WO2022193574A1

WO2022193574A1 - Control apparatus and laundry treating apparatus

Info

Publication number: WO2022193574A1
Application number: PCT/CN2021/117733
Authority: WO
Inventors: 秦向南; 葛森; 陈辉; 付俊永
Original assignee: 广东威灵电机制造有限公司; 美的威灵电机技术（上海）有限公司
Priority date: 2021-03-15
Filing date: 2021-09-10
Publication date: 2022-09-22

Abstract

A control apparatus and a laundry treating apparatus. The control apparatus is used for controlling a motor (900). The control apparatus comprises at least two buses (100), a first control component (202), and at least two capacitors (300). The at least two buses (100) are used for being connected to the motor (900). One end of the first control component (202) is connected to one bus (100) of the at least two buses (100). One end of one capacitor (300) of the at least two capacitors (300) is connected to the other end of the first control component (202); the other end of the capacitor (300) is connected to the other bus (100) of the at least two buses (100); and both ends of the other capacitor (300) of the at least two capacitors (300) are connected to the at least two buses (100), respectively. When the motor (900) is driven by the control apparatus, the first control component (202) can control whether the capacitor (300), connected in series to the first control component (202), of the at least two capacitors (300) is connected to the control apparatus, thereby reducing system low-frequency noise caused by torque ripple of the control apparatus.

Description

Control device and laundry treatment device

This application claims the priority of the Chinese patent application with the application number "202110276454.1" and the invention title "Control Device and Clothes Treatment Device" filed with the China Patent Office on March 15, 2021, the entire contents of which are incorporated herein by reference middle.

This application claims the priority of the Chinese patent application with the application number "202110276457.5" and the invention title "Control Device and Clothes Treatment Device" filed with the China Patent Office on March 15, 2021, the entire contents of which are incorporated herein by reference middle.

technical field

The present application relates to the technical field of motor control, and in particular, to a control device and a clothes treatment device.

Background technique

At present, in the related art, motor controllers using small bus capacitors and no electrolytic capacitors have been applied to control motors because of their small size, long life, and high power factor. However, when the motor is in the working state of low power, low speed and high torque, the torque ripple of the small bus capacitor or the motor controller without electrolytic capacitor will cause the low frequency noise of the system.

SUMMARY OF THE INVENTION

The present application aims to solve at least one of the technical problems existing in the prior art or related technologies.

To this end, a first aspect of the present application provides a control device.

A second aspect of the present application provides a control device.

A third aspect of the present application provides a laundry treatment device.

In view of this, a first aspect of the present application provides a control device, the control device is used to control a motor, the control device includes at least two bus bars, a first control component and at least two capacitors; the at least two bus bars are used for connecting with the motor one end of the first control part is connected to one of the at least two bus bars; one end of one of the at least two capacitors is connected to the other end of the first control part, and the other end is connected to one of the at least two bus bars The other busbar of the at least two capacitors is connected to the at least two busbars.

The control device provided by the present application includes at least two bus bars and at least two capacitors. One side of the at least two bus bars can be connected to a power source, and the other side of the at least two bus bars can be connected to a motor to supply power to the motor. At least two capacitors are connected in parallel, and one of the at least two capacitors is connected to one of the at least two bus bars through the first control component. When the motor is driven by the control device, the first control part can control whether the capacitor connected in series with the first control part of the at least two capacitors is connected to the control device, thereby reducing the low-frequency noise of the system caused by the torque ripple of the control device.

Specifically, when the control device controls the motor to work with low power, low speed and high torque, the first control part is turned on, and the capacitor connected in series with the first control part is connected to the control device, so that at least two capacitors are connected in parallel to increase the capacitance The total capacitance value of the motor can reduce the torque ripple of the motor, thereby reducing the noise of the motor during operation.

The motor works with low power, specifically, the power of the motor is less than or equal to 150W (Watts), the motor works at low speed, the speed of the motor is less than or equal to 600rpm (revolution/min), and the motor works with high torque. The torque of the motor is greater than or equal to 2Nm (Newton-meter).

When the control device controls the motor to work with high power, high speed and low torque, the first control part is disconnected, the capacitor connected in series with the first control part is not connected to the control device, and the total capacitance value of the capacitor is reduced, and the control device works in The small capacitor/no electrolytic capacitor working mode can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. And when the motor works with high power, high speed and low torque, the capacitor connected in series with the first control part is not connected to the control device, reducing the frequency of use of the capacitor connected in series with the first control part, and increasing the frequency of the capacitor connected in series with the first control part. The service life of the capacitor, thereby reducing the use cost of the control device.

When the motor works with high power, the power of the motor is greater than or equal to 600W. When the motor works at high speed, the speed of the motor is greater than or equal to 1500rpm. When the motor works with small torque, the torque of the motor is less than or equal to 0.5Nm.

In addition, the control device in the above-mentioned technical solution provided by the present application may also have the following additional technical features:

In a technical solution of the present application, the control device further includes a first control circuit, and the first control circuit is connected to the first control component to control the first control component to be turned on or off according to the operating state of the motor.

In this technical solution, the first control circuit is connected to the first control component, and can control the first control component to switch between on and off, thereby realizing the control of the first control component. The first control part is controlled to be turned on or off according to the operating state of the motor, so that at least two capacitors can be connected to or disconnected from the control device according to the working needs of the motor, and the total capacitance value can be changed according to the working state of the motor to avoid a fixed total capacitance. The value cannot adapt to the multiple working states of the motor, thereby reducing the noise of the motor and improving the service life of the capacitor.

Specifically, when the control device controls the motor to work with low power, low speed and high torque, the first control circuit controls the first control component to be turned on. When the control device controls the motor to work with high power, high speed and low torque, the first control circuit controls the first control part to be disconnected, so that at least two capacitors can be connected or disconnected from the control device according to the needs of the motor, and the total capacitance value can be Change according to the working state of the motor.

The first control component may be an electronic switch tube or a mechanical switch, and the first control circuit may be a main control board or a separate control circuit.

When the first control circuit is the main control board, it controls the first control component to be turned on while controlling the motor to work with low power, low speed and high torque.

When the first control circuit is a separate control circuit, the main control board controls the control device, so that the control device controls the motor to work with low power, low speed and high torque, and at the same time, sends a control command to the first control circuit, so that the first control The circuit controls the first control part to be turned on.

In a technical solution of the present application, the at least two capacitors include a first capacitor and a second capacitor; one end of the first capacitor is connected to the first control component, and the other end is connected to the other of the at least two bus bars; Two ends of the second capacitor are respectively connected with at least two bus bars.

In this technical solution, the first capacitor is connected in series with the first control part, and the first capacitor is connected to one of the at least two bus bars through the first control part, so that the first control part can control the access control of the first capacitor device, or not connected to the control device, so as to realize the control of the first capacitor.

