CN112981861A - Control device and clothes treatment device - Google Patents
Control device and clothes treatment device Download PDFInfo
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- CN112981861A CN112981861A CN202110276457.5A CN202110276457A CN112981861A CN 112981861 A CN112981861 A CN 112981861A CN 202110276457 A CN202110276457 A CN 202110276457A CN 112981861 A CN112981861 A CN 112981861A
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- capacitor
- control
- motor
- control device
- diode
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/08—Control circuits or arrangements thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Textile Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Inverter Devices (AREA)
Abstract
The present invention provides a control device and a laundry treating apparatus, the control device is used for controlling a motor, the control device includes: at least two bus bars, a diode, a first control component and at least two capacitors; the at least two buses are used for being connected with the motor; the first control component is connected with the diode in parallel, and the first control component and one end of the diode are simultaneously connected with one of the at least two buses; one end of one of the at least two capacitors is connected with the first control component and the other end of the diode, the other end of the one of the at least two capacitors is connected with the other bus of the at least two buses, and two ends of the other capacitor of the at least two capacitors are connected with the at least two buses respectively. When the driving motor works, the capacitor connected with the first control part and the diode in series can absorb surge voltage on the input side of the alternating current power supply, and the control device and the motor can meet surge test requirements of relevant standards.
Description
Technical Field
The invention relates to the technical field of motor control, in particular to a control device and a clothes treatment device.
Background
At present, in the related art, a motor controller using a small bus capacitor and a capacitor without an electrolytic capacitor has been applied to control of a motor due to its characteristics of small size, long service life, high power factor, and the like. However, the small bus capacitor/electrolytic capacitor-free motor controller cannot absorb the surge voltage at the input side of the ac power supply due to the small bus capacitor value, and is difficult to meet the surge test requirements of the IEC (International Electrotechnical Commission) standard or the chinese national standard.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention proposes a control device.
A second aspect of the present invention proposes a laundry treating apparatus.
In view of this, a first aspect of the present invention provides a control device for controlling a motor, the control device including: at least two bus bars, a diode, a first control component and at least two capacitors; the at least two buses are used for being connected with the motor; the first control component is connected with the diode in parallel, and the first control component and one end of the diode are simultaneously connected with one of the at least two buses; one end of one of the at least two capacitors is connected with the first control component and the other end of the diode, the other end of the one of the at least two capacitors is connected with the other bus of the at least two buses, and two ends of the other capacitor of the at least two capacitors are connected with the at least two buses respectively.
The control device provided by the invention comprises at least two buses and at least two capacitors, wherein one side of each bus can be connected with a power supply, and the other side of each bus can be connected with a motor to supply power to the motor. At least two capacitors are connected in parallel, one capacitor of the at least two capacitors is connected with one bus of the at least two buses through the first control component, and the diode is connected with the first control component in parallel.
When the driving motor works, the capacitor connected with the first control part and the diode in series can absorb surge voltage on the input side of the alternating current power supply, and the control device and the motor can meet surge test requirements of relevant standards.
Specifically, the surge voltage on the input side of the alternating-current power supply is absorbed by the capacitor which is connected with the first control component and the diode in series at the same time, so that the motor can meet the surge test requirements of IEC (International Electrotechnical Commission) standard or China national standard more easily.
When the motor is driven by the control device, the first control part can control whether the capacitor which is connected with the first control part and the diode in series in at least two capacitors is charged or discharged, when the first control part is conducted, the diode is short-circuited, and the capacitor which is connected with the first control part and the diode in series is charged or discharged, so that the low-frequency noise of the system caused by torque pulsation of the control device is reduced. When the first control part is disconnected, the diode can prevent the capacitor connected in series with the first control part and the diode from charging and discharging simultaneously, and the voltage ripple and the current ripple of the capacitor connected in series with the first control part and the diode simultaneously when the control device works are prevented from exceeding the standard, so that the protection of the capacitor connected in series with the first control part and the diode simultaneously is realized.
Specifically, when the control device controls the motor to work at low power, low rotating speed and high torque, the first control part is conducted, the first control part is used for short-circuiting the diode, and the capacitor connected with the first control part in series is charged and discharged, so that at least two capacitors are connected in parallel, the total capacitance value of the capacitor is increased while surge voltage is absorbed, the torque pulsation of the motor is reduced, and the noise of the motor during working is reduced.
The motor works with low power, specifically, the power of the motor is less than or equal to 150W (watt), the motor works with low rotating speed, specifically, the rotating speed of the motor is less than or equal to 600rpm, and the motor works with high torque, specifically, the torque of the motor is more than or equal to 2Nm (Nm).
When the control device controls the motor to work at high power, high rotating speed and low torque, the first control part is disconnected, the diode prevents the capacitor connected with the diode in series from charging and discharging, the total capacitance value of the capacitor is reduced while surge voltage is absorbed, and the control device works in a small-capacitance/electrolytic-capacitor-free working mode, so that the input power factor of the control device can be improved, the input current harmonic wave is reduced, and the pollution of the control device to a power grid is reduced. And when the motor works at high power, high rotating speed and low torque, the capacitor connected in series with the diode is not charged or discharged, so that the use frequency of the capacitor connected in series with the diode is reduced, the service life of the capacitor connected in series with the diode is prolonged, and the use cost of the control device is reduced.
