CN214101188U

CN214101188U - Power supply circuit, drive control circuit, circuit board, electronic circuit and air conditioner

Info

Publication number: CN214101188U
Application number: CN202022829390.7U
Authority: CN
Inventors: 付兆强; 霍军亚; 梁国强; 王明明; 张海春
Original assignee: GD Midea Air Conditioning Equipment Co Ltd; Foshan Shunde Midea Electric Science and Technology Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd; Foshan Shunde Midea Electric Science and Technology Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-08-31
Anticipated expiration: 2030-11-30

Abstract

The utility model provides a power supply circuit, a drive control circuit, a circuit board, an electronic circuit and an air conditioner, which comprises an inversion module and a conversion module, wherein the inversion module is provided with a direct current input end and an alternating current output end, and the alternating current output end is used for being connected to a motor; the conversion module is used for converting alternating current signals into direct current signals, the conversion module is provided with an alternating current input end and a direct current output end, the alternating current input end is used for obtaining alternating current signals from an alternating current power supply, the direct current output end is used for outputting direct current signals to the direct current input end, and the voltage value of the direct current signals is smaller than that of the alternating current signals. The utility model discloses can obtain the low DC voltage after the rectification as the input voltage of contravariant module, can satisfy the application scenario of miniwatt direct current fan to the motor need not to be extra insulation processing, factor of safety is high, insulating cost reduces, and in addition, the contravariant module need not to use high-power high-pressure driven intelligent power module, and the circuit is with low costs, factor of safety is high.

Description

Power supply circuit, drive control circuit, circuit board, electronic circuit and air conditioner

Technical Field

The utility model relates to an air conditioner technical field especially relates to a supply circuit, drive control circuit, circuit board, electronic circuit and air conditioner.

Background

The external scheme of the driving Board of the air conditioner motor is that a motor driving Circuit and an air conditioner control Circuit are integrated into one PCB (Printed Circuit Board), and the motor driving mainly uses a bus voltage after alternating current input rectification, and the rotation speed control is realized by using a high-voltage IPM (Intelligent Power Module) or a discrete Gate Bipolar Transistor (Insulated Gate Bipolar Transistor) and the like as Power devices. However, for the application of the low-power dc motor such as the dc fan, if the above scheme for externally arranging the driving board is adopted, the rectified high dc voltage is used as the power supply for inversion, so the dc motor needs to be specially processed, the requirement for the insulation level is high, and the IPM driven by the high power and the high voltage is high in cost.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a supply circuit, drive control circuit, circuit board, electronic circuit and air conditioner need not to do insulating processing, circuit cost low to the motor.

According to the utility model discloses a supply circuit of first aspect embodiment includes:

the inverter module is provided with a direct current input end and an alternating current output end, and the alternating current output end is used for being connected to the motor;

the conversion module is used for converting an alternating current signal into a direct current signal, and is provided with an alternating current input end and a direct current output end, wherein the alternating current input end is used for acquiring the alternating current signal from an alternating current power supply, and the direct current output end is used for outputting the direct current signal to the direct current input end, and the voltage value of the direct current signal is smaller than that of the alternating current signal.

According to the utility model discloses supply circuit has following beneficial effect at least: the embodiment of the utility model provides a be provided with conversion module and contravariant module, wherein, conversion module can acquire the alternating current signal who comes from alternating current power supply through AC input end, then with the alternating current signal conversion for the lower DC signal of voltage after, export the DC signal to DC input end from DC output. Therefore, the embodiment of the utility model provides a can obtain the low DC voltage after the rectification as the input voltage of contravariant module to can satisfy miniwatt direct current fan's application scenario, and the motor need not to do extra insulation treatment, factor of safety is high, insulating cost reduction, and in addition, the contravariant module need not to use high-power high-pressure driven intelligent power module, and the circuit is with low costs, factor of safety is high.

According to some embodiments of the present invention, the conversion module includes a first rectification module and a first voltage transformation module, the ac input end loops through the first rectification module and the first voltage transformation module is connected to the dc output end.

According to some embodiments of the present invention, the conversion module further comprises a first filtering module, the first filtering module is disposed between the first rectifying module and the first transforming module.

According to some embodiments of the invention, the first voltage transformation module is an isolation transformer.

According to some embodiments of the invention, the first filtering module is a direct current filtering module.

According to some embodiments of the present invention, the conversion module includes a second rectification module and a second voltage transformation module, the ac input end loops through the second voltage transformation module and the second rectification module is connected to the dc output end.