In a technical solution of the present application, the capacitance of the first capacitor is greater than the capacitance of the second capacitor.

In this technical solution, the capacitance value of the first capacitor is greater than the capacitance value of the second capacitor. When the control device controls the motor to work with low power, low speed and high torque, the first control component is turned on, and the first capacitor is connected to the control Therefore, the total capacitance value is larger to effectively reduce the torque ripple of the motor, thereby reducing the noise of the motor during operation. When the control device controls the motor to work with high power, high speed and small torque, the first control part is disconnected, the first capacitor is not connected to the control device, and the control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the control device. Input power factor, reduce input current harmonics, and reduce the pollution of the control device to the power grid. In addition, the use frequency of the first capacitor can be reduced, the requirement on the service life of the first capacitor can be reduced, the cost of the first capacitor can be reduced, and the cost of the control device can be further reduced.

In a technical solution of the present application, the capacitance of the first capacitor is less than or equal to 100 μF; the capacitance of the second capacitor is less than or equal to 10 μF.

In this technical solution, the capacitance value of the first capacitor is less than or equal to 100 μF. When the first capacitor is connected to the control device, the total capacitance value can be effectively increased, thereby reducing the torque ripple of the motor, thereby reducing the operating time of the motor. noise. The capacitance value of the second capacitor is less than or equal to 10μF. When the first capacitor is disconnected from the control device, the control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the input current harmonics, and reduce the control device. pollution to the power grid.

Since 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, and the space occupied by the control device is reduced, which is beneficial to the control device. miniaturization. In addition, since the capacitance values of the first capacitor and the second capacitor are reduced, the cost of the first capacitor and the second capacitor can also be reduced, thereby reducing the cost of the control device.

Specifically, the second capacitor is a thin film capacitor.

Specifically, the film capacitors are CBB capacitors (polypropylene capacitors) or other forms of film capacitors.

In a technical solution of the present application, 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 bus bars, and the other end is connected to the second capacitor.

In this technical solution, the second capacitor is connected to one of the at least two bus bars through the second control component, so that the second control component can control the second capacitor to be connected to or disconnected from the control device, thereby improving the control of the second capacitor. Flexibility, so that the second capacitor can be connected to the control device according to the working needs of the motor and the control device.

Specifically, when the at least two capacitors include two capacitors, namely the first capacitor and the second capacitor, the control device controls the motor to work with low power, low speed and high torque, the first control component is turned on, and the first capacitor is connected control device, the second control part is turned on, and the second capacitor is connected to the control device, so that the first capacitor and the second capacitor are connected in parallel, the total capacitance value of the capacitor is increased, the torque ripple of the motor is reduced, and the motor is in operation. noise.

The control device controls the motor to work with high power, high speed and small torque, the first control part is disconnected, the first capacitor is not connected to the control device, the second control part is turned on, the second capacitor is connected to the control device, and the control device works in The small capacitor/no electrolytic capacitor working mode can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. And when the motor works with high power, high speed and low torque, the first capacitor is not connected to the control device, which reduces the use frequency of the first capacitor, increases the service life of the first capacitor, and reduces the use cost of the control device.

When the at least two capacitors include three capacitors or more, that is, the at least two capacitors include at least one third capacitor, the control device controls the motor to work with low power, low speed and high torque, the first control component is turned on, and the first control unit is turned on. A capacitor is connected to the control device, the second control component is turned on, and the second capacitor is connected to the control device, thereby connecting the first capacitor, the second capacitor and at least one third capacitor in parallel, increasing the total capacitance of the capacitors and reducing the motor's Torque ripple, thereby reducing the noise of the motor during operation.

The control device controls the motor to work with high power, high speed and low torque, the second control part is turned on, the second capacitor is connected to the control device, the first control part is disconnected, the first capacitor is not connected to the control device, and the third control part When disconnected, the third capacitor is not connected to the control device. The control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. And when the motor works with high power, high speed and small torque, the first capacitor and the third capacitor are not connected to the control device, which reduces the use frequency of the first capacitor and the third capacitor, and improves the use of the first capacitor and the third capacitor. life, thereby reducing the cost of use of the control device.

The second control component may be an electronic switch tube or a mechanical switch, and the second control circuit may be a main control board or a separate control circuit.

In a technical solution of the present application, the control device further includes a second control circuit, and the second control circuit is connected to the second control component to control the conduction or disconnection of the second control component.

In this technical solution, the second control circuit is connected to the second control component, and can control the second control component to switch between on and off, thereby realizing the control of the second control component.

In a technical solution of the present application, the control device further includes a rectifier circuit and an inverter circuit. One side of the rectifier circuit is used to connect the power supply, and the other side is connected to at least two bus bars; the inverter circuit is connected to the at least two bus bars. ; The motor is connected to the inverter circuit.

In this technical solution, the rectifier circuit is connected with the power supply, and then converts the alternating current output from the power supply into direct current, and transmits it to the motor through the bus bar, so as to control the parameters such as the power, speed and torque of the motor. The inverter circuit converts the DC power output by the rectifier circuit into AC power, and then realizes the drive of the motor.

The first capacitor, the second capacitor, the first control part, the second control part, the first control circuit and the second control circuit are arranged between the rectifier circuit and the inverter circuit.

In a technical solution of the present application, the power supply may 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 rectifier circuit is a three-phase rectifier circuit.

When the power supply is a single-phase power supply, the rectifier circuit is a single-phase rectifier 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 groups.

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 groups.

In a technical solution of the present application, the at least two bus bars include a positive bus bar and a negative bus bar.

One contact of the first capacitor is connected to the positive busbar through the first control component, and the other contact of the first capacitor is connected to the negative busbar. Or one contact of the first capacitor is connected to the negative bus bar through the first control component, and the other contact of the first capacitor is connected to the positive bus bar.

One contact of the second capacitor is connected to the positive busbar through the second control component, and the other contact of the second capacitor is connected to the negative busbar. Or one contact of the second capacitor is connected to the negative bus bar through the second control component, and the other contact of the second capacitor is connected to the positive bus bar.

A second aspect of the present application provides a control device, the control device is used to control a motor, and the control device includes: at least two bus bars, a diode, a first control component and at least two capacitors; the at least two bus bars are used for phase-connecting with the motor. The first control part is connected in parallel with the diode, and one end of the first control part and the diode is connected to one of the at least two bus bars at the same time; one end of one of the at least two capacitors is connected to the first control part and the diode at the same time. The other end is connected, the other end is connected with the other one of the at least two busbars, and the two ends of the other capacitor among the at least two capacitors are respectively connected with the at least two busbars.

