CN210111846U - Start control circuit and household electrical appliance - Google Patents
Start control circuit and household electrical appliance Download PDFInfo
- Publication number
- CN210111846U CN210111846U CN201921025586.1U CN201921025586U CN210111846U CN 210111846 U CN210111846 U CN 210111846U CN 201921025586 U CN201921025586 U CN 201921025586U CN 210111846 U CN210111846 U CN 210111846U
- Authority
- CN
- China
- Prior art keywords
- voltage
- switching tube
- power supply
- module
- factor correction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The utility model provides a start control circuit and tame electric installation, wherein, drive control includes: the power supply module and the boost power factor correction module further comprise: the first switching tube is arranged between the output end of the power supply module and the corresponding input end of the power factor correction module; the switching device is arranged between the first switching tube and the power factor correction module, the anode of the switching device is connected to the high-voltage input end of the power factor correction module, and the cathode of the switching device is connected to the low-voltage input end of the power factor correction module; and the starting module is respectively connected to the control electrode and the input stage of the first switching tube, and if the power supply module outputs a pulsating direct current signal, the starting module configures the first switching tube into a conducting state so as to supply power to the load through the power factor correction module. Through the technical scheme of the utility model, can make the start control circuit normal boot that has voltage control function.
Description
Technical Field
The utility model relates to a circuit control technical field particularly, relates to a start control circuit and a household electrical appliances.
Background
In order to implement a voltage reduction function in a BOOST PFC (Power Factor Correction) voltage regulation circuit, a first switching tube needs to be arranged between a rectifier and a PFC module, and if the first switching tube is in an off state before a control circuit is started, a Power supply cannot supply Power to a control unit, so that the control circuit cannot work.
SUMMERY OF THE UTILITY MODEL
The present invention aims at least solving one of the technical problems existing in the prior art or the related art.
Therefore, an object of the present invention is to provide a start control circuit.
Another object of the present invention is to provide a household electrical appliance.
In view of this, according to the technical solution of the first aspect of the present invention, a start control circuit is provided, including: power module and the power factor correction module of type that steps up, power module are used for exporting the pulsation direct current signal, and power factor correction module is used for carrying out power factor correction and obtaining bus direct current signal to the pulsation direct current signal, and start-up control circuit still includes: the first switching tube is arranged between the output end of the power supply module and the corresponding input end of the power factor correction module; the switching device is arranged between the first switching tube and the power factor correction module, an input electrode of the switching device is connected to a high-voltage input end of the power factor correction module, and an output stage of the switching device is connected to a low-voltage input end of the power factor correction module; and the starting module is respectively connected to the control electrode and the input stage of the first switching tube, and if the power supply module outputs a pulsating direct current signal, the starting module configures the first switching tube into a conducting state so as to supply power to the load through the power factor correction module.
According to the utility model discloses technical scheme's start control circuit, through set up the starting module between the input stage at first switch tube, starting module is used for when power module opens the power supply, configures first switch tube into on-state, on the one hand, can make the start control circuit who has voltage regulatory function normally start, and on the other hand also can guarantee the reliability that the circuit adjusted to the direct current voltage.
As can be understood by those skilled in the art, in the related art, since the controller is powered by the back end, the telephone that cannot be powered on cannot output the control instruction, in the present application, the controller is powered on by the starting module, so as to implement the control function of the controller.
The starting module can directly control the conduction of the first switch tube, and can also control the conduction of the first switch tube under the triggering of the pulsating direct current signal output by the power supply module.
In addition, the switch device is connected with the high-voltage input end to be determined as an input pole, and is connected with the low-voltage input end to be determined as an output pole.
In the foregoing technical solution, optionally, the switching device is a first diode, an anode of the first diode is determined as an output stage of the switching device, and a cathode of the first diode is determined as an input electrode of the switching device.
In the foregoing technical solution, optionally, the switch device is a third switch tube, where the third switch tube includes an IGBT (Insulated Gate Bipolar Transistor) type power Transistor and a MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor), the MOSFET includes a SiC-MOSFET and a GaN-MOSFET, and the third switch tube is turned off or turned on by receiving a control signal.
According to the utility model discloses above-mentioned technical scheme's start control circuit can also have following technical characteristic:
in the above technical solution, optionally, an input stage of the first switching tube is connected to a high-voltage output end of the power supply module, and an output stage of the first switching tube is connected to a high-voltage input end of the power factor correction module; the starting module comprises a bootstrap diode, a bootstrap capacitor and a direct-current starting power supply, wherein the anode of the bootstrap diode is connected to the input stage of the first switching tube, the cathode of the bootstrap diode is connected to the anode of the bootstrap capacitor, and the cathode of the bootstrap capacitor is connected to the low-voltage output end of the power supply module; the positive pole of the direct current starting power supply is connected to the control pole of the first switching tube, and the negative pole of the direct current starting voltage is connected to the common connection end of the bootstrap diode and the bootstrap capacitor.