According to some embodiments of the invention, the second voltage transformation module is an isolation transformer.

According to the utility model discloses a some embodiments still include second filtering module, second filtering module's one end is connected to alternating current input end, the other end is used for being connected to alternating current power supply.

According to some embodiments of the invention, the second filtering module is an ac filtering module.

According to the utility model discloses a some embodiments still include third filtering module, third filtering module's one end is connected to direct current output end, the other end is connected to direct current input end.

According to some embodiments of the invention, the third filtering module is a dc filtering module.

According to some embodiments of the invention, the voltage value of the direct current signal is less than or equal to 36V.

According to the utility model discloses a drive control circuit of second aspect embodiment, including control module and the above-mentioned first aspect supply circuit, control module is connected to the contravariant module.

According to the utility model discloses drive control circuit has following beneficial effect at least: the embodiment of the utility model provides a be provided with conversion module and contravariant module, wherein, conversion module can acquire the alternating current signal who comes from alternating current power supply through AC input end, then with the alternating current signal conversion for the lower DC signal of voltage after, export the DC signal to DC input end from DC output. Therefore, the embodiment of the utility model provides a can obtain the low DC voltage after the rectification as the input voltage of contravariant module to can satisfy miniwatt direct current fan's application scenario, and the motor need not to do extra insulation treatment, factor of safety is high, insulating cost reduction, and in addition, the contravariant module need not to use high-power high-pressure driven intelligent power module, and the circuit is with low costs, factor of safety is high.

According to some embodiments of the invention, the motor is a first load, the control module is provided with a first port and a second port, the first port is connected to the inverter module, the second port is used for being connected to a second load.

According to the utility model discloses a circuit board of third aspect embodiment, including supply circuit of above-mentioned first aspect or the drive control circuit of above-mentioned second aspect.

According to the utility model discloses circuit board has following beneficial effect at least: the embodiment of the utility model provides a be provided with conversion module and contravariant module, wherein, conversion module can acquire the alternating current signal who comes from alternating current power supply through AC input end, then with the alternating current signal conversion for the lower DC signal of voltage after, export the DC signal to DC input end from DC output. Therefore, the embodiment of the utility model provides a can obtain the low DC voltage after the rectification as the input voltage of contravariant module to can satisfy miniwatt direct current fan's application scenario, and the motor need not to do extra insulation treatment, factor of safety is high, insulating cost reduction, and in addition, the contravariant module need not to use high-power high-pressure driven intelligent power module, and the circuit is with low costs, factor of safety is high.

According to the utility model discloses an electronic circuit of fourth aspect embodiment, including motor and the above-mentioned third aspect the circuit board, the motor is connected to the alternating current output.

According to the utility model discloses electronic circuit has following beneficial effect at least: the embodiment of the utility model provides a be provided with conversion module and contravariant module, wherein, conversion module can acquire the alternating current signal who comes from alternating current power supply through AC input end, then with the alternating current signal conversion for the lower DC signal of voltage after, export the DC signal to DC input end from DC output. Therefore, the embodiment of the utility model provides a can obtain the low DC voltage after the rectification as the input voltage of contravariant module to can satisfy miniwatt direct current fan's application scenario, and the motor need not to do extra insulation treatment, factor of safety is high, insulating cost reduction, and in addition, the contravariant module need not to use high-power high-pressure driven intelligent power module, and the circuit is with low costs, factor of safety is high.

According to some embodiments of the utility model, the circuit board sets up the motor is outside.

An air conditioner according to an embodiment of the fifth aspect of the present invention includes the electronic circuit of the fourth aspect.

According to the utility model discloses air conditioner has following beneficial effect at least: the embodiment of the utility model provides a be provided with conversion module and contravariant module, wherein, conversion module can acquire the alternating current signal who comes from alternating current power supply through AC input end, then with the alternating current signal conversion for the lower DC signal of voltage after, export the DC signal to DC input end from DC output. Therefore, the embodiment of the utility model provides a can obtain the low DC voltage after the rectification as the input voltage of contravariant module to can satisfy the application scenario of the miniwatt direct current fan of indoor set, and the motor need not to do extra insulation treatment, factor of safety is high, insulating cost reduction, and in addition, the contravariant module need not to use high-power high-pressure driven intelligent power module, and circuit cost is low, factor of safety is high.