The control device provided by the present application includes at least two bus bars and at least two capacitors. One side of the at least two bus bars can be connected to a power source, and the other side of the at least two bus bars can be connected to a motor to supply power to the motor. At least two capacitors are connected in parallel, and one of the at least two capacitors is connected to one of the at least two bus bars through a first control part, and a diode is connected in parallel with the first control part.

When the driving motor is working, the capacitor connected in series with the first control component and the diode can absorb the surge voltage on the input side of the AC power supply to ensure that the control device and the motor 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 connected in series with the first control component and the diode, so that the motor can more easily meet the surge test requirements of the IEC (International Electrotechnical Commission, International Electrotechnical Commission) standard or the Chinese national standard.

And when the motor is driven by the control device, the first control part can control whether the capacitors connected in series with the first control part and the diode in the at least two capacitors are charged and discharged at the same time, and when the first control part is turned on, the diode is short-circuited, and simultaneously with The capacitor connected in series with the first control component and the diode is charged and discharged, thereby reducing the low-frequency noise of the system caused by the torque ripple of the control device. 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 being charged and discharged at the same time, preventing the voltage ripple and current ripple of the capacitor connected in series with the first control part and the diode simultaneously when the control device works The wave exceeds the standard, so as to realize the protection of the capacitor connected in series with the first control part and the diode at the same time.

Specifically, when the control device controls the motor to work with low power, low speed and high torque, the first control part is turned on, the first control part short-circuits the diode, and the capacitor connected in series with the first control part is charged and discharged, so that at least When two capacitors are connected in parallel, while absorbing the surge voltage, the total capacitance of the capacitors is increased, the torque ripple of the motor is reduced, and the noise of the motor during operation is reduced.

When the control device controls the motor to work with high power, high speed and small torque, the first control part is disconnected, the diode prevents the capacitor connected in series with the diode from being charged and discharged, and the total capacitance value of the capacitor is reduced while absorbing the surge voltage. The control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. And when the motor is working with high power, high speed and low torque, the capacitor connected in series with the diode will not be charged and discharged, which reduces the frequency of use of the capacitor connected in series with the diode, increases the service life of the capacitor connected in series with the diode, and reduces the control device. cost of use.

In this technical solution, the first control circuit is connected to the first control component, and can control the first control component to switch between on and off, thereby realizing the control of the first control component. The first control part is controlled to be turned on or off according to the operating state of the motor, so that at least two capacitors can be charged and discharged according to the working needs of the motor, and the total capacitance value can be changed according to the working state of the motor, so as to avoid the fixed total capacitance value that cannot be adapted Multiple working states of the motor, thereby reducing the noise of the motor and improving the service life of the capacitor.

Specifically, when the control device controls the motor to work with low power, low speed and high torque, the first control circuit controls the first control component to be turned on. When the control device controls the motor to work with high power, high 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 needs of the motor, and the total capacitance value can be The working status is changed.

In a technical solution of the present application, the at least two capacitors include a first capacitor and a second capacitor; one end of the first capacitor is connected to the first control component and the diode at the same time, and the other end is connected to the other of the at least two bus bars. The two ends of the second capacitor are respectively connected with at least two bus bars.

In this technical solution, 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 to one of the at least two bus bars through the first control component or the diode. are connected, so that the first control component can control whether the first capacitor is charged or discharged, thereby realizing the control of the first capacitor.

In this technical solution, the capacitance value of the first capacitor is greater than the capacitance value of the second capacitor. When the control device controls the motor to work with low power, low speed and high torque, the first control component is turned on, and the first capacitor is charged and discharged. , and while absorbing the surge voltage, the total capacitance value is made larger to effectively reduce the torque ripple of the motor, thereby reducing the noise of the motor during operation. When the control device controls the motor to work with high power, high speed and small torque, the first control part is disconnected, the first capacitor is not charged and discharged, and the control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the input of the control device. Power factor, reduce input current harmonics, and reduce the pollution of the control device to the power grid. In addition, the use frequency of the first capacitor can be reduced while the surge voltage is absorbed, the requirement on the service life of the first capacitor can be reduced, the cost of the first capacitor can be reduced, and the cost of the control device can be further reduced.

In this technical solution, the capacitance value of the first capacitor is less than or equal to 100 μF. When the first capacitor is connected to the control device, the total capacitance value can be effectively increased, thereby reducing the torque ripple of the motor, thereby reducing the operating time of the motor. noise. The capacitance value of the second capacitor is less than or equal to 10μF. When the first capacitor is not charged and discharged, it is ensured that the motor can run stably in the state of high power, high speed and small torque, and the control device works in a small capacitor/no electrolysis. The capacitor working mode can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid.

Specifically, when the at least two capacitors include two capacitors, namely the first capacitor and the second capacitor, the control device controls the motor to work with low power, low speed and high torque, the first control component is turned on, and the first capacitor is charged. Discharge, the second control part is turned on, and the second capacitor is connected to the control device, so that the first capacitor and the second capacitor are connected in parallel. While absorbing the surge voltage, the total capacitance value of the capacitor is increased, and the torque ripple of the motor is reduced. , thereby reducing the noise of the motor during operation.

The control device controls the motor to work with high power, high speed and small torque, the first control part is disconnected, the first capacitor does not charge and discharge, the second control part is turned on, the second capacitor is connected to the control device, and absorbs the surge voltage. At the same time, the control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. And when the motor works with high power, high speed and low torque, the first capacitor is not connected to the control device, which reduces the use frequency of the first capacitor, increases the service life of the first capacitor, and reduces the use cost of the control device.

The control device controls the motor to work with high power, high speed and low torque, the second control part is turned on, the second capacitor is connected to the control device, the first control part is disconnected, the first capacitor is not connected to the control device, and the third control part Disconnected, the third capacitor is not connected to the control device, and the control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. And when the motor works with high power, high speed and small torque, the first capacitor and the third capacitor are not connected to the control device, which reduces the use frequency of the first capacitor and the third capacitor, and improves the use of the first capacitor and the third capacitor. life, thereby reducing the cost of use of the control device.

The first capacitor, the second capacitor, the first control part, the second control part, the first control circuit, the second control circuit and the diode are arranged between the rectifier circuit and the inverter circuit.

In a technical solution of the present application, the second capacitor is a film capacitor.

Specifically, the film capacitor may be a CBB capacitor (polypropylene capacitor) or other types of film capacitors.

One contact of the first capacitor is connected to the positive bus bar through the first control component and the diode, the first control component is connected in parallel with the diode, and the other contact of the first capacitor is connected to the negative bus bar.

Or one contact of the first capacitor is connected to the negative bus bar through the first control part and the diode, the first control part is connected in parallel with the diode, and the other contact of the first capacitor is connected to the positive bus bar.