Wherein, the collector of the first switch tube is determined as the input pole, and the emitter is determined as the output pole.
In this technical scheme, as the first implementation of starting module, through setting up bootstrap diode, bootstrap electric capacity and direct current starting power supply, after power module output power supply signal, can control the second diode and switch on, in order to charge bootstrap electric capacity, after bootstrap electric capacity charges and accomplishes, can make the voltage stack of the discharge voltage of bootstrap electric capacity and direct current starting power supply, thereby make the voltage difference at the control pole both ends of first switch tube satisfy first switch tube conduction demand, switch on with control first switch tube, through setting up bootstrap circuit, can be under the prerequisite that sets up the direct current starting power supply that has less supply voltage, discharge through the electric capacity and realize the step-up of the voltage between the control pole and the input stage of first switch tube, so that first switch tube switches on.
The starting circuit of the external power supply is provided with a bootstrap diode and a bootstrap capacitor to form a bootstrap circuit, and then an external direct-current starting power supply is used for closing the first switch tube to complete the starting process of the starting control circuit.
After the start-up is completed, the direct current start-up power supply can be cut off, and the controller is used for driving and controlling the first switch tube.
And the bootstrap circuit is adopted to control the conduction of the first switch tube, and the first switch tube is arranged between the high-voltage output end of the power supply module and the high-voltage input end of the corresponding power factor correction module.
In the above technical solution, optionally, an input stage of the first switching tube is connected to a low-voltage output end of the power supply module, and an output stage of the first switching tube is connected to a low-voltage input end of the power factor correction module; the starting module comprises a direct-current starting power supply, the positive pole of the direct-current starting power supply is connected to the control pole of the first switching tube, and the negative pole of the direct-current starting power supply is connected to the input stage of the first switching tube.
In this technical scheme, as the second implementation mode of starting module, if first switch tube sets up between the low voltage output of power module and the low voltage input of the power factor correction module that corresponds, then can set up a direct current starting power that can satisfy first switch tube directly between the control pole of first switch tube and input stage, through the input of being connected to first switch tube with the negative pole of direct current starting power, be connected to the output of direct current switch tube with the positive pole, in order to form the voltage difference at both ends, thereby control first switch tube and switch on, through the mode that only sets up direct current starting power, make starting module's structure simpler.
After the start-up is completed, the direct current start-up power supply can be cut off, and the controller is used for driving and controlling the first switch tube.
In the above technical solution, optionally, an input stage of the first switching tube is connected to a low-voltage output end of the power supply module, and an output stage of the first switching tube is connected to a low-voltage input end of the power factor correction module; the starting module comprises a voltage-stabilizing capacitor, a first voltage-dividing resistor and a second voltage-dividing resistor which are connected in series, the first voltage-dividing resistor is connected to the high-voltage output end of the power supply module, the second voltage-dividing resistor is connected to the low-voltage output end of the power supply module, and the voltage-stabilizing capacitor and the second voltage-dividing resistor are arranged in parallel.
In the technical solution, as a third implementation manner of the starting module, if the first switch tube is disposed between the low-voltage output end of the power supply module and the low-voltage input end of the corresponding power factor correction module, in addition to the second manner of adding an external dc starting power supply, it is also possible to configure and conduct the first switch tube without an external power supply, but only by triggering the pulsating dc signal of the power supply module, specifically, a first voltage dividing resistor and a second voltage dividing resistor are connected in series between the high-voltage output end and the low-voltage output end of the power supply module, and a voltage stabilizing capacitor is connected in parallel to two ends of the second voltage dividing resistor, a common connection point between the two voltage dividing resistors is connected to the control electrode of the first switch tube, so that after the power supply module outputs the pulsating power supply signal, the voltage stabilizing capacitor is charged, after the voltage stabilizing current is charged, the starting power supply for supplying power to the first switch tube is formed with the second voltage dividing resistor, the first switch tube is controlled to be conducted, and the energy consumption of the whole starting control circuit can be smaller by adopting the triggering starting mode.
Specifically, the first switch tube is arranged on the low-voltage side of the current bus, namely, the low-voltage output end of the power supply module, the first voltage dividing resistor, the second voltage dividing resistor and the voltage stabilizing capacitor form a resistor voltage dividing type starting circuit, voltage of the high-voltage side is divided through the resistor, the first switch tube is driven after the capacitor is stabilized, the circuit is started, and after the starting is completed, the resistor loop can be disconnected, so that loss is reduced.
In any of the above technical solutions, optionally, the power factor correction module includes: the anode of the second diode is connected to the input stage of the second switching tube, the cathode of the second diode is connected to the anode of the filter capacitor, and the cathode of the filter capacitor is connected to the input stage of the second switching tube.
