CN219329694U - Silicon controlled chopper power regulating circuit capable of conducting EMC and equipment - Google Patents
Silicon controlled chopper power regulating circuit capable of conducting EMC and equipment Download PDFInfo
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- CN219329694U CN219329694U CN202223610168.3U CN202223610168U CN219329694U CN 219329694 U CN219329694 U CN 219329694U CN 202223610168 U CN202223610168 U CN 202223610168U CN 219329694 U CN219329694 U CN 219329694U
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- 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
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Abstract
The utility model discloses a silicon controlled chopper power regulating circuit and equipment capable of passing EMC conduction, wherein the power regulating circuit comprises: the power supply comprises an interference elimination module, an EMC filter module, a control switch module and a silicon controlled rectifier driving module, wherein the interference elimination module is connected between a live wire and a zero wire and used for inhibiting the external conduction of EMC interference signals contained in a switching power supply on the power wire, the EMC filter module is connected with the interference elimination module and used for inhibiting abrupt change interference signals generated by load chopper caused by silicon controlled rectifier so that signals transmitted on the power wire can meet the requirements of EMC conduction standards, the control switch module is connected with the interference elimination module and used for controlling the on and off of the zero wire and the EMC filter module according to control signals sent by a controller, and the silicon controlled rectifier driving module is connected with the controller and the EMC filter module and used for working according to the control signals so as to regulate the output power of the load. According to the utility model, under the condition of passing EMC conduction test, the output power can be regulated by adopting a silicon controlled chopper mode.
Description
Technical Field
The utility model relates to the technical field of EMC conduction, in particular to a silicon controlled chopper power regulating circuit and device capable of conducting EMC.
Background
In household appliances, there are currently relevant EMC mandatory requirements, wherein there is a requirement that the conduction test of the product must meet the relevant standards. The method for regulating output power and rotating speed of the household appliance by adopting the silicon controlled chopper mode has the advantages of stable output of the whole machine power, quick response and convenient measurement, and is also convenient for accurately controlling by adopting a PID algorithm, but because the silicon controlled chopper mode outputs a non-standard sine wave to a load and has waveform mutation, the method is difficult to pass EMC conduction test, and is applicable to both motor products and heating products, thereby directly limiting the actual use of the silicon controlled chopper power regulating mode on the household appliance products, and realizing the silicon controlled chopper power regulating technology capable of meeting relevant EMC conduction test standards in the electric appliance products is the problem to be solved urgently at present.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the silicon controlled chopper power regulating circuit capable of passing EMC conduction, and the output power can be regulated by adopting a silicon controlled chopper mode under the condition of passing EMC conduction test.
The utility model also provides power regulating equipment based on the silicon controlled chopper.
In a first aspect, an embodiment of the present utility model provides a thyristor chopper power regulating circuit that is EMC conductive, comprising:
the interference elimination module is connected between the live wire and the zero wire and used for inhibiting external conduction of EMC interference signals contained in the switching power supply on the power wire;
the control switch module is connected with the interference elimination module and is used for controlling the connection and disconnection of the zero line and the EMC filtering module according to a control signal sent by the controller;
the EMC filter module is connected with the control switch module and is used for inhibiting abrupt interference signals generated by loads due to chopper of the silicon controlled rectifier so that signals transmitted on the power line can meet the requirements of EMC conduction standards;
the controllable silicon driving module is connected with the controller at one end and the EMC filtering module at the other end, and is used for working according to a control signal sent by the controller so as to adjust the output power of a load
The silicon controlled chopper power regulating circuit capable of passing EMC conduction has at least the following beneficial effects: the interference elimination module receives input signals of the zero line and the fire wire, can restrain the output of residual interference signals of the switching power supply on the zero line and the fire wire, and the EMC filter module is specially used for restraining abrupt interference signals generated by load chopper caused by the silicon controlled rectifier, so that signals transmitted on the power wire can meet the requirements of EMC conduction standards. The control switch module is controlled to be conducted according to a control signal sent by the controller so as to enable the EMC filter module, the load and the silicon controlled rectifier driving module to be connected with an alternating current power supply to work, and the EMC filter module, the load and the silicon controlled rectifier driving module are cut off from being connected with the alternating current power supply when in a standby state or a shutdown state so as to reduce standby power consumption. The controllable silicon driving module works according to the control signal sent by the controller to output control pulse to adjust the output power of the load, and the controllable silicon chopping mode can be adopted to adjust the output power under the condition of passing EMC conduction test.