The conduction direction of the diode is that the positive busbar conducts to the first capacitor, or the first capacitor conducts to the negative busbar.

A third aspect of the present application provides a clothes treatment device, including the control device according to at least one of the above technical solutions, so the clothes treatment device includes all the beneficial effects of the control device according to the above at least one technical solution.

Additional aspects and advantages of the present application will be set forth, in part, from the following description, and in part will become apparent from the following description, or may be learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

FIG. 1 shows a schematic circuit diagram of a control device according to an embodiment of the present application;

FIG. 2 shows a schematic circuit diagram of a control device according to another embodiment of the present application;

FIG. 3 shows a schematic circuit diagram of a control device according to still another embodiment of the present application;

FIG. 4 shows a schematic circuit diagram of a control device according to still another embodiment of the present application;

FIG. 5 shows a schematic circuit diagram of a control device according to still another embodiment of the present application;

FIG. 6 shows a schematic circuit diagram of a control device according to still another embodiment of the present application;

FIG. 7 shows a schematic circuit diagram of a control device according to still another embodiment of the present application;

FIG. 8 shows a schematic circuit diagram of a control device according to still another embodiment of the present application;

FIG. 9 shows a schematic circuit diagram of a control device according to still another embodiment of the present application;

FIG. 10 shows a schematic circuit diagram of a control device according to still another embodiment of the present application;

FIG. 11 shows a schematic circuit diagram of a control device according to still another embodiment of the present application;

FIG. 12 shows a schematic circuit diagram of a control device according to still another embodiment of the present application;

FIG. 13 shows a schematic circuit diagram of a control device according to still another embodiment of the present application.

Among them, the corresponding relationship between the reference numerals and the component names in Fig. 1 to Fig. 13 is:

100 busbar, 102 positive busbar, 104 negative busbar, 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, 800 power supply, 900 motor.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific details disclosed below. Example limitations.

A control apparatus and a laundry treating apparatus according to some embodiments of the present application are described below with reference to FIGS. 1 to 13 .

Example 1:

As shown in FIG. 1 , the present application provides a control device. The control device is used to control a motor 900 . The control device includes at least two bus bars 100 , a first control component 202 and at least two capacitors 300 ; the at least two bus bars 100 are used for one end of the first control part 202 is connected to one of the at least two bus bars 100; one end of one of the at least two capacitors 300 is connected to the other end of the first control part 202 The other end is connected to the other bus bar 100 of the at least two bus bars 100 , and the two ends of the other capacitor 300 of the at least two capacitors 300 are respectively connected to the at least two bus bars 100 .

In this embodiment, the control device includes at least two bus bars 100 and at least two capacitors 300 . One side of the at least two bus bars 100 can be connected to the power source 800 and the other side can be connected to the motor 900 to supply power to the motor 900 . At least two capacitors 300 are connected in parallel, and one of the at least two capacitors 300 is connected to one of the at least two bus bars 100 through the first control part 202 . When the motor 900 is driven by the control device, the first control part 202 can control whether the capacitor 300 in series with the first control part 202 of the at least two capacitors 300 is connected to the control device, thereby reducing the low frequency of the system caused by the torque ripple of the control device noise.

Specifically, when the control device controls the motor 900 to work with low power, low speed and high torque, the first control part 202 is turned on, and the capacitor 300 connected in series with the first control part 202 is connected to the control device, thereby making at least two capacitors 300 are connected in parallel to increase the total capacitance of the capacitor 300, reduce the torque ripple of the motor 900, and further reduce the noise of the motor 900 during operation.

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 at a low speed, the speed of the motor 900 is less than or equal to 600rpm, and the motor 900 works with a large torque, specifically, the torque of the motor 900 is greater than or equal to 2Nm.

When the control device controls the motor 900 to work with high power, high speed and low torque, the first control part 202 is disconnected, the capacitor 300 connected in series with the first control part 202 is not connected to the control device, and the control device works in the small capacitance/no The electrolytic capacitor working mode can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. In addition, when the motor 900 operates with high power, high speed and low torque, the capacitor 300 connected in series with the first control part 202 is not connected to the control device, thereby reducing the use frequency of the capacitor 300 connected in series with the first control part 202, and improving the connection with the first control part 202. A capacitor 300 connected in series with a control component 202 has a service life, thereby reducing the use cost of the control device.

The motor 900 works with high power, specifically, the power of the motor 900 is greater than or equal to 600W, the motor 900 works at a high speed, the speed of the motor 900 is greater than or equal to 1500rpm, and the motor 900 works with a small torque, specifically, the torque of the motor 900 is less than or equal to 0.5Nm .

Embodiment 2:

This embodiment provides a control device. In addition to the technical features of the foregoing embodiments, this embodiment further includes the following technical features.

As shown in FIG. 1 and FIG. 2 , the control device further includes a first control circuit 402 , and the first control circuit 402 is connected with the first control part 202 to control the first control part 202 to be turned on or off according to the operating state of the motor 900 open.

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, thereby realizing the control of the first control unit 202 . The first control part 202 is controlled to be turned on or off according to the operating state of the motor 900, so that at least two capacitors 300 can be connected to or disconnected from the control device according to the working needs of the motor 900, and the total capacitance value can be changed according to the working state of the motor 900, It is avoided that the fixed total capacitance value cannot adapt to multiple working states of the motor 900 , thereby reducing the noise of the motor 900 and improving the service life of the capacitor 300 .

Specifically, when the control device controls the motor 900 to work with low power, low speed and high torque, the first control circuit 402 controls the first control component 202 to be turned on. When the control device controls the motor 900 to work with high power, high speed, and low torque, the first control circuit 402 controls the first control component 202 to be disconnected, so that at least two capacitors 300 can be connected to or disconnected from the control device according to the needs of the motor 900 to work. , the total capacity value can be changed according to the working state of the motor 900 .

The first control component 202 may be an electronic switch tube 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 the main control board, it controls the first control component 202 to be turned on while controlling the motor 900 to work with low power, low speed and 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 work with low power, low speed and high torque, and at the same time, sends a control command to the first control circuit 402 to make the motor 900 work with low power, low speed and high torque. The first control circuit 402 controls the first control part 202 to be turned on.

Embodiment three:

As shown in FIG. 1 and FIG. 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 component 202 , and the other end is connected to the at least two bus bars 100 . Another bus bar 100 is connected; both ends of the second capacitor 304 are connected to at least two bus bars 100 respectively.

In this embodiment, the first capacitor 302 is connected in series with the first control part 202, and the first capacitor 302 is connected to one of the at least two bus bars 100 through the first control part 202, so that the first control part 202 can The first capacitor 302 is controlled to be connected to the control device, or not connected to the control device, so as to realize the control of the first capacitor 302 .