The motor works with high power, specifically, the power of the motor is more than or equal to 600W, the motor works with high rotating speed, specifically, the rotating speed of the motor is more than or equal to 1500rpm, and the motor works with low torque, specifically, the torque of the motor is less than or equal to 0.5 Nm.
In addition, the control device in the above technical solution provided by the present invention may further have the following additional technical features:
in one technical scheme of the invention, the control device further comprises a first control circuit, and the first control circuit is connected with the first control component to control the first control component to be switched on or switched off according to the running state of the motor.
In the technical scheme, the first control circuit is connected with the first control component, and can control the first control component to switch between on and off, so that the first control component is controlled. According to the running state control first control unit of motor switch on or break off for two at least electric capacities can carry out charge and discharge according to the motor work needs, and total appearance value can change according to the operating condition of motor, avoids a plurality of operating condition that fixed total appearance value can't adapt to the motor, and then when reducing the motor noise, promotes the life of electric capacity.
Specifically, when the control device controls the motor to work with low power, low rotating speed and high torque, the first control circuit controls the first control component to be conducted. When the control device controls the motor to work at high power, high rotating speed and low torque, the first control circuit controls the first control part to be disconnected, so that at least two capacitors can be charged and discharged according to the working requirement of the motor, and the total capacitance value can be changed according to the working state of the motor.
The first control component can be an electronic switch tube or a mechanical switch, and the first control circuit can be a main control board or an independent control circuit.
When the first control circuit is a main control board, the first control part is controlled to be conducted while the motor is controlled to work at low power, low rotating speed and high torque.
When the first control circuit is an independent control circuit, the main control board controls the control device, so that the control device controls the motor to work at low power, low rotating speed and high torque, and simultaneously sends a control instruction to the first control circuit, so that the first control circuit controls the first control part to be conducted.
In one aspect of the present invention, the at least two capacitors include a first capacitor and a second capacitor; one end of the first capacitor is connected with the first control component and the diode at the same time, and the other end of the first capacitor is connected with the other bus of the at least two buses; two ends of the second capacitor are respectively connected with at least two buses.
In the technical scheme, the first capacitor is connected in series with the first control component, the first capacitor is connected in series with the diode, the diode is connected in parallel with the first control component, and the first capacitor is connected with one of the at least two buses through the first control component or the diode, so that the first control component can control whether the first capacitor is charged and discharged, and control over the first capacitor is achieved.
In one embodiment of the present invention, a capacitance value of the first capacitor is greater than a capacitance value of the second capacitor.
In the technical scheme, the capacitance value of the first capacitor is larger than that of the second capacitor, when the control device controls the motor to work at low power, low rotating speed and high torque, the first control part is switched on, the first capacitor is charged and discharged, and then the surge voltage is absorbed, so that the total capacitance value is larger to effectively reduce the torque pulsation of the motor, and further reduce the noise of the motor during working. When the control device controls the motor to work at high power, high rotating speed and low torque, the first control part is disconnected, the first capacitor is not charged and discharged, and the control device works in a small capacitor/electrolytic capacitor-free working mode, so that the input power factor of the control device can be improved, the input current harmonic wave is reduced, and the pollution of the control device to a power grid is reduced. And the surge voltage can be absorbed, the use frequency of the first capacitor is reduced, the requirement on the service life of the first capacitor is reduced, the cost of the first capacitor can be reduced, and the cost of the control device is further reduced.
In one technical scheme of the invention, the capacitance value of the first capacitor is less than or equal to 100 mu F; the capacitance value of the second capacitor is less than or equal to 10 muF.
In the technical scheme, the capacitance value of the first capacitor is less than or equal to 100 muF, and when the first capacitor is connected to the control device, the total capacitance value can be effectively increased, so that the torque ripple of the motor is reduced, and the noise of the motor during working is reduced. The capacitance value of the second capacitor is less than or equal to 10 muF, when the first capacitor is not charged or discharged, the motor can be ensured to stably run under the states of high power, high rotating speed and small torque, and the control device works in a small-capacitor/electrolytic-capacitor-free working mode, so that the input power factor of the control device can be improved, the input current harmonic wave is reduced, and the pollution of the control device to a power grid is reduced.
Because the capacitance values of the first capacitor and the second capacitor are reduced, and the volumes of the first capacitor and the second capacitor are reduced, the volume of the control device is reduced, the occupation of the control device on the space is reduced, and the miniaturization of the control device is facilitated. And because the capacitance values of the first capacitor and the second capacitor are reduced, the cost of the first capacitor and the cost of the second capacitor can be reduced, and the cost of the control device is further reduced.
In one embodiment of the present invention, the control device further includes a second control component, one end of the second control component is connected to one of the at least two buses, and the other end of the second control component is connected to the second capacitor.
In the technical scheme, the second capacitor is connected with one of the at least two buses through the second control part, so that the second control part can control the second capacitor to be connected to or separated from the control device, the flexibility of controlling the second capacitor is improved, and the second capacitor can be connected to the control device according to the working requirements of the motor and the control device.