According to further embodiments of the present utility model, a thyristor chopper power regulator circuit with EMC conduction, the interference cancellation module includes:
one end of the first capacitor is connected with the live wire, and the other end of the first capacitor is connected with the zero line;
and one end of the first resistor is connected with the live wire, and the other end of the first resistor is connected with the zero line.
According to further embodiments of the present utility model, a thyristor chopper power regulator circuit with EMC conduction, the EMC filter module includes:
one end of the second capacitor is connected with the live wire, and the other end of the second capacitor is connected with the zero line;
one end of the third resistor is connected with the live wire, and the other end of the third resistor is connected with the zero line;
the common mode inductor comprises a first connecting pin, a second connecting pin, a third connecting pin and a fourth connecting pin, wherein the second connecting pin is connected with one end of the third resistor, and the third connecting pin is connected with the other end of the third resistor;
and one end of the third capacitor is connected with the first connecting pin of the common mode inductor, and the other end of the third capacitor is connected with the fourth connecting pin of the common mode inductor.
According to further embodiments of the present utility model, a silicon controlled chopper power regulation circuit capable of EMC conduction, the control switch module includes:
one end of the control switch is connected with the zero line, and the other end of the control switch is connected with the second capacitor;
the relay is connected with the control switch;
a freewheel diode connected to the relay;
the first working power supply is connected with the relay and the flywheel diode;
the collector of the second triode is connected between the relay and the freewheel diode, and the emitter of the second triode is grounded;
and the second resistor is connected with the base electrode of the second triode.
According to further embodiments of the present utility model, a thyristor chopper power conditioning circuit with EMC conduction, the thyristor drive module includes:
the controller comprises a first pin, a second pin, a third pin, a fourth pin and a fifth pin, wherein the first pin is grounded, the second pin is connected with the first working power supply, the third pin is connected with the detection module, and the fourth pin is connected with the second resistor;
the fifth resistor is connected with the fifth pin;
the base electrode of the first triode is connected with the fifth resistor, and the emitting electrode of the first triode is grounded;
the fourth resistor is connected with the collector electrode of the first triode;
and the silicon controlled rectifier is connected with the fourth resistor, the third capacitor and the load.
According to further embodiments of the present utility model, an EMC-conductive thyristor chopper power regulating circuit further includes:
the switching power supply module is arranged between the interference elimination module and the first working power supply and used for outputting the first working power supply.
According to further embodiments of the present utility model, a thyristor chopper power conditioning circuit with EMC conduction, the switching power supply module includes:
the switching power supply comprises a zero line pin, a fire wire pin, a grounding pin and a power supply output pin, wherein the zero line pin is connected with one end of the first resistor, the fire wire pin is connected with the other end of the first resistor, the grounding pin is connected with the first pin of the controller, and the zero line pin is connected with the power supply output pin;
the power output pin outputs the first working power supply.
According to further embodiments of the present utility model, an EMC-conductive thyristor chopper power regulating circuit further includes:
the detection module is connected with the switching power supply module and the controller and is used for detecting alternating current zero crossing signals between the live wire and the zero wire.
According to further embodiments of the present utility model, a thyristor chopper power regulator circuit with EMC conduction, the detection module includes:
the emitter of the third triode is connected with the ground and the first pin of the controller;
one end of the sixth resistor is connected with the live wire pin, and the other end of the sixth resistor is connected with the base electrode of the third triode;
and the seventh resistor is connected with the collector electrode of the third triode and the first working power supply, and the third pin is connected with the collector electrode of the third triode and the seventh resistor.
In a second aspect, one embodiment of the present utility model provides a thyristor-chopper-based power conditioning apparatus comprising:
the silicon controlled chopper power regulating circuit capable of passing EMC conduction is as described in the first aspect.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
FIG. 1 is a block diagram of an embodiment of a SCR chopper power regulator circuit with EMC conduction in accordance with an embodiment of the present utility model;
fig. 2 is a schematic circuit diagram of an embodiment of a thyristor chopper power regulator circuit with EMC conduction in accordance with an embodiment of the utility model. FIG. 2
Reference numerals illustrate:
an interference elimination module 101, an EMC filtering module 102, a control switch module 103 and a silicon controlled drive module 104;
a switching power supply module 201, a detection module 202 and a controller 203.
