Variable frequency motor controller and laundry treating apparatus

Abstract

This disclosure relates to a variable frequency motor controller and a garment processing device. The variable frequency motor controller includes a rectifier module, an energy discharge module, a voltage regulator module, a control module, a selector switch module, and a power module. The control module is connected to the selector switch module, which is connected to both the energy discharge module and the voltage regulator module. When the garment processing device is in an energy-dissipating braking state, the control module controls the selector switch module to connect the energy discharge module across the DC bus and disconnect the voltage regulator module from the DC bus, thereby allowing the energy discharge module to discharge the regenerative energy generated during braking. According to embodiments of this disclosure, rapid braking and extended lifespan of the voltage regulator module can be achieved. Furthermore, since no additional mechanical devices are required, mechanical friction and vibration are avoided, thus saving costs and reducing noise.

Description

Technical Field

[0001] This disclosure relates to the field of clothing processing equipment technology, and in particular to variable frequency motor controllers and clothing processing equipment. Background Technology

[0002] With the development of garment processing technology, various garment processing equipment has emerged, such as washing machines, dryers, and washer-dryer combos. These garment processing devices typically include garment processing containers. For example, washing machines have washing and spin-drying drums, dryers have drying drums, and washer-dryer combos have washing, spin-drying, and drying drums. When the garment processing equipment enters an energy-saving braking state, the garment processing container needs to decelerate from its highest speed to a complete stop, thus achieving braking.

[0003] Currently, mechanical braking or electromagnetic braking is generally used to stop the garment processing container. However, mechanical braking is noisy and requires additional mechanical devices (such as clutches), which is costly. Electromagnetic braking takes a long time and the stopping response is not timely. Summary of the Invention

[0004] To address the aforementioned technical problems, this disclosure provides a variable frequency motor controller and a garment processing device.

[0005] In a first aspect, this disclosure provides a variable frequency motor controller, including: a rectifier module, an energy discharge module, a voltage regulator capacitor module, a control module, a selection switch module, and a power module;

[0006] The rectifier module is used to convert the AC power input from the AC input side into DC power;

[0007] The control module is connected to the selection switch module, which is connected to the energy discharge module and the voltage regulator module respectively. When the clothing processing equipment is in an energy-consuming braking state, the control module controls the selection switch module to connect the energy discharge module across the DC bus and controls the selection switch module to disconnect the voltage regulator module from the DC bus, so that the energy discharge module discharges the regenerative energy generated by the clothing processing equipment during the braking process.

[0008] The power module and the control module are connected. The control module is used to generate a motor control signal based on the motor phase current, and the power module is used to drive the motor in the clothing processing equipment according to the motor control signal.

[0009] Optionally, the control module is further configured to, when the garment processing equipment is in electric operation, control the selection switch module to disconnect the energy discharge module from the DC bus and control the selection switch module to connect the voltage stabilizing capacitor module across the DC bus, so that the voltage stabilizing capacitor module stabilizes the voltage on the DC bus.

[0010] Optionally, the energy discharge module includes a discharge resistor unit.

[0011] Optionally, the resistance value of the discharge resistor unit is adjustable.

[0012] Optionally, the control module is also used to adjust the resistance value of the discharge resistor unit.

[0013] Optionally, the control module is further configured to determine a target value for the resistance of the discharge resistor unit based on the brake motor speed and the desired braking duration, and adjust the resistance of the discharge resistor unit to the target value, wherein the brake motor speed is the motor speed when the clothing processing equipment enters the energy-saving braking state.

[0014] Optionally, the control module is used to query a preset mapping relationship to determine the target value corresponding to the brake motor speed and the desired braking duration, wherein the preset mapping relationship is the correlation between the motor speed, braking duration and resistance value.

[0015] Optionally, the control module is further configured to adjust the resistance value of the discharge resistor unit in response to a user's resistance value adjustment operation.

[0016] Optionally, the selection switch module includes a single-pole double-throw switch unit;

[0017] Alternatively, the selection switch module includes a first switch unit and a second switch unit, wherein the first switch unit and the energy discharge module are connected in series and then connected across the DC bus, and the second switch unit and the voltage regulator capacitor module are connected in series and then connected across the DC bus.