Specifically, when at least two electric capacities include two electric capacities, first electric capacity and second electric capacity promptly, controlling means control motor miniwatt, low rotational speed, big torque work, first control unit switches on, first electric capacity carries out the charge-discharge, the second control unit switches on, second electric capacity access controlling means, and then make first electric capacity and second electric capacity parallelly connected, when absorbing surge voltage, increase the total capacity value of electric capacity, reduce the torque ripple of motor, and then reduce the noise of motor at the during operation.
The control device controls the motor to work at high power, high rotating speed and low torque, the first control part is disconnected, the first capacitor is not charged and discharged, the second control part is connected, the second capacitor is connected into the control device, and the control device works in a small capacitor/electrolytic capacitor-free working mode while absorbing surge voltage, so that the input power factor of the control device can be improved, the input current harmonic wave is reduced, and the pollution of the control device to a power grid is reduced. And when the motor works at high power, high rotating speed and low torque, the first capacitor is not connected to the control device, so that the use frequency of the first capacitor is reduced, the service life of the first capacitor is prolonged, and the use cost of the control device is reduced.
When at least two electric capacities include three electric capacities or more electric capacities, namely at least two electric capacities include at least one third electric capacity, controlling means control motor miniwatt, low rotational speed, big torque work, first control unit switches on, first electric capacity access controlling means, the second control unit switches on, the second electric capacity access controlling means, and then make first electric capacity, second electric capacity and at least one third electric capacity parallelly connected, increase the total capacity value of electric capacity, reduce the torque ripple of motor, and then reduce the noise of motor during operation.
The control device controls the motor to work at high power, high rotating speed and low torque, the second control part is switched on, the second capacitor is switched in the control device, the first control part is switched off, the first capacitor is not switched in the control device, the third control part is switched off, the third capacitor is not switched in the control device, and the control device works in a small capacitor/electrolytic capacitor-free working mode, so that the input power factor of the control device can be improved, the input current harmonic wave is reduced, and the pollution of the control device to a power grid is reduced. And when the motor works at high power, high rotating speed and low torque, the first capacitor and the third capacitor are not connected to the control device, so that the use frequency of the first capacitor and the third capacitor is reduced, the service lives of the first capacitor and the third capacitor are prolonged, and the use cost of the control device is reduced.
The second control component can be an electronic switch tube or a mechanical switch, and the second control circuit can be a main control board or an independent control circuit.
In one technical solution of the present invention, the control device further includes a second control circuit, and the second control circuit is connected to the second control unit to control the second control unit to be turned on or off.
In the technical scheme, the second control circuit is connected with the second control component, and can control the second control component to switch between on and off, so that the second control component is controlled.
In one technical scheme of the invention, the control device further comprises a rectifying circuit and an inverter circuit, wherein one side of the rectifying circuit is used for connecting a power supply, and the other side of the rectifying circuit is connected with at least two buses; the inverter circuit is connected with at least two buses; the motor is connected with the inverter circuit.
In the technical scheme, the rectifying circuit is connected with a power supply, so that alternating current output by the power supply is converted into direct current and is transmitted to the motor through the bus, and parameters such as power, rotating speed and torque of the motor are conveniently controlled. The inverter circuit converts the direct current output by the rectifying circuit into alternating current, and then the driving of the motor is realized.
The first capacitor, the second capacitor, the first control component, the second control component, the first control circuit, the second control circuit and the diode are arranged between the rectifying circuit and the inverter circuit.
In one embodiment of the present invention, the second capacitor is a thin film capacitor.
In particular, the thin film capacitor may be a CBB capacitor (polypropylene capacitor) or other kind of thin film capacitor.
In one technical scheme of the invention, the power supply can be a three-phase power supply or a single-phase power supply. The motor can be a three-phase motor or a single-phase motor.
When the power supply is a three-phase power supply, the rectification circuit is a three-phase rectification circuit.
When the power supply is a single-phase power supply, the rectification circuit is a single-phase rectification circuit.
When the motor is a three-phase motor, the inverter circuit is a three-phase inverter circuit, and the number of bridge arms of the inverter circuit is three.
When the motor is a single-phase motor, the inverter circuit is a single-phase inverter circuit, and the number of bridge arms of the inverter circuit is two.
In one embodiment of the present invention, the at least two bus bars include a positive bus bar and a negative bus bar.
One contact of the first capacitor is connected with the positive bus through the first control component and the diode, the first control component is connected with the diode in parallel, and the other contact of the first capacitor is connected with the negative bus.
Or one contact of the first capacitor is connected with the negative bus through the first control part and the diode, the first control part is connected with the diode in parallel, and the other contact of the first capacitor is connected with the positive bus.
One contact of the second capacitor is connected with the positive bus through the second control part, and the other contact of the second capacitor is connected with the negative bus. Or one contact point of the second capacitor is connected with the negative bus through the second control part, and the other contact point of the second capacitor is connected with the positive bus.
The conducting direction of the diode is that the anode bus is conducted to the first capacitor, or the first capacitor is conducted to the cathode bus.
A second aspect of the present invention provides a laundry treating apparatus comprising the control device according to any of the above claims, and therefore the laundry treating apparatus comprises all the advantages of the control device according to any of the above claims.