In the technical scheme, the first switch tube is controlled to be closed, the anode of the first diode is connected to the low-voltage side of the pulsating direct current signal at the moment, the cathode of the first diode is connected to the high-voltage side of the pulsating direct current signal, so that the first diode is cut off, a BOOST booster circuit is formed by inputting a control signal of a second duty ratio to the second switch tube, the first switch tube and the first diode are combined to form a BUCK-BOOST type driving circuit, the BOOST booster circuit has a boosting function and a voltage reducing function, and therefore the regulation of the voltage of the direct current bus can be realized, and boosting or voltage reducing can be realized.
The first switch tube and the second switch tube may include a metal oxide semiconductor field effect transistor (i.e., MOSFET) or a semiconductor transistor, wherein a gate of the MOSFET is used as a control electrode, and a base of the semiconductor transistor is used as a control electrode.
In any of the above technical solutions, optionally, the method further includes: and the controller can be connected to the control electrode of the first switching tube and the control electrode of the second switching tube, in the voltage boosting mode, the controller controls the first switching tube to keep a conducting state, and inputs a control signal with a first duty ratio to the second switching tube to realize the voltage boosting of the pulsating direct current signal, and in the voltage reducing mode, the controller controls the second switching tube to keep a cut-off state, and inputs a control signal with a second duty ratio to the first switching tube.
In the technical scheme, on the basis of a power factor correction module with a boosting function, a first switch tube and a first diode are arranged, a controller outputs a corresponding control signal, before a voltage reduction operation needs to be executed, a second switch tube in the power factor correction module is controlled to be disconnected, at the moment, the first switch tube is connected with the first diode in series to form a BUCK circuit, and a control signal with a first duty ratio is further input into the first switch tube to control the first switch tube to be switched on and switched off so as to have the boosting function and the voltage reduction function simultaneously, on one hand, when the power factor correction module is used for supplying power to a small load, the voltage reduction operation is executed, when the power factor correction module is used for supplying power to a large load, the boosting operation is executed, so that the application range of the starting control circuit can be improved, the power supply requirements on loads with different power consumptions are met, on the other hand, when the fluctuation of a pulse direct current signal is large, by performing the step-down operation on the input voltage, it is also advantageous to reduce the voltage fluctuation of the dc bus for supplying power to the load, so as to ensure the normal operation of the start-up control circuit.
Wherein, in the mode of stepping up, for the boost circuit mode when first switch tube keeps closed, through switching on and the shutoff of second switch tube, realize raising of direct current bus voltage, the second switch tube switches on, and the power charges for the inductance, and the electric capacity supplies power for the load, and the second switch tube is shut off, and power and inductance are simultaneously for electric capacity charging, and direct current bus voltage rises.
In any of the above technical solutions, optionally, the power factor correction module further includes: and one end of the energy storage inductor is connected to the cathode of the first diode, the other end of the energy storage inductor is connected to the anode of the second diode, wherein one end of the energy storage inductor is determined as a high-voltage input end, and the output stage of the second switching tube is determined as a low-voltage input end.
In any of the above technical solutions, optionally, the power factor correction module further includes: one end of the energy storage inductor is connected to the anode of the first diode, and the other end of the energy storage inductor is connected to the output stage of the second switching tube; and one end of the energy storage inductor is determined as a low-voltage input end, and the input stage pole of the second switching tube is determined as a low-voltage input end.
In the technical scheme, the power factor correction function is realized by matching the filter capacitor with the energy storage inductor and combining the second diode for preventing the filter capacitor from reversely charging the energy storage inductor.
Wherein, energy storage inductance can enough set up in high-voltage bus side, also can set up in low-voltage bus side, combines the different setting position of first switch tube, satisfies different design structure's demand.
In any of the above technical solutions, optionally, the power supply module includes: the power supply is used for outputting an alternating current power supply signal; and the rectifier is used for converting the alternating current power supply signal into a pulsating direct current signal.
In the technical scheme, the power supply module is provided with a rectifier, alternating current output from a power supply can be converted into direct current, and the direct current is supplied to a load or an inverter after being filtered, so that clutter interference is eliminated, and voltage is output more stably; on the other hand, the capacitor can be charged through the rectifier, and the use stability of the starting control circuit is further improved.
In any of the above technical solutions, optionally, the method further includes: and the inverter is connected with the filter capacitor in parallel and is configured to control the bus direct-current signal to drive the load to operate.
In the technical scheme, the inverter converts direct-current voltage into alternating-current voltage, provides high-quality alternating current for the load, can drive any kind of load, meets most power consumption requirements, and enables the application range of the starting control circuit to be wider.
According to the utility model discloses technical scheme of second aspect provides a household electrical appliances, include: a load; as in the start-up control circuit in the above technical solution, the start-up control circuit is connected between the power supply and the load, and the start-up control circuit is configured to control the power supply signal to supply power to the load.