According to some embodiments of the utility model, the motor is fan direct current motor.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, 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 is a circuit topology diagram of a power supply circuit according to an embodiment of the present invention;

fig. 2 is a circuit topology diagram of a power supply circuit according to another embodiment of the present invention;

fig. 3 is a circuit topology diagram of a power supply circuit according to another embodiment of the present invention;

fig. 4 is a schematic diagram of a connection relationship of the control module according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the related art, because the air conditioner indoor unit has a high noise requirement, the original ac motor is often replaced by a brushless dc motor with a built-in feedback. The feedback-built brushless direct current motor is characterized in that a PCB, a chip, a power device and the like required by control and driving are combined and then placed in the motor, and the motor has high cost, limited internal space and difficult heat dissipation, so that the motor has high failure rate in actual use.

In order to solve the above problems, the current means is to externally arrange a driving board, and combine a motor driving circuit and an air conditioner control circuit into a PCB, however, for the current driving board external scheme, the high-power motor driving of the air conditioner mainly uses a bus voltage after alternating current input rectification, and realizes rotation speed control by using a high-voltage IPM or a discrete IGBT as a power device.

For the application occasions of the low-power direct current motor, namely a direct current fan in an indoor unit of an air conditioner, if the brushless direct current motor with the built-in feedback is adopted, the cost is high and the failure rate is high. If the scheme for externally arranging the drive plate is adopted, the rectified high direct-current voltage is used as a power supply source for inversion, so that the direct-current motor needs to be specially processed, the requirement on the insulation grade is high, and the IPM driven by high power and high voltage is high in cost.

Based on the above situation, an embodiment of the present invention provides a power supply circuit, a driving control circuit, a circuit board, an electronic circuit and an air conditioner, wherein the power supply circuit includes, but is not limited to, an inverter module and a conversion module, the inverter module is provided with a dc input end and an ac output end, and the ac output end is used for being connected to a motor; the conversion module is used for converting alternating current signals into direct current signals, the conversion module is provided with an alternating current input end and a direct current output end, the alternating current input end is used for obtaining alternating current signals from an alternating current power supply, the direct current output end is used for outputting direct current signals to the direct current input end, and the voltage value of the direct current signals is smaller than that of the alternating current signals. According to the utility model discloses technical scheme, conversion module can acquire the alternating current signal who comes from alternating current power supply through AC input end, then with the alternating current signal conversion for the lower DC signal of voltage after, export the DC signal to DC input end from DC output. Therefore, the embodiment of the utility model provides a can obtain the low DC voltage after the rectification as the input voltage of contravariant module to can satisfy miniwatt direct current fan's application scenario, and the motor need not to do extra insulation treatment, factor of safety is high, insulating cost reduction, and in addition, the contravariant module need not to use high-power high-pressure driven intelligent power module, and the circuit is with low costs, factor of safety is high.

The embodiments of the present invention will be further explained with reference to the drawings.

As shown in fig. 1, fig. 1 is a schematic diagram of a power supply circuit according to some embodiments of the present invention.

Specifically, the power supply circuit of the embodiment of the present invention includes a conversion module 200 and an inverter module 300, wherein the inverter module 300 is provided with a dc input end and an ac output end, and the ac output end is used for connecting to the motor 400; the conversion module 200 is configured to convert an ac signal into a dc signal, and the conversion module 200 is provided with an ac input end and a dc output end, where the ac input end is configured to obtain an ac signal from the ac power supply 100, and the dc output end is configured to output a dc signal to the dc input end, where a voltage value of the dc signal is smaller than a voltage value of the ac signal.

According to the embodiment of the utility model discloses technical scheme, alternating current power supply 100 in fig. 1 can export highly compressed alternating current signal to conversion module 200, then conversion module 200 can acquire foretell high-pressure alternating current signal through AC input end, and carry out rectification processing and vary voltage processing to foretell high-pressure alternating current signal, thereby obtain the direct current signal of low pressure, and export low pressure direct current signal to contravariant module 300 from DC output end, contravariant module 300 can receive foretell low pressure direct current signal through DC input end, and carry out contravariant processing to foretell low pressure direct current signal, thereby obtain the alternating current signal of low pressure, and carry low pressure alternating current signal to motor 400 through AC output end.