[0018] Secondly, this disclosure also provides a garment processing device, comprising:

[0019] Electric motor;

[0020] The variable frequency motor controller described in the first aspect.

[0021] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0022] The variable frequency motor controller and clothing processing equipment of this disclosure include a rectifier module, an energy discharge module, a voltage regulator module, a control module, a selector switch module, and a power module. The rectifier module converts AC input from the AC input side into DC input. The control module is connected to the selector switch module, which is also connected to the energy discharge module and the voltage regulator module. When the clothing processing equipment is in a regenerative braking state, the control module controls the selector switch module to connect the energy discharge module across the DC bus and disconnect the voltage regulator module from the DC bus, so that the energy discharge module discharges the regenerative energy generated by the clothing processing equipment during braking. The power module is connected to the control module. The control module generates a motor control signal based on the motor phase current, and the power module drives the motor in the clothing processing equipment according to the motor control signal. As can be seen, by adopting the above technical solution, when the clothing processing equipment is in an energy-consumption braking state, the energy discharge module can dissipate the regenerative energy generated during the braking process. For example, the kinetic energy generated by the high-speed rotation of the motor and clothing processing container is converted into electrical energy and is eventually quickly discharged through the energy discharge module, thereby achieving the purpose of rapid braking. Furthermore, disconnecting the voltage regulator module from the DC bus voltage prevents regenerative energy from rapidly charging the voltage regulator module and damaging the capacitor, thus improving the lifespan of the voltage regulator module. Moreover, by adopting the above technical solution, no additional mechanical devices are required, avoiding mechanical friction and vibration, thus saving costs and reducing noise. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a variable frequency motor controller provided in an embodiment of the present disclosure;

[0026] Figure 2 This is a schematic diagram of another variable frequency motor controller provided in an embodiment of the present disclosure;

[0027] Figure 3 This is a schematic diagram of the structure of a variable frequency motor controller in energy-consumption braking state provided by an embodiment of the present disclosure;

[0028] Figure 4This is a schematic diagram of the structure of a variable frequency motor controller in electric operation state, provided as an embodiment of the present disclosure. Detailed Implementation

[0029] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0030] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0031] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0032] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0033] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0034] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0035] Figure 1 This is a schematic diagram of the structure of a variable frequency motor controller provided in an embodiment of this disclosure. Figure 1 As shown, the variable frequency motor controller includes: a rectifier module 110, an energy discharge module 120, a voltage regulator capacitor module 130, a selector switch module 140, a power module 150, and a control module 160.

[0036] The rectifier module 110 is used to convert the AC power input from the AC input side into DC power;

[0037] The control module 160 is connected to the selector switch module 140, which is connected to the energy discharge module 120 and the voltage regulator module 130 respectively. When the clothing processing equipment is in the energy consumption braking state, the control module 160 controls the selector switch module 140 to connect the energy discharge module 120 across the DC bus and controls the selector switch module 140 to disconnect the voltage regulator module 130 from the DC bus, so that the energy discharge module 120 discharges the regenerative energy generated by the clothing processing equipment during the braking process.

[0038] The power module 150 and the control module 160 are connected. The control module 160 is used to generate a motor control signal based on the motor phase current, and the power module 150 is used to drive the motor in the clothing processing equipment based on the motor control signal.

[0039] Optionally, the control module 160 is also used to control the selection switch module 140 to disconnect the energy discharge module 120 from the DC bus and control the selection switch module 140 to connect the voltage regulator module 130 across the DC bus when the garment processing equipment is in electric operation, so that the voltage regulator module 130 stabilizes the voltage on the DC bus.

[0040] Specifically, the specific circuit structure of the rectifier module 110 can be configured by those skilled in the art according to actual conditions, and is not limited here. For example, the rectifier module 110 may include a rectifier bridge, etc., but is not limited thereto.

[0041] Specifically, there are various circuit structures for the selector switch module 140. Typical examples are described below, but they do not constitute a limitation of this disclosure.

[0042] In some embodiments, the selector switch module 140 includes a single-pole double-throw switch unit. This makes the selector switch module 140 simple in structure and low in cost.

[0043] Specifically, the single-pole double-throw switch unit includes a common terminal, a normally open terminal, and a normally closed terminal. In some examples, the common terminal is connected to the positive terminal of the DC bus, the normally open terminal is connected to the first terminal of the energy discharge module 120, the second terminal of the energy discharge module 120 is connected to the negative terminal of the DC bus, the normally closed terminal is connected to the first terminal of the voltage regulator module 130, and the second terminal of the voltage regulator module 130 is connected to the negative terminal of the DC bus. In other examples, the common terminal is connected to the positive terminal of the DC bus, the normally closed terminal is connected to the first terminal of the energy discharge module 120, the second terminal of the energy discharge module 120 is connected to the negative terminal of the DC bus, the normally open terminal is connected to the first terminal of the voltage regulator module 130, and the second terminal of the voltage regulator module 130 is connected to the negative terminal of the DC bus. In some other examples, the common terminal is connected to the negative terminal of the DC bus, the normally open terminal is connected to the first terminal of the energy discharge module 120, the second terminal of the energy discharge module 120 is connected to the positive terminal of the DC bus, the normally closed terminal is connected to the first terminal of the voltage regulator module 130, and the second terminal of the voltage regulator module 130 is connected to the positive terminal of the DC bus. In still other examples, the common terminal is connected to the negative terminal of the DC bus, the normally closed terminal is connected to the first terminal of the energy discharge module 120, the second terminal of the energy discharge module 120 is connected to the positive terminal of the DC bus, the normally open terminal is connected to the first terminal of the voltage regulator module 130, and the second terminal of the voltage regulator module 130 is connected to the positive terminal of the DC bus.

[0044] For example, a single-pole double-throw switch unit may include a single-pole double-throw relay, but is not limited thereto.

[0045] In other embodiments, Figure 2 This is a schematic diagram of another variable frequency motor controller provided in an embodiment of the present disclosure, as shown below. Figure 2 As shown, the selection switch module 140 includes a first switch unit 141 and a second switch unit 142. The first switch unit 141 and the energy discharge module 120 are connected in series and then connected across the DC bus. The second switch unit 142 and the voltage regulator capacitor module 130 are connected in series and then connected across the DC bus.

[0046] Specifically, the first switching unit 141 and the second switching unit 142 are independent of each other. For example, the first switching unit 141 includes a relay or a switching transistor, and the second switching unit 142 includes a relay or a switching transistor, wherein the switching transistor may include a bipolar junction transistor (BJT) or a field-effect transistor (FET). This allows for faster switching speeds in the selection switching module 140.

[0047] Specifically, in some examples, the first terminal of the first switching unit 141 is connected to the positive terminal of the DC bus, the second terminal of the first switching unit 141 is connected to the first terminal of the energy discharge module 120, and the second terminal of the energy discharge module 120 is connected to the negative terminal of the DC bus. In other examples, the first terminal of the first switching unit 141 is connected to the negative terminal of the DC bus, the second terminal of the first switching unit 141 is connected to the first terminal of the energy discharge module 120, and the second terminal of the energy discharge module 120 is connected to the positive terminal of the DC bus. When the first and second terminals of the first switching unit 141 are connected, the energy discharge module 120 is connected across the DC bus.

[0048] Specifically, in some examples, the first terminal of the second switching unit 142 is connected to the positive terminal of the DC bus, and the second terminal of the second switching unit 142 is connected to the first terminal of the voltage regulator module 130, while the second terminal of the voltage regulator module 130 is connected to the negative terminal of the DC bus. In other examples, the first terminal of the second switching unit 142 is connected to the negative terminal of the DC bus, and the second terminal of the second switching unit 142 is connected to the first terminal of the voltage regulator module 130, while the second terminal of the voltage regulator module 130 is connected to the positive terminal of the DC bus. When the first and second terminals of the second switching unit 142 are switched on, the voltage regulator module 130 is connected across the DC bus.

[0049] Specifically, energy-saving braking refers to the use of regenerative energy in a specific way to achieve rapid braking when the motor needs to stop quickly. Examples of scenarios where the motor needs to stop quickly include: when switching between forward and reverse rotation, when dehydration ends, when drying ends, or during emergency stops (such as when the user opens the door of the dehydration drum during dehydration or when a malfunction occurs), but are not limited to these.

[0050] It can be understood that when the motor in the garment processing equipment rotates at high speed, it drives the garment processing container to rotate at high speed. During this process, the motor and the garment processing container accumulate a large amount of kinetic energy. When the motor decelerates or stops from its high-speed rotation state, the motor actually becomes a generator. The rotor of the motor continues to rotate under the action of inertia, cutting magnetic field lines and generating an induced electromotive force. The generated induced electromotive force causes the motor to generate current, which flows back to the DC bus. At this time, since the energy discharge module 120 is connected to the DC bus, the energy discharge module 120 can discharge the regenerated electrical energy, thereby dissipating the kinetic energy accumulated in the motor and the garment processing container to achieve rapid braking. Furthermore, disconnecting the voltage regulator module from the DC bus voltage can prevent the regenerated electrical energy from rapidly charging the voltage regulator module and damaging the capacitor, thereby improving the life of the voltage regulator module.

[0051] It should be noted that the energy discharge module 120 can be connected to the DC bus in a continuous or dynamic manner. For example, in the energy consumption braking state, it can be turned on or off as needed (for example, when the DC bus voltage is detected to exceed the set threshold, the energy discharge module 120 is controlled to connect to the DC bus, otherwise the energy discharge module 120 is controlled to disconnect from the DC bus), to ensure the braking process is fast and controllable.

[0052] Optionally, the energy discharge module 120 includes a discharge resistor unit. It should be noted that the specific number of discharge resistors in the discharge resistor unit can be set by those skilled in the art according to actual conditions, and is not limited here. For example, the resistance value of the discharge resistor unit is fixed, and the discharge resistor unit includes a discharge resistor with a fixed resistance value, but it is not limited to this.

[0053] It is understandable that by including a discharge resistor unit in the energy discharge module 120, the energy discharge module 120 can convert regenerated energy into heat energy and quickly consume the regenerated energy to achieve rapid braking.

[0054] Specifically, the electric operating state refers to the state when the motor is running normally. The motor consumes electrical energy to drive the clothes processing container to rotate. At this time, the rectifier module 110, the voltage regulator module 130, and the power module 150 connected in sequence form the main circuit. Exemplary scenarios for normal motor operation include: when the motor is continuously rotating forward or reverse during washing, during spin-drying, or during drying, etc., but are not limited to these.

[0055] Optionally, the voltage regulator module 130 includes a voltage regulator capacitor. It should be noted that the specific number of voltage regulator capacitors can be set by those skilled in the art according to actual conditions, and is not limited here. For example, the voltage regulator module 130 includes a large electrolytic capacitor (i.e., a voltage regulator capacitor) connected across the DC bus. The capacitance value of the large electrolytic capacitor is in the range of 270 microfarads to 390 microfarads, but is not limited to this range.

[0056] Specifically, the specific circuit structure of the control module 160 can be configured by those skilled in the art according to actual conditions, and is not limited here. For example, the control module 160 includes a control unit 161 and a sampling unit 162. The control unit 161 may include a controller such as an MCU, and the sampling unit 162 can transmit the acquired motor phase current to the control unit 161. Thus, the control unit 161 can generate a motor control signal based on the motor phase current. Of course, in other examples, the sampling unit 162 can also acquire the DC bus voltage and AC input side electrical parameters (AC input current and / or AC input voltage) so that the control unit 161 can generate a motor control signal based on the motor phase current, DC bus voltage, and AC input side electrical parameters.

[0057] Specifically, the specific signal type of the motor control signal can be set by those skilled in the art according to the actual situation, and is not limited here. For example, the motor control signal can be a PWM signal, but it is not limited to this.

[0058] Specifically, the specific circuit implementation of the power module 150 can be configured by those skilled in the art according to actual conditions, and is not limited here. For example, the power module 150 may include an intelligent power module (IPM) or an inverter, wherein the inverter includes power switching transistors, which may include insulated gate bipolar transistors (IGBTs) or MOSFETs, but are not limited thereto.

[0059] Optionally, the variable frequency motor controller may also include a reactor to reduce input current harmonics, improve power factor, stabilize input voltage, protect the rectifier bridge, and improve electromagnetic compatibility.

[0060] For example, Figure 3 This is a schematic diagram of the structure of a variable frequency motor controller in energy-consumption braking state, provided in an embodiment of this disclosure. Figure 4 This is a schematic diagram of the structure of a variable frequency motor controller in motor operating state, provided as an embodiment of this disclosure. Figure 3 and Figure 4 As shown, in regenerative braking mode, when rapid braking is required, the control unit 161 controls the selection switch module 140, causing the voltage regulator module 130 to open and the discharge resistor unit to be connected to the DC bus. The kinetic energy generated by the high-speed rotation of the motor and the clothes handling container is quickly discharged through the discharge resistor unit, thereby achieving the purpose of rapid braking. In electric operation mode, when the washing machine is working normally, the control unit 161 controls the selection switch module 140, causing the voltage regulator module 130 to be connected to the DC bus and the discharge resistor unit to be open.

[0061] In this embodiment of the invention, employing the aforementioned technical solution, when the garment processing equipment is in an energy-consumption braking state, the energy discharge module can dissipate the regenerative energy generated during the braking process. For example, the kinetic energy generated by the high-speed rotation of the motor and garment processing container is converted into electrical energy and ultimately rapidly discharged through the energy discharge module, thereby achieving rapid braking. Furthermore, disconnecting the voltage regulator module from the DC bus voltage prevents rapid charging of the voltage regulator module by regenerative energy, thus avoiding damage to the capacitor and extending its lifespan. Moreover, this technical solution eliminates the need for additional mechanical devices, avoiding mechanical friction and vibration, thereby saving costs and reducing noise.

[0062] In other embodiments of this disclosure, the resistance value of the discharge resistor unit is adjustable.

[0063] Specifically, the phrase "the resistance value of the discharge resistor unit is adjustable" means that when the discharge resistor unit is connected across the DC bus, the resistance value connected to the DC bus is adjustable.

[0064] Specifically, the discharge resistor unit may include a digital potentiometer or a sliding rheostat, but is not limited to these. Of course, in some other examples, the discharge resistor unit includes multiple resistors connected in series, and a switching element can be connected in parallel across each resistor to control whether the resistor is connected to the DC bus. Of course, in still other examples, the discharge resistor unit includes multiple resistors connected in parallel, and a switching element can be connected in series before or after each resistor to control whether the resistor is connected to the DC bus. But it is not limited to these examples.

[0065] Understandably, by making the resistance value of the discharge resistor unit adjustable, it is beneficial to make the resistance value of the discharge resistor unit more closely match the energy discharge requirements, thereby improving the energy discharge efficiency and thus increasing the braking speed.

[0066] In some embodiments, the user can manually adjust the resistance value of the discharge resistor unit directly. This makes adjusting the resistance value of the discharge resistor unit more intuitive, simpler, more reliable, and less expensive.

[0067] In other embodiments, the control module 160 is also used to adjust the resistance value of the discharge resistor unit. This allows for more precise, faster, and more intelligent adjustment of the discharge resistor unit's resistance value.

[0068] Optionally, the control module 160 is further configured to determine a target value for the resistance of the discharge resistor unit based on the brake motor speed and / or the desired braking duration, and adjust the resistance of the discharge resistor unit to the target value, wherein the brake motor speed is the motor speed when the garment processing equipment enters the energy-saving braking state.

[0069] It is understandable that the higher the speed of the brake motor, the more regenerative energy is generated. To effectively handle this increased regenerative energy, the resistance value of the discharge resistor unit should be appropriately increased. A larger resistance value provides greater power dissipation capacity, thereby discharging regenerative energy more quickly. Furthermore, to achieve a shorter braking time, the resistance value of the discharge resistor unit should be moderate. An excessively large resistance value will result in a smaller current, slower energy dissipation, and a longer braking time. An excessively small resistance value will result in an excessively large current, potentially causing the discharge resistor unit to overheat or even be damaged. In this embodiment, by setting the control module 160 to determine a target value for the resistance of the discharge resistor unit based on the brake motor speed and / or the desired braking duration, a more suitable target value can be obtained, thereby ensuring the energy dissipation speed while avoiding damage to the discharge resistor unit.

[0070] In some examples, the control module 160 is used to query a preset mapping relationship to determine the target values ​​corresponding to the brake motor speed and the desired braking duration. The preset mapping relationship is the correlation between the motor speed, braking duration, and resistance value. This makes the determination of the target value simpler, more convenient, and more efficient. It should be noted that the preset mapping relationship can be pre-calibrated and stored in the control module 160, but is not limited to this.

[0071] In other examples, the control module 160 is used to input the brake motor speed and the desired braking duration into a pre-trained neural network model and obtain the target value output by the neural network model. In this way, accurate target values ​​can be provided for various brake motor speeds and desired braking durations.

[0072] In some other examples, the control module 160 is also configured to adjust the resistance value of the discharge resistor unit in response to a user's resistance adjustment operation. This allows the user to flexibly adjust the resistance value of the discharge resistor unit connected to the DC bus according to their own braking needs, making the resistance value adjustment of the discharge resistor unit more flexible and better suited to the user's requirements.

[0073] Based on the above embodiments, this disclosure also provides a garment processing device, which includes a motor and a variable frequency motor controller as described in any of the above embodiments.

[0074] Specifically, the clothing processing equipment can be, for example, a washing machine, a dryer, a washer-dryer combo, etc., and the embodiments disclosed herein are not limited thereto.

[0075] The garment processing equipment provided in this embodiment has the same beneficial effects as the variable frequency motor controller provided in this embodiment, and will not be described in detail here.

[0076] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A variable frequency motor controller, characterized in that, include: Rectifier module, energy discharge module, voltage regulator capacitor module, control module, selection switch module and power module; The rectifier module is used to convert the AC power input from the AC input side into DC power; The control module is connected to the selection switch module, which is connected to the energy discharge module and the voltage regulator module respectively. When the clothing processing equipment is in an energy-consuming braking state, the control module controls the selection switch module to connect the energy discharge module across the DC bus and controls the selection switch module to disconnect the voltage regulator module from the DC bus, so that the energy discharge module discharges the regenerative energy generated by the clothing processing equipment during the braking process. The power module and the control module are connected. The control module is used to generate a motor control signal based on the motor phase current, and the power module is used to drive the motor in the clothing processing equipment according to the motor control signal.

2. The variable frequency motor controller according to claim 1, characterized in that, The control module is also used to control the selection switch module to disconnect the energy discharge module from the DC bus and control the selection switch module to connect the voltage regulator module across the DC bus when the clothing processing equipment is in electric working state, so as to stabilize the voltage on the DC bus.

3. The variable frequency motor controller according to claim 1, characterized in that, The energy discharge module includes a discharge resistor unit.

4. The variable frequency motor controller according to claim 3, characterized in that, The resistance value of the discharge resistor unit is adjustable.

5. The variable frequency motor controller according to claim 4, characterized in that, The control module is also used to adjust the resistance value of the discharge resistor unit.

6. The variable frequency motor controller according to claim 5, characterized in that, The control module is also used to determine the target value of the resistance value of the discharge resistor unit based on the brake motor speed and the desired braking duration, and adjust the resistance value of the discharge resistor unit to the target value, wherein the brake motor speed is the motor speed when the clothing processing equipment enters the energy consumption braking state.

7. The variable frequency motor controller according to claim 6, characterized in that, The control module is used to query a preset mapping relationship to determine the target value corresponding to the speed of the brake motor and the desired braking duration. The preset mapping relationship is the correlation between the motor speed, braking duration and resistance value.

8. The variable frequency motor controller according to claim 5, characterized in that, The control module is also used to adjust the resistance value of the discharge resistor unit in response to the user's resistance value adjustment operation.

9. The variable frequency motor controller according to claim 1, characterized in that, The selection switch module includes a single-pole double-throw switch unit; Alternatively, the selection switch module includes a first switch unit and a second switch unit, wherein the first switch unit and the energy discharge module are connected in series and then connected across the DC bus, and the second switch unit and the voltage regulator capacitor module are connected in series and then connected across the DC bus.

10. A garment processing device, characterized in that, include: Electric motor; The variable frequency motor controller as described in any one of claims 1 to 9.

Images