Specifically, when the clothes treatment device is in a washing mode, the control device needs to control the motor to work at low power, low rotating speed and high torque, the first control part is conducted, the first control part is used for short-circuiting the diode, the capacitor connected with the first control part in series is charged and discharged, at least two capacitors are connected in parallel, surge voltage is absorbed, the total capacitance value of the capacitors is increased, the torque pulsation of the motor is reduced, the noise of the motor during working is reduced, the cleaning effect of the clothes treatment device on clothes is ensured, the noise of the clothes treatment device during clothes cleaning is reduced, the noise pollution caused by the clothes treatment device on an indoor environment is reduced, and a user can better experience. When the clothes treatment device works, the capacitor connected with the first control component and the diode in series absorbs surge voltage at the input side of the alternating current power supply, so that the clothes treatment device can meet surge test requirements of relevant standards, such as IEC (International Electrotechnical Commission) standards or China national standards.
The motor works with low power, specifically, the power of the motor is less than or equal to 150W, the motor works with low rotating speed, specifically, the rotating speed of the motor is less than or equal to 600rpm, and the motor works with high torque, specifically, the torque of the motor is more than or equal to 2 Nm.
When the clothes processing device is in a dehydration mode, the control device needs to control the motor to work at high power, high rotating speed and low torque, the first control part is disconnected, the diode prevents the capacitor connected with the diode in series from charging and discharging, and the control device works in a small-capacitor/non-electrolytic-capacitor working mode while absorbing surge voltage, so that the input power factor of the control device can be improved, the input current harmonic wave is reduced, and the pollution of the control device to a power grid is reduced. And when the motor works at high power, high rotating speed and low torque, the capacitor connected in series with the diode is not charged or discharged, so that the use frequency of the capacitor connected in series with the diode is reduced, the service life of the capacitor connected in series with the diode is prolonged, and the use cost of the control device is reduced.
The motor works with high power, specifically, the power of the motor is more than or equal to 600W, the motor works with high rotating speed, specifically, the rotating speed of the motor is more than or equal to 1500rpm, and the motor works with low torque, specifically, the torque of the motor is less than or equal to 0.5 Nm.
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 shows a circuit schematic of a control device according to an embodiment of the invention;
FIG. 2 shows a circuit schematic of a control device according to another embodiment of the invention;
FIG. 3 shows a circuit schematic of a control device according to yet another embodiment of the invention;
FIG. 4 shows a circuit schematic of a control device according to yet another embodiment of the invention;
FIG. 5 shows a circuit schematic of a control device according to yet another embodiment of the invention;
FIG. 6 shows a circuit schematic of a control device according to yet another embodiment of the invention;
fig. 7 shows a circuit schematic of a control device according to a further embodiment of the invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 7 is:
100 bus, 102 positive bus, 104 negative bus, 200 diode, 202 first control part, 204 second control part, 300 capacitor, 302 first capacitor, 304 second capacitor, 402 first control circuit, 404 second control circuit, 500 rectifier circuit, 600 inverter circuit, 700 inductor, 800 power supply, 900 motor.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. 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.
The control device and the laundry treating device according to some embodiments of the present invention are described below with reference to fig. 1 to 7.
The first embodiment is as follows:
as shown in fig. 1 and 2, the present invention provides a control apparatus for controlling a motor 900, the control apparatus including: at least two busbars 100, a diode 200, a first control component 202 and at least two capacitors 300; at least two bus bars 100 are used for connecting with the motor 900; the first control component 202 is connected with the diode 200 in parallel, and the first control component 202 and one end of the diode 200 are simultaneously connected with one bus 100 of the at least two buses 100; one end of one capacitor 300 of the at least two capacitors 300 is simultaneously connected with the first control part 202 and the other end of the diode 200, the other end is connected with the other bus 100 of the at least two buses 100, and two ends of the other capacitor 300 of the at least two capacitors 300 are respectively connected with the at least two buses 100.
In this embodiment, the control device comprises at least two bus bars 100 and at least two capacitors 300, and at least two bus bars 100 are connectable to the power source 800 on one side and to the motor 900 on the other side to supply power to the motor 900. At least two capacitors 300 are connected in parallel, and one capacitor 300 of the at least two capacitors 300 is connected to one bus 100 of the at least two buses 100 through a first control part 202, and a diode 200 is connected in parallel to the first control part 202.
When the driving motor 900 is in operation, the capacitor 300 connected in series with the first control component 202 and the diode 200 can absorb the surge voltage on the input side of the alternating current power supply, so that the control device and the motor 900 can meet the surge test requirements of relevant standards.
Specifically, the surge voltage on the input side of the ac power supply is absorbed by the capacitor 300 connected in series to both the first control unit 202 and the diode 200, so that the motor 900 can more easily meet the surge test requirements of the IEC (International electrical Commission) standard or the chinese national standard.
When the motor 900 is driven by the control device, the first control part 202 can control whether the capacitor 300 connected in series with the first control part 202 and the diode 200 at the same time is charged or discharged or not in at least two capacitors 300, when the first control part 202 is conducted, the diode 200 is short-circuited, and the capacitor 300 connected in series with the first control part 202 and the diode 200 is charged or discharged, thereby reducing the low-frequency noise of the system caused by the torque ripple of the control device. When the first control part 202 is disconnected, the diode 200 can prevent the capacitor 300 connected in series with the first control part 202 and the diode 200 from being charged and discharged at the same time, and prevent the voltage ripple and the current ripple of the capacitor 300 connected in series with the first control part 202 and the diode 200 from exceeding the standard when the control device works, so that the capacitor 300 connected in series with the first control part 202 and the diode 200 at the same time can be protected.
