection module is used for receiving the voltage signals output by the conversion module and the filtering module and judging whether the voltage signals meet preset working parameters.

6. The dc power supply apparatus of claim 5, wherein the protection module comprises:

the input end of the input voltage protection component is electrically connected with the output end of the conversion module, and the output end of the input voltage protection component is electrically connected with the input end of the first PFC component, is electrically connected with the input end of the PWM component, and is used for detecting a voltage signal output by the conversion module;

the input end of the short-circuit protection component is electrically connected with the output end of the filtering module, and the output end of the short-circuit protection component is electrically connected with the input end of the PWM component and used for judging whether the filtering module is in short circuit or not;

the input end of the current-limiting protection component is electrically connected with the output end of the filtering module, and the output end of the current-limiting protection component is electrically connected with the input end of the PWM component and used for detecting the current output by the filtering module;

the output overvoltage protection component, the input end of the output overvoltage protection component is electrically connected with the output end of the filtering module, and the output end of the output overvoltage protection component is electrically connected with the input end of the PWM component and used for detecting the voltage output by the filtering module.

7. The dc power supply apparatus of claim 3, wherein the control module further comprises:

the input end of the sampling assembly is electrically connected with the output end of the filtering module, and the output end of the sampling assembly is electrically connected with the input end of the PWM assembly and used for collecting the voltage output by the filtering module.

8. The dc power supply apparatus of claim 7, wherein the control module further comprises:

and the input end of the voltage stabilizing component is electrically connected with the output end of the sampling component, and the output end of the voltage stabilizing component is electrically connected with the input end of the PWM component and used for controlling the voltage collected by the sampling component to be kept unchanged.

9. The direct-current power supply apparatus according to any one of claims 1 to 8, further comprising:

a housing, the conversion module, the power conversion module, the filtering module, and the control module being disposed inside the housing.

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