Embodiment 4:

The capacitance value of the first capacitor 302 is greater than the capacitance value of the second capacitor 304 .

In this embodiment, the capacitance value of the first capacitor 302 is greater than the capacitance value of the second capacitor 304. When the control device controls the motor 900 to work with low power, low speed and high torque, the first control part 202 is turned on, and the first control part 202 is turned on. The capacitor 302 is connected to the control device, so that the total capacitance value is larger, so as to effectively reduce the torque ripple of the motor 900, thereby reducing the noise of the motor 900 during operation. When the control device controls the motor 900 to work with high power, high speed, and low torque, the first control component 202 is disconnected, the first capacitor 302 is not connected to the control device, and the control device works in the low-capacitor/no electrolytic capacitor working mode. Improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. In addition, the use frequency of the first capacitor 302 with a larger capacitance value can be reduced, thereby prolonging the service life of the first capacitor 302, avoiding waste caused by an excessively large capacitance value, and further reducing the use cost of the control device.

In addition, since the use frequency of the first capacitor 302 is reduced, the requirement on the service life of the first capacitor 302 is reduced, and the cost of the first capacitor 302 can be reduced, thereby reducing the cost of the first control device.

Embodiment 5:

The capacitance of the first capacitor 302 is less than or equal to 100 μF; the capacitance of the second capacitor 304 is less than or equal to 10 μF.

In this embodiment, the capacitance value of the first capacitor 302 is less than or equal to 100 μF. When the first capacitor 302 is connected to the control device, the total capacitance value can be effectively increased, thereby reducing the torque ripple of the motor 900 and further reducing the motor 900 noise at work. The capacitance value of the second capacitor 304 is less than or equal to 10 μF. When the first capacitor 302 is disconnected from the control device, the control device operates in the small capacitor/no electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the Pollution of the power grid by the control device.

Since 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, and the space occupied by the control device is reduced. Conducive to the miniaturization of the control device. In addition, since 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 also be reduced, thereby reducing the cost of the control device.

Specifically, the second capacitor 304 is a thin film capacitor.

Embodiment 6:

As shown in FIGS. 3 and 4 , the control device further includes a second control part 204 , one end of the second control part 204 is connected to one of the at least two bus bars 100 , and the other end is connected to the second capacitor 304 .

In this embodiment, the second capacitor 304 is connected to one of the at least two bus bars 100 through the second control part 204, so that the second control part 204 can control the second capacitor 304 to be connected to or disconnected from the control device, so as to improve the The flexibility of the control of the second capacitor 304 enables the second capacitor 304 to be connected to the control device according to the working requirements of the motor 900 and the control device.

Specifically, when the at least two capacitors 300 include two capacitors, namely the first capacitor 302 and the second capacitor 304, the control device controls the motor 900 to work with low power, low speed and high torque, and the first control component 202 is turned on, The first capacitor 302 is connected to the control device, the second control component 204 is turned on, and the second capacitor 304 is connected to the control device, thereby connecting the first capacitor 302 and the second capacitor 304 in parallel, increasing the total capacitance value of the capacitor 300 and reducing the motor The torque ripple of the motor 900 is reduced, thereby reducing the noise of the motor 900 during operation.

The control device controls the motor 900 to work with high power, high speed and low torque, the first control part 202 is disconnected, the first capacitor 302 is not connected to the control device, the second control part 204 is turned on, and the second capacitor 304 is connected to the control device , reduce the total capacitance value of the capacitor 300, and the control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. In addition, when the motor 900 operates with high power, high speed and low torque, the first capacitor 302 is not connected to the control device, which reduces the use frequency of the first capacitor 302, increases the service life of the first capacitor 302, and reduces the operating time of the control device. The cost.

When the at least two capacitors 300 include three capacitors or more, that is, the at least two capacitors 300 include at least one third capacitor, the control device controls the motor 900 to work with low power, low speed and high torque, and the first control component 202 Turn on, the first capacitor 302 is connected to the control device, the second control part 204 is turned on, and the second capacitor 304 is connected to the control device, so that the first capacitor 302, the second capacitor 304 and at least one third capacitor are connected in parallel to increase the capacitance The total capacitance value of 300 reduces the torque ripple of the motor 900, thereby reducing the noise of the motor 900 during operation.

The control device controls the motor 900 to work with high power, high speed and small torque, the second control part 204 is turned on, the second capacitor 304 is connected to the control device, other capacitors are not connected to the control device, and the control device works in small capacitor/no electrolysis The capacitor working mode can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. In addition, when the motor 900 operates with high power, high speed and low torque, the first capacitor 302 and the third capacitor are not connected to the control device, the use frequency of the first capacitor 302 and the third capacitor is reduced, and the first capacitor 302 and the third capacitor are improved. The service life of the three capacitors, thereby reducing the use cost of the control device.

The second control component 204 may be an electronic switch tube or a mechanical switch, and the second control circuit 404 may be a main control board or a separate control circuit.

Embodiment 7:

As shown in FIG. 3 and FIG. 4 , the control device further includes a second control circuit 404 , and the second control circuit 404 is connected with the second control part 204 to control the conduction or disconnection of the second control part 204 .

In this embodiment, the second control circuit 404 is connected to the second control part 204 , and can control the second control part 204 to switch between on and off, thereby realizing the control of the second control part 204 .

Embodiment 8:

As shown in FIG. 5 and FIG. 6 , the control device further includes a rectifier circuit 500 and an inverter circuit 600. One side of the rectifier circuit 500 is used to connect the power supply 800, and the other side is connected to at least two bus bars 100; the inverter circuit 600 is connected to the power supply 800. At least two bus bars 100 are connected; the motor 900 is connected with the inverter circuit 600 .

In this embodiment, the rectifier circuit 500 is connected to the power source 800 , and then converts the alternating current output from the power source 800 into direct current, and transmits it to the motor 900 through the bus bar 100 , so as to facilitate the adjustment of parameters such as power, rotational speed and torque of the motor 900 . control. The inverter circuit 600 converts the DC power output by the rectifier circuit 500 into AC power, and then drives the motor 900 .

As shown in FIG. 5 and FIG. 6 , the first capacitor 302 , the second capacitor 304 , the first control part 202 , the second control part 204 , the first control circuit 402 and the second control circuit 404 are provided in the rectifier circuit 500 and the inverter between circuits 600 .

Embodiment 9:

The power source 800 may be a three-phase power source or a single-phase power source. The motor 900 may be a three-phase motor or a single-phase motor.

As shown in FIG. 5 , when the power source 800 is a three-phase power source, the rectifier circuit 500 is a three-phase rectifier circuit.

As shown in FIGS. 1 and 2 , when the power source 800 is a single-phase power source, the rectifier circuit 500 is a single-phase rectifier circuit.