Specifically, when the control device controls the motor 900 to work at a low power, a low rotation speed and a high torque, the first control part 202 is turned on, the diode 200 is short-circuited by the first control part 202, and the capacitor 300 connected in series with the first control part 202 is charged and discharged, so that at least two capacitors 300 are connected in parallel, the total capacitance value of the capacitor 300 is increased while surge voltage is absorbed, the torque ripple of the motor 900 is reduced, and the noise of the motor 900 during working is reduced.
The motor 900 operates at a low power, specifically, the power of the motor 900 is not more than 150W (watt), the motor 900 operates at a low rotation speed, specifically, the rotation speed of the motor 900 is not more than 600rpm, and the motor 900 operates at a high torque, specifically, the torque of the motor 900 is not less than 2Nm (Nm).
When the control device controls the motor 900 to work at high power, high rotating speed and low torque, the first control part 202 is disconnected, the diode 200 prevents the capacitor 300 connected with the diode 200 in series from charging and discharging, the total capacitance value of the capacitor 300 is reduced while surge voltage is absorbed, and the control device works in a small-capacitor/electrolytic-capacitor-free working mode, so that the input power factor of the control device can be improved, the input current harmonic wave is reduced, and the pollution of the control device to a power grid is reduced. And when the motor 900 works at high power, high rotating speed and low torque, the capacitor 300 connected in series with the diode 200 is not charged or discharged, so that the use frequency of the capacitor 300 connected in series with the diode 200 is reduced, the service life of the capacitor 300 connected in series with the diode 200 is prolonged, and the use cost of the control device is reduced.
The motor 900 works with high power, specifically, the power of the motor 900 is more than or equal to 600W, the motor 900 works with high rotating speed, specifically, the rotating speed of the motor 900 is more than or equal to 1500rpm, and the motor 900 works with low torque, specifically, the torque of the motor 900 is less than or equal to 0.5 Nm.
Example two:
the present embodiment provides a control apparatus, and in addition to the technical features of the above-described embodiments, further includes the following technical features.
As shown in fig. 3 and 4, the control device further includes a first control circuit 402, and the first control circuit 402 is connected to the first control unit 202 to control the first control unit 202 to be turned on or off according to the operation state of the motor 900.
In this embodiment, the first control circuit 402 is connected to the first control unit 202, and can control the first control unit 202 to switch between on and off, so as to control the first control unit 202. The first control part 202 is controlled to be switched on or switched off according to the running state of the motor 900, so that at least two capacitors 300 can be charged and discharged according to the working requirements of the motor 900, the total capacitance value can be changed according to the working state of the motor 900, the phenomenon that the fixed total capacitance value cannot adapt to a plurality of working states of the motor 900 is avoided, and the service life of the capacitor 300 is prolonged while the noise of the motor 900 is reduced.
Specifically, when the control device controls the motor 900 to operate at low power, low rotation speed and high torque, the first control circuit 402 controls the first control component 202 to be conducted. When the control device controls the motor 900 to work at high power, high rotating speed and low torque, the first control circuit 402 controls the first control part 202 to be disconnected, so that at least two capacitors 300 can be charged and discharged according to the working requirement of the motor 900, and the total capacitance value can be changed according to the working state of the motor 900.
The first control unit 202 may be an electronic switch or a mechanical switch, and the first control circuit 402 may be a main control board or a separate control circuit.
When the first control circuit 402 is a main control board, the first control unit 202 is controlled to be turned on while the motor 900 is controlled to operate at a low power, a low rotation speed, and a high torque.
When the first control circuit 402 is a separate control circuit, the main control board controls the control device, so that the control device controls the motor 900 to operate at a low power, a low rotation speed, and a high torque, and simultaneously sends a control command to the first control circuit 402, so that the first control circuit 402 controls the first control unit 202 to be turned on.
Example three:
the present embodiment provides a control apparatus, and in addition to the technical features of the above-described embodiments, further includes the following technical features.
As shown in fig. 1 and 2, the at least two capacitors 300 include a first capacitor 302 and a second capacitor 304; one end of the first capacitor 302 is connected to the first control unit 202 and the diode 200, and the other end is connected to the other bus 100 of the at least two buses 100; two ends of the second capacitor 304 are respectively connected to the at least two bus bars 100.
In this embodiment, the first capacitor 302 is connected in series with the first control component 202, the first capacitor 302 is connected in series with the diode 200, the diode 200 is connected in parallel with the first control component 202, and the first capacitor 302 is connected with one bus 100 of the at least two buses 100 through the first control component 202 or the diode 200, so that the first control component 202 can control whether the first capacitor 302 is charged or discharged, thereby controlling the first capacitor 302.
Example four:
the present embodiment provides a control apparatus, and in addition to the technical features of the above-described embodiments, further includes the following technical features.
The capacitance of the first capacitor 302 is larger than the capacitance of the second capacitor 304.