Detailed Description
The conception and the technical effects produced by the present utility model will be clearly and completely described in conjunction with the embodiments below to fully understand the objects, features and effects of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present utility model based on the embodiments of the present utility model.
In the description of the present utility model, if an orientation description such as "upper", "lower", "front", "rear", "left", "right", etc. is referred to, it is merely for convenience of description and simplification of the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the utility model. If a feature is referred to as being "disposed," "secured," "connected," or "mounted" on another feature, it can be directly disposed, secured, or connected to the other feature or be indirectly disposed, secured, connected, or mounted on the other feature.
In the description of the embodiments of the present utility model, if "several" is referred to, it means more than one, if "multiple" is referred to, it is understood that the number is not included if "greater than", "less than", "exceeding", and it is understood that the number is included if "above", "below", "within" is referred to. If reference is made to "first", "second" it is to be understood as being used for distinguishing technical features and not 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.
When the silicon controlled chopper mode is carried out in an electric product, the output of the load is not a standard sine wave, and waveform mutation exists, so that the actual use of the silicon controlled chopper power regulating mode on the household electric product is limited directly by the EMC conduction test, and the problem of how to realize the silicon controlled chopper power regulating technology which can meet the relevant EMC conduction test standard in the electric product is currently in need of solving.
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a power regulating circuit based on the silicon controlled chopper, which can regulate the output power in a silicon controlled chopper mode under the condition of passing EMC conduction test.
Referring to fig. 1 and 2, fig. 1 shows a block diagram of a power conditioning circuit based on a thyristor chopper according to an embodiment of the utility model, and fig. 2 shows a schematic circuit diagram of a power conditioning circuit based on a thyristor chopper according to an embodiment of the utility model. In some embodiments, a thyristor-chopper based power conditioning circuit includes: the device comprises an interference elimination module 101, an EMC filtering module 102, a control switch module 103 and a silicon controlled drive module 104, wherein the interference elimination module 101 is connected between a live wire and a zero wire and used for inhibiting external conduction of an interference signal contained in the switching power supply on the power wire. The EMC filter module 102 is connected to the control switch module 103, and is configured to specifically suppress an abrupt interference signal generated by the load due to the thyristor chopper, so that a signal transmitted on the power line can meet the requirements of EMC conduction standards. The control switch module 103 is connected with the interference cancellation module 101, and is used for controlling the connection and disconnection of the zero line and the EMC filter module according to a control signal sent by the controller 203. One end of the thyristor driving module 104 is connected with the controller 203, and the other end is connected with the EMC filtering module 102, and is used for working according to a control signal output by the controller 203 so as to regulate the output power of the load.
The interference elimination module 101 can inhibit the output of residual interference signals of the switching power supply on the zero line and the live line, the EMC filter module 102 is specially used for inhibiting abrupt change interference signals generated by the load due to the chopper of the silicon controlled rectifier, so that the signals transmitted on the power line can meet the requirements of EMC conduction standards, the switching module 103 is controlled to be conducted according to the control signals sent by the controller 203, so that the EMC filter module, the load and the silicon controlled rectifier driving module are connected into the alternating current power supply to enable the alternating current power supply to work, and the connection of the EMC filter module, the load and the silicon controlled rectifier driving module with the alternating current power supply is cut off in a standby state to reduce standby power consumption. The scr driving module 104 operates according to a control signal sent by the controller 203 to output a control pulse to continuously adjust the output power of the load, and can adjust the output power in a scr chopping manner under the condition of passing the EMC conduction test.
Referring to fig. 1 and 2, fig. 2 is a schematic circuit diagram of a power conditioning circuit based on thyristor chopper according to an embodiment of the utility model. In some embodiments, the interference cancellation module 101 comprises: a first capacitor and a first resistor. One end of the first capacitor is connected with the live wire, and the other end of the first capacitor is connected with the zero line. One end of the first resistor is connected with the live wire, and the other end of the first resistor is connected with the zero line.