As shown in FIGS. 1 and 2 , when the motor 900 is a three-phase motor, the inverter circuit 600 is a three-phase inverter circuit, and the number of bridge arms of the inverter circuit 600 is three groups.

As shown in FIG. 4 and FIG. 6 , when the motor 900 is a single-phase motor, the inverter circuit 600 is a single-phase inverter circuit, and the number of bridge arms of the inverter circuit 600 is two groups.

Embodiment ten:

As shown in FIG. 1 , the at least two bus bars 100 include a positive bus bar 102 and a negative bus bar 104 .

As shown in FIG. 1 and FIG. 3 , one contact of the first capacitor 302 is connected to the negative bus bar 104 through the first control component 202 , and the other contact of the first capacitor 302 is connected to the positive bus 102 .

As shown in FIGS. 2 and 4 , one contact of the first capacitor 302 is connected to the positive bus bar 102 through the first control component 202 , and the other contact of the first capacitor 302 is connected to the negative bus 104 .

As shown in FIG. 3 , one contact of the second capacitor 304 is connected to the negative bus bar 104 through the second control component 204 , and the other contact of the second capacitor 304 is connected to the positive bus bar 102 .

As shown in FIG. 4 , one contact of the second capacitor 304 is connected to the positive bus bar 102 through the second control component 204 , and the other contact of the second capacitor 304 is connected to the negative bus 104 .

Embodiment eleven:

As shown in FIG. 7 and FIG. 8 , the present application provides a control device, the control device is used to control the motor 900 , and the control device includes: at least two bus bars 100 , a diode 200 , a first control part 202 and at least two capacitors 300 ; At least two bus bars 100 are used to connect with the motor 900; the first control part 202 is connected in parallel with the diode 200, and one end of the first control part 202 and the diode 200 is connected to one of the at least two bus bars 100 at the same time; at least One end of one capacitor 300 of the two capacitors 300 is connected to the other end of the first control component 202 and the diode 200 at the same time, and the other end is connected to the other bus bar 100 of the at least two bus bars 100 . Two ends of the other capacitor 300 are respectively connected with at least two bus bars 100 .

In this embodiment, the control device includes at least two bus bars 100 and at least two capacitors 300 . One side of the at least two bus bars 100 can be connected to the power source 800 and the other side can be connected to the motor 900 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 of the at least two bus bars 100 through the first control part 202 , and the diode 200 is connected to the first control part 202 in parallel.

When the motor 900 is driven, 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 AC power supply, ensuring 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 with the first control component 202 and the diode 200 at the same time, so that the motor 900 can more easily meet the surge voltage of the IEC (International Electrotechnical Commission, International Electrotechnical Commission) standard or the Chinese national standard. surge test requirements.

And when the motor 900 is driven by the control device, the first control part 202 can control whether the capacitor 300 in the at least two capacitors 300 connected in series with the first control part 202 and the diode 200 at the same time is charged and discharged, when the first control part 202 is turned on. , the diode 200 is short-circuited, and at the same time, the capacitor 300 connected in series with the first control component 202 and the diode 200 is charged and 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, preventing the capacitor 300 connected in series with the first control part 202 and the diode 200 at the same time when the control device works The voltage ripple and current ripple of 300 exceed the standard, so as to realize the protection of the capacitor 300 connected in series with the first control part 202 and the diode 200 at the same time.

Specifically, when the control device controls the motor 900 to work with low power, low speed and high torque, the first control part 202 is turned on, the first control part 202 short-circuits the diode 200, and the capacitor 300 connected in series with the first control part 202 conducts Charge and discharge, and then connect at least two capacitors 300 in parallel, while absorbing the surge voltage, the total capacitance 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 motor 900 works with low power, specifically, the power of the motor 900 is less than or equal to 150W (Watts), the motor 900 works at a low speed, and the motor 900 works with a rotation speed of less than or equal to 600rpm (revolution/min), and the motor 900 works with a large torque. The torque of 900 is greater than or equal to 2Nm (Nm).

When the control device controls the motor 900 to work with high power, high speed and low torque, the first control part 202 is disconnected, the diode 200 prevents the capacitor 300 connected in series with the diode 200 from being charged and discharged, and reduces the capacitance while absorbing the surge voltage The total capacitance value of 300, the control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. And when the motor 900 is working with high power, high speed and low torque, the capacitor 300 connected in series with the diode 200 will not be charged and discharged, reducing the use frequency of the capacitor 300 connected in series with the diode 200, and improving the use of the capacitor 300 connected in series with the diode 200. life, thereby reducing the cost of use of the control device.

Embodiment 12:

As shown in FIG. 9 and FIG. 10 , the control device further includes a first control circuit 402 , and the first control circuit 402 is connected with the first control part 202 to control the first control part 202 to be turned on or off according to the operating state of the motor 900 open.

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, thereby realizing the control of the first control unit 202 . The first control part 202 is controlled to be turned on or off according to the operating state of the motor 900 , so that at least two capacitors 300 can be charged and discharged according to the working needs of the motor 900 , and the total capacitance value can be changed according to the working state of the motor 900 to avoid fixed The total capacitance value cannot adapt to multiple working states of the motor 900 , thereby reducing the noise of the motor 900 and increasing the service life of the capacitor 300 .

Specifically, when the control device controls the motor 900 to work with low power, low speed and high torque, the first control circuit 402 controls the first control component 202 to be turned on. When the control device controls the motor 900 to work with high power, high speed, and low torque, the first control circuit 402 controls the first control component 202 to be disconnected, so that at least two capacitors 300 can be charged and discharged according to the work requirements of the motor 900, and the total capacity The value may be changed according to the operating state of the motor 900 .

Embodiment thirteen:

As shown in FIG. 7 and FIG. 8 , 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 component 202 and the diode 200 at the same time, and the other end is connected to the at least two capacitors Another bus bar 100 in the bus bars 100 is connected; two ends of the second capacitor 304 are respectively connected with at least two bus bars 100 .

In this embodiment, the first capacitor 302 is connected in series with the first control part 202 , the first capacitor 302 is connected in series with the diode 200 , the diode 200 is connected in parallel with the first control part 202 , and the first capacitor 302 passes through the first control part 202 or the diode 200 It is connected to one of the at least two bus bars 100 , so that the first control component 202 can control whether the first capacitor 302 is charged or discharged, thereby realizing the control of the first capacitor 302 .

Embodiment fourteen:

In this embodiment, the capacitance value of the first capacitor 302 is greater than the capacitance value of the second capacitor 304. When the control device controls the motor 900 to work with low power, low speed and high torque, the first control part 202 is turned on, and the first control part 202 is turned on. The capacitor 302 is charged and discharged, so as to absorb the surge voltage, and at the same time, make the total capacitance larger to effectively reduce the torque ripple of the motor 900 , thereby reducing the noise of the motor 900 during operation. When the control device controls the motor 900 to work with high power, high speed and low torque, the first control part 202 is disconnected, the first capacitor 302 is not charged and discharged, and the control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the Control the input power factor of the device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. In addition, the use frequency of the first capacitor 302 can be reduced while absorbing the surge voltage.