In this embodiment, the capacitance value of the first capacitor 302 is greater than that of the second capacitor 304, when the control device controls the motor 900 to operate at a low power, a low rotation speed and a high torque, the first control part 202 is turned on, and the first capacitor 302 is charged and discharged, so that the total capacitance value is greater while absorbing the surge voltage, thereby effectively reducing the torque ripple of the motor 900, and further reducing the noise of the motor 900 during operation. When the control device controls the motor 900 to work at high power, high rotating speed and low torque, the first control part 202 is disconnected, the first capacitor 302 is not charged or discharged, and the control device works in a working mode of small capacitor/no electrolytic capacitor, so that the input power factor of the control device can be improved, the input current harmonic wave can be reduced, and the pollution of the control device to a power grid can be reduced. And can absorb surge voltage, reduce the use frequency of the first capacitor 302,
the requirement on the service life of the first capacitor 302 is reduced, the cost of the first capacitor 302 can be reduced, and the cost of the first control device can be further reduced.
Example five:
the present embodiment provides a control apparatus, and in addition to the technical features of the above-described embodiments, further includes the following technical features.
The capacitance value of the first capacitor 302 is less than or equal to 100 μ F; the capacitance value of the second capacitor 304 is less than or equal to 10 muF.
In this embodiment, the capacitance of the first capacitor 302 is less than or equal to 100 μ F, and when the first capacitor 302 is connected to the control device, the total capacitance can be effectively increased, so as to reduce the torque ripple of the motor 900, and further reduce the noise of the motor 900 during operation. The capacitance value of the second capacitor 304 is less than or equal to 10 muF, when the first capacitor 302 is not charged or discharged, the motor 900 can be ensured to stably run under the states of high power, high rotating speed and small torque, and meanwhile, the control device works in a small-capacitor/electrolytic-capacitor-free working mode, so that the input power factor of the control device can be improved, the input current harmonic wave can be reduced, and the pollution of the control device to a power grid can be reduced.
Because the capacitance values of the first capacitor 302 and the second capacitor 304 are reduced, and the volumes of the first capacitor 302 and the second capacitor 304 are reduced, the volume of the control device is reduced, the occupation of the control device on the space is reduced, and the miniaturization of the control device is facilitated. And because the capacitance values of the first capacitor 302 and the second capacitor 304 are reduced, the cost of the first capacitor 302 and the second capacitor 304 can be reduced, and the cost of the control device is further reduced.
Example six:
the present embodiment provides a control apparatus, and in addition to the technical features of the above-described embodiments, further includes the following technical features.
As shown in fig. 3 and 4, the control device further includes a second control component 204, one end of the second control component 204 is connected to one bus 100 of the at least two buses 100, and the other end is connected to a second capacitor 304.
In this embodiment, the second capacitor 304 is connected to one bus bar 100 of the at least two bus bars 100 through the second control component 204, so that the second control component 204 can control the second capacitor 304 to be connected to or disconnected from the control device, thereby improving the flexibility of controlling the second capacitor 304, and enabling the second capacitor 304 to be connected to the control device according to the operation requirements of the motor 900 and the control device.
Specifically, as shown in fig. 1 and fig. 2, when at least two capacitors 300 include two capacitors, that is, a first capacitor 302 and a second capacitor 304, the control device controls the motor 900 to operate at a low power, a low rotation speed, and a high torque, the first control component 202 is turned on, the first capacitor 302 is charged and discharged, the second control component 204 is turned on, and the second capacitor 304 is connected to the control device, so that the first capacitor 302 and the second capacitor 304 are connected in parallel, and when the surge voltage is absorbed, the total capacitance value of the capacitor 300 is increased, the torque ripple of the motor 900 is reduced, and the noise of the motor 900 during operation is reduced.
The control device controls the motor 900 to work at high power, high rotating speed and low torque, the first control part 202 is disconnected, the first capacitor 302 is not charged or discharged, the second control part 204 is connected, the second capacitor 304 is connected to the control device, and the control device works in a small-capacitor/electrolytic-capacitor-free working mode while absorbing surge voltage, so that the input power factor of the control device can be improved, the input current harmonic wave is reduced, and the pollution of the control device to a power grid is reduced. And when the motor 900 works at high power, high rotating speed and low torque, the first capacitor 302 is not connected to the control device, so that the use frequency of the first capacitor 302 is reduced, the service life of the first capacitor 302 is prolonged, and the use cost of the control device is reduced.
When the at least two capacitors 300 include three capacitors 300 or more capacitors 300, that is, the at least two capacitors 300 include at least one third capacitor 300, the control device controls the motor 900 to operate at low power, low rotation speed and high torque, the first control part 202 is connected, the first capacitor 302 is connected to the control device, the second control part 204 is connected, and the second capacitor 304 is connected to the control device, so that the first capacitor 302, the second capacitor 304 and the at least one third capacitor 300 are connected in parallel, the total capacitance value of the capacitors 300 is increased, the torque ripple of the motor 900 is reduced, and the noise of the motor 900 during operation is reduced.
The control device controls the motor 900 to work at high power, high rotating speed and low torque, the second control part 204 is switched on, the second capacitor 304 is switched in the control device, the first control part 202 is switched off, the first capacitor 302 is not switched in the control device, the third control part is switched off, the third capacitor is not switched in the control device, and the control device works in a small-capacitor/non-electrolytic-capacitor working mode, so that the input power factor of the control device can be improved, the input current harmonic wave is reduced, and the pollution of the control device to a power grid is reduced. And when the motor 900 works at high power, high rotating speed and low torque, the first capacitor 302 and the third capacitor are not connected to the control device, so that the use frequency of the first capacitor 302 and the third capacitor is reduced, the service lives of the first capacitor 302 and the third capacitor are prolonged, and the use cost of the control device is further reduced.