In the above technical solution, the household electrical appliance includes at least one of an air conditioner, a refrigerator, a fan, a range hood, a dust collector, and a computer host.
In this scheme, household electrical appliances include but not limited to one or more in air conditioner, refrigerator, fan, smoke ventilator, dust catcher and the computer, and it can be understood that, above-mentioned electrical appliances all can dispose the utility model provides a start control circuit's structure reaches the purpose of direct current voltage regulating circuit automatic start.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic diagram of a voltage regulation circuit without a start-up module according to an embodiment of the present invention;
fig. 2 shows a schematic diagram of a start-up control circuit according to another embodiment of the present invention;
fig. 3 shows a schematic diagram of a start-up control circuit according to yet another embodiment of the present invention;
fig. 4 shows a schematic diagram of a start-up control circuit according to yet another embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1, the start control circuit according to an embodiment of the present invention includes: power module and power factor correction module, power module are used for exporting the pulsation direct current signal, and power factor correction module is used for carrying out power factor correction and obtaining direct current signal to the pulsation direct current signal, and start-up control circuit still includes: the first switching tube Q1 is arranged between the output end of the power supply module and the corresponding input end of the power factor correction module; the power factor correction module is a BOOST power factor correction module (BOOST-PFC module), and includes an energy storage inductor L and a second switching tube Q2 connected in series, a switching device, an input electrode of the switching device is connected to a high-voltage input end of the power factor correction module, an output electrode of the switching device is connected to a low-voltage input end of the power factor correction module, and a controller (not shown in the figure) is respectively connected to a control electrode of the first switching tube Q1 and a control electrode of the second switching tube Q2, the controller controls the second switching tube Q2 to keep an off state, and controls the first switching tube Q1 to continuously perform an on-off operation, so as to implement voltage reduction on a pulsating direct current signal.
In the above embodiment, optionally, the switching device is the first diode D1, the anode of the first diode D1 is determined as the output stage of the switching device, and the cathode of the first diode D1 is determined as the input stage of the switching device.
Specifically, one end (i.e., the negative electrode) of the first diode D1 is connected to the energy storage inductor L, and the other end (i.e., the positive electrode) of the first diode D1 is connected to the second switching tube Q2 (specifically, the emitter); and a controller (not shown in the figure) respectively connected to the control electrode of the first switching tube Q1 and the control electrode of the second switching tube Q2, wherein the controller controls the second switching tube Q2 to keep a cut-off state and controls the first switching tube Q1 to continuously perform an opening and closing action, so as to reduce the voltage of the pulsating direct current signal.
In the above embodiment, optionally, the switching device is a third switching tube, where the third switching tube includes an IGBT-type power tube and a MOSFET, the MOSFET includes a SiC-MOSFET and a GaN-MOSFET, and the third switching tube is turned off or turned on by receiving the control signal.
As a start control circuit with a dc voltage regulation function, in order to realize normal driving, a start module is added on the basis of the above circuit structure, and the start module can configure the first switching tube Q1 to be in a conducting state after the power supply module outputs a dc ripple signal, and the start control circuit specifically includes: the power supply module and the BOOST type power factor correction module (BOOST-PFC module), the power supply module is used for outputting a pulsating direct current signal, the power factor correction module is used for performing power factor correction on the pulsating direct current signal and obtaining a bus direct current signal, and the start control circuit further comprises: the first switching tube Q1 is arranged between the output end of the power supply module and the corresponding input end of the power factor correction module; a first diode D1 disposed between the first switch Q1 and the PFC module, wherein the anode of the first diode D1 is connected to the high-voltage input terminal of the PFC module, and the cathode of the first diode D1 is connected to the low-voltage input terminal of the PFC module; a start-up module (not shown) respectively connected to the control electrode and the input stage of the first switch Q1, the start-up module configures the first switch Q1 to be in a conducting state if the power supply module outputs a pulsating dc signal, so as to supply power to the load through the power factor correction module.
According to the utility model discloses start control circuit, through set up the start module between the input stage at first switch tube Q1, start module is used for when power module opens the power supply, configures first switch tube Q1 into the on-state, on the one hand, can make the start control circuit who has the voltage regulation function normally start, and on the other hand also can guarantee the reliability that the circuit adjusted to the direct voltage.
The starting module can directly control the conduction of the first switch tube Q1, and can also control the conduction of the first switch tube Q1 under the trigger of a pulsating direct current signal output by the power supply module.
The starting module has at least the following three implementation modes.