The requirement on the service life of the first capacitor 302 is reduced, and the cost of the first capacitor 302 can be reduced, thereby reducing the cost of the first control device.

Embodiment fifteen:

In this embodiment, the capacitance value of the first capacitor 302 is less than or equal to 100 μF. When the first capacitor 302 is connected to the control device, the total capacitance value can be effectively increased, thereby reducing the torque ripple of the motor 900 and further reducing the motor 900 noise at work. The capacitance value of the second capacitor 304 is less than or equal to 10 μF. When the first capacitor 302 is not charged and discharged, it is ensured that the motor 900 can run stably under the state of high power, high speed and low torque, and the control device works with a small capacitor. /No electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid.

Embodiment sixteen:

As shown in FIG. 9 and FIG. 10 , the control device further includes a second control part 204 , one end of the second control part 204 is connected to one of the at least two bus bars 100 , and the other end is connected to the second capacitor 304 .

Specifically, as shown in FIG. 7 and FIG. 8 , when the at least two capacitors 300 include two capacitors, namely the first capacitor 302 and the second capacitor 304 , the control device controls the motor 900 to work with low power, low speed and high torque , the first control part 202 is turned on, the first capacitor 302 is charged and discharged, the second control part 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. At the same time of the surge voltage, 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 with high power, high speed and low torque, the first control part 202 is disconnected, the first capacitor 302 is not charged and discharged, the second control part 204 is turned on, and the second capacitor 304 is connected to the control device, While absorbing the surge voltage, the control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. In addition, when the motor 900 operates with high power, high speed and low torque, the first capacitor 302 is not connected to the control device, which reduces the use frequency of the first capacitor 302, increases the service life of the first capacitor 302, and reduces the operating time of the control device. The cost.

When at least two capacitors 300 include three capacitors 300 or more capacitors 300, that is, when at least two capacitors 300 include at least one third capacitor 300, the control device controls the motor 900 to work with low power, low speed and high torque, and the first The control part 202 is turned on, the first capacitor 302 is connected to the control device, the second control part 204 is turned on, and the second capacitor 304 is connected to the control device, thereby making the first capacitor 302, the second capacitor 304 and at least one third capacitor 300 In parallel, 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 with high power, high speed and low torque, the second control part 204 is turned on, the second capacitor 304 is connected to the control device, the first control part 202 is disconnected, and the first capacitor 302 is not connected to the control device , the third control part is disconnected, the third capacitor is not connected to the control device, and the control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the impact of the control device on the power grid. pollution. In addition, when the motor 900 operates with high power, high speed and low torque, the first capacitor 302 and the third capacitor are not connected to the control device, the use frequency of the first capacitor 302 and the third capacitor is reduced, and the first capacitor 302 and the third capacitor are improved. The service life of the three capacitors, thereby reducing the use cost of the control device.

Embodiment seventeen:

As shown in FIG. 9 and FIG. 10 , the control device further includes a second control circuit 404 , which is connected to the second control part 204 to control the conduction or disconnection of the second control part 204 .

Embodiment 18:

As shown in FIG. 7 and FIG. 8 , the control device further includes a rectifier circuit 500 and an inverter circuit 600. One side of the rectifier circuit 500 is used to connect the power supply 800, and the other side is connected to at least two bus bars 100; the inverter circuit 600 is connected to the power supply 800. At least two bus bars 100 are connected; the motor 900 is connected with the inverter circuit 600 .

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 disposed between the rectifier circuit 500 and the inverter circuit 600 .

Embodiment nineteen:

The second capacitor 304 is a thin film capacitor.

Embodiment 20:

As shown in FIGS. 8 and 10 , when the power source 800 is a three-phase power source, the rectifier circuit 500 is a three-phase rectifier circuit.

As shown in FIGS. 7 , 9 and 11 , when the power source 800 is a single-phase power source, the rectifier circuit 500 is a single-phase rectifier circuit.

As shown in FIG. 7 and FIG. 11 , when the motor 900 is a three-phase motor, the inverter circuit 600 is a three-phase inverter circuit, and the number of bridge arms of the inverter circuit 600 is three groups.

As shown in Fig. 12 and Fig. 13 , when the motor 900 is a single-phase motor, the inverter circuit 600 is a single-phase inverter circuit, and the number of bridge arms of the inverter circuit 600 is two groups.

Embodiment 21:

As shown in FIGS. 7 and 8 , 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 bar 102 through the first control part 202 and the diode 200 , the first control part 202 is connected in parallel with the diode 200 , and the other contact of the first capacitor 302 is connected to the negative bus bar 104 .

Or one contact of the first capacitor 302 is connected to the negative bus bar 104 through the first control part 202 and the diode 200, the first control part 202 is connected in parallel with the diode 200, and the other contact of the first capacitor 302 is connected to the positive bus bar 102 .

One contact of the second capacitor 304 is connected to the positive bus bar 102 through the second control component 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 bar 104 through the second control component 204 , and the other contact of the second capacitor 304 is connected to the positive bus 102 .

The conduction direction of the diode 200 is that the positive bus bar 102 conducts to the first capacitor 302 , or the first capacitor 302 conducts to the negative bus bar 104 .

Embodiment twenty-two:

The present application provides a laundry treatment device including the control device according to at least one of the above embodiments, and thus the clothes treatment device includes all the beneficial effects of the control device according to at least one of the above embodiments.

Specifically, when the laundry treatment device is in the washing mode, the control device needs to control the motor 900 to work with low power, low speed and high torque, and the first control circuit 402 controls the first control part 202 to conduct, and communicates with the first control part 202 The capacitors 300 connected in series are connected to the control device, so that at least two capacitors 300 are connected in parallel, the total capacitance 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, thereby ensuring laundry treatment. At the same time of the cleaning effect of the device on clothes, the noise of the clothes treatment device when cleaning clothes is reduced, and the noise pollution caused by the clothes treatment device to the indoor environment is reduced, so that the user can obtain a better experience.

When the laundry treatment device is in the dehydration mode, the control device needs to control the motor 900 to work with high power, high speed and low torque. Not connected to the control device, the control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. In addition, when the motor 900 operates with high power, high speed and low torque, the capacitor 300 connected in series with the first control part 202 is not connected to the control device, thereby reducing the use frequency of the capacitor 300 connected in series with the first control part 202, and improving the connection with the first control part 202. A capacitor 300 connected in series with a control component 202 has a service life, thereby reducing the use cost of the control device.