Note that the first capacitor is the capacitor CX1 in fig. 2, and the first resistor is the resistor R1 in fig. 2. The capacity of the first capacitor can be selected from 0.1 uF-0.22 uF and an X2 safety capacitor with rated voltage of AC 275V. The first resistor is a bleeder resistor, and a 1/4W resistor of 470K-1 MΩ can be selected to reduce standby power consumption and meet the safety requirement that the residual voltage between the live wire and the zero wire is reduced to below DC 36V when the power is pulled for 1 second.
The first capacitor is a safety capacitor for eliminating EMC conduction interference, the first resistor is a bleeder resistor of the first capacitor, and a proper resistance value is selected, so that the safety requirement that the residual voltage between the live wire and the zero wire is reduced to be lower than 36V when the power line plug is pulled out for 1 second can be met.
Referring to fig. 1 and 2, in some embodiments, the EMC filtering module 102 includes: the second capacitor, the third resistor, the common mode inductance and the third capacitor, one end of the second capacitor is connected with the live wire, and the other end of the second capacitor is connected with the zero line. One end of the third resistor is connected with the live wire, and the other end of the third resistor is connected with the zero line. The common mode inductor comprises a first connecting pin, a second connecting pin, a third connecting pin and a fourth connecting pin, wherein the second connecting pin is connected with one end of the third resistor, and the third connecting pin is connected with the other end of the third resistor. One end of the third capacitor is connected with the first connecting pin, and the other end of the third capacitor is connected with the fourth connecting pin.
Note that, the second capacitor is the capacitor CX2 in fig. 2, the third resistor is the resistor R3 in fig. 2, the common-mode inductance is the inductance L1 in fig. 2, and the third capacitor is the capacitor CX3 in fig. 2. The second capacitor and the third capacitor need to select an X2 safety capacitor with capacitance not lower than 1uF and rated voltage of AC275V, the capacitance of the second capacitor and the third capacitor is increased, the allowance of EMC conduction test is further increased, but the maximum capacitance should not exceed 2.5uF, and the method is suitable for application occasions of a silicon controlled chopper regulating output power mode with load not exceeding 800W. The third resistor is a bleeder resistor, a 1/4W resistor of 100K-220K is selected, and a 1/4W resistor of 470K-1 MΩ is selected as R6 for zero crossing detection. The common mode inductance can be selected from annular magnetic ring common mode inductances with inductance value not lower than 22mH and current resistance more than 1.5 times of maximum load current.
The second capacitor and the third capacitor are safety capacitors, the common-mode inductor, the second capacitor and the third capacitor form an EMC filter, the EMC filter is used for specially solving the problem that the EMC conduction interference of an alternating current load is out of standard due to the chopper of a silicon controlled rectifier, and the third resistor is a discharge resistor and is used for discharging the second capacitor and the third capacitor rapidly.
Referring to fig. 1 and 2, in some embodiments, the control switch module 103 includes: the control switch, the relay, the freewheel diode, first working power supply, second triode and second resistance, control switch one end is connected the zero line, and the second electric capacity is connected to the other end, and the relay is connected with control switch, and the freewheel diode is connected the relay, and the other end of relay and the other end of freewheel diode are connected to first working power supply. The collector of the second triode is connected with the relay and the freewheel diode, and the emitter of the second triode is grounded. The second resistor is connected with the base electrode of the second triode.
Note that, the control switch is the switch K1 in fig. 2, the relay is the relay RY1 in fig. 2, the freewheeling diode is the diode D1 in fig. 2, the first operating power supply is the 5V power supply in fig. 2 connecting the relay RY1 and the diode D1, the second triode is the triode Q2 in fig. 2, and the second resistor is the resistor R2 in fig. 2. The relay can be in a normally open type with a rated voltage of DC5V and a rated current of 2 times of maximum load working current, the freewheel diode can be in a type of 1N4148, 1N4007 and the like, the second triode can be in a type of 8050, 9014 and the like, the second triode can be in a type of NPN triode, and the second resistor can be in a type of 2.2K-4.7K.
Referring to fig. 1 and 2, in some embodiments, the scr driving module includes: the controller 203 comprises a first pin, a second pin, a third pin, a fourth pin and a fifth pin, wherein the first pin is grounded, the second pin is connected with a first working power supply, the third pin is connected with a detection module, and the fourth pin is connected with the second resistor. The fifth resistor is connected with the fifth pin. The base of the first triode is connected with the fifth resistor, and the emitter of the first triode is grounded. The fourth resistor is connected with the collector electrode of the first triode. The thyristor is connected with the fourth resistor, the third capacitor and the load.