Example one
As shown in fig. 2, in the above embodiment, optionally, the input stage of the first switching tube Q1 is connected to the high-voltage output terminal of the power supply module, and the output stage of the first switching tube Q1 is connected to the high-voltage input terminal of the power factor correction module; the starting module comprises a bootstrap diode D3, a bootstrap capacitor C2 and a direct-current starting power supply DC1, wherein the anode of the bootstrap diode D3 is connected to the input stage of the first switching tube Q1, the cathode of the bootstrap diode D3 is connected to the anode of the bootstrap capacitor C2, and the cathode of the bootstrap capacitor C2 is connected to the low-voltage output end of the power supply module; the positive electrode of the direct-current starting power supply DC1 is connected to the control electrode of the first switching tube Q1, and the negative electrode of the direct-current starting voltage is connected to the common connection end of the bootstrap diode D3 and the bootstrap capacitor C2.
In this embodiment, as a first implementation manner of the starting module, after the power module outputs a power supply signal, the bootstrap diode D3, the bootstrap capacitor C2, and the direct-current starting power supply DC1 are arranged, the second diode D2 can be controlled to be turned on to charge the bootstrap capacitor C2, after the bootstrap capacitor C2 is charged, the discharge voltage of the bootstrap capacitor C2 and the voltage of the direct-current starting power supply DC1 can be superimposed, so that the voltage difference between two ends of the control electrode of the first switching tube Q1 meets the requirement of turning on the first switching tube Q1, so as to control the turning on of the first switching tube Q1, and by arranging the bootstrap circuit, the voltage boosting between the control electrode of the first switching tube Q1 and the input stage can be realized through capacitor discharge on the premise that the direct-current starting power supply DC1 having a smaller power supply voltage is arranged, so as to turn on the first switching tube Q1.
The starting circuit of the external power supply is provided with a bootstrap diode D3 and a bootstrap capacitor C2 to form a bootstrap circuit, and then an external direct-current starting power supply DC1 is used for closing a first switch tube Q1, so that the starting process of the starting control circuit is completed.
When the start-up is completed, the DC start-up power DC1 may be cut off, and the controller may be used to drive and control the first switching tube Q1.
The bootstrap circuit is adopted to control the conduction of the first switch tube Q1, and the first switch tube Q1 is arranged between the high-voltage output end of the power supply module and the high-voltage input end of the corresponding power factor correction module.
Example two
As shown in fig. 3, in the above embodiment, optionally, the input stage of the first switching tube Q1 is connected to the low-voltage output terminal of the power supply module, and the output stage of the first switching tube Q1 is connected to the low-voltage input terminal of the power factor correction module; the starting module comprises a direct current starting power supply DC3, the positive pole of a direct current starting power supply DC3 is connected to the control pole of the first switching tube Q1, and the negative pole of a direct current starting power supply DC3 is connected to the input stage of the first switching tube Q1.
In this embodiment, as a second implementation manner of the starting module, if the first switch Q1 is disposed between the low voltage output terminal of the power supply module and the low voltage input terminal of the corresponding power factor correction module, a DC starting power supply DC3 meeting the requirement of the first switch Q1 may be directly disposed between the control terminal and the input terminal of the first switch Q1, the negative terminal of the DC starting power supply DC3 is connected to the input terminal of the first switch Q1, and the positive terminal of the DC starting power supply DC3 is connected to the output terminal of the DC switch, so as to form a voltage difference between the two terminals, thereby controlling the conduction of the first switch Q1, and the configuration of the starting module is simpler by only disposing the DC starting power supply DC 3.
When the start-up is completed, the DC start-up power DC3 may be cut off, and the controller may be used to drive and control the first switching tube Q1.
EXAMPLE III
As shown in fig. 4, in the above embodiment, optionally, the input stage of the first switching tube Q1 is connected to the low-voltage output terminal of the power supply module, and the output stage of the first switching tube Q1 is connected to the low-voltage input terminal of the power factor correction module; the starting module comprises a voltage stabilizing capacitor C3, a first voltage dividing resistor R1 and a second voltage dividing resistor R2 which are connected in series, the first voltage dividing resistor R1 is connected to the high-voltage output end of the power supply module, the second voltage dividing resistor R2 is connected to the low-voltage output end of the power supply module, and the voltage stabilizing capacitor C3 and the second voltage dividing resistor R2 are arranged in parallel.
In this embodiment, as a third implementation manner of the starting module, if the first switch tube Q1 is disposed between the low-voltage output end of the power supply module and the low-voltage input end of the corresponding power factor correction module, in addition to the second manner of additionally disposing an external dc starting power supply, it is also possible to dispose and conduct the first switch tube Q1 only by triggering of a pulsating dc signal of the power supply module without disposing an external power supply, specifically, a first voltage dividing resistor R1 and a second voltage dividing resistor R2 are connected in series between the high-voltage output end and the low-voltage output end of the power supply module, a voltage stabilizing capacitor C3 is connected in parallel to two ends of the second voltage dividing resistor R2, a common connection point between the two voltage dividing resistors is connected to the control electrode of the first switch tube Q1, so that after the power supply module outputs a pulsating power supply signal, the voltage stabilizing capacitor C3 is charged, after the voltage stabilizing current charging, the first switch tube Q1 is formed with the second voltage dividing resistor R2, by adopting the trigger starting mode, the energy consumption of the whole starting control circuit can be smaller by controlling the conduction of the first switching tube Q1.