The second control unit 204 may be an electronic switch or a mechanical switch, and the second control circuit 404 may be a main control board or a separate control circuit.
Example seven:
the present embodiment provides a control apparatus, and in addition to the technical features of the above-described embodiments, further includes the following technical features.
As shown in fig. 3 and 4, the control device further includes a second control circuit 404, and the second control circuit 404 is connected to the second control unit 204 to control the second control unit 204 to be turned on or off.
In this embodiment, the second control circuit 404 is connected to the second control component 204, and can control the second control component 204 to switch between on and off, so as to control the second control component 204.
Example eight:
the present embodiment provides a control apparatus, and in addition to the technical features of the above-described embodiments, further includes the following technical features.
As shown in fig. 1 and fig. 2, the control device further includes a rectifying circuit 500 and an inverter circuit 600, wherein one side of the rectifying circuit 500 is used for connecting a power supply 800, and the other side is connected with at least two buses 100; the inverter circuit 600 is connected to at least two bus bars 100; the motor 900 is connected to the inverter circuit 600.
In this embodiment, the rectifying circuit 500 is connected to the power supply 800, so as to convert the ac power output by the power supply 800 into dc power and transmit the dc power to the motor 900 through the bus 100, so as to control parameters such as power, rotation speed and torque of the motor 900. The inverter circuit 600 converts the dc power output from the rectifier circuit 500 into ac power, thereby driving the motor 900.
The first capacitor 302, the second capacitor 304, the first control part 202, the second control part 204, the first control circuit 402, the second control circuit 404, and the diode 200 are provided between the rectifier circuit 500 and the inverter circuit 600.
Example nine:
the present embodiment provides a control apparatus, and in addition to the technical features of the above-described embodiments, further includes the following technical features.
The second capacitor 304 is a thin film capacitor.
In particular, the thin film capacitor may be a CBB capacitor (polypropylene capacitor) or other kind of thin film capacitor.
Example ten:
the present embodiment provides a control apparatus, and in addition to the technical features of the above-described embodiments, further includes the following technical features.
The power supply 800 may be a three-phase power supply or a single-phase power supply. The motor 900 may be a three-phase motor or a single-phase motor.
As shown in fig. 2 and 4, when the power supply 800 is a three-phase power supply, the rectifier circuit 500 is a three-phase rectifier circuit 500.
As shown in fig. 1, 3 and 5, when the power supply 800 is a single-phase power supply, the rectifier circuit 500 is a single-phase rectifier circuit 500.
As shown in fig. 1 and 5, when the motor 900 is a three-phase motor, the inverter circuit 600 is a three-phase inverter circuit, and the number of arms of the inverter circuit 600 is three.
As shown in fig. 6 and 7, when the motor 900 is a single-phase motor, the inverter circuit 600 is a single-phase inverter circuit, and the number of arms of the inverter circuit 600 is two.
Example eleven:
the present embodiment provides a control apparatus, and in addition to the technical features of the above-described embodiments, further includes the following technical features.
As shown in fig. 1 and 2, the at least two bus bars 100 include a positive bus bar 102 and a negative bus bar 104.
One contact of the first capacitor 302 is connected to the positive bus 102 via the first control member 202 and the diode 200, the first control member 202 is connected in parallel to the diode 200, and the other contact of the first capacitor 302 is connected to the negative bus 104.
Or one contact of the first capacitor 302 is connected with the negative bus 104 through the first control part 202 and the diode 200, the first control part 202 is connected with the diode 200 in parallel, and the other contact of the first capacitor 302 is connected with the positive bus 102.
One contact of the second capacitor 304 is connected to the positive bus 102 via the second control member 204, and the other contact of the second capacitor 304 is connected to the negative bus 104. Or one contact of the second capacitor 304 is connected to the negative bus 104 via the second control member 204 and the other contact of the second capacitor 304 is connected to the positive bus 102.
The diode 200 is conducted in a direction that the positive bus 102 conducts to the first capacitor 302, or from the first capacitor 302 to the negative bus 104.
Example twelve:
the present invention provides a laundry treating apparatus including the control apparatus according to any of the above embodiments, and thus the laundry treating apparatus includes all the advantageous effects of the control apparatus according to any of the above embodiments.
Specifically, when the laundry treatment device is in a washing mode, the control device needs to control the motor 900 to work at a low power, a low rotation speed and a high torque, the first control part 202 is turned on, the diode 200 is short-circuited by the first control part 202, and the capacitor 300 connected in series with the first control part 202 is charged and discharged, so that at least two capacitors 300 are connected in parallel, the total capacitance value of the capacitor 300 is increased while surge voltage is absorbed, the torque ripple of the motor 900 is reduced, the noise of the motor 900 during working is reduced, the noise of the laundry treatment device during laundry cleaning is reduced while the laundry treatment device is ensured to clean laundry, the noise pollution of the laundry treatment device to an indoor environment is reduced, and a user can obtain better experience. And, when the laundry treating apparatus is operated, the capacitor 300 connected in series with the first control part 202 and the diode 200 at the same time absorbs the surge voltage at the input side of the ac power supply, thereby ensuring that the laundry treating apparatus can satisfy the surge test requirements of the relevant standards, such as the IEC (International Electrotechnical Commission) standard or the surge test of the chinese national standard.