It should be noted that, the controller 203 is the single chip microcomputer MCU in fig. 2, the fifth resistor is the resistor R5 in fig. 2, the first triode is the triode Q1 in fig. 2, the fourth resistor is the resistor R4 in fig. 2, and the silicon controlled rectifier is the silicon controlled rectifier TR1 in fig. 2. The highest operating voltage of the controller should be 5.5V, and the fifth resistor may be 2.2K-4.7K, depending on the on-current IGT required for the thyristor. The first triode is an NPN triode with the types of 8050, 9014 and the like, the fourth resistor is a 1/4W resistor with the resistance of 100-470 ohms, the specific dependence on the conduction current IGT required by the silicon controlled rectifier is that the silicon controlled rectifier is required to be selected with the type of withstand voltage of 800V and rated current of 2-3 times of maximum load working current.
Referring to fig. 1, in some embodiments, the power conditioning circuit based on the thyristor chopper further includes: the switching power supply module is arranged between the interference elimination module and the first working power supply and used for outputting the first working power supply.
Referring to fig. 1 and 2, in some embodiments, the switching power module includes: the switching power supply comprises a zero line pin, a fire wire pin, a grounding pin and a power output pin, wherein the zero line pin is connected with one end of a first resistor, the fire wire pin is connected with the other end of the first resistor, the grounding pin is connected with the first pin of the controller 203, the zero line pin is connected with the power output pin, and the power output pin outputs the first working power supply. It should be noted that the switching power supply is the non-isolated switching power supply in fig. 2, and the first working power supply is a 5V power supply connected to the fourth pin of the switching power supply.
Referring to fig. 1, in some embodiments, the power conditioning circuit based on the thyristor chopper further includes: the detection module is connected with the switching power supply module and the controller 203 and is used for detecting alternating current zero crossing signals between the live wire and the zero wire.
Referring to fig. 1 and 2, in some embodiments, the detection module includes: the third triode, the sixth resistor, the seventh resistor and the first working power supply, and the emitter of the third triode is connected to the ground and the first pin of the controller 203. One end of the sixth resistor is connected with the live wire pin, and the other end of the sixth resistor is connected with the base electrode of the third triode. The seventh resistor is connected with the collector of the third triode, and the third pin is connected with the collector of the third triode and the seventh resistor. The first working power supply is connected with the other end of the seventh resistor.
It should be noted that, the third triode is the triode Q3 in fig. 2, the sixth resistor is the resistor R6 in fig. 2, the seventh resistor is the resistor R7 in fig. 2, the first working power supply is the 5V power supply of the connecting resistor R7 in fig. 2, the third triode is an NPN triode with the model of 8050, 9014, etc., the sixth resistor is a 1/4W resistor with 470K-1 mΩ, and the seventh resistor is a resistor with 4.7K-10K.
Referring to fig. 2, in some embodiments, the power adjustment circuit further includes: the piezoresistor and the protective tube are the resistor ZNR in fig. 2, and is used for providing overvoltage protection of lightning stroke or surge for the circuit, and for 220V-240V power supply voltage, 10D471 or 14D471 and other types are recommended. The FUSE tube is the FUSE tube FUSE in fig. 2, and a slow-breaking FUSE tube with the maximum working current of 2-3 times of load and the rated voltage of 250V is selected, but the rated current of the selected FUSE tube is not lower than 1.5A at least so as to avoid the functional failure caused by impact burning in normal lightning surge test.