Specifically, the first switch tube Q1 is disposed on the low-voltage side of the current bus, i.e. the low-voltage output end of the power supply module, the first voltage dividing resistor R1, the second voltage dividing resistor R2 and the voltage stabilizing capacitor C3 constitute a voltage dividing type starting circuit, the voltage on the high-voltage side is divided through resistors, the capacitor is driven after voltage stabilization to the first switch tube Q1, so that the circuit is started, and after the starting is completed, the resistor loop can be disconnected to reduce loss.
In any of the above embodiments, optionally, the power factor correction module comprises: the diode comprises a second switching tube Q2, a second diode D2 and a filter capacitor C1, wherein the anode of the second diode D2 is connected to the input stage of the second switching tube Q2, the cathode of the second diode D2 is connected to the anode of the filter capacitor C1, and the cathode of the filter capacitor C1 is connected to the input stage of the second switching tube Q2.
In this embodiment, by controlling the first switch Q1 to be closed, the anode of the first diode D1 is connected to the low-voltage side of the pulsating dc signal, the cathode of the first diode D1 is connected to the high-voltage side of the pulsating dc signal, so that the first diode D1 is turned off, and by inputting a control signal with a second duty ratio to the second switch Q2, a BOOST circuit is formed, and by combining the first switch Q1 and the first diode D1, a UCK-BOOST PFC module is formed, which has both a BOOST function and a buck function, so that the dc bus voltage can be adjusted, boosted or stepped down.
In any of the above embodiments, optionally, the method further includes: and a controller (not shown in the figure) capable of being connected to the control electrode of the first switching tube Q1 and the control electrode of the second switching tube Q2, wherein in the voltage boosting mode, the controller controls the first switching tube Q1 to maintain an on state, and inputs a control signal with a first duty ratio to the second switching tube Q2 to realize voltage boosting of the pulsating direct current signal, and in the voltage reducing mode, the controller controls the second switching tube Q2 to maintain an off state, and inputs a control signal with a second duty ratio to the first switching tube Q1.
In this embodiment, on the basis of providing the power factor correction module with a voltage boosting function, by providing the first switch Q1 and the first diode D1, outputting a corresponding control signal through the controller, before the voltage reduction operation needs to be performed, controlling the second switch Q2 in the power factor correction module to be turned off, at this time, the first switch Q1 is connected in series with the first diode D1 to form a BUCK circuit, and further controlling the first switch Q1 to be turned on and off by inputting a control signal of a first duty ratio to the first switch Q1, so as to have both the voltage boosting function and the voltage reduction function, on one hand, when the power factor correction module is used for supplying power to a small load, the voltage reduction operation is performed, when the power factor correction module is used for supplying power to a large load, the voltage boosting operation is performed, so that the application range of the start control circuit can be increased, and power supply requirements for loads with different power consumptions can be satisfied, on the other hand, when the fluctuation of the pulse direct current signal is large, the voltage fluctuation of a direct current bus for supplying power to a load is reduced by performing voltage reduction operation on the input voltage, so that the normal operation of the starting control circuit is ensured.
In the boosting mode, when the first switch tube Q1 is kept closed, the mode is a boosting circuit mode, the rising of the direct-current bus voltage is realized through the connection and disconnection of the second switch tube Q2, the second switch tube Q2 is connected, the power supply charges the inductor, the capacitor supplies power to the load, the second switch tube Q2 is disconnected, the power supply and the inductor charge the capacitor simultaneously, and the direct-current bus voltage rises.
In any of the above embodiments, optionally, the power factor correction module further includes: and one end of the energy storage inductor L is connected to the cathode of the first diode D1, and the other end of the energy storage inductor L is connected to the anode of the second diode D2, wherein one end of the energy storage inductor L is determined as a high-voltage input end, and the output stage of the second switch tube Q2 is determined as a low-voltage input end.
In any of the above embodiments, optionally, the power factor correction module further includes: one end of the energy storage inductor L is connected to the anode of the first diode D1, and the other end of the energy storage inductor L is connected to the output stage of the second switch tube Q2; one end of the energy storage inductor L is determined as a low-voltage input end, and an input stage pole of the second switching tube Q2 is determined as a low-voltage input end.
In this embodiment, the power factor correction function is realized by the matching arrangement of the filter capacitor C1 and the energy storage inductor L, and the second diode D2 for preventing the energy storage inductor L from being reversely charged by the filter capacitor C1.
Wherein, energy storage inductance L can enough set up in high-voltage bus side, also can set up in low-voltage bus side, combines the different position that sets up of first switch tube Q1, satisfies different design structure's demand.