Therefore, the embodiment of the present invention can convert the high voltage ac signal of the ac power supply 100 to obtain the low voltage dc signal, and use the low voltage dc signal as the input voltage of the inverter module 300, so as to satisfy the application of the low power dc fan, and the motor 400 does not need to be additionally insulated, so that the safety factor is high, and the insulation cost is reduced; additionally, the utility model discloses contravariant module need not to use high-power high-pressure driven intelligent power module, has reduced circuit cost, factor of safety is high.

It is understood that, with regard to the ac power supply 100 described above, the ac signal output therefrom is a high voltage ac signal. The ac power supply 100 may be a commercial power supply, which has a rated voltage of 220V and an operating frequency of 50 HZ.

In addition, it is understood that the voltage values of the direct current electric signal and the alternating current electric signal may be voltage effective values.

Note that the motor 400 is a low-voltage motor, specifically, a motor having an input voltage of not higher than 36V. The utility model discloses low voltage motor is different from high voltage motor, and wherein, high voltage motor indicates to use direct current bus voltage as input voltage, and input voltage is more than 100V usually.

Note that the motor 400 may be a motor in an indoor unit fan of an air conditioner. The power supply circuit of the embodiment of the utility model can be arranged in an indoor unit; or the fan is arranged in the outdoor unit and is connected to the indoor unit fan through a lead.

It is worth noting that the power supply circuit provided by the embodiment of the present invention can adopt a scheme of external drive plate, that is, the power supply circuit provided by the embodiment of the present invention is disposed outside the motor 400, rather than being installed inside the motor 400, thereby not only reducing the cost and the failure rate, but also avoiding additional insulation processing for the motor 400, having high safety factor and reduced insulation cost; additionally, the utility model discloses contravariant module need not to use high-power high-pressure driven intelligent power module, has reduced circuit cost, factor of safety is high.

Note that, regarding the rectification process and the transformation process in the conversion module 200, the rectification process may be performed first and then the transformation process may be performed, as shown in fig. 2; alternatively, the transformation process may be performed first and then the rectification process may be performed, as shown in fig. 3.

As shown in fig. 2, fig. 2 is a schematic diagram of a power supply circuit according to another embodiment of the present invention.

Specifically, regarding the conversion module 200 in fig. 1, it may include, but is not limited to, a first rectification module 210 and a first transformation module 230 as in fig. 2, wherein the ac input terminal is connected to the dc output terminal through the first rectification module 210 and the first transformation module 230 in sequence.

According to the utility model discloses technical scheme, first rectifier module 210 can acquire the high-voltage alternating current signal that comes from alternating current power supply 100 through AC input end, and rectify this high-voltage alternating current signal, in order to obtain the high-voltage direct current signal after the rectification, and carry this high-voltage direct current signal to first vary voltage module 230, first vary voltage module 230 can carry out the step-down processing to this high-voltage direct current signal after that, in order to obtain the low pressure direct current signal after stepping down, and carry this low pressure direct current signal to contravariant module 300, contravariant module 300 can receive foretell low pressure direct current signal through DC input end after that, and carry out contravariant processing to foretell low pressure direct current signal, thereby obtain low pressure alternating current signal, and carry low pressure alternating current signal to motor 400 through AC output end.

It is understood that, regarding the first rectifying module 210, it may be a bridge rectifying circuit; regarding the first transforming module 230, it may be an isolation transformer, wherein a primary winding of the isolation transformer is used for receiving the high-voltage dc signal and a secondary winding is used for outputting the low-voltage dc signal.

It should be noted that, when the first transforming module 230 is an isolation transformer, the first transforming module 230 may be used as a switching power supply.

In addition, as shown in fig. 2, the conversion module 200 in the power supply circuit of the embodiment of the present invention further includes but is not limited to a first filtering module 220, wherein the first filtering module 220 is disposed between the first rectifying module 210 and the first transforming module 230.

Specifically, after the first rectifying module 210 rectifies the high-voltage dc electrical signal, the first filtering module 220 filters the high-voltage dc electrical signal to obtain a high-voltage dc electrical signal with a more stable waveform, and outputs the high-voltage dc electrical signal to the first transforming module 230.

It is understood that the first filtering module 220 may be a dc filtering module.

In addition, as shown in fig. 2, the power supply circuit of the embodiment of the present invention further includes but is not limited to a second filtering module 500, wherein one end of the second filtering module 500 is connected to the ac input end of the converting module 200, and the other end is used for being connected to the ac power supply 100.