In some embodiments, a first capacitor is connected in parallel between the live line and the zero line of the alternating current input end of the switching power supply so as to eliminate EMC conduction interference of the switching power supply. In addition, an EMC filter composed of a common-mode inductor with an inductance value of more than 22mH, a second capacitor with a capacitance of more than or equal to 1uF and a third capacitor is connected in series in a load power supply loop, and the EMC filter is specially used for inhibiting abrupt interference signals caused by chopper of a silicon controlled rectifier at a load end so that signals transmitted on a power line meet the requirements of EMC conduction standards. Because the capacitance of the second capacitor and the third capacitor on the EMC filter is larger, the residual voltage is discharged too slowly to meet the safety requirement that the residual voltage between the live wire and the zero line must be reduced to be lower than 36V when the power is pulled out for 1 second, so a relay is arranged between the EMC filter, a load and the zero line to cut off the connection of the EMC filter, an alternating current load and the zero line of a power line when the power is turned off or standby, the third resistor on the EMC filter is prevented from causing standby power consumption to be larger than 0.5W, and the residual voltage discharge speed requirement of the safety rule on the power line pulling out is avoided from being caused by the fact that the residual voltage on the second capacitor and the third capacitor is discharged too slowly. The switching power supply supplies power to the controller, the controller controls the relay to switch off the load and the EMC filter to be connected with the zero line during standby, when the load is required to work, the controller controls the relay to switch on the EMC filter and the load to be connected with the zero line, the EMC filter starts to work, meanwhile, the controller outputs control pulses of the silicon controlled rectifier according to the detected alternating current zero crossing signal, and the chopper conduction angle of the silicon controlled rectifier is controlled to adjust the output power of the load, so that EMC conduction meets the requirement.
Note that, the neutral line is the neutral line ACN in fig. 2, and the live line is the live line ACL in fig. 2.
The relay is used for controlling the on-off of a channel between the EMC filter, the load and the zero line ACN, when the machine is in standby, the fourth pin of the controller outputs a low-level turn-off relay, the channel between the EMC filter, the load and the zero line is cut off by the control switch of the relay, residual voltage on the second capacitor and the third capacitor cannot be discharged to the zero line through the control switch of the relay, potential safety hazards that a human body touches a power plug to possibly get an electric shock after the second capacitor and the third capacitor are pulled out due to too slow discharge of the residual voltage between the live wire and the zero line caused by larger capacitance can be avoided, at the moment, the residual voltage on the second capacitor and the third capacitor is discharged through the third resistor connected in parallel, and the channel between the third resistor and the zero line ACN is cut off by the control switch of the relay, so standby power consumption cannot be influenced.
When the power regulating circuit based on the silicon controlled chopper works, the fourth pin of the controller outputs high level, the control switch of the relay is driven to be closed and conducted through the second resistor and the second triode, and at the moment, the EMC filter, the load and the silicon controlled rectifier are connected with the zero line pin of the switching power supply. The third resistor, the third triode and the seventh resistor form a zero-crossing signal detection circuit, the zero-crossing signal detection circuit is responsible for converting sine waves of alternating current power supply into square wave pulses with high and low level jump for detection of the controller, the controller outputs a silicon controlled rectifier control pulse with corresponding conduction angle according to alternating current zero-crossing point signals detected by the third pin, and the silicon controlled rectifier control pulse is driven to work through a silicon controlled rectifier driving module formed by the fifth resistor, the first triode, the fourth resistor and the silicon controlled rectifier to regulate output power of a load. At the moment, the EMC filter is connected into a live wire and zero wire power supply loop, so that the EMC problem that abrupt interference signals are conducted through a power line due to the fact that loads are chopped by the silicon controlled rectifier is solved. The common-mode inductor selects proper inductance and the second capacitor and the third capacitor selects proper capacitance parameters, so that the EMC conduction interference amplitude caused by the silicon controlled chopper can be reduced to be within the range required by EMC standard.
The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model. Furthermore, embodiments of the utility model and features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A silicon controlled chopper power regulating circuit capable of conducting EMC, comprising:
the interference elimination module is connected between the live wire and the zero wire and used for inhibiting external conduction of EMC interference signals contained in the switching power supply on the power wire;
the EMC filter module is used for inhibiting abrupt interference signals generated by load due to the chopper of the silicon controlled rectifier so that the signals transmitted on the power line can meet the requirements of EMC conduction standards;
the control switch module is connected with the interference elimination module at one end and the EMC filtering module at the other end, and is used for controlling the connection and disconnection of the zero line and the EMC filtering module according to a control signal sent by the controller;
and one end of the silicon controlled rectifier driving module is connected with the controller, and the other end of the silicon controlled rectifier driving module is connected with the EMC filtering module and is used for working according to a control signal sent by the controller so as to adjust the output power of a load.