In any of the above embodiments, optionally, the power supply module includes: the power supply is used for outputting an alternating current power supply signal; and the rectifier is used for converting the alternating current power supply signal into a pulsating direct current signal.
In the embodiment, the power supply module is provided with a rectifier, so that alternating current output from a power supply can be converted into direct current, and the direct current is supplied to a load or an inverter after being filtered, noise interference is eliminated, and voltage is output more stably; on the other hand, the capacitor can be charged through the rectifier, and the use stability of the starting control circuit is further improved.
In any of the above embodiments, optionally, the method further includes: and the inverter is connected with the filter capacitor C1 in parallel and is configured to control the bus direct-current signal to drive the load to operate.
In the embodiment, the inverter converts the direct-current voltage into the alternating-current voltage, provides high-quality alternating current for the load, can drive any kind of load, meets most of power consumption requirements, and enables the application range of the starting control circuit to be wider.
According to the utility model discloses a household electrical appliances, include: the power supply system comprises a load and the start-up control circuit of any one of the above embodiments, wherein the start-up control circuit is connected between a power supply and the load, and the start-up control circuit is configured to control a power supply signal to supply power to the load.
In this embodiment, the home appliance has all the above beneficial effects by setting the start control circuit in any of the above embodiments, and details are not described herein.
In the above embodiments, the home appliance includes at least one of an air conditioner, a refrigerator, a fan, a range hood, a dust collector, and a computer host.
Specifically, the household electrical appliance includes, but is not limited to, one or more of an air conditioner, a refrigerator, a fan, a range hood, a dust collector, and a computer host, and it can be understood that the household electrical appliance may be configured with the structure of the start control circuit provided by the present application to achieve the purpose of controlling power supply to loads with different power consumptions.
In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. A startup control circuit, comprising: the power supply module is used for outputting a pulsating direct current signal, the power factor correction module is used for performing power factor correction on the pulsating direct current signal and obtaining a bus direct current signal, and the start control circuit further comprises:
the first switching tube is arranged between the output end of the power supply module and the corresponding input end of the power factor correction module;
the switching device is arranged between the first switching tube and the power factor correction module, an input electrode of the switching device is connected to a high-voltage input end of the power factor correction module, and an output stage of the switching device is connected to a low-voltage input end of the power factor correction module;
and the starting module is respectively connected to the control electrode and the input stage of the first switching tube, and if the power supply module outputs the pulsating direct current signal, the starting module configures the first switching tube into a conducting state so as to supply power to a load through the power factor correction module.
2. The startup control circuit of claim 1,
the switching device is a first diode, the anode of the first diode is determined as the output stage of the switching device, and the cathode of the first diode is determined as the input electrode of the switching device.
3. The startup control circuit of claim 1,
the switching device is a third switching tube,
the third switching tube comprises an IGBT type power tube and a MOSFET, the MOSFET comprises a SiC-MOSFET and a GaN-MOSFET, and the third switching tube is turned off or turned on by receiving a control signal.
4. The startup control circuit of claim 1,
the input stage of the first switching tube is connected to the high-voltage output end of the power supply module, and the output stage of the first switching tube is connected to the high-voltage input end of the power factor correction module;
the starting module comprises a bootstrap diode, a bootstrap capacitor and a direct current starting power supply,
the anode of the bootstrap diode is connected to the input stage of the first switching tube, the cathode of the bootstrap diode is connected to the anode of the bootstrap capacitor, and the cathode of the bootstrap capacitor is connected to the low-voltage output end of the power supply module;
the positive electrode of the direct-current starting power supply is connected to the control electrode of the first switching tube, and the negative electrode of the direct-current starting voltage is connected to the common connection end of the bootstrap diode and the bootstrap capacitor.
5. The startup control circuit of claim 1,
the input stage of the first switching tube is connected to the low-voltage output end of the power supply module, and the output stage of the first switching tube is connected to the low-voltage input end of the power factor correction module;
the starting module comprises a direct-current starting power supply, the anode of the direct-current starting power supply is connected to the control electrode of the first switching tube, and the cathode of the direct-current starting power supply is connected to the input stage of the first switching tube.
6. The startup control circuit of claim 1,
the input stage of the first switching tube is connected to the low-voltage output end of the power supply module, and the output stage of the first switching tube is connected to the low-voltage input end of the power factor correction module;
the starting module comprises a voltage stabilizing capacitor, a first voltage dividing resistor and a second voltage dividing resistor which are connected in series, the first voltage dividing resistor is connected to the high-voltage output end of the power supply module, the second voltage dividing resistor is connected to the low-voltage output end of the power supply module, and the voltage stabilizing capacitor and the second voltage dividing resistor are arranged in parallel.
7. The start-up control circuit of claim 2, wherein the power factor correction module comprises: a second switch tube, a second diode and a filter capacitor,
the anode of the second diode is connected to the input stage of the second switching tube, the cathode of the second diode is connected to the anode of the filter capacitor, and the cathode of the filter capacitor is connected to the input stage of the second switching tube.