The motor 900 works with low power, specifically, the power of the motor 900 is less than or equal to 150W, the motor 900 works with low rotating speed, specifically, the rotating speed of the motor 900 is less than or equal to 600rpm, and the motor 900 works with high torque, specifically, the torque of the motor 900 is greater than or equal to 2 Nm.
When the laundry treating apparatus is in the dehydration mode, the control device needs to control the motor 900 to work with high power, high rotation speed and low torque,
the first control component 202 is disconnected, the diode 200 prevents the capacitor 300 connected with the diode 200 in series from charging and discharging, and the control device works in a small-capacitor/electrolytic-capacitor-free working mode while absorbing surge voltage, so that the input power factor of the control device can be improved, the input current harmonic wave can be reduced, and the pollution of the control device to a power grid can be reduced. And when the motor 900 works at high power, high rotating speed and low torque, the capacitor 300 connected in series with the diode 200 is not charged or discharged, so that the use frequency of the capacitor 300 connected in series with the diode 200 is reduced, the service life of the capacitor 300 connected in series with the diode 200 is prolonged, and the use cost of the control device is reduced.
The motor 900 works with high power, specifically, the power of the motor 900 is more than or equal to 600W, the motor 900 works with high rotating speed, specifically, the rotating speed of the motor 900 is more than or equal to 1500rpm, and the motor 900 works with low torque, specifically, the torque of the motor 900 is less than or equal to 0.5 Nm.
In the claims, the specification and the drawings of the specification of the present invention, the term "plurality" means two or more, unless explicitly defined otherwise, the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings only for the purpose of describing the present invention more conveniently and simplifying the description, and do not indicate or imply that the referred device or element must have the described specific orientation, be constructed and operated in the specific orientation, and thus the description should not be construed as limiting the present invention; the terms "connect," "mount," "secure," and the like are to be construed broadly, and for example, "connect" may refer to a fixed connection between multiple objects, a removable connection between multiple objects, or an integral connection; the multiple objects may be directly connected to each other or indirectly connected to each other through an intermediate. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art from the above data specifically.
In the claims, specification, and drawings that follow the present disclosure, the description of the terms "one embodiment," "some embodiments," "specific embodiments," and so forth, 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 present disclosure. In the claims, specification and drawings of the present invention, schematic representations of the above terms 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 (10)
1. A control device for controlling a motor, the control device comprising:
a diode;
the at least two bus bars are used for being connected with the motor;
the first control component is connected with the diode in parallel, and the first control component and one end of the diode are simultaneously connected with one of the at least two buses;
one end of one of the at least two capacitors is connected with the first control component and the other end of the diode at the same time, the other end of the one of the at least two capacitors is connected with the other bus of the at least two buses, and two ends of the other capacitor of the at least two capacitors are connected with the at least two buses respectively.
2. The control device according to claim 1, characterized by further comprising:
the first control circuit is connected with the first control component so as to control the first control component to be switched on or switched off according to the running state of the motor.
3. The control device of claim 1, wherein the at least two capacitors comprise:
one end of the first capacitor is connected with the first control part and the diode at the same time, and the other end of the first capacitor is connected with the other bus of the at least two buses;
and two ends of the second capacitor are respectively connected with the at least two buses.
4. The control device according to claim 3,
the capacitance value of the first capacitor is larger than that of the second capacitor.
5. The control device according to claim 3,
the capacitance value of the first capacitor is less than or equal to 100 mu F;
the capacitance value of the second capacitor is less than or equal to 10 mu F.
6. The control device according to claim 3, characterized by further comprising:
and one end of the second control component is connected with one of the at least two buses, and the other end of the second control component is connected with the second capacitor.
7. The control device according to claim 6, characterized by further comprising:
and the second control circuit is connected with the second control component so as to control the second control component to be switched on or switched off.
8. The control device according to any one of claims 1 to 7, characterized by further comprising:
the rectifying circuit is used for connecting a power supply at one side and is connected with the at least two buses at the other side;
the inverter circuit is connected with the at least two buses;
the motor is connected with the inverter circuit.
9. The control device according to claim 3,
the second capacitor is a thin film capacitor.
10. A laundry treatment apparatus, characterized by comprising a control apparatus according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110276457.5A CN112981861B (en) | 2021-03-15 | 2021-03-15 | Control device and clothes treatment device |
| PCT/CN2021/117733 WO2022193574A1 (en) | 2021-03-15 | 2021-09-10 | Control apparatus and laundry treating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110276457.5A CN112981861B (en) | 2021-03-15 | 2021-03-15 | Control device and clothes treatment device |
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| CN112981861A true CN112981861A (en) | 2021-06-18 |
| CN112981861B CN112981861B (en) | 2022-11-08 |
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| WO2022193574A1 (en) * | 2021-03-15 | 2022-09-22 | 广东威灵电机制造有限公司 | Control apparatus and laundry treating apparatus |
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