2. The EMC-conduction-through thyristor chopper power regulating circuit of claim 1, wherein said interference cancellation module comprises:
one end of the first capacitor is connected with the live wire, and the other end of the first capacitor is connected with the zero line;
and one end of the first resistor is connected with the live wire, and the other end of the first resistor is connected with the zero line.
3. The EMC-conduction-through thyristor chopper power regulating circuit of claim 2, wherein the EMC filter module comprises:
one end of the second capacitor is connected with the live wire, and the other end of the second capacitor is connected with the zero line;
one end of the third resistor is connected with the live wire, and the other end of the third resistor is connected with the zero line;
the common mode inductor comprises a first connecting pin, a second connecting pin, a third connecting pin and a fourth connecting pin, wherein the second connecting pin is connected with one end of the third resistor, and the third connecting pin is connected with the other end of the third resistor;
and one end of the third capacitor is connected with the first connecting pin of the common mode inductor, and the other end of the third capacitor is connected with the fourth connecting pin of the common mode inductor.
4. The EMC-conduction-through thyristor chopper power regulating circuit of claim 3, wherein said control switch module comprises:
one end of the control switch is connected with the zero line, and the other end of the control switch is connected with the second capacitor;
the relay is connected with the control switch;
a freewheel diode connected to the relay;
the first working power supply is connected with the follow current diode and the follow current diode;
the collector of the second triode is connected between the relay and the freewheel diode, and the emitter of the second triode is grounded;
and the second resistor is connected with the base electrode of the second triode.
5. The EMC-conduction-passing thyristor chopper power regulating circuit of claim 4, wherein said thyristor drive module comprises:
the controller comprises a first pin, a second pin, a third pin, a fourth pin and a fifth pin, wherein the first pin is grounded, the second pin is connected with the first working power supply, and the fourth pin is connected with the second resistor;
the fifth resistor is connected with the fifth pin;
the base electrode of the first triode is connected with the fifth resistor, and the emitting electrode of the first triode is grounded;
the fourth resistor is connected with the collector electrode of the first triode;
and the silicon controlled rectifier is connected with the fourth resistor, the third capacitor and the load.
6. The EMC-conductive thyristor chopper power regulating circuit of claim 5, further comprising:
the switching power supply module is arranged between the interference elimination module and the first working power supply and used for outputting the first working power supply.
7. The EMC-conduction-through thyristor chopper power regulating circuit of claim 6, wherein said switching power supply module comprises:
the switching power supply comprises a zero line pin, a fire wire pin, a grounding pin and a power supply output pin, wherein the zero line pin is connected with one end of the first resistor, the fire wire pin is connected with the other end of the first resistor, the grounding pin is connected with the first pin of the controller, and the zero line pin is connected with the power supply output pin;
the power output pin outputs the first working power supply.
8. The EMC-conductive thyristor chopper power regulating circuit of claim 7, further comprising:
the detection module is connected with the third pin and used for detecting alternating current zero crossing signals between the live wire and the zero wire.
9. The EMC-conduction-through thyristor chopper power regulating circuit of claim 8, wherein said detection module comprises:
the emitter of the third triode is connected with the ground and the first pin of the controller;
one end of the sixth resistor is connected with the live wire pin, and the other end of the sixth resistor is connected with the base electrode of the third triode;
and the seventh resistor is connected with the collector electrode of the third triode and the first working power supply, and the third pin is connected with the collector electrode of the third triode and the seventh resistor.
10. A thyristor-chopper-based power conditioning apparatus, comprising:
an EMC-conductive thyristor chopper power regulating circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223610168.3U CN219329694U (en) | 2022-12-30 | 2022-12-30 | Silicon controlled chopper power regulating circuit capable of conducting EMC and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223610168.3U CN219329694U (en) | 2022-12-30 | 2022-12-30 | Silicon controlled chopper power regulating circuit capable of conducting EMC and equipment |
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| Publication Number | Publication Date |
|---|---|
| CN219329694U true CN219329694U (en) | 2023-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223610168.3U Active CN219329694U (en) | 2022-12-30 | 2022-12-30 | Silicon controlled chopper power regulating circuit capable of conducting EMC and equipment |
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| Country | Link |
|---|---|
| CN (1) | CN219329694U (en) |
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2022
- 2022-12-30 CN CN202223610168.3U patent/CN219329694U/en active Active
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