The laundry treatment device further includes a washing tub, and the motor is used for driving the washing tub to rotate.

Embodiment 23:

Specifically, when the laundry treatment device is in the washing mode, the control device needs to control the motor 900 to work with low power, low speed and high torque, the first control part 202 is turned on, and the first control part 202 short-circuits the diode 200 to connect with the first control part 200. A capacitor 300 connected in series with the control unit 202 is charged and discharged, so that at least two capacitors 300 are connected in parallel, while absorbing the surge voltage, the total capacitance value of the capacitors 300 is increased, the torque ripple of the motor 900 is reduced, and the motor 900 is further reduced. Noise during operation, thereby ensuring the cleaning effect of the clothes treatment device on clothes, reducing the noise of the clothes treatment device when cleaning clothes, reducing the noise pollution caused by the clothes treatment device to the indoor environment, so that users can get better experience. And when the clothes treatment device is working, the surge voltage on the input side of the AC power supply is absorbed by the capacitor 300 connected in series with the first control part 202 and the diode 200 to ensure that the clothes treatment device can meet the surge test requirements of relevant standards, such as IEC ( International Electrotechnical Commission, International Electrotechnical Commission) standard or Chinese national standard surge test.

When the laundry treatment device is in the dehydration mode, the control device needs to control the motor 900 to work with high power, high speed, and low torque, the first control part 202 is disconnected, and the diode 200 prevents the capacitor 300 connected in series with the diode 200 from being charged and discharged. At the same time of surge voltage, the control device works in the small capacitor/no electrolytic capacitor working mode, which can improve the input power factor of the control device, reduce the harmonics of the input current, and reduce the pollution of the control device to the power grid. And when the motor 900 is working with high power, high speed and low torque, the capacitor 300 connected in series with the diode 200 will not be charged and discharged, reducing the use frequency of the capacitor 300 connected in series with the diode 200, and improving the use of the capacitor 300 connected in series with the diode 200. life, thereby reducing the cost of use of the control device.

In the claims, description and drawings of the present application, the term "plurality" refers to two or more, unless there is an additional explicit definition, the orientation or position indicated by the terms "upper", "lower", etc. The relationship is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and making the description process easier, rather than indicating or implying that the device or element referred to must have the specific orientation described, so as to make the description easier. A specific orientation is constructed and operated, so these descriptions should not be construed as a limitation on this application; the terms "connected", "installed", "fixed", etc. should be understood in a broad sense, for example, "connected" can be between multiple objects. The fixed connection can also be a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances of the above data.

In the claims, description, and drawings of this application, the terms "one embodiment," "some embodiments," "specific embodiments," and the like refer to specific features, structures, and descriptions in connection with the embodiment or example. , material or feature is included in at least one embodiment or example of the present application. In the claims, specification, and specification drawings of this application, schematic representations of the above terms do not necessarily refer to the same embodiment or instance. 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 descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

A control device, wherein the control device is used to control a motor, and the control device comprises:

at least two bus bars, the at least two bus bars are used to connect with the motor;

a first control part, one end of the first control part is connected to one of the at least two bus bars;

At least two capacitors, one end of one of the at least two capacitors is connected to the other end of the first control component, and the other end is connected to the other busbar of the at least two busbars, the at least two busbars Two ends of the other of the two capacitors are respectively connected to the at least two bus bars.
The control device of claim 1, further comprising:

a first control circuit, the first control circuit is connected with the first control part to control the first control part to be turned on or off according to the operating state of the motor.
The control device of claim 1, wherein the at least two capacitors comprise:

a first capacitor, one end of the first capacitor is connected to the first control component, and the other end is connected to the other bus bar of the at least two bus bars;

A second capacitor, two ends of the second capacitor are respectively connected to the at least two bus bars.
The control device according to claim 3, wherein,

The capacitance value of the first capacitor is greater than the capacitance value of the second capacitor.
The control device according to claim 3, wherein,

The capacitance of the first capacitor is less than or equal to 100 μF;

The capacitance of the second capacitor is less than or equal to 10 μF.
The control device according to claim 3, wherein,

The second capacitor is a thin film capacitor.
The control device of claim 3, further comprising:

A second control component, one end of the second control component is connected to one of the at least two bus bars, and the other end is connected to the second capacitor.
The control device of claim 6, further comprising:

A second control circuit, the second control circuit is connected with the second control part to control the turn-on or disconnection of the second control part.
The control device according to at least one of claims 1 to 8, further comprising:

a rectifier circuit, one side of the rectifier circuit is used to connect the power supply, and the other side is connected to the at least two bus bars;

an inverter circuit, the inverter circuit is connected with the at least two bus bars;

The motor is connected to the inverter circuit.
A control device, wherein the control device is used to control a motor, and the control device comprises:

diode;

at least two bus bars, the at least two bus bars are used to connect with the motor;

a first control part, the first control part is connected in parallel with the diode, and one end of the first control part and the diode is connected to one of the at least two bus bars at the same time;

At least two capacitors, one end of one of the at least two capacitors is connected to the other end of the first control component and the diode at the same time, and the other end is connected to the other busbar of the at least two busbars. connected, two ends of the other capacitor in the at least two capacitors are respectively connected with the at least two bus bars.
The control device of claim 10, further comprising:

a first control circuit, the first control circuit is connected with the first control part to control the first control part to be turned on or off according to the operating state of the motor.
The control device of claim 10, wherein the at least two capacitors comprise:

a first capacitor, one end of the first capacitor is connected to the first control component and the diode at the same time, and the other end is connected to the other one of the at least two bus bars;

A second capacitor, two ends of the second capacitor are respectively connected to the at least two bus bars.
The control device of claim 12, wherein,

The capacitance value of the first capacitor is greater than the capacitance value of the second capacitor.
The control device of claim 12, wherein,

The capacitance of the first capacitor is less than or equal to 100 μF;

The capacitance of the second capacitor is less than or equal to 10 μF.
The control device of claim 12, further comprising:

A second control component, one end of the second control component is connected to one of the at least two bus bars, and the other end is connected to the second capacitor.
The control device of claim 15, further comprising:

A second control circuit, the second control circuit is connected with the second control part to control the turn-on or disconnection of the second control part.
The control device according to at least one of claims 10 to 16, further comprising:

a rectifier circuit, one side of the rectifier circuit is used to connect the power supply, and the other side is connected to the at least two bus bars;

an inverter circuit, the inverter circuit is connected with the at least two bus bars;

The motor is connected to the inverter circuit.
The control device of claim 12, wherein,

The second capacitor is a thin film capacitor.
A laundry treatment device comprising the control device of at least one of claims 1 to 9, or the control device of at least one of claims 10 to 18.