Specifically, one end of the second filtering module 500 obtains the high-voltage ac signal output by the ac power supply 100, and performs filtering processing on the high-voltage ac signal, so as to obtain a high-voltage ac signal with a smoother waveform, and output the high-voltage ac signal to the first rectifying module 210.

It is understood that the second filtering module 500 may be an ac filtering module.

In addition, as shown in fig. 2, the power supply circuit of the embodiment of the present invention further includes but is not limited to a third filtering module 600, wherein one end of the third filtering module 600 is connected to the dc output end of the converting module 200, and the other end is connected to the dc input end of the inverting module 300.

Specifically, one end of the third filtering module 600 obtains the low-voltage dc signal output by the first transforming module 230, and filters the low-voltage dc signal, so as to obtain a low-voltage dc signal with a more stable waveform, and outputs the low-voltage dc signal to the inverting module 300.

It is understood that the third filtering module 600 may be a dc filtering module.

Based on the above technical solution of each embodiment in fig. 2, the utility model discloses the supply circuit of embodiment includes but is not limited to under the circumstances that there are second filtering module 500, first rectification module 210, first filtering module 220, first vary voltage module 230, third filtering module 600 and contravariant module 300, ac power supply 100 can export high-voltage ac signal to second filtering module 500, then second filtering module 500 can carry out filtering process to this high-voltage ac signal to obtain the more smooth high-voltage ac signal of waveform, and export to first rectification module 210; then, the first rectifying module 210 rectifies the filtered high-voltage ac electrical signal to obtain a rectified high-voltage dc electrical signal, and transmits the rectified high-voltage dc electrical signal to the first filtering module 220; then, the first filtering module 220 performs filtering processing on the high-voltage direct-current electrical signal, so as to obtain a high-voltage direct-current electrical signal with a more stable waveform, and outputs the high-voltage direct-current electrical signal to the first transforming module 230; then, the first voltage transformation module 230 can perform voltage reduction processing on the filtered high-voltage direct-current electrical signal to obtain a reduced low-voltage direct-current electrical signal, and transmit the low-voltage direct-current electrical signal to the third filtering module 600; then, the third filtering module 600 performs filtering processing on the low-voltage dc signal, so as to obtain a low-voltage dc signal with a more stable waveform, and outputs the low-voltage dc signal to the inverting module 300; the inverter module 300 then inverts the filtered low-voltage dc signal to obtain a low-voltage ac signal, and transmits the low-voltage ac signal to the motor 400 through the ac output terminal.

As shown in fig. 3, fig. 3 is a schematic diagram of a power supply circuit according to another embodiment of the present invention.

Specifically, regarding the conversion module 200 in fig. 1, there may be included, but not limited to, a second transformation module 240 and a second rectification module 250 as in fig. 3, wherein the ac input terminal is connected to the dc output terminal through the second transformation module 240 and the second rectification module 250 in sequence.

According to the utility model discloses technical scheme, second vary voltage module 240 can acquire the high-voltage alternating current signal that comes from alternating current power supply 100 through AC input end, and carry out the step-down processing to this high-voltage alternating current signal, and the low pressure alternating current signal with the frequency after obtaining the step-down, and carry this low pressure alternating current signal to second rectifier module 250, second rectifier module 250 can carry out the rectification to this low pressure alternating current signal and handle, in order to obtain the low pressure direct current signal after the rectification, and carry this low pressure direct current signal to contravariant module 300, contravariant module 300 can receive foretell low pressure direct current signal through DC input end after that, and carry out contravariant processing to foretell low pressure direct current signal, thereby obtain the alternating current signal of low pressure, and carry low pressure alternating current signal to motor 400 through AC output end.

It is understood that, regarding the second rectifying module 250, it may be a bridge rectifying circuit; the second transforming module 240 may be an isolation transformer, wherein a primary winding of the isolation transformer is used for receiving the high-voltage ac signal, and a secondary winding of the isolation transformer is used for outputting the low-voltage ac signal.

It should be noted that, when the second transforming module 240 is an isolation transformer, the second transforming module 240 may be used as a linear power source.

In addition, as shown in fig. 3, the power supply circuit of the embodiment of the present invention further includes but is not limited to a second filtering module 500, wherein one end of the second filtering module 500 is connected to the ac input end of the converting module 200, and the other end is used for being connected to the ac power supply 100.

Specifically, one end of the second filtering module 500 obtains the high-voltage ac signal output by the ac power supply 100, and performs filtering processing on the high-voltage ac signal, so as to obtain a high-voltage ac signal with a smoother waveform, and output the high-voltage ac signal to the second transforming module 240.

In addition, as shown in fig. 3, the power supply circuit of the embodiment of the present invention further includes but is not limited to a third filtering module 600, wherein one end of the third filtering module 600 is connected to the dc output end of the converting module 200, and the other end is connected to the dc input end of the inverting module 300.

Specifically, one end of the third filtering module 600 obtains the low-voltage dc signal output by the second rectifying module 250, and performs filtering processing on the low-voltage dc signal, so as to obtain a low-voltage dc signal with a more stable waveform, and output the low-voltage dc signal to the inverting module 300.

Based on the above technical solution of each embodiment in fig. 3, the utility model discloses under the condition that the supply circuit of embodiment includes but not limited to second filtering module 500, second voltage transformation module 240, second rectification module 250, third filtering module 600 and contravariant module 300, ac power supply 100 can output high-voltage ac signal to second filtering module 500, then second filtering module 500 can carry out filtering processing to this high-voltage ac signal, thereby obtain the high-voltage ac signal with smoother waveform, and output to second voltage transformation module 240; then, the second voltage transformation module 240 can perform voltage reduction processing on the high-voltage alternating current signal to obtain a reduced low-voltage alternating current signal with the same frequency, and transmit the low-voltage alternating current signal to the second rectification module 250; then, the second rectifying module 250 can rectify the low-voltage ac electrical signal to obtain a rectified low-voltage dc electrical signal, and transmit the low-voltage dc electrical signal to the third filtering module 600; then, the third filtering module 600 performs filtering processing on the low-voltage dc signal, so as to obtain a low-voltage dc signal with a more stable waveform, and outputs the low-voltage dc signal to the inverting module 300; the inverter module 300 then inverts the filtered low-voltage dc signal to obtain a low-voltage ac signal, and transmits the low-voltage ac signal to the motor 400 through the ac output terminal.

In addition, it is noted that the inverter module 300 is capable of receiving a low-voltage dc signal, generating a low-voltage ac signal by adjusting six MOS transistors, and transmitting the low-voltage ac signal to the motor 400 through a three-phase ac output terminal.

It should be noted that, for the inverter module 300 in the embodiment of the present invention, a discrete device may be used, and an integrated module may also be used.

Based on the above power supply circuit, the following provides various embodiments of the driving control circuit of the present invention.

The driving control circuit of the embodiment of the present invention includes but is not limited to the control module 700 and the power supply circuit of any of the above embodiments, wherein the control module 700 is connected to the inverter module 300.

Because the utility model discloses the drive control circuit of embodiment is including the supply circuit of above-mentioned arbitrary embodiment, consequently, the utility model discloses the concrete implementation and the technological effect of drive control circuit can refer to the concrete implementation and the technological effect of the supply circuit of above-mentioned arbitrary embodiment.

It is to be noted that, regarding the control module 700, in the related art, there are two common external electric control schemes, the first scheme is to adopt a master control hot ground scheme without isolation; the second is to separately control the power device and the otherwise weak electrical load with a dual chip. For the first scheme, the reliability is low, and safety protection needs to be done on the structure; for the second scheme, a single driving MCU is used for controlling the motor and the other single MCU is used for air conditioner logic control in consideration of safety insulation, so that the cost of the chip scheme is high.

To the above situation, because the embodiment of the utility model provides an in the conversion module 200 can convert high-voltage alternating current signal to low-voltage direct current signal and carry to contravariant module 300, the input voltage level of contravariant module 300 is lower, therefore, the utility model discloses need not to adopt above-mentioned two kinds of automatically controlled schemes, the reliability is higher to can adopt single chip to control, the chip is with low costs.

As shown in fig. 4, fig. 4 is a schematic connection diagram of a control module 700 according to an embodiment of the present invention. The control module 700 is provided with a first port connected to the inverter module 300 in a first load and a second port for connection to a second load. The first load is a dc motor 800, the dc motor 800 includes the inverter module 300 and the motor 400, and the second load includes, but is not limited to, other weak electric loads, and for example, the second load may be a load such as the sensor 910, the stepping motor 920, or the display 930 shown in fig. 4.

Based on the above power supply circuit and the driving control circuit, the following provides various embodiments of the circuit board of the present invention.

The circuit board of the embodiment of the present invention includes but is not limited to the power supply circuit of any of the above embodiments or the drive control circuit of any of the above embodiments.

Because the utility model discloses the circuit board of embodiment is including the supply circuit of any above-mentioned embodiment or the drive control circuit of any above-mentioned embodiment, consequently, the utility model discloses a concrete implementation and the technological effect of circuit board can refer to the supply circuit of any above-mentioned embodiment or the concrete implementation and the technological effect of the drive control circuit of any above-mentioned embodiment.

Based on the above-mentioned circuit board, the following provides various embodiments of the electronic circuit of the present invention.

The utility model discloses electronic circuit includes the circuit board of motor and above-mentioned embodiment, and the motor is connected to the alternating current output of contravariant module.

Because the electronic circuit of the embodiment of the present invention includes the circuit board of the above-mentioned embodiment, and the circuit board of the above-mentioned embodiment includes the power supply circuit of any above-mentioned embodiment or the drive control circuit of any above-mentioned embodiment, therefore, the specific implementation and technical effect of the electronic circuit of the embodiment of the present invention can refer to the specific implementation and technical effect of the power supply circuit of any above-mentioned embodiment or the drive control circuit of any above-mentioned embodiment.

In addition, it is noted that the wiring board is provided outside the motor. The circuit board provided by the embodiment of the utility model is arranged outside the motor instead of being arranged inside the motor, thereby not only reducing the cost and the failure rate, but also avoiding extra insulation treatment on the motor, having high safety factor and reduced insulation cost; additionally, the utility model discloses contravariant module need not to use high-power high-pressure driven intelligent power module, has reduced circuit cost, factor of safety is high.

Based on the above electronic circuit, the following provides various embodiments of the air conditioner of the present invention.

The air conditioner of the embodiment of the present invention includes, but is not limited to, the electronic circuit of any of the above embodiments.

Because the air conditioner of the embodiment of the present invention includes the electronic circuit of any one of the above embodiments, and the electronic circuit of any one of the above embodiments includes the circuit board of the above embodiment, and the circuit board of the above embodiment includes the power supply circuit of any one of the above embodiments or the driving control circuit of any one of the above embodiments, therefore, the specific implementation and technical effect of the air conditioner of the embodiment of the present invention can refer to the specific implementation and technical effect of the power supply circuit of any one of the above embodiments or the driving control circuit of any one of the above embodiments.

It can be understood that, regarding the above-mentioned motor, it is a motor of an indoor unit fan, wherein the motor is a fan direct current motor.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims

1. A power supply circuit, comprising:

the conversion module is provided with an alternating current input end and a direct current output end, the alternating current input end is used for obtaining the alternating current signal from an alternating current power supply, the direct current output end is used for outputting the direct current signal to the direct current input end, and the voltage value of the direct current signal is smaller than that of the alternating current signal;

the conversion module comprises a second rectification module and a second voltage transformation module, and the alternating current input end is connected to the direct current output end sequentially through the second voltage transformation module and the second rectification module.

2. The power supply circuit of claim 1, wherein the second transforming module is an isolation transformer.

3. The power supply circuit according to claim 1 or 2, further comprising a second filter module, wherein one end of the second filter module is connected to the ac input end, and the other end of the second filter module is used for connecting to an ac power source.

4. The power supply circuit of claim 3, wherein the second filtering module is an AC filtering module.

5. The power supply circuit according to claim 1 or 2, further comprising a third filtering module, wherein one end of the third filtering module is connected to the dc output terminal, and the other end of the third filtering module is connected to the dc input terminal.

6. The power supply circuit of claim 5, wherein the third filtering module is a DC filtering module.

7. The power supply circuit according to claim 1 or 2, wherein a voltage value of the direct current signal is less than or equal to 36V.

8. A drive control circuit comprising a control module and a power supply circuit as claimed in any one of claims 1 to 7, the control module being connected to the inverter module.

9. The drive control circuit according to claim 8, wherein the motor is a first load, the control module is provided with a first port and a second port, the first port is connected to the inverter module, and the second port is for connection to a second load.

10. A circuit board comprising the power supply circuit of any one of claims 1 to 7 or the drive control circuit of claim 8 or 9.

11. An electronic circuit comprising a motor and the wiring board of claim 10, wherein the motor is connected to the ac output terminal.

12. The electronic circuit of claim 11, wherein the circuit board is disposed outside the motor.

13. An air conditioner characterized by comprising the electronic circuit of claim 11 or 12.

14. The air conditioner of claim 13, wherein the motor is a fan dc motor.