8. The startup control circuit of claim 7, further comprising:
a controller connectable to the control electrode of the first switching tube and the control electrode of the second switching tube,
in the voltage boosting mode, the controller controls the first switch tube to keep a conducting state, and inputs a control signal with a first duty ratio to the second switch tube to realize the voltage boosting of the pulsating direct current signal, and in the voltage reducing mode, the controller controls the second switch tube to keep a cut-off state, and inputs a control signal with a second duty ratio to the first switch tube.
9. The startup control circuit of claim 7, wherein the power factor correction module further comprises:
one end of the energy storage inductor is connected to the cathode of the first diode, the other end of the energy storage inductor is connected to the anode of the second diode,
and determining one end of the energy storage inductor as the high-voltage input end, and determining the output stage of the second switching tube as the low-voltage input end.
10. The startup control circuit of claim 7, wherein the power factor correction module further comprises:
one end of the energy storage inductor is connected to the anode of the first diode, and the other end of the energy storage inductor is connected to the output stage of the second switching tube;
and determining one end of the energy storage inductor as the low-voltage input end, and determining the input stage pole of the second switching tube as the low-voltage input end.
11. The start-up control circuit of any one of claims 1 to 5, wherein the power supply module comprises:
the power supply is used for outputting an alternating current power supply signal;
and the rectifier is used for converting the alternating current power supply signal into the pulsating direct current signal.
12. The startup control circuit of claim 7, further comprising:
the inverter is connected with the filter capacitor in parallel and is configured to control the bus direct-current signal to drive the load to operate.
13. An appliance, comprising:
a load;
the startup control circuit according to any one of claims 1 to 12, interposed between a power source and the load, the startup control circuit being configured to control a supply signal to supply power to the load.
14. The home device of claim 13,
the household appliance comprises at least one of an air conditioner, a refrigerator, a fan, a range hood, a dust collector and a computer host.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921025586.1U CN210111846U (en) | 2019-07-03 | 2019-07-03 | Start control circuit and household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921025586.1U CN210111846U (en) | 2019-07-03 | 2019-07-03 | Start control circuit and household electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210111846U true CN210111846U (en) | 2020-02-21 |
Family
ID=69566260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921025586.1U Active CN210111846U (en) | 2019-07-03 | 2019-07-03 | Start control circuit and household electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210111846U (en) |
-
2019
- 2019-07-03 CN CN201921025586.1U patent/CN210111846U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20120031131A (en) | Power source device | |
| JP2011103761A (en) | Power conversion device | |
| US20120313572A1 (en) | Integrated buck-boost converter of charging apparatus | |
| CN110289771A (en) | Household appliance and its voltage regulator circuit | |
| CN115473435A (en) | Photovoltaic air conditioning system, control method thereof and photovoltaic air conditioner | |
| CN114189007B (en) | Vehicle-mounted charger working mode switching control method and device and vehicle-mounted charger | |
| CN110868058A (en) | Drive control circuit, method and device, air conditioning equipment and readable storage medium | |
| CN111211678A (en) | Adjusting circuit, control method, device, control circuit, household appliance and medium | |
| CN110539611B (en) | Vehicle-mounted outdoor unit control circuit and vehicle-mounted air conditioner | |
| CN111200370A (en) | Adjusting circuit, control method, device, control circuit, household appliance and medium | |
| CN210111846U (en) | Start control circuit and household electrical appliance | |
| CN112928928A (en) | Intelligent adjustment output power supply chip and power supply circuit with same | |
| CN111371376A (en) | Adjusting circuit, control method, device, control circuit, household appliance and medium | |
| CN111355421B (en) | Drive control circuit, drive control method, circuit board and air conditioner | |
| CN111262459A (en) | Adjusting circuit, control method, device, control circuit, household appliance and medium | |
| CN110676910B (en) | Power supply device of vehicle-mounted air conditioner and vehicle-mounted air conditioner | |
| CN209748405U (en) | Household electrical appliance and passive power factor correction circuit thereof | |
| CN211606385U (en) | Voltage regulating circuit, drive control circuit and household electrical appliance | |
| CN111149275B (en) | Power storage device | |
| CN211701879U (en) | Voltage regulating circuit, drive control circuit and household electrical appliance | |
| CN111355376A (en) | Buck-Boost switching circuit, control method and charger | |
| CN110707920A (en) | Drive control circuit, method and device, air conditioning equipment and readable storage medium | |
| CN211630094U (en) | Buck-boost driving circuit and air conditioner | |
| CN218449861U (en) | Boost control circuit and frequency conversion refrigerator driving circuit | |
| CN210680342U (en) | Power supply device of vehicle-mounted air conditioner and vehicle-mounted air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |